text stringlengths 1 1.11k | source dict |
|---|---|
computability, turing-machines, church-turing-thesis
I am not confident that either approach is correct or not, and wonder whether either of the above is a correct tact or if a formal proof exists for this? Hint: Your computation model is Turing-complete. If you could compute an upper bound, that would enable you to s... | {
"domain": "cs.stackexchange",
"id": 1348,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "computability, turing-machines, church-turing-thesis",
"url": null
} |
biochemistry, enzymes
There may be biochemical reasons at work in other cases -- for instance, some molecules may just bind better to the protein that you want to regulate, and that's why they're chosen by evolution. I think this is a case when it will be hard to come up with a blanket explanation -- it's better to lo... | {
"domain": "biology.stackexchange",
"id": 6473,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "biochemistry, enzymes",
"url": null
} |
ros, rviz, openi-tracker, baxter, transform
Title: Having trouble with making openni_depth_frame a visable child of Baxter's head in Rviz
I'm using a kinect with Baxter. I am having a problem getting baxter to move one of its hands to a humans hand to grab something from it.
In order to track people I am using
openni... | {
"domain": "robotics.stackexchange",
"id": 27035,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "ros, rviz, openi-tracker, baxter, transform",
"url": null
} |
quantum-mechanics, quantum-optics, operators, group-theory, non-linear-optics
Title: Linearizing Quantum Operators I was reading an article on harmonic generation and came across the following way of decomposing the photon field operator.
$$ \hat{A}={\langle}\hat{A}{\rangle}I+ \Delta\hat{a}$$
The right hand side is a... | {
"domain": "physics.stackexchange",
"id": 1772,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-mechanics, quantum-optics, operators, group-theory, non-linear-optics",
"... |
(My actual code is a little different, but the strategy is the same.)
After a letting my search run for about a day, I realized that the search space was shrinking enough with each new $x$ that I could determine the smallest value in a reasonable timeframe. I let the search run for three more days, and the smallest va... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9817357237856482,
"lm_q1q2_score": 0.8003428601911058,
"lm_q2_score": 0.8152324915965392,
"openwebmath_perplexity": 358.37174993102883,
"openwebmath_score": 0.7390493750572205,
"ta... |
formal-languages, context-free, pushdown-automata
Motivation:
The Nerode equivalence classes each correspond to a distinct state in any automaton that recognizes $L$. Each CFL can be recognized by an NPDA, which has a finite number of states but also a potentially unbounded stack of alphabet symbols. The stack keeps... | {
"domain": "cs.stackexchange",
"id": 1945,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "formal-languages, context-free, pushdown-automata",
"url": null
} |
gazebo, simulation, roomba, turtlebot, turtlebot-simulator
Title: turtlebot_simulator on hydro barely usable due to robot slipping
I just tried out the turtlebot_simulator for hydro (everything installed from .debs) using a roomba base and the robot is moving pretty erratic. If a turn is commanded, the robot will kee... | {
"domain": "robotics.stackexchange",
"id": 19219,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "gazebo, simulation, roomba, turtlebot, turtlebot-simulator",
"url": null
} |
php, security, network-file-transfer
echo "Sorry, your file was not uploaded.";
// if everything is ok, try to upload file
} else {
if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
header('Location: files.php?alert=1;');
} else {
header('Location: files.php?alert=2;'... | {
"domain": "codereview.stackexchange",
"id": 22903,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "php, security, network-file-transfer",
"url": null
} |
for the case/z= 1 are also proved. ). If we take transpose of transpose matrix, the matrix obtained is equal to the original matrix. Joined Oct 19, 2018 Messages 127. Conjugate of a complex number z = a + ib, denoted by $$\bar{z}$$, is defined as $$\bar{z}$$ = a - ib i.e., $$\overline{a + ib}$$ = a - ib. We list severa... | {
"domain": "nileshverma.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9626731158685837,
"lm_q1q2_score": 0.8201520656810721,
"lm_q2_score": 0.851952809486198,
"openwebmath_perplexity": 448.3737040578081,
"openwebmath_score": 0.9224682450294495,
"ta... |
telescope, temperature
I'm guessing, though I may be wrong, you have little or no understanding of collimation. Simply put, collimation is the proper alignment of the optical components in the telescope. If the mirrors and lenses are not properly aligned, it introduces further errors in the path of light, which mani... | {
"domain": "astronomy.stackexchange",
"id": 3150,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "telescope, temperature",
"url": null
} |
navigation, mapping, sicklms, laserscan
Title: For mapping, what should i do after connecting to the laser?
Hi everyone!
It's my first question and i'm so new to ROS (and even Linux :/ )
Anyway i tried to create a map with laser scanner, Sick LMS100. I installed lms1xx drivers, and i wrote the code "rosrun lms1xx LM... | {
"domain": "robotics.stackexchange",
"id": 24557,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "navigation, mapping, sicklms, laserscan",
"url": null
} |
the-moon, tidal-forces
Title: When did the Moon become tidally locked to Earth? According to various theories the Moon was created around 4.5 billion years ago. About all of these theories suggest that it was rotating around its axis at that time though. Currently, Moon is at tidal lock with Earth, despite some monthl... | {
"domain": "astronomy.stackexchange",
"id": 6343,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "the-moon, tidal-forces",
"url": null
} |
c++, algorithm, game-of-life, sdl
gameMenu->WindowResized(gameWindowWidth, gameWindowHeight);
break;
case RANDOMIZE_BTN:
RandomizeBoard(std::stoi(gameMenu->GetTextBoxValue(RANDOMIZE_PERCENT_TXT)));
break;
case GRID_SIZE_X_TXT + NUM_BUTTON_TYPE:
textBoxFoc... | {
"domain": "codereview.stackexchange",
"id": 27802,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c++, algorithm, game-of-life, sdl",
"url": null
} |
• If $\operatorname {Log}$ is the principal branch, then $$\operatorname {Re}(4 \operatorname {Log}(z)/3) = \operatorname {Log} 2 \land \operatorname {Im}(4 \operatorname {Log}(z)/3 - \pi i) = 0$$ (the case $n \equiv 0 \bmod 3$) has only one solution. The second equation should be $$\operatorname {Im}(4 \operatorname {... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9736446418006304,
"lm_q1q2_score": 0.8351613140209211,
"lm_q2_score": 0.8577680995361899,
"openwebmath_perplexity": 153.1658107393682,
"openwebmath_score": 0.9258570075035095,
"tag... |
symmetry, crystallography, lattices, bravais-lattices
When we work through all the constraints with each of the seven point-group symmetries, we find that a unique base-centered lattice exists only for the orthorhombic point-group symmetry, a unique body-centered lattice exists only for cubic, tetragonal and orthorhom... | {
"domain": "chemistry.stackexchange",
"id": 15900,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "symmetry, crystallography, lattices, bravais-lattices",
"url": null
} |
moveit, ros-melodic
Title: Class trajopt_interface/TrajOptPlanner cannot be found in Moveit tutorials
Hello ROS community. After successfully testing TrajOpt using the tutorial from ROS Industrial Training, I decided to try the fairly new tutorial provided in Moveit! master branch. Following the steps mentioned in th... | {
"domain": "robotics.stackexchange",
"id": 33949,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "moveit, ros-melodic",
"url": null
} |
java, hash-map
The difference here is that it becomes quite clear that the first part of the method is dealing with the case where the map doesn't have the element, and so that the rest of method can safely assume that it is not the case. It shows that the method returns early in that case.
Worth mentioning but the fa... | {
"domain": "codereview.stackexchange",
"id": 19343,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, hash-map",
"url": null
} |
python, python-3.x, file
For example the test below shows that 123_it.txt has both an
invalid language and file type as it's flag is FileState.INVALID.
>>> classifier = Classifier(\
ext=EXT,\
languages=LANGUAGES,\
time_limit=time.time() - (MAX_AGE * ... | {
"domain": "codereview.stackexchange",
"id": 37139,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, python-3.x, file",
"url": null
} |
neural-networks, convolutional-neural-networks, datasets, image-segmentation, fully-convolutional-networks
multi-scale training of images of different sizes in fully-convolutional nets in order to make the model more robust to changes in scale; and
having multi-scale architecture.
A place to start is to look at the... | {
"domain": "ai.stackexchange",
"id": 1884,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "neural-networks, convolutional-neural-networks, datasets, image-segmentation, fully-conv... |
quantum-field-theory, scattering, feynman-diagrams, interactions, wick-theorem
which, considering that time runs from left to right, seems like a nucleon joining an anti-nucleon in the vertex (arrows denote CHARGE FLOW).
After tweaking with this toy model, the only Feynman diagram I could obtain for this process was
... | {
"domain": "physics.stackexchange",
"id": 79836,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-field-theory, scattering, feynman-diagrams, interactions, wick-theorem",
... |
java, beginner, game, template
// Append the last part of the story
finishedStory.append(story[story.length - 1]);
return finishedStory.toString();
}
}
MadLibsGame
import java.util.Scanner;
public class MadLibsGame {
private final MadLibsStory[] stories;
public MadLibsGame() {
th... | {
"domain": "codereview.stackexchange",
"id": 43416,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, beginner, game, template",
"url": null
} |
the segmentation of one or few im-ages selected by you. Using Matlab ode45 to solve di erential equations Nasser M. I want the program to give the ranges of K and the solution associated with each value. Nonlinear Springs Goal: Investigate the behavior of nonlinear springs. The block represents a translational spring w... | {
"domain": "go.th",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9780517469248845,
"lm_q1q2_score": 0.815034572151864,
"lm_q2_score": 0.8333245911726382,
"openwebmath_perplexity": 1474.8000211455706,
"openwebmath_score": 0.5105333924293518,
"tags": null... |
quantum-mechanics, mathematical-physics, operators, momentum, hilbert-space
For those interested, this is a related question, also touching upon domain issues of momentum operators. Although we can define the momentum as a self-adjoint operator in $L^2[0,1]$ as you proposed, I think it's rather artificial to think abo... | {
"domain": "physics.stackexchange",
"id": 17159,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-mechanics, mathematical-physics, operators, momentum, hilbert-space",
"u... |
organic-chemistry, bond, molecular-structure
Carbon is tetravalent. Always. (Seriously, from now on never use *valen{ce .. cy .. t} again, please.)
Is this really a breakthrough of science or one of semantics and scientific media hype?
Of course it is. It is always something incredible when we refine our understand... | {
"domain": "chemistry.stackexchange",
"id": 7900,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "organic-chemistry, bond, molecular-structure",
"url": null
} |
quantum-field-theory, research-level, topological-field-theory, topological-order
At the B-model point the KW theory dimensionally reduces to the B model for the derived stack $Loc_G(\Sigma')$ of $G$-local systems on $\Sigma'$. The B-model for any target $X$ is expected to be given by the volume of a natural volume f... | {
"domain": "physics.stackexchange",
"id": 3322,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-field-theory, research-level, topological-field-theory, topological-order",... |
c#, programming-challenge, recursion, dynamic-programming
The problem given could be stated as: we have tokens "1", "2", "3", ... "26", and we are given a text which consists of arbitrarily many tokens concatenated together. How many possible lexes are there?
For example, "1234" could lex as "1 2 3 4", or "1 23 4", ... | {
"domain": "codereview.stackexchange",
"id": 32805,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c#, programming-challenge, recursion, dynamic-programming",
"url": null
} |
geophysics
The article mentioned in the comments can provide you with estimated temperatures at important discontinuities inside the earth. Connect these with constant gradients, or find an alternative model temperature profile.
You should be able to find some specific heat capacity measurements for periodite (mantle)... | {
"domain": "physics.stackexchange",
"id": 94383,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "geophysics",
"url": null
} |
c++, c++14
for (const auto &s : strings) {
if (regex_match(s, matches, pattern)) {
if (matches[1].matched) {
// Capture group 1 matches, so this is R23C55 format
string numericRow = matches[1].str();
string numericColumn = matches[2].str();
}
else {
... | {
"domain": "codereview.stackexchange",
"id": 20607,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c++, c++14",
"url": null
} |
electrochemistry, redox
&+ \frac{\Delta_r C_P}{2F} \left[T\ln\frac{T}{T^\Theta} - (T - T^\Theta)\right] \hspace{3 cm} (3) \\
\end{align}
Eq. (3) is very general. The only restriction is that we assume the specific heat capacites independent of temperature. The following data (see references) is useful for evaluating E... | {
"domain": "chemistry.stackexchange",
"id": 17377,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "electrochemistry, redox",
"url": null
} |
image, apl
Thus, l rad← should be written as (l rad)← and x y← should be (x y)←
Reverse order of variable names instead of reversing the data
x y←⌽ can be simplified to y x←.
Avoid unnecessary trains
Sometimes a plain explicit expression does the trick: (⌊0.5+⊢) can simply be ⌊0.5+ which will also run faster.
Function... | {
"domain": "codereview.stackexchange",
"id": 42039,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "image, apl",
"url": null
} |
The result matches how I would code it yet the derivation just does not seem right.
• $\sigma(X)$ will transform each element $X_{i,j}$ to $\sigma(X_{i,j})$. So taking the derivative with respect to $X$ means taking the derivative of each $\sigma(X_{i,j})$ with respect to $X_{i,j}$ where $X_{i,j}$ is a scalar. Your de... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9845754476918605,
"lm_q1q2_score": 0.8225965836325482,
"lm_q2_score": 0.8354835432479661,
"openwebmath_perplexity": 978.9613359347396,
"openwebmath_score": 0.9913309216499329,
"tag... |
nlp, stanford-nlp, vector-space-models, ngrams
Title: Why is n-grams language independent? I don't understand how n-grams are language independent. I've read that by using character n-grams of a word than the word itself as dimensions of a vector space model, we can skip the language-dependent pre-processing such as s... | {
"domain": "datascience.stackexchange",
"id": 7382,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "nlp, stanford-nlp, vector-space-models, ngrams",
"url": null
} |
homework-and-exercises, electricity, home-experiment, conductors
There is no galvanic insulation, there is no hollow wire, the terminals are not insulated by a hollow construction. The full mains voltage is in contact with the water.
The green yellow earth wire provides protection against cases when the conductivit... | {
"domain": "physics.stackexchange",
"id": 32244,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "homework-and-exercises, electricity, home-experiment, conductors",
"url": null
} |
c++, performance, c++11, reinventing-the-wheel, classes
/* This operator is used as
MonoImage MonoImage1(100, 100);
MonoImage MonoImage2(100, 100);
MonoImage2 = MonoImage1++;
*/
MonoImage operator++(int)
{
auto output = MonoImage(this->image_si... | {
"domain": "codereview.stackexchange",
"id": 40327,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c++, performance, c++11, reinventing-the-wheel, classes",
"url": null
} |
• Why does this have anything to do with the CLT, which concerns the asymptotic distribution of means of large numbers of iid values?
– whuber
Aug 11, 2019 at 17:43
• I like the connection you originally made with CLT. Let $n$ be the number of samples to be added (or subtracted) from the original uniform distribution. ... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9553191309994467,
"lm_q1q2_score": 0.8194422789214453,
"lm_q2_score": 0.8577681031721325,
"openwebmath_perplexity": 272.6822410066029,
"openwebmath_score": 0.7277336120605469,
"tag... |
python, parsing
I don't like the way you handle the special case of the root node. In particular, having a non-uniform tuple length is asking for trouble — it is basically data that is not of the same type. I would avoid making the root node part of the data structure altogether, so that you don't have to write an e... | {
"domain": "codereview.stackexchange",
"id": 27557,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, parsing",
"url": null
} |
graphs, np-hard, minimum-spanning-tree
Claim: There exists a hamiltonian path in $G$ if and only if the bipartite graph has a subtree of weight $2|B|$ in which every vertex in $B$ has degree exactly $2$.
Proof: (->) Suppose $h: (v_1,\dotsc,v_n)$ be the hamiltonian path in graph $G$. Let $e_{i}$ denote the edge $(v_{i}... | {
"domain": "cs.stackexchange",
"id": 18976,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "graphs, np-hard, minimum-spanning-tree",
"url": null
} |
standard-model, higgs
The model is called standard because it describes the grand majority of existing data and has been predictive of new phenomena, as the discovery of the Higgs boson.
The standard model lagrangian develops a quantum field theory of interactions for these particles, the measurable quantities definin... | {
"domain": "physics.stackexchange",
"id": 40790,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "standard-model, higgs",
"url": null
} |
mass-energy
Title: How can mass be changed into energy? I asked this question because of Einstein's equation, he derived an equation saying that solid things are packed ENERGY. So lets think that solid is energy,then why we are not using it for our purposes? It means that we are surrounded by energy and only need is t... | {
"domain": "physics.stackexchange",
"id": 25918,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "mass-energy",
"url": null
} |
electromagnetism, special-relativity, forces, inertial-frames, observers
$$F_{\rm rest} = e\vec{E}_{\rm rest} = \frac{e^2}{4\pi \epsilon_0 r^2}\hat{r} ,$$ where $\vec{E}_{\rm rest}$ is the E-field of a stationary proton.
In the lab frame, the electric field in the direction between the two protons is increased by the ... | {
"domain": "physics.stackexchange",
"id": 37279,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "electromagnetism, special-relativity, forces, inertial-frames, observers",
"url"... |
interference
Title: Newton's Ring Experiment In Newton's ring experiment, it is said that the Newton's ring experiment is used to explain this phenomena as depicted in the image.
Now, the interference pattern here is forming on the surface of the lens itself.
But here in this case the reflected rays will meet and in... | {
"domain": "physics.stackexchange",
"id": 9618,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "interference",
"url": null
} |
ros, synchronization, message-filters, timesynchronizer
Original comments
Comment by Thomas on 2012-09-05:
Can you post a miminal excerpt of your program showing how is your main loop? If ctrl+z do not have any effect, then you probably do not look for ros::ok() enough and you may have spin issues which prevent the ca... | {
"domain": "robotics.stackexchange",
"id": 10902,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "ros, synchronization, message-filters, timesynchronizer",
"url": null
} |
# Is Integral is considered defined even when one method gives defined results and other undefined results
something that I found confusing me. Lets see for example the follow integral:
$$\int_{A}^{B}e^{t\cdot x} \cdot dx=\left[\frac{e^{t\cdot x}}{t}\right]_{A}^B=\frac{e^{t\cdot B}-e^{t\cdot A}}{t}$$
From this resul... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.967899295134923,
"lm_q1q2_score": 0.8127779134697771,
"lm_q2_score": 0.8397339656668287,
"openwebmath_perplexity": 208.55329833861424,
"openwebmath_score": 0.976905345916748,
"tags... |
algorithms, time-complexity, dynamic-programming
will get a bigger penalty $5^2 + 0^2 = 25$ than
a.bb..
ccc...
which has only a penalty of $2^2 + 3^2 = 13$.
You can actually partially prove that this will give us a balanced solution.
If you fixate the number of lines, than also the number of necessary extra spaces is... | {
"domain": "cs.stackexchange",
"id": 15646,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "algorithms, time-complexity, dynamic-programming",
"url": null
} |
of Mathematical Model ↓ Interpretation of Solution 1. Except Navier-Stokes equation, are there any other interesting open problems in partial differential equations? I want to know the collection of problems, which are easy to understand but difficult to solve. 4: Separable Equations and Applications Definition 2. ch00... | {
"domain": "vievimilano.it",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9763105314577313,
"lm_q1q2_score": 0.8156913821326103,
"lm_q2_score": 0.8354835432479661,
"openwebmath_perplexity": 628.559223201776,
"openwebmath_score": 0.4513215720653534,
"tag... |
# Correct way of finding $\delta$ for $\lim_{x \to a} \sqrt{x} = \sqrt{a}$
Prove: $\lim_{x \to a} \sqrt{x} = \sqrt{a}$ using $\epsilon$-$\delta$.
My solution:
We have that $0 < |x-a| < \delta$.
Also, $|\sqrt{x} - \sqrt{a}| < \epsilon$
$\therefore -\epsilon < \sqrt{x} - \sqrt{a} < \epsilon$
$\therefore \sqrt{a} -\... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9787126469647338,
"lm_q1q2_score": 0.8155853245099143,
"lm_q2_score": 0.8333245994514082,
"openwebmath_perplexity": 228.41666587686126,
"openwebmath_score": 0.9444648027420044,
"ta... |
Cheers,
Paul
68. Hi Paul,
Thank you very much. Now, the angle is between the string and Y-axis. Is that right?
1. Hi Sandy,
That's exactly right.
Cheers,
Paul
69. Hi paul, we just built a replica with 12 pendulum and add a link to this blog, here the preliminary test. http://youtu.be/MtCZG9sd7mk,
1. Congratulatio... | {
"domain": "blogspot.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9925393578601738,
"lm_q1q2_score": 0.8313707785260579,
"lm_q2_score": 0.837619961306541,
"openwebmath_perplexity": 880.1129026177096,
"openwebmath_score": 0.627366840839386,
"tags": nul... |
boost
Originally posted by ICodeRaven on ROS Answers with karma: 76 on 2011-07-06
Post score: 1
Original comments
Comment by tfoote on 2011-07-18:
Related post http://answers.ros.org/question/996/boost-symbols-not-found?answer=1689#1689
If there's a specific package broken please file tickets for the specific packag... | {
"domain": "robotics.stackexchange",
"id": 6048,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "boost",
"url": null
} |
• Comments are not for extended discussion; this conversation has been moved to chat. – quid Apr 13 '19 at 10:41
• "The common underlying error is that you replaced part of a limit expression with its limit, which is in general invalid!" Definitely Wrong argument. Because, all limit rules are "invalid generally". You c... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9895109102866639,
"lm_q1q2_score": 0.8839394084710241,
"lm_q2_score": 0.8933094110250331,
"openwebmath_perplexity": 575.1508586668708,
"openwebmath_score": 0.9431429505348206,
"tag... |
reinforcement-learning, q-learning, monte-carlo-methods
return policy
This algorithm computes the $Q(s, a)$ for all state action value pairs that the policy follows. If $\pi$ is a random policy, and after running through this algorithm, and for each state take the $\max Q(s,a)$ for all possible actions, why would tha... | {
"domain": "ai.stackexchange",
"id": 1643,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "reinforcement-learning, q-learning, monte-carlo-methods",
"url": null
} |
quantum-information, quantum-entanglement, particle-physics, quantum-teleportation
only if $\hat x_-$ and $\hat p_+$ both have big fluctuations.
The Bell measurement
The bell measurement is a simultaneous measure of $\hat x_m=\hat x_a-\hat x_a'$ and $\hat p_m=\hat p_a+\hat p_a'$. This measurement is possible because b... | {
"domain": "physics.stackexchange",
"id": 4990,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-information, quantum-entanglement, particle-physics, quantum-teleportation"... |
python, python-3.x
As we are handling each file one at a time we will have to split the remaining of XML_cleaner into two functions.
One that cleans up the zip files, and another that will handle the single path passed to it.
This means that after we have completed walk_through_folders, we will need to call zip_files(... | {
"domain": "codereview.stackexchange",
"id": 14701,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, python-3.x",
"url": null
} |
No problem to show that $$\sum_{k=0}^\infty \left(\left(\frac{15}{22}\right)^n -a_n\right)=\frac{22}{7}-\pi\gt 0$$
• Does this series have all terms positive? – Jaume Oliver Lafont Feb 15 '16 at 23:42
• From a certain range, yes. – Piquito Feb 15 '16 at 23:48
• How can we prove $\frac{22}{7}-\pi>0$ from that series if... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9863631627142339,
"lm_q1q2_score": 0.8621575909869775,
"lm_q2_score": 0.8740772400852111,
"openwebmath_perplexity": 1067.6727638975726,
"openwebmath_score": 0.9999915361404419,
"ta... |
rational function a function of the form $$f(x)=p(x)/q(x)$$, where $$p(x)$$ and $$q(x)$$ are polynomials
ratio test for a series $$\displaystyle \sum^∞_{n=1}a_n$$ with nonzero terms, let $$\displaystyle ρ=\lim_{n→∞}|a_{n+1}/a_n|$$; if $$0≤ρ<1$$, the series converges absolutely; if $$ρ>1$$, the series diverges; if $$ρ=1... | {
"domain": "libretexts.org",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9854964207345893,
"lm_q1q2_score": 0.8034087069589012,
"lm_q2_score": 0.8152324960856175,
"openwebmath_perplexity": 141.3882769672332,
"openwebmath_score": 0.9248999357223511,
"ta... |
c, file, memory-management, unix, posix
return n;
}
static char *allocline(char *buf, off_t size, char **next)
{
char *ln, *end;
end = memchr(buf, '\n', size);
if (end == NULL)
return NULL; /* programmer error */
#define LENGTH ((end) - (buf) + 1)
ln = malloc(LENGTH + 1);
if (ln == ... | {
"domain": "codereview.stackexchange",
"id": 21474,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c, file, memory-management, unix, posix",
"url": null
} |
deep-learning, tensorflow
Title: Tensorflow, how many layers does this model have? I'm very new to machine learning and I'm not sure about Tensorflow implementation of neural network model. How many layers does the model below have?
model = Sequential()
model.add(Dense(200, activation="tanh"))
model.add(Dropo... | {
"domain": "datascience.stackexchange",
"id": 10037,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "deep-learning, tensorflow",
"url": null
} |
machine-learning, neural-network, scikit-learn, mlp, dropout
accumulated_loss = 0.0
for batch_slice in gen_batches(n_samples, batch_size):
if self.shuffle:
X_batch = _safe_indexing(X, sample_idx[batch_slice])
y_batch = y[sample_idx[bat... | {
"domain": "datascience.stackexchange",
"id": 11368,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "machine-learning, neural-network, scikit-learn, mlp, dropout",
"url": null
} |
newtonian-mechanics, angular-momentum, string, home-experiment
################################################################################
### Visualize trajectory ###
################################################################################
import numpy as np
from matplotlib import pyplot as plt
from mat... | {
"domain": "physics.stackexchange",
"id": 65639,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "newtonian-mechanics, angular-momentum, string, home-experiment",
"url": null
} |
regression, random-forest, r-squared
# Perform grid search to find the best hyperparameters
grid_search.fit(X_train, y_train)
# Get the best hyperparameters
rf_best_params = grid_search.best_params_
# Create and train the Random Forest model with the best hyperparameters
best_rf_model = RandomForestRegressor(random_... | {
"domain": "datascience.stackexchange",
"id": 12062,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "regression, random-forest, r-squared",
"url": null
} |
python, datetime, python-2.x, json, console
unjson_file.close()
return self.data
except ValueError:
self.data = {}
return self.data
def save_data(self, data, filename):
# takes variable dict and target file arguments
self.data = data
self.filename = ... | {
"domain": "codereview.stackexchange",
"id": 9784,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, datetime, python-2.x, json, console",
"url": null
} |
genome, assembly, k-mer
Model for kmer plot on the left
Formula: y_transform ~ x^transform_exp * length * predict2_0(r1, k, d,
kmercov, bias, x)
Parameters:
Estimate Std. Error t value Pr(>|t|)
d 4.019e-02 1.262e-03 31.84 <2e-16 ***
r1 1.014e-02 1.664e-04 60.94 <2e-16 ***
kmerco... | {
"domain": "bioinformatics.stackexchange",
"id": 2014,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "genome, assembly, k-mer",
"url": null
} |
newtonian-mechanics, orbital-motion, vectors, inertial-frames, celestial-mechanics
was derived in my book confused me. If I put my origin at the center of mass, then the position vectors of $m_1$ and $m_2$ relative to the center of mass are $-\frac{m_2}{m_1 + m_2} \mathbf{r}$ and $\frac{m_1}{m_1 + m_2} \mathbf{r}$ res... | {
"domain": "physics.stackexchange",
"id": 69896,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "newtonian-mechanics, orbital-motion, vectors, inertial-frames, celestial-mechanics... |
human-biology, neuroscience, pathology
Title: What evidence gives clues to the physiological basis for conversion disorder? Conversion disorder has a set of DSM diagnosis criteria, which, among other things, includes ruling out all neurological disease.
However, as the media has shown us (and one could argue a biased ... | {
"domain": "biology.stackexchange",
"id": 256,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "human-biology, neuroscience, pathology",
"url": null
} |
error-correction, stabilizer-code
g_6&IIIIIII,XIXIXIX\\
g_7&IIIZZZZ,IIIIIII\\
g_8&IZZIIZZ,IIIIIII\\
g_9&ZIZIZIZ,IIIIIII\\
g_{10}&IIIIIII,IIIZZZZ\\
g_{11}&IIIIIII,IZZIIZZ\\
g_{12}&IIIIIII,ZIZIZIZ\\
g_{13}&ZZZZZZZ,ZZZZZZZ
\end{array}
$$
Since the $X$ and $Z$ sectors of the stabilizer separate we see that the code is a C... | {
"domain": "quantumcomputing.stackexchange",
"id": 4331,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "error-correction, stabilizer-code",
"url": null
} |
c++, algorithm, pathfinding, breadth-first-search, framework
/*******************************************************************************
* Returns a proxy iterator over a node's parent nodes. *
*******************************************************************************/
DirectedGraphNo... | {
"domain": "codereview.stackexchange",
"id": 10745,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c++, algorithm, pathfinding, breadth-first-search, framework",
"url": null
} |
quantum-mechanics, electromagnetism, angular-momentum, magnetic-monopoles, dirac-monopole
This leads to the Bohr-Sommerfeld quantization rule
$$ \oint \!L_z ~\mathrm{d}\varphi~\in~h\mathbb{Z} ,$$
which in turn leads to the quantization condition for the angular momentum $L_z$.
Hence both (i) the above semiclassical ar... | {
"domain": "physics.stackexchange",
"id": 32877,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-mechanics, electromagnetism, angular-momentum, magnetic-monopoles, dirac-m... |
thermodynamics
This question has two parts. I don't understand the second part at all. Could somebody explain to me please? What is the roll of temperature of the thermostat here? Is the temperature of the house the same as the temperature of the thermostat? Really confused. Steady state means exactly what you think i... | {
"domain": "physics.stackexchange",
"id": 20828,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "thermodynamics",
"url": null
} |
javascript, jquery, null
First off, an extra level of indentation has crept in here. Let me assume this is just a copy/paste error.
Any chance you could be using classes here instead of prefixed IDs? Best case: a single ID you know in advance. It seems that you assume there's only one match anyways.
jQuery, when it do... | {
"domain": "codereview.stackexchange",
"id": 6555,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "javascript, jquery, null",
"url": null
} |
ruby, beginner, file-system
def find_empties_sorted(directory, dirprefix, fsuffix)
empties = find_empties(directory, dirprefix, fsuffix)
nums = Hash.new
non_numeric = Array.new
empties.each do |x|
# if starts with digits, trim leading zeroes and extract; else, nothing
num = x.sub(/^#{Regexp.escape dirp... | {
"domain": "codereview.stackexchange",
"id": 6338,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "ruby, beginner, file-system",
"url": null
} |
electric-circuits, electric-current, electrical-resistance
In space, there is no atmosphere, so convection doesn't work for cooling. But there's still conduction and radiation.
Conduction basically just means that if you leave your spacecraft somewhere far away from any heat source, or in an area of uniform heat sourc... | {
"domain": "physics.stackexchange",
"id": 36398,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "electric-circuits, electric-current, electrical-resistance",
"url": null
} |
python
Title: Python making call list for C++ executable I have a text file which contains configuration values that are intended to be arguments to a C++ executable (to be read in as a vector in C++). I am using a Python script to read in the text file and then call the C++ executable as a subprocess. The reason I'm ... | {
"domain": "codereview.stackexchange",
"id": 29934,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python",
"url": null
} |
neural-networks, training
Additional you can add kernel regularizes to your dense layers which also helps to prevent over training. I have a lot of plots similar to yours and adding dropout and regularization had no effect on validation accuracy. | {
"domain": "ai.stackexchange",
"id": 1757,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "neural-networks, training",
"url": null
} |
astronomy, universe, curvature
Ref. Hitchhiker's Guide to the Galaxy: The 'Triganic Pu' is a
Monetary unit. Its exchange rate of eight Ningis to one Pu is simple
enough, but since a Ningi is a triangular rubber coin six thousand
eight hundred miles along each side, no one has ever collected enough
to own one P... | {
"domain": "physics.stackexchange",
"id": 3026,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "astronomy, universe, curvature",
"url": null
} |
navigation, ekf, robot-localization, ekf-localization, ekf-localization-node
Title: Using Robot localisation without odometry values
I am looking to use the EKF node of the Robot localization package to localize my quadcopter but I do not have a odometry sensor on my robot. I have the following - Pose values obtained... | {
"domain": "robotics.stackexchange",
"id": 22851,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "navigation, ekf, robot-localization, ekf-localization, ekf-localization-node",
... |
reinforcement-learning
Is my understanding of these parameters also correct?
Edit Sometime after the answer was accepted I found an additional source, a video which might be helpful for beginners - MC Simmulations: 3.5 Importance Sampling
Edit As @avejidah said in the comment to his answer "$1/N$ is used to average t... | {
"domain": "datascience.stackexchange",
"id": 5636,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "reinforcement-learning",
"url": null
} |
electronic-configuration, reference-request, machine-learning
I have found a review from 2003 which discusses some more chemically motivated methods of defining molecular similarity and some methods based on a graph representation of the molecule[1]. They also discuss a similarity measure based on the overlap a field.... | {
"domain": "chemistry.stackexchange",
"id": 13024,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "electronic-configuration, reference-request, machine-learning",
"url": null
} |
the first order and of the first degree can be expressed in the form Mdx + Ndy = 0, where M and N are both functions of x and y or constants. Differential EquationsDifferential Equations - Runge Kutta Method, \dfrac{dy}{dx} + y^2 x = 2x \\\\ But first: why? Definition An expression of the form F(x,y)dx+G(x,y)dy is calle... | {
"domain": "repaska.sk",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9863631639168355,
"lm_q1q2_score": 0.8064253470760119,
"lm_q2_score": 0.8175744761936437,
"openwebmath_perplexity": 465.0144024179769,
"openwebmath_score": 0.8547573089599609,
"tags": nul... |
gazebo, kinect, roslaunch, ccny-rgbd, pr2
Original comments
Comment by Ivan Dryanovski on 2013-02-26:
Are you sure /head_mount_kinect/rgb/image_raw is a debayered RGB image in 8UC3?
Comment by astaranowicz on 2013-02-26:
I'm not sure, however, to move from a simulated Gazebo image to a real Image, the use of cv_bridge... | {
"domain": "robotics.stackexchange",
"id": 13056,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "gazebo, kinect, roslaunch, ccny-rgbd, pr2",
"url": null
} |
quantum-mechanics, operators, quantum-information, quantum-measurements
a scalar multiple of another, introduces some trivial redundancies in the resulting probability distributions. You could imagine that the different elements correspond to different physical outcomes though. Consider for example a measurement strat... | {
"domain": "physics.stackexchange",
"id": 96275,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-mechanics, operators, quantum-information, quantum-measurements",
"url":... |
gauge-theory, notation, differentiation, commutator, yang-mills
&=\partial_{\mu}\partial_{\nu} - \partial_{\mu}ig/2\sigma^iA^i_{\nu} - ig/2\sigma^iA^i_{\mu}\partial_{\nu}+i^2g^2/4\sigma^iA^i_{\mu}\sigma^iA^i_{\nu} \\
&- \partial_{\nu}\partial_{\mu}+\partial_{\nu}ig/2\sigma^iA^i_{\mu}+ig/2\sigma^iA^i_{\nu}\partial_{\mu... | {
"domain": "physics.stackexchange",
"id": 55056,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "gauge-theory, notation, differentiation, commutator, yang-mills",
"url": null
} |
$r=\frac{\sum_{i=1}^{n}(x_i-\bar{x})(y_i-\bar{y})}{\sqrt{\sum_{i=1}^{n}(x_i-\bar{x})^2\sum_{i=1}^{n}(y_i-\bar{y})^2}}$
If x is the height of an individual measured in inches and y is the weight of the individual measured in pounds, then the units for the numerator is inches × pounds. Similarly, the units for the denom... | {
"domain": "psu.edu",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9905874084672535,
"lm_q1q2_score": 0.8189302978670583,
"lm_q2_score": 0.8267117983401363,
"openwebmath_perplexity": 389.9993439053208,
"openwebmath_score": 0.7885005474090576,
"tags": null,
... |
homework-and-exercises, general-relativity, kaluza-klein
and
$$ \frac{\mathrm{d}}{\mathrm{d}\tau}\ln\left(c\frac{\mathrm{d}\tau}{\mathrm{d}s}\right) = \frac{\mathrm{d}s}{\mathrm{d}\tau}\frac{\mathrm{d}^2\tau}{\mathrm{d}s^2}$$
and therefore
$$ \frac{\mathrm{d}\tilde{U}^\mu}{\mathrm{d}\tau} = \frac{\mathrm{d}U^\mu}{\mat... | {
"domain": "physics.stackexchange",
"id": 27998,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "homework-and-exercises, general-relativity, kaluza-klein",
"url": null
} |
particle-physics, symmetry, models, unified-theories
Now, in reality, there's a difference between what I've called the "apparent symmetry group," seen by a person moving around in the space, and the "actual symmetry group." The actual symmetry group of the lattice is still $\mathbb{R}$. This involves moving the whole... | {
"domain": "physics.stackexchange",
"id": 77051,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "particle-physics, symmetry, models, unified-theories",
"url": null
} |
condensed-matter, solid-state-physics, crystals, phonons
$$R_{b\to a}=\frac{2\pi}{\hbar}\left|\langle a|H_p|b\rangle\right|^2\rho$$
where $\rho$ is the density of states. Those transitions are phonon-phonon scattering.
$H_p$ has other effects too; e.g. it'll change the energy levels a little. However, that's usually n... | {
"domain": "physics.stackexchange",
"id": 11184,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "condensed-matter, solid-state-physics, crystals, phonons",
"url": null
} |
ros-hydro
add_executable(inv_node src/inv_node.cpp)
target_link_libraries(inv_node ${catkin_LIBRARIES})
add_dependencies(inv_node inv_node_gencpp)
Originally posted by JonasG on ROS Answers with karma: 1 on 2018-06-04
Post score: 0
you need to find_package moveit_ros_planning (this is where the rdf_loader is located... | {
"domain": "robotics.stackexchange",
"id": 30966,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "ros-hydro",
"url": null
} |
optics, laser
fields, they refer to which approximation one can get away with. Even the linear polarised LG beam cannot have a perfectly uniform polarisation - the only field that can have this is a plane wave - so, depending on the accuracy needed in simulation, you may have to model this field as a fully vector phen... | {
"domain": "physics.stackexchange",
"id": 16541,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "optics, laser",
"url": null
} |
ros2, rviz
[robot_state_publisher-2] Link drivewhl_rr_link had 0 children
[robot_state_publisher-2] [INFO] [1628881997.684661614] [robot_state_publisher]: got segment base_footprint
[robot_state_publisher-2] [INFO] [1628881997.684822903] [robot_state_publisher]: got segment base_link
[robot_state_publisher-2] [INFO] [... | {
"domain": "robotics.stackexchange",
"id": 36797,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "ros2, rviz",
"url": null
} |
vba, file-system, wrapper
Private Function AttributeArguments() As String
If AttributeFlags = SortOrder.Default Then
AttributeArguments = vbNullString
Exit Function
End If
With New Scripting.Dictionary
If mAttribs And HiddenFiles Then .Add "h", vbNull
If mAttribs And NonHid... | {
"domain": "codereview.stackexchange",
"id": 21776,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "vba, file-system, wrapper",
"url": null
} |
performance, c, image
Title: Rapid color replacement for in-memory BMP A function that relatively quick replaces one color with another, in a memory-buffered BMP.
I am trying to improve the performance as much as it is possible. The previous implementation of this function was even faster.. but then I ran into some pa... | {
"domain": "codereview.stackexchange",
"id": 12112,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "performance, c, image",
"url": null
} |
So we can conclude that n=even and even numbers are always divisible by 2. --Sufficient
I hope that clears your doubt !!
_________________
Kudos if my post helps!
Long And A Fruitful Journey - V21 to V41; If I can, So Can You!!
My study resources:
1. Useful Formulae, Concepts and Tricks-Quant
2. e-GMAT's ALL SC Com... | {
"domain": "gmatclub.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9449947086083138,
"lm_q1q2_score": 0.8259983497465878,
"lm_q2_score": 0.8740772220439509,
"openwebmath_perplexity": 4768.193114812097,
"openwebmath_score": 0.49131280183792114,
"tags": ... |
classical-mechanics, harmonic-oscillator, calculus, approximations, anharmonic-oscillators
Title: Rigorously prove the period of small oscillations by directly integrating This answer proved that
$$\lim_{E\to E_0}2\int_{x_1}^{x_2}\frac{\mathrm dx}{\sqrt{2\left(E-U\!\left(x\right)\right)}}=\frac{2\pi}{\sqrt{U''\!\left(... | {
"domain": "physics.stackexchange",
"id": 91655,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "classical-mechanics, harmonic-oscillator, calculus, approximations, anharmonic-osc... |
pressure, fluid-statics
Thus, I can put it anywhere in the tank if it contains a gas.
The second case would be if the tank contains a liquid, especially when the tank is large. In this situation, the decision that seems more logical to me is to put the pressure gauge in the bottom of the tank. However, in all the pla... | {
"domain": "physics.stackexchange",
"id": 77428,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "pressure, fluid-statics",
"url": null
} |
python, python-3.x
if os.path.isfile('Cleaner_Script_Config.cfg')== True:
configreader = ConfigObj('Cleaner_Script_Config.cfg')
How_Old_To_Delete_In_Days = configreader.get('How_Old_To_Delete_In_Days')
How_Old_To_Zip_In_Days = configreader.get('How_Old_To_Zip_In_Days')
Folders_To_Clean = os.path.join(... | {
"domain": "codereview.stackexchange",
"id": 14701,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, python-3.x",
"url": null
} |
matlab, fft, estimation, motion
Normalized Cross Power Spectrum
To create an upscaled version of the normalized cross-power spectrum, we follow exactly what is written in the paper
Calculate the centered fourier transform of fData and gData into f and g
Conjugate g
Calculate f*g/Norm[f*g]
Pad the result by a factor k... | {
"domain": "dsp.stackexchange",
"id": 4883,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "matlab, fft, estimation, motion",
"url": null
} |
c#
var transformLocateMethod =
typeof(TransformUtilities)
.GetMethod("GetTransformedMethod", BindingFlags.NonPublic | BindingFlags.Static);
var transformMethod = (MethodInfo)transformLocateMethod.MakeGenericMethod(new Type[] { result.GetType() }).Invoke(null, null);
return transformMethod... | {
"domain": "codereview.stackexchange",
"id": 25511,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c#",
"url": null
} |
Again: $$f(x)$$ is assumed to be everywhere differentiable; we pick $$x_0$$. By the Intermediate Value Theorem, for every $$x\neq x_0$$, there exists $$\xi_x$$ between $$x$$ and $$x_0$$ such that $$f'(\xi_x) = \frac{f(x)-f(x_0)}{x-x_0}.\tag{1}$$ Using AC, we define a function $$g\colon \mathbb{R}\to \mathbb{R}$$ by $$g... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9416541593883189,
"lm_q1q2_score": 0.8077209004307669,
"lm_q2_score": 0.8577681013541611,
"openwebmath_perplexity": 80.96758952931077,
"openwebmath_score": 0.9359080791473389,
"tag... |
rosbag
Originally posted by jarvisschultz with karma: 9031 on 2016-06-23
This answer was ACCEPTED on the original site
Post score: 2
Original comments
Comment by ROSkinect on 2016-06-28:
Yes you are right it works better but still don't get all the msg | {
"domain": "robotics.stackexchange",
"id": 25034,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "rosbag",
"url": null
} |
c#, winforms
Title: How to write this code without using 11 if-statements? if (progressBar1.Value == 1) { progressLabel.Text = "1%"; }
if (progressBar1.Value == 10) { progressLabel.Text = "10%"; }
if (progressBar1.Value == 20) { progressLabel.Text = "20%"; }
if (progressBar1.Value == 30) { progressLabel.Text = "30%"; ... | {
"domain": "codereview.stackexchange",
"id": 4522,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c#, winforms",
"url": null
} |
optics, visible-light, photons, quantum-optics, hydrogen
Title: How can hydrogen spectrum be monomode (focusing on the lowest emission band)? Consider you have an hydrogen atom. This atom can emit light under spontaneous emission for example, but the light it will emit will only be at some very specific frequencies: h... | {
"domain": "physics.stackexchange",
"id": 63821,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "optics, visible-light, photons, quantum-optics, hydrogen",
"url": null
} |
general-relativity, spacetime, speed-of-light, time-dilation, gravitational-lensing
Please see here:
https://en.wikipedia.org/wiki/Four-vector
Now in the Shapiro effect, you are asking whether the time dilation or the curvature component is more dominant.
The answer is that the time dilation component is more dominant... | {
"domain": "physics.stackexchange",
"id": 58154,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "general-relativity, spacetime, speed-of-light, time-dilation, gravitational-lensin... |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.