text stringlengths 49 10.4k | source dict |
|---|---|
Landing On Heads. The coin is flipped 50 times. Probability Versus Physics. A coin is biased so that the probability that it shows heads on any one throw is p. I want it to start by having a dollar amount of x. A coin flip with Wendy's coin shows head with probability$\frac {1} {100}$. 6 that an "unfair" coin will turn... | {
"domain": "rciretedimpresa.it",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9838471613889295,
"lm_q1q2_score": 0.8066497311802325,
"lm_q2_score": 0.8198933359135361,
"openwebmath_perplexity": 454.996892519576,
"openwebmath_score": 0.7294924855232239,
"tag... |
ruby, calculator
completed (Y|n):
Div Method
Create a div method that computes the consecutive divisions in the expression
- detail: The method will return the final quotient of the numbers
- detail: it will raise an exception if the expression contains the number 0
- example: "2,1" computes to 2
... | {
"domain": "codereview.stackexchange",
"id": 4932,
"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, calculator",
"url": null
} |
Now, we are also given:
{eq}\begin{align} W_h\ &=\ mg_h\\[0.3 cm] g_h\ &=\ \dfrac{W_h}{m}\\[0.3 cm] g_s\left (1-\dfrac{2h}{R}\right )\ &=\ \dfrac{24.31\ \rm N}{75.0\ \rm kg}\\[0.3 cm] \left (1-\dfrac{2h}{R}\right )\ &=\ \dfrac{0.324\ \rm m/s^2}{g_s}\\[0.3 cm] \left (1-\dfrac{2h}{R}\right )\ &=\ \dfrac{0.324\ \rm m/s^2... | {
"domain": "study.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9793540704659682,
"lm_q1q2_score": 0.8118245940274381,
"lm_q2_score": 0.8289388062084421,
"openwebmath_perplexity": 9788.634218913056,
"openwebmath_score": 0.9786102175712585,
"tags": ... |
ros, gazebo, px4, ros-kinetic, mavros
Title: Error during mavros Multi-Vehicle Simulation with px4 in Gazebo
I followed the instruction as mentioned here. Everything worked fine but at last stage when I try to run:-
roslaunch px4 multi_uav_mavros_sitl.launch
I get following:-
... logging to /home/yograj/.ros/log/e34... | {
"domain": "robotics.stackexchange",
"id": 29951,
"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, gazebo, px4, ros-kinetic, mavros",
"url": null
} |
proof-techniques, formal-methods, software-verification
The current state of play is that most programming languages lack publically available, normative (mechanized!) formal models let alone the underlying hardware. Ipso facto, most standard libraries, applications, operating systems, drivers, etc. are not proven cor... | {
"domain": "cs.stackexchange",
"id": 11482,
"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": "proof-techniques, formal-methods, software-verification",
"url": null
} |
spacetime, string-theory, spacetime-dimensions, laws-of-physics, string-theory-landscape
Title: How do we know the laws of physics remain the same in different dimensions? Section on Wikipedia dealing with the possibility of different dimensions.
When reading this section it feels like there's a giant elephant in the ... | {
"domain": "physics.stackexchange",
"id": 95876,
"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": "spacetime, string-theory, spacetime-dimensions, laws-of-physics, string-theory-lan... |
From the definition of the floor function we have
[correction here] \begin{align} x^2-1 &< &\lfloor x^2 \rfloor &\le x^2 \\ 3x-1 &< &\lfloor 3x \rfloor &\le 3x \end{align}
and so $$\lfloor x^2 \rfloor - \lfloor 3x \rfloor + 2 > x^2-3x-1+2=x^2-3x+1$$
So all solutions to the floor equation must lie between the two roo... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9790357640753516,
"lm_q1q2_score": 0.8004346519887493,
"lm_q2_score": 0.8175744761936437,
"openwebmath_perplexity": 1272.4479978691918,
"openwebmath_score": 0.9625352621078491,
"ta... |
n f xij, yij DxDy Here is a subroutine called MDOUBLERSUM that calculates the double Riemann sum Sm,n of f x, y over a rectangle R for uniform partitions using the center midpoint of each sub-rectangle as base point, that is, xij = xi-1 +xi 2 =a + i-1 2 Dx and Oftentimes, to evaluate a definite integral directly from i... | {
"domain": "lgc2.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9869795110351222,
"lm_q1q2_score": 0.8137270204482905,
"lm_q2_score": 0.8244619177503205,
"openwebmath_perplexity": 637.926889986448,
"openwebmath_score": 0.9391229748725891,
"tags": nu... |
c#, .net, console
// if the color is set to d (default), then depending on our target,
// set the color to be the default for that target.
if (splits[1] == "d")
if (splits[0][0] == 'b')
consoleColor = defaultBackgroundColor;
... | {
"domain": "codereview.stackexchange",
"id": 13074,
"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#, .net, console",
"url": null
} |
thermodynamics, molecules
Title: Why do methane molecules have 15 degrees of freedom? I've just been learning a little thermal chemistry including the equipartition theorem. As part of this, my textbook discusses how to figure out the degrees of freedom for different chemicals.
The answer to one of the exercises says ... | {
"domain": "chemistry.stackexchange",
"id": 8892,
"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, molecules",
"url": null
} |
We can illustrate the most fundamental property of a Hermitian matrix. The vectors xand ybelow are random, but according to Theorem HMIP the final command should produce Truefor any possible values of these two vectors. (You would be right to think that using random vectors over QQbarwould be a better idea, but at this... | {
"domain": "runestone.academy",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9886682441314384,
"lm_q1q2_score": 0.80129475275188,
"lm_q2_score": 0.8104789018037399,
"openwebmath_perplexity": 552.7782355881624,
"openwebmath_score": 0.9809508919715881,
"tags"... |
fluid-dynamics, ideal-gas, volume
Title: Excluded Volume Calculation in Van der Waals Equation When accounting for the excluded volume for in the Van der Waals equation, it is assumed that the molecules are hard spheres and are of diameter. If we consider a cube of volume V, then we can say that the side of this cube ... | {
"domain": "physics.stackexchange",
"id": 37235,
"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": "fluid-dynamics, ideal-gas, volume",
"url": null
} |
homework-and-exercises, electric-circuits, electrical-resistance, capacitance
Title: Deriving ODE for voltage across capacitor-RC circuit I need to derive an ODE for the voltage across the capacitor in a specific RC circuit. The circuit has 1 resistor, one input, one capacitor and a switch.
So far I have
$$\frac{dv}{... | {
"domain": "physics.stackexchange",
"id": 21818,
"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, electric-circuits, electrical-resistance, capacitance",
... |
java, unit-testing, reinventing-the-wheel
INFO(">"), ERROR("Error -->");
private final String val;
private Logger(String val) {
this.val = val;
}
@Override
public String toString() {
return val;
}
public static void log(Logger level, C... | {
"domain": "codereview.stackexchange",
"id": 9040,
"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, unit-testing, reinventing-the-wheel",
"url": null
} |
forces, visible-light, photons, mass, solar-sails
Title: Momentum exerted on an external object by a Photon I am trying to calculate momentum transferred by a Photon for Solar Sails speed (not exactly a photon because of wave-particle duality but i will consider it a Photon for this Question), So I had the following r... | {
"domain": "physics.stackexchange",
"id": 91701,
"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": "forces, visible-light, photons, mass, solar-sails",
"url": null
} |
ros, pcl, ros-fuerte, ubuntu
Title: Upgrading to PCL 1.6.0 with ROS fuerte Ubuntu 12.04
Hi all,
I am trying to download the latest PCL library so that I can try using their object recognition code, however I can't figure out how to properly install it.
I followed the instruction for compiling from source on the PCL w... | {
"domain": "robotics.stackexchange",
"id": 10380,
"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, pcl, ros-fuerte, ubuntu",
"url": null
} |
regular-languages, automata, finite-automata
Title: Size of intersection of two acyclic DFAs A and B is O(|A|+|B|)? Acyclic DFAs recognize finite languages. For more info, see this Wikipedia page : https://en.wikipedia.org/wiki/Deterministic_acyclic_finite_state_automaton
To explain that the product of two DFAs $A$ an... | {
"domain": "cs.stackexchange",
"id": 8167,
"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": "regular-languages, automata, finite-automata",
"url": null
} |
electromagnetism, fluid-dynamics, waves
Title: Derivation of Alfven wave According to the original paper (Alfven, 1942), I would like to prove his final equation
$$\frac{d^2H'}{dz^2}=\frac{4\pi\partial}{H_0^2}\frac{d^2H'}{dt^2}$$
where $\partial$ denotes the mass density of the liquid, and other notations please see ... | {
"domain": "physics.stackexchange",
"id": 64755,
"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, fluid-dynamics, waves",
"url": null
} |
ros
add_library(rosrect-listener-agent-lib src/backend_api.cpp src/robot_event.cpp src/state_manager.cpp)
target_link_libraries(rosrect-listener-agent-lib ${catkin_LIBRARIES} cpprestsdk::cpprest)
add_executable(rosrect-listener-agent src/listener_agent.cpp )
target_link_libraries(rosrect-listener-agent
${catkin_LIBR... | {
"domain": "robotics.stackexchange",
"id": 35269,
"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",
"url": null
} |
c++, c++11, multithreading
… correct?
Okay, before I start the review, I have to ask… C++11? Really? This is 2023! I would expect, at least, a bare minimum of C++17. That’s the version all major compilers default to. Concurrency support is barely functional in C++11. (It’s still not perfect as of C++20—executors is re... | {
"domain": "codereview.stackexchange",
"id": 45077,
"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++11, multithreading",
"url": null
} |
python, array, multiprocessing
Title: Passing shared memory array to worker pool in Python I'm working with big 2d numpy arrays, and a function that I need to iterate over each row of these arrays.
To speed things up, I've implemented parallel processing using Python's multiprocessing module. Each worker of the pool g... | {
"domain": "codereview.stackexchange",
"id": 32257,
"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, array, multiprocessing",
"url": null
} |
optimization
Title: How can I optimise this bitmask generation algorithm? I am emulating the left shifting of a 128-bit integer using two 64-bit integers. For this I must calculate the bits that need to be moved into the higher portion. I have the following algorithm for generating a bitmask that masks the last until ... | {
"domain": "cs.stackexchange",
"id": 15755,
"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": "optimization",
"url": null
} |
as a textbook by advanced undergraduates and graduate students in stochastic calculus and financial mathematics. For engineering applications, examples of unsteady vertical flows include the interaction of wakes and shocks with the boundary layer in a transonic turbine and vorticity dissipation shed due to the temporal... | {
"domain": "rivoliccr.it",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9780517514031507,
"lm_q1q2_score": 0.8253730772942013,
"lm_q2_score": 0.8438950966654774,
"openwebmath_perplexity": 791.5377248847301,
"openwebmath_score": 0.5360766649246216,
"tags... |
ros, ros-kinetic, depth-image-proc, nodelet
and
rosrun nodelet nodelet load depth_image_proc/register nodelet_manager __name:=step_1 rgb/camera_info:=/camera/color/camera_info depth/camera_info:=/camera/depth/camera_info depth/image_rect:=/camera/depth/image_rect_raw
Edit 2:
I know that the realsense2_camera uses /ca... | {
"domain": "robotics.stackexchange",
"id": 32845,
"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, ros-kinetic, depth-image-proc, nodelet",
"url": null
} |
genetics, population-genetics, mutations
Title: Can the mutation rate vary for individuals of the same species, growing in similar environments? Suppose we consider several populations who originally inherited their genome from the same ancestor, and that we put for a few thousands generations in similar environments.... | {
"domain": "biology.stackexchange",
"id": 11030,
"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": "genetics, population-genetics, mutations",
"url": null
} |
ph, reaction-control, chemical-engineering
Depending on where you are, the conditions must be different.
Note also that the inflection point becomes less obvious when weak acids or bases are involved.
Finally, you might need to integrate also a temperature compensation since, depending on the $\Delta\epsilon$ you ha... | {
"domain": "chemistry.stackexchange",
"id": 10650,
"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": "ph, reaction-control, chemical-engineering",
"url": null
} |
genetics, homework, recombination, genetic-linkage
$p(tr) \times p(tr) = 0.495^2 \approx 0.245$
$0.245 \times 1600 = 392\space\texttt{offspring}$
So it seems that your answer is correct and the given answer is wrong. | {
"domain": "biology.stackexchange",
"id": 11479,
"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": "genetics, homework, recombination, genetic-linkage",
"url": null
} |
signal-detection, radar, doppler
Title: Range-Doppler Matrix Cells I am working on developing an understanding on range-gates and the size of each cell. I haven't had much luck in finding information in how the matrix in the image below is generated, so I have some questions regarding the image below.
.
Let's say I ha... | {
"domain": "dsp.stackexchange",
"id": 10598,
"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": "signal-detection, radar, doppler",
"url": null
} |
fermions, pauli-exclusion-principle, bosons
Title: Fermions in the same state I need some clarification of what is meant when someone says "fermions cannot occupy the same quantum state". Consider two bosons:
$$\psi(\vec{r_1}, s_1, \vec{r_2}, s_2) = \frac{1}{\sqrt{2}} \left( \phi_A(\vec{r_1}, s_1)\phi_B(\vec{r_2}, s_... | {
"domain": "physics.stackexchange",
"id": 9157,
"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": "fermions, pauli-exclusion-principle, bosons",
"url": null
} |
c++, c++11, converting, floating-point
std::string leftDecimal = binary.substr(0, decimalPointIndex);
u32 leftValue = std::stoul(leftDecimal, NULL, 2);
if (iter != binary.cend())
{
rightDecimal = binary.substr(decimalPointIndex+1, binary.size());
while (rightDecimal.size() % 3 != 0)
... | {
"domain": "codereview.stackexchange",
"id": 8875,
"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++11, converting, floating-point",
"url": null
} |
algorithms
Title: How many times can you pour milk among 3 buckets? This is a problem from usaco, which I solved, but I don't know how to estimate the number of times you can pour milk among the jugs, my solutions just uses a big enough number.
Here's the problem statement:
Farmer John has three milking buckets of ca... | {
"domain": "cs.stackexchange",
"id": 6281,
"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",
"url": null
} |
modulation, pll
Is it possible in practice to have a precise 3499700 kHz oscillator?
Define "precise"!
Precise is a relative term. If you build a house, your standard of length needs to be accurate to say 0.2 % (so that if your house is 10m long, its length error will be no more than 2cm). If you build an aircraft e... | {
"domain": "dsp.stackexchange",
"id": 6847,
"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": "modulation, pll",
"url": null
} |
3^{\tfrac{1}{4}}}{1+\sqrt{3}+\sqrt{2}\cdot 3^{\tfrac{1}{4}}}\right) \end{align} | {
"domain": "brilliant.org",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9518632302488963,
"lm_q1q2_score": 0.8383983443917405,
"lm_q2_score": 0.8807970701552505,
"openwebmath_perplexity": 4471.129323603746,
"openwebmath_score": 0.9999955892562866,
"tags": ... |
organic-chemistry, stability, hyperconjugation
Title: Why is 1,2,3,4,5,8-hexahydronaphthalene more stable than 1,4,4a,5,8,8a-hexahydronaphthalene? Why is 1,2,3,4,5,8-hexahydronaphthalene (1) more stable than 1,4,4a,5,8,8a-hexahydronaphthalene (2)?
A follow-up question is about stability being estimated by counting th... | {
"domain": "chemistry.stackexchange",
"id": 14472,
"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, stability, hyperconjugation",
"url": null
} |
filter-design, parks-mclellan
Title: Trying to apply Parks-McClellan optimal FIR filter design My goal is to apply the Remez exchange algorithm in R to design an FIR band pass filter for a specific frequency window. The question is not supposed to be referring to R of course but about how to choose the parameters corr... | {
"domain": "dsp.stackexchange",
"id": 1783,
"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": "filter-design, parks-mclellan",
"url": null
} |
ros, python, array, service
Title: 2D array as service response
I want to use a service that has a 2D array response
this is my .srv file
uint32 a
---
uint32[][] tree
catkin_make error:
genmsg.base.InvalidMsgSpec: invalid field: Currently only support 1-dimensional array types: uint32[][]
Originally posted by Moon... | {
"domain": "robotics.stackexchange",
"id": 24479,
"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, python, array, service",
"url": null
} |
Now, recall that:
Sum of two square theorem
An integer greater than one can be written as a sum of two squares if and only if its prime decomposition contains no prime congruent to 3 (mod 4) raised to an odd power.
By taking $$c=ra$$ and $$d=rb$$, we get that $$\Vert A \Vert^2 = (r^2+1)(a^2+b^2)$$, which is also a su... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. Yes\n2. Yes",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9845754488233528,
"lm_q1q2_score": 0.8920153402813488,
"lm_q2_score": 0.9059898267292559,
"openwebmath_perplexity": 52.77125530895787,
"openwebmath_score": 0.924496591091156,
"tags... |
visible-light, fan
This isn't a camera effect, the colors are even more distinct in person than the camera quality leads to believe.
This effect only occurs on Medium speed and disappears on both Low and High speeds.
If I have the fan on Medium speed and switch it to High, the color effect starts rotating faster in th... | {
"domain": "physics.stackexchange",
"id": 16237,
"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": "visible-light, fan",
"url": null
} |
series. One convenient way to find the sum of the Maclaurin series is to start with a well-known Maclaurin series and then manipulate it one step at a time until it matches the series you’ve been given. Example: Find the Maclaurin series for f(x) = exand determine its radius of convergence. A Maclaurin series is a Tayl... | {
"domain": "cpxlt.cn",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9923043544146899,
"lm_q1q2_score": 0.8353472495190016,
"lm_q2_score": 0.8418256412990657,
"openwebmath_perplexity": 299.1305186664839,
"openwebmath_score": 0.9300989508628845,
"tags": n... |
php, mysql, classes, pdo
Title: Class method to insert a record into MySQL I'm just starting out using OOP; classes and methods etc. I've been looking around for some PDO classes/wrappers out there, but there's not much to choose from. So I've tried to make my own. Started out by writing an "insert" method.
As a man w... | {
"domain": "codereview.stackexchange",
"id": 12594,
"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, mysql, classes, pdo",
"url": null
} |
quantum-mechanics, wavefunction, schroedinger-equation, superposition, linear-systems
With $\hat{H}_1=\frac{\hat{p}^2}{2m}+V_1$ and $\hat{H}_2=\frac{\hat{p}^2}{2m}+V_2$. This looks like the time-independent Schrödinger equation for each solution separately. This derivation rests on claiming $V=V_1+V_2$, but is this al... | {
"domain": "physics.stackexchange",
"id": 95894,
"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, wavefunction, schroedinger-equation, superposition, linear-syst... |
newtonian-mechanics, forces, centripetal-force, angular-velocity
So finally, let's answer your question
Will an object be pulled towards the centre linearly if the net force provided for a circular motion is larger than the required centripetal force? And why?
Assuming by "linearly" you mean with a constant radial s... | {
"domain": "physics.stackexchange",
"id": 65194,
"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, forces, centripetal-force, angular-velocity",
"url": null
} |
homework-and-exercises, forces, newtonian-gravity, estimation, tidal-effect
Now, if we move the Earth to orbit the black hole even closer until the tidal forces on Earth due to the black hole become $\Delta a$ = 10.8 $m/s^2$ and so the metal sphere is pulled by the difference between $\Delta a$ and the Earth's gravita... | {
"domain": "physics.stackexchange",
"id": 28096,
"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, forces, newtonian-gravity, estimation, tidal-effect",
"u... |
virology, protein-interaction
Negative-stain transmission electron micrographs of the C. crescentus phage phiCbK and five phiCbK-like phages. All five exhibit Siphoviridae morphology and prolate heads. Scale bars are 100 nm.
The conical capsids of lentiviruses like HIV have a similar geometry to these corndog phage, ... | {
"domain": "biology.stackexchange",
"id": 11905,
"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": "virology, protein-interaction",
"url": null
} |
ros2
Returns:
error: float
"""
error = error_function(value, set_point)
abs_err = abs(error)
max_error = abs(max_error)
if abs_err <= dead_band:
return 0.0
elif abs_err >= max_error:
if error > 0:
return max_error
... | {
"domain": "robotics.stackexchange",
"id": 35239,
"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",
"url": null
} |
ros, ros-kinetic, roscd
Title: How to make roscd go to ~/catkin_ws/devel instead of /opt/ros/kinetic?
I have sourced the setup.bash in the devel folder of catkin_ws but still the roscd command takes to /opt/ros/kinetic
On env | grep ROS, the output is:
ROS_ROOT=/opt/ros/kinetic/
ROS_PACKAGE_PATH=/home/username/catkin... | {
"domain": "robotics.stackexchange",
"id": 30477,
"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, ros-kinetic, roscd",
"url": null
} |
quantum-mechanics, homework-and-exercises, symmetry, notation
Since $\left[ \hat{x}, \hat{p}_{x}^{n} \right]=i \hbar n \hat{p}_{x}^{n-1}$,
$$ \left[ \hat{x}, \hat{T}(a) \right] = \sum_{n=0}^{\infty} \frac{1}{n!} \left( i \frac{a}{\hbar} \right)^{n} i \hbar n \hat{p}_{x}^{n-1} \\
= - \sum_{n=0}^{\infty} \frac{1}{n!} \... | {
"domain": "physics.stackexchange",
"id": 65027,
"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, homework-and-exercises, symmetry, notation",
"url": null
} |
Hence the correlation coefficient is $\pm\sqrt{aa'}$. But it's also of the same sign as $a$ (or $a'$), hence positive here.
• do you mean the sign of the correlation coefficient is always the same the sign of any one the two regression coefficients ?@Jean-Claude Arbaut – Hussien Mohamed May 22 '18 at 22:47
• @HussienM... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9875683484150417,
"lm_q1q2_score": 0.8097007076246299,
"lm_q2_score": 0.8198933359135361,
"openwebmath_perplexity": 420.7937179117617,
"openwebmath_score": 0.9025993943214417,
"tag... |
roslaunch, turtlebot, ros-kinetic
Originally posted by danny p on ROS Answers with karma: 25 on 2018-09-26
Post score: 2 | {
"domain": "robotics.stackexchange",
"id": 31824,
"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": "roslaunch, turtlebot, ros-kinetic",
"url": null
} |
ros, master
Title: Any use case of communication of nodes on different netowkrs?
I want to know if there are use cases that nodes on different(distributed) networks communicate with each other, using single ROS Master.
It's like:
PC A on Network A: ROS Master and node A(A1, A2...)
PC B on Network B: Node B(B1, B2..... | {
"domain": "robotics.stackexchange",
"id": 23455,
"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, master",
"url": null
} |
ros, 2dlaserscan, laserscanner, pointcloud
Title: Rotating laser mounted on a vehicle
Hi,
I obtained 3d point cloud using 2d rotating laser scanner on a base frame . But now I want to this mounted on a vehicle. How can I do it?
Originally posted by Mekateng on ROS Answers with karma: 85 on 2017-11-23
Post score: 0
... | {
"domain": "robotics.stackexchange",
"id": 29429,
"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, 2dlaserscan, laserscanner, pointcloud",
"url": null
} |
graphs, graph-isomorphism
Step 4: We now have n colorings for both graphs. Deduce if this leads to a
negative. If not, for now assume that the graphs are isomorphic.
A bit of explanation on step 4: Suppose I pick a starting vertex for graph 1, we need to look at each starting vertex for graph 2. If a starting vertex ... | {
"domain": "cs.stackexchange",
"id": 5730,
"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, graph-isomorphism",
"url": null
} |
newtonian-mechanics, classical-mechanics, navier-stokes, fluid-dynamics
Scenario C (seems this is not the case - may be deleted)
if your $T_x$ is a component of a vector torque, then the interesting component to produce rolling directed along the y axis would be the one perpendicular to both the wall surface and the c... | {
"domain": "physics.stackexchange",
"id": 39053,
"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, classical-mechanics, navier-stokes, fluid-dynamics",
"url":... |
javascript, jquery, html, dom
itemUnit = $('<div class="itemUnit"></div>');
itemUnit.append('<p>UOM</p>');
unitSlct = $('<select name="ooItem[' + createNewRow.rc + '][unit]"></select>');
unitSlct.append('<option value="pc">PCS</option>')
.append('<option value="sq">SQ</option>')
.ap... | {
"domain": "codereview.stackexchange",
"id": 4765,
"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, html, dom",
"url": null
} |
equations. Method 1: Graphing Linear Functions in Standard Form 1. Introduction to Linear Relationships: IM 8.3.5. Example 1 Graph the linear function f given by f (x) = 2 x + 4 Solution to Example 1. Graph $f\left(x\right)=\frac{1}{2}x - 3$ using transformations. However, in linear algebra, a linear function is a func... | {
"domain": "co.id",
"id": null,
"lm_label": "1. Yes\n2. Yes",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.983596967483837,
"lm_q1q2_score": 0.8857583575641955,
"lm_q2_score": 0.900529776774399,
"openwebmath_perplexity": 420.482420127325,
"openwebmath_score": 0.5752109885215759,
"tags": null,
"ur... |
custom-message, cmake
Title: ROS Answers SE migration: compiling msg
Hi,
everytime, when I compile my package from scratch,
I have to comment out some lines in my CMakeList.txt
addexecutable(file file.cpp )
target_link_libraries(file {catkin_LIBRARIES} )
Afterwards it can compile my custom msg and then I include th... | {
"domain": "robotics.stackexchange",
"id": 24298,
"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": "custom-message, cmake",
"url": null
} |
shock-waves, laser-interaction
Title: shock waves generated by ultrashort laser pulses I am reading about shock waves and their origin. During my study i have found that the long pulse lasers (nanosecond-miliseconds duration) are used to generate the shock waves in the materials, whereas I have found a little mention ... | {
"domain": "physics.stackexchange",
"id": 30519,
"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": "shock-waves, laser-interaction",
"url": null
} |
c#, wpf, mvvm
public UserControlResult()
{
this.InitializeComponent();
}
public void Init(int id)
{
this.viewModel = new ResultViewModel(id);
this.DataContext = this.viewModel;
}
}
View-model:
public class ResultViewModel
{
private Model model;
public ResultViewMo... | {
"domain": "codereview.stackexchange",
"id": 21805,
"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#, wpf, mvvm",
"url": null
} |
homework-and-exercises, newtonian-mechanics, probability, integration, dirac-delta-distributions
You are basically computing what fraction of the time you spend at a particular point in phase space.
However what you have is a probability density. So $P(z,p)$ is something you multiply by a volume in phase space to get ... | {
"domain": "physics.stackexchange",
"id": 24203,
"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, newtonian-mechanics, probability, integration, dirac-delta... |
python
def main():
while True:
basedir = input("Please enter a folder to search: ")
if not os.path.exists(basedir):
print("This path does not exist.")
continue
else:
find_size = pyip.inputInt(prompt="Enter the size in bytes of the folders and files to fil... | {
"domain": "codereview.stackexchange",
"id": 43936,
"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
} |
ros, planning-environment
Title: Undocumented planning_environment parameters
The PR2's environment server launch file sets some parameters that are undocumented in the planning_environment package wiki page, in particular:
object_padd
pointcloud_padd
joint_state_cache_allowed_difference
Of these, the first two app... | {
"domain": "robotics.stackexchange",
"id": 5797,
"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, planning-environment",
"url": null
} |
# Project Euler Problems 5-6
## Problem 5¶
2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder.
What is the smallest positive number that is evenly divisible by all of the numbers from 1 to 20?
This is an interesting problem!
First thing's first, we can establi... | {
"domain": "messymind.net",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9873750510899383,
"lm_q1q2_score": 0.8184735023893851,
"lm_q2_score": 0.8289388125473628,
"openwebmath_perplexity": 1624.3937637247698,
"openwebmath_score": 0.6706660985946655,
"tags":... |
general-relativity, modified-gravity
In physics a theory is just a mathematical model i.e. something that will take data from experiments as input and compute predictions of future experiments as output. Physicists can come up with any mathematical model they want, and over the years there have been some really crazy ... | {
"domain": "physics.stackexchange",
"id": 43710,
"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, modified-gravity",
"url": null
} |
formal-languages, automata, finite-automata, discrete-mathematics, nondeterminism
Formulation as boolean satisfiability problem
The informal description above leads directly to an encoding as a boolean satisfiability problem. There is a set of variables that describes the transitions in the NFA, and a set of variable... | {
"domain": "cs.stackexchange",
"id": 1588,
"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, automata, finite-automata, discrete-mathematics, nondeterminism",
"u... |
python, python-3.x, sql, mysql, playing-cards
def bet(money):
clear_console()
print(f"Money: ${money}")
print("How much money do you want to bet?")
while True:
money_bet = int(input('> '))
if money_bet <= money and not money_bet <= 0:
money -= money_bet
return mo... | {
"domain": "codereview.stackexchange",
"id": 33989,
"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, sql, mysql, playing-cards",
"url": null
} |
semiconductor-physics, electronics, electrical-engineering
Title: Semiconductors ->Transistors npn and pnp I have had a tough time with semiconductors, I cannot understand the working of a transistor in saturation, as a switch, and also the cases as to when which part is forward biased, I also tried google but found o... | {
"domain": "physics.stackexchange",
"id": 38370,
"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": "semiconductor-physics, electronics, electrical-engineering",
"url": null
} |
cm3. In geometry, a pentagonal pyramid is a pyramid with a pentagonal base upon which are erected five triangular faces that meet at a point (the vertex). of prism & pyramid Compare volume Make square pyramid and square prism (w rectangles for sides) Fill the pyramid with styrofoam packing peanuts. For this pyramid the... | {
"domain": "mulinodiro.it",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9912886176011569,
"lm_q1q2_score": 0.8172797168492899,
"lm_q2_score": 0.8244619199068831,
"openwebmath_perplexity": 718.2802207678949,
"openwebmath_score": 0.6700800657272339,
"tags": ... |
python, python-3.x, fibonacci-sequence
Title: Sequence generation problem - Fibonacci Below is the representation and user interface fib_sequence for generating a Fibonacci sequence:
empty_rlist = None
#Representation - start
#Constructor
def rlist(first, rest):
return (first, rest)
#Selector
def first(s):
re... | {
"domain": "codereview.stackexchange",
"id": 12901,
"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, fibonacci-sequence",
"url": null
} |
slam, navigation, slam-gmapping, gmapping
Title: Timestamp gmapping
Hi, I tried to run gmapping on a robot and I have trouble with the synchronization of LaserScan messages and tf messages. I get this kind of warning:
[ WARN] [1343039900.709215634]: Failed to compute odom pose, skipping scan (Lookup would require ext... | {
"domain": "robotics.stackexchange",
"id": 10309,
"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": "slam, navigation, slam-gmapping, gmapping",
"url": null
} |
javascript, jquery
/* start now */
launchBreakpoint(currentBreakpoint);
/* start after reszie */
$(window).resize(function(){
clearTimeout(timer);
timer = setTimeout( function(){
// below is run every 1/4 of a second!
var newBreakpoint = getBreakpoint();
$.map( typeASli... | {
"domain": "codereview.stackexchange",
"id": 6683,
"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",
"url": null
} |
Using the inverse function: regular intervals of d
This is also easy, although it is a bit slow.
tab = Table[{d, xfnD[d]}, {d, 0, maxd, 1/10}]; // timing
(* 0.710307 *)
xTest = Interpolation[tab, InterpolationOrder -> 1];
maxrelerr[xTest]
(* {2.41031*10^-6, {x -> 1.04883}} *)
Interestingly the first method see... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9559813526452771,
"lm_q1q2_score": 0.8144509956090796,
"lm_q2_score": 0.8519528057272544,
"openwebmath_perplexity": 2278.5978839585237,
"openwebmath_score": 0.4268655478954315,
"ta... |
quantum-mechanics
$$ \rho_{2,{\rm top}}=\frac 1 2[|\rightarrow\rangle\langle\rightarrow|] $$
$$ \rho_{2,{\rm bot}}=\frac 1 2[|\leftarrow\rangle\langle\leftarrow|] $$
where:
$$ |\rightarrow\rangle=\frac 1{\sqrt 2}\left(\begin{array}{cc}1\\1\end{array}\right)$$
$$ |\leftarrow\rangle=\frac 1{\sqrt 2}\left(\begin{array}{c... | {
"domain": "physics.stackexchange",
"id": 80358,
"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",
"url": null
} |
general-relativity, tensor-calculus, continuum-mechanics
And at this point we have a well-defined set of partial differential equations in a number of unknown fields, for which we can set up well-defined initial- & boundary-value problems to be solved analytically or numerically. (An expanded but analogous framework a... | {
"domain": "physics.stackexchange",
"id": 34259,
"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, tensor-calculus, continuum-mechanics",
"url": null
} |
sides of equal length. Q2. Isosceles Right Triangle has one of the angles exactly 90 degrees and two sides which is equal to each other. Correct Answer: D. Step 1: An isosceles right triangle has two sides equal and measure of one of its angles is 90°. The isosceles right triangle has a right angle and two acute angles... | {
"domain": "chtijbug.org",
"id": null,
"lm_label": "1. Yes\n2. Yes",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9732407214714478,
"lm_q1q2_score": 0.8023999263490365,
"lm_q2_score": 0.824461932846258,
"openwebmath_perplexity": 461.7355810725568,
"openwebmath_score": 0.6874305009841919,
"tags": nu... |
java, performance, game, homework, processing
Title: My spaceship is slow to explode after being hit by the asteroid I am making a game for my computer science class. My professor's requirements are:
Write a Processing program that draws a triangle in the middle of the window.
Rotate the triangle when the left and ri... | {
"domain": "codereview.stackexchange",
"id": 18848,
"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, performance, game, homework, processing",
"url": null
} |
For a bounded subset of a metric space the diameter is two times the radius!
Let $S\subset X$ be bounded. The definitions are:
$\mathrm{diameter}(S):=\sup\{d(x,y)\,|\,x,y\in S\}$
$\mathrm{radius}(S):=\inf\{r>0\,|\,\exists x\in X:\,S\subset B(x,r)\}$
where $B(x,r)$ denotes the open ball of radius $r$ around $x$.
-
... | {
"domain": "mathoverflow.net",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9532750427013548,
"lm_q1q2_score": 0.8265235558618426,
"lm_q2_score": 0.8670357649558006,
"openwebmath_perplexity": 347.372224911955,
"openwebmath_score": 0.8915233016014099,
"tags"... |
complexity-theory, quantum-fourier-transform
Title: Why is the application of a Quantum Fourier Transform constant time? I am just curious (complexity theory wise) why the unitary matrix for the QFT (Quantum Fourier Transform) is constant time. From what I know, there is no general way to represent it as a sequence of... | {
"domain": "quantumcomputing.stackexchange",
"id": 4610,
"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": "complexity-theory, quantum-fourier-transform",
"url": null
} |
machine-learning, linear-regression
On the basis of this assumption, it can answer an additional question: "how confident it is that the slope is not zero?". The first method cannot answer this question.
For example, suppose the estimated slope is $2.1$ for both methods, we still cannot tell whether this slope is sig... | {
"domain": "datascience.stackexchange",
"id": 12054,
"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, linear-regression",
"url": null
} |
ros-groovy, hokuyo
Title: Hokuyo_node with groovy
Hello,
I am trying to use an Hokuyo laser with groovy.
I followed the tutorial http://www.ros.org/wiki/hokuyo_node/Tutorial/UsingTheHokuyoNode but I have a problem when I want to see the laser scan in Rviz.
The config file /hokuyo_test.vcg was created for fuerte and i... | {
"domain": "robotics.stackexchange",
"id": 12990,
"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-groovy, hokuyo",
"url": null
} |
programming-languages
Title: Is Programming/Coding necessary to pursue a masters degree in robotics? I am soon going to finish my undergrad in mechatronics engineering and wish to take up robotics for my masters. But I absolutely dislike any form of coding/programming. I am however,interested in the mathematics and ph... | {
"domain": "robotics.stackexchange",
"id": 1711,
"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": "programming-languages",
"url": null
} |
inorganic-chemistry, solubility, precipitation, salt
The concentrations of silver and chloride ions are $\pu{0.025 mol L-1}$ and $\pu{0.02 mol L-1}$, respectively. Dropping the unit $\pu{mol L-1}$ and multiplying the values gives a product larger than the solubility product, so the solution is supersaturated and silve... | {
"domain": "chemistry.stackexchange",
"id": 16836,
"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": "inorganic-chemistry, solubility, precipitation, salt",
"url": null
} |
field-theory, quantum-chromodynamics, scattering-cross-section, hadron-dynamics
$$\eta(t)=-\frac{1+\xi e^{-i\pi\alpha(t)}}{\sin\big [\pi\alpha (t)\big ]}$$
$\alpha^{\pm}_{i}(t)$ is called Regge trajectory and, as far as we
know, can be (very well) approximated by a straight line (Chew-Frautschi
plots). $\alpha ^{... | {
"domain": "physics.stackexchange",
"id": 52386,
"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": "field-theory, quantum-chromodynamics, scattering-cross-section, hadron-dynamics",
... |
# Find the limit $L=\lim_{n\to \infty} \sqrt{\frac{1}{2}+\sqrt[3]{\frac{1}{3}+\cdots+\sqrt[n]{\frac{1}{n}}}}$
Find the limit following:
$$L=\lim_{ _{\Large {n\to \infty}}}\:\sqrt{\frac{1}{2}+\sqrt[\Large 3]{\frac{1}{3}+\cdots+\sqrt[\Large n]{\frac{1}{n}}}}$$
P.S
I tried to find the value of $\:L$, but I found mysel... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9799765569561562,
"lm_q1q2_score": 0.8582507222906963,
"lm_q2_score": 0.8757869932689565,
"openwebmath_perplexity": 425.9537510141508,
"openwebmath_score": 0.9270058870315552,
"tag... |
harmonic-oscillator, differential-equations
Title: Amplitude of Oscillation Without Solving Differential Equation I am currently working on problem in my own research. There seems to be a weak analogy between my problem and motion on a spring. Therefore, I am exploring this question in regards to a mass oscillating on... | {
"domain": "physics.stackexchange",
"id": 48922,
"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": "harmonic-oscillator, differential-equations",
"url": null
} |
7. Re: Which is the correct solution? (Integral Calc)
Why not try to manipulate the two expressions and see if you get the same thing?
8. Re: Which is the correct solution? (Integral Calc)
Originally Posted by Prove It
Why not try to manipulate the two expressions and see if you get the same thing?
Halls you said th... | {
"domain": "mathhelpforum.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9674102542943773,
"lm_q1q2_score": 0.8316475222710998,
"lm_q2_score": 0.8596637451167995,
"openwebmath_perplexity": 556.9505669715442,
"openwebmath_score": 0.907077968120575,
"tags... |
36&14,9,9,9,9,10\\ 37&16,9,9,9,9,10\\ 38&16,9,9,9,9,12\\ 39&16,9,9,11,9,12\\ 40&16,9,9,11,11,12\\ 41&16,9,11,11,11,12\\ 42&16,11,11,11,11,12\\ 43&18,11,11,11,11,12\\ 44&18,11,11,11,11,14\\ 45&18,11,11,13,11,14\\ 46&18,11,11,13,13,14\\ 47&18,11,13,13,13,14\\ 48&18,13,13,13,13,14\\ 49&18,13,13,13,13,16\\ 50&18,13,13,15,1... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9843363485313248,
"lm_q1q2_score": 0.8202716974398752,
"lm_q2_score": 0.8333246035907933,
"openwebmath_perplexity": 1230.0420260421427,
"openwebmath_score": 0.7285186648368835,
"ta... |
continuous-signals, linear-systems, periodic, complex, system-identification
Most probably, it might simply be a typo in the question of the exam, which was supposed to be $$x(t) = 7e^{j(5t + \pi/2)} + 10e^{j(7t + \pi/5)}$$ | {
"domain": "dsp.stackexchange",
"id": 11676,
"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": "continuous-signals, linear-systems, periodic, complex, system-identification",
"url"... |
c++, c, functional-programming, bitwise, arduino
Title: Interlock of some equipments in electrical power system using simple Arduino Uno code I'm trying to implement some logic functions essential to control a small power system consisting of 2 Transformers labeled T1 and T2, 2 Generators (G1 and G2) and a bus tie (BT... | {
"domain": "codereview.stackexchange",
"id": 36794,
"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, functional-programming, bitwise, arduino",
"url": null
} |
evolution
An Immune Basis for Malaria Protection by the Sickle Cell Trait
Sickle Cell Anaemia and Malaria
If you look further, you will find a number of different examples, where evolution is present after humans went through a genetic bottleneck (meaning the number of humans was drastically reduced). | {
"domain": "biology.stackexchange",
"id": 2603,
"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": "evolution",
"url": null
} |
ros, master, multiple-machines
Pis is set to 172.17.1.0
Is that a typo? Should it read .10?
Comment by wicked88 on 2017-03-04:
Yep, it is .10 sorry
Comment by gvdhoorn on 2017-03-12:
@wicked88: the postimg link doesn't work. Could I also ask you to attach images to your question directly? I've given you enough karma ... | {
"domain": "robotics.stackexchange",
"id": 27192,
"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, master, multiple-machines",
"url": null
} |
$\dfrac{1}{\overline{z_n}} = \dfrac{n+i}{2n+1} = \dfrac{n}{2n+1}+\dfrac{i}{2n+1}$
Evidently $\dfrac{1}{\overline{z_n}}$ lies on the line $L: 2x+y=1$
$z_n$ hence lies on the curve obtained by inverting $L$ in the circle $|z|=1$. The result is a circle passing through origin $O$. The radius and centre of this circle ar... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9759464520028357,
"lm_q1q2_score": 0.8111511127461268,
"lm_q2_score": 0.8311430520409023,
"openwebmath_perplexity": 249.14602831782202,
"openwebmath_score": 0.8244228959083557,
"ta... |
(-2x^3 + 17x^2 – 30x) > 0
This is how I understand it,
$$x(-2x^2 + 17x - 30) > 0$$ (just took out x common) ok
x(2x – 5)(6 – x) > 0(factoring the quadratic) ok
2x(x – 5/2)(-1)(x – 6) > 0 (take 2 common) ---------> I think in this you took out -1 common to make the second bracket = (x-k) format?
First of all, if you ... | {
"domain": "gmatclub.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9683812327313546,
"lm_q1q2_score": 0.8360922418081329,
"lm_q2_score": 0.8633916205190225,
"openwebmath_perplexity": 1389.9678374776618,
"openwebmath_score": 0.699351966381073,
"tags": n... |
electromagnetism, electrostatics, electric-fields
Title: Infinite plate of charge - questions about previous asked question I asked the question previously here - Link. Look for the accepted answer.
I have 2 questions and since they both relate to the answer for my previous question, I will include both here. Note tha... | {
"domain": "physics.stackexchange",
"id": 95550,
"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, electrostatics, electric-fields",
"url": null
} |
ros-kinetic
Title: how do you assign cell voltage to BatteryState
I'm trying to send cell voltage information using ROS on an arduino, but I get an empty array as output. Do I need to set the size of the array somehow?
edited added voltage length and pointer to array of cell voltages, now the example works as expecte... | {
"domain": "robotics.stackexchange",
"id": 29897,
"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-kinetic",
"url": null
} |
python, pyqt
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
application = SPPWindow()
application.show()
sys.exit(app.exec_())
ui.py
# -*- coding: utf-8 -*-
from PyQt5 import QtCore, QtGui, QtWidgets
import numpy as np
from plotwidget import PlotWidget | {
"domain": "codereview.stackexchange",
"id": 36848,
"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, pyqt",
"url": null
} |
pcl, cmake
Originally posted by ahendrix with karma: 47576 on 2014-03-30
This answer was ACCEPTED on the original site
Post score: 1
Original comments
Comment by Maya on 2014-03-30:
That worked. But why was CMake able to find it if I put the function in the project file ? I just can't understand why...
Comment by ahe... | {
"domain": "robotics.stackexchange",
"id": 17467,
"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": "pcl, cmake",
"url": null
} |
neural-networks, image-recognition
, or would it simply learn to recognize cropped image pairs similar to those in the training data?
*opinion: I can't image such a model would generalize very well on new data.
For example, consider a picture of half a tree. With enough training data, the model could potentially reco... | {
"domain": "ai.stackexchange",
"id": 3863,
"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, image-recognition",
"url": null
} |
unit-testing, vba, logging
End Sub
Public Sub TestLogManagerPassesSpecifiedMessage()
expectedLogger = "TestLogger"
expectedLevel = TraceLevel
expectedMessage = "test message"
Set mock = MockLogger.Create(expectedLogger, TraceLevel)
LogManager.Register mock
LogManager.Log expectedLevel, expe... | {
"domain": "codereview.stackexchange",
"id": 9929,
"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": "unit-testing, vba, logging",
"url": null
} |
fluid-dynamics, pressure, vacuum
Title: Pressure - How much fluid can void support? Please refer to the attached drawing!
After watching some videos about the U-tube effect in drilling, a question came to me.
Imagine one fluid of heavy density being pushed down the drilling pipe by another lighter fluid, with the hel... | {
"domain": "physics.stackexchange",
"id": 24800,
"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": "fluid-dynamics, pressure, vacuum",
"url": null
} |
newtonian-mechanics, forces, newtonian-gravity, spring
To be sure there are such cases, take an extreme case where the mass of the hanging weight is negligible compared to the spring’s mass and the spring constant is high. The spring will begin to fall under its own weight while contracting rapidly about its center an... | {
"domain": "physics.stackexchange",
"id": 81130,
"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, forces, newtonian-gravity, spring",
"url": null
} |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.