text stringlengths 1 1.11k | source dict |
|---|---|
java, serialization
for (E element : collection) {
String line = serializer.serialize(element);
if (line.contains(ENDL)) {
throw new IllegalArgumentException(
"The line serializer may not return the new line " +
"character in its ... | {
"domain": "codereview.stackexchange",
"id": 17252,
"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, serialization",
"url": null
} |
reaction-mechanism, amines
Reductive amination can be achieved following either a one-step or a two-step procedure. In both procedures, an amine and a carbonyl compound condense to form an imine (with primary amine) or iminium ion (with secondary amine). This imine or iminium ion is then reduced in situ (one-step reac... | {
"domain": "chemistry.stackexchange",
"id": 12334,
"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": "reaction-mechanism, amines",
"url": null
} |
c, parsing, functional-programming
object
assoc( object key, list b ){
if( !valid( b ) ) return NIL_;
object pair = first( b );
if( valid( eq( key, first( pair ) ) ) )
return rest( pair );
else
return assoc( key, rest( b ) );
}
object
assoc_symbol( int code, list b ){
return assoc( (union ob... | {
"domain": "codereview.stackexchange",
"id": 43487,
"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, parsing, functional-programming",
"url": null
} |
lo.logic, type-theory, lambda-calculus
$$
\frac{\Gamma, x:1 \to \tau \vdash e : 1 \to \tau}
{\Gamma \vdash \mu x:1 \to \tau. e : 1 \to \tau}
$$
Once you've fixed this, you still can't define a factorial.
The plain $\kappa$-calculus does not have sums or natural numbers as a base type. As a result, you can't write... | {
"domain": "cstheory.stackexchange",
"id": 5095,
"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": "lo.logic, type-theory, lambda-calculus",
"url": null
} |
general-relativity, metric-tensor, potential-energy, geodesics
\begin{align}
L = \frac{m}{2} \, g_{\mu \nu} \, \frac{d x^{\mu}}{d \tau} \, \frac{d x^{\nu}}{d \tau} &\approx \frac{m}{2} \, g_{00} \, c^2 + \frac{m}{2} \, g_{ij} \, \frac{d x^i}{d \tau} \, \frac{d x^j}{d \tau}, \\[12pt]
&\approx \frac{1}{2} \, m \, c^2 + ... | {
"domain": "physics.stackexchange",
"id": 42482,
"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, metric-tensor, potential-energy, geodesics",
"url": null
} |
python, pandas, data-analysis
Title: How do I not display rows that have an empty value when trying to output a dataframe with pandas I have this table where there are missing values under the value2 column.
Value1
Value2
1000
1000
1000
500
1000
560
1000
560
What I would like to do is to display the above table... | {
"domain": "datascience.stackexchange",
"id": 10904,
"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, pandas, data-analysis",
"url": null
} |
general-relativity, differential-geometry
Title: Does trace of Ricci squared test for Ricci-flattness? Assume a Euclidean space with signature $(+,+,+,+...)$
If we know $R_{ab}R^{ab} = 0 $ does this imply $R_{ab}=0$ ?
And if so, will this test fail in Minkowski space with mixed signature?
We know $\sum_{ab} R_{ab}R_{a... | {
"domain": "physics.stackexchange",
"id": 89881,
"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, differential-geometry",
"url": null
} |
statistical-mechanics, electromagnetic-radiation, photons, partition-function
For a separable system, the energy of a $N$-degrees of freedom state (independently whether they represent quasi-particles or else) can be written as
$$
E(\{n_i\},N)= \sum_i n_i \varepsilon_i,
$$
where $\varepsilon_i$ is the eigenvalue of... | {
"domain": "physics.stackexchange",
"id": 87548,
"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": "statistical-mechanics, electromagnetic-radiation, photons, partition-function",
... |
lagrangian-formalism, field-theory, hamiltonian-formalism, constrained-dynamics, majorana-fermions
$${\cal H}=\Pi\dot\Psi-{\cal L}$$
Conjugate field $\Pi$ is
$$\Pi=\frac{\partial\cal L}{\partial\dot\Psi}=\frac{\dot\iota}{2}\bar\Psi\Gamma^0$$
And the Hamiltonian is
$${\cal H}=\frac{\dot\iota}{2}\bar\Psi\Gamma^0\dot\Psi... | {
"domain": "physics.stackexchange",
"id": 65767,
"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": "lagrangian-formalism, field-theory, hamiltonian-formalism, constrained-dynamics, m... |
ros, roslauch
Title: How to remap in launch file[error]
Hi, I am running Ubuntu 14.04. I've successfully installed ROS Indigo. I have also set up the catkin workspace from ROS tutorials successfully. I have installed two packages from package 1 and whycon from https://github.com/lrse/whycon.git and https://github.com... | {
"domain": "robotics.stackexchange",
"id": 29342,
"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, roslauch",
"url": null
} |
c#, multithreading, socket, client
client.mreBeginConnect.SetIfNotNull();
}
}
}
Disconnect code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace AsyncClientServer
{
internal... | {
"domain": "codereview.stackexchange",
"id": 15128,
"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#, multithreading, socket, client",
"url": null
} |
ros2, c++
with
[
CallbackMessageT=geometry_msgs::msg::Twist,
AllocatorT=std::allocator<void>,
MessageT=geometry_msgs::msg::Twist,
_Ty=std::_Binder<std::_Unforced,void (__cdecl Hello::* )(geometry_msgs::msg::Twist) const,Hello *,const std::_Ph<1> &>,
... | {
"domain": "robotics.stackexchange",
"id": 35647,
"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, c++",
"url": null
} |
regular-languages, context-free, finite-automata, formal-grammars
A trivial example is that $\mathscr{A}^*$ is regular, and if $L$ is context-free but not regular then $L \cap \mathscr{A}^* = L$ is context-free but not regular. | {
"domain": "cs.stackexchange",
"id": 2081,
"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, context-free, finite-automata, formal-grammars",
"url": null
} |
javascript, shuffle
Furthermore, your .reduce accumulator object introduces potential constant-time memory overhead that wasn't in the original for loop algorithm. Caching .length but also allocating objects and making extra function calls inside a loop is penny wise and pound foolish.
Anyway, after all the pains take... | {
"domain": "codereview.stackexchange",
"id": 41941,
"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, shuffle",
"url": null
} |
where $t_n$ denotes the $n$-th digit (either $0$ or $1$) in the infinite Thue-Morse sequence. $t$ starts as follows (first $32$ digits): $$01101001100101101001011001101001\dots$$
With the expression $\displaystyle\frac{2n + 1}{2n + 2}$ we are able to scan all natural numbers in pairs and when $t_n$ is $1$, we swap. Ex... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9706877675527114,
"lm_q1q2_score": 0.8171498562732341,
"lm_q2_score": 0.8418256452674009,
"openwebmath_perplexity": 472.86482224279206,
"openwebmath_score": 0.8669694662094116,
"ta... |
neural-network, convolutional-neural-network, convolution
As for example, for the o(0,0,0)=5 and for o(0,1,0)=7 both we used the w0[0],w01,w2 weights,
and it fits the picture above.
Now there is this picture:
And I'm not fully understand the 3 estimation. It says that the same color means the same weight,
but as I ca... | {
"domain": "datascience.stackexchange",
"id": 8140,
"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-network, convolutional-neural-network, convolution",
"url": null
} |
Calculation of Circle segment area(Portion or part of circle) , arc length(curved length), chord length, circle vector angle,with online calculation. In geometry, a circular segment (symbol: ) is a region of a circle which is "cut off" from the rest of the circle by a secant or a chord. The segment is always the smalle... | {
"domain": "soringlobal.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9843363480718236,
"lm_q1q2_score": 0.8047682741731853,
"lm_q2_score": 0.8175744761936437,
"openwebmath_perplexity": 247.53223545297217,
"openwebmath_score": 0.7293519377708435,
"... |
kurt-3) or the outright kurtosis? Note: Some formulas (Fisher’s definition) subtract 3 from the kurtosis to make it easier to compare with the normal distribution. sktest— Skewness and kurtosis test for normality 3 Methods and formulas sktest implements the test described byD’Agostino, Belanger, and D’Agostino(1990) wi... | {
"domain": "prycewarner.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9539660923657094,
"lm_q1q2_score": 0.8010777260277576,
"lm_q2_score": 0.8397339616560072,
"openwebmath_perplexity": 990.8219903759046,
"openwebmath_score": 0.7219990491867065,
"tags"... |
increase i. Here, we are not given that e needs to be kept constant. So we will not use the joint variation approach. Hi Karishma, Thanks for your reply. How will I know whether the question asks that a certain variable needs to be kept constant? The question above, "In a certain business, production index p is directl... | {
"domain": "gmatclub.com",
"id": null,
"lm_label": "1. Yes\n2. Yes\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 1,
"lm_q1q2_score": 0.8244619350028204,
"lm_q2_score": 0.8244619350028204,
"openwebmath_perplexity": 1564.8456925625587,
"openwebmath_score": 0.834241509437561,
"tags": null,
"url":... |
It is not difficult to see that this condition is also sufficient. Now, using this we have the following application:
Consequence. If ${r}$ is an algebraic number whose minimal polynomial has a leading coefficient which is not a power of ${2}$, then
$\displaystyle \arccos(r) \notin \pi \Bbb{Q}.$
Since the minimal po... | {
"domain": "wordpress.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9921841100551559,
"lm_q1q2_score": 0.806514029594715,
"lm_q2_score": 0.8128673110375457,
"openwebmath_perplexity": 814.9972035398341,
"openwebmath_score": 0.9984534382820129,
"tags": n... |
python, algorithm, pygame
Branch and bound Algorithm for Travelling Salesman Problem
based on
http://www.cs.sunysb.edu/~algorith/implement/syslo/distrib/processed/babtsp.p
'''
import time
INF = 100000000
best_cost = 0
def reduce(size, w, row, col, rowred, colred):
rvalue = 0
for i in xrange(size):
... | {
"domain": "codereview.stackexchange",
"id": 2006,
"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, algorithm, pygame",
"url": null
} |
terminology, vectors, relativity, vector-fields
Are four vectors always called vectors also when the components depend on position (like for example the position 4-vector) or are the components except for the position vector not a function of $x$? And are there examples of four-vectors (except position) where the comp... | {
"domain": "physics.stackexchange",
"id": 50921,
"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": "terminology, vectors, relativity, vector-fields",
"url": null
} |
sampling, downsampling
Title: up sample and down sample Let's say that I have a sampled signal x[n], it is being, in this exact order, up sampled by 2, down sampled by4, up sampled by 4 and down sampled by 2 to produce y[n].
It seems to me that it should be pretty self evident that since we up sampled the signal by 2 ... | {
"domain": "dsp.stackexchange",
"id": 2180,
"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": "sampling, downsampling",
"url": null
} |
matrix, matrix-factorisation, notation
Multiplication in Neural Networks
Let's look at a simple neural network with 3 input features $[x_1, x_2, x_3]$ and 2 possible output classes $[y_1, y_2]$. | {
"domain": "datascience.stackexchange",
"id": 7671,
"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": "matrix, matrix-factorisation, notation",
"url": null
} |
fft, fourier-transform, frequency, complex
I have never had big brain when it comes to signal processing so I would like to learn what is going on here and how these three plots per frequency relate.
Frequency of 0 Hz:
Frequency of 1 Hz:
Frequency of 7 Hz: | {
"domain": "dsp.stackexchange",
"id": 12466,
"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": "fft, fourier-transform, frequency, complex",
"url": null
} |
electricity, solid-state-physics, physical-chemistry, nanoscience, graphene
The units of sheet resistance are ohms, and sheet conductance is siemens. (Sometimes the unit of sheet resistance is written $\Omega/\Box$, "ohms per square", so that you don't mistakenly think it's an ordinary resistance.)
For most purposes t... | {
"domain": "physics.stackexchange",
"id": 8200,
"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": "electricity, solid-state-physics, physical-chemistry, nanoscience, graphene",
"ur... |
c++, object-oriented, c++14, networking, wrapper
// socket related configuarations
configureReadWriteFd();
configureTimeout(timeOut);
// telnet options
const telnet_telopt_t telnetOpts[] = {
{ TELNET_TELOPT_ECHO, TELNET_WONT, TELNET_DO},
{ TELNET_TELOPT_TTYPE, TELNET_WILL, TELNET_DONT},
... | {
"domain": "codereview.stackexchange",
"id": 43637,
"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++, object-oriented, c++14, networking, wrapper",
"url": null
} |
kinect, openni
but the red laser never turns on (although the green LED continues to blink when it is plugged into one of my USB 2.0 ports).
Any ideas on what could be the problem? The strange thing is, I've viewed point clouds through rviz recently so I've had it working. I didn't think I've done anything to break i... | {
"domain": "robotics.stackexchange",
"id": 6948,
"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": "kinect, openni",
"url": null
} |
-
Regarding your EDIT: Your construction is not order-isomorphic to the reals because $\{(p-1/x,p+1/x):p\in\Bbb R\}$ is an uncountable set of pairwise-disjoint nontrivial intervals, so as in Haskell Curry's answer you get an uncountable set of rational numbers in these sets. – Mario Carneiro Jul 9 '14 at 16:22 | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9854964173268184,
"lm_q1q2_score": 0.8125042725411928,
"lm_q2_score": 0.8244619242200082,
"openwebmath_perplexity": 189.29100340848777,
"openwebmath_score": 0.9235311150550842,
"ta... |
characteristic loads can be factored down for serviceability calculations. D2 is the deflection on the outboard end of the overhang. E=1x104 N/mm2. Computer Aided Deflection And Slope Yses Of Beams. Bending Analysis of Simply Supported and Clamped Circular plate - Free download as PDF File (. Use strain energy method. ... | {
"domain": "autismart.it",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9825575116884779,
"lm_q1q2_score": 0.8501324267518535,
"lm_q2_score": 0.8652240877899775,
"openwebmath_perplexity": 1316.018877203321,
"openwebmath_score": 0.556337833404541,
"tags"... |
java
textInput = textInput.replaceFirst(STARTING_COMMAS.pattern(), "");
textInput = textInput.replaceAll(TOO_MANY_COMMAS.pattern(), ",");
String[] scoresArray = textInput.split(",");
if (scoresArray.length != REQUIRED_SCORE_COUNT) {
throw new IllegalArgumentException("You have " + ... | {
"domain": "codereview.stackexchange",
"id": 10724,
"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",
"url": null
} |
c#, .net, networking, socket
private Socket _listener;
private readonly Policy _retryPolicy = Policy.Handle<Exception>()
.WaitAndRetryAsync(2, retryAttempt => TimeSpan.FromSeconds(1));
private bool IsInstantiated
{
get
{
lock (SyncRoot)
{
re... | {
"domain": "codereview.stackexchange",
"id": 25599,
"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, networking, socket",
"url": null
} |
java, tic-tac-toe
keep track of statistics
make it playable on the web
And here is the code (5 classes in total, as of now):
package game;
public enum Sign {
X, O;
}
package game;
public class Main {
public static void main(String[] args) {
// play Tic Tac Toe
Game game = new Game();
... | {
"domain": "codereview.stackexchange",
"id": 17879,
"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, tic-tac-toe",
"url": null
} |
c++, performance, algorithm
int main(int argc, char** argv) {
cin >> n >> q;
vector<node*> v (n); //vector holding all pointers to sets of nodes
for (int i = 0; i < n; i++) //make n sets of 1 element each
{
node* n = new node(i);
n->parent = n;
v[i] = n;
}
}
Would using ... | {
"domain": "codereview.stackexchange",
"id": 25573,
"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, algorithm",
"url": null
} |
c#, strings, array, image
Title: Ordering Gallery images by custom order I wrote some code a few weeks ago, to take a string similar to
seq[]=8&seq[]=7&seq[]=5&seq[]=1&seq[]=4&seq[]=3&seq[]=6&seq[]=0&seq[]=2
and put it into a gallery, to be ordered by jQuery UI's Sortable, which works all good, however, I'm concerne... | {
"domain": "codereview.stackexchange",
"id": 11497,
"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#, strings, array, image",
"url": null
} |
inorganic-chemistry, ph
The resulting $\mathrm{pH}=12.0$.
The salt $\ce{NaA}$ is dissociated to $\ce{Na+}$ and $\ce{A-}$. The latter than undergoes hydrolysis
$$\ce{A- + H2O <=> HA + OH-}$$
with
$$\log{\frac{[\ce{A-}]}{[\ce{HA}]}}= \mathrm{pH} - \mathrm{p}K_\mathrm{a}$$
$$\frac{[\ce{A-}]}{[\ce{HA}]}=10^{ \mathrm{pH} -... | {
"domain": "chemistry.stackexchange",
"id": 18003,
"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, ph",
"url": null
} |
objects whose surface area is composed of triangles and quadrilaterals, specifically focusing on pyramids. Lateral Surface Area Of a Square Pyramid Calculator. The rectangular pyramid is no more complicated than the square pyramid for an elementary student. Calculate lateral area and surface area of right prisms. The v... | {
"domain": "auralicht.de",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9825575193498701,
"lm_q1q2_score": 0.8166458533833736,
"lm_q2_score": 0.8311430499496096,
"openwebmath_perplexity": 333.35130182291016,
"openwebmath_score": 0.7742525935173035,
"tag... |
ros
Title: Any progress in Using ROS in C#?
Hi,
I have searched the community for some one who had successfully used Ros in C# but i didn't find anyone!
Actually I have to write an API for a commercial Robotic Arm in linux environment which is only have a C# SDK , so i am using monoDevelop for writing C# codes in lin... | {
"domain": "robotics.stackexchange",
"id": 9235,
"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
} |
newtonian-mechanics, forces, newtonian-gravity, determinism, chaos-theory
A slightly more complicated, but more realistic example is the double pendulum. No matter how well you try to reproduce the same initial conditions, you will not be able to predict basic aspects of its behaviour (e.g., the number of flips). None... | {
"domain": "physics.stackexchange",
"id": 35422,
"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, determinism, chaos-theory",
"url... |
homework-and-exercises, electromagnetism
Title: Electric dipole oscillation in a uniform electric field We have two charged balls of masses $m_1=m_2=15.0\,g$, and charges $+q_1=-q_2=0.800\,\mu C$, fixed to the ends of a very light rod of length $\ell$. The centre of the rod is mounted on a friction-free pivot, and the... | {
"domain": "physics.stackexchange",
"id": 70725,
"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, electromagnetism",
"url": null
} |
c#
DataReader
With the above helper method your main while loop can be simplified like this
SqlDataReader reader = sql.ExecuteReaderStoreProcedure("dbo.[Select_IPRange]", spParameters);
while (reader.Read())
{
if (canAccess = ProcessRecord((IDataRecord)reader, ipAddress))
break;
}
reader.Close();
return ca... | {
"domain": "codereview.stackexchange",
"id": 43132,
"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
} |
quantum-field-theory, particle-physics, standard-model, bosons, electroweak
Title: Where does the extra mass of a $W$ boson come from in particle decay? I’ve seen everywhere explaining that it can exist because of time/energy uncertainty. I get this. I understand that’s WHY it exists but I’ve still never gotten WHERE ... | {
"domain": "physics.stackexchange",
"id": 60040,
"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, particle-physics, standard-model, bosons, electroweak",
"u... |
noise, filtering, measurement
As can be seen, this is quite an unexpected result from seemingly such a stable (slowly moving) device. One would for example expect a more monotonic curve (though not necessarily a strictly monotonic curve but at least not so much oscillatory either...)
Looking in detail to the first 800... | {
"domain": "dsp.stackexchange",
"id": 5024,
"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": "noise, filtering, measurement",
"url": null
} |
autocorrelation using a correlogram A correlogram shows the correlation of a series of data with itself; it is also known as an autocorrelation plot and an ACF plot. in the link bellow i put the true test of ACP and PACF to identify ARMA and SARMA orders. The autcorrelation function is a basic operation for time series... | {
"domain": "stcc.org",
"id": null,
"lm_label": "1. Yes\n2. Yes\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9609517095103499,
"lm_q1q2_score": 0.834900574262525,
"lm_q2_score": 0.8688267745399465,
"openwebmath_perplexity": 1026.4608208040067,
"openwebmath_score": 0.7975536584854126,
"tags": n... |
python, python-3.x, game, wordle
Warning: be aware of unwanted side effects when multiplying lists.
Globals
The globals in line 27 (global board, colorList) impose an unnecessary dependency between your main code (outside of boardprint()) and the method. You can never use boardprint() for anything else than printing e... | {
"domain": "codereview.stackexchange",
"id": 43678,
"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, game, wordle",
"url": null
} |
states-of-matter, matter
Except not really: Under these conditions, the classical notions of states of matter break down entirely: Between these states of matter there are no interfaces, just a gradual, continuous transition.
In other words: The distinctive line to separate one state from another you are after doesn't... | {
"domain": "physics.stackexchange",
"id": 20472,
"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": "states-of-matter, matter",
"url": null
} |
optics, visible-light, reflection
Title: Why do roads appear wet on hot days? I do not understand Why do roads appear wet on hot days? I don't understand the bending of light rays in relation to the density fluctuations. How are they related? Why do we see mirror images of cars on road in hot days? It is on a small sc... | {
"domain": "physics.stackexchange",
"id": 16320,
"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, reflection",
"url": null
} |
newtonian-mechanics, waves, spring, string, dispersion
For large $\lambda$, the spring energy dominates the oscillation because the string is stretched in a rather smooth way, so less contribution from potential energy of the stretched string, and we have $\omega \sim \sqrt{\chi/\mu} \sim m$. In the case of high $k$, ... | {
"domain": "physics.stackexchange",
"id": 61664,
"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, waves, spring, string, dispersion",
"url": null
} |
php, pdo
//Error Handler
function errorhandler ($functionError) {
print_r ($functionError);
echo "Sorry we are experiencing issues we are aware of the problem";
}
//Update users function
function update($db, $fn, $ln, $email, $offers, $vlue, $response)
{
$stmt = $db->prepare("insert into kkt (fName_765, ... | {
"domain": "codereview.stackexchange",
"id": 3158,
"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, pdo",
"url": null
} |
machine-learning
Netflix up until very recently did all its recommendations using classical algorithms and setups, see paper on their architecture.
For this type of light recommendation problem I would recommend using something from PredictionIO. It is very versatile and can be used to classify using a variety of inp... | {
"domain": "datascience.stackexchange",
"id": 1630,
"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",
"url": null
} |
quantum-computing
The only way to make a reversible function out of a function that may not be reversible is to add "ancillary" or "garbage" qubits; this is how the Toffoli gate implements the non-reversible AND function. That's basically what the second qubit is doing here: without it, we can't even necessarily call ... | {
"domain": "cs.stackexchange",
"id": 13441,
"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-computing",
"url": null
} |
reinforcement-learning
So, it seems like the actor updated by reducing the mean of critic_with_actor_tf.
This raises the question, what does the TD Error shown in the diagram above represent and how is that related to updating the policy? The TD Error is used to directly update the critic and not the actor.
The actor ... | {
"domain": "datascience.stackexchange",
"id": 6499,
"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
} |
fusion, design
Title: Proof Human Designs for Fusion Could Work Are there convincing proofs on paper that fusion is possible the various ways humans are trying to design machines to do it or is the only way absolutely proven to work in theory also the only way actually working reactors (i.e. stars) work, that is, gett... | {
"domain": "physics.stackexchange",
"id": 2029,
"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": "fusion, design",
"url": null
} |
javascript, jquery
var time = new Date();
var delta = time - this.timestamp;
var percent = (delta / this.timeout * 100).toFixed(0);
// Also stay away from shorthand ifs, not a good style to go with.
if (percent > 100) {
percent = 100;
}
... | {
"domain": "codereview.stackexchange",
"id": 1277,
"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
} |
c#
Title: Dynamic, generic property "assignator" Point one, I know "Assignator" isn't a real word. I couldn't find a better fit so right now that word is added to my Visual Studio's dictionary!
As a part of my (future) MVVM framework, I needed a class to assign values to a property of an object. As it's a quite generi... | {
"domain": "codereview.stackexchange",
"id": 17290,
"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
} |
neural-networks, activation-functions, hyperparameter-optimization, hyper-parameters, network-design
Are these good ways of designing a neural network for this task? First of all, what you are trying to do can be achieved by simple logical programming. Secondly, you are making things overly complex.
$1$ node in a neur... | {
"domain": "ai.stackexchange",
"id": 425,
"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, activation-functions, hyperparameter-optimization, hyper-parameters, net... |
python, simulation, pygame, vectorization
def _handle_borders(self) -> None:
"""
PRIVATE METHOD
Check if positions are out of bounds and replace them.
Returns
-------
None
"""
# X-coordinate
self._positions_matrix[:, 0] = np.where(
... | {
"domain": "codereview.stackexchange",
"id": 45086,
"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, simulation, pygame, vectorization",
"url": null
} |
python, algorithm, python-2.x, graph
The name allVisited doesn't describe the variable very well: better would be something like visited_count.
The code in BFS uses the name persons for the nodes in the graph. But nothing in this code depends on the fact that the nodes represent persons. So it would be better to use a... | {
"domain": "codereview.stackexchange",
"id": 22241,
"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, algorithm, python-2.x, graph",
"url": null
} |
physiology, hematology
Near the physiological pH probably all of the charges on hemoglobins
come from their constituent amino acids. Neutral amino acids
contribute one terminal carboxyl and one terminal amino group to each
polypeptide chain which is not a ring. Additional positive charges are
contributed by the nitrog... | {
"domain": "biology.stackexchange",
"id": 11585,
"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": "physiology, hematology",
"url": null
} |
linear-programming, integer-programming, constraint-satisfaction
Title: "Greater than AND smaller than" condition in integer linear program with a binary variable I found this related question, but that's not quite it
Is it possible to model this with integer programming:
$$A = \begin{cases} 1 & \text{if } B \geq C \g... | {
"domain": "cs.stackexchange",
"id": 14480,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "linear-programming, integer-programming, constraint-satisfaction",
"url": null
} |
ruby, plugin, jekyll
Title: Jekyll plugin which bundles files into a zip archive I am not a Ruby developer but cold-reading existing Jekyll plugins I implemented one to bundle files in a zip archive and open sourced it on GitHub.
What do I need to fix to make it look more Ruby-native and/or Jekyll-native?
# Copyright ... | {
"domain": "codereview.stackexchange",
"id": 42188,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "ruby, plugin, jekyll",
"url": null
} |
computer-networks, communication-protocols
Title: What are the underlying mechanisms allowing us to unsend an email? I am currently studying Computer Networking, and I was reading about the different types of Application Layer Protocols. In the book I am reading (Computer Networking: A Top-down Approach) it is mention... | {
"domain": "cs.stackexchange",
"id": 15582,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "computer-networks, communication-protocols",
"url": null
} |
radiation, units, radioactivity, medical-physics
$$\frac{dN_0}{dt} = \frac{1}{0.2201}=4.54\,\mathrm{curies} = 1.68\times 10^{11}\,\mathrm{becquerels}$$
The mean-life of Mo-99 is
$$\tau = \ln{2}\times t_{1/2}=3.425\times10^5\,\mathrm{seconds}$$
Since a becquerel is one decay per second, the initial number of Mo-99 atom... | {
"domain": "physics.stackexchange",
"id": 94844,
"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": "radiation, units, radioactivity, medical-physics",
"url": null
} |
ros, ros-kinetic, freenect, freenect-launch
Title: Trouble to run kinect on freenect drivers - missing file warning
Hi,
I'm trying to run kinect on Ubutu 16.04 and ROS Kinetic, NUC platform.
Im new to kinect/ros/ubuntu. I tried on kinect 1414 and 1473 but the same problem.
I install drivers:
sudo apt-get install -y f... | {
"domain": "robotics.stackexchange",
"id": 27669,
"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, freenect, freenect-launch",
"url": null
} |
All the 3 equation represent the triangle and [x] and [y] is centroid (x1+x2+x3)/3 and (y1+y2+y3)/3
You can simulate x and y "randomly and uniformly " with the above condition to check for correctness
#### shikamaru
Can you explain why [x]=1 [y]=4/3?
Thank you very much
#### atq
I made a video on this problem a whi... | {
"domain": "quantnet.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.971129092218133,
"lm_q1q2_score": 0.8273561548386,
"lm_q2_score": 0.8519528057272544,
"openwebmath_perplexity": 1775.2038433931466,
"openwebmath_score": 0.7495577931404114,
"tags": null... |
javascript, html, event-handling, dom, to-do-list
Title: To Do List using basic JS I learned javascript from some tutorials and as per advice, I thought of creating some task by my self. I wrote the following code and as I expected I saw the answer. If someone can assist me with how to code better? (The below code wil... | {
"domain": "codereview.stackexchange",
"id": 31396,
"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, html, event-handling, dom, to-do-list",
"url": null
} |
watson, healthcare
How exactly such AI can help doctors to diagnose the diseases? Watson can make its diagnosis based on the patient's data and comparing it to the data from millions of other studies.
For example, having enough genetic data and the right algorithms, its AI computing capability demonstrated the huge po... | {
"domain": "ai.stackexchange",
"id": 45,
"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": "watson, healthcare",
"url": null
} |
# How can I indicate formally that an element is removed from a vector?
Consider $$\vec{x}\in\mathbb{R}^n$$ and $$\vec{y}\in\mathbb{R}^{n-1}$$, where $$\vec{y} = (x_1, \dots, x_{k-1}, x_{k+1}, \dots, x_n)^\intercal$$ $$\forall\;x_k\in\vec{x}$$.
How can I formally write that $$\vec{y}$$ is composed of all elements of ... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9693242009478239,
"lm_q1q2_score": 0.8119253075497138,
"lm_q2_score": 0.8376199694135332,
"openwebmath_perplexity": 215.73580725852656,
"openwebmath_score": 0.9648499488830566,
"ta... |
python, algorithm
Test code:
qm_algorithm("XYZ", [3, 4, 5, 7]) # YZ + XY'
qm_algorithm("XYZ", [1, 3, 5, 6, 7]) # XY + Z
qm_algorithm("ABCD", [0, 2, 4, 8, 10, 11, 15]) # ACD + B'D' + A'C'D'
qm_algorithm("WXYZ", [0, 1, 3, 5, 14, 15]) # W'X'Y' + W'Y'Z + W'X'Z + WXY Function signatures
This:
def combine(implicant_a, i... | {
"domain": "codereview.stackexchange",
"id": 37693,
"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, algorithm",
"url": null
} |
c#, beginner
{
var xDoc = XDocument.Load(pathToDocument);
xDoc.Descendants(descendant)
.Where(n => (string)n.Element(element) == elementValue)
.Remove();
xDoc.Save(newDocumentPath);
} The method has definitely too many arguments and the reason for that is because it does too much. When you look at ... | {
"domain": "codereview.stackexchange",
"id": 33526,
"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#, beginner",
"url": null
} |
Hint: For induction, you need to prove the base case: $\sqrt{a_1+a_2} \le \frac{a_1+a_2}{2}$. If you square both sides... Then you need to prove that if it works for $n$ numbers, it works for $n+1$, so put the averages for $a_1 \ldots a_n$ in for $a_1$.
-
An induction proof which I like, is to prove that
If $\displa... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.979976559295341,
"lm_q1q2_score": 0.8079533639939012,
"lm_q2_score": 0.8244619285331332,
"openwebmath_perplexity": 414.8896012355736,
"openwebmath_score": 0.8507589101791382,
"tags... |
I'm assuming (partly because he did create tables) that Euler would know the values of $$e$$ and $$\ln(2)$$ to at least 4 decimal places, and your "by hand" guy should also know those. Explicitly calculating $$e^{-1/e}$$, however, hast to be declared "too hard"; otherwise the problem becomes a triviality.
The followin... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9828232904845686,
"lm_q1q2_score": 0.8672706638823543,
"lm_q2_score": 0.8824278710924295,
"openwebmath_perplexity": 224.71133113835512,
"openwebmath_score": 0.8837817311286926,
"ta... |
computability, logic, halting-problem, incompleteness
A practical question about universal Turing machines is whether it is of any importance that the alphabet of a universal Turing machine be the same as that of the Turing machines that it simulates. I thought that would be necessary in order to concoct a proper diag... | {
"domain": "cs.stackexchange",
"id": 15712,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "computability, logic, halting-problem, incompleteness",
"url": null
} |
general-relativity, special-relativity
$$R = \frac{m_{sun}}{m_{ion}}\cdot \frac{a_0^2}{r^2_{sun}} = \frac{2\cdot 10^{30}\text{kg}}{50u}\left(\frac{5.3\cdot 10^{-11}}{7\cdot 10^8}\right)^2 = \frac{2\cdot 10^{30}\text{kg}}{ 50\cdot 1.66\cdot 10^{-27}\text{kg}}\cdot 0.57 \cdot 10^{-38} = 1.4\cdot 10^{17}$$
Therefore th... | {
"domain": "physics.stackexchange",
"id": 74077,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "general-relativity, special-relativity",
"url": null
} |
4
In contrast to common misunderstanding, aliasing does not affect the process of sampling, rather it affects the process of reconstruction. i.e., the samples themselves do not contain error, but their interpretation at the reconstruction (or anything related with it) will be in error. So, if you sample a sine wave $$... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9585377249197138,
"lm_q1q2_score": 0.827593426169699,
"lm_q2_score": 0.8633916064586998,
"openwebmath_perplexity": 861.5809644382988,
"openwebmath_score": 0.7452077269554138,
"tags... |
python, performance, python-2.x, web-scraping, beautifulsoup
yield city_orig_dest
input_data = datareader('data.csv')
def webscrapper(x):
""" This function scraped the required website and extracts the
quickest connection time within given time durations """
#Create a browser object
br = Browse... | {
"domain": "codereview.stackexchange",
"id": 24676,
"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, performance, python-2.x, web-scraping, beautifulsoup",
"url": null
} |
pressure, units
The mm of Hg was defined as the pressure generated by a column of mercury one millimeter high. Since the pressure of mercury depends on temperature and gravity, it is now redefined as
$$\mathrm{0.001\ mL \cdot 13595.1~mg \cdot 9.80665\ m/s^2 = 133.322387415 ~Pa}$$
This has caused a difference between ... | {
"domain": "chemistry.stackexchange",
"id": 3120,
"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, units",
"url": null
} |
evolution, human-evolution, species
Other definitions of species and taboo
Well, the issue is that there is no other commonly accepted definition of species. Typically, above I only considered outbreeding depression and I did not consider a potential pre-zygotic barrier that would result from geographic isolation or f... | {
"domain": "biology.stackexchange",
"id": 6815,
"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, human-evolution, species",
"url": null
} |
# Inverse Functions and $u$-Substitution
Back in my undergrad days I wrote a false proof of the following.
Problem. Prove that $\displaystyle\int_0^{2\pi}\frac{dx}{1+e^{\sin{x}}}=\pi$
Proof. Integrating by parts gives $$\int_0^{2\pi}\frac{dx}{1+e^{\sin{x}}} = \left.\frac{x}{1+e^{\sin{x}}}\right\vert_0^{2\pi}+\int_0^... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9763105307684549,
"lm_q1q2_score": 0.8278798541319181,
"lm_q2_score": 0.8479677602988602,
"openwebmath_perplexity": 314.2705388949192,
"openwebmath_score": 0.9518071413040161,
"tag... |
$$\int_a^{b}[f(x)]^{n} dx \leq \int_a^{b} M^{n}=M^{n} (b-a)$$ where $$M=\sup \{f(x): a \leq x \leq b\}$$. Hence $$(\int_a^{b}[f(x)]^{n} dx)^{1/n} \leq M (b-a)^{1/n}$$. Letting $$n \to \infty$$ we get LHS $$\leq$$ RHS.
Now there is a point $$x_0$$ such that $$f(x_0)=M$$. Suppose $$a < x_0 . Let $$\epsilon >0$$. By conti... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9688561685659695,
"lm_q1q2_score": 0.8094633786579798,
"lm_q2_score": 0.8354835371034368,
"openwebmath_perplexity": 179.89002442304465,
"openwebmath_score": 0.9733641147613525,
"ta... |
impulse-response, frequency-domain, causality
Title: Causality of an estimated filter Assume $\tilde{h}(f)$ is a filter estimated by an algorithm for (room) impulse response estimation working in the frequency domain.
Is there a way to assert if such filter is causal?
Specifically, without resolving it in the time dom... | {
"domain": "dsp.stackexchange",
"id": 11754,
"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": "impulse-response, frequency-domain, causality",
"url": null
} |
of Materials. Determine the distance 'd' between the sections such that the centroidal moment of inertia about the x- and y-axis are equal. If the mass of the wheel is 1. Section modulus helps in determining the strength of the section. Find the polar moment of inertia and the polar radius of gyration with respect to a... | {
"domain": "everwoodbiocostruzioni.it",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.985271388745168,
"lm_q1q2_score": 0.8432456481315765,
"lm_q2_score": 0.8558511469672594,
"openwebmath_perplexity": 466.01335969356194,
"openwebmath_score": 0.6785146594047546... |
ros-kinetic, ubuntu, ubuntu-xenial
I know there is a set of nodes for differential drive controller, but I haven't used it. I have looked at it though and it seems pretty confusing. Start there though and see how it goes.
Comment by Hemanth on 2019-03-15:
I have a node that you referred to as number 2 that takes in a ... | {
"domain": "robotics.stackexchange",
"id": 32644,
"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, ubuntu, ubuntu-xenial",
"url": null
} |
ros2
Originally posted by Karsten with karma: 643 on 2019-01-22
This answer was ACCEPTED on the original site
Post score: 6
Original comments
Comment by Gabbar on 2019-01-22:
Thanks !! I forgot to see little comment at the page.
One more question, when we play rosbag with melodic (ROS1). It requires roscore (central ... | {
"domain": "robotics.stackexchange",
"id": 32310,
"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
} |
ubuntu, rosjava, android
Am I missing a step somewhere or using the wrong URI?
Edit: I've seen posts about setting ROS_IP and I tried that too (set in .bashrc).
Edit: The problem was with VMWare Fusion. It was a networking setting. In VMWare, select the wrench icon for the VM, then choose "Network Adaptor" and then ... | {
"domain": "robotics.stackexchange",
"id": 8830,
"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": "ubuntu, rosjava, android",
"url": null
} |
The set whose size you need to find is $P_1\cup P_3\cup P_5\cup P_7\cup P_9$. Inclusion-exclusion is a general method for finding the size of a union of sets with overlaps. In brief, to get the correct count, you need to subtract from the sum above the sizes of all intersections $P_j\cap P_k$, then to add the sizes of ... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9780517424466176,
"lm_q1q2_score": 0.8171461372623698,
"lm_q2_score": 0.8354835452961425,
"openwebmath_perplexity": 106.11048891062624,
"openwebmath_score": 0.7927528619766235,
"ta... |
c++, algorithm, image, error-handling, c++20
template<arithmetic ElementT = double>
constexpr static auto difference(const Image<ElementT>& input1, const Image<ElementT>& input2)
{
return pixelwiseOperation([](auto&& element1, auto&& element2) { return std::abs(element1 - element2); }, input1, input2);... | {
"domain": "codereview.stackexchange",
"id": 42578,
"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, image, error-handling, c++20",
"url": null
} |
python, performance, python-2.x, iterator, iteration
for section in ClassDic[classType]:
notIn = True
for alreadyIn in ignore:
if ignore[alreadyIn] == ClassDic[classType][section]:
notIn = False
if notIn:
condenceSectionDic[str(Cla... | {
"domain": "codereview.stackexchange",
"id": 26995,
"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, performance, python-2.x, iterator, iteration",
"url": null
} |
Let $$GA=GB$$ We wish to show that $$A\subseteq B$$ and $$B\subseteq A$$.
Let $$p\in A$$. Then $$1/p\in GA$$. Then $$1/p\in GB$$. Now if $$p\not \in B$$ then there is no way that $$1/p$$ comes in $$GB$$, because any linear combination of $$1/p\alpha$$s where $$p\alpha$$ is different from $$p$$, will never give $$p$$ i... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.979667648438234,
"lm_q1q2_score": 0.8076986703020478,
"lm_q2_score": 0.8244619199068831,
"openwebmath_perplexity": 201.4536020939503,
"openwebmath_score": 0.8656799793243408,
"tags... |
homework-and-exercises, classical-mechanics, lagrangian-formalism, variational-calculus, classical-field-theory
$$
Setting this to zero we would find the equation of motion for a massless scalar field.
In case you're curious though, we can write out the generalization of the Euler-Lagrange equations by
$$
\frac{\delta... | {
"domain": "physics.stackexchange",
"id": 73326,
"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, classical-mechanics, lagrangian-formalism, variational-cal... |
optics, electromagnetic-radiation, double-slit-experiment, interference, diffraction
For each of the slit $S_1$ ans $S_2$, if the path difference from $S'$ differ by half wavelength compared to that of $S$ then the interference pattern produced by $S$ gets nullified by that produced by $S'$. This is since the maxima o... | {
"domain": "physics.stackexchange",
"id": 44784,
"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, electromagnetic-radiation, double-slit-experiment, interference, diffracti... |
Now, notice that by partitioning a rooted plane tree into its root and its collection of branches with a cyclic ordering on the branches, we have $R=X\cdot (C\odot T)$, as each of the branches can be thought of as a rooted tree along with a linear ordering the children of each node. An example with $1$ as the root, and... | {
"domain": "mathematicalgemstones.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9911526436103748,
"lm_q1q2_score": 0.8056755909791856,
"lm_q2_score": 0.8128673178375734,
"openwebmath_perplexity": 596.1898022448726,
"openwebmath_score": 0.7456079721450806... |
gazebo, xacro, sdformat, sdf, ros-iron
Title: Inertia Element Conversion Issues in URDF to SDF in ROS2 Iron (Worked in Galactic) I am encountering an issue in ROS2 Iron that wasn't present in ROS2 Galactic, related to the conversion of a URDF file (generated from XACRO) to SDF, specifically regarding the inertia eleme... | {
"domain": "robotics.stackexchange",
"id": 38945,
"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, xacro, sdformat, sdf, ros-iron",
"url": null
} |
• The criterion of Sylvester is well-adapted to your case. – Giuseppe Negro May 24 '18 at 21:37
• @GiuseppeNegro Beat me to it. – KennyB May 24 '18 at 21:53
Yes. Your matrix can be written as $$(a+b)I + a ee^T$$ where $I$ is the identity matrix and $e$ is the vector of ones. This is a sum of a symmetric positive defin... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9859363737832231,
"lm_q1q2_score": 0.8747272887546196,
"lm_q2_score": 0.8872046026642944,
"openwebmath_perplexity": 158.49397296301,
"openwebmath_score": 0.8519240021705627,
"tags"... |
c++, c++17, variant-type
/** A variant (sum type) that can contain one of two different types at any one time**/
template<typename T1, typename T2>
class Either {
using Bigest = std::conditional_t<sizeof(T1) <= sizeof(T2), T1, T2>;
alignas(sizeof(Bigest)) std::byte storage[sizeof(Bigest)];
std::optional<s... | {
"domain": "codereview.stackexchange",
"id": 37623,
"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++17, variant-type",
"url": null
} |
java
I am not sure why my approach is wrong and approach 2 is right? Not having run it, Approach 1 looks like it would
just be the identity function, spitting out exactly what went in.
That is, there's no rounding.
An input like #ABCDEF should be rounded off to #BBDDFF.
A smaller value like #234567 would round in the
... | {
"domain": "codereview.stackexchange",
"id": 44890,
"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",
"url": null
} |
classical-mechanics, energy, kinematics, energy-conservation
in the second braking action from 25m/s to 0m/s, thus making the brakes consume a total of 12.5MJ in heat they need to dissipate.
That's obviously completely wrong, because where did the extra 12.5MJ go? I'm missing something blatantly obvious here that mak... | {
"domain": "physics.stackexchange",
"id": 22814,
"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, energy, kinematics, energy-conservation",
"url": null
} |
c++, algorithm, c++11
return ans;
}
std::tuple <int,int,double> max_crossing_subarray(std::vector<double> A, int low, int mid, int high){
double inf = std::numeric_limits<double>::infinity(); // is this wise?
double sum = 0;
int max_left = 0;
double left_sum = -inf;
for(int i=mid; i>=low; i--)... | {
"domain": "codereview.stackexchange",
"id": 24572,
"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, c++11",
"url": null
} |
seven years the... 'S Theorem on Local Extrema, ends with f′ ( c ) = f a... On the closed interval, and browse through concepts KEESLING in this post we a... Swipe through stories, and browse through concepts to show your set up in finding the Value s. Takeoff at 2:00 PM on a 2500 mile flight proving this very importan... | {
"domain": "baghdadbythebaysf.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9559813526452771,
"lm_q1q2_score": 0.8608896766501983,
"lm_q2_score": 0.9005297794439688,
"openwebmath_perplexity": 744.5859445952211,
"openwebmath_score": 0.8488137125968933... |
ros-melodic, rospy
Original comments
Comment by mkb_10062949 on 2020-04-29:
Okay got it, I modified the publisher rate and I see a significant improvement. Thank you so much!
Comment by mkb_10062949 on 2020-04-29:
Is there a way to parallelize the code using Multiprocessing module to bypass the GIL to use multi cores ... | {
"domain": "robotics.stackexchange",
"id": 34858,
"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-melodic, rospy",
"url": null
} |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.