text stringlengths 1 1.11k | source dict |
|---|---|
machine-learning, deep-learning, neural-network, activation-function
(As an aside, I see practically no research on the pros or cons of using different activation functions at different layers. I suspect this is also because of the hyperparameter combinatorial explosion, combined with the expectation of it not making ... | {
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "machine-learning, deep-learning, neural-network, activation-function",
"url"... |
galaxy, big-bang-theory, supermassive-black-hole, james-webb-space-telescope, metallicity
and Hawking radiation would tear the matter into pieces that are subatomic particles like protons and neutrons and expel it (causing loss of information. Refer to the Information paradox), but the main point is that the energy of... | {
"domain": "astronomy.stackexchange",
"id": 6941,
"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": "galaxy, big-bang-theory, supermassive-black-hole, james-webb-space-telescope, met... |
ros, moveit, ompl, source
from /home/ruinian/ws_moveit/src/moveit/moveit_planners/ompl/ompl_interface/include/moveit/ompl_interface/planning_context_manager.h:40,
from /home/ruinian/ws_moveit/src/moveit/moveit_planners/ompl/ompl_interface/include/moveit/ompl_interface/constraints_library.h:41,
... | {
"domain": "robotics.stackexchange",
"id": 28063,
"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, moveit, ompl, source",
"url": null
} |
c#, async-await, socket
private async Task ProcessSendAsync(CancellationToken token)
{
try
{
var reader = _send.Reader;
while (await reader.WaitToReadAsync(token).ConfigureAwait(false))
{
if (_socket.State != WebSocketState.Open)
... | {
"domain": "codereview.stackexchange",
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c#, async-await, socket",
"url": null
} |
CPhill May 27, 2015
#2
+18829
+13
The lines 3x+y=1 and 5x-y=15 intersect at the center of circle O. If the circle is tangent to the y-axis, find the equation of the circle.
$$\\ \small{\text{ (1. Line): \begin{array}{rcl} \\\\\\ 3x + y &=& 1 \\ y &=& \underbrace{-3}_{m_1}x + \underbrace{1}_{b_1} \\ \end{array} }} \... | {
"domain": "0calc.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9740426443092215,
"lm_q1q2_score": 0.8158775580889328,
"lm_q2_score": 0.8376199572530448,
"openwebmath_perplexity": 2385.4784158660523,
"openwebmath_score": 0.6269635558128357,
"tags":... |
javascript, html, css
Code:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Minesweeper</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="assets/css/normalize.css">
<link rel="stylesheet" href="assets/css/style.css">
... | {
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"id": 44857,
"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, css",
"url": null
} |
organic-chemistry, reaction-mechanism, synthesis
It seems that the OH groups of the ether molecule and That of the diethanolamine group react with water elimination to form the azacrown. But then what is the role of the other reagents?
What is the exact reaction mechanism? Please be detailed and show electron movement... | {
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"openwebmath_perplexity": null,
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"tags": "organic-chemistry, reaction-mechanism, synthesis",
"url": null
} |
php, rest, curl, phpunit
return $this;
}
/**
* Method to execute PUT on server
*
* @param string $action
* @param mixed $data
* @return RestClient
* @throws \InvalidArgumentException
* @throws \Exception
*/
public function put($action = null, $data = null) {
... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "php, rest, curl, phpunit",
"url": null
} |
special-relativity, lagrangian-formalism, variational-principle, action, point-particles
After this shift, we can now consistently take the non-relativistic limit $c\to\infty$ and derive the well-known formula for the non-relativistic kinetic energy
$$\begin{align} L~\stackrel{(2)}{=}~E_0(1-\gamma^{-1})~=~&\frac{1}{2}... | {
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"openwebmath_score": null,
"tags": "special-relativity, lagrangian-formalism, variational-principle, action, point-par... |
bash, shell
# Detect OS (OS X, Linux or Windows)
if [[ $uname = Darwin ]]; then
echo "Detected system: OS X"
OS=osx
ST_DIR="$HOME/Library/Application Support/Sublime Text 3/Packages/User/"
elif [[ $uname == *Linux* ]]; then
echo "Detected system: Linux"
OS=linux
ST_DIR="$HOME/.config/sublim... | {
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"openwebmath_score": null,
"tags": "bash, shell",
"url": null
} |
Which numbers correspond to the 2048bit length? Is it prime, exponent, coefficient...?
Only the modulus really - the key size is identical to the modulus size by definition. The primes are commonly half of the key size for calculations that use 2 primes (multi-prime RSA is faster and on the uptake). The private expone... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9381240108164656,
"lm_q1q2_score": 0.8337659584712673,
"lm_q2_score": 0.8887587875995482,
"openwebmath_perplexity": 4133.663707769341,
"openwebmath_score": 0.513649582862854,
"tags... |
solar-system, mars, planetary-atmosphere, planetary-science, atmospheric-escape
1though comments there suggests that's not necessarily a correct and/or complete explanation. Assuming most of the escaping Martian atmosphere is entrained in the solar wind, it will flow outward until it reaches the termination shock, and... | {
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"id": 5754,
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "solar-system, mars, planetary-atmosphere, planetary-science, atmospheric-escape",... |
quantum-mechanics, momentum, hamiltonian, eigenvalue, dirac-delta-distributions
\begin{equation}
\langle p | p'\rangle = \lambda^2 \langle E, \alpha | E', \alpha' \rangle
\end{equation}
Bringing everything together we have:
\begin{equation}
\delta(p-p') = \left[ \delta(p-p') + \delta(p+p') \right]\delta_{\alpha, \alph... | {
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"id": 77521,
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"tags": "quantum-mechanics, momentum, hamiltonian, eigenvalue, dirac-delta-distributions",
... |
prescribes a set of low-level routines for performing common linear algebra operations such as vector addition, scalar multiplication, dot products, linear combinations, and matrix multiplication. Numpy is one of the most used libraries in Python for I arrays manipulation. For example, a three by three permutation matr... | {
"domain": "com.tr",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9796676490318648,
"lm_q1q2_score": 0.8054720904238226,
"lm_q2_score": 0.8221891283434876,
"openwebmath_perplexity": 1287.0371048408572,
"openwebmath_score": 0.26150327920913696,
"tags": n... |
fft, matlab, cepstral-analysis
Title: High Level Process, Calculating Cepstrum When You Only Have Spectrum I am not a DSP expert, so I would like someone to check my thought process:
I have a text file representing the spectrum (calculated by some FFT hardware), and I'd like to calculate a cepstrum. I'm using Octave ... | {
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"tags": "fft, matlab, cepstral-analysis",
"url": null
} |
PDE: = ˘ x=0 x=L Thermal diffusivity (conductivity) Boundary Conditions We have to specify boundary. You can define an adiabatic wall by setting a zero heat flux condition. 5) is called the eigenvalue problem, a nontrivial solution is called an eigenfunc-tion associated with the eigenvalue λ. 1d Dirichlet boundary cond... | {
"domain": "auit.pw",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9886682478041813,
"lm_q1q2_score": 0.8128722891905571,
"lm_q2_score": 0.8221891327004133,
"openwebmath_perplexity": 666.6580393036137,
"openwebmath_score": 0.8180767297744751,
"tags": nu... |
field-theory, conventions, dirac-equation, dirac-matrices
My process: I started with Dirac equation $(i\gamma^\mu \partial_\mu-m)\psi=0$. Taking the Hermitian adjoint of Dirac equation, I got
$$
\psi^\dagger(-i(\gamma^\mu)^\dagger\partial_\mu-m)=0 \tag{2}
$$
As we all know, the hermitian adjoint of $\gamma^\mu$ is tha... | {
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"tags": "field-theory, conventions, dirac-equation, dirac-matrices",
"url": null
} |
optimization, deep-neural-networks, pytorch
Title: When should you not use the bias in a layer? I'm not really that experienced with deep learning, and I've been looking at research code (mostly PyTorch) for deep neural networks, specifically GANs, and, in many cases, I see the authors setting bias=False in some layer... | {
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "optimization, deep-neural-networks, pytorch",
"url": null
} |
python, csv
for i, m in zip(reader[1::2], reader[2::2]):
print(f'Question {i[1]}, Answer {m[1]}')
Hope this helps :) | {
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"openwebmath_score": null,
"tags": "python, csv",
"url": null
} |
c++, console, snake-game
bool move()
{
if (direction != Stop) {
int s = std::size(location);
for (int loop = s; loop > 1; --loop) {
location[loop - 1] = location[loop - 2];
}
}
switch (direction)
... | {
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"openwebmath_score": null,
"tags": "c++, console, snake-game",
"url": null
} |
7. Sometimes a picture helps.
(1 + a) is a constant value that shifts the graph of y = 2x^3-3x^2 up and down. What happens when a is non-zero and non-negative?
8. We can consider the function f defined by : f(x)=2x^3-3x^2+1+a on R show that it's increasing on ]-00,0]U[1,+00[ and decreasing on [0,1] and use the fact t... | {
"domain": "mathhelpforum.com",
"id": null,
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9871787838473909,
"lm_q1q2_score": 0.8070921771135088,
"lm_q2_score": 0.8175744761936437,
"openwebmath_perplexity": 304.43713948662395,
"openwebmath_score": 0.8184946179389954,
"ta... |
evolution, theoretical-biology, sexual-selection, palaeontology, extinction
This result is similar to another bird-centered study: Sexual Selection and the Risk of Extinction of Introduced Birds on Oceanic Islands": Denson K. McLain, Michael P. Moulton and Todd P. Redfearn. OICOS Vol. 74, No. 1 (Oct., 1995), pp. 27-34... | {
"domain": "biology.stackexchange",
"id": 1066,
"lm_label": null,
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"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "evolution, theoretical-biology, sexual-selection, palaeontology, extinction",
"ur... |
9. Aug 25, 2015
### axmls
$f(x)$ is the function $f$ evaluated at $x$. So it is a number, not a function.
This should usually be obvious from the context.
I think it's important to clear up the difference between the function $f$ and the number $f(x)$ precisely because the OP (like many students I've seen) does not... | {
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"id": null,
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9525741241296944,
"lm_q1q2_score": 0.8058228744334208,
"lm_q2_score": 0.8459424353665382,
"openwebmath_perplexity": 482.0235417969698,
"openwebmath_score": 0.8084807395935059,
"tag... |
ros, motoman-driver, motoman
MotoFit: Unfortunately, I don't know the internal mechanisms of this application since it was developed by our Japan office. So, I'm not 100% certain which API's it is accessing to perform it's function. But I suspect that it may conflict with the motion API used by MotoROS. Plus, it ap... | {
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"id": 29323,
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"tags": "ros, motoman-driver, motoman",
"url": null
} |
2. There is no need to consider a general element in the kernel. Instead you can argue as follows:
Let $$n$$ be the characteristic of $$R$$. Then $$\phi(n)=0_R$$ and hence $$n\cdot 1_R=n\cdot\phi(1_{\Bbb{Z}})=\phi(n\cdot1_{\Bbb{Z}})=\phi(n)=0_R.$$
3. For the converse you have by definition of the identity element of ... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9653811611608242,
"lm_q1q2_score": 0.8126826170077255,
"lm_q2_score": 0.8418256432832333,
"openwebmath_perplexity": 125.43665987228108,
"openwebmath_score": 0.9460005760192871,
"ta... |
c#, design-patterns, .net, linq, entity-framework
below is the code calling the data:
private void dgvOrders_SelectionChanged(object sender, EventArgs e)
{
DataGridView dgv = (DataGridView)sender;
if (dgv.SelectedRows.Count > 0)
{
if (dgvOrderItems.DataSource != null)
... | {
"domain": "codereview.stackexchange",
"id": 7209,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c#, design-patterns, .net, linq, entity-framework",
"url": null
} |
java
or better: Write a proper test using JUnit or alike.
public static boolean isSorted(List<Integer> l)
This doesn't do what the name promises. I'd expect a sorted list not to change after I call Collections.sort. Your list is descending. Moreover, it must be strictly descending. So the method name should express ... | {
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"tags": "java",
"url": null
} |
• Your construction looks promising. A function can be continuous at $x$ even if every neighbourhood of $x$ contains a point of discontinuity (e.g., let $f(x)$ be $0$ if $x$ is rational and be $x$ if $x$ is irrational, then $f$ is continuous at $0$). Try constructing the $\epsilon$-$\delta$ proof that your function is ... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9755769149165089,
"lm_q1q2_score": 0.8311454806980115,
"lm_q2_score": 0.8519527963298947,
"openwebmath_perplexity": 345.35574619203436,
"openwebmath_score": 0.8611320853233337,
"ta... |
conservation-laws, information, determinism
The Second Law says that entropy never decreases, and thus the whole universe is undergoing a mixing process (even though the microscopic laws are reversible).
[After having described how black holes seem to destroy infomration in contradiction to the second law] This means ... | {
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"openwebmath_score": null,
"tags": "conservation-laws, information, determinism",
"url": null
} |
cc.complexity-theory, complexity-classes, polynomial-hierarchy
Corollary 13:
If $\mathsf{PSpace} \neq \mathsf{PH}$, then there exist sets in $\mathsf{PSpace}$ which are not $\mathsf{PSpace\text{-}complete}$ w.r.t. $\leq^{\mathsf{P}}_T$ and which are not in the polynomial hierarchy.
Proof:
If $\mathsf{PSpace} \neq \mat... | {
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"openwebmath_score": null,
"tags": "cc.complexity-theory, complexity-classes, polynomial-hierarchy",
"url": null
} |
algorithms, search-algorithms
The polynomial algorithm (it is actually a linear algorithm) proceeds as follows:
Obtain the SCCs of $\mathcal{G_{I}}$ in linear time $O(n + m)$;
Assign True to each literal (Notice: not the variable) in the destination SCC (denoted $SCC_d$);
Delete $SCC_d$ and its corresponding source S... | {
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"openwebmath_score": null,
"tags": "algorithms, search-algorithms",
"url": null
} |
javascript, angular.js
Title: Producing a nested data set from flat data I have this example data :
var objects = [
{
title: "Parent Area",
code: "P",
areas: "B,C",
child: [],
selected: 0,
... | {
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"openwebmath_score": null,
"tags": "javascript, angular.js",
"url": null
} |
python, algorithm, graph
def _add_connection(
g, jug1, jug2, new_jug1, new_jug2, jug1_size, jug2_size):
if not _connection_exists(g, jug1, jug2, new_jug1, new_jug2):
g.add_edge((jug1, jug2), (new_jug1, new_jug2))
build_gallon_graph(g, new_jug1, new_jug2, jug1_size, jug2_size) | {
"domain": "codereview.stackexchange",
"id": 11818,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, algorithm, graph",
"url": null
} |
c++, array
public:
iterator begin() { return m_array2d; }
iterator end() { return m_array2d + rows*columns; }
// etc
T[rows*columns]& data();
T[rows*columns] const& data() const;
Then fill() becomes much simpler, using std::fill() on the flat view:
void fill(const size_type& value)
{
using std... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c++, array",
"url": null
} |
c#, parsing, language-design
while (tokenizer.Peek() != null && tokenizer.Peek().Position > memberPosition)
{
tokenizer.Get();
}
Reporter.Report(ErrorType.Error, "Invalid class member", currentLineNumber, currentPosition);
... | {
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"id": 28728,
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"openwebmath_score": null,
"tags": "c#, parsing, language-design",
"url": null
} |
light, luminosity, radiation
Which means that Irradiance is Flux divided by Area, so Radiant Flux has units of J/s and Irradiance has units of W m^-2 which I remember from my Optics class, then again Carroll & Ostlie say that:
That doesn't mean if Irradiance is equal to Radiant Flux divided by Area, so F = I*A that w... | {
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"url": null
} |
atmosphere, climate-change, co2
Also the value of the data is fitting the range of the $CO_2$ historic measurements on Earth.
By definition, a mole fraction is the ratio of mole of a given component (solute) over the total mole count in a target solution. In our case, this mean:
$mole\:fraction\:of\:CO_2= \frac{measur... | {
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"tags": "atmosphere, climate-change, co2",
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homework-and-exercises, special-relativity
So, we have:
$\gamma_u \tau_A = \Delta t = \gamma_u \Delta t'$
So, where you went wrong was writing $\Delta t' = \gamma \Delta t$ without checking to see if it made sense in this problem. This is why that equation gives the wrong answer.
Your conceptual issue seems to be wit... | {
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javascript, functional-programming, hash-map, underscore.js, lodash.js
I like using merge here because it describes what's happening very well. But I don't really like how much code is needed to combine a vector and a string into an object hash with keys as elements of the vector and values as the string:
_.mapValues(... | {
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The value of the integral will be largest on the largest interval for which the integrand is greater than or equal to zero: namely, the interval [0, 1].
Don't overthink this.
Don't overthink this.
I wouldn't if it was a drill problem, but as the high number indicates, it's in the "theory" part of the exercises, which... | {
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... |
perl, git
my $re = shift @ARGV;
@ARGV = split(/\n/, do {local $/; <stdin>}) if @ARGV eq 0;
for my $file (@ARGV) {
next unless -f $file;
if (-f "$file.bak") {
warn "[Warning] Backup file already exists and is been used by pie";
}
open my $fh, "<", $file;
open my $tmp, ">", "$file.bak";
... | {
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"tags": "perl, git",
"url": null
} |
electromagnetism, electric-current, electrical-resistance, voltage
Now here we can't apply $$R=\rho \frac{l}{A}$$
As we dont have finite area. In first one
We can get $V$ but still we can't find $R$ by Ohm's law beacause $I$ is not known. Any idea how to solve these ? (I don't expect a solution to the problems above ... | {
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with, to become comfortable with the ten vector space properties and to convince you that the multitude of examples justifies (at least initially) making such a broad definition as Definition VS. I realized that I didn't answer the question. The length is denoted j V. Three vector approach. Sign up to join this communi... | {
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"lm_q2_score": 0.8991213718636754,
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"openwebmath_score": 0.9481537938117981,
... |
python, file
# set modification times
for file_key in self._files_to_watch.keys():
self._files_to_watch[file_key] = stat(file_key).st_mtime
def run(self):
'''Parses command line arguments, processes files list,
and fires watchdog.'''
parser = argparse.ArgumentParser(des... | {
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"url": null
} |
proteins, protein-binding, purification
Size exclusion chromatography (gel filtration)
This technique is used to fractionate a mixture of molecules according to size. In this case the solid matrix that is used is charaterised by pores of a specific size. Proteins that are too large to enter the pores will pass through... | {
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"tags": "proteins, protein-binding, purification",
"url": null
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gravity, velocity, collision
Start whatever further schooling you need to become a research physicist. If you tell them you want to study granular materials I think you'll find funding; there are lots of industrial and civil-engineering applications.
Do an empirical test. The quantity of balloons you'll need for a sma... | {
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c#
private void ProcessData()
{
using (Stream outputStream = context.Response.OutputStream)
using (MemoryStream outputMemoryStream = new MemoryStream())
{
byte[] errorMessages;
long streamLength;
if (ValidateQueryString(co... | {
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forces, energy, photons, quantum-optics, photoelectric-effect
Title: What is the origin of optical force? In photoelectric effect a photon transfers its energy to an electron. Thus it does some work on an electron and work is always done via some force which in this case called optical force. I want to know what is th... | {
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"tags": "forces, energy, photons, quantum-optics, photoelectric-effect",
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} |
a diameter of 6 inches, find the length of DG and the area enclosed by lines FG and GD and arc FD. Advanced information about circles A line that intersects a circle in exactly one point is called a tangent and the point where the intersection occurs is called the point of tangency. I've managed to draw two tangent cir... | {
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"tags"... |
homework-and-exercises, newtonian-mechanics, momentum, conservation-laws
For example, with $\alpha = 120 \text { degrees}$, the balance of momenta is on the vertical direction:
$m_1v_1=m_2v_2\cos60 + m_3v_3\cos60$, with $\cos60=0.5$ and $m_1=m_2=m_3$ and $v_1=v_2=v_3$ then this is always true.
It's also true for the ... | {
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"tags": "homework-and-exercises, newtonian-mechanics, momentum, conservation-laws",
"url"... |
algorithm-analysis, runtime-analysis
advance first
end while
This algorithm takes two sorted ranges [first, middle) and [middle, last) and reorders them to produce a sorted range [first, last). The function compare is used to compare the elements. The algorithm more or less works like this: whenever an element in... | {
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"tags": "algorithm-analysis, runtime-analysis",
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} |
graph-theory, graph-algorithms, graph-isomorphism, np-complete
Title: Problem of graph bi-partition (related to graph isomorphism) I am considering the following problem:
Input: 3 graphs $G=(V,E)$, $H_1$, $H_2$
Question: Is there some $V_1\subseteq V$ such that $G[V_1]$ (the subgraph induced by $V_1$) is isomorphic t... | {
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"tags": "graph-theory, graph-algorithms, graph-isomorphism, np-complete",
"url": null
} |
array, regex, console, reflection, phpunit
/**
* Validation of php version.
* strictly equal to or greater than 7.4
* a minor version will kill any script.
*
*/
if (!version_compare(PHP_VERSION, '7.4', '>=')) {
die('IcarosNet\BOHBasicOutputHandler requires PHP ver. 7.4 or higher');
}
/**
* Validation of th... | {
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"tags": "array, regex, console, reflection, phpunit",
"url": null
} |
beginner, php, security, static, network-file-transfer
if($upload)
{
return true;
}
else
{
/**
* If file upload fails, the debug server enviroment as a last resort before giving 'Unknown error'
*/
$systemErrorCheck = self::che... | {
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"tags": "beginner, php, security, static, network-file-transfer",
"url": null
} |
java, swing, snake-game
food = point;
}
public void increaseScore() {
score=score+speed;
}
public int getScore(){
return score;
}
public void increaseSpeed(){
if(speed<10) {
speed += 1;
}
}
public void decreaseSpeed(){
if(speed>1) {
... | {
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quantum-mechanics, special-relativity, quantum-entanglement, locality, epr-experiment
The Schrödinger equation is unambiguous about how the wave function evolves, so if you have a device that sends spin up to the 4-5 part and sends spin down to the 1-2 part and the state has more spin up than spin down then the middle... | {
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ros, manifest.xml, rosbuild
Originally posted by Filipe Santos with karma: 346 on 2012-05-01
This answer was ACCEPTED on the original site
Post score: 0
Original comments
Comment by joq on 2012-05-01:
The usual procedure is "make clean" or "rosmake --pre-clean". | {
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formal-languages, turing-machines, finite-automata, undecidability, finite-sets
Perhaps you're confused about the incompleteness result. It states that there is no proof in ZFC of the continuum hypothesis or of its negation. Nevertheless, the continuum hypothesis is either true or false.
More formally, we can think of... | {
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"tags": "formal-languages, turing-machines, finite-automata, undecidability, finite-sets",
"url... |
object-oriented, vba, library, logging
Okay wow. I don't think that ignoring parameters sent into ILogMessageFormatter_FormatMessage is a very good idea. It will only lead to confusion for the maintainer. If you're forcing someone to pass parameters into a method, you should be using those parameters. I'll admit that ... | {
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"tags": "object-oriented, vba, library, logging",
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c++, image, template, classes, c++20
template<typename ElementT>
constexpr bool is_width_same(const Image<ElementT>& x, const Image<ElementT>& y)
{
return x.getWidth() == y.getWidth();
}
template<typename ElementT>
constexpr bool is_width_same(const Image<ElementT>& x, const Image<ElementT... | {
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machine-learning, neural-network, scikit-learn, mlp, dropout
To see this in context, skip to the complete code snippet below. You also need to edit _backprop so that it can accept layer_units:
def _backprop(self, X, y, activations, layer_units, deltas, coef_grads, intercept_grads):
"""Compute the MLP loss func... | {
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electrical-resistance, dimensional-analysis, si-units
Title: Definition of Ohm in SI basic units in words One way Wikipedia defines Ohm is (this is also teached in school):
$$1\Omega =1{\dfrac {{\mbox{V}}}{{\mbox{A}}}}$$
They describe this definition in words, too:
The ohm is defined as a resistance between two poin... | {
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(NOTES) 1. The argument of z is denoted by θ, which is measured in radians. abs: Absolute value and complex magnitude: angle: Phase angle: complex: Create complex array: conj : Complex conjugate: cplxpair: Sort complex numbers into complex conjugate pairs: i: … Consider the complex number $$z = - 2 + 2\sqrt 3 i$$, and ... | {
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"openwebmath_score": 0.9001246690750122,
... |
java, strings, programming-challenge, comparative-review
I was wondering how it compared to their solution:
public String notString(String str) {
if (str.length() >= 3 && str.substring(0, 3).equals("not")) {
return str;
}
return "not " + str;
}
Obviously neither is "wrong" but I was just wondering (in the... | {
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c++, performance, multithreading, processing
main.cpp
#include <iostream>
#include <string>
#include <chrono>
#include "utility.h"
#include "reader.h"
using namespace porous;
using namespace std;
using namespace std::chrono_literals;
int main() {
using namespace porous;
Reader r("../../big-graphene/test");
... | {
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"tags": "c++, performance, multithreading, processing",
"url": null
} |
c++, caesar-cipher
Would output:
Uryyb Jbeyq
Hello World
You could of course modify it to operate on a copy instead though. | {
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"tags": "c++, caesar-cipher",
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inorganic-chemistry, stability
What does this mean? The simplest explanation is that you can not fit five iodine atoms around a phosphorous atom.
Consider the pentachloride equivalent - this is already quite crowded. Since chlorine atoms have a smaller covalent radius than iodine, you can get five of them around the p... | {
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c++, algorithm, c++11
Works fine if I didn't mistype anything.
Questions:
Seeking overall improvements.
What is a right name?
Currently void. Is there anything useful to return?
I don't like passing lambda to std::partition. Any suggestions to avoid it?
A performance is weird. Regardless of a pivot selection strategy... | {
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go
will instead look more like this:
// assume the token is stored like this:
var tokenV atomic.Value
tokenV.Store(tokenStr)
token := tokenV.Load().(string) // get the token value
client.SetToken(token)
When refreshing the token, I'd probably pass in the expired token as an argument, so you can (atomically) check if... | {
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navigation, move-base
Original comments
Comment by Lorenz on 2012-11-11:
Probably, something with your configuration is wrong. move_base shouldn't have any problems planning paths as long as there exists one. Can you edit your post and add your move_base configuration?
Comment by Lorenz on 2012-11-12:
Are you sure tha... | {
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} |
fft, ofdm, ifft
Title: IFFT and OFDM upconversion I am trying to understand some basic concepts with IFFT as represented here OFDM Modem page 50-53, and 108-114.
Some basics that are represented -
The base sampling rate is 8khz.
The symbol period is 32ms, which would calculate to 250 total samples.
The fft size is 64.... | {
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special-relativity, material-science
As far as I know there are no GR theorems putting nice bounds on tension per density; all papers I have seen use the energy conditions.
Addendum:
There are theoretical arguments bounding the speed of sound in hadronic matter to less than $c/\sqrt{3}$. This in turn implies a maximal... | {
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "special-relativity, material-science",
"url": null
} |
javascript, css, gui
function selectTab(index) {
if (typeof index !== "number") {
index = indexOfElem(index);
}
var max = Math.min(
document.querySelectorAll(".tabs > div").length,
document.querySelectorAll(".tabs > ul > li").length
);
if (index < 1 || index > max) {
... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "javascript, css, gui",
"url": null
} |
c#, object-oriented, design-patterns, generics, interface
public FakerService()
{
_fakers = InitialiseFakers();
}
public IEnumerable<T> Generate<T>(int count) where T : class
{
var faker = GetFaker<T>();
return faker.Generate(count);
}
// Types which can be faked are r... | {
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"id": 32443,
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"tags": "c#, object-oriented, design-patterns, generics, interface",
"url": null
} |
From your picture, it seems an expansion at order $$2$$ will do. All functions should be expanded at the same order, using, say Taylor-Young's formula. Thus
• $$\mathrm e^{3x}=1+3x+\frac92x^2+o(x^2)$$,
• $$\sin x =x+o(x^2)$$,
• $$\cos x=1-\frac12 x^2+o(x^2)$$,
• $$\ln(1-2x)=-2x-\frac42 x^2+o(x^2)$$ Thus the numerator ... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9763105273220726,
"lm_q1q2_score": 0.8156913726783668,
"lm_q2_score": 0.8354835371034368,
"openwebmath_perplexity": 346.12745791830224,
"openwebmath_score": 0.8687930107116699,
"ta... |
image-processing, convolution, gaussian, sift
Though the Gaussian Kernel is radially symmetric its discrete approximation has a rectangle support. Unless this support will have infinite length a rotation by any angle different from a multiplication of 90 degrees will yield a shape which has to modified to fit a rectan... | {
"domain": "dsp.stackexchange",
"id": 1880,
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"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "image-processing, convolution, gaussian, sift",
"url": null
} |
homework-and-exercises, electric-circuits
So the circuit is solved by (I use 2nd Kirchhoff law by starting from up-left in each loop)
\begin{cases}
8R - i_1 R + 6 R - (i_1+i_2) R = 0 \\
- i_2 R + 6 R - i_2 R + i_1 R - 8 R = 0
\end{cases}
If $R\neq 0$ this system gives $i_1=6$ and $i_2=2$. All conditions are satisfie... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "homework-and-exercises, electric-circuits",
"url": null
} |
python, parsing, python-2.x
Reads whether a line is a tag, tag closer or text from a passage.
Close tags are ignored, tag data and passages are parsed into data."""
data = {}
with open(filepath) as f:
for line in f:
if line.startswith('</'):
# Closing tag, nothing to se... | {
"domain": "codereview.stackexchange",
"id": 16613,
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"lm_name": null,
"lm_q1_score": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, parsing, python-2.x",
"url": null
} |
geophysics, seismology, seismic
What I think you are seeing at that particular offset and traveltime is the Rayleigh-wave beginning to 'disperse' - AKA seismic dispersion beginning to manifests itself as a results of the wavefield convolving with layering and near-surface heterogeneity.
As for a refraction arrival, i... | {
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"openwebmath_score": null,
"tags": "geophysics, seismology, seismic",
"url": null
} |
string-theory, group-theory, conformal-field-theory, mathematics
The basic idea is that a black hole has a quantum structure. When gravity is strong we still don't know (at least not always) how to count and identify the microstates that give the entropy to the black hole. But in string theory black holes in the weak ... | {
"domain": "physics.stackexchange",
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"tags": "string-theory, group-theory, conformal-field-theory, mathematics",
"url": null
} |
c++, algorithm, programming-challenge, time-limit-exceeded, mathematics
A last point, you can put the two special cases out of the way early, instead of dragging them along until the end. So deal with multiples of k and k/2 at the first occasion, it also allows you to get rid of a certain number of elements.
To sum it... | {
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"tags": "c++, algorithm, programming-challenge, time-limit-exceeded, mathematics",
"ur... |
• "So for large $N$ almost all labeled graphs are connected" Surely that conclusion can be obtained in a much simpler way than with the full asymptotic. Jun 30, 2019 at 2:01
• @Olivier I'm curious about your statement as I have a growing interest in graph theory but I'm not a graph theorist. Might you know of an elemen... | {
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"lm_q1_score": 0.9766692264378963,
"lm_q1q2_score": 0.8242063712550054,
"lm_q2_score": 0.8438950966654772,
"openwebmath_perplexity": 506.3201513936738,
"openwebmath_score": 0.9014660120010376,
"tags... |
ruby, ruby-on-rails
# app/helpers/partials/application_container.rb
module ApplicationContainer
# ...
end
In particular at the beginning I was looking to have a file /app/helpers/_application_container_helper.rb that gave me uninitialized constant ApplicationHelper::ApplicationContainer (and different other errors ... | {
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"id": 294,
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "ruby, ruby-on-rails",
"url": null
} |
javascript, computational-geometry, mathematics
First of all, let's see how we can calculate the angle without having to do aD -= 270. We can accomplish this by mapping the axes strategically when calling atan2(). The direction for which we want the arctangent to be 0 is an "x′ axis" of our mapped plane, and the dir... | {
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"tags": "javascript, computational-geometry, mathematics",
"url": null
} |
Denote $$C := a^2 + b^2 .$$ Then, we can find an angle $$x_0$$ such that $$a = \sqrt{C} \cos x_0$$ and $$b = -\sqrt{C} \sin x_0$$. The angle sum formula for $$\sin$$ lets us rewrite the quantity in the inner parentheses of the integrand as $$a \sin x + b \cos x = \sqrt{C} \sin (x - x_0).$$ Then, appealing to the period... | {
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"lm_q1_score": 0.945801267121407,
"lm_q1q2_score": 0.8200435105118451,
"lm_q2_score": 0.8670357494949105,
"openwebmath_perplexity": 326.73071572746716,
"openwebmath_score": 1.0000001192092896,
"tag... |
meteorology, thunderstorm
Or thunderstorms can form along a frontal line that separates cold from warm air mass and that moves into the warm, moist air, causing it to rise to great height where it starts to condensate. This phenomenon is called a cold front or in a special form a squall line (radar image) and labiliza... | {
"domain": "earthscience.stackexchange",
"id": 2094,
"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": "meteorology, thunderstorm",
"url": null
} |
For any positive real number ${\gamma}$, a map ${f\colon E\rightarrow F}$ between metric spaces E and F is said to be ${\gamma}$-Hölder continuous if there exists a positive constant C satisfying
$\displaystyle d(f(x),f(y))\le Cd(x,y)^\gamma$
for all ${x,y\in E}$. The smallest value of C satisfying this inequality i... | {
"domain": "almostsuremath.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9828232909876816,
"lm_q1q2_score": 0.8147003759285792,
"lm_q2_score": 0.8289388167733099,
"openwebmath_perplexity": 196.22386267458265,
"openwebmath_score": 0.9254615306854248,
"t... |
c++
Title: Adding two binary numbers I want to improve this code with better logic and using STL.
#include <iostream>
#include <vector>
void addition(const std::vector<int>& A,
const std::vector<int>& B,
std::vector<int>& C)
{
int size_A = A.size();
int size_B = B.size();
in... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c++",
"url": null
} |
statistical-mechanics, hamiltonian-formalism, phase-space, ergodicity
Title: Question about ergodicity and the evolution of the probability distribution under Liouville's theorem According to Liouville's theorem, the probability distribution function $\rho$ evolve in phase space with
$$ \frac{d \rho}{d t} = \frac{\pa... | {
"domain": "physics.stackexchange",
"id": 53062,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "statistical-mechanics, hamiltonian-formalism, phase-space, ergodicity",
"url": n... |
performance, strings, linux, assembly, amd64
Micro-optimizations
Some of these instructions are ones you won't need after algorithmic changes, but in other functions you might still want to do something similar. Some of them will still be needed in different forms.
Prefer pointer-increments over indexed addressing mo... | {
"domain": "codereview.stackexchange",
"id": 43808,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "performance, strings, linux, assembly, amd64",
"url": null
} |
java, swing
c.gridx = 100;
c.gridy = 5;
aboutpanel.add(aboutmsg,c);
c.gridx = 100;
c.gridy = 100;
aboutpanel.add(aboutlabel,c);
c.gridx = 100;
c.gridy = 150;
aboutpanel.add(back2f1A,c);
//Credit page
creditpanel = new JPanel(new GridBagLayout());
creditmsg = new JLabel("Created by");
creditlabel = new JLabel("estomo,... | {
"domain": "codereview.stackexchange",
"id": 4739,
"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, swing",
"url": null
} |
descriptive-complexity
at time $0$, the tape contains the coding of $\cal{A}$, the head is at position $0$ (and the head is not anywhere else) and the machine is in its start state (and not in any other state) AND
if, at time $t$, the machine is in some configuration, then the configuration at time $t+1$ is what the d... | {
"domain": "cs.stackexchange",
"id": 2007,
"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": "descriptive-complexity",
"url": null
} |
python
def display_board(board):
"""
Takes the board list as an argument
and displays it as a Tic-Tac-Toe board
when the game is running
"""
display_board.row3 = "{0:^5s}||{1:^5s}||{2:^5s}".format(board[7],board[8],board[9])
display_board.row2 = "{0:^5s}||{1:^5s}||{2:^5s}".format(bo... | {
"domain": "codereview.stackexchange",
"id": 38074,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python",
"url": null
} |
enthalpy, heat, chemical-engineering
A rule of thumb: when in doubt about the enthalpies of any process, write down the process thoroughly, with temperatures and phases of all reactants and products. This way it becomes much clearer. It is also useful to remember that in the real world there is no such thing as "The E... | {
"domain": "chemistry.stackexchange",
"id": 11161,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "enthalpy, heat, chemical-engineering",
"url": null
} |
c#, beginner, mvc, controller
db.tb_CheckoutCheckin.Add(checkoutRecord);
db.tb_CheckoutCheckin.Add(checkoutRecord1);
db.tb_CheckoutCheckin.Add(checkoutRecord2);
db.SaveChanges();
ModelState.Clear();
var model = db.tb_CSUCheckoutCheckin.Whe... | {
"domain": "codereview.stackexchange",
"id": 23396,
"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, mvc, controller",
"url": null
} |
D obs. This video provides an intuitive explanation of the difference between Bayesian and classical frequentist statistics. There is a 95% probability that the population mean is in the interval 136. Specifically, when one is faced with. Frequentist probability or frequentism is an interpretation of probability; it de... | {
"domain": "erci.pw",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9822876976669629,
"lm_q1q2_score": 0.8120688227348857,
"lm_q2_score": 0.8267117919359419,
"openwebmath_perplexity": 1148.3731933812414,
"openwebmath_score": 0.7229945063591003,
"tags": n... |
rviz, ros-kinetic
Comment by pfontana96 on 2020-02-12:
It was solved by clearing the vector before adding the new frame's velocities (velocities.markers.clear()). I did not understand why would the lifetime set to 0.2s be an issue (as I know I'll receive new a new pointcloud at 0.2s I want old markers to be cleared at... | {
"domain": "robotics.stackexchange",
"id": 34417,
"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": "rviz, ros-kinetic",
"url": null
} |
php, mysql, php5
$array_superfish .= "<ul>";
foreach ($array_new[$tummahalleler_ilce_durum_kategori_unique] as $kategori) {
$array_superfish .= "<li><a><span class=\"menu-title\">";
$array_superfish .= $dizi[21][$kategori];
$array_sup... | {
"domain": "codereview.stackexchange",
"id": 945,
"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, php5",
"url": null
} |
electrostatics, boundary-conditions
while the text I am currently studying [1] defines $\phi$ via
$$\phi(\mathbf{r}) = \frac{1}{4\pi\varepsilon_0}\iiint_{\mathbf{r}' \in \mathbb{R}^3} \frac{\rho(\mathbf{r}')}{\|\mathbf{r}-\mathbf{r}'\|} dV' \ .$$
So why would you go all the way to a complicated partial differential eq... | {
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"id": 45072,
"lm_label": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "electrostatics, boundary-conditions",
"url": null
} |
c#, image, library, bitwise, steganography
public class SteganoBMP
{
//Embed a file in an image. Because Bitmap is an abstract representation of an image,
//it can then be saved in any image format. Though the file will not be retrievable from
//a lossy format.
public static Bitmap ... | {
"domain": "codereview.stackexchange",
"id": 9707,
"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#, image, library, bitwise, steganography",
"url": null
} |
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