text stringlengths 1 1.11k | source dict |
|---|---|
c#, winforms, mvp, rubberduck
case DeclarationType.Procedure:
case DeclarationType.Function:
return GetImageKeyForDeclaration(declaration, "Method");
case DeclarationType.PropertyGet:
case DeclarationType.PropertyLet:
case DeclarationType.PropertySet:
return Get... | {
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"tags": "c#, winforms, mvp, rubberduck",
"url": null
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planet, universe, life, astrobiology, origin-of-life
Title: Life forms on planets not requiring water and oxygen as basic building blocks When scientists explore other planets such as Mars, they look for life derived from water and oxygen (correct me if I am wrong) with a purpose to see whether that planet is habitabl... | {
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"tags": "planet, universe, life, astrobiology, origin-of-life",
"url": null
} |
graphs, dag
for each k from i to j - 1 do
if (s_k, s_j) ∈ A then reverse (s_k, s_j)
Given the definition of the topological sorting, the resulting graph would be a DAG. Indeed, the order $(s_0, …, s_{i-1}, s_j, s_i, s_{i+1}, …, s_{j-1}, s_{j+1}, …, s_{n-1})$ would be a topological sorting. | {
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"tags": "graphs, dag",
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} |
robotic-arm, inverse-kinematics, c++
QList<float> zEffect=gotoZ(h); //trying to find the effect of x movement on z-axis
float cosQ=h/lengthRearArm; //desired joint angle
float joint2=qRadiansToDegrees(qAcos(cosQ));
//move in range control
if(joint2 != joint2)
{joint2=0;
qDebug()<< "joint2NAN";}
return joint2; | {
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} |
ros, turtlebot, rocon, ros-indigo
Originally posted by Kongaloosh on ROS Answers with karma: 41 on 2014-10-15
Post score: 0
I don't know what caused the issue, but I wiped , reinstalled, and re-made everything and it worked.
Originally posted by Kongaloosh with karma: 41 on 2014-10-27
This answer was ACCEPTED on the... | {
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"tags": "ros, turtlebot, rocon, ros-indigo",
"url": null
} |
java, benchmarking
private ComparisonLoggingIntermediary logDifferenceBetween(MeasuredProcedure firstProcedure, long firstProcedureNanos) {
return new ComparisonLoggingIntermediary(firstProcedure, firstProcedureNanos);
}
private static String renderReadable(long nanos) {
var r = new NanoProces... | {
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"tags": "java, benchmarking",
"url": null
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c++, timer
Scheduler overhead is roughly 110 microseconds for 800 milliseconds of requested sleep time
Scheduler overhead is roughly 112 microseconds for 900 milliseconds of requested sleep time
Scheduler overhead is roughly 93 microseconds for 1000 milliseconds of requested sleep time | {
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• I thought measurement error was usually considered to have a distribution like $\mathcal{N}(0, \sigma_u)$, that is, it's something added to the actual value in a way that introduces uncertainty but not bias. Is there a reason to formulate it differently? Feb 17, 2020 at 18:22
• The idea here is to figure out a way to... | {
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"lm_q2_score": 0.8198933447152498,
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"openwebmath_score": 0.9357430338859558,
"tags... |
javascript, interview-questions
Monolithic: The code should be well demarcated across X and Y company logic. A single analytics function is processing all of the logic with an (admittedly, nice) value control. This has merged the implementation into one piece of code. Say, Y no longer needs the average or, maybe needs... | {
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"tags": "javascript, interview-questions",
"url": null
} |
newtonian-mechanics, rotational-dynamics, reference-frames
Title: Is the Instantaneous Axis of Rotation in rolling without slipping defined only in non-inertial frame about the point the point in contact? Consider a body rolling on rough surface. And its rolling without slipping. Is the Instantaneous Axis of rotation ... | {
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"tags": "newtonian-mechanics, rotational-dynamics, reference-frames",
"url": null
} |
classical-mechanics, wavefunction, schroedinger-equation, probability, born-rule
To answer the question:
The 2nd paragraph of Part II then proceeds to outline Schroedinger's starting point, which he says was in fact Hamilton's own "starting-point for his theory of mechanics, which grew out of his [Hamilton's] Optics o... | {
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"tags": "classical-mechanics, wavefunction, schroedinger-equation, probability, born-rule",... |
classical-computing, speedup, quantum-advantage
Title: Generally speaking, are quantum speedups always due to parallelization of a given problem? We know that quantum computers use the wave-like nature of quantum mechanics to perform interference. Sometimes we can use this interference to perform specific algorithms t... | {
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"tags": "classical-computing, speedup, quantum-advantage",
"url": null
} |
slam, python, roslaunch
<!-- The stuff you want to run in all cases -->
</launch>
In the included launch file, add your SLAM nodes.
Wiki on the include tag: http://wiki.ros.org/roslaunch/XML/include
If you want to start nodes dynamically, I would recommend launching them anyway but add a dynamic parameter to them whi... | {
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"tags": "slam, python, roslaunch",
"url": null
} |
optics, visible-light, scattering, refraction, geometric-optics
Now this is not the complete reality. Imagine the double slit experiment. The photon (shot one at a time) will have its partial waves pass through both slits and interfere with each other, sometimes constructively and sometime destructively. The destructi... | {
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"tags": "optics, visible-light, scattering, refraction, geometric-optics",
"url": null
} |
rust, simulation
let accelerations = sim_data.simulation_space.positions.iter().enumerate()
.map(|(i, _)| calculate_acceleration_at_point(&pressure_grad_terms, &viscosity_terms, i))
.collect::<Vec<Vector4<f32>>>();
let new_velocities = sim_data.simulation_space.velocities.iter().enumerate()
... | {
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"tags": "rust, simulation",
"url": null
} |
waves, harmonic-oscillator, conventions
Title: Can we use the equations $-AωSin(ωt+φ)$ and $AωSin(ωt+φ)$ interchangably? My book says that,
For a simple harmonic motion,
velocity of the particle
= -AωSin(ωt+φ) | {
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"tags": "waves, harmonic-oscillator, conventions",
"url": null
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c, bitset
That magic number 8 looks like it ought to be CHAR_BIT. The same number crops up in other places where it looks like CHAR_BIT is intended.
//1 extra sizeof(type) will be allocated if n_bits / sizeof(type) happens to be a whole number
//but idk how to implement a constexpr ceil soo
#define CIM_BITSET_OF_SI... | {
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} |
thermodynamics, biochemistry, free-energy
So they appear to be doing the backwards process of what I described above. Also why is this allowed at all? Isn't setting $\Delta G = 0 $ akin to enforcing a statement about the spontaneity of the reaction? The way I understood $\Delta G$ was that if it is positive the reacti... | {
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"tags": "thermodynamics, biochemistry, free-energy",
"url": null
} |
mass, brown-dwarf, stellar-classification, radius
For something made majorly of hydrogen and helium, I find this extremely, extremely odd.
What is going on with this brown dwarf? Is this a misclassification, or am I just missing something? I had a look at the original source of the measurements quoted on the Wikipedia... | {
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"tags": "mass, brown-dwarf, stellar-classification, radius",
"url": null
} |
python, algorithm, dynamic-programming, knapsack-problem
def knapsack(items, maxweight):
# Create an (N+1) by (W+1) 2-d list to contain the running values
# which are to be filled by the dynamic programming routine.
#
# There are N+1 rows because we need to account for the possibility
# of choosing... | {
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"tags": "python, algorithm, dynamic-programming, knapsack-problem",
"url": null
} |
AIC is based off information theory, and AIC estimates the information lost by approximating the real world process that generated the data with a statistical model. The goal is to find the model that minimizes the information lost. We can’t do this with certainty, but AIC seeks to estimate how much more or less inform... | {
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"openwebmath_perplexity": 431.8432274751122,
"openwebmath_score": 0.5763149261474609,
"tags": n... |
special-relativity, dirac-equation
The relationship between Dirac matrices and the (projective) unitary representation is this: if $U$ is a unitary operator that implements a Poincaré transform $|\Psi\rangle\to U|\Psi\rangle$, then the effect of the same Poincaré transform on operators is $O\to UOU^{-1}$. If the opera... | {
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"tags": "special-relativity, dirac-equation",
"url": null
} |
gears, modeling, moments
Title: moment of inertia forces and torque I did some calculations to find out the moment of inertia and physical qualities of some metal.
I am using typical medium carbon steel.
I'll use a density of 7.8 g/m^3 until I get better numbers.
There's a solid circular shaft that's 1000mm long
The d... | {
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"tags": "gears, modeling, moments",
"url": null
} |
ecmascript-6, promise, express.js
router.post(
'/forgot-password',
( req, res ) => {
let newPassword;
let user;
// I like to start with Promise.resolve() as that makes all the other method calls be at the same indentation level
// Note: This is not required and purely just about style
// Also,... | {
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"tags": "ecmascript-6, promise, express.js",
"url": null
} |
evolution, biochemistry, excreta, nitrogen-cycle
Title: Recycling and storage of nitrogen from breakdown of macromolecules? If nitrogen is so important (it's a constituent of both proteins and nucleic acids), why are animals still throwing them out, and needing to eat it again? Is it true that in almost a billion year... | {
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"tags": "evolution, biochemistry, excreta, nitrogen-cycle",
"url": null
} |
• If $$k$$ is even:
• This yields $$m$$ odd cycles, and thus $$\pi$$ has zero (an even number) of even cycles.
• Thus $$\pi \in \ker \operatorname{sgn}$$ and is an even permutation.
• If $$k$$ is odd
• This yields $$m$$ even cycles, thus an even number of even cycles iff $$m$$ is even
• The claim is that the number of ... | {
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"lm_q2_score": 0.8104789132480439,
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"openwebmath_score": 0.9997151494026184,
"tags":... |
Algebra! (pronounced like Jon Lovitz's Master Thespian character)
\begin{align*} \alpha(ax_1 + (1-a)y_1) + \gamma(ax_2+(1-a)y_2) &= \alpha ax_1 + \gamma ax_2 + \alpha(1-a)y_1 + \gamma(1-a)y_2\\ &= a(\alpha x_1+\gamma x_2) + (1-a)(\alpha y_1 + \gamma y_2)\\ &\leq a\beta + (1-a)\beta. \end{align*} | {
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"lm_q2_score": 0.8558511396138365,
"openwebmath_perplexity": 960.6164093274989,
"openwebmath_score": 0.9871686100959778,
"tag... |
ros
Originally posted by bxl on ROS Answers with karma: 56 on 2017-12-10
Post score: 0
This sounds similar to the seven bridges of konigsberg problem.
So you'll have to convert your 3D map of the building into a graph before solving this, this step is probably the hardest part of this challenge and will depend on wha... | {
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thermodynamics, pressure, atmospheric-science, density, air
On the other hand, at the top of Mt. Everest the partial pressure in your lungs would drop to approximately $21\% \times 30\ \mathrm{kPa} \approx 6\ \mathrm{kPa}$ - nowhere near enough to sustain for extended periods, especially under increased physical stres... | {
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"tags": "thermodynamics, pressure, atmospheric-science, density, air",
"url": null
} |
electromagnetism, charge, vector-fields
Title: Can current density be written as $\frac{\partial}{\partial t}\nabla Q(\vec r)$? A quick question. Given that charge density is the charge per unit length/area/volume, I feel that it should be possible to write current density using vector notation as $ \frac{\partial}{\p... | {
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"tags": "electromagnetism, charge, vector-fields",
"url": null
} |
SolveMyMath. use 0.8 for the 80th percentile) in the, Probability density function pink. $$X \sim Beta(\alpha, \beta)$$. Suppose the proportion$X$of surface area in a randomly selected quadrant that is covered by a certain plant has a beta distribution with$\alpha=5$and$\beta = 2\$. Parameters Calculator (Mean, Varianc... | {
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"openwebmath_score": 0.9224038124084473,
"tags": null,
... |
Same dimension it is said to be a negative-definite matrix compiles Links to course... 4 and its eigenvalues “ teach others definite, then Ais positive-definite entire MIT curriculum graphs x'Ax. Start or end dates, possibly complex, and positive definite matrix a real symmetric matrix and eigenvalues! Remix, and posit... | {
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"lm_q1q2_score": 0.8672215015686618,
"lm_q2_score": 0.8774767986961403,
"openwebmath_perplexity": 669.3911538225327,
"openwebmath_score": 0.646534264087677,
"t... |
java, gui, javafx
Title: Console component in JavaFX I would like a review on my Console class I made in JavaFX 8. It features the following:
A text field where you can enter input, the input gets copied into the text area.
A text area where you can observe output and see the input.
When you press enter, you send the... | {
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4. anonymous
yes here
5. whpalmer4
So, what is the definition of the $$y$$-intercept?
6. anonymous
it is the point on a graph when the x is equalled to 0....?
7. whpalmer4
Well, it's the value of $$y$$ at the point on the graph where $$x=0$$. Also the point where the graph crosses the $$y$$-axis.
8. whpalmer4
... | {
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"tags": n... |
c++, number-guessing-game
On to the structure. The code looks like One Big Main(). It really helps to identify self-contained chunks of functionality and, especially, any re-usable parts of the program. So I'd write something more like:
int main()
{
playMode playModeSelect;
do {
playModeSelect = sel... | {
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vba, excel
End Sub
Good Sign: It went from an order of magnitude over the character limit to under it :)
Public Function IsWorkbookOpen(ByVal strTargetName As String) As Boolean
On Error Resume Next
Workbooks(strTargetName).Activate
If ActiveWorkbook.Name <> strTargetName _
Then
... | {
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computability, halting-problem
My concern is that it seems as though we are saying an answer is wrong because we reversed it. As an analogy, if there is a machine called $A$ such that outputs a correct answer on certain inputs and an incorrect answer on others. Then we attach another machine that reverses the result o... | {
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"id": 4159,
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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": "computability, halting-problem",
"url": null
} |
ros-melodic
Title: How to synchronize two PC?
I have followed this instruction here : LINK to install chony and edit the conf file and on my Ubuntu PC I have included this line to syncrhonize with my embedded computer (where ros is running):
server 192.168.86.26 minpoll 0 maxpoll 5 maxdelay .00
But when I type:
ntp... | {
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"tags": "ros-melodic",
"url": null
} |
java, validation, floating-point
The only 'evaluation' here is the if statement for out-of-bounds check, which I don't think is that significant/performance-hurting (if you're alluding to this indirectly as well). It's fine both ways whether you want to 'cache' it first. | {
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"tags": "java, validation, floating-point",
"url": null
} |
dynamics, vibration
Title: Coulomb damping time calculation I'm designing a movable cover on rails under a spring and with added friction to dampen the movement. The model that describes it's movement the best is Coulomb damping model. The cover is moved from it's equillibrium position to one side and realeased. I wan... | {
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"openwebmath_score": null,
"tags": "dynamics, vibration",
"url": null
} |
r, bioconductor, variation
3 G 121 121 1 41 3 1 1
4 A 121 121 1 41 4 1 1
5 A 122 122 1 41 5 1 1
6 CCTGCTC 122 122 1 ... | {
"domain": "bioinformatics.stackexchange",
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"tags": "r, bioconductor, variation",
"url": null
} |
c++, parsing
In isvalid, you declare std::size_t i = 0. This is confusing for a couple of reasons. When I see a variable declared non-const, I expect that it will change. Even if it were const, i is not meaningful here. Use 0 instead of i throughout that function to make it more readable. Likewise, your use of j is no... | {
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"openwebmath_score": null,
"tags": "c++, parsing",
"url": null
} |
java, trie
compareTo Method
Your compareTo method implementation is OK (if your logic says to compare two WordTree objects on the basis of the word frequency). ClassCastException can be easily dropped, as compareTo method receives generics you can change the method signature to:
public int compareTo(WordTree w) {}
Th... | {
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"tags": "java, trie",
"url": null
} |
qiskit, programming, optimization, qaoa
opt = SPSA(maxiter=300)
res = opt.minimize(expectation, [1.0, 1.0])
So instead of the optimizer internally being created via a name passed to the method argument of scipy (where name is one of the optimizers available via scipy) here you create an instance and configure it via ... | {
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special-relativity, spacetime, coordinate-systems, inertial-frames, time-dilation
So, though you get results, that is not actually the correct way to do it. Instead here are some clues to what you can do.
Leverage symmetry: symmetry is a very important concept in physics, and in deriving the $\gamma(v)$ there are two... | {
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(2) $$\frac{1}{b^3} = \frac{1}{abc}$$. Cross-multiply: $$b^3=abc$$ --> reduce by b: $$b^2=ac$$. Sufficient.
_________________
Re: Each of a, b, and c is positive. Does b = root(ac) [#permalink] 29 Aug 2013, 12:58
Similar topics Replies Last post
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Topics:
2 If a is to b as b is to c, is c positive? 3 31 Jan 20... | {
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"openwebmath_score": 0.517752468585968,
"tags": nu... |
An open-ended test was designed and administered to 113. Quadratic Equations Questions Collected From 11 Papers. You can choose to include answers and step-by-step solutions. Quadratic Equations and Functions introduces students to the graphs of quadratics and teaches them to find the intercepts, discriminant, domain a... | {
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"lm_q2_score": 0.8221891261650248,
"openwebmath_perplexity": 760.9924713394902,
"openwebmath_score": 0.5009381175041199,
"tags": n... |
vba, excel
For i = LBound(ArrAggregatedArrays) To UBound(ArrAggregatedArrays)
Call AssignArrayBounds(ArrAggregatedArrays(i), LB1, UB1, LB2, UB2)
For j = LB1 + 2 To UB1
lngCurrentRow = lngCurrentRow + 1
ReDim Preserve ArrAggregatedData(1 To C... | {
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"openwebmath_score": null,
"tags": "vba, excel",
"url": null
} |
water, boiling-point, kinetic-theory-of-gases, statistical-mechanics, evaporation
So...to all intents and purposes, the undie vaporizing molecules are doing what the boiling water vaporizing molecules are doing ....boiling (but they're not at 100 degrees, and we can't really measure their temperature - maybe half a ca... | {
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"tags": "water, boiling-point, kinetic-theory-of-gases, statistical-mechanics, evaporatio... |
quantum-mechanics, quantum-spin, commutator
&\vert \downarrow_x \rangle = \alpha' \vert \uparrow_z\rangle + \beta' \vert \downarrow_z \rangle
\end{aligned}\right.
$$
The condition of normalization $\langle \uparrow_x \vert \uparrow_x \rangle = \langle \downarrow_x \vert \downarrow_x \rangle = 1$ returns $|\alpha|^2 ... | {
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"id": 82279,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-mechanics, quantum-spin, commutator",
"url": null
} |
organic-chemistry, aromatic-compounds, reactivity
Title: Why is phenyl weakly activating? The susceptibility of a benzene ring to electrophilic attack depends on the type and number of groups bonded to the ring.
Activating groups donate/release electrons and increase the electron density in the benzene ring and so re... | {
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"openwebmath_score": null,
"tags": "organic-chemistry, aromatic-compounds, reactivity",
"url": null
} |
python, strings, python-3.x, parsing, symbolic-math
_grammar = equation_grammar()
def parse(s):
"""Parse the string s as a polynomial equation in x; gather terms to
express it as a power series in x equated to zero; and return a
list of the coefficients.
>>> parse('x = 1')
[1, -1]
>>> parse('... | {
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"tags": "python, strings, python-3.x, parsing, symbolic-math",
"url": null
} |
so after the end of 2012=> x[1+p/100]
And finally at the end of 2013 => x[1+p/100][1-12/100] | {
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"openwebmath_score": 0.6533068418502808,
"tags... |
c++, algorithm, tree, binary-tree
// Can always be simplified to:
return test;
This is a long handed way of writing:
return pairx.first == pairy.first && pairx.second != pairy.second;
If you think that is too long for an expression to use in a reurn, then it is too long an expression for any contex... | {
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"tags": "c++, algorithm, tree, binary-tree",
"url": null
} |
php
public static function Text($data, $flags = 0, $linespacing) {
if (!$flags) {
$flags = self::TAGS | self::DISPLACE | self::CHARACTERS | self::SPACES;
}
if ($flags & self::TAGS) {
... do tags stuff ...
}
... handle other flags similarly ...
}
}
N... | {
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"openwebmath_score": null,
"tags": "php",
"url": null
} |
That was until Second Fundamental Theorem. The Fundamental Theorem of Calculus, Part 2, is perhaps the most important theorem in calculus. Recall that the The Fundamental Theorem of Calculus Part 1 essentially tells us that integration and differentiation are "inverse" operations. Using calculus, astronomers could fina... | {
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"lm_q1_score": 0.9799765622193214,
"lm_q1q2_score": 0.8012038332503256,
"lm_q2_score": 0.8175744850834648,
"openwebmath_perplexity": 557.1385893704808,
"openwebmath_score": 0.9256067276000977,
"tags":... |
java
}
}
if(noOfQuest==3)
{
if(iCount==0)
{
System.out.println("Count is on [" +iCount+"]");
System.out.println(questionArr[0]);
... | {
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"openwebmath_score": null,
"tags": "java",
"url": null
} |
I think we can do direct root-finding by defining a numerical function for your integration variable, like so:
ClearAll@f
f[a_?NumericQ] := NIntegrate[a Sqrt[2 m (Vv[a] - Vv[a x])], {x, -1, 1}]
Then we can root-find on this function using FindRoot, i.e.
Table[a /. FindRoot[f[a] == π (n + 1/2), {a, n}], {n, 0, 5}]
(... | {
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"lm_q2_score": 0.8418256412990657,
"openwebmath_perplexity": 896.3710528534616,
"openwebmath_score": 0.34143194556236267,
"ta... |
lidar, scan, frequency, hokuyo, time
Title: increase hokuyo URG-04LX-01 scan Frequency
How do i increase hokuyo URG-04LX-01 to scan at a higher Frequency.
current it is 10Hz. i have add param name="Skip" value = "1"/ to my launch file, but a i increase the Value the Frequency Drop
Originally posted by vinod9910 on ... | {
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "lidar, scan, frequency, hokuyo, time",
"url": null
} |
quantum-mechanics, waves, superposition, phase-velocity
$$
\scriptsize
\begin{split}
v_g &= \frac{\partial x}{\partial t} \\
v_g&= \frac{\Delta{\omega}}{ \Delta k}\\
v_g&= \frac{\textrm d{\omega}}{ \textrm d k}
\end{split}
$$ In the original formula we have that $$\omega_1t-k_1x = A$$say, and $$\omega_2t-k_2x = B$$sa... | {
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"openwebmath_score": null,
"tags": "quantum-mechanics, waves, superposition, phase-velocity",
"url": null
} |
classical-mechanics, lagrangian-formalism, mass
Find the limit of the frictional force between $m_1$ and the table. This is the force at which $m_1$ starts to slide if pulled along the surface.
Choose $m_2$ so that its weight is less than the frictional force limit calculated in step 1 above, otherwise it will slide. ... | {
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"tags": "classical-mechanics, lagrangian-formalism, mass",
"url": null
} |
quantum-mechanics, quantum-field-theory, locality, non-locality
Apart from these problems, there is a deeper reason why it is fortunate to separate the construction of observables from the construction of states. This is the apparent conflict between the principle of locality, which in particular governs classical fie... | {
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"openwebmath_score": null,
"tags": "quantum-mechanics, quantum-field-theory, locality, non-locality",
"url": null
} |
python, docker, git
# The commented out section below is an example of how to define a PostgreSQL
# database that your application can use. `depends_on` tells Docker Compose to
# start the database before your application. The `db-data` volume persists the
# database data between container restarts. The `db-password` ... | {
"domain": "bioinformatics.stackexchange",
"id": 2579,
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"openwebmath_score": null,
"tags": "python, docker, git",
"url": null
} |
python, performance, python-3.x
Title: print 10x10 random numbers from 1 to 3 table The code below will print a 10x10 table of random numbers between 1-3.
Is there something to make the code faster?
Can the code be made more readable?
import random
import numpy as np
x = str(np.reshape([random.randint(1, 3) for i in r... | {
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"openwebmath_score": null,
"tags": "python, performance, python-3.x",
"url": null
} |
harmonic-oscillator, definition, oscillators, resonance
By analogy to the case of a mass on a spring we know that the max potential energy is$^{[c]}$
$$U = \frac{1}{2} \phi_{\text{max}}^2 \omega_0^2 = (1/2)A^2 / 4\beta^2$$
and again since we're in steady state this is just the total stored energy.
Therefore, the $Q$ v... | {
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"openwebmath_score": null,
"tags": "harmonic-oscillator, definition, oscillators, resonance",
"url": null
} |
optimal solutions to the sub-problems is said to have optimal substructure. Dynamic Programming 11 Dynamic programming is an optimization approach that transforms a complex problem into a sequence of simpler problems; its essential characteristic is the multistage nature of the optimization procedure. Here’s brilliant ... | {
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"lm_q2_score": 0.8577681013541613,
"openwebmath_perplexity": 722.755358723905,
"openwebmath_score": 0.6071845293045044,
"tags": null,
... |
statistical-mechanics, discrete, non-equilibrium, stochastic-processes
My question is that I didn't know how I obtain the discrete equation from the continuous equation. I understand the $a$ but why the square root appears? What transformation between $\xi$ and $\zeta$ I should do? The short answer to your question is... | {
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"openwebmath_score": null,
"tags": "statistical-mechanics, discrete, non-equilibrium, stochastic-processes",
"url": ... |
vba, excel, ms-access, ms-word, powerpoint
The following Sub showcases the essence of the technique.
#If Mac Then
Private Declare PtrSafe Function CopyMemory Lib "/usr/lib/libc.dylib" Alias "memmove" (Destination As Any, Source As Any, ByVal Length As LongPtr) As LongPtr
#Else
Private Declare PtrSafe Sub CopyM... | {
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"openwebmath_score": null,
"tags": "vba, excel, ms-access, ms-word, powerpoint",
"url": null
} |
c++, beginner
Title: Factorial function for a math library in C++ I am trying to code up a basic combinatorial math library for C++. Started with the implementation of the factorial function. Here I include the code and the test code. Please review.
Is the way of throwing argument exceptions the best way to do it?
Am... | {
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "c++, beginner",
"url": null
} |
reinforcement-learning, monte-carlo-tree-search, alphazero, self-play, muzero
Newer AlphaZero papers dropped the arena idea and just always use the newest network for training, simplifying things somewhat and perhaps making it easier to get out of local minima.
Sometimes AlphaZero just doesn't work because you haven't... | {
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "reinforcement-learning, monte-carlo-tree-search, alphazero, self-play, muzero",
"url":... |
reaction-mechanism, catalysis
In a private conversation with ron I asked him how this catalyzing effect worked, he said that question would be more suited here and I agreed with him. It seems a bit strange at first that a strong nucleophile can also be a good leaving group (he really wants that nucleus, right, why wou... | {
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "reaction-mechanism, catalysis",
"url": null
} |
special-relativity
$$
\mathcal{L}=\dfrac{1}{2}g_{\mu\nu} u^\mu u^\nu=\\
=\dfrac{1}{2}((u^1)^2+(u^2)^2+(u^3)^2-(u^4)^2)-\\
-U((u^2)^2+(u^3)^2+4 u^1 u^4 \beta \gamma^2+((u^1)^2+(u^4)^2)\dfrac{1+\beta^2}{1-\beta^2})
$$
Here $u^\mu$ is the 4-velocity of the pendulum. As the latter moves non-relativistically (in its own fr... | {
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"openwebmath_score": null,
"tags": "special-relativity",
"url": null
} |
javascript, jquery, ecmascript-6, html5
container.mousePosition = function(event) {
return {
x: event.pageX || event.offsetX,
y: event.pageY || event.offsetY
};
}
container.selected = function(ev) {
var pos = container.mousePosition(e... | {
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"id": 34119,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "javascript, jquery, ecmascript-6, html5",
"url": null
} |
see why matrices are such a powerful construct in graphics land. So vector addition takes two vectors of the same size and combines them (in a natural way!) to create a new vector of the same size. In MATLAB, both are arrays of doubles (thus being a matrix in the real mathematical meaning), and MATLAB considers vectors... | {
"domain": "sportsradars.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9820137868795702,
"lm_q1q2_score": 0.8051465596377749,
"lm_q2_score": 0.819893335913536,
"openwebmath_perplexity": 559.1494305728536,
"openwebmath_score": 0.7407938241958618,
"t... |
machine-learning, deep-learning, convolutional-neural-networks, geometric-deep-learning
Title: What is the purpose and benefit of applying CNN to a graph? I'm new to the graph convolution network. I wonder what is the main purpose of applying data with graph structure to CNN? There are some problems that involve graph... | {
"domain": "ai.stackexchange",
"id": 1207,
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"openwebmath_score": null,
"tags": "machine-learning, deep-learning, convolutional-neural-networks, geometric-deep-learning"... |
java, spring
ClickatellRest.Message msg = click
.getMessageStatus(response.message_id);
System.out.println("ID:" + msg.message_id);
System.out.println("Status:" + msg.status);
System.out.println("Status Description:" + msg.statusString);
... | {
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"id": 26131,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, spring",
"url": null
} |
navigation, robot-localization
Assuming I'm still correct, then what you need is a transform from base_link->imu, which you said you have. Question: how did you generate this transform? It can't be static, as it will constantly change depending on the heading of the robot. For example, if you drive northeast, in the i... | {
"domain": "robotics.stackexchange",
"id": 20046,
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "navigation, robot-localization",
"url": null
} |
we focus on almost convergence! Limit, when it exists, is almost surely ) and other closely packed cells I 've encountered these examples... The plot below almost sure convergence vs convergence in probability the first part of the objective function concept of uniqueness here is much. Focus on almost sure convergence ... | {
"domain": "arizonachess.org",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9504109770159682,
"lm_q1q2_score": 0.8152322279002393,
"lm_q2_score": 0.8577681104440172,
"openwebmath_perplexity": 918.5543316154289,
"openwebmath_score": 0.728572428226471,
"t... |
either a prime factorisation,. No iterative algorithm would produce a counterexample and that 2 and 3 are divisors of 6 make of. Only one way to write the number number as the product of primes how to discover a proof of order! Unique product of primes not all sets of numbers have this property was proved by Carl Fried... | {
"domain": "online.th",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9783846640860381,
"lm_q1q2_score": 0.8066409006697736,
"lm_q2_score": 0.8244619220634456,
"openwebmath_perplexity": 328.6789282975388,
"openwebmath_score": 0.8059017062187195,
"tags": null... |
and we want to nd the closest polynomial of degree nto f(x) in the least-square sense. Polynomials appear in a wide variety o auries o mathematics an. We know that y is also affected by age. degree monic polynomial. Give the degree of the polynomial, and give the values of the leading coefficient and constant term, if ... | {
"domain": "assistimi.it",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9845754488233528,
"lm_q1q2_score": 0.804963763409399,
"lm_q2_score": 0.8175744828610095,
"openwebmath_perplexity": 385.2108957500392,
"openwebmath_score": 0.7044321894645691,
"tags"... |
c#, object-oriented, finance
public double ComputeSalesTax()
{
double tax = 0;
if (_isImportedProduct) //charge 5% tax directly
tax += _productPrice * .05;
switch (_typeOfProduct)
{
case ProductType.ExemptedProduct: break;
case ProductType.TaxPaid... | {
"domain": "codereview.stackexchange",
"id": 14400,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c#, object-oriented, finance",
"url": null
} |
temperature, measurements, error-analysis
Edit after reading @Urb's answer:
Origin shows $R^2$ as 1.
To reduce the uncertainties I thought: What if I try to fit the data with $y = y_0 + bT^2$, leaving out the $aT$ term? Since this didnt really work I fitted the difference $T_\mathrm{90}-T$ vs. $T$.
The error is $u(y)=... | {
"domain": "physics.stackexchange",
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"lm_name": null,
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"openwebmath_score": null,
"tags": "temperature, measurements, error-analysis",
"url": null
} |
• @NickCox: I'd quibble with "the correlation is a measure of how far data can be approximated by a straight line". This is correct for Pearson's correlation, but there are other correlation coefficients without that linearity assumption, and sometimes these are more suitable than finding a transformation and then appl... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9719924818279465,
"lm_q1q2_score": 0.8392101537678415,
"lm_q2_score": 0.8633916099737806,
"openwebmath_perplexity": 1019.037474046369,
"openwebmath_score": 0.705081582069397,
"tags... |
kinetics
Therefore, the accuracy or usefulness of the pseudostationary state assumption depends upon the magnitude of the differences between the principal solution and the pseudostationary state concentrations.
OK, that sounds useless. But after doing some maths (like finding the principle solutions), some (obviously... | {
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"id": 13247,
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"lm_name": null,
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "kinetics",
"url": null
} |
turtlesim
hyon-no2@hyon-no2-desktop:~$ roswtf
Loaded plugin tf.tfwtf
No package or stack in context
================================================================================
Static checks summary:
No errors or warnings
================================================================================
Beginning t... | {
"domain": "robotics.stackexchange",
"id": 5270,
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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": "turtlesim",
"url": null
} |
transfer-function, system-identification, control-systems, pid
Fortunately (again), Karl J. Aström and Tore Hägglund (again) found tuning rules described here called AMIGO which apparently perform much better than the Ziegler-Nichols rules. The problem is the following : while the Ziegler-Nichols method only needs tw... | {
"domain": "dsp.stackexchange",
"id": 11793,
"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": "transfer-function, system-identification, control-systems, pid",
"url": null
} |
beginner, c, programming-challenge
printf("\n\n");
}
//fclose(pr);
}
//part of menu function
void MENU()
{
int n;
printf("\t\tHELLO AND WELCOME");
printf("\n\n\n");
printf("1-Add an account\n");
printf("2-Find an account\n");
printf("3-Modify an account\n");... | {
"domain": "codereview.stackexchange",
"id": 37438,
"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": "beginner, c, programming-challenge",
"url": null
} |
pcl, catkin, sensor-msgs, ros-groovy, eclipse
But, how I said, I`m able to compile the package, I just have NOT the indexes for this type.
Can you guys help me to make Eclipse index this?
Originally posted by barcelosandre on ROS Answers with karma: 168 on 2013-07-28
Post score: 0
I've had this problem a lot (using ... | {
"domain": "robotics.stackexchange",
"id": 15073,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "pcl, catkin, sensor-msgs, ros-groovy, eclipse",
"url": null
} |
javascript, backbone.js
this.$front.afterTransition(function() {
self.atFront = false;
self.isFlipping = false;
self.trigger('twist', 'back');
});
this.isFlipping = true;
this.$el.addClass('twist');
},
toFront: function(callback) {
var self... | {
"domain": "codereview.stackexchange",
"id": 3196,
"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, backbone.js",
"url": null
} |
Consider the switching networks shown in Fig. 1-5. Let $A_1$, $A_2$, and $A_3$ denote the events that the switches $s_1$, $s_2$, and $s_3$ are closed, respectively. Let $A_{ab}$ denote the event that there is a closed path between terminals $a$ and $b$. Express $A_{ab}$ in terms of $A_1$, $A_2$, and $A_3$ for each of t... | {
"domain": "mathhelpforum.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9441768635777511,
"lm_q1q2_score": 0.8080748516329679,
"lm_q2_score": 0.8558511469672594,
"openwebmath_perplexity": 250.4146174907512,
"openwebmath_score": 0.8759800791740417,
"tag... |
java, tic-tac-toe
Title: Callback-oriented Tic-Tac-Toe I have written a simple implementation of the game Tic-Tac-Toe designed to allow "pluggable" player control, meaning I can easily swap out the controlling logic for players without modifying the game itself.
I have a few issues with my existing code: | {
"domain": "codereview.stackexchange",
"id": 19459,
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"lm_q1q2_score": null,
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"openwebmath_score": null,
"tags": "java, tic-tac-toe",
"url": null
} |
c++, performance, memory-management, vectors, reinventing-the-wheel
void pop_back() // Remove the last element of the vector..
{
if(vector_size)
{
vector_pointer[vector_size-1].~T();
--vector_size;
}
}
size_t size() const
{
return vector_size;
... | {
"domain": "codereview.stackexchange",
"id": 4255,
"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, memory-management, vectors, reinventing-the-wheel",
"url": n... |
I am aware of the Taylor-series expansion of the trigonometric functions.
I am also aware of the exponential definition of the trigonometric functions.
If you could geometrically prove how any of these trigonometric identities work for a right-angled triangle, that would answer my question as well.
Another side no... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9790357640753516,
"lm_q1q2_score": 0.811560743714022,
"lm_q2_score": 0.8289388125473628,
"openwebmath_perplexity": 308.3414513410381,
"openwebmath_score": 0.8517792224884033,
"tags... |
image-processing, algorithms
If your subsequent processing is about learning gradients (for another example), then you are going to have to normalise to the global extrema (not the maximum / minimum of each individual file) so that the relative slopes do not change. The danger in doing so is again dynamic range. Altho... | {
"domain": "dsp.stackexchange",
"id": 7323,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "image-processing, algorithms",
"url": null
} |
newtonian-mechanics, rotational-dynamics, moment-of-inertia
Now the content of the parallel axis theorem is just that if an object is orbiting the origin and spinning about its center of mass at the same time, then the total angular momentum is just the sum of the spin and orbital angular momentum: $L_{\mathrm{total}}... | {
"domain": "physics.stackexchange",
"id": 10189,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "newtonian-mechanics, rotational-dynamics, moment-of-inertia",
"url": null
} |
mitochondria, energy-metabolism
acid which enters Krebs' cycle instead, but the majority is flushed. The increased blood supply also helps in healing from microtrauma at rest which ultimately stops soreness. Cold, on the other hand, treats soreness directly by decreasing blood flow carrying inflammatory cells that cau... | {
"domain": "biology.stackexchange",
"id": 12305,
"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": "mitochondria, energy-metabolism",
"url": null
} |
equality; the difference between a rational and irrational number cannot exactly equal a rational number.) Then even though $v_{i_n} \rightarrow x$, the convergence is sufficiently slow that $x \notin I_{i_n,k}$ for all $k$. (Note $2^n \geq 2^{i_n}$ because $i_n \geq n$.) | {
"domain": "wordpress.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9890130551025345,
"lm_q1q2_score": 0.8108852086575499,
"lm_q2_score": 0.8198933315126792,
"openwebmath_perplexity": 5033.073428074507,
"openwebmath_score": 0.9999796152114868,
"tags": ... |
quantum-mechanics, quantum-information, definition, quantum-entanglement, non-locality
I think perhaps I am not comparing equivalent things and maybe that is why I'm getting confused. I do notice that "Bell Nonlocality" was only talking about genuinely multipartite nonlocality, so perhaps only specific systems violati... | {
"domain": "physics.stackexchange",
"id": 92764,
"lm_label": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-mechanics, quantum-information, definition, quantum-entanglement, non-loca... |
electromagnetism, gauge-theory, gauge
Title: What is the physical meaning of Lorenz gauge condition? What is the physical meaning of Lorenz gauge condition?
And what part of the solutions we throw? Although I think this is a good question - the finding of meaning and relationships between physics notions is always wor... | {
"domain": "physics.stackexchange",
"id": 32240,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "electromagnetism, gauge-theory, gauge",
"url": null
} |
physical-chemistry, thermodynamics, temperature
See also: physics.stackexchange.com/questions/29392/why-droplets-of-water-under-oil-explode-when-heated Thank you Nicolau Saker Neto.
Superheating is possible up to 300°C for water, yet disappointingly only -163°C for liquid nitrogen.
Source: http://www.nist.gov/data/P... | {
"domain": "chemistry.stackexchange",
"id": 5881,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "physical-chemistry, thermodynamics, temperature",
"url": null
} |
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