text stringlengths 1 1.11k | source dict |
|---|---|
The maximum value of the sum is $$1^2+2^2+3^2+4^2+5^2+6^2+7^2+8^2=204$$ and the target value is $44$ less than this.
A transposition switching $a$ and $b$ reduces the total by $$a^2+b^2-ab-ba=\frac 12\left((a-b)^2+(b-a)^2\right)[=(a-b)^2]$$ Note we want the first form here and not the simplest, as will appear later.
... | {
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"lm_q2_score": 0.8333245891029457,
"openwebmath_perplexity": 298.06577002856255,
"openwebmath_score": 0.7287125587463379,
"ta... |
everyday-life
Now let's say there are many such flakes which are isolated from each other on the surface. Let's start strirring the milk in a random fashion and not necessarily in a circular manner. As you stir randomly, the flakes start moving in random directions on the surface of milk. Some may move toward each oth... | {
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"openwebmath_score": null,
"tags": "everyday-life",
"url": null
} |
java, cryptography
private SecretKey DecryptAESKey(byte[] EncryptedAESKey) throws Exception {
AESKeyEncryptor.init(Cipher.DECRYPT_MODE, RSA_KEYS.getPrivate());
return new SecretKeySpec(
AESKeyEncryptor.doFinal(EncryptedAESKey),
"AES"
);
}
// PUBLIC M... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, cryptography",
"url": null
} |
javascript, html, error-handling, ecmascript-6, null
Then when you're on a page where the Things are needed, you just render <Things />. With this approach, the HTML its associated JS handlers are all completely self-contained in the Things. There's no need to use selectors that may have unintentional collisions. (For... | {
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"openwebmath_score": null,
"tags": "javascript, html, error-handling, ecmascript-6, null",
"url": null
} |
-
Ah, so that's what that substitution is called. – Qiaochu Yuan Mar 30 '11 at 18:56
@Qiaochu: You mean, Weierstrass substitution? Yes; my calculus teacher used to call it "Weierstrass magic $t$-substitution method", because it worked like magic no matter what your integral was. – Arturo Magidin Mar 30 '11 at 19:00
C... | {
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"lm_q2_score": 0.8221891305219504,
"openwebmath_perplexity": 328.01934848602536,
"openwebmath_score": 0.9916679263114929,
"ta... |
machine-learning, deep-learning, nlp, word-embeddings, named-entity-recognition
My dataset contains product titles such as the one above with appropriate attribute-value pairs scraped from e-commerce websites.
Which deep learning algorithm is best-suited to solve this problem? Which type of input (embeddings?), neural... | {
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"openwebmath_score": null,
"tags": "machine-learning, deep-learning, nlp, word-embeddings, named-entity-recognitio... |
thermodynamics, ideal-gas, reversibility, adiabatic
to the gas pressure calculated from the ideal gas law times the area of the piston; so, in this case, the work is equal to the gas pressure calculated from the ideal gas law, integrated over the volume change | {
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"tags": "thermodynamics, ideal-gas, reversibility, adiabatic",
"url": null
} |
javascript, beginner, dom
document.getElementById("credit_app-flex_n1").style.display = 'none';
} else {
document.getElementById('credit_app-flex_n1-label').innerHTML = ei_flex_n1_label;
}
if(ei_flex_t1_label === ""){
document.getElementById("credit_app-flex_t1").style.disp... | {
"domain": "codereview.stackexchange",
"id": 41916,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "javascript, beginner, dom",
"url": null
} |
(4). Show that writing $\nabla_v T = \sum_k v^k \nabla_{e^k} T$ where $\nabla_{e^k}T\in\mathcal{T}^p_q$ is given through: $(\nabla_{e^k} T)^{i_1\ldots i_p}_{j_1\ldots j_q} = \nabla_k T^{i_1\ldots i_p}_{j_1\ldots j_q}$, the properties of commuting with contractions and the Leibnitz rule are satisfied in the most general... | {
"domain": "gipad.it",
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9877587265099557,
"lm_q1q2_score": 0.8005576169522185,
"lm_q2_score": 0.8104789109591831,
"openwebmath_perplexity": 2008.5028412290067,
"openwebmath_score": 0.8692194223403931,
"tags": ... |
pineapple number unless the real is. The song sa ugoy ng duyan ; these arguments can be used up. Not equal to 0, so all real numbers a and b are known the... Are talked about if and only if their real parts and imaginary,! Number to be 0, the complex number, but they do not form continuous. Are not discrete integers bu... | {
"domain": "livelovelocks.com",
"id": null,
"lm_label": "1. Yes\n2. Yes",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.980875959894864,
"lm_q1q2_score": 0.8432235117582123,
"lm_q2_score": 0.8596637559030338,
"openwebmath_perplexity": 372.6209636920144,
"openwebmath_score": 0.7746782302856445,
"tags... |
classical-mechanics, waves, doppler-effect, signal-processing
Where is my mistake when applying my approach to periodic signals ?
Is my approach good enough to modelize Doppler effect on any kind of wave ? Can I generalize it even more ?
How can I generalize to introduce Special relativity in my equation (in order to ... | {
"domain": "physics.stackexchange",
"id": 67762,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "classical-mechanics, waves, doppler-effect, signal-processing",
"url": null
} |
quantum-field-theory, renormalization, definition, effective-field-theory
where this follows from a simple change of momentum integration variable from $p$ to $q=e^{-t}p$ in the above formula for the propagator.
This also covers the infinite endpoint case with the conventions $t+\infty=\infty$, $t-\infty=-\infty$ for ... | {
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"tags": "quantum-field-theory, renormalization, definition, effective-field-theory",
"url... |
java
//JPanel
JPanel panel = new JPanel(new GridBagLayout());
//Creating textArea for input
JTextArea inputArea = new JTextArea();
inputArea.setColumns(50);
inputArea.setRows(4);
inputArea.setLineWrap(true);
inputArea.getDocument().putProperty("filterNewlines", Boolean.TRUE); //Make lin... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java",
"url": null
} |
c++, file-system, error-handling
// Input a Word/Query..
inline string getQuery()
{
string query="";
cout<<"\nEnter query.. ";
getline(cin,query,'\n');
return query;
}
// Input the meaning of a word..
inline string getMeaning()
{
string meaning="";
cout<<"\nEnter meani... | {
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"tags": "c++, file-system, error-handling",
"url": null
} |
Where im having the most trouble is the row-reducing part. i was able to the x variables put in a way so that there was only 1 leading 1 in the column. however, im struggling ith the y and z. as well having the variable k there it is confusing me. please help if you can.
$\begin{bmatrix}2 & 0 & 4 & -2\\-1 & 2 & -3 & 4 ... | {
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"lm_q2_score": 0.8244619306896955,
"openwebmath_perplexity": 386.188653986619,
"openwebmath_score": 0.8381856083869934,
"tags... |
ros
boost::shared_ptr<const message_filters::NullType>&, const boost::shared_ptr<const message_filters::NullType>&, const boost::shared_ptr<const message_filters::NullType>&, const boost::shared_ptr<const message_filters::NullType>&, const boost::shared_ptr<const message_filters::NullType>&>; A1 = boost::arg<1>; A2 = ... | {
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} |
• @Enzo Ah, I see, no problem. :-) – Mr.Wizard Jul 26 '17 at 13:08
• Normalize[list, Norm[#, ∞] &] ought to work as well. – J. M. will be back soon Jul 26 '17 at 13:16 | {
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"lm_q2_score": 0.8519528000888387,
"openwebmath_perplexity": 1897.810233956311,
"openwebmath_score": 0.605457603931427,
"tags... |
java, stack, queue
public void push(int data){
if(q1.isEmpty()){
q2.add(data);
}
else{
q1.add(data);
}
}
public int pop(){
int x;
if(q1.isEmpty()){
if(q2.isEmpty()){
System.out.println("Sta... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, stack, queue",
"url": null
} |
c#, .net, linq, entity-framework, wcf
cashonly = c.cashonly,
sex = c.sex,
ssn = c.ssn,
state = c.state,
street = c.street,
zipcode = c.zipcode
}).SingleOrDefault(); | {
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"tags": "c#, .net, linq, entity-framework, wcf",
"url": null
} |
quantum-mechanics, homework-and-exercises, lagrangian-formalism, quantum-optics
\end{split}
\nonumber
\end{equation}
\begin{equation}
\text{-----------------------------------------------------------}
\tag{30}
\end{equation}
identical to that given in the paper, equation (10).
Equations (31) are the equations of mot... | {
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"tags": "quantum-mechanics, homework-and-exercises, lagrangian-formalism, quantum-optics",
... |
homework-and-exercises, electromagnetism
where $\Phi = \mathbf{B}\cdot \mathbf{A}$, since we started off with $B$ constant then, $$\frac{d\Phi}{dt} \propto \frac{dA}{dt} $$
In the case of the rectangular loop, the amount by which the surface changes as the loop moves out, is constant, so: $$\frac{dA_{\rm rect}}{dt} = ... | {
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"openwebmath_score": null,
"tags": "homework-and-exercises, electromagnetism",
"url": null
} |
python, performance, algorithm, python-2.x, statistics
def make_list(line):
words = []
for x in line:
words = words + cleanup(x)
return words
def count_words(words):
word_count = []
counter = 0
for x in words:
for sublist in word_count:
if x == sublist[0]:
... | {
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"openwebmath_score": null,
"tags": "python, performance, algorithm, python-2.x, statistics",
"url": null
} |
deep-learning, generative-models
Title: Why Generator error increases after some epoch I'm training Realtivistic GAN on dog images. I don't understand why my generator loss increased after 100 epoch.
This is the generator loss graph. In your question, it's pretty hard to answer specifically what is going on as you don... | {
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"openwebmath_score": null,
"tags": "deep-learning, generative-models",
"url": null
} |
string-theory, geodesics
where $F(\sigma, \sigma')$ is a function of $\sigma, \sigma'$ which does not depend on $w$, so we don't care by looking at variations of $\Delta$ relatively to $w$. Choosing a inertial frame means that we don't care about the quadratic quantities $Q$ too.
We have an other problem, because here... | {
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"openwebmath_score": null,
"tags": "string-theory, geodesics",
"url": null
} |
c#, beginner, console
Console.WriteLine(
@"*****+-: Main Menu :-+*****
___________________________
Please make a selection
");
foreach (var item in items)
{
Console.Write(item == selectedItem ? "* " : " ");
Console.WriteLine(item.Name);
}
}
} | {
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"openwebmath_score": null,
"tags": "c#, beginner, console",
"url": null
} |
Lemma 1 (Bessel inequality) Let ${g_1,\dots,g_J: {\bf N} \rightarrow {\bf C}}$ be finitely supported functions obeying the orthonormality relationship
$\displaystyle \sum_n g_j(n) \overline{g_{j'}(n)} = 1_{j=j'}$
for all ${1 \leq j,j' \leq J}$. Then for any function ${f: {\bf N} \rightarrow {\bf C}}$, we have
$\disp... | {
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"lm_q2_score": 0.8152324848629214,
"openwebmath_perplexity": 4622.61496713103,
"openwebmath_score": 1.0000090599060059,
"tags": n... |
• Thank you a lot. I've studied your solution, but I have one question. Why exactly can we assume that there exists $b \neq 0$ such that $f(b)=0$? Dec 10, 2013 at 20:04
• Ok, I see. Thank you. Dec 10, 2013 at 20:17
• @Hagrid : After I posted, I thought of a gap in my proof, and it appears you might have spotted it too.... | {
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"lm_q1q2_score": 0.8089998833022297,
"lm_q2_score": 0.8289388019824946,
"openwebmath_perplexity": 117.00158260453608,
"openwebmath_score": 0.9231520891189575,
"ta... |
and engineering as well as economics, social science, biology, business, health care, etc. You can also solve standard problems such as diffusion, electrostatics, and magnetostatics, as well as custom PDEs. 1-D Heat diffusion in a rod. Get MATLAB; Search File Exchange. Posted on July 26, 2017 - News QuickerSim CFD Tool... | {
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"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9873750525759486,
"lm_q1q2_score": 0.8249356033961638,
"lm_q2_score": 0.8354835391516133,
"openwebmath_perplexity": 929.5599831264353,
"openwebmath_score": 0.6053187251091003,
... |
cosmology, photons, big-bang, cosmic-microwave-background
Having suddenly nothing to interact with, those photons just starting travelling in straight lines. Some of those photons were just the right distance from us and were pointed in just the right direction that they are hitting us just now. In fact, they are hi... | {
"domain": "physics.stackexchange",
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "cosmology, photons, big-bang, cosmic-microwave-background",
"url": null
} |
c++, c++11, reinventing-the-wheel
There is no reason to write your own reverse-iterators.
Just use std::reverse_iterator.
There's also no reason to have a separate const_iterator-template once you use SCARY iterators: Just use a normal iterator with a constant value-type.
If you want to enable assignment from non-con... | {
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"id": 17183,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c++, c++11, reinventing-the-wheel",
"url": null
} |
reinforcement-learning, deep-rl, agi, alphazero
Self-play, and more generally sandbox training, is effective. This indicates that given the right enviroment and enough computational power we can build highly effective agents.
Human input is not required, the learnings comes purely from the rules of the game.
A bit w... | {
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"openwebmath_score": null,
"tags": "reinforcement-learning, deep-rl, agi, alphazero",
"url": null
} |
I just wanted to know if my answers are correct? I checked with derivative calculators and they have given me very different answers for b. Thanks in advance.
2. Originally Posted by Pupil
A radioactive substance has a half-life of 20 days.
a) How much time is required so that only $\frac{1}{32}$ of the original amou... | {
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"lm_q2_score": 0.8774767890838836,
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"openwebmath_score": 0.896321713924408,
"tag... |
python, algorithm
>>> partition_dict(2, {"a":1, "b":2, "c":3, "d":3, "e":5, "f":9, "g":9})
[['f', 'e', 'b'], ['g', 'c', 'd', 'a']]
>>> partition_dict(3, {"a":1, "b":2, "c":3, "d":3, "e":5, "f":9, "g":9})
[['f', 'b'], ['g', 'a'], ['e', 'c', 'd']]
"""
bins = [[] for i in range(num_of_bins)]
sums ... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, algorithm",
"url": null
} |
virology, prion
Title: Could a virus produce prions, leading to prion disease? Viruses can make cells produce proteins that are not a part of the new viruses themselves, but are used to help with replication. However in the case of rotavirus, one of these proteins (NSP4) is actually a toxin that causes diarrhoea. Prio... | {
"domain": "biology.stackexchange",
"id": 10401,
"lm_label": null,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "virology, prion",
"url": null
} |
differential-geometry, reference-frames, vectors, coordinate-systems
$\boldsymbol{\nabla}f=\boldsymbol{e}_r\partial_r f + \boldsymbol{e}_\theta\partial_\theta f+ \boldsymbol{e}_\phi\partial_\phi f$,
but equivalently
$\boldsymbol{\nabla}f=\mathbf{\hat{x}}\partial_x f + \mathbf{\hat{y}}\partial_y f + \mathbf{\hat{z}}\... | {
"domain": "physics.stackexchange",
"id": 64879,
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"openwebmath_score": null,
"tags": "differential-geometry, reference-frames, vectors, coordinate-systems",
"url": nu... |
### converse of alternate exterior angles theorem | {
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... |
Outdoor Car Decals, Bose Revolve Soundlink Driver, Orrington Farms Broth Base Gravy Recipe, Vernal Utah Weather, Japanese 3rd Division, Winston Fly Rods, Shiva The Superhero 2, Jason Fu Instagram, Jem And The Holograms Misfits, Skyrim Se College Of Winterhold Mod, Hymn Of Praise Crossword, | {
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"id": null,
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9879462211935646,
"lm_q1q2_score": 0.8337229737737961,
"lm_q2_score": 0.8438950986284991,
"openwebmath_perplexity": 1188.6060532964573,
"openwebmath_score": 0.40798261761665344,
"tags": nul... |
time-series, forecasting
You may find that the following (non-ARIMA) model
adequately captures the dynamics of interest.
#! /usr/bin/env python
from pathlib import Path
from pandas.tseries.holiday import USFederalHolidayCalendar
from sklearn.ensemble import GradientBoostingRegressor
from sklearn.model_selection impo... | {
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"openwebmath_score": null,
"tags": "time-series, forecasting",
"url": null
} |
ros
Title: Real time digital signal processing (dsp) library
Hey everyone,
I'm looking to implement some real-time digital signal processing noise reduction techniques for audio and acceleration signals. Does anyone know if there are any DSP libraries with ROS wrappers already? If not does anyone have experience wi... | {
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mathematics, textbook-and-exercises, nielsen-and-chuang, linear-algebra, kraus-representation
$$
Now we want to take the partial trace over the second subsystem. This means calculating
$$
\sum_k(\mathbb{I}\otimes\langle k|)\rho_{\text{final}}(\mathbb{I}\otimes|k\rangle)=\sum_k\sum_{x,y\in\{0,1\}}\langle x|\rho|y\rangl... | {
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"tags": "mathematics, textbook-and-exercises, nielsen-and-chuang, linear-algebra, k... |
noise, phase
To explain MTIE, I will first explain Time Error (TE) and then Time Interval Error (TIE) and from that finally Maximum Time Interval Error (MTIE):
For a given clock of frequency $\nu$:
Time Error (TE) is the error in time at any instant (measured at time $t$) between the clock and a "perfect" reference cl... | {
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"id": 12115,
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"openwebmath_score": null,
"tags": "noise, phase",
"url": null
} |
botany, plant-physiology
The (very simplified) chemical equation for those two processes are
Introductory sources of information
Here is a video by Veritasium that answers your specific question
Here are a series of videos of Khan Academy to increase your knowledge about photosynthesis | {
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"tags": "botany, plant-physiology",
"url": null
} |
python
For each of the winning statements, the only line which changes is the winning line, and even the lose statement computes the total spent and calls playagain (N.B. Really, we don't actually want this function calling playagain, that results in nested recursion, the top level should call it, but that's another i... | {
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "python",
"url": null
} |
c++, game
/****************************************************/
/**< main menu of game */
void menu()
{
start:
int L=0,y=7;
running=true;
system("CLS");
gotoxy(30,5);
cout<<"/****SNAKE****/";
gotoxy(30,7);
cout<<"*Start Game";
gotoxy(30,9);
cout<<"*Difficulty";
gotoxy(30,11... | {
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"tags": "c++, game",
"url": null
} |
moveit
[ 60%] Building CXX object moveit_ros/planning/trajectory_execution_manager/CMakeFiles/test_controller_manager.dir/test/test_app.cpp.o
Linking CXX shared library /home/karthik/groovy_workspace/moveit/devel/lib/libtest_controller_manager_plugin.so
/home/karthik/groovy_workspace/moveit/src/moveit_ros/planning/pla... | {
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"id": 14035,
"lm_label": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "moveit",
"url": null
} |
neural-networks, reinforcement-learning, continuous-action-spaces, continuous-state-spaces, discretization
More specifically, I would like to use neural networks for learning the Q-function in Reinforcement Learning. My problem has basically a continuous state and action space, and I would like to know whether I have ... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "neural-networks, reinforcement-learning, continuous-action-spaces, continuous-state-spac... |
java, algorithm, backtracking
Title: Given 2 numbers a and b find the smallest number greater than b by interchanging the digits of a and if not possible print -1 I have made the solution for this question it is based on backtracking. Can anyone suggest me how to make it work faster, I haven't practiced backtracking t... | {
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "java, algorithm, backtracking",
"url": null
} |
voltage, semiconductor-physics, electronics, electrical-engineering
Title: Voltage across the diode? Why the voltage across an ideal pn junction diode remains 0.7 volts, even when the applied voltage exceeds 0.7 volts? Shouldn't it be the applied voltage minus the 0.7 V? By definition, the voltage across an ideal junc... | {
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"tags": "voltage, semiconductor-physics, electronics, electrical-engineering",
"url": nul... |
statistical-mechanics, photons, thermal-radiation, bosons
which shows that energy distribution for $\epsilon_n=(n+\frac{1}{2})h\nu$ results in ultraviolet catastrophe!
Does this mean that there are no oscillating charges on the wall of the cavity supposed to be quantum harmonic oscillators?
At Equilibrium, the Freque... | {
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"tags": "statistical-mechanics, photons, thermal-radiation, bosons",
"url": null
} |
quantum-mechanics, photons, momentum, wave-particle-duality, wavelength
I know that my answer does not get to a fundamental explanation of this relation in question, but I hope it shows why one would want it to be a fundamental idea that holds true when formulating QM. If you want a more fundamental explanation, then ... | {
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"tags": "quantum-mechanics, photons, momentum, wave-particle-duality, wavelength",
"url":... |
c++, beginner, algorithm, recursion, combinatorics
These two lines are std::strlen(). They really should be separated out into its own function. One function; one job. Right now gen() not only generates the next word, it also checks the length of the word - that's at least two jobs. Checking the word length is somethi... | {
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"tags": "c++, beginner, algorithm, recursion, combinatorics",
"url": null
} |
c++, object-oriented, neural-network
/// Reduce learnRate_ if -reduceLearnRate is used
if(iCountEpoch_ % learnReductionCycle_ == 0 && iCountEpoch_ != 0)
{
reduceLearnRate(learnReductionFactor_);
}
int numOfCyclesPerEpoch = numOfCol / learnSetSize_; // Compute amount of cycles making up one epo... | {
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"tags": "c++, object-oriented, neural-network",
"url": null
} |
electric-circuits, experimental-physics, capacitance, computational-physics
By utilising the LINREGR command on Google Spreadsheet I was able to determine the slope and the intercept point of the linear trend of the measurements, but how do I go forward from here? I can calculate the reactance at singular points with ... | {
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"openwebmath_score": null,
"tags": "electric-circuits, experimental-physics, capacitance, computational-physics",
"u... |
java, performance, multithreading
Title: Decrease CPU usage in while loop I've a application which runs with two threads. The main thread runs in one infinity-while-loop:
while (true) {
try {
ArrayList<Info> infoList = zabbixHandler.APIRequest();
handleInfo.handleInformation(infoList);
Thread.sle... | {
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"tags": "java, performance, multithreading",
"url": null
} |
quantum-mechanics, condensed-matter, research-level, definition, hamiltonian
So all the physical systems (or all the Hamiltonian) are gapped.
Certainly, the above is not what we mean by "gapped Hamiltonian" in physics.
But what does it mean for a Hamiltonian to be gapped?
Since a gapped system may have gapless excitat... | {
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"tags": "quantum-mechanics, condensed-matter, research-level, definition, hamiltonian",
"u... |
gazebo
Originally posted by chapulina with karma: 7504 on 2017-12-14
This answer was ACCEPTED on the original site
Post score: 1
Original comments
Comment by Fiddle on 2017-12-15:
Setting prismatic joint with the world did work, although when I added the dummy link, the behavior returned, but then I've set the inerti... | {
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"tags": "gazebo",
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} |
molecular-orbital-theory
(e) Yeah, that was a pretty good guess into the wild, that would always be correct ;)
To use the molecular orbital diagram as a reasoning, though: Consider the state before bonding. The four carbon orbitals have four electrons between them (2 in 2s, 2 degenerated in 2p). The six lithium orbita... | {
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} |
java, optimization, serialization
Note that both ByteBuffer and DataOutputStream by default set the format to be Big-Endian, which is also called 'portable', or 'network byte' order. There is no need to re-set it.
Now, the guts of your method is:
byteBuffer.order(ByteOrder.BIG_ENDIAN); | {
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this matrix type. The Portfolio Optimization Machine framework prompts questions about how well academic theories about the relationships between risk and return explain what we observe in real life. variance-covariance) matrix, on the other hand, contains all of this information, and is very useful for portfolio optim... | {
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"openwebmath_score": 0.26045969128608704,
"t... |
nuclear-physics, atomic-physics
One observation can disprove a theory, by contradicting one of its predictions, but a single observation can't prove a theory in general. Rutherford et al. were not doing the experiment in order to see if they could support or disprove the plum pudding model. They were assuming that the... | {
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"tags": "nuclear-physics, atomic-physics",
"url": null
} |
of rows and columns are interchanged value... The conceptual meaning of trace is not close to zero, a is denoted by |A| det! Kronecker delta notation: = the conceptual meaning of trace is not an accurate measure of singularity to... Analogue of the form abs ( det ( P ) = 0 is _____ then value of remains!, det ( a ) or ... | {
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"lm_q1_score": 0.9591542864252022,
"lm_q1q2_score": 0.8152534964698314,
"lm_q2_score": 0.8499711756575749,
"openwebmath_perplexity": 547.6180275580873,
"openwebmath_score": 0.8101840019226074,
"tags... |
c, console
free(lv->rows);
lv->rows = new_rows;
lv->rows_count--;
update_max_col_width(lv, lv->rows_count);
return 0;
}
int listview_insert_row(listview *lv, int row_index, ...) {
if (row_index > lv->rows_count)
return -1;
va_list argp;
va_start(argp, row_index);
lv->rows = ... | {
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} |
python, neural-network, tensorflow, convolutional-neural-network
# MaxPool
pool1 = tf.layers.max_pooling2d(inputs=conv1, pool_size=[3, 3], strides=2)
# Conv + ReLU
...
So let's say this is first neural network, then should I create another neural network for TextMaps and concatenate results? Or does every magi... | {
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"tags": "python, neural-network, tensorflow, convolutional-neural-network",
"url": nul... |
general-relativity, black-holes, angular-momentum, mass-energy
I think it has to do with its increase in rotational kinetic energy contributing to a further increase in its mass, but I'm not sure about this. A spinning black hole does not necessarily have a stronger gravitational pull than a non-rotating one of the sa... | {
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"tags": "general-relativity, black-holes, angular-momentum, mass-energy",
"url": null
} |
cell-biology, cellular-respiration, mitochondria
(source: cnx.org)
What we see here is that ETC is actually made up of a series of complexes (I, II, III, and IV) and a couple of "electron/reaction" carriers (ubiquinone and cyt c). These complexes and carriers are in charge of moving an electron via a series of redox r... | {
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"tags": "cell-biology, cellular-respiration, mitochondria",
"url": null
} |
ros, kinova
I could not find any xacro script for mico2 robotic arm in urdf folder (in kinova_description).
How can I solve this issue?
Thanks,
Abbas
Originally posted by Abbas on ROS Answers with karma: 11 on 2016-11-20
Post score: 0
You have 2 steps to figure out this problem :
First is to go to your Xacro files w... | {
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turing-machines, computability, computation-models, real-numbers, hypercomputation
Notice that a type-1 computable functional only accepts computable inputs, whereas a type-2 computable functional accepts all inputs. If we write $\mathcal{R}$ for the set of all computable sequences of numbers (i.e., the total computab... | {
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... |
• Ah okay I see, is there a way to directly prove that $s_{2n}$ and $s_{2n+1}$ have limits? – Analysis is fun Nov 12 '17 at 1:42
• The subseries argument works fine. Also they are monotonic and bounded above/below so have limits. – Ross Millikan Nov 12 '17 at 1:46
• Ah yes okay I think I've got it now, thanks so much f... | {
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"ta... |
biochemistry, ethology, cell-signaling
And this leads to behavioral changes (at least in animals):
Noradrenaline is involved in many different functions, which all are known to affect behaviour profoundly. ... Part of these effects may arise in indirect ways that are by no means specific to aggressive behaviour, howe... | {
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Let's talk about getting the divergence formula in cylindrical. r 1 (cylinder) b. Based on our results, it can be concluded that when the initial velocity is higher than the critical velocity, the cylindrical cavity expansion model performs better than the spherical cavity expansion model in predicting the penetration ... | {
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"lm_q1_score": 0.9891815519849906,
"lm_q1q2_score": 0.8177680555031247,
"lm_q2_score": 0.8267117940706734,
"openwebmath_perplexity": 603.2376859278611,
"openwebmath_score": 0.8972199559211731,
"tags... |
c++, chess, sfml
The Single Responsibility Principle - A class should only have a single responsibility, that is, only changes to one part of the software's specification should be able to affect the specification of the class.
The Open–closed Principle - states software entities (classes, modules, functions, etc.) sh... | {
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"tags": "c++, chess, sfml",
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Hi could you please explain the part on cross multiplication? I am getting $$a/b$$ > $$b/c$$.
$$(\frac{ad}{bc})^2 < \frac{ad}{bc}$$ --> reduce by ad/bc: $$\frac{ad}{bc} <1$$ --> multiply by bc: $$ad<bc$$.
Hope it's clear.
_________________
Kudos [?]: 123980 [1], given: 12070
Manager
Joined: 04 Jan 2014
Posts: 122
... | {
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"openwebmath_perplexity": 4299.89453809255,
"openwebmath_score": 0.6671302914619446,
"tags"... |
algorithm, programming-challenge, swift, union-find
A second issue (which I learned from your helpful comment) is that you're building a tree allocating each node separately. Considering that these nodes only store a pointer, dynamic allocation is relatively expensive. In my experience, storing tree nodes in an array ... | {
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training, gan, mnist
discriminator_model.add(Conv2D(256, 3, strides=2, padding='same',
kernel_initializer=TruncatedNormal(mean=0.0, stddev=0.02)))
discriminator_model.add(LeakyReLU(alpha=0.2))
discriminator_model.add(BatchNormalization(momentum=0.9))
disc... | {
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"url": null
} |
homework-and-exercises, newtonian-mechanics, oscillators
Thus (for example) for $\theta_0=50~$ degrees the pendulum period is 5% greater than the approximation $~T_L~$. | {
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"url": null
} |
electromagnetic-radiation, visible-light
Consider a tank of water. Low-frequency waves you would make by disturbing the surface don't penetrate the walls of the tank. But higher-frequency waves like sound can be felt/heard through the glass. To me, this is analagous to certain wavelengths of EMR being able to penet... | {
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"tags": "electromagnetic-radiation, visible-light",
"url": null
} |
np-complete, clique
1. Given graph $G=(V,E)$ and integer $k$, can we partition the vertices into two disjoint cliques of size $k$ and $|V|-k$.
2. Given graph $G=(V,E)$ can we partition the vertices into two independent sets of size $k$ and $|V|-k$? The problem is equivalent to deciding whether the complement graph of... | {
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"openwebmath_score": null,
"tags": "np-complete, clique",
"url": null
} |
java, xml, swing, i18n, rubberduck
No presenting without a view:
Whoever expected goodies now, will be sorely disappointed. The Translation Helper is incredibly ugly. Well at least it resizes nicely, has two columns and looks okay enough while doing that. That's enough for me.
To make this as simple as possible for me... | {
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"tags": "java, xml, swing, i18n, rubberduck",
"url": null
} |
forces, torque
As you explained that for the case stated in the question the rod will
translate and rotate, it would be a little bit more helpful for me if
you could explain why does it rotate.
See the diagram below.
For the purpose of determining rotation, the center of mass of the rod can be considered mid point of... | {
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"url": null
} |
Use difference of cubes. $$a^3-b^3 = (a-b)(a^2+ab+b^2)$$
$$\implies (a-b)(a^2+ab+b^2) = 19x^3$$
Set $$\color{purple}{a-b = x}$$.
$$\implies \color{purple}{x}(a^2+ab+b^2) = 19x^3 \implies a^2+ab+b^2 = 19x^2$$
Set $$\color{blue}{b = a-x}$$.
$$\implies a^2+a\color{blue}{(a-x)}+\color{blue}{(a-x)}^2 = 19x^2$$
Move $$... | {
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"openwebmath_score": 0.9818368554115295,
"tags"... |
collections, c++20, circular-list
/**
* @param[in] val Value to add.
* @exception std::length_error Number of values exceed queue capacity.
*/
template<std::copyable T, typename Allocator>
constexpr void gto::cqueue<T, Allocator>::push(T &&val) {
resizeIfRequired(mLength + 1);
size_type index = getUncheckedInde... | {
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"tags": "collections, c++20, circular-list",
"url": null
} |
genetic-algorithms, evolutionary-computing
Of course it can.
Anyway, consider that in GA this already happens implicitly. Using the established methods and genetic operators of genetic algorithms (not only reproduction but also crossover and mutation) the Holland's schema theorem states that low-order schemata with ab... | {
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"tags": "genetic-algorithms, evolutionary-computing",
"url": null
} |
machine-learning, proteomics, features
*, this is why random forests are considered strong
**, there are a lot of different approaches to ML and how they are classifying is very different, some are more prone to overfitting than others. Naive Bayesian and 'linear regression' are the least sensitive to overfitting. | {
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"tags": "machine-learning, proteomics, features",
"url": null
} |
method works best for you. So, in this case, I'll end up with two terms in my answer. Adding and subtracting radical expressions is similar to adding and subtracting like terms. +alegbra printable worksheets on collecting like terms, simplifying square roots with powers solver, grade 10 past papers, base 8, online simu... | {
"domain": "oliorama.com",
"id": null,
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9793540674530016,
"lm_q1q2_score": 0.8244453756084841,
"lm_q2_score": 0.8418256512199033,
"openwebmath_perplexity": 1898.6073078508987,
"openwebmath_score": 0.7300479412078857,
"tags": ... |
quantum-mechanics, perturbation-theory, complex-numbers, hydrogen, parity
Thanks in advance, please help a confined quantum mechanics student!!! You are not doing anything wrong. What you calculated is not the energy but the matrix element of the perturbation. It doesn't have an interpretation as an observable quantit... | {
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"tags": "quantum-mechanics, perturbation-theory, complex-numbers, hydrogen, parity",
"url... |
reinforcement-learning, reference-request, model-based-methods, continuous-state-spaces, discrete-action-spaces
Title: Model-based RL algorithms for continuous state space and finite action space At the beginning, if I have a complete model $p(s' \mid s, a)$ (an assumed true model that describes the environment well e... | {
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"openwebmath_score": null,
"tags": "reinforcement-learning, reference-request, model-based-methods, continuous-state-spaces,... |
javascript, performance, timer
UberTimer.prototype.__workerTick = function() { ... }
UberTimer.prototype.start = function() { ... }
UberTimer.prototype.stop = function() { ... }
Is better as
UberTimer.prototype = {
__makeCall() { ... },
__workerTick() { ... },
start() { ... },
stop() { ... },
}; | {
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"tags": "javascript, performance, timer",
"url": null
} |
soft-question, gt.game-theory
I equally "enjoy" any particular problem available for me to work on (in order to avoid the "soft" (and correct!) answer of "Do what you like!").
I may or may not be successful at finding an answer to any given problem I choose to work on. For any given problem, I have some estimate of th... | {
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"id": 401,
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"openwebmath_score": null,
"tags": "soft-question, gt.game-theory",
"url": null
} |
slam, navigation, 3dmapping, rtabmap, rtab
Here is the launch file part with the parameters I used:
<group ns="$(arg ns)">
<node if="$(arg rgbd_odometry)" pkg="rtabmap_ros" type="rgbd_odometry" name="rgbd_odometry" output="screen">
<param name="frame_id" type="string" value="iris/xtion_sensor/camera_depth_... | {
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"openwebmath_score": null,
"tags": "slam, navigation, 3dmapping, rtabmap, rtab",
"url": null
} |
ros, best-practices, parameter-server, dynamic-reconfigure
Original comments
Comment by weiin on 2012-08-30:
So why not use a dummy value for the parameter before runtime, and then during runtime use setParam? Calling setParam (and getParam) multiple times during runtime can achieve the same effect of dynamic_reconfig... | {
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"url": null
} |
python, graph, concurrency, simulation, statistics
def averager(self):
while True:
term = yield self.average
self.val += term
self.count += 1
self.average = self.val/self.count
class Network(object):
def __init__(self, num_nodes):
self.nodes = [0]*nu... | {
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"openwebmath_score": null,
"tags": "python, graph, concurrency, simulation, statistics",
"url": null
} |
python, game
if triangle.total_peg() == 8:
Language python 2.7
"""
import random
class Slot:
"""
Represents a single slot opening of the triangle game.
This class holds the slot number, it's possible jump
dictionary and helper functions around maintaining slots.
"""
def __init__(self, num, ... | {
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"url": null
} |
So, with four doors, the probability that your original pick was correct is .25 ($1/4$), meaning the probability that you didn't pick the car (and that it's behind one of the three other doors) is .75 ($3/4$). Open a door to reveal a goat, and now, there is that same 75% chance that the car is behind either of the two ... | {
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"lm_q2_score": 0.8311430415844385,
"openwebmath_perplexity": 925.77864249526,
"openwebmath_score": 0.7287960052490234,
"tags":... |
homework-and-exercises, electrostatics
A is the answer BUT WHY explanation needed ! In electrostatics electric fields must be perpendicular to the surface of conductors. Otherwise there would be a component tangential to the surface, which would cause charges to move. The charges would move until they found an equilib... | {
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it would be a maximum. ; Stiff, Lee, ISBN-10: 0618595414, ISBN-13: 978-0-61859-541-9, Publisher: McDougal Littell. Maximum Vertical Distance between 2 functions George Chahrouri How to calculate the Maximum or Minimum vertical distance between Optimization - Max distance between parabola and line. Theoretically, that 1... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9896718474806949,
"lm_q1q2_score": 0.8068126394205651,
"lm_q2_score": 0.8152324848629214,
"openwebmath_perplexity": 355.9055784617001,
"openwebmath_score": 0.530281722545623... |
It is currently 22 Nov 2017, 17:37
### GMAT Club Daily Prep
#### Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
we will pick new questions that match your level based o... | {
"domain": "gmatclub.com",
"id": null,
"lm_label": "1. Yes\n2. Yes\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9553191297273498,
"lm_q1q2_score": 0.8001943763500037,
"lm_q2_score": 0.8376199653600372,
"openwebmath_perplexity": 4532.19802359079,
"openwebmath_score": 0.5444874167442322,
"tags"... |
ros, ros-kinetic
## General remarks
- All length in meters
- Ellipsis (...) signifies that the previous element can be repeated multiple times.
## Standalone tag definitions
### Remarks
- name is optional
### Syntax
standalone_tags:
[
{id: ID, size: SIZE, name: NAME},
...
]
standalone_tags:
[
]
## Tag bundle defi... | {
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"openwebmath_score": null,
"tags": "ros, ros-kinetic",
"url": null
} |
B
[Reveal] Spoiler: My understanding
The option B explicitly states that 12 is a factor of p. So, 2 must have a power of 2 and 3 must have power 1. Now since number of factors is 12, 5 should have power=1.
Thus only feasible solution is p=60.
Please point out the issue in my understanding
You are absolutely correct.... | {
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"openwebmath_score": 0.49131280183792114,
"tags": ... |
c++, ai, visitor-pattern
Note how play() still fits the definition of a visitor. One drawback is that play() is now a template. This can be avoided by passing it a variant of references or pointers as a parameter. To get a pointer to Inputter, you can use a visitor. I also show here how to use std::reference_wrapper:
... | {
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"tags": "c++, ai, visitor-pattern",
"url": null
} |
$$\begin{pmatrix}1 & 0\\ 0 & e^{i\theta} \end{pmatrix} = e^{+i\theta/2}\begin{pmatrix}e^{-i\theta/2} & 0\\ 0 & e^{i\theta/2} \end{pmatrix}$$
If you apply this gate to any state $$|\psi\rangle$$, the only difference in the outcome is a global (constant) phase of $$e^{i\theta/2}$$. This cannot be detected by any measure... | {
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"lm_q1q2_score": 0.8102925596369319,
"lm_q2_score": 0.8539127566694178,
"openwebmath_perplexity": 370.74478924106154,
"openwebmath_score": 0.797081708908081,
"tag... |
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