text stringlengths 1 1.11k | source dict |
|---|---|
gazebo
Originally posted by chapulina with karma: 7504 on 2017-10-20
This answer was ACCEPTED on the original site
Post score: 1
Original comments
Comment by Baumboon on 2017-10-24:
Is there a way to rotate all Objects with one command? Or do i need to publish all states and positions of each Object?
Comment by chapu... | {
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parsing, prolog
main :-
load_bib('.db.bib'),
do_command.
:- dynamic([bibentry/3, opt/2, mycolour/2]).
:- initialization(main). Quite nice! A few comments: First of all, consider using SWI-Prolog because it has more extensive libraries that you can use. In particular, consider using SWI's library(pio) to process f... | {
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"tags": "parsing, prolog",
"url": null
} |
c#, beginner, console, pokemon
bformatter.Serialize(stream, pokemonList);
}
}
public static void LoadGame(PlayersCollection PlayersCollection)
{
if (File.Exists(GetPath()))
{
using (Stream stream = File.Open(GetPath(), FileMode.Open))
... | {
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"tags": "c#, beginner, console, pokemon",
"url": null
} |
integer, $w$ will always be $5$. Thus, the probability in this case is $0$. The last case we need to consider is when the number $9$ is chosen from $A$. This happens with probability $\frac{1}{5}$. We list out the repeating units digit for $9$ as we have done for $3$ and $7$: $$9\cdot 9=1$$ $$1\cdot 9=9$$ We see that t... | {
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"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.989510908740062,
"lm_q1q2_score": 0.8245837837265945,
"lm_q2_score": 0.8333246015211008,
"openwebmath_perplexity": 50.78711225759814,
"openwebmath_score": 0.7853907942771912,
... |
electrical-resistance, thermal-conductivity, efficient-energy-use
Title: Is "eco" shower mode actually using less power? At work we have electronic showers in the gym, they have three modes:
* (A snowflake, Which I guess means no heating at all)
| eco (A Bar and eco)
|| (Two Bars... so full power I guess) | {
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... |
Is this right?
• It's worth writing another line to explain how you know $g(-s)<0$. – 5xum Jun 12 '17 at 10:25
• The definition of f' is confusing. Do you mean f':S -> R, p -> f(-p)? – William Elliot Jun 12 '17 at 10:32
• Why bother with f'? Simply define g(x) = f(x) - f(- x) for x in S. – William Elliot Jun 12 '17 at... | {
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"openwebmath_score": 0.8722500205039978,
"tag... |
java, performance, statistics
public void add(BigDecimal num) {
sum = sum.add(num);
window.add(num);
if (window.size() > period) {
sum = sum.subtract(window.remove());
}
}
public BigDecimal getAverage() {
if (window.isEmpty()) return BigDecimal.ZERO;
... | {
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"tags": "java, performance, statistics",
"url": null
} |
electromagnetism, electric-circuits, magnetic-fields
In the second case, the reason cited is the reduction in the area of the eddy current loops and hence a smaller magnetic moment for damping.($\vec \mu=I\vec A$)But again, although the area of each eddy current loop has decreased, but then individual loops in differe... | {
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"openwebmath_score": null,
"tags": "electromagnetism, electric-circuits, magnetic-fields",
"url": null
} |
newtonian-mechanics, classical-mechanics, drag, aerodynamics
Title: Terminal velocity equation for falling skydiver doesn't work for empirically determined values Try as I might, using the terminal velocity equation with empirically-determined $v_{T}$ and $C_{d}$ requires a skydiver to have a very small projected surf... | {
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"tags": "newtonian-mechanics, classical-mechanics, drag, aerodynamics",
"url": null
} |
ros, beginner-tutorials, rospack
Original comments
Comment by Lorenz on 2012-09-24:
Re-opened the question because no answer has been accepted yet. If you see a correct answer, please accept it.
I found out what the real cause of my problems was!
The ROS Fuerte release makes it possible for users not to mess with ROS... | {
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This can be evaluated exactly or approximately at $\theta=\frac{\pi }{6}$ to show $\displaystyle \frac{dy}{dx} = 5\sqrt{3}=\approx 8.660$. Conclusion: As with all technologies, getting the answers you want often boils down to learning what questions to ask and how to phrase them. ## Controlling graphs and a free online... | {
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"lm_q2_score": 0.8615382094310357,
"openwebmath_perplexity": 662.4722118474091,
"openwebmath_score": 0.7494776844978333,
"tags": ... |
vba, excel
Dim overwrittenFormulas As Long
overwrittenFormulas = GetOverwriteCount(proposedTableLocation, xlCellTypeFormulas)
If overwrittenConstants > 0 Or overwrittenFormulas > 0 Then
Dim msg As String
msg = "Creating the table will overwrite information. Are you sure you want to continue? T... | {
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"tags": "vba, excel",
"url": null
} |
general-relativity
Inside the shell the metric is:
$$ ds^2 = -\left(1 - \frac{2GM}{c^2D}\right) c^2dt^2 + \frac{dr^2}{1 - \frac{2GM}{c^2D}} $$
where for simplicity I'll leaving off the angular bit since we dealing only with spherically symmetric systems. At first glance this looks curved, but we can define new time an... | {
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"tags": "general-relativity",
"url": null
} |
Thus we have a relation
$$a=(4+\sqrt{5})(x_1+y_1\sqrt{5})$$ and so $(4+\sqrt{5})| a$ in $\mathbb{Z}[\sqrt{5}]$.
Below I explain how to prove that $\,w = 4+\sqrt5\,$ is prime using a direct proof analogous to the classical proof for integers. This will also reveal the relationship between some of the other answers. Fi... | {
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"openwebmath_score": 0.9058836102485657,
"tag... |
in NumPy by using the mean () function. The county still has 13 deaths. 100 G field: •E Zeeman~10-25 J • E Zeeman/E I ~ 10-25. In fact, since by de nition the Hamiltonian has the dimension of energy, therefore the eigen-values of the Hamiltonian are the energies of the system described by the wave function. However, th... | {
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"lm_q2_score": 0.8289388104343893,
"openwebmath_perplexity": 1101.7371464684404,
"openwebmath_score": 0.6746727824211121,
"tags": null... |
quantum-mechanics, homework-and-exercises, newtonian-gravity, atomic-physics, hydrogen
As @PM2Ring commented, the gravitational correction is absurdly small and is swamped by many other physical effects being neglected here, so this is a fairly pointless (but amusing) calculation. For example, relativistic corrections... | {
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"tags": "quantum-mechanics, homework-and-exercises, newtonian-gravity, atomic-physics, hydr... |
arduino, rosserial
I use Ubuntu 11.04 (Natty), ros-electric from the repos, ros-electric-rosserial from the repos and arduino from the repos. I have also tried rosserial from hg, but the result is the same. I have a Duemilanove 168. I have tried on several computers with the same setup, and on two different arduinos. | {
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"tags": "arduino, rosserial",
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} |
cc.complexity-theory, lo.logic, temporal-logic
Title: Complexity of "discrete-time" SAT I'm interested in the complexity of deciding satisfiability of the following family of formulae:
$\exists j. I[j(0)] \land \forall t. S[j(t),j(t+1)]$
where:
$j:\mathbb{N} \to \{0,1\}^n$ has finite support, that is, there exists so... | {
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This shows that very bad functions can have partial derivatives. This is in contrast with the one variable case: if $f(x)$ has a derivative at $x_0$, then $f$ must be continuous at $x_0$. Not so for several variable case as the example above demonstrates.
The note on the top is about differentiability. We will come ba... | {
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"lm_q2_score": 0.8333245953120233,
"openwebmath_perplexity": 224.10139724124053,
"openwebmath_score": 0.9866853356361389,
"tags": null,
... |
data-cleaning, data-wrangling
Data Cleaning
Data cleaning, also referred to as data cleansing, is the process of finding and correcting inaccurate data from a particular data set or data source. The primary goal is to identify and remove inconsistencies without deleting the necessary data to produce insights. It’s imp... | {
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"tags": "data-cleaning, data-wrangling",
"url": null
} |
quantum-mechanics, quantum-information, quantum-computer, fourier-transform
The difference between Quantum Fourier Transform and classical Fast Fourier transform is in the speed and in the way the data is represented physically. Classically, a dimension $n$ vector is represented using $n$ floating point numbers. On ... | {
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"tags": "quantum-mechanics, quantum-information, quantum-computer, fourier-transform",
"u... |
inorganic-chemistry, aqueous-solution, computational-chemistry, water, solubility
Title: Milliliters of NaBr when changing molarity I was very confused by this problem. I was able to get the molarity, but I wasn’t certain how to go from there:
If $\pu{2.60 g}$ of $\ce{NaBr}$ is dissolved in enough water to make $\pu{1... | {
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"tags": "inorganic-chemistry, aqueous-solution, computational-chemistry, water, solubilit... |
classical-mechanics, friction
Also, this is not really a question but a few thoughts that came to my mind that I wanted to discuss. When you send a bowling ball down the alley, it starts by sliding. The kinetic friction force (predicted by the coefficient of kinetic friction) on the bottom of the ball produces a torqu... | {
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"tags": "classical-mechanics, friction",
"url": null
} |
As I was playing with the different ways to create the parabola and thinking about the interplay between the two distances in the parabola’s definition, I wondered about the potential positions of the distance segments.
1. What is the shortest length of segment CP and where could it be located at that length? What is... | {
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"lm_q1q2_score": 0.848296573183587,
"lm_q2_score": 0.8596637541053281,
"openwebmath_perplexity": 1312.9079984145446,
"openwebmath_score": 0.7208898663520813,
"tags": ... |
special-relativity, inertial-frames, group-theory, conventions, poincare-symmetry
When you have a representation $V_\rho$, then $V_\rho\otimes V_\rho$ defined by the representation map $g\mapsto \rho(g)\otimes \rho(g)$ can be a different representation from $V_\rho \otimes V^\ast_\rho$ where $V^\ast_\rho$ is the dual ... | {
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"id": 93701,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "special-relativity, inertial-frames, group-theory, conventions, poincare-symmetry"... |
earth, relative-motion, coriolis-effect
An airship that is moving from west to east is circumnavigating the Earth's axis faster than the Earth itself. Compare that to a car going around a curve on a banked circuit.
(Early racing cars had very little grip. On a banked circuit the car is steered up the slope, so that th... | {
"domain": "physics.stackexchange",
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"openwebmath_perplexity": null,
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"tags": "earth, relative-motion, coriolis-effect",
"url": null
} |
electricity, electric-circuits, conductors
But I'm not convinced with this analogy neither can I see any mechanism by which the electric field is established across the conductor.
I reflected that the electric field may be established by some induction, i.e. maybe the electrons in the vicinity of the electrodes are dr... | {
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"tags": "electricity, electric-circuits, conductors",
"url": null
} |
c, file, comparative-review, windows
if(hFile != INVALID_HANDLE_VALUE)
{
if((*outsize = GetFileSize(hFile, NULL)) != INVALID_FILE_SIZE)
{
if((*outdata = malloc(*outsize)) != NULL)
{
if(ReadFile(hFile, *outdata, *outsize, &check, NULL) && check == *outsize)
... | {
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"openwebmath_score": null,
"tags": "c, file, comparative-review, windows",
"url": null
} |
its opposite angles are congruent. Below are some special properties. Below a few parallelograms are pictured. The converse of the above properties are also true i.e. 6) Theorem 6.1D states that if a quadrilateral is a parallelogram, then its _____ bisect each other. In a … A Rhombus is a flat shape with 4 equal straig... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9496693702514736,
"lm_q1q2_score": 0.809073475574593,
"lm_q2_score": 0.8519527963298946,
"openwebmath_perplexity": 625.1245713626496,
"openwebmath_score": 0.758575975894928,
"tags": ... |
homework, gene-expression, rna, mrna, microarray
However, it looks like the mean(log(Ref/REF)) is still approximately zero. This is what I would expect: values that deviate a bit from perfectly 0, but having an average around 0 (and this average should approach 0 the more samples you have per the law of large numbers)... | {
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"lm_q2_score": null,
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"tags": "homework, gene-expression, rna, mrna, microarray",
"url": null
} |
What's new
# Difference between probability density function and inverse cumulative distribution function?
#### bpdulog
##### Active Member
What is the difference between probability density function and inverse cumulative distribution function, if any? They both look the same
#### ShaktiRathore | {
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"lm_q2_score": 0.8791467785920306,
"openwebmath_perplexity": 1333.9619822409604,
"openwebmath_score": 0.849563717842102,
"ta... |
c++, linked-list, reinventing-the-wheel, collections, library
This could be simplified to:
TEST(iterate, add_3_elements_able_to_iterate_each)
{
auto mylist = list<int>{}; // setup
// (Assuming you want to use push_front to add each item...)
for (auto n : {1, 2, 3}) // ┬ action being tested
myl... | {
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"openwebmath_score": null,
"tags": "c++, linked-list, reinventing-the-wheel, collections, library",
"url": null
} |
java, yaml
public String getString(String key)
{
return (String) getObject(key);
}
public int getInt(String key)
{
return (int) getObject(key);
}
public double getDouble(String key)
{
return (double) getObject(key);
}
}
Example of usage:
Config.getInt(Config.SERVER_PORT); So far it's looking quite good,... | {
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"openwebmath_score": null,
"tags": "java, yaml",
"url": null
} |
tensorflow
This is based on a 1993 paper (look at my answer here for more information) by J. Shao in which he proves that $n_c \approx n^{3 \over 4}$ is optimal for linear model selection. At that time, non-linear models such as machine learning (see this answer for yet another discussion on that) were not as popular... | {
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"openwebmath_score": null,
"tags": "tensorflow",
"url": null
} |
species-identification, botany
Title: What’s the name of this tree? I’m trying to find information about this tree that I didn’t plant. Looking for information in terms of pruning, etc.
It had white flowers on it this spring, but is now flower less and has very few young berry-esque type fruits growing on it. They’re... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "species-identification, botany",
"url": null
} |
javascript, jquery, html5
Title: Loading div sections from separate files I am loading divs from separate HTML files into a div on the index.html page.
This is being done using jQuery's .load(). There is however, a lot of repetition and I'm wondering if there is a cleaner way to achieve this.
The HTML:
<nav class="men... | {
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"openwebmath_score": null,
"tags": "javascript, jquery, html5",
"url": null
} |
climate-change, data-analysis
or real-time encyclopedia, and making it very flexible and easily consumable. It seems to be something that could be of amazing use, and I suggest folks look into to get an idea of what can be done with technology applied well, it may spark some creativity and reshape views. Knowing what ... | {
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organic-chemistry, experimental-chemistry, bond, molecules
\ce{C_{(5)}-O_{(1)}} & \pu{1.375 \mathring{A}} & \pu{1.399 \mathring{A}} & \pu{1.402 \mathring{A}} \\
\hline
\end{array}
$$
These data demonstrate how bond lengths in oxazole ring deffere by its substitutions and attached ring systems. Even two $\ce{C^\mathrm{... | {
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quantum-mechanics, condensed-matter, gauge-theory, research-level, topological-order
$$\boldsymbol{S}_i=\frac{i}{2}\Big(\chi_i^0\boldsymbol{\chi}_i-\frac{1}{2}\boldsymbol{\chi}_i\times\boldsymbol{\chi}_i\Big),$$
where the vector $\boldsymbol{\chi}_i=(\chi_i^1,\chi_i^2,\chi_i^3)$ is made of the last three components of... | {
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"tags": "quantum-mechanics, condensed-matter, gauge-theory, research-level, topological-ord... |
algorithms, complexity-theory, runtime-analysis
or even
def cover_test(keys, sentence):
sentence_word_set = set(sentence)
return all(i in sentence_word_set for i in keys)
Set construction is promised to be expected linear-time in the size of sentence, with expected constant-time lookups. And the for loop goes... | {
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java, algorithm, game, libgdx
Magic numbers again -- this time appearing as argument names. The names of the arguments kind of match up with the index into the list that they will appear in, but that's not telling us what's really going on. Let's look at how it is being used....
for (int i = 0; i < tilePattern.s... | {
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Note that ${|f(-1)-f(1)|\le 2L(1)}$ and that every value of ${f}$ is within ${2L(1)}$ of either ${f(-1)}$ or ${f(1)}$. Hence, the oscillation of ${f}$ on ${I}$ is at most ${6L(1)}$. If ${L(1) \le \epsilon/3}$, then the constant mid-range approximation on ${I}$ gives the desired conclusion, with ${J=I}$. From now on ${L... | {
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"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9879462187092608,
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"lm_q2_score": 0.8152324848629214,
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"openwebmath_score": 0.9988199472427368,
"tags": ... |
courses. Intermediate value theorem - Wikipedia. Theorem (The Bolzano–Weierstrass Theorem) Every bounded sequence of real numbers has a convergent subsequence i. Proof: We prove the case that f attains its maximum value on [ a, b]. The Riesz Representation Theorem MA 466 Kurt Bryan Let H be a Hilbert space over lR or C... | {
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"lm_q1_score": 0.9869795079712153,
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"openwebmath_score": 0.8232946991920471,... |
# How is $(x+y)^p \equiv x^p + y^p$ mod $p$ for any prime number $p$?
I'm currently studying for an exam and on the practice test given to us (with solutions), there is a problem that states the following:
Notice that for all $$x,y \in \Bbb Z$$,
$$(x+y)^2 = x^2 + 2xy + y^2 \equiv x^2 + y^2$$ mod $$2$$
$$(x+y)^3 = x... | {
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"openwebmath_score": 0.9310492873191833,
... |
ros, occupancy-grid
3- run the roscore
4- rosrun map_server map_server map.yaml
and nothing happens , i checked the published topics using rostopic list and nothing is published, please help
Originally posted by g-emad on ROS Answers with karma: 15 on 2016-03-19
Post score: 0
The map_server package can probably help... | {
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"tags": "ros, occupancy-grid",
"url": null
} |
classical-mechanics
Linear velocity: this is its velocity in the tangential direction and is constantly changing
Angular velocity or angular frequency: this is the rate of change of angle.
Is the above correct? And have I missed anything? No. Frequency is defined as 2π*θ/t where theta is the angle rotated for a time... | {
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# Prove that every group of order $4$ is abelian as follows.
Can you please check my logic and maybe suggest some other strategies for the following problem:
Prove that every group of order $$4$$ is abelian as follows: Let $$G$$ be any group of order $$4$$, i.e., $$|G| = 4$$.
• (1) Suppose there exists $$a \in G$$ s... | {
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"tags... |
### How to Gather a list with some elements considered unique
I have a list of the form: list={{0,...},{1,...},{1,...},{0,...},{3,...},{3,...},{0,...},{0,...},{5,...},{5,...},{5,...},{0,...},{5,...},{0,...},...} So when we ...
185 views
### How to wrap this dynamic code inside a Manipulate?
My goal is to set up a Is... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9252299653388752,
"lm_q1q2_score": 0.8038645649218209,
"lm_q2_score": 0.8688267728417086,
"openwebmath_perplexity": 2127.404607696463,
"openwebmath_score": 0.7307412028312683,
"tag... |
rosdep, docker, raspberrypi
However, the rosdep install commands fails with:
Step 20 : RUN rosdep install --from-paths src --ignore-src --rosdistro $ROS_DISTRO -y
---> Running in 3be8cdf3c72a
sudo: no tty present and no askpass program specified
ERROR: the following rosdeps failed to install
apt: command [sudo -H a... | {
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"tags": "rosdep, docker, raspberrypi",
"url": null
} |
python, graph, tk
t = "road" if c == "red" else "path"
canvas.create_line(v1[0], v1[1], v2[0], v2[1], fill=c, width=1.5, tags=t)
def draw_node(self, v, canvas):
'''Draw a node at v.'''
r = 10
canvas.create_oval(v[0] + r, v[1] + r, v[0] - r, v[1] - r, fill="black")
def draw(se... | {
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"id": 3071,
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"openwebmath_score": null,
"tags": "python, graph, tk",
"url": null
} |
vba, excel
End Sub
Private Function FindMeal(ByVal mealName As String, ByVal targetSheet As Worksheet) As Variant
Dim lastRow As Long
Dim currentRow As Long
Dim mealLastRow As Long
With targetSheet
lastRow = targetSheet.Cells(targetSheet.Rows.count, 2).End(xlUp).Row
For currentRow = 2 ... | {
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"tags": "vba, excel",
"url": null
} |
fft, python, wave, finite-differences
and it is a very complex behavior for useful analysis.
In reality, to be able to analyze a frequency spectrum of the membrane response to external force, you should scan the frequency of external force. You may want to examine a frequency response at all the membrane points, and t... | {
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"tags": "fft, python, wave, finite-differences",
"url": null
} |
# set notation symbols | {
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"openwebmath_perplexity": 1196.6047413664617,
"openwebmath_score": 0.66248250007629... |
python, classification, scikit-learn, random-forest, deployment
Furthermore, better tuning of hyperparameters might improve the model stability (reduce sensitivity to random aspects of the data). For example restricting depth in your RandomForest. | {
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"url": nul... |
situation y terms is... The constants $b_1, b_2, \dots, b_m$ are all zero 's Mile! \Dots, b_m $are all zero second equation to the following systems of equations upgrade to another browser! X and y that will solve both equations )$ a solution a... Solutions are mixed together resulting in a new final solution incredibl... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9603611654370414,
"lm_q1q2_score": 0.8219262031766205,
"lm_q2_score": 0.8558511451289037,
"openwebmath_perplexity": 412.1175494046038,
"openwebmath_score": 0.47787198424339294,
"tags": nul... |
c++, performance, signal-processing
I assume your purpose here is to make the hilbert function faster, because you will call it multiple times. You've moved the FFT plan creation outside of hilbert, which is probably a huge speed increase. However, you still call fftw_destroy_plan within hilbert. This is a problem if ... | {
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} |
ros, eigen3, ros-kinetic
Originally posted by mojakobi on ROS Answers with karma: 3 on 2018-05-12
Post score: 0
I can see where your problem is here.
But one quick point first the #include <Eigen/QR> is working fine, the compiler wouldn't even try to build your code if it couldn't find this include. So that bit's oka... | {
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reference-request, np-hardness
Title: Hamiltonian cycle on graphs without small cycles While answering this question on cstheory, I (informally) proved on the fly the following theorem:
Theorem: For any fixed $l \geq 3$ the Hamiltonian cycle probem remains NP-complete even if restricted to planar bipartite undirected ... | {
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star, distances
You could pay to have copies of the Gaia spacecraft built and sent into orbit around the giant planets in our solar system and/or at their L4 and L5 positions. Thus two or more such observatories could study the same star at the same time with a baseline between them tens of times greater than the bas... | {
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"tags": "star, distances",
"url": null
} |
fluid-dynamics, geometry, rocket-science
The performance of the Delaval nozzle is dependent on the fact that hot exhaust gases have different properties depending on their speed regime, that is subsonic or supersonic. The velocity of a subsonic flow of gas increases where the nozzle constriction occurs, as the mass ... | {
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"tags": "fluid-dynamics, geometry, rocket-science",
"url": null
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cosmology, cosmic-microwave-background
Title: Value of density parameters in CMB time I was looking for the value of the density parameters ($\Omega_{i}$) in cosmology at the time of decoupling (CMB Time).
I know that the Planck Colaboration aproximatelly gives $\Omega_{m}=0.315$, $\Omega_{\Lambda}=1-\Omega_{m}$. Bu... | {
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"tags": "cosmology, cosmic-microwave-background",
"url": null
} |
javascript, observer-pattern
</div>
<div class="post">
<h2>Title 3</h2>
<p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Neque dolorum consequatur nostrum sapiente ipsa! Veniam, laudantium accusantium, odio maxime quo adipisci possimus enim quam, voluptate quidem animi perferendis delectus aliqua... | {
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"tags": "javascript, observer-pattern",
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For single value evaluation, i.e. questions like "is it normal to have 0.15 ?" etc; we employ a very similar technique:
$$\sigma=\sqrt{\frac{p_{true}(1-p_{true})}{n}}, z_{cal}=\frac{p_{true}-p_{observed}}{\sigma}$$, And similarly compare this calculated $$z$$ value with $$\alpha$$ significance level thresholds. For ex... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9759464464059648,
"lm_q1q2_score": 0.8111510999303676,
"lm_q2_score": 0.8311430436757313,
"openwebmath_perplexity": 730.6193095413221,
"openwebmath_score": 0.6212498545646667,
"tag... |
php, object-oriented
$htmlFiles = '';
foreach($_SESSION['filesData'] as $file) {
$htmlFiles .= '<form action method="post">';
$htmlFiles .= '<p><span style="margin-right:15px;"><input type="submit" name="delete" value="Remove"></span>';
$htmlFiles .= '<a href="?' . 'open=' . $file['id'] . '">' . $file['na... | {
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"tags": "php, object-oriented",
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theorem ppt for FREE. Sampling Rate Reduction By an Integer FactorM=2N < : no aliasing. The potential defectors are all the frequency components beyond f s /2 Hz. What are the types of probability sampling? Simple random sampling, as the name suggests, is an entirely random method of selecting the. Sampling Theorem: Le... | {
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"lm_q1_score": 0.9777138190064204,
"lm_q1q2_score": 0.8386517244194076,
"lm_q2_score": 0.8577680995361899,
"openwebmath_perplexity": 1872.0321743146578,
"openwebmath_score": 0.537798464298248... |
electrostatics, potential, voltage, conventions, integration
I don't understand why he states that $\Phi$ is arbitrary to a constant. Sure, the integral appears to be written as an indefinite integral, but the fact that it is an integration over all space indicates it is actually an improper integral with three-dimens... | {
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"tags": "electrostatics, potential, voltage, conventions, integration",
"url": null
} |
2. Step Two: For each $0 \leq i \leq r$, set \begin{equation*}\sigma_i = \sqrt{\lambda_i} .\end{equation*} These are the “Singular Values” named in the singular value decomposition.
3. Step Three: for each $0 \leq i \leq r$, set \begin{equation*} u_i = \dfrac{1}{\sigma_i} Av_i. \end{equation*} By the way things are se... | {
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"lm_q2_score": 0.8198933381139646,
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"openwebmath_score": 0.9963504076004028,
"tags": nul... |
javascript, performance, ecmascript-6, quiz
Or use a loop:
var foo = "ABC".split("").map(getVal);
Simplify
Your code gets a set of answers, a few for each category, scores them and calculates a mean; it then uses that mean to get the message. That is a very simple process and should be done one at a time for each cat... | {
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python, performance, algorithm, python-3.x, combinatorics
if not base_length:
yield ()
return
for base in stable_triangle_bases(base_length - 1, upper_bound, full_length):
x_factor, min_const_cost = heuristic_minimum(base, full_length)
for i in count(1):
cost = i * x_f... | {
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php, object-oriented, mvc, url-routing
public static function beforeViewing(){
}
}
These are some important files, but if you want me to show some more files, let me know.
Anything that could help / guide me to improve the code would help me a lot. I'm still rather new to this whole code separation trough OOP / ... | {
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gazebo
Screenshot 2
Here are the files of my model
model.config
<?xml version="1.0"?>
<model>
<name>unit_box_1</name>
<version>1.0</version>
<sdf version="1.5">model.sdf</sdf>
<author>
<name>Louis M</name>
<email></email>
</author>
<description>
A Rock.
</description>
</model> | {
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machine-learning, svm
Title: Can 2 dimensional input be applied to SVM? When considering Support Vector Machine, in an take in multiple inputs. Can each of these inputs be a vector??
What i am trying to say is, can the input be a 2 dimensional vector?? If I understand your question correctly. Yes, SVM can take multipl... | {
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"tags": "machine-learning, svm",
"url": null
} |
c++, c++11, vectors
[[nodiscard]] const T& operator[](u32 id) const
{
assert(id < _array.size());
return _array[id];
}
constexpr operator const std::vector<T>&() const
{
return _array;
}
private:
constexpr void write_index(u32 id, u32 next_free_id)
{
debug_op(memset(&_array[id], 0xcc, sizeof(T)));
... | {
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"openwebmath_score": null,
"tags": "c++, c++11, vectors",
"url": null
} |
ros, callback
I hope that's what you're looking for.
EDIT:
As Kramer suggested in his comment below, only one callback happens at a time. So you don't have to use mutex unless you have multi-threaded node process.
Originally posted by ajain with karma: 281 on 2014-12-10
This answer was ACCEPTED on the original site
P... | {
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"openwebmath_score": null,
"tags": "ros, callback",
"url": null
} |
c++, algorithm, boost, numerical-methods
lexical_cast<Real>("0.999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999988520"), // g(5)
},
{
lexical_cast<Real>("0.674271492248435826080420090632052144267244477154740136576044169121421222924677035505... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c++, algorithm, boost, numerical-methods",
"url": null
} |
technical-drawing
Title: Understanding some drawing notations Question in short
The following drawing is a ball-screw with both ends mechanized and a ball-nut on it.
What is the meaning of the indicated notations?
Context
What is clear to me are:
Indications of sizes/distances
Angles
Parameters of precision/erro... | {
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"openwebmath_score": null,
"tags": "technical-drawing",
"url": null
} |
r, fasta, machine-learning
This is common to many machine learning algorithms: they work very much like black boxes. One exception is decision trees. They will report what features are used to classify the positive vs negative datasets.
However, as with all ML methods, you need to be very careful of your training data... | {
"domain": "bioinformatics.stackexchange",
"id": 153,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "r, fasta, machine-learning",
"url": null
} |
neural-network, deep-learning, classification, graph-neural-network
The node focused task approach makes sense to me; you would essentially compare the ground truth to each output of the "local output function" for each node, and backprop accordingly. However, based on the above description, I do not understand what y... | {
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"openwebmath_score": null,
"tags": "neural-network, deep-learning, classification, graph-neural-network",
"url": ... |
sql, mysql, mysqli
Title: Abusive use of long database query? I somehow acquired the idea that I should reduce the number of trips to the database as much as possible and so I use a lot of very long queries.
For example, I had a function that does this:
$shelf = get_shelves($shop_id)
foreach($shelf)
{
$weight = g... | {
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"id": 7235,
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "sql, mysql, mysqli",
"url": null
} |
fft, fourier-transform, dft, convolution, fourier
bx.plot(
f,
np.real(vs),
color="blue",
ls="",
marker=".",
label=r"$\Re[\operatorname{DFT}]$",
)
bx.plot(
f,
np.imag(vs),
color="red",
ls="",
marker=".",
label=r"$\Im[\operatorname{DFT}]$",
)
if "interpolation" in elements... | {
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"id": 11692,
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"lm_name": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "fft, fourier-transform, dft, convolution, fourier",
"url": null
} |
ros2, ros-humble, callback, rostopic, rclcpp
#include "rclcpp/rclcpp.hpp"
#include "std_msgs/msg/string.hpp"
class MinimalSubscriber : public rclcpp::Node {
public:
MinimalSubscriber()
: Node("minimal_subscriber"),
subscription_1_(this->create_subscription<std_msgs::msg::String>(
"chatter_... | {
"domain": "robotics.stackexchange",
"id": 39049,
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"lm_name": null,
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"openwebmath_score": null,
"tags": "ros2, ros-humble, callback, rostopic, rclcpp",
"url": null
} |
vector. Active 3 years, 3 months ago. Then [T] C;C = 3 4 4 3 and the characteristic. I got [1 1 1 0], which is already in row reduced echelon form. For AX = B, we can say that. (b)Let Lbe a linear transformation, L: R2!R2 de ned by L( b 1 + b 2) = b 1 b 2, 8b 2R2, where b 1 = 2 1 and b 2 = 3 0. or independent. Find the... | {
"domain": "puntoopera.it",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9891815516660637,
"lm_q1q2_score": 0.8155425233563044,
"lm_q2_score": 0.8244619220634456,
"openwebmath_perplexity": 369.9796243537065,
"openwebmath_score": 0.8836857080459595,
"tag... |
python, python-3.x, wordle
# word to our matches2 list
matches2 = []
for word in matches:
flag = True
for letter in in_word:
if letter not in word:
flag = False
if flag:
matches2.append(word)
# iterate through every word in our matches2 list and then iterate through
# every lett... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, python-3.x, wordle",
"url": null
} |
condensed-matter, experimental-physics, solid-state-physics, quantum-computer, quantum-hall-effect
Title: Why is a large magnetic field problematic (for topological physics)? In papers studying or searching for topological order (intrinsic or symmetry-protected) in various condensed matter systems (e.g. Field-tuned an... | {
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"id": 95827,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "condensed-matter, experimental-physics, solid-state-physics, quantum-computer, qua... |
c, console, to-do-list, markdown
/* Set sb->length to new_len if sb->capacity greater than new_len.
*/
void string_buffer_set_length(StringBuffer *sb, size_t new_len);
/* Clear content of sb->string making it an empty string.
*/
void string_buffer_clear(StringBuffer *sb);
/* Frees sb->string and calls string_buffe... | {
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c, console, to-do-list, markdown",
"url": null
} |
c++, array, matrix, iterator, c++20
both of these lines instantiate the same copy of the std::sort() function. That’s fewer templates for the compiler to instantiate, and fewer functions ending up in your binary.
SCARY iterators are iterators that don’t depend on anything but the container’s value_type. (That’s a simp... | {
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"id": 42493,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c++, array, matrix, iterator, c++20",
"url": null
} |
states-of-matter
Title: Doubt about states of matter What does exactly means "Small molecules may appear as solid, liquid, and gaseous phases without losing their molecular integrity"?,
I can't image how just a molecule can be a gas, liquid or solid. Or in fact the previous phrase refers to the state of aggregations ... | {
"domain": "physics.stackexchange",
"id": 13347,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "states-of-matter",
"url": null
} |
orbit, comets, meteor
Why are we going through the meteors left behind by the orbits from 1466 and 1533? What happened to the orbit of 1500 and every subsequent orbit?
My guess is that the perihelion moves slightly from orbit to orbit so the earth moves through a different one each time but I'd love to get an expert e... | {
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"id": 726,
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "orbit, comets, meteor",
"url": null
} |
random, simulation, kotlin
// Default constructor
private var age = 0
private var genome: Genome = Genome()
private var pregnant: Boolean = false
constructor(mum_genes: Genome): this(){
age = 0
genome = mum_genes
pregnant = false
}
fun isPregnant(): Boolean { return pr... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "random, simulation, kotlin",
"url": null
} |
star, exoplanet, stellar-astrophysics, age
Title: Stellar age determination - code I'm trying to determine the age of some stars. I have many parameters that characterize these stars: $T_{eff}$ ,log ${g}$ ,$[Fe/H]$, $V$... I've tried to use the isochrones package but so far no success. I was wondering if any of you mi... | {
"domain": "astronomy.stackexchange",
"id": 4514,
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"lm_name": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "star, exoplanet, stellar-astrophysics, age",
"url": null
} |
\begin{eqnarray*} \left\lfloor x \right\rfloor &\ge& \frac{S}{n-m-1} \\ &=& \left\lceil \frac{S}{n-m-1}\right\rceil \end{eqnarray*}
Using this, we can solve $l$,
\begin{eqnarray*} l &=& (n-m-1) \left( 1+ \left\lfloor x \right\rfloor\right) -S \end{eqnarray*}
Now observe that,
\begin{eqnarray*} \left\lfloor x+ \frac... | {
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"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.975946442208311,
"lm_q1q2_score": 0.8089998807896827,
"lm_q2_score": 0.8289388083214156,
"openwebmath_perplexity": 2144.5239149507984,
"openwebmath_score": 0.9999833106994629,
"tag... |
formal-languages
there is an increment and a decrement instruction (and no zero-test),
a run is accepting if in the end, all counters are zero, and
during a run, the counters are allowed to be negative. | {
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"tags": "formal-languages",
"url": null
} |
materials, cost-engineering
Title: Better / Cheaper Material Choice? Current State
Currently I have designed a coffee roaster that mostly uses the stainless steel tri clamps / tubes that many brewers use. The system can get up to 450 degrees F (232°C) even with moving air.
Question
I was wondering if someone has come ... | {
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"id": 3494,
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"lm_q1_score": null,
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "materials, cost-engineering",
"url": null
} |
any of the two events A & B. Venn diagrams represent mathematical sets. 6 Mutually-Exclusive Probabilities; 4. Updated Dec. Venn diagram word problems are based on union, intersection, complement and difference of two sets. Week 3: Venn Diagram and Portfolio Preview (We talked about the steps we would take to complete ... | {
"domain": "svc2006.it",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9852713857177955,
"lm_q1q2_score": 0.8334828736177018,
"lm_q2_score": 0.8459424334245617,
"openwebmath_perplexity": 1918.1852568927695,
"openwebmath_score": 0.4274599254131317,
"tags"... |
c, beginner
}
return argv;
}
/**** THE MAIN CALLER ****/
/* the main function */
char **ordering (int *argc, char **argv, char *optstring) {
argv = malloc_and_divide (argc, argv);
argv = organize (*argc, argv, optstring);
return argv;
} Rather than continue in the comments, I talk here. This isn'... | {
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "c, beginner",
"url": null
} |
scattering
As the two unit orthogonal eigenvectors verify $\underline u_1\underline u_1^{*T}+\underline u_2 \underline u_2^{*T}=I_{D2}$, it
follows the Chandrasekhar decomposition of the wave given by
$$J=(\lambda_1-\lambda_2)\underline u_1\underline u_1^{*T}+\lambda_2I_{D2}=J_{CP}+J_{CD}$$ | {
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"id": 24131,
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"openwebmath_score": null,
"tags": "scattering",
"url": null
} |
rosmake
-------------------------------------------------------------------------------}
[ rosmake ] Output from build of package pcl written to:
[ rosmake ] /home/ira/.ros/rosmake/rosmake_output-20120708-151720/pcl/build_output.log
[rosmake-1] Finished <<< pcl [FAIL] [ 0.04 seconds ] ... | {
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"id": 10087,
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"openwebmath_score": null,
"tags": "rosmake",
"url": null
} |
python, numpy, pandas, cython
if file_path.endswith('.gz'):
self.file_path = _unzip(file_path)
else:
self.file_path = file_path
def __enter__(self) -> File:
self.grib_file = File(self.file_path)
return self.grib_file
def __exit__(self, *_) -> None:
self... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, numpy, pandas, cython",
"url": null
} |
ros, catkin-package, catkin, ros-fuerte, build-package
Next step is :
You should be able to build the code with:
$ cd %TOP_DIR_YOUR_CATKIN_WORKSPACE%
$ catkin_make
I don't have any catkin workspace(or I can't find it). So, I tried to create a workspace using this [guide].(http://wiki.ros.org/catkin/Tutorials/create... | {
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"openwebmath_score": null,
"tags": "ros, catkin-package, catkin, ros-fuerte, build-package",
"url": null
} |
gears
Instead the shape is the involute of a circle. Easiest way for you to make it is to tie a pen on a string around a round object and keeping the string tight as you draw the curve. This is the involute for that particular circle. This makes the curve quite simple in cartesian vector form. Its essentially a rotati... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "gears",
"url": null
} |
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