3,602 questions
Tooling
1
vote
1
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73
views
Need Project Ideas That Solve a Real-World Problem?
I’ve been thinking about building a project that actually solves a real problem instead of making another basic CRUD app or clone project.
My interests are mainly in:
Machine Learning
NLP
...
4
votes
1
answer
142
views
Linear regression using scipy.ODR gives 0 error on all parameters
I was trying to use scipy ODR to fit a linear graph as that would take into account both my xerror and yerror for each value. It does infact get me parameters out but I just end up with it saying that ...
- 49
2
votes
4
answers
157
views
Is this floating-point thermistor beta equation robust?
I'll try to be judicious in how much context I include here. I will lead with my primary question and then fill out more context.
Question
Is there a different form of my equation that will be more ...
- 684
0
votes
0
answers
53
views
A problem in indexing hub selection for a many-body state problem and erdos number
I'm working on reproducing figure 8 of “Dynamical decoherence of a qubit coupled to a quantum dot or the SYK black hole,”.
The figure is:
In the paper "hub=0 corresponding to the many-body state ...
- 199
0
votes
1
answer
110
views
Time function for Plasma simulation
I would like some input or suggestions to an aspect of a program I am writing. I am programming a simulation of impurities in a background plasma. The background data is defined on a certain grid and ...
Best practices
0
votes
4
replies
72
views
Numerical estimate of derivative for stochastic process
I am modelling a stochastic process in which the position of a particle is being updated according to the following rule: X[t+1] += V[t] * dt + np.sqrt(2*dt) * np.random.normal(0, 1). My simulation ...
- 103
Best practices
2
votes
1
replies
68
views
Compute 1D motion profile with acceleration, deceleration and mid-course target change
I need an analytic solution for a 1D motion controller. Initial state: x=0, v=0. Parameters: a_acc = 50, a_dec = 30, v_max = 40. Given a target position (e.g. x=20) the object should:
accelerate up ...
1
vote
0
answers
67
views
Ray tracing for the offner stretcher
Please help me refine the ray tracing code of the Stretcher Offner in MATLAB.
I used the formulas from the article to plot graphs from Figure 3, showing the dependence of the group delay on the ...
0
votes
1
answer
76
views
Rotate Pelvis to face the camera UE5.6
I am in the process of making an active ragdoll character in ue5.6. I have gotten the ragdoll walking, grabbing, hanging, jumping, and all sorts of fun stuff. But I am currently stuck on how to make ...
- 1
2
votes
2
answers
150
views
How to fix the erfz function from package pracma properly?
I need to use the function erfz (error function that takes complex arguments) for fitting Voigt profiles. It seems like it is only implemented in R in the pracma package as erfz(z).
I tried to ...
- 23
-2
votes
1
answer
138
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Calculating second focal point of planetary orbit [closed]
With a 2d physics simulation in JavaScript I am trying to determine the second focus of an ellipse. My system's eccentricity is too low. The point moves around too much and isn't where it should be. ...
- 1
0
votes
0
answers
106
views
Trying to graph of the relationship of the frequency and wave number of the spin wave
I've been trying to make this code into a function and gather the wave number, but how do I get the frequency and then collect the data bt changing the wave number and then graphing.
Here is the code ...
2
votes
1
answer
246
views
Physics of cubes in simulation
I want to create a website that can repeat that experiment from Youtube video. And i made it, its working, but it has problem: when input number is entered above 2-3 thousand, the big block, when ...
- 71
3
votes
1
answer
389
views
Integration limits when integrating to infinity using quad and vectorize
I have a rather complicated physics-model (Thomas Hopfield model from https://www.researchgate.net/publication/...
- 33
1
vote
2
answers
113
views
Issues with boundary layers in step propagation
I am trying to create a function which receives the transversal profile of a beam and outputs the transversal profile propagated by some distance. To exemplify the task, here is the profile of a ...
