Questions tagged [python]
A general purpose high-level programming language that emphasizes ease of code syntax and readability.
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Coupled Partial Differential Equations
I'm trying to solve the following system of coupled differential equations, the two-temperature model for $e$ = electrons and $l$ = lattice.
$$
\rho_{e}C_{p,e}\frac{\partial T_{e}}{\partial t} = k_{e}\...
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optimize this python code that involves matrix inversion
So I have this line of code that involves a matrix inversion
X = A @ B @ np.linalg.pinv(S)
$A$ is an $n$ by $n$ matrix, $B$ is an $n$ by $m$ matrix and $S$ is an $...
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Guidelines for image detection model for statis sample
I have 20,000 plus images of art (paintings, sculptures, jars, etc). My goal is creating a computer vision model that, from an input (image), identifies the exact same piece of art and returns its id, ...
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How can I efficiently find an anti-symmetric generator of a special orthogonal matrix?
Given a special orthogonal matrix $O$ (i.e: $OO^T = 1$ and $\det(O) = 1$), I am trying to efficiently find a matrix $X$ such that $O = e^X$ and $X = -X^T$ using Python (NumPy & SciPy).
One obvious ...
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What is the most accurate way of computing the evaluation time of a neural network model?
I am training some neural networks in pytorch to use as an embedded surrogate model. Since I am testing various architectures, I want to compare the accuracy of each one, but I am also interested in ...
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Coding a performant flexible scientific code with Python
I aim to code a PDE flexible fast PDE solver. I read and noticed multiple approaches:
Python + Numba
Python + Cython
Python + some compiled language (c++/fortran)
The equations to be solved are ...
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Help needed in generating a list of radii
I am trying to generate a list of radii between two given points (0 and 1 in this example). Below is my code in Python to generate the list.
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Why is Magnetic Susceptibility not showing the expected transition in 2D&3D Ising Model?
I'm trying to code the Ising Model with the metropolis algorithm to study the ferromagnetic-paramagnetic transitions. The code seems to work ; the equilibration happens. While equilibrating, the ...
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How to constraint the tangential gradient on a boundary in FEniCS?
The problem I'm considering is a 2D scalar PDE.
The domain $\Omega$ is a disk with two holes $\partial\Omega_1$ and $\partial\Omega_2$ and an external boundary $\partial\Omega_0$.
The PDE and boundary ...
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Numerically solving the Advection-diffusion equation with no-flux boundary condition leads to violation of mass conservation
I am trying to solve numerically the advection-diffusion equation of the following form
$$\frac{\partial C}{\partial t}=\alpha\frac{\partial^2 C}{\partial x^2}+\beta \frac{\partial C}{\partial x}$$
...
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Find peaks method for finding elusive peaks
I'm currently utilizing the find_peaks function to identify peaks within this spectrum. However, despite consulting similar queries on Stack Overflow, my attempts to incorporate features such as ...
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How to calculate the numerical integration and plot the result in python?
I am trying to solve the question below in McQuarrie Physical-Chemistry book.
The first step of the exercise, I solved. However, the second step involves a numerical integration. I can develop a code ...
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Converting an expression into an einsum
I have the following expression that I need to calculate for some matrices:
$$
\sum_{k}c_{t,i,k}\sigma^\prime\left(w_tX_t+b_t\right)_k\left(\sum_\ell w_{t,k,\ell}\tilde{X}_t^{w,\ell}\right)
$$
I could,...
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BSplines from scipy not defined on whole range of the knots
I am looking at the construction of BSplines out of curiosity. I created a small code that uses scipy.interpolate.BSpline to create basic splines. I get the following basic splines for order 0, 1 and ...
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Auto differentiation with JAX in python and ForwardDiff.jl in Julia give matrices with different values but same structure. Are the results right?
Using ForwardDiff in Julia gives me the following values for 2 matrices
I have tried to use JAX to auto differentiate the same function in Python but I am getting
the following results for A and B ...
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