Community Profile

photo

Jan Valdman


Last seen: 3 Tage vor |  Aktiv seit 2010

Followers: 0   Following: 0

Kontakt

Associate professor of applied mathematics https://sites.google.com/site/janvaldman/ Professional Interests: FEM, nonlinear computational mechanics, a posteriori error estimates, MATLAB vectorizations

Statistiken

All
  • Thankful Level 2
  • Personal Best Downloads Level 3
  • First Review
  • 5-Star Galaxy Level 4
  • GitHub Submissions Level 1
  • First Submission
  • Thankful Level 1
  • Solver

Abzeichen anzeigen

Feeds

Anzeigen nach

Frage


quasi-Newton method with initial Hessian + preconditioning
I am heavily dependent on the quasi-Newton method in the minimization of nonlinear energies f(x)-> min discretized by the fi...

mehr als ein Jahr vor | 1 Antwort | 0

1

Antwort

Frage


A fast cell array generation
Dear all, in our optimization procedure, we need to create a cell array 'v_indices' from a vector 'v' and another cell array of...

mehr als 3 Jahre vor | 1 Antwort | 0

1

Antwort

Beantwortet
Minimization of a function with unknown gradient but known sparsity pattern of its hessian
Dear colleague, based on our discussions from yesterday, I implemented a finite difference scheme for a gradient approximation ...

mehr als 4 Jahre vor | 0

Frage


Minimization of a function with unknown gradient but known sparsity pattern of its hessian
Dear colleagues, is there a fmincon option to minimize a function without the knowledge of its gradient but providing a sparsit...

mehr als 4 Jahre vor | 2 Antworten | 1

2

Antworten

Frage


Is there any gradient descent method available?
We are working on the optimization of nonconvex energies in mechanics of solid (see the attached picture) resulting from the fin...

mehr als 5 Jahre vor | 1 Antwort | 0

1

Antwort

Frage


Matlab Exchange - More authors to one contribution
We are three persons in a team finishing up a Matlab package to upload. I already have an account, but my colleagues not. If the...

etwa 6 Jahre vor | 2 Antworten | 1

2

Antworten

Frage


vectorization of anonymous function?
I managed to vectorize the function below using inline command: u_function=inline(vectorize('sin(x*y*z^2)'),'x','y','z') x=[...

mehr als 7 Jahre vor | 1 Antwort | 0

1

Antwort

Beantwortet
fill3 command working strangely?
Additinally, I also notice that replacing both commands fill3(X,Y,Z,Z) by patch(X,Y,Z); result in the same issu...

mehr als 8 Jahre vor | 0

Frage


fill3 command working strangely?
I came accross a difference in the execution of fill3 command in the following code: figure; subplot(1,2,1) X=[0 1 1 0]'...

mehr als 8 Jahre vor | 2 Antworten | 0

2

Antworten

Frage


Visualizations of finite element calculations too slow?
I have a vectorized finite elements code for my study problems in mechanics, I am very happy with. It computes several fields on...

mehr als 11 Jahre vor | 0 Antworten | 0

0

Antworten