Pro & Cons of MMA (method of moving asymptotes) and OC (optimality criteria).

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Science method

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How can we do FEM formulation without Gauss Intergration?

In 99-line topology optimization code of Prof. O.Sigmund the FEM is done without any gauss-integration carried out? I was wondering if someone could tell me the underlying theory behind this...

31 December 2014 4,208 14 View

How small can we make a FEM mesh to so that the continuum approach still holds?

In FEM we use the continuum model of the system and mesh it to solve for the solution but what is the lower limit for the mesh so that this continuum approach still holds and at what point we...

11 December 2014 6,869 2 View

Can anybody tell me why I get differences in results when computing on a supercomputer compared to standard PC?

Yesterday, I ran a MATLAB code, which has thousands of loop and 15 subroutines to calculate per iteration and there are 100 iterations, on my computer and my department supercomputer. There was a...

09 October 2014 8,546 25 View

Can anyone suggest a Matlab Movie Making Tool?

I want to make small size high definition movie from MATLAB figure output, which updates every loop and total number of loops can be upto 1000. I have used .mpeg and .avi outputs. MATLAB produces...

08 September 2014 9,429 9 View

Does anyone have knowledge on positive/ semi-positive definite matrices?

Is this matrix a positive or semi-positive definite matrix ? [ 2 0 0 0 0 2 0 0 0 0 2 0 0 0 0 0 ]

07 August 2014 4,173 5 View

quality of matlab plots?

matlab high quality plot codes

07 August 2014 6,524 6 View

Is periodic boundary condition in homogenization theory valid?

Is using periodic boundary condition in homogenization theory at microscopic scale for identical micro-structure unit cell a good approximation or not? What are the other techniques that we can apply?

05 June 2014 10,134 5 View

Example boundary condition for thermal diffusion problem in FEM?

The 1D thermal diffusion problem is as follows: div[k grad(theta)] = ro * c * du where: ro = density, k = coefficient of thermal conduction , c = specific heat at constant deformation, du =...

31 December 2013 7,165 8 View

Structural dynamics, wave propagation, time integration schemes?

I have made a matlab code for wave propagation the problem is as follows: div[E grad(u)] = ro (d2u) E=modulus of elasticity, ro = density, d2u = acceleration. I applied two time integration...

31 December 2013 7,574 4 View

Why is it important to have a Weak Formulation for FEM?

Why is it important to have a Weak Formulation for FEM and why it does not give accurate results? What type of method and techniques are available to get accurate results using weak formulation?

09 October 2013 1,198 59 View

How can I apply boundary conditions in an orthotropic steel deck numerical model using ABAQUS software?

I am trying to simulate vehicular loading on an orthotopic steel deck bridge section in ABAQUS software. The red arrow mark in the attached figure indicates the direction in which the vehicle will...

08 August 2024 719 0 View

How are iso-frequency contours plotted?

Let's say we have a standard, regular hexagonal honeycomb with a 3-arm primitive unit cell (something like the figure attached; the figure is only representative and not drawn to scale). The...

07 August 2024 1,937 1 View

Stability of the Solar System: Insights from Einstein’s Equations ?

The stability of the Solar System is a complex subject that blends the classical framework of Newtonian mechanics with the modern insights provided by General Relativity (GR). Understanding this...

07 August 2024 2,569 1 View

Hello all, Looking for international reviewer to review Ph.D thesis in wireless sensor network.Can anybody help?

My name is Apurva Saoji. I am a Ph.D scholar in Computer engineering in India. I am looking for international expert in reviewing my PhD thesis, "Competitive Optimization Techniques to Minimize...

07 August 2024 4,600 2 View

Research Methodology - Impact of Corporate Reputation on Stakeholders Behaviors?

Please can anyone support with the survey questions based on RQ measures and propose how to do it in FMCG industry and include as well the role of brand equity Thanks

06 August 2024 949 0 View

Anyone having idea about VN primer for miRNA primer design ?

How to design VN primer to attach with universal reverse primer

05 August 2024 2,116 3 View

If we are using snowball sampling technique, how do we justify the true representativeness of the sample statistically? is there any statistical test?

Are there any statistical methods to justify your sampling technique using SPSS or AMOS?

05 August 2024 9,153 4 View

What are the shear and normal stiffness values of an LLDPE liner in 3D numerical modeling of a stockpile?

I am seeking experimental or applicable data for the liner (LLDPE) interface in FLAC3D numerical modeling of a large stockpile. Could you please recommend suitable references? The preferred data...

05 August 2024 3,665 0 View

What are possible strategies can be used to analyze data under sequential explanatory mixed method approach?

Better ways to analyze the qualitative and quantitative data in a sequential explanatory mixed method approaches

04 August 2024 2,703 6 View

Short Synthesis of Graphene Oxide from Natural Graphite Flakes?

I am in search of a modified Hummer's method, which can be used to synthesis graphene oxide within 6-8 hours. As I am a student it is not allowed for us to work after 5 in the laboratory. So I am...

01 August 2024 8,368 2 View