Is it easy to handle discontinuities in objective function with mathematical optimization?

Mathematical programming is the best optimization tool with many years of strong theoretical background. Also, it is demonstrated that it can solve complex optimization problems on the scale of...

07 January 2021 8,757 22 View

Hi, Does anyone have a questionnaire about swarm intelligence?

Swarm intelligence (SI) is the collective behavior of decentralized, self-organized systems, natural or artificial. The concept is employed in work on artificial intelligence. The expression was...

03 January 2021 9,050 5 View

What do you think about improving metaheuristics using mathematical programming?

In recent years, many new heuristic algorithms are proposed in the community. However, it seems that they are already following a similar concept and they have similar benefits and drawbacks....

30 December 2020 5,017 34 View

Inverse analyse for concrete beam?

Hello everyone I want to model a concrete beam containing steel fibers and rebars, since I do not have stress-strain diagram in tensile of the concrete sample. I want to validate from the...

01 August 2020 6,935 1 View

How to calculated thermal resistance on induction motor?

Hi, I want to calculate the circuit of thermal resistance of an induction electrical motor. In some reference they draw circuit that shown resistance. like attached picture. Now i have a question...

19 July 2020 1,682 1 View

What is your suggested method and materials for producing UV-curable transparent coatings?

What are the easy methods for synthesizing UV curable resins? I need to synthesis UV curable coatings. MMA seems to have good features for transparent coatings, but the additives and synthesizing...

24 April 2020 3,256 7 View

What is the command for running comsol in the linux os?

I'm using comsol multiphysics on a cluster that operate linux os. i used this command to run and solve my mph file that named s4: comsol batch inputfile s4.mph outputfile s4solve.mph but the...

25 February 2020 5,691 1 View

How can one learn about the effects of an organic substance on the human body?

For example, we synthesized organic matter called A, at this point we want to know its effects on the human body. I wanted to know if there was a special device for this or were they using other...

16 December 2019 2,223 3 View

How to model Cyclic loading in Atena software?

Dear All I am modeling fiber reinforced concrete in Atena software But as you can see the hysteresis loops do not fit well with the experimental sample How to improve it?

09 December 2019 9,076 2 View

What is the best software for drawing geochemical diagrams?

Hello I have the geochemical data of the XRD and ICP analysis of the lake sediments and have to draw a graph to analyze them. I think Excel charts are not very attractive. What other software...

18 October 2019 192 3 View

error in running a model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

error in modelling model in Abaqus

Excessive rotation of nodes in node set ErrNodeExcessRotation-Step1

17 August 2021 0 0 View

MGL tools

20 June 2021 0 0 View

i have some problem with chtMultiRegionSimpleFoam

--> FOAM FATAL ERROR: Maximum number of iterations exceeded From function Foam::scalar Foam::species::thermo::T(Foam::scalar, Foam::scalar, Foam::scalar, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar, Foam::scalar) const, Foam::scalar (Foam::species::thermo::*)(Foam::scalar) const) const [with Thermo = Foam::hConstThermo >; Type = Foam::sensibleEnthalpy; Foam::scalar = double; Foam::species::thermo = Foam::species::thermo >, Foam::sensibleEnthalpy>] in file /home/ubuntu/OpenFOAM/OpenFOAM-4.1/src/thermophysicalModels/specie/lnInclude/thermoI.H at line 66. FOAM aborting #0 Foam::error::printStack(Foam::Ostream&) at ??:? #1 Foam::error::abort() at ??:? #2 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::calculate() at ??:? #3 Foam::heRhoThermo >, Foam::sensibleEnthalpy> > > >::correct() at ??:? #4 ? at ??:? #5 __libc_start_main in "/lib/x86_64-linux-gnu/libc.so.6" #6 ? at ??:?

24 March 2021 0 0 View

How to compare two groups with only two measurements?

Hiiiii everyone! I have an enquiry on statistical analysis. I was looking for many forum and it's still cannot solve my problem. I want to compare means of two groups of data but only with two...

03 March 2021 8,796 3 View

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10?

What's the best way to measure growth rates in House sparrow chicks from day 2 to day 10? Since, the growth curve from day 2 to 10 won't be like the "Logistic curve" it might not follow logistic...

03 March 2021 1,401 3 View

Resistor definition in Piezoelectric bimorph with ANSYS workbench

Hello, good day! I am trying to simulate similar bimorph piezoelectric harvester with below commands. However, the output power doesn't change with resistor value. Please help to find the reason. ET,10,CIRCU94,0 !SET UP RESISTOR R,1,100000 !RESISTANCE VALUE TYPE,10 !SET ELEMENT TYPE E,1,2 !CREATE RESISTOR BETWEEN NODES 1 AND 2 Thanks in advance Regards,

02 March 2021 0 0 View

Arena simulation - how do i model the following model in ARENA (see description) (new to ARENA)?

Hello, I'm fairly new to ARENA and I have the following problem: I have two queues in which, in each queue, a different order type arrives (both having an arrival rate of exponential 10). Order...

02 March 2021 2,431 3 View

How to repeat an operation on an atom selection for multiple times in PyMol?

Hi, I am trying to construct a multi-layer fibril structure from a single layer in PyMol by translating the layer along the fibril axis. For now, I am able to use the Translate command in PyMol...

02 March 2021 4,569 4 View

How to calculate average trend in maximum annual NDVI from MODIS?

I am wanting to calculate the average trend in maximum annual NDVI in Iceland from 2010-2020 using MODIS MYD13Q1 V6. How would I do this? I have currently inserted the NDVI bands from the MODIS...

02 March 2021 752 2 View