How can I find the null space of a matrix by using an optimization model?

As you know, the null space of a matrix A is the set of vectors that satisfy the homogeneous equation Ax=0. To find x (as the null space of A), I wrote two optimization models as below. I know,...

07 August 2019 8,468 20 View

How can I find the R&D Plan (Roadmap) of the 'power sector' of your country?

03 April 2016 865 6 View

What is the derivative of d[a(t) . y(t-1)]/dy(t)?

Hi, See the figure below, please.

10 November 2015 4,539 9 View

How can I highlight a cell of Excel sheet using MATLAB?

Hi, How can I highlight a cell of Excel sheet using MATLAB? Any help would be appreciated. Regards, Morteza http://mortezash.blogfa.com/

07 August 2015 3,350 7 View

What is the role of 'Nanotechnology' in the recent power system studies and applications?

I would like to know what the main role and importance of 'Nanotechnology' is in recent power system applications especially in the smart grid research studies. I believe that it will definitely...

31 December 2014 5,003 7 View

Can we ignore the O&M costs of wind power plants and PVs in comparison with their Capital costs?

I would like to know that is it possible to ignore the O&M costs in comparison with their Capital costs when we are going to find the optimal size of renewable energy sources such as...

11 December 2014 6,245 7 View

How can we practically curtail the surplus power/energy of a Wind Turbine in an isolated network?

Dear RG researchers, As you know, the power output of wind turbines is stochastic and thus it may occasionally be more than the local load. I think this is a controversial issue in the isolated...

09 October 2014 8,073 16 View

Technical and Economic Data for a typical Energy Storage System (ESS) (with the Capacity between 1MW up to 10MW)

Dear RG friends, I need "Technical and Economic data" of a typical Energy Storage System (ESS) or a small Pumped-Hydro System (PHS) (such as capital, operating and maintenance costs as well as...

08 September 2014 4,022 3 View

Would you mind providing some papers comprising economic data of a typical small-scale Wind Turbine?

08 September 2014 362 11 View

How can I transfer a 'SET' with high number of elements (entries) from GAMS into MATLAB using '.uels'?

Hello, I am going to transfer a 'SET' from GAMS into MATLAB. At first glance, it seems easy if the number of SET elements (entries) is low.For example, if the number of SET elements is five then...

07 August 2014 8,306 1 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 2021 0 0 View

fatal error

When I tried to energy minimization my system, I got fatal error as below. Fatal error: Atomtype opls_116 not found Although I've already added this line: ; include water #include "oplsaa.ff/spc.itp" to [molecultype] directive in my topology.

16 June 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

Why are the velocities so high in my Boussinesq approximation Fluent simulation?

Hello, I have a mechanism where air rises due to convective flows. In this simulation, nothing is driving the air except this. I understand that the Boussinesq approximation only works for small...

02 March 2021 4,910 3 View

How to calculate BREQ 3 questionnaire?

how to calculate BEHAVIOURAL REGULATION IN EXERCISE QUESTIONNAIRE BREQ 3 ,which contain 24 questions and each question has 5 answers (0- Strongly disagree , 1-disagree, 2- Neither agree nor...

02 March 2021 811 3 View

I am interested in medicinal chemistry field, which books are highly recommended to learn from?

I am at the beginner level in drug design and drug discovery, and I am interested to learn more about this field. Which books are highly recommended to start from and gives me all essential...

02 March 2021 8,437 2 View

Please suggest a good text book for "Research Methodology in Life Sciences". Which book would be good for PhD Scholars?

Please provide Book Title and author name

02 March 2021 9,059 3 View

Could any one guide me, to write research proposal for grant? ?

We have one plant, the local people using this for controlling blood sugar, the toxicity and antidiabetic activity of the plant is not reported yet, please guide from whag should be the process ?...

02 March 2021 2,300 1 View