Ashraf Khalil

12 Questions 72 Answers 0 Followers

Questions related from Ashraf Khalil

What are the prices of the PV system components?

I would like to know the prices of the different PV system components which are he PV panel, the battery, the MPPT charge controller and the inverter. Is there any company that could provide you...

12 July 2019 7,462 5 View

How to represent 3D and 4D data in Matlab?

I have two functions; the first is Z=f(x1,x2,x3), and W=f(x1,x2,x3,x4), where x1,x2, x3, and x4 are vectors. Z is three dimension matrix and W is four dimension matrix, what are the possible ways...

03 February 2018 1,688 3 View

Is there an algorithm faster than the binary iteration?

I want to find a value in the range 0-x, using the binary iteration this interval will be halved each iteration but at each iteration I need to solve complex time consuming problem, are there...

09 December 2017 3,841 6 View

What is the percentage of the DC electric loads?

The number of consumer electronics has increased considerably specially in residential buildings, I would like to know What is the percentage of the DC electric loads? or any research papers...

24 October 2017 6,823 7 View

How could the independent researchers pay for conference and journal fees?

Journal fees.

09 September 2017 455 27 View

Is the multiplication of positive definite and negative definite matrix is a positive definite matrix?

Is the multiplication of positive definite and negative definite matrix is a positive definite matrix even if they do not commute.

07 September 2017 5,906 9 View

What are the most widely used methods for analyzing the stability of time delay systems in practice?

The control theory is rich with the methods for analyzing the stability of time delay systems, however, these methods are usually very complex for engineering practitioners to apply on practical...

27 August 2017 1,052 8 View

Is there are any negative environmental effects related to the renewable energy in the future?

With the high penetration of the renewable energy in our energy mix, would be there in future bad consequences on the environment, the ecosystem or the life on the earth.

10 August 2017 5,941 7 View

Is there any approaches or directions rather than transforming our variables from time domain to frequency or complex frequency domains?

We always express our variables as function of time, x(t), for linear time-invariant systems we usually use Laplace transform to analyze them, for nonlinear and time-varying systems we use...

06 August 2017 9,349 3 View

Free software for calculating the area of the rooftops for a city?

In order to investigate the technical feasibility of grid-connected PV systems the total area should be estimated first. Is there any free software for calculating the total area of the rooftops...

10 January 2017 2,357 9 View

What is the best wireless network that can be used for real time applications?

There are a number of candidate wireless networks protocols proposed for real time applications (the feedback is closed through the wireless network), I would like to know the most promising one...

17 December 2016 3,613 18 View

Are the wireless control and multiagent systems the only directions for the future Microgrids and Smart grids in general?

The advances in wireless networks made them viable for control actions and energy management signals exchange. The multi-agent is promising for both control and management of MGs, are there any...

30 November 2015 1,771 3 View