What are the inconveniences of a linear quadratic regulator (LQR) used in seismic vibration control ?

Dear colleagues, greeting I'm working on a new type of controller that can substitute the classical controllers such as LQR (linear quadratic regulator). Hence, I want to know more about the...

02 March 2018 3,264 7 View

Dose the lost of exclusivitiy of information affected the motivation of the teachers ?

Greeting, I'm asking this general question for teachers and professors in all fields. With the advances of technologies and communication technics the exclusivity of the scientific information...

01 February 2018 968 12 View

What is the fault type of Christchurch, New-Zeland (2011) earthquake ?

Greeting to all researchers; I'm using a set of a near-fault, far-fault earthquakes in a study, and I want to use the Christchurch earthquake record. However, I'm confused about the fault nature...

11 December 2017 6,408 5 View

How to design a base isolator for a share frame structure ?

Dear researchers; I'm working on modelling a share frame structure in MATLAB the only parameters I have are: mass, stiffness and damping. and I want to design a base isolator for this kind of...

31 December 2016 8,816 4 View

Is there any benchmark model for 3D building under seismic excitation ?

Dear researchers; I'm trying to apply some semi-active control on a 3D building excited with uni-directional or bi-directional excitations, with and without eccentricity (rotational degree of...

05 June 2016 6,227 2 View

How to verify the results in a numerical study ?

03 April 2016 2,095 4 View

Why some researchers try to monopolise the science ?

Dear researchers; I've seen a lot of research scholar complaining about getting their work rejected by some reviewers, just because those researchers don't want some else to publish in their...

31 December 2015 9,909 4 View

How to write a 3D building motion equation ? and how to solve it in state space ?

11 December 2015 655 9 View

How do I apply harmonic loading to a 2 storey building frame in ANSYS or ABAQUS?

dear researchers I want to apply harmonic sine load to 2 story building frame. Building is going to model in Ansys/Abaqus and this for time history analysis of the structure. also suggest which...

11 December 2015 2,802 5 View

Do you have any software for Semi-active control device modeling?

Dear researchers ; Does anyone knows a good software for modeling and controling semi-active devices, such MR damper, ER damper, STMD? Kind regards

03 April 2015 8,158 10 View

Timeout error!! Processor in the loop (PIL) using STM32F4 Matlab 2018a?

Dear Researchers I am trying to perform a PIL simulation using STM32F4 Discovery board and comunication serial USB TO TTL. During simulation I receive the following timeout error: An error...

01 March 2021 2,327 1 View

No title

I am trying to find how to know the density needed for a pva electrospinning in a 0.6mm neddle, the electrospinning will be from top to bottom and the problem I really have is the solution because...

25 February 2021 2,615 3 View

How Can I clain a removal of a co-author?

I would like to make a correction in a co-author in your paper which is wrong. This name is also in other papers of Kenton Ko. Zey Ko is not a Co-author . The correct name is Zdenka...

24 February 2021 3,476 4 View

How does the injection volume impact LLOQ and ULOQ in regression analysis (LC-MSMS)?

Hello, I have run into an issue that has sparkled a debate at work: is the LLOQ/ULOQ impacted by injection volume under the following circumstances: 1) Same dilution factor of all samples 2)...

23 February 2021 9,159 3 View

Difficulty in debugging code to correct error - TypeError: '<' not supported ?

I am trying with a Unet code ontained from net ...in tensorflow. When trying to predict the segmentation result with the trained and saved model with metric " iou" using "CustomObjectScope"...

22 February 2021 5,254 1 View

How to perform Haldane correction on SPSS?

I was wondering if anyone knew how to perform the Haldane correction for SPSS (this is the definition of the correction -...

21 February 2021 2,882 1 View

absorption= 1-mag(S(FP1:1,FP1:1)*S(FP1:1,FP1:1))-mag(S(FP2:1,FP1:1)*S(FP2:1,FP1:1)) is it correct for absorption ?

hi everyone I am simulating a unit cell structure in HFSS using Flouquet port having two modes for absorption I have used this formula:- absorption=...

17 February 2021 9,178 2 View

How can I calculate the magnetic force applied from a magnet (no electrism)?

I would like to calculate the magnetic force on a Fe304 particle which is into a liquid solution . The magnet is above the solution , and there is no electricity. I found this formula : F = (V...

13 February 2021 4,770 3 View

What is the best way to do symmetry in ANSYS Fluent for flow between two concentric cylinders ?

I am working on Taylor Couette flow between concentric cylinders and the results are correct for the full case. however, I wanted to do symmetry case to improve the mesh. I have tried periodic...

11 February 2021 2,193 6 View

What is the ideal value of UACI for image encryption scheme?

UACI - Unified Averaged Changed Intensity between cipher images. Why some papers refer ideal value to be 33.33 and some refer it to be 33.46? Which is the correct value? (In reference to image...

11 February 2021 9,562 2 View