Is it possible and practical to build an electronic box with this transfer function?

PID controller is reportedly widely built and used in control systems engineering for industrial applications. The PID-controller has a transfer function as: (Kd*s^2+Kp*s+Ki)/s. Therefore, it...

08 November 2020 7,771 10 View

What if we flip the role of actuator and plant blocks in a linear control system block diagram?

We all have been accustomed to see a block diagram for a linear control system, where in the forward path, first sits the controller, then actuator, and then plant. What if we flip the blocks of...

05 October 2020 9,363 21 View

What are the major causes of rejection of scientific papers?

What determines the success or failure in publication of scientific manuscripts? More often than not, scientific manuscripts are prone to rejection, because of the process being mysterious and to...

30 September 2020 768 1 View

Is it possible to control a control system in real domain, with a control signal which contains complex (imaginary) values?

Assume we have a control system in state space as: xdot1=u1, xdot2=u2, where x is state and u is control. I am interested to know the possibility of complex valued control signal to control such...

27 August 2019 7,065 3 View

How to get and plot the surface of value function v(x,t), for an optimal control problem?

please catch a glimpse on the pdf attached to this question, and let me know, how to plot the surface of value function v(x,u,t). Please also remind me what are the names of coordinate system on...

16 April 2019 5,766 1 View

Why is control set in theoretical control systems theory, assumed convex?

I am interested to know, why is control set in control systems theory, usually assumed convex, more specifically, a convex cone, a convex hull or a convex set? Please let me know if you've gotten...

24 March 2019 7,247 4 View

Which one, tensor strain-rate or engineering strain-rate for 2D fluid flow analysis?

I am to know what is the difference of using tensor strain (particularly its rate) and engineering strain-rate for two dimensional fluid flow analysis. As you may know, the Navier-Stokes momentum...

16 August 2018 5,567 4 View

How can I solve these plain differential equations related to fluid-flow velocity vector field?

Assume: du= f1(u,v).dx+f2(u,v).dy (1) dv= g1(u,v).dx+g2(u,v).dy (2) f1,f2, and, g1,g2 are continuous and known functions. We know further that implicitly h(u,v)=0 and hence we...

25 July 2018 6,300 9 View

How to visualize fluid-flow vector field, having implicit ode of the velocity components?

I want to have insight over fluid-flow vector field, as I have an ordinary differential equation (ode): dv/du=-2(u2+v2)/(v2 - 5u2) where u and v are horizontal and vertical velocity components...

24 July 2018 4,828 5 View

What is the real model associated to ordinary differential equation: xdot=x^3+u?

As I know, the ordinary differential equation (ODE), xdot= -x^3+u, where x is the state variable, and u the control variable, is the control system associated to a falling object in atmosphere...

24 June 2018 7,903 99 View

What techniques can I use to determine the miscibility of polymer blends?

The term miscibility refers to the single-phase state in thermodynamics. I do not mean the compatibility of different components. To determine the miscibility I know several techniques such as...

03 March 2021 4,107 4 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

New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before?

Question to you and THEM, the New Journal, "Integrative Psychological and Behavioral Science" -- do you not know, and have you not seen, this done before? There appears to be a core problem for...

02 March 2021 3,024 2 View

Which is a lucid standard comprehensive book to guide on psychological scale construction and its standardization?

02 March 2021 7,082 3 View

LOAD DISPLACEMENT CURVES Stiffness increasing in ANSYS non linear analysis. HOW CAN I CORRECT IT?

Hi. I am doing non linear FE analysis using a new material beam under flexural 2 point loading using ANSYS. I have defined a bilinear material model. The solution has converged. In results I am...

01 March 2021 9,911 3 View

How to choose ANN number of hidden layers and nodes?

Hello, Could you please share any interesting research explaining how to choose the number of hidden layers and nodes per layer in case of regression problems using ANN? Thank you, any help would...

01 March 2021 6,200 3 View

PUC19 as a transfer plasmid for lentiviral delivery?

Hello, Is it possible to use pUC19 as a transfer vector to be packed in using the second generation viral particles packaging system( pMD2.G; psPAX2 plasmids)? As far as I understand it there is...

28 February 2021 4,868 2 View

Can anyone help me with the administration of the "Mind the Gap" Scale for satisfaction with transition to adult care?

We are working on a study focused on adolescents' transition to adult care and are looking for a validated measure for satisfaction with the transition. So far the only measure that we have came...

28 February 2021 2,338 1 View

How could I take into consideration the weights of observation in a system of seemingly unrelated regressions (SUR) in rstudio?

I build a model of 4 regression equations (probit and OLS) in R studio. I need to take the weights of observations into consideration. While it is simple to do so for every regression equation,...

27 February 2021 1,233 1 View

How to include original NMR data in a manuscript?

hello. i am junior researcher. I received a comment from a reviewer that he could not find NMR data in my submitted paper. I had included the NMR graph with explanation and formula to calculate...

27 February 2021 734 4 View