Can anyone helps with parameter estimation in Matlab toolbox?

While running a Simulink model the error message appeared:"Derivative input 1 of 'md_3/Subsystem/Integrator1' at time 1.00003 is Inf or NaN. Stopping simulation. There may be a singularity in the solution. If not, try reducing the step size (either by reducing the fixed step size or by tightening the error tolerances)." Please help me solve this problem. I used ode4 (Rung-Kutta) with fixed steps. Thank you.

The laser 532 nm can penetrates around 700 nm depth in the sample, ( in the case, silicon cabide 4H) so then, the nickel silicide films we fabricated have around 150 nm thick. When we perform raman tests we can see only silicon carbide peaks. How to solve the depth problem of laser penetration ?

Can anyone help with Stiction transition and Friction transition velocities in MSC ADAMS Software contact?

I am simulating a pin on a disk both dry steel. I need to define friction in contact window. And at the end of contact properties window there are 2 coefficients called Stiction transition and Friction transition velocities. By default there are 100 & 1000 mm/sec.

As my simulation goes around 1.6 mm/sec should I replace the 1000 with 1.6? and as Stiction velocity should be lower than friction transition velocity should I change that 100 to something like 0.1 mm/sec?

what kind of noble gas (He, Ne, Ar) is safe to cut and open lithium ion battery in glovebox

I am submitting to the IEEE Access journal, but I do not find if it is allowed for co-first author in that journal. If allowed, is there any format that I can follow to designate my co-first author?

SiC substrate has the off axis tilt angle (3.5 ~ 8.5°) but such detail is not available on SILVACO (Athena / Atlas modes).

The anisotropy parameters are able to define the orientation (0001, 1120, etc), only.

I'm wondering if such tilt is possible, and even such adjustment is not possible, there is a way to perform some etching corrosion in order to obtain the structure with this "tilt", BUT, there will be a considerable difference at IV curves and breakdown voltage analysis???

I have numerous publications which i find difficult to add each and every one of it. It would be easier if i could add from my co-authors list. Pl guide me how to do it

Hello all,

i am trying to model a battery using electrochemical thermal coupled model, and while defining porous electrode, they are using exchange current density values.

How to calculate the values of reference exchange current density i0ref_pos and i0ref_neg, used in COMSOL Modeling of Lithium ion battery?

Good morning, I am trying to simulate a grid-forming inverter in a grid-connected microgrid. The inverter control comprises the nested inner voltage and current control loops, each with a PI controller, plus a conventional P/f ad Q/V conventional droop outer controller. I have barely set the controllers by trial and error but would like to study it in a more systematic way to improve said settings.

I am trying to develop a state space model to study the stability of the system. I am able to obtain the dynamic equations of the inverter but I fail to integrate the PI controllers in the model.

Could you please suggest some procedure or papers that could help me? Thanks in advance!