How to formulate a "time-optimal" control problem with pseduospectral method?

More Jie Yao's questions See All

What is the principle/mechanism behind aging of carbon (graphite) containing refractory mix for isostatically pressed refractories?

The resin bonded carbon containing refractories are aged before use. How time of aging is determined? And mechanism behind aging.

23 July 2024 3,205 0 View

When I am trying to distill triethyl amine while drying it over calcium hydride. How do I design the setup to let hydrogen escape without losing NEt3?

I am new to research. The boiling point of triethyl amine (NEt3) is 89 degrees centigrade. I am skeptical that when I will let the hydrogen escape which is getting generated in situ, I will also...

21 July 2024 7,284 4 View

Why my gel electrophoresis have shadow bands? Please see the attached picture for the gel electrophoresis ?

Sometimes I see the shadow like bands and its not true band. I want to know that what's the reason for it. I am using 2% gel for running genotyping samples I have uploaded the gel picture in both...

19 July 2024 148 6 View

What is the future scope of acoustic emission?

17 July 2024 1,510 1 View

Is the protecting group boc of the amino group stable at 37°C?

I have a small molecule reagent with a boc-protected amino group. Now the reaction needs to be reacted at 37°C for 30 h. Is this protection group stable?

12 July 2024 3,745 2 View

Why can't I detect the plasmon resonance angle with water?

I am trying to measure the plasmon resonance angle of gold film and pure water using the Kretschmann configuration and a 633nm laser. Without flowing water over the gold, I can detect a clear...

10 July 2024 4,719 3 View

How can we generate topology file for water and helium system?

Hello! I am facing a problem, I tried using pdb2gmx to generate topology file but it shows error HEA residue not found then I tried copying the forcefield file and edited accordingly but again...

24 June 2024 1,242 0 View

Best Tools for Wrist PPG Signal Analysis: Your Recommendations?

I'm conducting research on photoplethysmography (PPG) signals obtained from smartwatches worn on the wrist. The main goal is to analyze the PPG waveform and extract key fiducial points and...

13 June 2024 3,286 0 View

How can I increase the acidity in paper samples? or How can I do the Acid aging in paper samples ( restoration department) ?

The Acid aging in paper samples

10 June 2024 6,456 2 View

What is the mechanism of reactive oxygen species (ROS) generation in bacteria? Is it similar with plants ROS generation machinery?

For example, this article https://www.mdpi.com/2079-7737/11/2/155

09 June 2024 897 0 View

Are there any good simple systems or platforms to recommend?

In order to show people the beauty of control and enhance enthusiasm for learning control theories, are there any good simple systems or platforms to recommend?

05 August 2024 10,034 1 View

Senescence-associated beta galactosidase staining is False Positive in control group?

Hi guys If anyone is currently working on aging cells, you guys would like to give me some advice. I'm testing against biomarker (SA-beta-Gal), I encountered a false positive in the control group...

02 August 2024 6,735 1 View

Are current regulations effective in preventing cancer caused by toxins?

I am currently researching the impact of environmental toxins on children's health and would greatly appreciate insights from experts in the field. If you are an expert or researcher working on...

02 August 2024 4,474 2 View

Some new emerging problems on application of RL for scheduling in IoT networks?

I have seen plenty of existing works on applied Reinforcement Learning (RL) policies for optimized scheduling in IoT networks including Q-learning, DQNs, and the newer ones including PPO for...

01 August 2024 8,754 2 View

How to make a Lateral flow control line more uniform?

We have a lateral flow test on Sartorius 140 NC. The conjugate is gold-monoclonal antibody. Using different control lines (GAM, protein A, protein G) we get a very strong leading edge with reduced...

31 July 2024 4,510 3 View

What are the steps of formulating a herbal extract into a sheep/goat drench?

I am working on natural remedies for de-worming in small ruminant livestocks. Part of my project involves formulation of drench-type product, which I have not much experience in. My experience is...

30 July 2024 9,806 1 View

How to maintain the drug concentration in cell culture study for long term?

I am working in the filed of long acting drugs with Nano formulation. I want to study the efficacy of my formulation in 2D cell cultures while this required media change on every two days. In such...

24 July 2024 8,696 0 View

How I can add anew research in my account ?

Their is new research published in the biological control journal, and I am one of the authors. I want to add it to my account at researchgare. How can I do this?

21 July 2024 7,545 0 View

What does an additional peak in FTIR between 3100 and 3300 nm affect the quality of the material, benzethonium chloride USP??

I do not know much about FTIR! The material Benzethonium Chloride USP was compared to a reference standard in regards to FTIR, as per the USP testing: Identification B. Infrared absorption (FTIR),...

16 July 2024 6,918 7 View

What are the material management and inventory practices for a medium sized hospital in South Africa?

You have been appointed as the supply chain manager for a medium-sized hospital facing challenges in its supply chain operations. The hospital aims to improve material management, optimize...

15 July 2024 4,120 4 View

Roberto Ferretti

Dear Jie,

do you mean applying a psudospectral method to the open- or to the closed-loop problem? In other terms, do you plan to use the spectral base to represent the control or the value function?

Jie Yao

Roberto Ferretti Yes, I plan to do that as you said.

Mohamed-Mourad Lafifi

Dear Jie Yao,

I suggest you to see links and attached files on topic.

http://etd.fcla.edu/UF/UFE0043196/garg_d.pdf

https://ijnao.um.ac.ir/article_24905.html

Article A Pseudospectral Method for Optimal Control of Open Quantum Systems

Article Jacobi Pseudospectral Method for Solving Optimal Control Problems

Article A Gauss Pseudospectral Transcription for Optimal Control

Article A Pseudospectral Method for the Optimal Control of Constrain...

Best regards