What are the most popular shrinkage methods?

Shrinkage methods are used in machine learning to select features and classify them. These methods are also referred to as methods of regularization regression. They include, ridge, lasso, and...

06 July 2019 2,872 2 View

In LASSO, do the selected features differ from one round of implementation to another?

LASSO ( Least Absolute Shrinkage and Selection Operator) is a regularization method used in logistic regression to select the related features of a high-dimensional gene expression data sets....

04 May 2019 2,419 3 View

Where can I find information about the k-out-of-n systems and their reliability?

Dear Colleagues, I am trying to use some results on m-spacings of the gamma (and exponential) distributions on the reliability of the k-out-of-n systems. I found a way to describe the life time...

31 December 2018 8,207 4 View

Is the use of mathematical axioms good or bad in mathematics? Is it difficult to prove axioms?

Some people consider mathematical axioms as points of strength of mathematics, other say that axioms are points of weakness. My question is why?! Is it so difficult to prove mathematical axioms?

11 December 2018 4,547 15 View

What are good subjects for master theses in the field of queueing models?

I am looking for recent subjects in the area of using Markov chains in queueing models or theory for the thesis of a master student in mathematics. Thanks a lot in advance. Mohamed I Riffi

01 February 2018 6,410 5 View

How to simulate a Markov Chain?

This Fall, I am teaching my master students an introductory course on Markov chains. I am looking for an easy/clear method to explain the theoretical basis of simulating a Markov chain; i.e.;...

09 October 2017 6,180 8 View

Do we really need to use the normal approximation to the binomial probabilities when testing statistical hypothesis?

Most of statistics textbooks approximate the binomial probabilities by the normal probabilities when testing binomial hypothesis especially when the sample size n is large enough. Now, since we...

09 October 2017 4,569 5 View

What would you do if you and your colleague agree to coauthor a paper and then he decides to write the paper alone and to publish it under his name?

What do you do when you and your colleague in RG agree to write a research paper and provide him with your ideas and some proofs and then he decided is to write the paper alone and to publish it...

06 July 2017 5,227 6 View

How can one describe the follwing conditional probability?

05 June 2017 7,309 5 View

What's wrong with the computation of the probability that the exponential spacing Dn becomes less than t>0 for the first time?

04 May 2017 9,773 11 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

What are the application of Fixed points thoery in Chemistry.?

It is said that fixed point theory has lot of applications not in the field of mathematics only but also in various areas. So I am looking for applications in Chemistry only..

26 February 2021 3,533 1 View

Can I ask did any good platform or journals for learning the calcluation on the reference governors and command governor?

Recently I face some problems with the mathematical ( calculation) on the reference governor and command governor, so I need some help from you all to get which platform or journal can let me...

23 February 2021 7,746 2 View

Special issue on PLS-SEM in Mathematics. Are you interested?

21 February 2021 5,601 3 View

What is the better software for approximation of 3D surface with equations?

I have a massive of x, y, z coordinates of 2D surface in 3D space, which builded in Ansys HFSS or AutoCAD. How can I get the analitical aproximation of this surface by formulas?

21 February 2021 3,444 7 View

How can I obtain a sine function along a path with known equation?

I have a symmetric airfoil with known equation. Now a sine function passes along the airfoil equation like following figure. I want to find the sine function in (x,y) coordinate system.

17 February 2021 1,594 12 View

Does learning mathematics exclusively improve cognitive abilities?

Teaching Mathematics at school to all students is commonly justified by the opinion that it improves their problem-solving skills and "makes them smarter" (whichever measure is implied by this). I...

15 February 2021 7,391 7 View

Can we help fellow mathematicians get free ?

https://terrytao.wordpress.com/2021/02/08/a-statement-from-mathematics-department-faculty-at-stanford-and-mit/ Terry Tao blogged about this unfortunate event. Kindly share among Mathematical...

08 February 2021 1,055 3 View

Theoretical computer virology ? is still alive ?

HI Everyone! I am asking to know by you, expert in cybersecurity and mathematics, if Computer virology (the one of Cohen and Andler) is still an active field of research. That research made in...

08 February 2021 7,613 6 View

Is there any research Mathematical perceptions depending on type of personalities?

My dissertation thesis is Perceptions of mathematical ceonceptions depending on Myers-Briggs Type Indicator personalities. It can includes methods of solving, understanding, imaginations of math...

07 February 2021 9,880 4 View