Can you help me with a natural language processing text tagging problem?

I have the following project where I need to tag news items with company names to which these news items are relevant to (company names are mentioned in the news items and in many cases, in the...

06 July 2014 7,904 17 View

Can anyone provide a survey article on algorithms in use for text tagging?

I am new to Natural Language Processing. I am wondering if someone can help me by indicating recent reviews/survey article(s) which deals with recent advancement in text tagging.

05 June 2014 4,277 4 View

How to sample a smaller data set from a very large data set ?

I have a very large dataset with dimension given by (203000 x 150), with some of the columns (attributes) have a very large number of missing values, denoted by NA. I need to sample a smaller...

08 September 2013 1,789 14 View

Regarding Prime numbers.

I happen to notice the following interesting property of some of the prime integers: For example, 13 and it's permutation, 31 are primes. 17 and it's permutation 71 are both primes. But not 19 ,...

03 April 2013 3,216 7 View

Can anybody direct me to a recent review of the algorithms in use for computing molecular surfaces ?

Can anybody direct me to a good recent review of the algorithms regarding computing molecular surfaces ? Thanks

31 December 2012 8,696 1 View

Is it always an integer ?

I am trying to figure out if the following expression: (n^2 - n)! / ( n! ((n-1)!)^n ) is an integer for all positive integer n. I tried the induction, but the induction case is running into...

31 December 2012 377 17 View

Is the product of k consecutive positive integers divisible by k! ?

I have checked several cases numerically and it works. I don't have a concrete proof. Does anyone have any thought on this to share ?

31 December 2012 2,966 80 View

Is there an R implementation of the HITON algorithm?

HITON is an algorithm for markov blanket discovery of a target variable. The algorithm first appear in this paper: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1480117/ I am looking for an R...

07 August 2012 3,666 2 View

Does anyone know if a causal relationship among methylation data has been worked upon already ? Does it make sense?

My expertise is in mathematics. I am not an expert in computational biology. So I may be wrong entirely.

03 April 2012 4,807 2 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