What is the advantage of finding positive solutions of differential equations?

03 March 2016 1 10K Report

why we want to find positive solutions of differential equations.? What is their advantages or applications?

No, our aim is to find solutions of differential equations which represent physical situations. It turns out that these solutions are positive. So first we show that the solutions are positive and then find them.

Badges
Science topic

More Payam Mokhtary's questions See All

What is disadvantages of converting differential algebraic equations(DAE) to differential equations(ODE)?

We know that DEAs can be converted to ODE's in index reductiom method. What is disadvantages of this procedure from the numerical point of view? What we can say about the relations between...

03 April 2018 10,039 3 View

Any specific pipeline or parameter to analyse total transcriptomics study of brain tissue samples?

I have two groups of brain samples, control and treated for example. It was total RNA nova seq sequencing. I tried all the available pipeline like: star+rsem+deseq2, Hista+stringtie+cuffdiff,...

27 February 2021 356 6 View

How can I simulate the optical absorption spectrum of a biomaterial (like DNA or protein) in COMSOL?

I need to simulate the optical properties of a biomaterial, namely DNA, in COMSOL. Basically I need to simulate the IR absorption spectrum of a cylinder filled with a 'concentration' of DNA. I am...

21 February 2021 3,043 3 View

How do you interpret theoretical vs. experimental reaction orders with respect to a reactant?

I recently came across a paper focusing on the hydrodeoxygenation of oxygen-containing compounds. The paper linearized the rate equation in order to determine the experimental reaction order with...

14 February 2021 8,254 2 View

Can I get the design of circular cylinder to fix thermocouple on the surface and cartridge heater in core ?

Respected Scientific Community. I'm interested to carry out experimental studies on a circular cylinder. But even after doing literature review I unable to get the exact design of the cylinder...

10 February 2021 6,221 1 View

Any recommendations for open-source survey form builder, which has option for semantic differential scale questions apart from Likert scale?

Asking this as Google forms doesn't allow multiple items in a semantic differential format.

04 February 2021 5,869 4 View

How can I implement a Generalized Estimating Equation method on spatially autocorrelated time-series data?

I used Generalized Estimating Equations (geepack in R) on my regularly monitored (twice a year) plant abundance data in grid cells to evaluate their trends of density. Since these are time-series...

26 January 2021 3,833 1 View

How to prove possibility/impossibility to analytically solve the functional equation f(a ln x^2)/f(x)=x/2a; and how to find out the solution?

This is my very first encounter with functional equation of this kind, and methods of series solution and differential equations are of not much help. The solution to this problem, or at least the...

25 January 2021 6,053 5 View

How to find nature of extremum of a functional? what are the mathematical prerequisites to understand it?

For a function, usually sign of second derivative (and if it is zero, even/odd index of higher order derivative whose numerical value is zero) is enough to detect whether the extreme point is...

25 January 2021 7,703 3 View

What is your raw statistical treatment preference?

Hi, I have raw data from [HG-U133_Plus_2] Affymetrix Human Genome U133 Plus 2.0 Array that I want to process using the Expresso function for Affymetrix microarrays. My samples include tumor...

22 January 2021 1,527 3 View

Do you have an example of an algebraic Hamiltonian vector field which possess a finite number of periodic orbits?

Is there a polynomial Hamiltonian vector field with a finite number of periodic orbits? Please see this MO question:...

21 January 2021 1,673 4 View