Tagged Questions
0
votes
2answers
40 views
matrix question - help needed
I am doing revision on matrices and came across this question. The solution (the matrix provided below the question) is there. I am not sure how or why 180 is in the position (1,4) (row and column ...
0
votes
0answers
32 views
How many ways we know to join two line segments?
This topic was created to discuss how many ways we know to create piecewise linear functions with smooth transitions between the phases. An alternative is presents by Bacon & Watts (1971):
the ...
5
votes
2answers
95 views
Are there rigorous mathematical definitions for these waves?
My friend linked this .gif to me tonight, and asked me if I knew of any equations that might model these bottom two waves (the blue and green waves). Unfortunately, I am not far enough in my education ...
1
vote
1answer
54 views
Creating a model
Here's a seemingly simple pondering.
If one item is more valuable the higher it is (i.e., $a=5$ is worth more than $a=2$) and another item is more valuable the lower it is (i.e., $b=2$ is worth more ...
3
votes
3answers
457 views
Cat Dog problem using integration
Consider this equation :
$$\sqrt{\left( \frac{dy\cdot u\,dt}{L}\right)^2+(dy)^2}=v\,dt,$$
where $t$ varies from $0$ to $T$ , and $y$ varies from $0$ to $L$.
Now how to proceed ?
This equation ...
0
votes
0answers
84 views
What curve best describes the cross-section of a river bed?
Assuming the water flows in one direction and at a constant rate and the material of the river bed is consistent, what curve would describe the cross-section of the river best (on the axis ...
0
votes
1answer
110 views
Question Based On Mathematical Modeling [Applied Functions]
An example of a calulus book reads:
A rectangular storage container with an open top has a volume of $10$ m .
The length of its base is twice its width. Material for the base costs $10$ per ...
-2
votes
1answer
71 views
How to change Hermite function to have a same shape with moving extremum point and zeros
If somebody has a experience with polynomials.
How to set this Hermite function to have a general minimum where I want on $x$ axis, for example in $0.5$. Is it possible to be in analytic form ...
-4
votes
1answer
206 views
Find The General Solution [closed]
Using separation of variables and partial fractions find the general solution:
$$dP/dt = re^{-at}p(1-p)$$
1
vote
0answers
286 views
How to approach mathematical modeling of the human heart problem?
I have to create a mathematical model of the human heart but it was quite a time ago I finished University and I experience some difficulties with the math behind the subject.
What is the necessary ...
2
votes
2answers
133 views
why does $\frac{b\partial a}{a \partial b} = \frac{\partial \log a}{\partial \log b}$?
I am doing some background research on sensitivity and elasticity analysis, and I came across the following definitions of elasticity:
$$e_{ij}=\frac{a_{ij}\partial \lambda}{\lambda \partial ...
6
votes
3answers
257 views
What sort of mathematical methods and models are used to model the brain
What sorts of mathematical tools, models and methods and theoretical frameworks do people use to simulate the function of the brain's neural networks? What mathematical properties do different brains ...
