Recent content by aeronautical

Hey everybody, I am about to make some simplistic fan analysis for a hubbed axial flow fan (Single stage). What makes me confused is if I should use the classical "one stage" approach for compressor design or if there is another way to do this?! My aim is to carry out a simplistic analysis of...

Let F be a non-empty subset of a metric room (X,d) and define the function f: X→R through f(x)= inf_{y∈F} d(x,y)= inf {d(x,y):y ∈ F}. Please show that f is continuously uniform in the entire X. Please note that f(x)= inf_{y∈F} d(x,y) means that y∈F is written below the inf...it is hard to...

Well I don't know how to begin solving this problem...can you pls help?

Homework Statement Epidemic. Consider the following model of how an epidemic spreads through a population. First we will introduce some definitions: N = number of individuals in population Mk = the number of susceptible after k weeks Sk = number of infectious after k weeks Ik = the...

Is the Uniform convergence theorem a good approach?

Sequence converge uniformly? Homework Statement Define f_{n}: (0,∞) → R, through f_{n} (x) = π*x*exp(-πx), x > 0. Does the sequence converge uniformly in (0,∞) when n → ∞? f_{n} = f subscript n Can somebody please show me all the steps? Any ideas where i can start?

Homework Statement Solve the LP problem? Minimize -x_{1} - 5x_{2} + x_{3} when x_{1} + 3x_{2} + 3 x_{3} <= 4 - x_{1} - 2x_{2} + x_{3} >= -5 3x_{2} - x_{3} <= 3 x_{1}, x_{2}, x_{3} >= 0 Please explain how this process works (with all the steps), thanks. The Attempt at a...

Thanks...I have started to look at this problem from the beginning...and read some. Isn't the following a solution? My answer should be the product of of three numbers: N1 = the number of ways the people before the A3 B2 pairing can be arranged N2 = the number of ways the people after the A3...

Homework Statement Solve the matrix equation: [10 1 9 1 4 3 2 -1 3] X = 3X where X is a column matrix. Please show all the steps, thanks. The Attempt at a Solution I think the solution is X = kU, where k is any constant and U is the vector... yet not really sure how to...

I can follow you on what you wrote. The ordering of Bs are determined by As. So you mean to say that the number of possibilities are 11-6=5 possibities and the constraint brings that down to 5 minus 2 = 3 possibilities?

Thanks...well I am just confused why you say 'just one'. Cuz If i consider the second case it is 2. Cause I can put 5 balls into 11 slots...only two ways. And when i consider the union I know that the possibilities will be even less...how can i account for the number of possibilities is it only...

thanks for shedding some light, the problem is that i can't figure it out. i know that there is a way, i just never got into probability. I don't know how to solve this

Homework Statement Imagine that there are two lines of people standing by two different cashier spots (cashier 1 and cashier 2) in a department store. A_{1} stands first in line by cashier #1,and is followed accordingly by, A_{2}, A_{3}, A_{4}, A_{5}, A_{6}. In the same manner B_{1} stands...

im sorry but I am lost. this is very tricky. i don't understand this table

Homework Statement Determine if the following is a tautology: ((p → q) Ʌ (q → p) → (p Ʌ q) I don´t know how to show this. Can somebody pls show me all the steps