# feedback

1. ### Singular feedback functions

Hey guys, good afternoon. Actually im working in cryptography, and reading a paper i found a notation that i cant understand and i´ve been searching a lot but i can´t find the meaning. The paper im reading is A Transformation From the Fibonacci to the Galois NLFSRs (Elena Dubrova). On page 3...
2. ### Feedback for Algebra 2 Videos

As a way of helping as many as possible with math, I'll be posting videos explaining various concepts on YouTube. You can check out my channel here (Radical Math): https://www.youtube.com/channel/UCS2JSDju0F3xla-GY00wGeg I just launched the channel a couple of days ago, and am constantly...
3. ### Scaling a Differential Equation: Feedback and Control Systems

Hello everyone. I have been having difficulties with my Feedback and Control Systems coursework, particularly this problem: Problem 3.4: Suppose the input-output behavior of a system is given by the LTI-ODE y''(t) + 3y'(t) + 4y(t) = 6u'(t) + 7u(t) The phenomena described by this...
4. ### Finding roots of a function using Brook Taylor's method(s) [Feedback]

Finding roots of implicit functions is usually only possible by applying numerical methods that perform iterative calculations starting with a guess or seed value. If such iterative calculations converge towards a values then we assume to have found one of the roots of the underlying function...
5. ### What is a feedback polynomial good for?

Hi there When I got a linear relation s_{m+2}=s_m-s_{m+1} its characteristic polynomial is x^2+x-1 and its feedback polynomial is -x^2+x+1 but what is the sense of a feedback polynomial? Where is it used? Where is it applied? In engineering or anywhere? Regards
6. ### feedback coefficient , K

Dear all, I have an equation to solve like below: xdot= Ax+Bu + D u=Kx How to find the feedback coefficient K? A=[1 0 0 0 0 0 0 0 0 0 0;... 0 0 0 0 0 0 0 0 0 0 0;... 0 0 1 0 0 0 0 0 0 0 0;... 0 0 0 0 0 0 0 0 0 0 0;... 0 0 0 0 0 0 0 0 0 0 0;... 0 0 0 0 0 0 0 0 0 0 0...
7. ### Derivative of arccos (+ feedback :D)

So I posted a lot of questions last night and this morning, I want to say thanks to all those who helped me. I am just back from the exam and yes most of the advice I got from you all was relevant to what came up in it... I believe I will have passed well ONLY because of the advice I got on...
8. ### closed loop poles and feedback coefficient matrix

I have a matrix equ: syms y1 y2 y3 y4 y5 y6 y7 y8 y9 y10 y11 y12 Ydot = Ay + Bu +H y=[ y2 y3 y4 y5 y6 y67 y8 y9 y10 y11]' u=[u2 u3 u4]' Can someone help me to determine the closed loop poles and feedback coefficient matrix when k =1. A= [k 0 0 0 0 0 0 0 0 0 0;... 0 k 0 0 0 0 0 0 0 0...
9. ### Optimization, need feedback on my solution please :)

So, here is the link to my "problem" and my solution is there beneath.. Advanced Math Answers | Optimization a lil question, A farmer has a specific amount of area for his sheeps tp sta This is a rather easy example, I just want your opinion please... Do you agree with my solution.. or has...
10. ### ebay feedback percentages

Hello Im new to the forum and would like to know how to calculate the additional number of sales i need to make in order to increase my feed back from 99.8 to 99.9 ? I cuurently have 887 sales and 2 negatives and the feedback is calculated by 887 / (887+2) = %age feedback. can anyone help ?
11. ### Looking for Solution Feedback

Could someone please review this problem that I have attempted to simplify. I'm not sure but I believe that I have completed everything correctly. log_{5}\frac{5^{-2x} (25)^y}{\sqrt{125^x}} \Rightarrow\log_{5}5^{-2x}+\log_{5}25^{y}-\log_{5}\sqrt{125^{x}}...
12. ### Feedback

Hello and thanks for a great forum. I just need some feedback on my calculations. I need to integrate this 1/x^2(1+x)(1+x^2). Was thinking of doing it by factorisation. This is how a proceded. Setting up the coefficients A/x + B/x^2 + C/(1+x) + (Dx + E)/(1+x^2) I multiply the...
13. ### Request feedback on basic integration concept

In my calculus text I have found something which is either a typo or a basic concept which I'm missing. I'd be grateful for opinions. (By the way, this is not the first such question I've posted. It's not being pedantic; rather, I just want to ensure I'm not learning the wrong thing, or...