Systems Definition and 1000 Threads

Hi In my notes I came across the following sentences:- Any signal consisting of the system's characteristic mode is sustained by the system on its own. The system offers no obstacle to this signal. Not getting what it means. Please, a little help needed. :-) Thanks salil

Hi there I have an Photo Voltaic system size 141 kW DC. It gives me an about 13 000 kW/hr a month.(I'm in Hawaii) We planning to install a new system, size ≈800 kW DC. How can i calculate how much of kW/hr AC i will get out of new system? Is there is any special formula to covert DC to AC...

Does anybody know some ballpark figures for thrust to power, Newtons per watt, ratios for modern propulsion systems, mechanical drive train ie cars trucks, propeller driven craft, boats planes, and rockets. I've found one reference that states the F/P ratio for a DC-9 jet engine is 0.016 N /...

Hey everyone, I am an undergraduate mechanical engineering major considering a EE feedback controls course as an upper division elective. I have taken ME Control Systems and am also the Lab Instructor for it this semester. I am familiar with signals, filters, sensors, controllers etc. My...

today in my physics course we were using jacobians to transform coordinate systems. This made me wonder if there was a way of deriving an optimal coordinate system to use for a given problem. -optimal meaning most simplified equation of a surface or bounds of a constraint (ex. cylindrical...

Homework Statement Consider the system of equations x^2y+za+b^2=1 y^3z+x-ab=0 xb+ya+xyz=-1 1. Can the system be solved for x, y, z as functions of a and b near the point (x, y, z, a, b)=(-1, 1, 1, 0, 0)? 2. Find \frac{\partial x}{\partial a} where x=x(a, b) The Attempt at a...

in the literature, people are talking about 'quantum systems without a classical limit' could anyone give me an example?

Hello everyone, I'm now 3rd (of 4) year on theoretical physics studies. Recently I become very intersted in complex systems and complex networks. Can anyone give me some hint how to start learning this, some books, online courses etc.? Regards!

Homework Statement The system is given by: G(s) = 1/((s+0.1)(s+3)) I need to convert it to G(z), it's discrete form. The sample time T is 0.1 seconds. Homework Equations To convert it they give G(z) = (1-z^(-1))*Z-transform[G(s)/s] The Attempt at a Solution Obviously I...

(I think I could equally have posted this in the biology section!). I know nothing about formal structure of biology..and hope that I will be enlightened. My question is to do with naming systems in physics vs naming systems in biology.. In physics nearly all units that you care to...

curvilinear coordinate systems and "periodic" coordinates Hello, we can consider a generic system of curvilinear coordinates in the 2d plane: \rho = \rho(x,y) \tau = \tau(x,y) Sometimes, it can happen that one of the coordinates, say \tau, represents an angle, and so it is "periodic"...

can the double slit experiment be performed with systems other than light?

Hello physics forums, I am writing a paper and I am wondering how to calculate the entropy of mixing in a two dimensional system. I am sure that entropy increases with mixing in a two dimensional system, but I do not know what equation to use. Would I just use the same equation as for 3-d...

Homework Statement Imagine we are observing the motion of frictionless, elastically colliding billiard balls. Using sensible assumptions about the size of things, show that, if someone enters the room, small deflections of the balls due this visitor's gravitational pull will completely...

According to Faynman Lectures on physics in the chapter of geometrical vol1 ch27, the general rule for the resolution on any optical instrument is this: Two different point sources can be resolved only if one source is focused at such a point that the times for...

Please tell me how to become a successful embedded systems engineer. What books should I study...? I have a Bachelors degree in Electronics and communication. I have seen many job posts and requirements in it are huge. How can I achieve all those skills? Help!

Now i am suddenly confused with the concept of the center of mass. As we know , nucleus are a system of many-body,composed of nucleons. And their interactions are very complex between nucleons. I want to know, If we can observe a nuclei such as Ne20, how is the motivation of its center of mass?

http://www.scribd.com/doc/66759813/mat223tut1" Question 2 and 3 Homework Statement For what values of c does the system have no solutions? I figured out the other ones, for c=0 we can assign a parameter to x1 and it will then have infinite solutions. For c=1 the system will have a unique...

Hi folks, The CRT says there's a unique solution to the system of congruences x = a (mod m) x = b (mod n) x = c (mod p) in (mod mnp) when m, n, p are pairwise relatively prime. But what if m, n, p are NOT pairwise relatively prime. Is there a systematic way to solve...

Oscillating mechanical systems. find maximum velocity and acceleration !? A mass of 0.3 kg is suspended from a spring of stiffness 200 N m–1. If the mass is displaced by 10 mm from its equilibrium position and released, for the resulting vibration A) Calculate maximum velocity B) Calculate...

Discrete Mathematics -- Symmetric Closure Math help in Numerical Analysis, Systems of I can't seem to find the way to approach this problem. Because it has symbols I don't know how to type here, I have attached an image here instead. Please help me if you can. Any input would be greatly...

hi everybody..i do need the 4TH EDITION of b p lathi"digital,analog communication systems"..can anyone help me?

So I am 2nd year now and we started this new course Theory of Signals. Already I bumped into a wall when it came to understand basic stuff. Here is what I mean [PLAIN]http://pokit.org/get/0864633c869b647116b980428a07d4f1.jpg Here we have 4 functions, each representing one type of...

While not paying attention in class my friend made a joke that a cube squared was in six dimensions, or something like that. Terrible joke, but now I'm trying to figure out if it is valid to arithmatically combine the basis vectors for two or more coordinate systems to get a new one.

I had these two questions in a test and I was completely stumped. 1. Make a 1-2L buffer solution containing methanoic acid and methanoate ions and with a pH of 3.74 using 1.07molL-1 HCOOH, solid HCOONa, 1.04molL-1 HCl, 1.16molL-1 NaOH(not all together). pKa(HCOOH)=3.74 M(HCOONa)=68gmol-1...

Application of the Doppler effect and Kepler's 3rd law Homework Statement (*This isn't the exact wording from a textbook, just as I had copied it down) An eclipsing binary star system containing stars A and B in concentric orbits (about their common centre of mass) has it's maximum red- and...

Hey guys, having a little trouble understanding whether or not a system is causal or not. I d'nt think this classifies as homework; at least I hope not. Basically I'm confused as to how you would go about determining whether or not a system is causal. For example, say any function x[n] =...

I know the recession is upon us therefore, I want to know if recession can affect any fresher in this times who opt for career in Embedded systems. How is the job market in USA or around the globe for Embedded systems? Are any companies hiring new people in Embedded systems?

Firstly hello, this is the first time I have posted here (although I have used the site to find info in the past). My query is best illustrated, I think, with an example. Suppose we have some physical system with corresponding state vector \left| \psi \right> = a \left| 0 \right> + b \left|...

show that S and T have the same span in R^3 by showing that the vectors in S are in the span of T and vise versa. S= {(1,0,0), (0,1,0)} T= {(1,2,0), (2,1,0)}im a little confused on how to start off on this problem.. help?!

Homework Statement Consider the following two system of equations: y_{1}=-2x_{1}-x_{2}+2x_{3} y_{2}=2x_{1}+2x_{2}-3x_{3} y_{3}=-2x_{1}-2x_{2}+2x_{3} and z_{1}=3y_{1}-4y_{2}-3y_{3} z_{1}=3y_{1}-y_{2}-4y_{3} Rewrite these 2 systems as Ax=y and By=z. Use this to get C so that Cx=z...

Firstly, I am not an engineer or engineering student. I come from an art/creative background. However, in what may be arrogance, I'm convinced I can solve a problem that no one but me thinks is a problem. Further, I'm spitting in the face of a system that has been fine for everyone else for...

I have this math packet for homework and it has loads of problems on systems of equations and matrix. The last few problems have been bothering me. Here it is: To manufacture an automobile require painting, drying, and polishing. Epsilon Motor Company produces three types of cars: the Delta...

Hi first time poster. I have a question which has been intriguing me for some time. Are most chaotic systems also chaotic if played backwards in time? For example if we played a video of a double pendulum, will it exhibit the similar chaotic behaviour if played to someone in reverse? I guess the...

Hey guys, I was wondering if I could receive any help on a homework problem I have. I need to find the differential equation relating the input to the output. I've began working on it but feel like I've hit a brick wall in my work, any input? Homework Statement Attachment - Problem...

Hello all, I was recently accepted to a program overseas that offers said degree. I think it sounds great, but I'm more than slightly worried about job prospects in the field. Can anyone offer advice?

Homework Statement For the cartesian, cylindrical, spherical coordinate system, prove that \nabla.\vec{r} = 3 and \nablax\vec{r}=0 Homework Equations For cylindrical coord system, \vec{r} = s\vec{s} + z\vec{z} \nabla = \vec{s} \delta/\deltas +...

I just started my first graduate level controls class this semester, and it looks like my professors notes aren't going to be quite enough. Can anybody recommend a good book with lots of state space representation examples, or if not a book, a website would do fine as well. Thanks for any help.

Hi, I need a hand with my reasoning on the following question. I have answered all the questions, but not too sure weather they are correct. Please guide me or point me on the right direction if they are not correct. Regards 1. A system defined by the following equation y(t)=[x(t-2)]^2...

hello everybody! T1=A T1'+B(T0'+T2'+T0+T2) T2=A T2'+B(T1'+T3'+T1+T3) T3=A T3'+B(T2'+T4'+T2+T4) if A,B,T0,T4 and everything in (') character is known, i have T1,T2,T3 to find and 3 equations. how do i use MATLAB to solve this?(i have a...

Homework Statement Let be Ax=b any consistent system of linear equations, and let be x1 a fixed solution. Show that every solution to the system can be written in the form x=x1 +x0, where x0 is a solution Ax=0 . Show also that every matrix of this form is a solution Homework Equations...

Thanks for reading! Homework Statement I have been given a proof for the lorentz transformations (which I only partly understand) that relied on the two relativity postulates (equivalence of inertial systems and the speed of light being constant) for the case of two standard inertial...

This is an extract from my lecture notes: "For classical stochastic systems, w(p,x,t)dpdx = prob. particle is in dpdx. w\geq0 \int dp \int dx w(p,x) = 1." 1. Can anyone please explain what a classical stochastic system is? 2. Why is there a question of probability in analysing such a...

Some say that there are parts but their properties depend on the whole. But if we cannot assign properties to the 'parts' of an entangled system, what can it be to be a 'part' or any kind of entity in the first place? Can we say that there are parts but that they are not independent? What can...

I have some questions about what I think is a fairly standard and common short-hand notation used in physics. Today I watched lecture 2 in the nptelhrd series Classical Physics by Prof. V. Balakrishnan. In it, he models a kind of system called a simple harmonic oscillator, I think using TC =...

[b]http://ocw.mit.edu/courses/electrical-engineering-and-computer-science/6-061-introduction-to-electric-power-systems-spring-2007/assignments/ps1ans.pdf Problem #3 Where do the minus signs come from in the admittance matrix? also, there is this statement "Thus it is clear that R3 = 1/3...

Hi everyone I really don't know how to start this questions, please help me. Thank you in advance for all your help & support. Determine if each of the following CT signals is periodic. If periodic find it period. a) x(t)=2sin(10$$\pi$$t-30degrees) b) x(t) = 2 cos ($$\sqrt$$2$$\pi$$t)...

Has anyone ever noticed that the online portals for things like schools, colleges, and banks are flat out awful, while sites like newgrounds feature state of the art online portals?

The cytoskeletal structures were considered responsible for the elementary cellular intelligence in the past. (For example, see the articles from Albrecht Buehler. http://www.basic.northwestern.edu/g-buehler/FRAME.HTM.) Microtubules are pipe-like structures made of two kinds of proteins...

[b]1. I have not seen IEEE 1547-2003 as this question pertains to it. They say that small PV systems are tied into the grid, if the wave sign of a PV inverter is a square wave how does that marry to the wave of electricity flowing on the existing grid? Does this current just get gobbled up so to...