content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Motor Position: Root Locus Controller Design
DC Motor Position: Root Locus Controller Design
Key MATLAB commands used in this tutorial are: tf , rlocus , sgrid , pole , minreal , feedback , step
Contents
From the main problem, the open-loop transfer function of the DC Motor is given as follows.
(1)
The structure ... | 4 | [
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0.00994... | 5,400 | 5400 | |
Calculus - Area of a curve
Hi all. I am onto Calculus now. Thing is, I have only done 2 lessons and never studied it before. I'm getting on alright, but I have a really hard question (well, hard to me). It's an extra question,
so if I don't do it it isn't a big deal, but I am trying to figure it out.
This (if it work... | 5 | [
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-0.082... | 5,401 | 5401 | |
MathGroup Archive: December 2007 [00125]
[Date Index] [Thread Index] [Author Index]
Re: different eigenvectors
• To: mathgroup at smc.vnet.net
• Subject: [mg83910] Re: different eigenvectors
• From: Jean-Marc Gulliet <jeanmarc.gulliet... | 5 | [
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... | 5,402 | 5402 | |
Carry look-ahead
V22.0436 - Prof. Grishman
Lecture 10 - Carry look-ahead
(text, section 4.5)
(discuss MIPS ALU - lecture 9 notes)
Carry look-ahead
• simplest adder is "ripple carry" slow (delay time linear in size of operands)
• add time is usually critical in determining overall cycle time of a machine
• c... | 4 | [
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Probability
January 22nd 2007, 12:12 PM
mauro21pl
Probability
Hi to all
I have few short questions if you would like to look at them
a)in how many ways can 3 boys and 3 girls sit in a row?
b)in how many ways can 3 boys and 3 girls sit in the row if the boys and the girls are each to sit together
... | 4 | [
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(SAT) Proportionality
January 11th 2011, 05:12 AM #1
Member
Joined
Sep 2009
Posts
145
(SAT) Proportionality
If 500 pounds of mush will feed 20 pigs for a week, for how many days will 200 pounds of mush feed 14 pigs?
Inversely proportional.
$\displaystyle 500\ \times\ \frac{20}{7} = \frac{10 000... | 4 | [
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Followup: Normal Mapping Without Precomputed Tangents
This post is a follow-up to my 2006 ShaderX^5 article [4] about normal mapping without a pre-computed tangent basis. In the time since then I have refined this technique with lessons learned
in real life. For those unfamiliar with the topic, the motivat... | 4 | [
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Forms of Fermat Equations and Their Zeta Functions
In this monograph, the notion of “forms” associated to Fermat equations, P[n]^r : X[1]^r+X[2]^r+ … +X[n]^r = 0, is developed. The main tool in this endeavor is the Galois descent. If K/k is a Galois
extension with Galois group G, and if X is an object defined over k, t... | 4 | [
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Ramification Indices
We keep our previous notation, that is, $K, L$ are number fields with $K \subset L$ and $R = \mathbb{A}\cap K, S =\mathbb{A}\cap L$. Suppose $P$ is prime in $R$.
The primes lying over $P$ are those that occur in the prime decomposition of $P S$. Their corresponding exponents are called the ramifi... | 4 | [
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logarithms/calculator/solving
November 18th 2007, 12:24 PM #1
logarithms/calculator/solving
Can't I solve these using my calculator?
If not, can you help me get started? I'm drawing a total blank. Thanks!!
4^x=1/256
and
10^log(3x)=4
$4^x = \frac{1}{256}$
It helps if you know that $256... | 4 | [
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Proof by induction (how did I do?)
May 14th 2011, 01:04 PM #1
Newbie
Joined
May 2011
Posts
4
Proof by induction (how did I do?)
Hi everyone, I'm new to the forums. I'm also fairly new to proofs, and I still commonly make mistakes, specifically regarding quantification errors and circularity. However, I b... | 4 | [
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Help needed. Writing ln(1 + x) as a convergent series
September 30th 2010, 06:59 AM #1
Junior Member
Joined
Apr 2010
Posts
56
Help needed. Writing ln(1 + x) as a convergent series
I have a problem in expressing ln (1 + x) as a convergent series. Can people show me the steps of doing this? thanks in advan... | 5 | [
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Centripetal force, weight, stress
and the Earth's equatorial bulge.
by Donald E. Simanek
Disclaimer: This document, like many others on this website, attempts to get across a complex bit of physics in language as simple, conceptual and non-mathematical as possible. This is, of
course, the hard way to do it. ... | 4 | [
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Help
Stellation of Polyhedra
This worksheet describes the stellating process to create new polyhedra from a given polyhedron. The stellate function is part of the geom3d package.
The Process of Stellation
Let S be a rotation t... | 4 | [
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5. Chi Squared Test
The Chi Squared test is to test the null hypothesis. The chi squared test will evaluate if there is a significant difference between your observed results and the expected results you predicted.
The formula is:
X^2 = ∑ (O – E)^2
E
• O = observed n... | 4 | [
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STEP Maths I, II, III 1989 solutions
STEP I (Mathematics) 1: 2: Solution by kabbers 3: Solution by Dystopia 4: Solution by Dystopia 5: Solution by Dystopia 6: Solution by Swayam 7: Solution by squeezebox 8: Solution by squeezebox 9:
Solution by nota bene 10: 11: Solution by Glutamic Acid 12: 13: 14: 15: 16: STEP II (F.... | 5 | [
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How can I prove that tan(angle) = opposite/adjacent
May 7th 2011, 10:52 PM #1
Newbie
Joined
May 2011
Posts
2
How can I prove that tan(angle) = opposite/adjacent
Hello,
Given the following naming convention:
It doesn't seam trivial to me to prove that the length of the segment named "tan \thet... | 4 | [
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STEP Maths I,II,III 1987 Solutions
(Original post by coffeym)
STEP I Q5
Let
Unparseable or potentially dangerous latex formula. Error 4: no dvi output from LaTeX. It is likely that your formula contains syntax errors or worse.
\displaystyle \psi=\int^{\beta}_{\alpha}{\frac {1}{\sqrt{(x-\alpha)(\... | 5 | [
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population of a city
January 16th 2011, 07:59 AM #1
Newbie
Joined
Jan 2011
Posts
2
Hi there
my question is
a city is laid out in the shape of a circle with a radius of 10 km.
there is a motorway that runs from east to west of the city along the centre.
The population density at a distanc... | 4 | [
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A
{Page 108}
FATIGUE CRACK PROPAGATION IN NIOBIUM
R. G. Dubensky
School of Technology, Oklahoma State University, Stillwater, Ok... | 4 | [
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Transforms of Derivatives and Integrals, Differential Equations
Use Laplace Transforms to Solve Differential Equations
And here comes the feature of Laplace transforms handy that a derivative in the "t"-space will be just a multiple of the original transform in the "s"-space.
That's precisely what we are going to do:... | 5 | [
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s
F-space
By Wikipedia
In functional analysis, an F-space is a vector space V over the real or complex numbers together with a metric d : V × V → R so that
1. Scalar multiplication in V is continuous with respect to d and the standard metric on R or C.
2. Addition in V is continuous with respect to d.
3. The met... | 4 | [
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Gathering some shock data
12-13-2011 #1
mtbr member
Reputation:
Join Date
Apr 2010
Posts
109
Starting a thread which hopefully will be useful to some people. My hope is to provide some good theoretical data about shocks, in particular to start off with air spring curves. Then move on to
providing some... | 4 | [
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Courtney Brown, Ph.D.
Mathematical Modeling of Complex Systems
Dr. Courtney Brown
Assignment #1
In this assignment, you will have fun with graphics while you investigate the various potential behaviors of the first-order linear difference equation with constant coefficients, as per our class
discussion. This will ge... | 4 | [
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Tangent planes anyone?
Find an equation for the tangent plane to the surface x^2+y^2-z=0 at the point (1,1,2) Any ideas? thanks
Find an equation for the tangent plane to the surface x^2+y^2-z=0 at the point (1,1,2). Your solution will be of the form $a(x-x_{0}) + b(y-y_{0}) + c(z-z_{0}) = 0$, where $a,b,c$ are constan... | 5 | [
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-0.06494140... | 5,424 | 5424 | |
Quadratic Equations
September 21st 2011, 01:08 PM
JibblyJabbly
Quadratic Equations
Hello there, I've got a quadratic equation. I'm supposed to solve it by factorising but it's already factorized.
$(x-2)(2x+1)=0$
Can you help me?
September 21st 2011, 01:15 PM
Siron
Re: Quadratic Equations
Use th... | 4 | [
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0.0281982421875,
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0.00... | 5,425 | 5425 | |
Maple
The D and diff commands can both compute derivatives.
When differentiating arbitrary functions, D and diff return expressions involving themselves. To switch between the two representations use convert/D and convert/diff.
When differentiating a symbol representing a mathematical mapping (the simplest algebraic ... | 4 | [
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... | 5,426 | 5426 | |
Barycentric interpolation: fast interpolation on arbitrary grids
Barycentric interpolation generalises linear interpolation to arbitrary dimensions. It is very fast although suboptimal if the function is smooth. You might now it as algorithm 21.7.1 in Numerical
Recipes (Two-dimensional Interpolation on an Irregular Gr... | 4 | [
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Composite Functions
I know this is really simple, but can someone help? f(x) = x+1/x-1 find (f o f)(x) Thanks!!
Wow, I knew it was simple, thanks so much, so basically it simplifies down to -1, correct?
Hmm I guess I thought that the fractions in the numerator and denominator would just cancel, but as I test my theor... | 4 | [
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Musimathics: The Mathematical Foundations of Music, Volume 2
Foreword xiii
John Chowning
Preface xv
Acknowledgments xvi
1 Digital Signals and Sampling ... | 4 | [
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Isosceles triangle problem Using right triangle trig
March 25th 2012, 08:37 PM #1
Newbie
Joined
Mar 2012
From
California
Posts
2
I am not understanding how to solve this one, so any help would be greatly appreciated!
Problem: An isosceles triangle has equal sides of length 10 cm and a base of 8 cm... | 4 | [
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Parallel Tempering Algorithm with OpenMP / C++ - Lindons Log
Parallel Tempering Algorithm with OpenMP / C++
1.1. Parallel Tempering Theory
1.2. Physics Origins
2.1 Intra-Thread Metropolis Move
2.2. Inter-Thread Parallel Tempering
2.3. OpenMP Parallelization
3. Full Code
4. Simulation Study
5. On the Future use of Para... | 4 | [
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Is the PEG Ratio a Valid Concept?
23
Feb
Is the PEG Ratio a Valid Concept?
This piece is a work in progress, so I solicit your feedback on it. How could it be improved?
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
I enjoy it when my expectations are proven wrong, because it me... | 4 | [
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Items tagged with numeric
I am a problem with solve differential equation, please help me: THANKS
g := (y^2-1)^2; I4 := int(g^4, y = -1 .. 1); I5 := 2*(int(g^3*(diff(g, y, y)), y = -1 .. 1)); I6 := int(g^3*(diff(g, y, y, y, y)), y = -1 .. 1); with(Student[Calculus1]); I10 := ApproximateInt(6/(1-f
(x)*g)^2, y = -1 .. 1... | 4 | [
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A quadratic function problem
August 11th 2010, 08:26 PM #1
Junior Member
Joined
May 2010
From
Palmy
Posts
64
A quadratic function problem
Can someone please solve or tell me how i would do this question. I'm finding it really difficult.
A projectile is launched from the top of a building. The he... | 4 | [
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Peano on Wronskians: A Translation - Additional References in the Articles
Hermite's Cours d’analyse de l’école polytechnique
Peano first referenced Charles Hermite’s 1873 textbook, Cours d’analyse de l’école polytechnique ([H]). Hermite actually was “proving” a theorem we saw stated in Sur les Wronskiens by Peano, na... | 4 | [
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Quadratic Expressions
In the package on Factorizing Expressions we looked at how to factorize quadratic expressions which have the number 1 in front of the highest order term, x
showing that the coeffcient of the square term, x
This is the information needed to find the factors of quadratic expressions.
Example 1
F... | 4 | [
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[SOLVED] Fourier Series
August 19th 2008, 02:11 PM #1
Junior Member
Joined
Aug 2008
Posts
57
[SOLVED] Fourier Series
Hi
I am having some problems trying to answer part of this question
I have attached file as I don't quite know how to upload the image... yet
I have done the first part and ... | 5 | [
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Pythagoras Lesson Plans & Worksheets :: 101 - 120
Pythagoras Teacher Resources
Find Pythagoras educational ideas and activities
Showing 101 - 120 of 232 resources
Tenth graders explore the Pythagorean Theorem and Pythagorean Triples. In this geometry lesson, 10th graders explore methods of finding Pythagorean Tripl... | 4 | [
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Comparing two different methods
August 10th 2010, 08:57 PM
mortalcyrax
Comparing two different methods
Two different means of assessing the students have been suggested. First using a normal distribution and secondly using fixed percentages for each rating.
Using the normal distribution
A - > 2a
B -... | 4 | [
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Connections
Connections
From Manifold Atlas
The user responsible for this page is Jost Eschenburg. No other user may edit this page at present.
This page has not been refereed. The information given here might be incomplete or provisional.
1 Introduction
How can we differentiate a section $s$$ewcommand{\Z}{\mathb... | 4 | [
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F
More Factor-Label Method Practice Problems:
1. Use conversion factors from the SI system to do the following conversions:
a. 2.4 meters to centimeters
b. 65.5 centigrams to milligrams
c. 5 liters to cubic decimeters
d. The density of a substance is 2.7 g/cm^3. What is the density of the substance in kilograms ... | 4 | [
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Modelling and simulation of robot system using Matlab and Simulink.
Link/Page Citation
1. INTRODUCTION
Robotic systems has already become standard and very useful devices in modern indus... | 4 | [
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Please help with solving trig equations!
(2) $\sin 2x=-\sin x$ $\sin 2x+\sin x$ Double angle identity: $\sin 2x = 2\sin x \cos x$ $2\sin x \cos x + \sin x=0$ $\sin x(2\cos x+1)=0$ $\boxed{\sin x = 0} \ \ or \ \ 2\cos x+1=0$ $2\cos x=-1$ $\
boxed{\cos x = -\frac{1}{2}}$ $\sin x=0 \ \ at \ \ \left\{0, \pi\right\}$ $\cos ... | 4 | [
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Rational Expression
October 22nd 2008, 04:41 AM
magentarita
Rational Expression
Determine whether the given expressions are proper or improper. If improper, rewrite it as the sum of a polynomial and a proper rational expression.
(1) (5x + 2)/(x^3 - 1)
(2) 2x(x^2 + 4)/(x^2 + 1)
October 23rd 2008, 07:50... | 4 | [
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0... | 5,444 | 5444 | |
MathGroup Archive: June 2000 [00218]
[Date Index] [Thread Index] [Author Index]
Re: System of lorenz equations
• To: mathgroup at smc.vnet.net
• Subject: [mg23933] Re: System of lorenz equations
• From: Jens-Peer Kuska <kuska at infor... | 4 | [
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Combinations/Probability
January 5th 2011, 10:28 AM #1
Newbie
Joined
Jun 2009
Posts
15
Combinations/Probability
A rental car service facility has 10 foreign cars and 15 domestic cars. Choose 6 cars at random. Let D_i={exactly i of 6 cars chosen are domestic}, i=0,1,2,...6. What is the probability of at
... | 4 | [
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IntroductionBackgroundRelated WorkPresented WorkProposed Movement Energy Harvesting TechniquesMovement Energy Harvesting Employing an Inertial MassPrinciples of Operation (Inertial Mass)Movement Energy Harvesting via a Tethered TransducerPrinciples of Operation (Tethered)Methods to Determine the Magnitude of Energy in ... | 4 | [
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0.00946044921875,
0... | 5,447 | 5447 | |
Fate of Missing Socks
It has been argued that the act of doing laundry followed the discovery of clothing by only a few weeks. While this fact has been regarded to be fantastically trivial, one can not ignore the enigmas
that the act of doing laundry has created. This is especially true in the age of high speed washers... | 4 | [
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Positive integers that are differences of squares
July 2nd 2011, 01:57 PM #1
Junior Member
Joined
Feb 2010
Posts
45
Positive integers that are differences of squares
Find all positive integers which can be written as the difference of squares.
This is what I have so far: Let $n$ be a positive intege... | 4 | [
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0.069335937... | 5,449 | 5449 | |
Digging Up 3-Digit Cube Roots
Over in the Mental Gym, you can learn how to mentally work out the cube root of any perfect cube up to 1,000,000!
It's time to take that feat to the next level, so in today's post, you'll learn how to mentally work out the cube roots of perfect cubes between 1 million and 1 billion!
BAS... | 5 | [
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... | 5,450 | 5450 | |
e Pro
Option maxfun for Numerical Solution of ODE Initial Value Problems
Description
• Invoking the dsolve function with the numeric option and (default), or output=operator causes dsolve to return procedure(s) to numerically solve the input ODE system.
• Prior to returning this procedure, the input system is c... | 5 | [
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MathGroup Archive: October 2002 [00213]
[Date Index] [Thread Index] [Author Index]
Re: Operating on every k-th element of list?
• To: mathgroup at smc.vnet.net
• Subject: [mg37100] Re: [mg37080] Operating on every k-th element of list?
... | 5 | [
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Department of Chemistry, Geosciences and Environmental Sciences
Exam 2-A
Chemisty 1084: Section 010 Spring 200... | 5 | [
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shell method #2
October 24th 2009, 09:39 PM #1
Junior Member
Joined
Oct 2009
Posts
34
shell method #2
Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified line.
y=x^2
x=y^2
about the line x= -1
I'm having trouble deciphering on wh... | 5 | [
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IntroductionFundamentals of Thin Film ReflectionModel ExtensionMeasurements and ResultsMeasured SamplesAlgorithm, Conditions and Computational TimesResultsConclusion and OutlookConflicts of InterestReferencesFigures and Table
Sensors Sensors 1424-8220 Molecular Diversity Preservation International (MDPI) 10.3390/s13111... | 4 | [
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Sequential Fuzzy Diagnosis Method for Motor Roller Bearing in Variable Operating Conditions Based on Vibration Analysis
Open Access This article is
• freely available
• re-usable
Article
Sequential Fuzzy Diagnosis Method for Motor Roller Bearing in Variable Operating Conditions Based on Vibration Analysis
^2
S... | 4 | [
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Understanding the Link Between Volatility and Compound Returns
Understanding the Link Between Volatility and Compound Returns
It is clear from looking at the current landscape that volatility is rapidly becoming a key focus for asset management. Witness the birth of “low-volatility” ETFs and the popularity of
minimum... | 4 | [
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-0.03759765625,
0.040771484375,
0.1357421875,
0.0400390625,
0.0235595703125,
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0.01312255859375,
0.036865234375,
0.027099609375,
-0.06787109375,
0.04833984375,
0.06... | 5,457 | 5457 | |
Function ASIN, ACOS, ATAN
Syntax:
asin number => radians
acos number => radians
atan number1 &optional number2 => radians
Arguments and Values:
number---a number.
number1---a number if number2 is not supplied, or a real if number2 is supplied.
number2---a real.
radians---a number (of radians).
Descri... | 4 | [
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0.04931640625,
-0.0220947265625,
-0.03369140625,
-0.034912109375,
-0.036621... | 5,458 | 5458 | |
Introduction to Integrals
Approximate the area between the curve of y = x ^2 and the x - axis from x = 0 to x = 1 :
Figure %: Area bounded by a curve
The method to be used in this section to solve this problem is Riemann sums, which involves subdividing the region into rectangles of equal width and adding up the area... | 4 | [
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0.0264892... | 5,459 | 5459 | |
Regarding De Moivre’s Theorem
March 10th 2009, 08:31 AM #1
Newbie
Joined
Mar 2009
Posts
6
Regarding De Moivre’s Theorem
Can somebody help me to figure out the answer of that question?
Thanks in advanced...Really appreciate if have any help...
By Using De Moivre’s Theorem, show that :
(... | 5 | [
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0.0625,
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0.0301513671875,
-0.01483154296875,
-0.08837890625,
-0.03857421875,
... | 5,460 | 5460 | |
How much?
August 30th 2006, 09:46 AM #1
Newbie
Joined
Aug 2006
Posts
12
Hi...
In a triangle ABC are AB= 7 cm, BC= 4cm and angle BAC = 32 degrees...
How much can you increase angle BAC, while AB and BC are unchanged?
Can you guys help me on this?
Would be appreciated!
Neffets...:P
... | 4 | [
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-0.00044059753... | 5,461 | 5461 | |
Fundamentals of Differential Equations
1. Introduction
1.1 Background
1.2 Solutions and Initial Value Problems
1.3 Direction Fields
1.4 The Approximation Method of Euler
Chapter Summary
Technical Writing Exercises
Group Projects for Chapter 1
A. Taylor Series Method
B. Picard's Method
C. The Phase Line
2. Fi... | 4 | [
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0.01025390625,
-0.0107421... | 5,462 | 5462 | |
umber
2 Complex numbers
2.6 Division of complex numbers
The second of the conjugate–modulus properties enables us to find reciprocals of complex numbers and to divide one complex number by another, as shown in the next example. As for real numbers, we
cannot find a reciprocal of zero, nor divide any complex number by... | 5 | [
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0.06494140625,
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-0.0... | 5,463 | 5463 | |
Triple Integral
Triple integrals are defined for functions of three variables as the limit of a sum, just as the single and double integrals are defined respectively for functions of one and two variables. The Box
interval B
B = { x, y, z | a = x = b, c = y = d, and p = z = q} where the function f(x, y, z) is defined ... | 4 | [
0.0283203125,
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0.05078125,
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-0.03759765625... | 5,464 | 5464 | |
debuging problems
i have written a mips program to verify if a given input is a magic square,
a magic square is a n*n matrix whose values are from 1..n^2, and each
row/column diagonal gives the same sum, this sum is know as the magic
number.
All my program does is go through and sum each of the rows then each of the
... | 4 | [
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0.025... | 5,465 | 5465 | |
Quick Review 2-4
Unit 2 - Objective 4 - Higher Derivatives
The derivative of the function is the 1st derivative.
The derivative of the 1st derivative is the 2nd derivative.
The derivative of the 2nd derivative is the 3rd derivative a... | 4 | [
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... | 5,466 | 5466 | |
differential equation xy"+y'-mxy=0
Member
Registered: 2005-08-04
Posts: 394
Re: differential equation xy"+y'-mxy=0
Member
Registered: 2006-02-23
Posts: 2
differential equation xy"+y'-mxy=0
Does anybody could help me with the following equation:
xy"+y'-mxy=0
or
my=y"+y/x
It comes from the Lap... | 4 | [
-0.10107421875,
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0.02734375,
-... | 5,467 | 5467 | |
Revision:OCR Core - The sine and cosine rules - The Student Room
•
• Revision:OCR Core - The sine and cosine rules
TSR Wiki > Study Help > Subjects and Revision > Revision Notes > Mathematics > OCR Core - The sine and cosine rules
4. The sine and cosine rules
In trigonometry the convention is to use lower-case ... | 4 | [
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0.01470947265625... | 5,468 | 5468 | |
Extension fields
November 15th 2011, 10:52 AM
poorna
Extension fields
Hello,
I have been asked to prove that the cardinality of any algebraic extension of a finite field k is the same as that of Z(the integers)
And if k is not finite, the cardinality of any algebraic extension is the same as that of the ... | 5 | [
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0.0053... | 5,469 | 5469 | |
How do you show partial derivatives exist at a point?
October 17th 2012, 10:10 PM #1
Newbie
Joined
Oct 2012
From
US
Posts
3
How do you show partial derivatives exist at a point?
I need to show that the partial derivatives of f(x, y) = (xy)^1/3 exists at the origin, but I don't know how to go about it... | 4 | [
0.03662109375,
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0.01... | 5,470 | 5470 | |
IntroductionExperimental SectionResults and DiscussionConclusionsReferences and NotesFigures
Sensors Sensors 1424-8220 Molecular Diversity Preservation International (MDPI) 10.3390/s110100757 sensors-11-00757 Article Fringe Capacitance Correction for a Coaxial Soil Cell PelletierMathew G.^1*
VieraJoseph A.^2 SchwartzRo... | 4 | [
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... | 5,471 | 5471 | |
Treatise On Analysis Vol-Ii
11 THE SPACES L1 AND L2 167
10. Suppose that the measure ju. is bounded and that /x(X) = 1. Let u be a £i-measur-
able mapping of X into itself which leaves invariant the measure p, (Section 13.9,
Problem 24). Then for every function/e J5f1(X, /x) the class U -f=f° u depends only
o... | 4 | [
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0.004669189453125... | 5,472 | 5472 | |
A DC-DC Converter Efficiency Model for System Level Analysis in Ultra Low Power Applications
Open Access This article is
• freely available
• re-usable
Review
A DC-DC Converter Efficiency Model for System Level Analysis in Ultra Low Power Applications
The Charles L. Brown Department of Electrical and Computer E... | 4 | [
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Technical Mathematics 2
Unit 5 - Objective 2 - Basic Operations with Complex Numbers
Quick Review
We can add, subtract, multiply, or divide complex numbers.
... | 4 | [
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0.1816... | 5,474 | 5474 | |
Math Practice Problems
MathScore EduFighter is one of the best math games on the Internet today. You can start playing for free!
Mixture Word Problems - Sample Math Practice Problems
The math problems below can be generated by MathScore.com, a math practice program for schools and individual families. References ... | 4 | [
0.0093994140625,
0.037841796875,
0.029296875,
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0.046875,
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-0.010986328125,
0.01068115234375,
... | 5,475 | 5475 | |
Sums of Powers in Discrete Mathematics: Archimedes Sums Squares in the Sand
Introduction
Figure 1. Portrayal of the mathematician Archimedes (3rd century BCE) by Italian painter Domenico Fetti (c. 1589-1623) (Source: Wikimedia Commons)
In the third century BCE Archimedes made astonishing discoveries of precise areas ... | 4 | [
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0.07... | 5,476 | 5476 | |
Estimation,Confidence intervals and tests
April 20th 2009, 10:17 AM #1
Junior Member
Joined
Feb 2009
Posts
40
Can anyone help me to solve the following problem?
The 25 children in a class each roll a fair die 30 times and record the number of sixes they obtain. Find an estimate of the probability tha... | 4 | [
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0.... | 5,477 | 5477 | |
Computing Power and Sample Size for Informational Odds Ratio
Open Access This article is
• freely available
• re-usable
Communication
Computing Power and Sample Size for Informational Odds Ratio ^†
Center for Health Disparities Research and Department of Public Health, Brody School of Medicine, Greenville, NC ... | 5 | [
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0.0625,
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tion
9. Parametric Design
Overview
This chapter covers the use of MechanicalSystems' parametric design synthesis functions, SetCouple and SolveCouple. These functions allow the user to specify one or more geometric conditions that are
to be satisfied, along with the names of parameters that are to be varied in an att... | 5 | [
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0.019... | 5,479 | 5479 | |
Differential Equations: Theory and Applications
This textbook is intended as a comprehensive introduction to ordinary differential equations for graduate students. It is designed to be flexible enough to suit the needs of three different kinds of
courses: those with a theoretical focus, those that emphasize application... | 4 | [
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0.0094604492187... | 5,480 | 5480 | |
Transmission
Transmission line model
Updated... | 4 | [
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0.01171875,
-0.06054... | 5,481 | 5481 | |
Exam tomorrow
Solve the equation. Show me step by step please 5*x^1/3=35
you want to solve for x, so we have to start to leave x alone on one side. since the 5 is multiplying the x^(1/3), you want to divide both sides by x. now we're left with: x^(1/3)=7 now to get rid of
the "1/3", you would take the "x^(1/3)" and ra... | 4 | [
0.00201416015625,
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0.06982421875,
0.08837890625,
0.036865234375,
0.029296875,
-0.1376953125,
0.04199218... | 5,482 | 5482 | |
domain and range of inverse trig functions
October 14th 2009, 02:47 AM
differentiate
domain and range of inverse trig functions
hey, can someone tell me how to do these? like explain it and all
Find the domain and range of:
a) $y = 2tan^{-1}x$
do for y = 2tanx.. the domain would be -pi/2 < x < pi/... | 5 | [
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0.09423828125,
0.0108642578125,
0.0595703125,
0.00179290771484375,
0.006195068359375,... | 5,483 | 5483 | |
Integers sequence
March 12th 2010, 06:48 AM
atreyyu
Integers sequence
Show that the sequence of positive integers given by $a_{2n} = 3a_n -1, \ \ a_{2n+1}=3a_n +1$ is strictly increasing.
I have written down a reductio-ad-absurdum-proof, but it's based largely on tedious reduction of indices in $a$ and event... | 4 | [
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0.0235595703125,
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-0.0281982421875,
-0.048095703... | 5,484 | 5484 | |
trigonometry proof
Prove that cos (2π/13)+ cos (6π/13) + cos (8π/13)= (sqrt(13)-1)/4
Outline proof: For $0\leqslant k\leqslant 12$, let $A_k$ denote the angle $2k\pi/13$. The points $(\cos A_k,\sin A_k)$ are equally spaced around the unit circle, so their centre of mass is at the
origin, and it follows that $\sum_{k=0... | 5 | [
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0.0275... | 5,485 | 5485 | |
Are there good inequalities on the norm?
up vote 2 down vote favorite
1
It's well known that in a Hilbert space, good inequalities exist concerning the norm due to the existence of inner product.Now let X be a general Banach algebra, are there good inequalities
concerning the norm? To be precise, let's consider an ex... | 5 | [
-0.046875,
-0.06201171875,
-0.0654296875,
-0.020263671875,
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0.01519775390625,
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0.0849609375,
0.0693359375,
-0.037353515625,
... | 5,486 | 5486 | |
Sum Rule Lesson Plans & Worksheets | Lesson Planet
Sum Rule Teacher Resources
Find Sum Rule educational ideas and activities
Showing 1 - 20 of 57 resources
Twelfth graders explore the concept of limits. In this calculus lesson, 12th graders investigate the limit rules for both finite and infinite limits through the... | 4 | [
-0.05517578125,
0.037109375,
-0.0106201171875,
-0.052001953125,
-0.0634765625,
-0.07568359375,
-0.0390625,
0.056640625,
0.029052734375,
0.0191650390625,
-0.000644683837890625,
-0.023193359375,
0.046142578125,
0.12158203125,
-0.022216796875,
-0.04248046875,
-0.038818359375,
0.028320... | 5,487 | 5487 | |
temperature PDE
February 9th 2009, 01:44 PM
PvtBillPilgrim
temperature PDE
Can someone help me with this?
An infinitely long plate of width L has its two parallel sides maintained at temperature zero and its other side at constant temperature T. What is the rate of change?
I have that Laplace's equatio... | 5 | [
-0.043212890625,
0.0262451171875,
0.0478515625,
-0.00787353515625,
0.054931640625,
0.0361328125,
-0.0849609375,
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-0.06884765625,
-0.01092529296875,
0.08740234375,
-0.0400390625,
0.00811767578125,
0.04052734375,
0.05908203125,
-0.0224609375,
-0.07470703125,
-0.1445312... | 5,488 | 5488 | |
Math Help
March 5th 2008, 03:49 PM #1
Member
Joined
Jul 2007
Posts
75
(secx+cscx)/(1+tanx)=cscx
I put the entire thing in terms of sine and cosine, but I keep getting stuck. Please and thank you!
On the left, replacing everything with sine and cosine, gives:
$\frac {\frac{1}{cos x} + \frac... | 4 | [
-0.0927734375,
0.039306640625,
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0.03759765625,
-0.09130859375,
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0.056640625,
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0.009765625,
0.029052734375,
0.0113525390625,
-0.028564453125,
-0.00946044921875,
0.057617187... | 5,489 | 5489 | |
proving that an interval I = [a,b] has length |b-a|
December 6th 2010, 12:47 PM #1
Member
Joined
Aug 2008
Posts
249
proving that an interval I = [a,b] has length |b-a|
prove that an interval I = [a,b] has length |b-a|.
so this is an example in my book. So for the proof they use the indicator functio... | 4 | [
-0.004425048828125,
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0.0036163330078125,
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0.026611328125,
0.0260009765625,
0.041748046875,
-0.0732421875,
-0.1142578125,
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0.103515625,
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0.0213623046875,
0.007171630859375,
0.005859375,
-0.0... | 5,490 | 5490 | |
tion
Derivation of Coordinate Transformations
To derive an expression for Lorentz Contraction, begin with the following postulates:
• The laws of physics are the same in all inertial frames of reference
• The speed has the same value, c, in all inertial frames
Consider two frames, one which will be assumed to be... | 4 | [
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0.0283203125,
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-0.042236328125,
0.017578125,
0.01202392578125,
0.09375,
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0.038818359375,
-0.042724609375,
0.024658203125,
-0.046875,
0.130859375,
-0.... | 5,491 | 5491 | |
Cryptography
Suppose we wish to broadcast a stream to a set of users securely. How can we achieve integrity? We cannot use MAC’s, otherwise the users could forge packets to each other. We cannot sign the entire
stream: this solution is vulnerable to packet loss, and also the whole stream would have to be buffered for v... | 4 | [
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0.09765625,
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-0.0137939453125,
-0.049560546875,
0.04541015625,
0.0466... | 5,492 | 5492 | |
Discovering the Mathematics, Continued
Navigation Panel:
Go backward to Discovering the Mathematics Behind the Game
Go up to The Tower of Hanoi
Go forward to The Answer
Switch to graphical version (better pictures & formulas)
Go to University of Toronto Mathematics Network Home Page
Discovering the Mathematics, Conti... | 5 | [
0.0189208984375,
-0.046142578125,
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0.03955078125,
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0.0234375,
-0.041259765625,
-0.05224... | 5,493 | 5493 | |
Annuity-immediate
October 6th 2010, 05:04 PM #1
Junior Member
Joined
Nov 2008
Posts
53
Annuity-immediate
Here is the question:
10000 can be invested under two options:
Option 1: Deposit the 10000 into a fund earning an effective annual rate of i
Option 2: Purchase an annuity-immediate with... | 5 | [
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0.061767578125,
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0.06396484375,
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0.0250244140625,
-0.07177734375,
-0.0317382... | 5,494 | 5494 | |
Calculus Lesson Plans & Worksheets :: 61 - 80
Calculus Teacher Resources
Find Calculus educational ideas and activities
Showing 61 - 80 of 1,610 resources
In this A.P. Calculus pre-requisites worksheet, students solve ten multiple-choice and ten free-response questions. Many of these questions cover trigonometric f... | 4 | [
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0.039794921875,
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0.046630859375,
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0.083984375,
0.0301513671875,
-0.0181884765625,
-0.04638671875,
-0... | 5,495 | 5495 | |
Number of solutions : ax+by=n
April 22nd 2011, 11:38 AM #1
Newbie
Joined
Apr 2011
Posts
3
Number of solutions : ax+by=n
Hi,
I want to know the number of solutions of the diophantine equation
ax+by=n
where a,x,b,y,n are positive and a,b,n are given.
The first thing I do is checking whe... | 5 | [
-0.045654296875,
0.0025634765625,
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0.03857421875,
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0.0810546875,
0.004608154296875,
-0.0... | 5,496 | 5496 | |
Numerical Semigroups
I first became interested in this wonderful book because of its title. It seemed to connect with a problem I’m working on — briefly, find all binary operations # (“generalized addition”) on N (the
set of natural numbers) such that both # and the induced binary operation (“generalized multiplication... | 4 | [
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0.06591796875,
0.0279541015625,
-0.037841796875,
0.061523... | 5,497 | 5497 | |
n-th percentile
June 7th 2010, 09:58 AM #1
Junior Member
Joined
Apr 2010
Posts
36
n-th percentile
I need to find 10th percentile of random variable X with PDF defined with:
$<br /> f(x) = \left\{\begin{array}{cc}c(x-x^3)&0< x < 1\\0&x\le 0 \vee x\ge 1 \end{array}\right.<br />$
where $c\in \math... | 5 | [
-0.025146484375,
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0.040283203125,
0.11328125,
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0.004486083984375,
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0.040771484375,
0.039306640625,
-0.033935546875,
-0.036865234375,
0.052490234375,
-0.024658... | 5,498 | 5498 | |
Normal Derivative
September 25th 2008, 03:21 PM #1
Member
Joined
May 2008
Posts
138
Normal Derivative
Just can't seem to get this algebra down
find $f'(a)$
$f(x) = \frac{x^2+1}{x-3}$
$\lim_{x \to a} \frac{f(x)-f(a)}{x-a}$= $\lim_{x \to a} \frac{\frac{x^2+1}{x-3} - \frac{a^2+1}{a-3}}{x-a}$... | 4 | [
-0.031982421875,
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0.048828125,
0.047607421875,
0.1435546875,
-0.08154296875,
0.039306640625,
0.00390625,
0.029296875,
-0.0302734375,
-0.055419921875,
0.006134033203125,... | 5,499 | 5499 |