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4. Có thể và sẵn sàng đi làm
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... constants A and B are determined by substitution into the differential equation
and, as expected, are found to be -2 and respectively. Then
x(t) = -2 +
+ + +
and the constants and are determined ... is
x(t) = -2 +
+ +
A comparison between this methodand the classical method, as applied to
Example 3.2, may be profitable. In the classical method for solution of differential
equations we ... x ‘(0) = 0
The transform method yields
2
= + + 1)
Factoring and expanding into partial fractions,
2
A B
c
(s + + 2j) +
s + 2j
2j
(3.13)
Multiplying Eq. (3.13) by + and setting = -1 yield
A=
2...
... Trinh
and Nguyen Du wards and 0.545 kg/person/day in Me Tri, Kim Giang, Dong Anh and Nghia Tan
wards where are far from the city center.
Keywords: solid waste, waste quantity and quality measurement. ... VNU Journal of Science, Natural Sciences and Technology 25 (2009) 145-151
145
Methodology for the waste quantity and quality measurement.
Case study: 6 sites in Hanoi
Ngo Kim Chi*, ... 5) Encouraging and
reminding citizens to cooperate and weight
waste every day. It should be improved source
separation in the two pilot wards Phan Chu
Trinh and Nguyen Du and its expansion...
... with BamHI and t hen subjected to Southern blot
analysis using
32
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Materials and methods. (C) Tissue distribution o f mRNAs fo r AQPap
and AQPap-like ... expected to produce a 7.7-kb band for
wAQPap-1 and wAQPap-3, 5.6-kb signal for wAQPap-2,
and 3.5-kb signal for AQPap, respectively. The signal
intensity of the 7.7-kb band was around threefold greater
than ... cotransfected with pRL-SV40 plasmid and the
indicated constructs, and in cubated in the presence (solid bar) or absence (open bar) o f insulin as described in t he Materials and methods. T welve
hours later,...
... in the
grammar, and with enough examples we can pin-
point the grammar rules causing these problems.
We call our system Egad, which stands for Erro-
neous Generation Analysisand Detection.
∗
This ... corpus. Our approach takes this idea and fur-
ther applies it to generation. We were also inspired
by the work of Dickinson and Lee (2008), whose
“variation n-gram method models the likelihood
a ... (Pollard and Sag, 1994) framework,
and use Minimal Recursion Semantics (MRS)
(Copestake et al., 2005) for their semantic rep-
resentations. The Tanaka Corpus (Tanaka, 2001)
provides us with English and...
... tool.
Acquisition standards and criteria for Tier I and Tier III properties differ as
much as the participants in these two markets. The level of due diligence,
analysis techniques, appraisal standards, and ... market rates and terms, the borrower
is saying that the equity is worth $200,000 to him. Thus, he has examined the
present and anticipated cash flows in light of his chosen discount rate and,
after ... lower and left rear edges and use the lower rear left corner
as the origin to visualize it.)
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... DISCRETE-SIGNAL
ANALYSIS AND DESIGN
WILLIAM E. SABIN
A JOHN WILEY & SONS, INC., PUBLICATION
CONTENTS
Preface xi
Introduction 1
Goals of the Book
Discrete Signals
Advantages of Discrete-Signal Analysisand ... the Time and Frequency Domains
Two-Sided Time and Frequency
Discrete Fourier Transform
Inverse Discrete Fourier Transform
vii
This book is dedicated to
my wife, Ellen; our sons, Paul and James;
our ... the Book
Discrete Signals
Advantages of Discrete-Signal Analysisand Design
DFT and IDFT
Mathcad Program
MATLAB and Less Expensive Approaches
Multisim Program from National Instruments Co.
Mathtype...
... ANALYSISAND DESIGN
In this book, we will get a better understanding of discrete-time and
discrete-frequency signal processing, which is rapidly becoming an impor-
tant modern way to design and ... that are difịcult to work with using
the traditional and laborious mathematical pencil -and- paper methods of
former eras. This is especially true of certain nonlinear circuits and sys-
tems that ... mathematical back-
ground and understanding are unclear. Before we can design something
we have to look beyond the diagrams, parts lists, and formula handbooks.
The reliance on intuitive methods, especially,...
... SINE, COSINE, AND θ 35
the given signal. In practice we might not know the waveform ahead of
time and we would be asked to examine the phasor amplitudes and phases
and use Fig. 2-2 to determine ... a
third out-of-band frequency to see the degradation of the in-band two-tone
signal. This can be very illuminating and very practical.
Example 2-1: Nonlinear Ampliịer Distortion and Square
Law ... not perfectly linear.
We will use the DFT [Eq. (1-2)] to get the spectrum and IDFT (Eq. 1-8)
34 DISCRETE-SIGNAL ANALYSISAND DESIGN
x(n) :=
7⋅cos 2⋅π⋅ ⋅4 + 60⋅
n
N
π
180
N := 16 n := 0,.01 N −...
... 2·π·
n
N–1
.
Hanning
Figure 4-3 (continued )
SMOOTHING AND WINDOWING 67
retain a causal (n and k from 0 to N −1) result, we must delay and
terminate the sequence and use smoothing and windowing sufịciently
that aliasing ... sharp edges of a band ịlter are
softened and rounded to obtain beneịts such as improved group delay
near the band edges. This method is also known as transition sampling
[Oppenheim and Schafer, 1975, ... spectrum.
SMOOTHING REFERENCES
Jenkins, G.M., and D.G. Watts, 1968, Spectral Analysisand Its Applications,
Holden-Day, San Francisco, CA.
Oppenheim, A.V., and R.W. Schafer, 1975, Digital Signal Processing,
McGraw-Hill,...
... previously and
mentioned here again for emphasis.
Discrete-Signal Analysisand Design, By William E. Sabin
Copyright 2008 John Wiley & Sons, Inc.
77
76 DISCRETE-SIGNAL ANALYSISAND DESIGN
WINDOWING ... the phasors at 108 and 20 to get the positive
cosine at 20, and adding the 100 and 28 phasors to get the negative
cosine term at 28. See Fig. 2-2a to conịrm these results, and note the
agreement ... The (n) and (k ) values are
integers from 0 to N −1. The X (k) values to be multiplied are phasors that
have amplitude, frequency, and phase attributes, and the x (n) values have
amplitude and time...