define angle sum property of a triangle
báo cáo hóa học:" Research Article Note on the Persistent Property of a Discrete Lotka-Volterra Competitive System with Delays and Feedback Controls" pptx
Ngày tải lên :
21/06/2014, 11:20
... exponentially for 2 ≤ i ≤ N, and u
i
t → X
∗
, where X
∗
is a certain solution of
a logistic equation. Teng 8 and Ahmad and Stamova 9 also studied the coexistence on a
nonautonomous Lotka-Volterra ... guarantee
that all the species are permanent. It is shown that these conditions are weaker than those of Liao
et al. 2008.
1. Introduction
Traditional Lotka-Volterra competitive systems have been ... 4 Advances in Difference Equations
2. Proof of Theorem 1.2
The following lemma can be found in 10.
Lemma 2.1. Assume that A& gt;0 and y0 > 0, and further suppose that
(1)
y
n 1
≤ Ay
n
...
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- 351
- 0
Báo cáo khoa học: Zinc-binding property of the major yolk protein in the sea urchin ) implications of its role as a zinc transporter for gametogenesis ppt
Ngày tải lên :
16/03/2014, 05:20
... weight)
)1
at stage 1, which was less
than half of that in ovary at stage 1, and remained at
a similar value to stage 4. Testes at stage 2 were not
analyzed because of a lack of samples. We calculated
the ... MYP.
Statistical analysis
Data were expressed as the mean ± SEM. Statistical analy-
sis was performed using instat software (GraphPad Soft-
ware). The normality of the distribution of data was
evaluated ... blot analysis
appeared rather broad, probably because large
amounts of unlabeled CFMYP and EGMYP naturally
present in the gonads formed broad bands and affected
the shape of the bands of the labeled...
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- 442
- 0
Báo cáo hóa học: "Frequency and 2D Angle Estimation Based on a Sparse Uniform Array of Electromagnetic Vector Sensors" pptx
Ngày tải lên :
22/06/2014, 23:20
... fundamental problem
in estimation theory and its applications include r adar, ar-
ray signal processing, and frequency synchronization. For
scalar sensor array, a number of ESPRIT-based angle and ... X
2
and
Y
2
has a spatial invariance along the y-axis and can yield es-
timates of the direction cosines
{v
k
, k = 1, , K}. This third
matrix pencil X
1
and Y
3
has a temporal invariance and can
yield ... signals may coexist. Wong [10]
has showed that the vector cross-product DOA estimator re-
mains fully applicable for a pair of dipole triad and loop triad
spatially displaced by an arbitrary and...
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- 0
Alexey a zaslavsky, one property of the jerabek hyperbola and its corollaries
Ngày tải lên :
18/07/2014, 22:48
... A
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Fig. ... B
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P
Fig. ... Jerabek hyperbola.
Here follow some corollaries of this fact.
56 ALEXEY A. ZASLAVSKY
A B
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Fig....
- 4
- 347
- 1
The Design and Implementation of a Log-Structured File System
Ngày tải lên :
12/09/2012, 15:05
... log as the most up to date ‘‘truth’’ about
the state of the data on disk. The main difference is that
database systems do not use the log as the final repository
for data: a separate data area is ... purpose.
The separate data area of these database systems means
that they do not need the segment cleaning mechanisms of
the Sprite LFS to reclaim log space. The space occupied
by the log in a database system ... The bandwidth of each of the five phases is
shown separately. Sprite LFS has a higher write bandwidth and
the same read bandwidth as SunOS with the exception of sequen-
tial reading of a file that...
- 15
- 1.4K
- 0
The Duality of Memory and Communication in the Implementation of a Multiprocessor Operating System
Ngày tải lên :
12/09/2012, 15:05
... in nature to a data manager which fails to free
data, but is easier to detect and prevent.
ã Data manager changes data. A malicious data manager may change the value of its data on each cache
refresh. ... data. It is usually made
in response to a pager_data_request call made to the data manager by the kernel.
Typical data managers will only provide data upon demand (when processing pager_data_request ... it
initiates a cache replacement.
A data manager may restrict the use of cached data by issuing a pager_data_lock request, specifying the types of
access (any combination of read, write, and execute)...
- 23
- 1.3K
- 1
List the components of a radio system
Ngày tải lên :
13/09/2012, 10:52
... 25
Signal Strength (continued)
19
Multiple Access (continued)
ã
Code Division Multiple Access (CDMA) (continued)
Advantages
ã
Can carry up to three times the amount of data as TDMA
ã
Transmissions ... communication today
ã
Except for broadcast radio and television
ã
Half-duplex transmission
Sends data in both directions
ã
But only one way at a time
Used in consumer devices such as citizens band ... filter
Either passes or rejects a signal based on frequency
ã
Types of filters
Low-pass filter
High-pass filter
Bandpass filter
7
Amplifiers
ã
Increase the amplitude of an RF signal
ã
RF signals tend...
- 30
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- 0
Cambridge.University.Press.Africans.The.History.of.a.Continent.Aug.2007.pdf
Ngày tải lên :
21/09/2012, 10:39
... concrete rather than abstract; each moral
quality was personified as a deity; no truly historical sense emerged; learning
consisted of a gigantic catalogue of names and attributes; and the law was not
codified. ... lineages of
mitochondrial DNA exist among the San (‘Bushmen’) of southern Africa and
the Biaka Pygmies of the modern Central African Republic. About 100,000 years
ago, some of these anatomically ... 20,000 years
ago, appeared at that date also in southern Africa, spread into western and
northern Africa during the next 10,000 years, and thereafter became ubiquitous.
Arrow-heads, appearing about...
- 386
- 1.2K
- 4