current date and time in php w3schools
Date and Time Manipulation
Ngày tải lên :
05/10/2013, 08:51
... only increases when the date
interval spans months or years.
Date in Days
The following script shows one way to make date and time calculations much easier.
Because UNIX and Linux calculate time ... like to get those routine notices by page during the day and by e-mail at
other times.
The following script determines whether the current day and hour are within a certain
time frame that you ... 's/0*//'`
year= `date +'%Y'`
22
CHAPTER 3
■
DATE AND TIME MANIPULATION
Alternatives for Finding the Date in Seconds
There are two other ways to calculate the number of seconds since the epoch....
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CURRENT FRONTIERS AND PERSPECTIVES IN CELL BIOLOGY doc
Ngày tải lên :
28/03/2014, 10:20
... as integrins (e.g. endothelial JAM-A with integrin LFA-1 in
leukocytes and integrin ανβ3 in endothelial cells; endothelial JAM-B with integrin VLA4 in
Current Frontiers and Perspectives in ... present in proteins concentrated in cholesterol rich
microdomains and involved in membrane apposition and fusion events. Occludin and
tricellulin carboxyl cytoplasmic tales are long and share ... protein-protein interaction. JAMs and LSR do not constitute tight
junction strands and instead act as landmarks. Thus while LSR defines cell corners for
Current Frontiers and Perspectives in...
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Current Trends and Challenges in RFID Part 1 doc
Ngày tải lên :
19/06/2014, 19:20
...
Similarly,
S
12
and S
22
can be obtained by measuring the incident, the reflected and the
transmitted signals at the output when the input is terminated in
Z
0
. Since the input is
terminated by ... linear, the total voltage at any point in the system is the sum of incident and
reflected voltages. The net current is superposition of incident and reflected currents.
However, since the currents ... the scattering parameters (or just S-parameters) are
employed. The input and output variables in S-parameters are based on incident and
reflected voltage waves instead of voltages and currents....
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Current Trends and Challenges in RFID Part 2 pptx
Ngày tải lên :
19/06/2014, 19:20
... increased by negative voltage gain
between input and output. However, since the input impedance of the cascode device M
2
is
capacitive, the voltage gain is high in low frequency and low in ... = v
GS
- V
t
, the current becomes independent of v
DS
.
Current Trends and Challenges in RFID
32
a. Both LO and input signals are balanced, providing both LO and input rejection at the ... thus, in fact
both resistance and inductance are being added to the circuit. Therefore, it is valuable to
investigate the effect of both inductor and resistor as Z
s
.
4.4 Input impedance and...
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Current Trends and Challenges in RFID Part 3 docx
Ngày tải lên :
19/06/2014, 19:20
...
transitory current to flow into Q
1
leading the system to desired operating point. At same
time, C
START
is charged toward V
IN
reducing the V
sg
of M
START
and, consequently, turning it
off. ... years,
integrated circuits are being fabricated with large densities and endowed with intelligence.
The reliability of those systems has been increasing and the costs are lowering. The
interaction ... component, and gradually, decrease towards the center.
The temperature effects are minimized in a similar way as the stress gradient: by using low
linear temperature coefficient, by using minimal lines...
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Current Trends and Challenges in RFID Part 4 pdf
Ngày tải lên :
19/06/2014, 19:20
... behaviour
uponbiological tissues in a radio-frequency power transfer link for a cortical visual
implant. In
Proc. IEEE Int. Conf. Engineering in Medicine and Biology. pp. 2499-2502.
[32] ... other hand, it is encumbering and not well-suited
Current Trends and Challenges in RFID
80
2. Minimum emitter area for matched transistors, otherwise there will be a degradation in
the current ... antenna with a single feed for orthogonal dual-band
operation and its and (b) VSWR plots (Chen & Wong 1996)
Fig. 12. Aperture coupled RMSA with an inclined slot
An interesting feature...
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Current Trends and Challenges in RFID Part 5 docx
Ngày tải lên :
19/06/2014, 19:20
... still not satisfied after a printing running on the machine shown in the Fig. 6(a),
feeding the printed sheets into machine from beginning again for multiple printing can be
considered. Fig. ... traditional printing
methods including offset printing, screen printing and a hybrid one based on gravure
printing and vacuum deposition technology, to demonstrate the possibilities of making low-
cost ... charge of three
color inks in sequence in a normal printing machine, then the thickness increase can be
achieved by putting the same conducting inks on the cylinders in different stages. If...
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Current Trends and Challenges in RFID Part 6 doc
Ngày tải lên :
19/06/2014, 19:20
... research in nature and aimed to investigate the process
consistency and capability of printing RFID tag antennas via the screening printing process
Screening printing using Ag ink with ... and recommendations
Substrate is definitely a dominant variable affecting the printability of printing antenna of
RFID tags. The results of study can assist the printing industry in determining ... printing, providing significant time and cost savings
compared to traditional etching technology. Therefore, there is a great need to investigate
the possibility of applying screen printing...
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Current Trends and Challenges in RFID Part 7 ppt
Ngày tải lên :
19/06/2014, 19:20
... using a thicker dielectric substrate and also including
in the geometry narrow and long strips (lines). C can be reduced by reducing substrate’s
relative dielectric permittivity ε
r
and increasing ... among tags, impacting both the
cases line and the border gate. For the cases line both homogeneous cases (consisting of a
single product type) and heterogeneous cases (containing products of ...
Tablets in Blister X
Tablets in a Bottle X
Granules in Sachets X
Powders in a Bottle X
Semi-liquid
Cream X X
Liquid
Syrup X
Single injectable
solution in syringe
X
Multiple injectable...
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Current Trends and Challenges in RFID Part 8 doc
Ngày tải lên :
19/06/2014, 19:20
... An RFID system may include a plurality of electronic tags on objects, animals,
and other things having unique identification information and a reader for reading or
writing information from or ... pharmaceutical supply chain has been considered and its
criticalities, in terms of kinds of goods to trace and peculiarities of the checkpoints RFID,
have been individuated and discussed. The inadequateness ... suffering from the DC-offset phenomenon
by using the phase inversion information instead of the amplitude information. In order to
High Performance UHF RFID Tags
for Item-Level Tracing Systems in...
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Current Trends and Challenges in RFID Part 9 ppt
Ngày tải lên :
19/06/2014, 19:20
... p
1
/2π. Consider the opamp in the inverting configuration as in figure 10.
Fig. 10. Inverting amplifier
Assuming that there is no current into the inverting input, the current law gives (V
I
... Perspective
237
maintain the same Q
S
) and increase of C
A
(to maintain the tuning). However, the reader
designer should be aware that, as shown by (7), decreasing L
A
while maintaining the quality ... Steps in deriving the principle of low coupling approximation
Current Trends and Challenges in RFID
248
a linear system whose input is the voltage source V
T
internal to the tag and the...
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Current Trends and Challenges in RFID Part 10 doc
Ngày tải lên :
19/06/2014, 19:20
... connection speed and
commands for handling communication with tags. Examples of commands are following:
- Anti-collision/select (ACS): After broadcasting this command, tags begins transmitting
their ... attack time. During an exposure period, an adversary is
able to observe and disturb all interactions involving a target tag
and a legitimate reader
using oracle
according ... tags and what they estimate.
2.3.1 H. Vogt’s algorithm
In this scheme, they estimate the number of tags using the current frame size and the
result of read cycle. And then updates the current...
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Current Trends and Challenges in RFID Part 11 doc
Ngày tải lên :
19/06/2014, 19:20
... anti-collision in UHF-RFID-based systems. The following sections introduce
CDMA by outlining the advantages over the current used TDMA schemes. After introducing
particular problems backscattering RFID ... BFSA-Non-Muting and BFSA-Muting a computing program was
developed [appendix C] and equation 6, 7, 9, 10, 11, 14, 15, 16, 17, 18 and 21 in Section 3 are
used.
The minimum total census delay was increased ... principle is also indicted in Figure 3, showing the RFID reader transmitting
a sinusoidal wave over its transmit antenna TX, thus allowing the various transponders in the
field to modulate and...
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Current Trends and Challenges in RFID Part 12 pot
Ngày tải lên :
19/06/2014, 19:20
... Communications and Networks (ICCCN), 2010 Proceedings of 19th International
Conference on, pp. 1 –6.
328
Current Trends and Challenges in RFID
Current Trends and Challenges in RFID
348
Taking into ... i.e., downmixing, analog baseband
processing and A/D conversion
• Find separate data streams (transp onders) by des preading, demodulating and decoding
the signals
The Receiving system mainly consists ... sampling of independent random variables x
i
and
y
i
in function of numbers product: multiple sampling of m and n-tags location
Assuming that the probability PP exceeds the value 0.95 independently...
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Current Trends and Challenges in RFID Part 13 pot
Ngày tải lên :
19/06/2014, 19:20
... received support from the Global COE Program "Creating
innovation by the integration of Medicine and Engineering using information and
communication" of Yokohama National University. ... delay included
in the measured value is reduced step-by-step by repeatedly applying the compensation
function. This helps in minimizing the effect on the line-of-sight (LOS) node, resulting in ... preamble. In the
case of multiple incoming signals, the time of arrival of the signal taking the longest path is
considered to be the reception time.
2.1 Principle of TDOA positioning algorithm
In...
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