Location:
Search - Immunity
Search list
Description: 介绍一种实用的二维条码识别算法。首先探讨了二维条码的定位与分割算法,利用Hough变换与Sobel边缘检测把条码图像从原始采集的图像中有效地分割出来 然后分析了条码图像经过光学系统的噪声模型,提出了一种计算点扩展函数标准方差的算法 采用Flourier变换自适应地选取阈值去除噪声导致的无效边界,从而得到条码的基本模块。实验结果表明,该算法具有很好的抗噪性,提高了二维条码的识别率。
-A practical two-dimensional barcode recognition algorithms. First of all two-dimensional bar code of the positioning and segmentation algorithm using Hough Transform and Sobel edge detection of the bar code images collected from the original image to effectively separate and then analyzes the barcode image through the optical system of the noise model, put forward a Calculation of point spread function of standard deviation of the algorithm uses Flourier transform adaptively select the threshold to remove noise caused by invalid border, bar code and thus be the basic module. Experimental results show that the algorithm has good noise immunity, improved two-dimensional bar code recognition rate.
Platform: |
Size: 2048 |
Author: 黄新 |
Hits:
Description: 介绍一种实用的二维条码识别算法。首先探讨了二维条码的定位与分割算法,利用Hough变换与Sobel边缘检测把条码图像从原始采集的图像中有效地分割出来 然后分析了条码图像经过光学系统的噪声模型,提出了一种计算点扩展函数标准方差的算法 采用Flourier变换自适应地选取阈值去除噪声导致的无效边界,从而得到条码的基本模块。实验结果表明,该算法具有很好的抗噪性,提高了二维条码的识别率。
-A practical two-dimensional barcode recognition algorithms. First of all two-dimensional bar code of the positioning and segmentation algorithm using Hough Transform and Sobel edge detection of the bar code images collected from the original image to effectively separate and then analyzes the barcode image through the optical system of the noise model, put forward a Calculation of point spread function of standard deviation of the algorithm uses Flourier transform adaptively select the threshold to remove noise caused by invalid border, bar code and thus be the basic module. Experimental results show that the algorithm has good noise immunity, improved two-dimensional bar code recognition rate.
Platform: |
Size: 1024 |
Author: 黄新 |
Hits:
Description: January 1988
MM54HC00/MM74HC00
Quad 2-Input NAND Gate
General Description
These NAND gates utilize advanced silicon-gate CMOS
technology to achieve operating speeds similar to LS-TTL
gates with the low power consumption of standard CMOS
integrated circuits. All gates have buffered outputs. All de-
vices have high noise immunity and the ability to drive 10
LS-TTL loads. The 54HC/74HC logic family is functionally
as well as pin-out compatible with the standard 54LS/74LS
logic family. All inputs are protected from damage due to
static discharge by internal diode clamps to VCC and
ground.
Features
Y Typical propagation delay: 8 ns
Y Wide power supply range: 2–6V
Y Low quiescent current: 20 mA maximum (74HC Series)
Y Low input current: 1 mA maximum
Y Fanout of 10 LS-TTL loads-January 1988MM54HC00/MM74HC00Quad 2-Input NAND GateGeneral DescriptionThese NAND gates utilize advanced silicon-gate CMOStechnology to achieve operating speeds similar to LS-TTLgates with the low power consumption of standard CMOSintegrated circuits. All gates have buffered outputs. All de-vices have high noise immunity and the ability to drive 10LS-TTL loads. The 54HC/74HC logic family is functionallyas well as pin-out compatible with the standard 54LS/74LSlogic family. All inputs are protected from damage due tostatic discharge by internal diode clamps to VCC andground. FeaturesY Typical propagation delay: 8 nsY Wide power supply range: 2-6VY Low quiescent current: 20 mA maximum (74HC Series) Y Low input current: 1 mA maximumY Fanout of 10 LS-TTL loads
Platform: |
Size: 11897856 |
Author: 123wj |
Hits:
Description: Ultra wideband (UWB) technology, well-known for its use in ground penetrating
radar, has also been of considerable interest in communications and radar applications
demanding low probability of intercept and detection (LPI/D), multipath immunity, high
data throughput, precision ranging and localization.-Ultra wideband (UWB) technology, well-known for its use in ground penetratingradar, has also been of considerable interest in communications and radar applicationsdemanding low probability of intercept and detection (LPI/D), multipath immunity, highdata throughput, precision ranging and localization .
Platform: |
Size: 36864 |
Author: Frank |
Hits:
Description: Ultra wideband (UWB) technology, well-known for its use in ground penetrating
radar, has also been of considerable interest in communications and radar applications
demanding low probability of intercept and detection (LPI/D), multipath immunity, high
data throughput, precision ranging and localization.-Ultra wideband (UWB) technology, well-known for its use in ground penetratingradar, has also been of considerable interest in communications and radar applicationsdemanding low probability of intercept and detection (LPI/D), multipath immunity, highdata throughput, precision ranging and localization .
Platform: |
Size: 635904 |
Author: Frank |
Hits:
Description: FSK调制与解调，整个设计基于ALTERA公司的QuartusⅡ开发平台，并用Cyclone系列FPGA实现。所设计的调制解调器具有体积小、功耗低、集成度高、软件可移植性强、扰干扰能力强的特点,符合未来通信技术设计的方向。-FSK modulation and demodulation, the entire design is based on ALTERA' s development platform Quartus Ⅱ, and Cyclone series FPGA implementation. Designed by the modem with a small size, low power consumption, high integration, software portability, and strong interference immunity characteristics consistent with the design of future communication technology direction.
Platform: |
Size: 575488 |
Author: 张继峰 |
Hits:
Description: 经典的susan算法，可以有效的提取出图像边缘，抗噪性好-Susan classic algorithms, can effectively extract the edge of the image, better noise immunity
Platform: |
Size: 9216 |
Author: yingzi0505 |
Hits:
Description: Billy Belceb 病毒编写教程,很好的病毒入门学习资料-Billy Belceb virus preparation of curricula, learning good information on the virus entry
Platform: |
Size: 125952 |
Author: 王力 |
Hits:
Description: 扰性电路技术（2006中文第三版）.pdf一本新颖的现代印刷电路技术书籍-Immunity circuit techniques (third edition, 2006 English). Pdf of a new book of modern printed circuit technology
Platform: |
Size: 13720576 |
Author: 刘 |
Hits:
Description: 国际标准，需要收费的现贡献给大家，This European Standard specifies the emission and immunity requirements for all types of rolling
stock. It covers traction stock and trainsets including urban vehicles for use in city streets.
The frequency range considered is from d.c. to 400 GHz. No measurements need to be performed at
frequencies where no requirement is specified.-High powered electronic equipment, together with low power microcontrollers and other electronic
devices, is being installed on trains in great numbers. Electromagnetic compatibility has therefore
become a critical issue for the design of train related apparatus as well as of the train as a whole.
This Product Standard for rolling stock sets limits for electromagnetic emission and immunity in order
to ensure a well functioning system within its intended environment.
Immunity limits are not given for the complete vehicle. Part 3-2 of this standard defines requirements
for the apparatus installed in the rolling stock, since it is impractical to test the complete unit. An EMC
plan shall be established for equipment covered by this standard.
Platform: |
Size: 209920 |
Author: 钟杨 |
Hits:
Description: 国际标准，现贡献给大家，This European Standard applies to emission and immunity aspects of EMC for electrical and electronic
apparatus intended for use on railway rolling stock. EN 50121-3-2 applies for the integration of
apparatus on rolling stock.
The frequency range considered is from d.c. to 400 GHz. No measurements need to be performed at
frequencies where no requirement is specified.
The application of tests shall depend on the particular apparatus, its configuration, its ports, its
technology and its operating conditions.
-This European Standard applies to emission and immunity aspects of EMC for electrical and electronic
apparatus intended for use on railway rolling stock. EN 50121-3-2 applies for the integration of
apparatus on rolling stock.
The frequency range considered is from d.c. to 400 GHz. No measurements need to be performed at
frequencies where no requirement is specified.
The application of tests shall depend on the particular apparatus, its configuration, its ports, its
technology and its operating conditions.
Platform: |
Size: 321536 |
Author: 钟杨 |
Hits:
Description: 国际标准，需要收费的，我找得好苦找到的，现贡献给大家
Railway applications —
Electromagnetic
compatibility —
Part 4: Emission and immunity of the
signalling and telecommunications
apparatus-Railway applications —
Electromagnetic
compatibility —
Part 4: Emission and immunity of the
signalling and telecommunications
apparatus
Platform: |
Size: 350208 |
Author: 钟杨 |
Hits:
Description: 国际标准，需要收费的，我找得好苦找到的，现贡献给大家
Railway applications —
Electromagnetic
compatibility —
Part 5: Emission and immunity of fixed
power supply installations and
apparatus-Railway applications —
Electromagnetic
compatibility —
Part 5: Emission and immunity of fixed
power supply installations and
apparatus
Platform: |
Size: 229376 |
Author: 钟杨 |
Hits:
Description: 本程序是系统安全方面用来对U盘病毒及其免疫程序的实现，-u_disk virus and immunity of realization
Platform: |
Size: 2048 |
Author: 林 |
Hits:
Description: The API Spyer tracks any window that the mouse is over, giving info such as the window handle (hWnd), its class name, its text, etc. This program also allows you to change the text of a window, get its hDC and Window Rect, and change its enabled and visible states. The API Spyer also features self-immunity so that it will not track itself (so you can click on the command button to change the current window, for instance) and can be set to stay on top.
Note: beware as to what windows you are hiding/disabling because you might not be able to show/enable them again (like the desktop windows).
Platform: |
Size: 7168 |
Author: coder0101 |
Hits:
Description: 用于免疫算法的线性的检测器生成算法，该程序用于流量预测等方面。-Immune algorithm for the linear detector generating algorithm, the program for flow projections and so on.
Platform: |
Size: 1037312 |
Author: txppy |
Hits:
Description: IEEE paper about Analysis of the effectiveness of ferrite core for improving EFT immunity
Platform: |
Size: 136192 |
Author: kinjal |
Hits:
Description: In medicine, historically, the term “immunity” refers to the condition in which
an organism can resist diseases, more specifi cally infectious diseases. However, a
broader defi nition of immunity is the reaction to foreign substances (pathogens),
which includes primary and secondary immune responses.
Platform: |
Size: 3808256 |
Author: wu |
Hits:
Description: Presently FFT usage in GPS receivers has been a
topic of extensive study and many improved FFT-based
acquisition methods with averaging correlation
technique also have emerged. Although averaging
arithmetic can reduce the instant processing points of
FFT/IFFT, their noise performance is not promising. In
this paper a novel compress-sampling algorithm for
FFT-base GPS signal acquisition method is proposed.
It not only diminishes the size of FFT/IFFT core but
also enhances the noise immunity of receiver with its
“redundancy” structure. Simulation results of Matlab
testify that the computational complexity of the novel
algorithm has been efficiently suppressed to only
0.93 over the 2D search method in time domain. At
the same time the lower amplitude threshold obtained
from the novel method gets a lower false alarm
probability comparing with the direct DFT algorithm
with no compression. The noise immunity is enhanced-Presently FFT usage in GPS receivers has been a
topic of extensive study and many improved FFT-based
acquisition methods with averaging correlation
technique also have emerged. Although averaging
arithmetic can reduce the instant processing points of
FFT/IFFT, their noise performance is not promising. In
this paper a novel compress-sampling algorithm for
FFT-base GPS signal acquisition method is proposed.
It not only diminishes the size of FFT/IFFT core but
also enhances the noise immunity of receiver with its
“redundancy” structure. Simulation results of Matlab
testify that the computational complexity of the novel
algorithm has been efficiently suppressed to only
0.93 over the 2D search method in time domain. At
the same time the lower amplitude threshold obtained
from the novel method gets a lower false alarm
probability comparing with the direct DFT algorithm
with no compression. The noise immunity is enhanced
Platform: |
Size: 254976 |
Author: zohreh |
Hits:
Description: Presently FFT usage in GPS receivers has been a
topic of extensive study and many improved FFT-based
acquisition methods with averaging correlation
technique also have emerged. Although averaging
arithmetic can reduce the instant processing points of
FFT/IFFT, their noise performance is not promising. In
this paper a novel compress-sampling algorithm for
FFT-base GPS signal acquisition method is proposed.
It not only diminishes the size of FFT/IFFT core but
also enhances the noise immunity of receiver with its
“redundancy” structure. Simulation results of Matlab
testify that the computational complexity of the novel
algorithm has been efficiently suppressed to only
0.93 over the 2D search method in time domain. At
the same time the lower amplitude threshold obtained
from the novel method gets a lower false alarm
probability comparing with the direct DFT algorithm
with no compression. The noise immunity is enhanced-Presently FFT usage in GPS receivers has been a
topic of extensive study and many improved FFT-based
acquisition methods with averaging correlation
technique also have emerged. Although averaging
arithmetic can reduce the instant processing points of
FFT/IFFT, their noise performance is not promising. In
this paper a novel compress-sampling algorithm for
FFT-base GPS signal acquisition method is proposed.
It not only diminishes the size of FFT/IFFT core but
also enhances the noise immunity of receiver with its
“redundancy” structure. Simulation results of Matlab
testify that the computational complexity of the novel
algorithm has been efficiently suppressed to only
0.93 over the 2D search method in time domain. At
the same time the lower amplitude threshold obtained
from the novel method gets a lower false alarm
probability comparing with the direct DFT algorithm
with no compression. The noise immunity is enhanced
Platform: |
Size: 87040 |
Author: zohreh |
Hits: