Description: ：近距离目标超高分辨率微波成像技术在安全检测、非破坏性控制、生物医学等领域中有着非常重要的应用
价值和广阔的应用前景。该文利用基于窄脉冲形式的超宽带时域雷达系统研究近距离目标的高分辨率ISAR成像，
给出了仿真和实测结果。利用转台旋转目标，基于超宽带脉冲源和超宽带收发天线以及高性能取样示波器，配以同
步触发脉冲和自行研发的数据采集软件，搭建了该时域雷达实验系统，提出了准确获取目标回波信息的实验条件，
和实现回波延时精确校正的误差补偿方法。并针对采样时间窗内的杂波干扰，讨论了时域后向投影算法(Back
Projection，BP)与背景对消技术相结合的成像算法，实现了分辨率为 8 mm 的近距离目标的成像，准确地反映了
目标的位置、形状和大小等信息。- The high resolution imaging of near field targets are interesting for security, non-destructive control and
biomedical application. In this paper, high resolution near field ISAR imaging is implemented using Ultra Wide
Band (UWB) time domain radar system. Simulation and experiment are both conducted. The target is rotated by
turntable. The system is built based on the UWB pulse source, UWB antennas, high performance sampling
oscillograph, synchronous trigger pulse and proper motion study data acquisition software. Experiment condition
and delay errors compensation method are presented to obtain accurate echo information of the target. And Back
Projection (BP) combined with background cancel algorithm is discussed considering the clutter interference in
time window. Platform: |
Size: 1698816 |
Author:chinaafxp |
Hits:
Description: 系统采用人机交互的方式，界面美观友好。
屏幕信息需要时时显示，网络延时不能大于1秒。
服务器端可以随时运行，只要客户端运行，就能够显示屏幕信息。
系统运行时占用内存不能大于10MB，以免影响系统性能。
客户端运行时需要隐藏显示窗口，起其感觉不到在运行。-System uses human-computer interaction, interface, beautiful and friendly. Screen information display need from time to time, network delay can not be greater than 1 second. Server can run at any time, as long as the client is running, will be able to display information. Memory for the system is running can not be larger than 10MB, so as not to affect system performance. Clients need to hide the display window when running, running from its feel. Platform: |
Size: 18654208 |
Author:龙无殇 |
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Description: The MAX II CPLD has the following features:
■ Low-cost, low-power CPLD
■ Instant-on, non-volatile architecture
■ Standby current as low as 29 μA
■ Provides fast propagation delay and clock-to-output times
■ Provides four global clocks with two clocks available per logic array block (LAB)
■ UFM block up to 8 Kbits for non-volatile storage
■ MultiVolt core enabling external supply voltages to the device of either 3.3 V/2.5 V
or 1.8 V
■ MultiVolt I/O interface supporting 3.3-V, 2.5-V, 1.8-V, and 1.5-V logic levels-The MAX® II family of instant-on, non-volatile CPLDs is based on a 0.18-μm, 6-layermetal-
flash process, with densities from 240 to 2,210 logic elements (LEs) (128 to 2,210
equivalent macrocells) and non-volatile storage of 8 Kbits. MAX II devices offer high
I/O counts, fast performance, and reliable fitting versus other CPLD architectures.
Featuring MultiVolt core, a user flash memory (UFM) block, and enhanced in-system
programmability (ISP), MAX II devices are designed to reduce cost and power while
providing programmable solutions for applications such as bus bridging, I/O
expansion, power-on reset (POR) and sequencing control, and device configuration
control. Platform: |
Size: 612352 |
Author:王广龙 |
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Description: ：针对航空变频交流发电机电压调节器开展研究，分析对比了多种电压反馈检测方法及其特点，设计了基于
AD536A芯片的电压有效值检测电路，分析了电路的工作原理。这种电路的缺点是电路输出响应速度越快则输
出电压纹波越大。为解决这一问题，设计了减法电路构成的滤波电路，既能进行有效滤波，又不会引起电路的延
时。为解决滤波电路输出电压毛刺问题，采用了以二极管电路构成的去毛刺电路。利用Matlab软件工具对检测
电路的输入／输出进行拟合，得出了有效值检测电路的传递函数，为整个发电系统的闭环仿真模型的构建打下了
基础。闭环实验表明，采用了有效值检测电路，在变频、发电机电压畸变情况下的发电系统输出稳态和动态性能
得到了改善-Abstract：The auto—voltage regulator for the aircraft variable frequency (VF)power system is studied．
Some voltage—feedback detection methods are discussed．A RM S detection circuit based on AD536A is
presented and the principle of the circuit is analyzed．The output response speed conflicts with the out—
put voltage ripple of the circuit．To solve this problem ，a filter circuit composed by the m inus circuit is
presented for filtering the voltage ripple without the response delay．A circuit for eliminating noise com—
posed by the diode is presented and verified by experiments． Using a M atlab software，the input and
output signals of the RM S detection circuit are identified．The transfer function of the circuit is obtained
and used in the simulation for the aircraft AC power system．The closed 1oop experimental results indi—
cate that the system output steady and dynam ic performance with the variable frequency and the genera—
tor voltage distortion is improved by using the RM S det Platform: |
Size: 395264 |
Author:wzh |
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Description: 信道均衡技术（Channel equalization）是指为了提高衰落信道中的通信系统的传输性能而采取的一种抗衰落措施。它主要是为了消除或者是减弱宽带通信时的多径时延带来的码间串扰（ISI）问题。 其机理是对信道或整个传输系统特性进行补偿，针对信道恒参或变参特性，数据速率大小不同，均衡有多种结构方式。大体上分为两大类：线性与非线性均衡。对于带通信道的均衡较为困难，一般都是待接收端解调后在基带进行均衡，因此基带均衡技术有广泛应用。在实际中一般是加入自适应滤波器来实现信道均衡。-Equalization techniques (any) is to point to in order to improve the equalization fading Channel of communication system of transmission performance to a fight decline measures. It basically is to eliminate or is weaken broadband communication the multipath delay when the code brings between crosstalk (ISI) problem. Its mechanism is the transmission system of channel or characteristics in constant and compensation, or change the channel and characteristics, data rate of different size, balanced and DuoZhong structure mode. Roughly divided into two categories: linear and nonlinear equilibrium. For the balance of the way with communication is difficult, are generally stay at the receiving end in baseband for balanced after demodulation, therefore baseband balanced technology has wide application. In actual in general was to join the adaptive filter to realize equalization.
Platform: |
Size: 4096 |
Author:韩金雨 |
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Description: 本代码为编码开关代码，编码开关也就是数字音响中的
360度旋转的数字音量以及显示器上用的（单键飞梭开
关）等类似鼠标滚轮的手动计数输入设备。
我使用的编码开关为5个引脚的，其中2个引脚为按下
转轮开关（也就相当于鼠标中键）。另外3个引脚用来
检测旋转方向以及旋转步数的检测端。引脚分别为a,b,c
b接地a，c分别接到P2.0和P2.1口并分别接两个10K上拉
电阻，并且a，c需要分别对地接一个104的电容，否则
因为编码开关的触点抖动会引起轻微误动作。本程序不
使用定时器，不占用中断，不使用延时代码，并对每个
细分步数进行判断，避免一切误动作，性能超级稳定。
我使用的编码器是APLS的EC11B可以参照附件的时序图
编码器控制流水灯最能说明问题，下面是以一段流水
灯来演示。-This code for code switch code, coding switch is the digital audio
360 degrees of rotation digital volume and displays use on the open list key shuttle (
Closed) and similar mouse wheel manual count input device.
I use a code switch for five of the pins, with two pins for press
The runner switch (also is equivalent to the middle mouse button). Three other pins are used to
The rotation direction detection and rotation of the number of detection. Pins are respectively for a, b, c
B, c received a ground respectively P2.0 and P2.1 mouth and take two 10 K respectively on pull
Resistance, and a, c need to pick up a respectively in 104, otherwise the capacitance
Because of the code switch contacts jitter can cause minor wrong action. This procedure does not
Use timer, do not take up interrupt, do not use delay, and each code
Segment for judgment, avoid steps all misoperation, super stable performance.
I use of APLS is encoder EC11B can refer to the attachment sequence chart
Encode Platform: |
Size: 824320 |
Author:赵博伟 |
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Description: 本系统属于小型的局域网监控系统，可以对某一台计算机进行屏幕监控，本系统主要实现以下功能：
系统采用人机交互的方式，界面美观友好。
屏幕信息需要时时显示，网络延时不能大于1秒。
服务器端可以随时运行，只要客户端运行，就能够显示屏幕信息。
系统运行时占用内存不能大于10MB，以免影响系统性能。
客户端运行时需要隐藏显示窗口，使其感觉不到在运行。-The system is a small local area network monitoring system, a screen of a computer monitor, the system achieve the following key features: The system uses human-computer interaction, interface, beautiful and friendly. Screen information display need from time to time, network delay can not be greater than 1 second. Server can run at any time, as long as the client is running, will be able to display information. Memory for the system is running can not be larger than 10MB, so as not to affect system performance. Client runtime needs to hide the display window, so do not feel in the run. Platform: |
Size: 18660352 |
Author: |
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Description: 本文介绍了一种Star-Subne SS()国家奥委会
建筑。基于当前的陈腔滥调。结构一队
所有的规则的网格节点的组织吗
使用拓扑、SS一队的概念,进一步子网
它描述一个路由器和四个节点,
星际互联拓扑的子网。OPNET
仿真结果表明,学生有更少的国家或地区奥委会的端到端
延迟,仅比陈腔滥调一队总数
路由器的陈腔滥调,在相同网络规模。在
另一方面,路由器的负荷小于两次学生
的陈词滥调。所以学生具有更好的调度性能,其国家或地区奥委会/成本
速度要比
-This paper introduces a kind of SS(Star-Subne) NOC
architecture. Based on current CLICHÉ structure NOC in
which all the nodes are organized in regular grid
topology, SS NOC uses further the concept of subnet and
it characterizes that one router and four nodes are
interconnected in star topology in the subnet. OPNET
simulation results show that SS NOC has less end-to-end
delay than CLICHÉ NOC and only has 1/4 total number
of routers of CLICHÉ on the same network scale. On the
other hand, the load of routers in SS is less than twice of
that of CLICHÉ . So SS NOC has better performance/cost
rate than Platform: |
Size: 94208 |
Author:王琛 |
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Description: ns中用于无线网络的仿真，并求得了无线网络的丢包率，延时时间等性能指标。-ns in the simulation for wireless networks and obtain a wireless network packet loss rate, delay time and other performance indicators. Platform: |
Size: 1024 |
Author:侯春春 |
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Description: 系统介绍
本系统属于小型的局域网监控系统，可以对某一台计算机进行屏幕监控，本系统主要实现以下功能：
系统采用人机交互的方式，界面美观友好。
屏幕信息需要时时显示，网络延时不能大于1秒。
服务器端可以随时运行，只要客户端运行，就能够显示屏幕信息。
系统运行时占用内存不能大于10MB，以免影响系统性能。
客户端运行时需要隐藏显示窗口，起其感觉不到在运行。
操作注意事项
（1）本系统默认操作员用户名为：tsoft，密码为：111。
（2）可执行文件位置：04\局域网视频监控\Server\Debug\Server.exe
04\局域网视频监控\Client\Debug\Client.exe
-System is introduced
This system belong to small LAN monitoring system, a computer to screen, this system for monitoring mainly realizes the following functions:
System USES man-machine interactive way, friendly interface aesthetics.
Screen information should always show, Internet delay is not greater than 1 second.
The server can run at any time, as long as the client operation, can display information.
System is running to use memory is not greater than 10 MB, lest affect system performance.
The client to run hidden display window, up the feel is running.
Operation caution
(1) the system default user name: tsoft operator, password: 111.
(2) executable file location: the local area network video monitoring \ \ \ Debug \ Server. The Server exe
The local area network video monitoring \ \ \ Debug \ are for. Exe Platform: |
Size: 14477312 |
Author:大江 |
Hits:
Description: Key Features
* Neural network design, training, and simulation
* Pattern recognition, clustering, and data-fitting tools
* Supervised networks including feedforward, radial basis, LVQ, time delay, nonlinear autoregressive (NARX), and layer-recurrent
* Unsupervised networks including self-organizing maps and competitive layers
* Preprocessing and postprocessing for improving the efficiency of network training and assessing network performance
* Modular network representation for managing and visualizing networks of arbitrary size
* Routines for improving generalization to prevent overfitting
* Simulink® blocks for building and evaluating neural networks, and advanced blocks for control systems applications-Key Features
* Neural network design, training, and simulation
* Pattern recognition, clustering, and data-fitting tools
* Supervised networks including feedforward, radial basis, LVQ, time delay, nonlinear autoregressive (NARX), and layer-recurrent
* Unsupervised networks including self-organizing maps and competitive layers
* Preprocessing and postprocessing for improving the efficiency of network training and assessing network performance
* Modular network representation for managing and visualizing networks of arbitrary size
* Routines for improving generalization to prevent overfitting
* Simulink® blocks for building and evaluating neural networks, and advanced blocks for control systems applications Platform: |
Size: 252928 |
Author:bacha |
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Description: 控制规律的选用要根据过程特性和工艺要求来选取，决不是说PID控制规律在任何情况下都具有较好的控制性能，不分场合都采用是不明智的。如果这样做，只会给其它工作增加复杂性，并给参数整定带来困难。当采用PID控制器还达不到工艺要求，则需要考虑其它的控制方案。如串级控制、前馈控制、大滞后控制等。
-Choice of control law according to process characteristics and process requirements to select, does not mean that PID control law in any case have a better control performance, are used regardless of where it would be unwise. If you do, will only add to the complexity of other work, and to the parameter tuning difficult. When using the PID controller has not yet reached technological requirements, you need to consider other control options. Such as cascade control, feedforward control, large time delay control. Platform: |
Size: 216064 |
Author:ifengdoo |
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Description: SC-fde中在信道最大时延为40的情况的下，对不同长度的UW（本例为CHU序列）进行性能比较。-SC-fde in the channel maximum delay of 40, under the circumstances, for different lengths of UW (CHU sequence in this case) for performance comparison. Platform: |
Size: 7168 |
Author:cheng |
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Description: SC-FDE信道最大时延为40的情况的，采用不同长度的UW（本例为Frank-Zadoff序列）的性能进行比较-SC-FDE channel maximum delay of 40 cases, using different lengths of UW (in this case, Frank-Zadoff sequence) to compare the performance of Platform: |
Size: 7168 |
Author:cheng |
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Description: a gain-adjusted fuzzy PI/PD (GFPIPD) adaptive controller is proposed. The proposed controller first
constructs fuzzy rules for fuzzy PD/PI controller with the fixed weighting. Then the fuzzy rules, which self-learning their parameters for a desired condition, are learned through the accumulated GA. Finally, fuzzy gain-adjusted mechanism is further learned through the accumulated GA for the variations
of a measured system dynamics. The proposed GFPIPD controller is tested by the high order systems with time delay and variable system dynamics. The experimental results illustrate the performance of the proposed method.
Platform: |
Size: 166912 |
Author:dp |
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Description: 本系统属于小型的局域网监控系统，可以对某一台计算机进行屏幕监控，本系统主要实现以下功能：
系统采用人机交互的方式，界面美观友好。
屏幕信息需要时时显示，网络延时不能大于1秒。
服务器端可以随时运行，只要客户端运行，就能够显示屏幕信息。
系统运行时占用内存不能大于10MB，以免影响系统性能。
客户端运行时需要隐藏显示窗口，起其感觉不到在运行。-The system is a small local area network monitoring system that can be screen of a computer monitor, the system to achieve the following functions:
system uses human-computer interaction, interface, beautiful and friendly.
display screen information required from time to time, network delay is not greater than 1 second.
server can run at any time, as long as the client is running, you can display on-screen information.
memory for the system is running can not be larger than 10MB, so as not to affect system performance.
the client runtime to hide the display window, running from its feel.
Platform: |
Size: 3087360 |
Author:llwh8080 |
Hits:
Description: JITTERBUG 是一个用来仿真线性控制系统的Matlab工具箱。通过JITTERBUG，我们能得到延时、数据丢失对系统的性能影响。同时，这个工具箱还能计算控制系统中信号的谱密度。-JITTERBUG [Lincoln and Cervin, 2002] is a MATLAB-based toolbox that allows
the computation of a quadratic performance criterion for a linear control
system under various timing conditions. Using the toolbox, one can easily
and quickly assert how sensitive a control system is to delay, jitter, lost
samples, etc., without resorting to simulation. The tool is quite general and
can also be used to investigate jitter-compensating controllers, aperiodic
controllers, and multi-rate controllers. As an additional feature, it is also
possible to compute the spectral density of the signals in the control system.
The main contribution of the toolbox, which is built on well-known theory
(LQG theory and jump linear systems), is to make it easy to apply this
type of stochastic analysis to a wide range of problems. Platform: |
Size: 35840 |
Author:钱三强 |
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Description: 在不考虑时滞的条件下，建立PH中和过程的数学模型，利用反S变换和线性PI控制器对其进行控制仿真实验。-Without considering the delay conditions, establish mathematical models of PH in the process ,and anti-S-transform and linear PI controller is used to simulater control performance in matlab. Platform: |
Size: 50176 |
Author:shitou |
Hits:
Description: 系统采用人机交互的方式，界面美观友好。
屏幕信息需要时时显示，网络延时不能大于1秒。
服务器端可以随时运行，只要客户端运行，就能够显示屏幕信息。
系统运行时占用内存不能大于10MB，以免影响系统性能。
客户端运行时需要隐藏显示窗口，起其感觉不到在运行。
- system uses human-computer interaction, interface, beautiful and friendly.
display screen information required from time to time, network delay is not greater than 1 second.
server can run at any time, as long as the client is running, you can display on-screen information.
memory for the system is running can not be larger than 10MB, so as not to affect system performance.
the client runtime to hide the display window, running from its feel.
Platform: |
Size: 18249728 |
Author:zhangziyan |
Hits:
Description: 介绍了三点垂直线阵被动定位的原理. 结合矢量水听器测得的方位角和高低角及到达
阵元间的时延差, 建立了三维坐标下的状态方程和观测方程.运用扩展卡尔曼滤波算法, 研究了该系统的目标运动分析问题. 通过蒙特卡洛模拟仿真试验, 结果表明上述方法具有较高的定位性能,有较强的使用价值.
-Introduced three vertical linear array passive location principle of vector hydrophone. Combining the measured azimuth angle and pitch angle and arrival time delay difference between array elements, establish the three-dimensional coordinates of the state equation and observation equation. Using the extended Calman filter algorithm, on the target motion analysis by Monte Carlo simulation. Test, results show that the method has high positioning performance, has the strong use value. Platform: |
Size: 240640 |
Author:于文娟 |
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Search - delay performance