基于Visual C++平台的信号采集分析系统

利用Visual C++平台设计出了一种信号采集分析系统,介绍了如何利用Activex控件进行串口通信采集信号数据,并实现了对数据进行分析处理、显示以及保存等功能,该系统具有灵活性高、扩展性好等优点。     

基于nRF401芯片的多路消防栓无水监测系统设计

介绍一种利用无线通信芯片nRF401对消防栓无水监测系统的设计思路和实现方法,并结合单片机控制技术,给出了系统的基本结构、系统功能和设计原理。重点论述了通信处理模块、消防栓信息采集模块的设计和通信协议的制定。该系统特别适合于厂房、仓库等复杂场所的消防栓无水监测,具有较高的实用价值。     

基于DSP和CPLD的金属磁记忆检测仪设计

设计了一种以DSP+CPLD为控制核心的高性能金属磁记忆检测仪,用以快速检测铁磁材料的漏磁信号,判断材料应力集中区域。文中简述了磁记忆检测仪的主要电路及其工作原理,重点介绍了系统的硬件和软件设计。该检测仪利用DSP快速的运算处理能力,以及CPLD高效的逻辑控制和时序协调功能,保证了系统的快速信号采样、高速数据处理和实时信号显示。     

基于TMS320VC5402的指纹采集系统

设计了一种基于TMS320VC5402的指纹采集系统,利用DSP的高速处理能力,设计了一种以16位定点TMS320VC5402及MBF200指纹采集卡为核心的指纹采集模块,并采用USB2.0外设接口与PC机连接。通过此系统实现了指纹的快速采集,数据存储及USB串行通信的功能。该系统完成了指纹采集的所有软硬件设计,并实现了USB与PC机的通信软硬件调试。实验表明,该设计简单可行。     

一种能用的新型热像图处理系统

首先给出了一种通用的新型热像图处理系统－ＢＪＤ热像图处理系统的软件结构,功能,原理及其特点,并将该系统与其它热像图处理系统进行了比较,通过实例说明该系统在热像图处理方面功能丰富,具有通用性。     

一种用于汉字编码方案设计的CAD系统

本文介绍一种用于汉字编码方案设计的ＣＡＤ系统,其基本原理是采用关系型数据库管理技术,将汉字的各种基本特征存入计算机中,然后利用计算机本身的数据处理功能,对这些数据进行加工,处理,从而使汉字编码方案的设计摆脱传统的手工作业方式,纳入工程化,自动化的轨道。文中介绍了系统基本原理及其上机实现,系统功能特点及其优越性,最后对该系统作为一种数据处理型的ＣＡＤ系统的研究,开发前景作了展望。     

艺术类专业考试网上报名系统的设计与实现

在此主要描述了艺术类专业考试网上报名系统的设计与实现过程,该系统采用B/S模式,实现了考生报名、考场安排、成绩管理等一体化功能,大大缩短了考生报名和考试组织工作的时间。详细介绍了系统的开发环境、功能设计和数据库设计环节,重点阐述了系统的主要功能及其实现的关键技术。     

一种通用的新型热像图处理系统

首先给出了一种通用的新型热像图处理系统－ＢＪＤ热像图处理系统的软件结构、功能、原理及其特点，并将该系统与其它热像图处理系统进行了比较，通过实例说明该系统在热像图处理方面功能丰富，具有通用性。     

一种语言实时检测和处理系统

本文介绍了一种用于电话语音检测及处理的智能处理系统,分析了该系统的功能,设计了实现其功能的系统的网络结构、硬件结构,同时对系统功能进行模块化划分,阐述分析了各软件模块的功能,并分析了语音资料的处理流程及系统各模块的关系。     

基于.NET的计算机课程在线测试系统的设计与研究

讨论了计算机课程在线测试系统的设计,详细设计了系统的总体结构和功能模块,平台具备以下的功能:题库管理、试卷管理、在线考试、考试异常处理、成绩管理、操作题源文件上传/下载管理等主要功能,利用Ajax技术实现在线测试倒计时.     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks