计算机通用接口在控制系统中的开发与应用

基于计算机的通用输入输出接口作为自控系统操作的一种方法,可以达到灵活、方便地利用PC进行控制的目的,本文介绍两种计算机接口的控制与编程的实现方法。     

计算机通用接口在控制系统中的开发与应用

基于计算机的通用输入输出接口作为自控系统操作的一种方法,可以达到灵活、方便地利用PC进行控制的目的,本文介绍两种计算机接口的控制与编程的实现方法.     

基于FPGA的CompactFlash卡端接口设计

根据CompactFlash(CF)规范,设计了一种基于FPGA的CF卡端接口,实现了存储器模式和I/O模式两种方式的接口设计,可作为大部分便携式I/O设备的接口,硬件测试证明本文设计的CF接口可正常与上位机通信.与基于独立接口转换芯片的设计方案相比,本方案设计灵活,系统成本和功耗更低.     

CPU的串行外设接口通讯在试飞数据下载中的应用

串行外设接口(SPI)是一种简单的高速通讯接口。简要介绍使用F240的SPI同步通讯接口的硬件设计和软件算法。该系统满足了试飞数据下载对通讯速率的要求，成本低、速度高。在同步通讯系统设计中具有典型性和实用性。     

一种高速的串行通讯接口

通常,计算机与外围设备之间进行数据传送时主要分为并行方式和串行方式两种。并行方式数据吞吐量大,传送速率高,但接口线路复杂,传送距离短。串行接口,工作方式灵活,接口线路简单,传送距离远,但传送速率低是其不足之处。本文旨在介绍一种用DMA 控制的简单实用的高速串行通讯接口,以满足某些方面的通讯需要。     

智能传感器在物联网领域中的应用

介绍了智能传感器的概念和基本特点,分析了IEEE 1451关键的通讯接口规范以及我国提出的智能传感器系统标准体系架构,阐述了智能传感器在物联网中的应用情况及未来发展。     

通讯接口保护转换器

通讯接口保护转换器是一种程控交换机与数据终端设备之间的保护转换接口，它通过对光隔离器件等隔离手段的采用使通讯接口免受损坏，本文简述了通讯接口保护转换器的工作原理、实施方法及其功用，为通讯接口提供了一种保护手段。     

焊接机器人系统通信接口分析与设计

焊接机器人系统通讯接口设计包括软件设计和硬件设计两个方面，焊接机器人控制系统通常为分散式的结构，机器人本体控制系统与焊接控制系统是相互分离的。本文对焊接控制系统与焊接机器人控制系统之间的信号通讯关系进行了分析，同时探讨了系统的工作时序，提出了一种通信接口线路。     

单片机软件模拟SPI接口的解决方案

SPI接口是一种同步串行通讯接口，具备SPI接口的外围芯片十分丰富，应用非常广泛。但是，具备SPI接口的单片机种类较少。介绍了一种基于单片机的模拟SPI接口的方法，使没有SPI接口的单片机扩展带有SPI接口的外围芯片成为现实。     

基于F240的SPI通讯在试飞数据下载中的应用

SPI是一种简单高速的通讯接口。本文简要地介绍了使用F240的SPI同步通讯接口的硬件设计和软件算法。该系统满足了试飞数据下载对通讯速率的要求，成本低、速度快。在同步通讯系统设计中具有典型性和实用性。     

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.     

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     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first