具有纵横输入互连方式和缓冲结构的递是Knockout交换网络

本文提出了具有纵横输入（Ｃｒｏｓｓｂａｒ Ｉｎｐｕｔ）互连方式和输入缓冲（Ｉｎｐｕｔ Ｂｕｆｆｅｒｅｄ）结构的递归Ｋｎｏｃｋｏｕｔ交换网络（ＣＩＢ－ＲＫＳ）。通过采用纵横输入互连方式可减少内部小交换单元的数目,并可使信元传送顺序不会受群出端口数目的影响。而通过在每个输入端放置缓冲器可在保持丢失率性能不变的情况下,可使整个交换网络的级数减少,从而也就减少了信元在群网络中的传输时延,另外,在该结构中,     

具有纵横输入互连方式和缓冲结构的递归Knockout交换网络

本文提出了具有纵横输入（ＣｒｏｓｂａｒＩｎｐｕｔ）互连方式和输入缓冲（ＩｎｐｕｔＢｕｆｅｒｅｄ）结构的递归Ｋｎｏｃｋｏｕｔ交换网络（ＣＩＢＲＫＳ）．通过采用纵横输入互连方式可减少内部小交换单元的数目,并可使信元传送顺序不会受群输出端口数目的影响．而通过在每个输入端放置缓冲器可在保持丢失率性能不变的情况下,可使整个交换网络的级数减少,从而也就减少了信元在群网络中的传输时延．另外,在该结构中,通过把信元滤址的功能从每个小交换单元中提取出来放在每个输入端口,又进一步减少了小交换单元的功能．通过比较,我们认为,作为大规模ＡＴＭ交换网络结构,ＣＩＢＲＫＳ结构比传统的ＲＫＳ结构具有较好的性能／复杂度特性．     

基于信元分布网络结构的内部无阻塞Banyan┐n网络

本文首先给出了Ｂａｎｙａｎ－ｎ网络的概念。在指出了传统缓冲Ｂａｎｙａｎ－ｎ中存在的内部阻塞现象以后，提出了一种具有信元分布网络（ＣｅｌＤｉｓｔｒｉｂｕｔｉｏｎＮｅｔｗｏｒｋ，ＣＤＮ）结构的Ｂａｎｙａｎ－ｎ网络，该网络几乎无内部信元阻塞。同时，通过在每个交换单元中采用Ｋｎｏｃｋｏｕｔ交换结构，可使其内部加速因子保持恒定，从而使其能够作为构成大规模ＡＴＭ交换网络的一种基本结构。     

基于信元分布网络结构的内部无阻塞Banyan-n网络

本文首先给出Ｂａｎｙａｎ－ｎ网络的概念，在指出了传统缓冲Ｂａｎｙａｎ－ｎ中存在的内部阻塞现象以后，提出了一种具有信元分布网络（ＣｅｌｌＤｉｓｔｒｉｂｕｔｉｏｎＮｅｔｗｏｒｋ，ＣＤＮ）结构的Ｂａｎｙａｎ－ｎ网络，该网络几乎无内部信元阻塞，同时，通过在每个交换单元中采用Ｋｎｏｃｋｏｕｔ交换结构，可使其内部加速因子保持恒定，从而使其能够作为构成大规模ＡＴＭ交换网络的一种基本结构。     

Auto-Cross-and Triple-Correlations of Sequences

Ａｕｔｏ－Ｃｒｏｓｓ－ａｎｄＴｒｉｐｌｅ－ＣｏｒｒｅｌａｔｉｏｎｓｏｆＳｅｑｕｅｎｃｅｓ￥ＹａｎｇＹｉｘｉａｎ（ＤｅｐａｒｔｍｅｎｔｏｆｉｎｆｏｒｍａｔｉｏｎＥｎｇｉｎｅｅｒｉｎｇ，ＢｅｉｊｉｎｇＵｎｉｖｅｒｓｉｔｙｏｆＰｏｓｔｓａｎｄＴｅｌｅｃｏｍ...     

宽带ISDN与ATM交换技术：第三讲 ATM交换技术

本文介绍了ＡＴＭ交换的基本原理，研究了ＡＴＭ交换结构的分类，并讨论了几种典型的ＡＴＭ交换网络，包括ＢＳＳ交换结构、Ｂｏｘａｎｎｅ交换单元和交换机构以及Ｂａｔｃｈｅｒ－Ｂａｎｙａｎ多级互连网络。     

光ATM交换技术

本文介绍两种用于大容量交换系统的光ＡＴＭ信元交换结构，一种是以超短光脉冲为基础的广播及选通（ｂｒｏａｄｃａｓｔ—ａｎｄ—ｓｅｌｅｃｔ）星形网；另一种是以具有光矩阵开关为基础的超立方网。文中描述及论证了支持这些结构的关键技术及其实现结果。例如：高速信元形成，全光寻址匹配和全光同步电路     

ATM基本概念和交换原理

异步转移模式是ＣＣＩＴＴ选定作为Ｂ－ＩＳＤＮ的交换和复用技术。ＡＴＭ在物理信道上用固定长度的信元进行复用和交换。本文对ＡＴＭ的概念和工作原理作了概括介绍。     

只有两个外部元件的BiCMOS话音电路

只有两个外部元件的ＢｉＣＭＯＳ话音电路＝ＡＢｉＣＭＯＳｓｐｅｅｃｈｃｉｒｃｕｉｔｗｉｔｈｏｎｌｙｔｗｏｅｘｔｅｒ－ｎａｌｃｏｍｐｏｎｅｎｔｓ［刊，英］／Ｃａｓｔｅｌｌｏ，Ｒ．…ＩＥＥＥＪ．Ｓｏｌｉｄ－ＳｔａｌｅＣｉｒｃｕｉｔｓ．１９９３．２８（７）．...     

DOS工作站与Windows NT服务器的连接

本文以ＷｉｎｄｏｗｓＮＴ网络操作系统为基础,利用ＭｉｃｒｏｓｏｆｔＣｌｉｅｎｔ３．０ｆｏｒＭＳ－ＤＯＳ网络客户系统软件为工具,实现了ＤＯＳ工作站与ＷｉｎｄｏｗｓＮＴ服务器的连接,共享服务器中的资源,并给出了具体的实现过程。     

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