在ISDSN中应用ATM技术刍议

由于卫星信道的特殊性，将地面ＢＩＳＤＮ中采用的ＡＴＭ技术照搬到卫星通信应用中是不合适的，因此文中提出能否利用卫星通信的多点──多点通信能力来实现业务的综合传输和交换（即ＡＴＭ方式）的新思路，同时分析了在ＩＳＤＳＮ中应用ＡＴＭ的必要性和前提条件。     

在ISDSN中应用ATM技术刍议

由于卫星信道的特殊性，将地面ＢＩＳＤＮ中采用的ＡＴＭ技术照搬到卫星通信是不合适的，因此文中提出能否利用卫星通信的多点－多点通信能力来实现业务的综合传输和交换的新思路，同时分析了在ＩＳＤＳＮ中应用ＡＴＭ的必要性和前提条件。     

校园计算机网络中的ATM技术

本文首先讨论了新一代计算机网络技术ＡＴＭ的特点，然后给出ＡＴＭ技术与传统ＬＡＮ技术的比较和ＡＴＭ网络与局域网互连的两种方法，最后讨论了校园计算机网络中ＡＴＭ技术的应用方法。     

基于TMN的ATM网络管理

ＡＴＭ已从一种标准和原型变成了下一代的变换技术，随着大量的ＡＴＭ交换机进入网络，迫切需要与之相应的ＡＴＭ网络管理技术。本文重点讨论了如何将计算机和电信方法综合用于ＡＴＭ网络管理，特别是ＳＮＭＰ和ＣＭＩＰ协议在ＡＴＭ网络中的应用。另外，本文也讨论了ＴＭＮ接口及其与ＡＴＭ的网络元素ＮＥ的通信方式。     

ATM LAN建立之分析

言语中通过对建立ＡＴＭ ＬＡＮ的分析，详细探讨了ＡＴＭ技术本身、ＡＴＭ ＬＡＮ建立的需求、ＡＴＭ ＬＡＮ硬件、软件的设计、相关协议机制的实现以及网络管理等。另外还就ＡＴＭ ＬＡＮ较现存ＬＡＮ的卓越之处进行了分析；并指出ＡＴＭ ＬＡＮ是现存共享式ＬＡＮ的发展方向之一。     

ATM网络上的LAN仿真技术

本文比较ＡＴＭ网络和ＬＡＮ的区别。对ＡＴＭ局域网技术作了论述，内容包括ＡＴＭＬＡＮ仿真的组成、工作原理及其特点。     

宽带综合业务数字网技术讲座

近年来，国外电信发达国家纷纷进行了有关ＡＴＭ的现场试验，并逐步向商用化发展。一些交换机制造厂家和大、中、小计算机公司也推出了ＡＴＭ设备，竞相占领电信市场。我国在几个大城市也开始了ＡＴＭ的试验。ＡＴＭ是构成宽带综合业务数字网的技术基础，了解相关技术演进是非常必要的。本讲座将陆续向读者介绍有关Ｂ－ＩＳＤＮ基本概念及其提供的业务，Ｂ－ＩＳＤＮ传送手段－ＡＴＭ，Ｂ－ＩＳＤＮ信令，Ｂ－ＩＳＤＮ国际标准化的发     

ATM应用技术研究

ＡＴＭ（ａｓｙｎｃｈｒｏｎｕｓｔｒａｎａｆｅｒｍｏｄｅ）是实现Ｂ－ＩＳＤＮ宽带通信的基础与核心技术，本文从ＡＴＭ的基本特性及其应用业务入手，对ＡＴＭ交换机的技术要点，ＭＳＳＲ和ＢＡＮＹＡＮ交换方式及网络技术应用进行了理论研究与探讨，提出了ＡＴＭ的实现模式。     

交换式局域网技术二—ATM局域网

ＡＴＭ技术已被确定的Ｂ－ＩＳＤＮ中的转移模式，ＡＴＭ局域网在吞吐量、时延、虚拟网连网能及以及与Ｂ－ＩＳＤＮ互连方面具有十分优越的性能。本文对ＡＴＭ局域网技术作了论述，并介绍了一些主要的ＡＴＭ产品和厂家，供网络用户在规划，设计网络时参考。     

ATM基本技术及其在公用网应用的主要难点

ＡＴＭ技术已被公认为实现宽带综合业务数字网（Ｂ－ＩＳＤＮ）的关键技术。本文将介绍ＡＴＭ技术的基本原理－ＡＴＭ概念，ＡＴＭ协议的分层结构，ＡＴＭ网络和接口，ＡＴＭ传输与复用技术，ＡＴＭ的交换技术，ＡＴＭ的信令方式，ＡＴＭ网络管理和管制以及ＡＴＭ技术在公用网应用中的主要难点。     

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.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

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.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.