通过互联网进行专利检索的两种新途径

Patentics是基于相当智能的语义搜索技术开发的专利检索系统,Freepatentsonline是一个功能强大的免费专利查询网站.结合图像通信领域的两个实际案例,介绍了专利检索网站Patentics以及Freepatentsonline的特点以及使用方法,以便于申请人尝试新的检索途径.     

试析Patentics中文非专利文献检索

现有技术的检索是专利审查过程中极为重要的环节,而检索工具的选择直接决定了检索效率.从具体案例着手,通过公开号、发明要点、关键词等检索入口对Patentics新上线的中国学位论文库和中国期刊库进行试用,比较了各种检索条件下的检索结果,分析了Patentics中文非专利文献检索的效果.     

基于B/S模式的图书馆教育信息远程检索系统设计

针对传统图书馆教育信息远程检索系统存在检索速度慢和运行性能较低的问题,提出并设计基于B/S模式的图书馆教育信息远程检索系统。给出由用户视图层、中间应用层和数据服务层组成的B/S模式结构体系。在此基础上,通过SQL语言实现远程信息检索功能,通过用户指令索引源进行索引,通过倒排索引提高检索速度,实现图书馆教育信息远程检索。实验结果表明,所设计的图书教育信息远程检索系统能够快速完成检索任务,相比传统检索系统,其稳定性及运行速度均有大幅提升,具有一定的优势。     

基于多媒体融合的图像检索系统的实现

提出一种融合了文本、语音、图像等信息特征的图像检索方案,并以MATLAB为平台构建了一种基于语音识别技术的新型图像检索系统.与基于文本或基于内容的图像检索系统相比,该系统既提高了检索性能,又使得人机交互更加便利.     

基于内容的图像检索方法

综述了基于内容检索技术的进展,并对其主要方法如基于颜色、形状、纹理等图像检索技术进行了论述,介绍了几个典型的基于内容的图像检索系统.通过综述指出了今后的研究方向.     

视频检索技术在有线电视监测系统中的应用

本文在简介视频检索技术概念、关键技术和基于内容的图像检索常用算法的基础上,介绍视频检索技术在有线电视监测系统中的应用,包括系统功能、工作原理和图像比对原理等,以及在视频检索系统实施应该注意的问题.     

基于内容的图像检索系统设计

本文在分析了基于内容的图像检索技术有着广泛的应用前景后,对基于多特征的图像检索方法进行了初步的研究,简单的介绍了系统需求分析,图像检索系统的设计要素及系统的评价方法。     

用CORBA技术构建分布式图像检索系统

首先针对现有Web图像搜索引擎设计的局限性,提出了分布式系统集成的重要性.然后,对CORBA技术进行了详细的描述,说明了CORBA技术是构建分布式图像检索系统的理想平台,并且介绍了图像检索技术.最后,提出了一种基于CORBA技术的分布式图像检索系统设计模型,并详细描述了其体系结构.     

用CORBA技术构建分布式图像检索系统

首先针对现有Web图像搜索引擎设计的局限性,提出了分布式系统集成的重要性.然后,对CORBA技术进行了详细的描述,说明了CORBA技术是构建分布式图像检索系统的理想平台,并且介绍了图像检索技术.最后,提出了一种基于CORBA技术的分布式图像检索系统设计模型,并详细描述了其体系结构.     

一种基于本体的语义检索设计与实现

基于语义检索的目的,结合成语典故本体的构建,设计了一个基于成语典故本体的语义检索模型,阐述了检索模型中用户界面模块、数据存储模块、查询分析模块和检索分析模块的功能;分析了系统中的本体构建技术、分词技术及检索技术,设计并实现了词语相似度及概念相似度算法;通过语义检索系统的实验,得到较高的查全率和查准率.     

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.     

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.     

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.     

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.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

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.