基于.NET的身份验证和角色授权模型的研究与实现

为了提高用户身份认证和授权管理的灵活性，从Web应用系统的安全性角度出发，讨论了一种在．NET Framework下保证应用程序安全性的身份验证和授权模型，并给出了模型的具体实现方法。该模型利用Forms身份验证方法对用户的身份进行鉴别。在授权处理上，模型结合统一资源定位（Uniform Resource Locator，URL）授权模式和用户所具有的系统角色，分别从页面级和页面操作级对用户的访问进行控制。该模型在企业局域网环境内能够提供比较灵活的身份认证和基于角色的授权服务。实际应用表明，基于该模型的Web应用系统能够对用户的访问进行有效的控制，从而保证了系统的安全性。     

下一代的V B走向哪里

作为比尔@盖茨以及众多开发人员挚爱的开发工具,VB已经经历了很多次的改进,其目的就是使VB能更简单快捷地用于设计、编写和调试出优秀的面向对象的应用程序. 随着VS.net即将推出,下一代的VB也将做为其中一部份推出.它较以前的版本会有哪些改进呢? 下一个版本的VB主要有以下三方面的改进:Web Forms、Web services和面向对象的语法方面的改进.Web Forms使得经验丰富的VB用户可以像现在编写单机程序一样简单地开发网络应用程序.通过SOAP接口,Web services让你在可以联网的任何地方配置你所设计的组件.另外,几个在面向对象的语言方面的关键性的改进使得VB的代码像C++一样具有灵活性.     

基于AJAX的异步Web开发模式

随着Web应用开发的不断深入和普及,基于互联网的应用程序越来越多,现有网络应用程序中的请求-处理-等待模式越来越不适应用户需求,页面重载成为Web开发应用中最大的可用性障碍。AJAX设计模式的出现,实现了平滑滚屏互联网应用。在这种模式下,各种Web应用程序互相配合,能使网站无缝运作。提出利用AJAX异步机制实现Web应用程序开发,Web页面不用打断交互流程进行重新加载就可以动态更新。使用AJAX,可以创建接近本地桌面应用的、直接的、高可用的、更丰富的、动态的Web用户接口界面,极大地改善了Web应用的可用性和用户的交互体验。     

基于XML的Web信息筛选器的设计与实现

为了给用户提供有效信息,能够根据用户的需要对Internet上的网页信息进行获取和过滤,设计了一个基于XML的Web信息筛选器。系统利用了XML作为中间数据的数据交换技术将Microsoft.NET技术、数据库技术与XML技术相结合设计并实现Web服务程序。采用在Web服务和客户端应用程序之间使用基于XML的存储和访问技术进行数据交换与处理的实现方法,构建了一个基于XML的Web服务,进行解析并过滤多余的信息,将解析后有用的信息结果返回给请求数据的客户端,实现为用户提供特定信息的服务。     

用PAM提升Linux服务器安全

在Linux服务器中，如何保证只有通过严格身份验证的用户才可以在指定的时间内访问指定的应用程序或服务？如何保证通过某种身份验证的用户只能使用指定的系统资源？     

基于.NET平台的可视化Web应用程序工作原理的研究

可视化Web应用程序开发工具的出现极大地提高了Web应用系统的生产效率。基于此,对.NET平台上的可视化Web应用程序开发工具原理进行了分析,介绍了其事件驱动Web应用程序的开发模式;对其实现可视化开发的几个关键技术,如Web页面设计可视化、页面状态的自动保存和恢复、浏览器端事件的捕捉和自动提交等关键技术的实现原理进行了分析;对Web程序的处理流程进行了描述,进而解释了其如何实现Web应用程序的可视化开发。     

基于ASP.NET的Web应用程序安全性的探讨

目前网站的绝大部分资源对浏览者是开放的,但有些信息是特别针对某些用户的,只有特定权限的用户才能访问,因此,Web应用程序安全性便是热点研究问题.介绍了基于ASP.NET的Web应用程序安全性的验证、授权和模拟等处理程序的实现技术与方法.     

基于Linux系统嵌入式Web的研究

基于厂站终端与用电信息采集系统之间的通讯以网络通道为主,在任何有网络的地方,实现对厂站终端进行实时监控和管理,提出通过Web页面形式访问厂站终端的技术。利用Boa构建了基于Arm-Linux操作系统的嵌入式Web服务器,提出了交互式用户应用程序的设计方法,实现嵌入式Web信息发布。     

基于ASP.NET的Web应用程序安全性的探讨

目前网站的绝大部分资源对浏览者是开放的,但有些信息是特别针对某些用户的,只有特定权限的用户才能访问,因此,Web应用程序安全性便是热点研究问题。介绍了基于ASP.NET的Web应用程序安全性的验证、授权和模拟等处理程序的实现技术与方法。     

计算技术与计算机及网络设备 应用程序、专用程序、实用程序

0627609基于SOA的应用程序框架研究与实现〔刊,中〕/王滨//计算机工程与设计.—2006,27(7).—1198-1200,1207(L)0627610基于Web服务的应用程序集成的研究〔刊,中〕/曾宇//计算机工程与设计.—2006,27(2).—297-299,343(L)企业各系统当中各个应用程序的集成是企业应用集成(EAI)中的一个层次,对于应用程序的集成也存在着多种方法。通过比较与分析,提出一种用Web服务的方式来对应用程序的功能接口进行封装,使得异构的应用之间能够共享数据和功能,从而实现应用之间的松散耦合集成的方案架构,同时分析和总结该方案的特点,并对其前景做出预测…     

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.