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ASP.NET的数据验证技术研究

编写Web应用程序时,需要判断数据的有效性和安全性,只有经过验证的数据,用户才能把信息保存下来或进行下一步的处理。在基于ASP.NET技术的Web应用程序开发中,通过对Web窗体等几种常用数据验证的研究,以及开发对象成员数据验证组件来进行数据验证的研究,可以更深地理解数据验证技术,以保证程序的安全性和存储信息的正确性。     

Web应用中缩短Web响应时间的技术研究

缩短Web访问中的用户感知时间,提高网站性能是Web应用程序开发中一个极为重要的问题。从软件处理数据的角度出发,针对Web应用程序的特点,从优化数据访问以及Web数据显示2个方面分别讨论如何缩短Web数据响应时间,以达到缩短用户感知时间的方法。并利用ACT测试工具对进行测试,并给出了这些方法的实际应用测试数据。验证本文所提出的方法能极大地优化Web应用程序的应用,有效地缩短用户的感知时间。     

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Forms身份验证研究与实现

通过对ASP.NET提供的Forms身份验证方式的特点和工作原理进行分析,研究了在Web应用程序中实现基于XMIL的Forms身份验证步骤;利用存储在XML文件中的用户凭证信息,实现Web应用程序对拒绝匿名访问资源进行Forms身份验证程序的设计.实例说明,采用基于XMI.的Forms身份验证方式,既可以大大简化Web应用程序中用户身份验证模块的设计,也可以方便灵活地应用于Web应用程序中.     

探讨如何应对基于PHP技术开发的Web应用程序漏洞

目前在网络技术开发当中已经广泛应用Web应用程序,然而该程序在应用期间存在漏洞问题,因此需要借助PHP技术为Web应用程序提供服务端脚本语言,全面加强网络信息安全性。此次研究主要分析了Web应用程序漏洞问题,并且研究了PHP文件上传技术的应用,在此基础之上提出避免文件上传漏洞的有效措施,希望可以为Web应用程序的开发研究提供重要依据。     

Ajax对Web应用程序安全的影响

Ajax是一个相对年轻的技术,Ajax的广泛应用,给Web应用程序的安全性带来了新的挑战。论文探讨了Ajax技术对Web应用程序安全性的影响,并阐述了如何尽可能地减少其对安全的负面影响。之后又进一步探讨了脚本客户端和服务器端建立安全连接的三种方式,并做了比较和分析。     

免受HTML共享所造成的攻击

许多Web应用程序都拥有一个文件共享特性,准许Web用户将文件上传至文件库,或从文件库中下载。被共享的文件包括HTML文件和脚本的其他文件,浏览器可能要执行这些文件。这就向大量的“跨用户攻击”打开了大门,这些攻击可能包括以前用户的攻击,甚至包括虚拟应用程序某个实例的一个用户针对同样应用程序的不同虚拟实例的攻击。这种攻击实质上是XSS攻击,但通常针对XSS的防御却无法发挥作用,因为很难清除共享文件中的有害“分子”。     

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。     

基于.NET框架体系系统安全研究与设计

文中针对利用基于.NET框架系统结构下Web模式应用程序系统进行Web开发时容易出现的一些安全问题进行分析和讨论,对应于所讨论的系统安全问题相应的提出一些安全问题的预防方案,避免升级计算机硬件配置的方法和途径,从而减少系统安全费用并且还能提高开发系统的可靠性和稳定性及安全性.虽然.NET框架体系自身有一些安全保护机制,但用户在开发Web模式应用程序时为避免安全隐患,还是应该在各个环节都做好更为可靠的安全设置.     

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.