一种基于证书的登录控制实现

实施建立一套较好的登录控制机制,能够为用户提供统一的信息资源认证访问入口,建立统一的、基于角色和个性化的信息访问、集成平台。通过实施单点登录功能,使用户只需一次登录就可以根据相关的规则去访问不同的应用系统,提高信息系统的易用性、安全性、稳定性,并在此基础上进一步实现政府、企业用户高速协同办公。     

基于Novell AM的单点登录设计与实现

随着信息化建设横向集成的推进,对用户身份信息进行统一认证和为用户提供单点登录访问方式的必要性日益提高,如何实现统一认证和单点登录是信息化建设的重要课题。Novell AM是Novell公司提供的统一身份认证解决方案,它通过反向代理、自动填表等技术实现信息系统的单点登录,为企业建设统一认证提供了切实可行的一种方案。     

铁路企业统一身份认证平台的设计与实现

针对铁路企业工作人员使用多个应用系统需要同时记忆多套用户账号信息的现状,文中基于铁路统一用户管理系统的用户数据,设计了一种铁路应用系统用户的统一身份认证系统。该系统采用单点登录、Token、Cookie、Session共享等技术,实现了用户信息与应用系统的分离、统一用户管理、统一认证、一处登录、处处共享等功能,从根本上解决了不同应用系统重复维护用户信息的问题,使用户能够更便捷地访问不同的应用系统,并保证了不同应用系统间用户信息的一致性、安全性和共享性。     

基于J2EE Web服务的统一身份认证系统的设计与实现

基于单点登录技术,构建一个统一身份认证服务平台,有效地整合校园网络中所有的应用系统和资源为目的。采用模块化的方法对系统各个功能模块进行详细设计,然后采用MyEclispe开发平台、tomcat 5.5为服务器、J2EEWeb设计语言、MVC开发模式实现本系统,结合统一身份认证系统整体设计思想,设计统一身份认证系统。实现用户的一次登录,可以访问整合校园网络中所有系统和资源。提高系统管理效率和安全性。     

基于用户映射的CAS单点登录系统设计与实现

随着信息化进一步发展,企业应用系统越来越多。用户每使用一个系统时都必须登录一次,给用户带来不便,而单点登录机制能很好的解决这一问题。本文介绍一个基于用户映射的单点登录系统的设计与实现,系统采用CAS实现统一用户认证,为用户登录多应用系统提供统一的入口,实现基于LDAP的人员组织架构管理,并通过用户映射机制实现多应用系统的整合。     

基于SSL VPN单点登录在区域卫生信息平台中的应用

单点登录是近年来在开发大平台信息系统中出现的一门新兴技术,文章结合作者在开发岳阳楼区基于健康档案的区域卫生信息平台的实践,提出了单点登录技术与SSL VPN技术相结合的基于SSL VPN单点登录技术,为整合多种医疗业务应用系统提供了一个统一身份认证、统一用户管理、统一授权管理、统一资源管理和单点登录平台.     

门户网站的统一认证与单点登录技术

随着中国移动门户网站以及面向公众的各业务平台的发展,用户对门户网站和各业务系统互联网访问越来越频繁。为了提高用户的感知,需实现在两级门户网站、门户网站与各级业务平台进行统一认证鉴权,实现用户的单点登录。本文介绍了门户网站的统一认证与单点登录的关键技术、组网结构、业务流程等。     

基于Web的校园网统一身份认证系统的实现

本文提出了一个基于．NETPassport认证机制的统一身份认证系统,本系统利用Windows2003系统自带的ActiveDirectory组件建立目录服务数据库和SQLServer数据库,实现用户信息、组织架构和角色的统一管理,利用．NETWebService技术实现用户单点登录,实现用户统一身份认证,为数字化校园建设提供了技术参考。     

基于Cookies的单点登录系统的设计与实现

在多应用系统组成的园区网中,如何实现术同应用系统中用户身份的统一管理成为研究的重点。文中分析了统一身份认证中匿名用户和认证用户的访问特点,利用单点登录和URL（统一资源定位地置）重定向技术构建了身份认证框架,并对涉及的关键技术和实现方法进行了研究,最后以ASP（应用服务器提供者）为开发环境给出了软件实现方法。     

基于改进的SAML单点登录系统设计与实现

单点登录(Single Sign-on,简称SSO)是一种用户只需登录一次就能够访问所有互相信任的系统。针对传统的单点登陆流程复杂、缺乏灵活性以及效率低的不足之处,提出了一种在SAML的基础上的单点登录的改进型模型,这个模型基本解决了用户跨域访问单点登录问题,具有很好的安全性和普适性。依据改进后基于SAML单点登录的模型,设计了符合SAML2.0规范的单点登录系统,系统采用模块化的思想,给出并实现了一个基于上述改进模型的单点登录系统。最后通过系统实例表明,该系统减少了验证用户声明的通信,提高了工作效率和系统的安全性,在电子商务、电子政务等多应用系统中具有非常好的应用前景。     

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.     

Nanoimprint Lithography -A Next Generation High Volume Lithography Technique

IntroductionNanoimprint Lithography is a well-acknowl-edged low cost, high resolution, large area pattern-ing process. It includes the most promising methods,high-pressure hot embossing lithography (HEL) [2],UV-cured imprinting (UV-NIL) [3] and micro contactprinting (m-CP, MCP) [4]. Curing of the imprintedstructures is either done by subsequent UV-lightexposure in the case of UV-NIL or by cooling downbelow the glass transition temperature of the ther-moplastic material in case of HEL…     

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.     

Influence of PVK ： NPB hole transporting layer on the characteristics of organic light-emitting devices

A doping system consisting of NPB and PVK is employed as a composite hole transporting layer （CHTL）. By adjusting the component ratio of the doping system, a series of devices with different concentration proportion of PVK ： NPB are constracted. The result shows that doping concentration of NPB enhances the competence of hole transporting ability, and modifies the recombination region of charge as well as affects the surface morphology of doped film. Optimum device with a maximum brightness of 7852 cd/m^2 and a power efficiency of 1.75 lm/W has been obtained by choosing a concentration proportion of PVK ： NPB at 1：3.     

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.     

Analysis of error performance on Turbo coded FDPIM

Due to variable symbol length of digital pulse interval modulation（DPIM）, it is difficult to analyze the error performances of Turbo coded DPIM. To solve this problem, a fixed-length digital pulse interval modulation（FDPIM） method is provided. The FDPIM modulation structure is introduced. The packet error rates of uncoded FDPIM are analyzed and compared with that of DPIM. Bit error rates of Turbo coded FDPIM are simulated based on three kinds of analytical models under weak turbulence channel. The results show that packet error rate of uncoded FDPIM is inferior to that of uncoded DPIM. However, FDPIM is easy to be implemented and easy to be combined, with Turbo code for soft-decision because of its fixed length. Besides, the introduction of Turbo code in this modulation can decrease the average power about 10 dBm, which means that it can improve the error performance of the system effectively.     

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.     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.