用户信息

To network information products provider, he not merely wants to reduce the product cost of information, contain the pirate behavior effectively, strengthen anti-counterfeit to innovate , should carry on the signal to convey, announcing product quality to users, the ones that are especially worth mentioning will establish one's own brand and setting-up prestige mechanism, solve the " lemon " problem in the information products trade of the network through mixing and trussing up the way of selling etc..

对于网络信息产品提供商来说，他不仅要降低信息产品价格，有效遏制盗版行为，加强防伪创新，并要进行信号传送，主要指通过广告方式，向用户揭示产品质量，特别值得一提的要树立自己的品牌和建立信誉机制，通过混合捆绑销售等途径来解决网络信息产品交易中的"柠檬"问题。

You will use your e-mail address / password combination to access your account, it is your responsibility to keep this information confidential, you may change this information by logging into your account and following the User Account Info.

"您将使用自己的电子邮件地址/密码组合来访问您的帐户，您有责任保持这些信息保密，您可以更改登录到您的帐户，并按照"用户帐户信息此信息。

The core of all behavior is to communicate between person and person, and to Internet character, IM is the directest communication way between person and person, can make the relation between person and person is built more quickly, of information deliver directer also quicker, raised an user to get the efficiency of information greatly thereby, reduced information to get cost.

人与人之间一切行为的核心是沟通，而对互联网而言，IM是人与人之间最直接的沟通方式，可以使人与人之间的关系更迅速建立起来，信息的传递也更直接更快捷，从而大大提高了用户获取信息的效率，降低了信息获取成本。

By the automatic categorization, web pages is distinguishingly created into corresponding data bases according to category info, which improve recall and precision ration of Chinese search engine. In the meantime, automatic categorization info resource is established to provide category message catalog for users. In addition, the quality of automatic categorization in some measure has positive effect upon sequent relativity sort process.

通过自动分类不仅仅可以将网页按照类别信息分别建立相应的数据库，提高中文搜索引擎的查全率和查准率，而且可以建立自动的分类信息资源，为用户提供分类信息目录，并且，自动分类的好与坏，对后面的相关性排序过程也有一定的积极作用。

This thesis deeply researches the J2EE security strategy on the application tier of enterprise system. The security strategy predigests the information security model and meets the security requirements expediently. But there are some disadvantages when the security requirements become more complex. The expositive security on the Web-Tier can not offer more information for authentication; there is no authentication for EJB-Tier to use, make the EJB-Tier depend on the Web-Tier; J2EE uses database or application server to manage the role information. Use database to manage the role information will increase the complex of enterprise application, and the way of application server will reduce the ability of migrate other J2EE platform. To solve these problems, the thesis designs an improved security strategy model.

本文从企业级系统应用层安全的角度出发，深入研究J2EE多层体系结构的安全策略模型。J2EE提供的安全策略简化了系统的信息安全模型，能够很方便地满足基于J2EE的分布式应用系统的安全需求，但是在面对更加复杂的安全需求时，J2EE安全策略在验证授权和角色管理中还存在不足之处：其在Web层的声明式验证机制无法为用户提供更多验证信息，可扩展性较差；在EJB层缺少业务逻辑层可供采用的验证机制，而是借助于Web层的验证机制，其耦合程度较高有悖于业务逻辑分离于表现逻辑的原则；在角色管理方面，J2EE采用数据库或者应用服务器来管理角色信息，其中，数据库管理角色的方式增加了应用开发的复杂度，应用服务器管理角色降低了系统的可移植性，两者都具有片面性。

With the market competition turning worse and the custom requirement being of diversity, presenting enterprise information system must be capable of adapting all variances. If the enterprise information system has no good flexibleness and could not customize, or second-hand develop, it will become the fetters of enterprise development.

随着市场竞争的加剧和客户需求的多样化，现在的企业信息系统必须具有适应各种变化的能力，如果企业信息系统没有良好的柔性，不能方便地进行用户化和二次开发，那么这样的信息系统反而会成为束缚企业发展的枷锁。

Considering the limits of RDSS in active positioning mode,such as poor security,limited capacity,and inability to continuously provide position,velocity and attitude outputs,a technique of tightly coupled RDSS /SINS integrated navigation system is proposed for land vehicles by utilizing the time differenced carrier phase of 3 geostatic satellites.

针对北斗系统有源定位方式保密性差、用户数目有限，不能提供连续的位置、速度、姿态信息的问题，提出利用北斗系统3颗地球静止卫星的载波相位时间差分信息，与车载捷联惯导构成紧组合导航系统，通过扩展卡尔曼滤波器估计并修正惯导系统的速度误差；引入载体的侧向和天向速度约束，改善了速度估计精度；结合北斗系统的伪距信息，消除了长航时条件下位置误差的积累；推导了滤波器观测方程，对组合导航滤波器进行了设计；通过车载实验进行了验证，实验结果表明，速度误差和位置误差的积累受到了有效地抑制，精度满足陆地战车导航的要求。

With the rapid increasement of internet information, it is becoming more and more important and difficult how to acquire information users need quickly and efficiently in Internet.

随着Internet信息的日益剧增，如何从Internet网上的海量信息中，迅速、有效地获取用户所需要的信息，是亟待解决的问题，也是目前研究的热点和难点。

Student Information Management System is an educational unit indispensable part of its contents for the policy mand school administrators, are of the utmost importance, so students information management system for the user should be able to provide adequate information and efficient means of inquiry .

学生信息管理系统是一个教育单位不可缺少的部分，它的内容对于学校的决策者和管理者来说都至关重要，所以学生信息管理系统应该能够为用户提供充足的信息和快捷的查询手段。

Correct makes the law forms the good personal hygiene habit, sufficient sleep, attendance in exercise, reduced pressure, enough nutrition; The attendance washes the hands, after particularly has contacted the public goods, must wash the hands first touches own eye, the nose and the mouth again; Sneezes and cough time should use the paper goods to cover the oronasal; The indoor maintains ventilates and so on.

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According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。