Classification is a core problem in data mining and machinery learning. Nowadays data are usually multi-dimensional, which contain so many properties. However, some properties may be redundant and interfere with the correct and clear decisions. In order to obtain the maximum classification precision, it is so important to select the proper decision tree in the process of classification of decision tree. The common methods of decision property selection include relevant analytical method, componential analysis methods and so on. This paper analyzed the method of property reduction about rough theory and applied it to decision tree, which can produce multiple choice problems of relative reduction.

　From the Fiber-Optic communication appeared to now，The Fiber-Optic communication endless new technology will become the source of market recovery，But the human communication capacity requirement will be endless motive force of the market recovery，In the information society，will play very important role．This paper analyzes the current situation of Fiber-Optic communication technology describes and discusses the future of optical communications technology trends．

With the development of the network technology and intelligent buildings，the works on the PDS (Premises Distribution System)has a fairly high demand．PDS is the basis and nerves of the information system，and also the part of entire network system．This paper studies the PDS from the perspective of standards and designs．

The essay discusses the disadvantages of traditional personnel management system and introduces the latest development of the application technology platform ASP．NET and three-tier framework design system which are introduced into the design and development in University personnel management system．It also analyses the functions and characteristics of the personnel management system and a detailed discussion of the three-tier framework on University personnel management system design and implementation is also included．In the end，it summarizes the benefits of the application in three-tier system development procedure．

In this articles the bisic principle of BPSK direct-sequence spread-spectrum system receiver is studied．with modulation of BPSK．A design scheme of BPSK direct-sequence pread-spectrum system receiver is proposed． the simulation model based on Matlab /Simulink is built．Based on Simulink tools，the simulation result of BPSK direct-sequence spread-spectrum system receiver is implemented．Finally，the original signal of the receiver is got．

Introduces a model based on circuit-switched GSM network wireless remote control system； describes in detail the composition of a remote control receiver；shows the work process and the use of operation．A remote control transmitter can be used with an ordinary GSM mobile phone，without any change．Mobile phone features are not affected，therefore，an original GSM mobile phone can be used simultaneously．This remote control system uses the second mode of operation．Remote distance can be up to GSM network coverage area．

In this paper we present a template-based customization method for animation，and carry out a user-friendly animation system．Using the template system to animating a character，we don’t have to do operations on the model directly，but control the parameters on the user panel．The animation template is a biped walking motion under normal condition that defined by the script language．We aim to attach the general walking pose to any bipe skeleton model and modify the style of walking poses，for example，modify the stride，velocity，and the arm swing extent．

To solve difficult point of exists in practical use， specific applications of exists are studied． By actual case study analysis，how to design correctly SQL query statements with exists is summarized according to actual meaning in SQL Server 2005 environment．

This paper introduces the AES (Advanced Encryption Standard) Algorithm，as well as the correlative concept and basic operation of finite-field．AES encryption algorithm module is an important part of security system, its core mission is to encrypt the data．AES block cipher algorithm is widely used in research and development modules for its high efficiency，low overhead，simple features such as the current password．

Along with computer and communication technologies gradually matured，the staffs’woking efficiency has been improved by the online enrollment system，it is convenience for the students to select the course．At present，many schools use paper signature for students selecting the course or direct transmit studens’ grades that the system without code online．This paper uses a digital signature technology，B/S architecture approach to ensure system data integrity while ensuring data confidentiality，authenticity，non-repudiation，etc．The system can achieve the functions of the students’ select the course management，curriculum management，teachers’ the management of the elective course’grade，public and private keys management，signature verification and so on．

Xtras is widely applied in the multimedia manufacture. Flexibl use of Xtrasy can make the picture vivid，and makes the Authoreware multimedia software of high level．

With the operating principle of DHCP service used as the example，describes the application of Packet Tracer simulator in theory education of computer network，and also discusses the application of Packet Tracer in practical education of computer network and students’ extracurricular studies．

The essay discusses the disadvantages of traditional personnel management system and introduces the latest development of the application technology platform ASP．NET and three-tier framework design system which are introduced into the design and development in University personnel management system．It also analyses the functions and characteristics of the personnel management system and a detailed discussion of the three-tier framework on University personnel management system design and implementation is also included．In the end，it summarizes the benefits of the application in three-tier system development procedure．

Nowadays，the system which bases on multi-layered is increasingly popular．The MIDAS technology of Delphi is a good tool of developing multi-layered system．This paper introduces MIDAS technology and its advantages，which applied in development of three-tier architecture library information management system．

The paper proposes the hierarchical strategy of computer course teaching from the object of teaching，teaching objectives，teaching content and teaching evaluation. Then it does the research and obtains the practical results．

The concept of automation production has played a great role in the revolution of mechanization, electrification and information．This paper discusses the combination of computer software and electrification from the characteristics of electrical software and the application of computer software in electric, which has certain directive significance．

With the rapid development of computer network application，in order to better achieve the object on cultivating the high quality computer network specialty in higher vocational schools，we should implement the scientific outlook on development，and constantly strengthen the research and practice in the aspects of teaching aim，experiment and training， skill cultivation，technical certification and engineering practice，as well as the construction of teaching materials and front line subjects．

Nowadays there are a wide variety of multimedia courseware authoring softwares，so it’s difficult and an urgent task to find a suitable and efficient one．This paper presents an analysis of widely used soft wares for multimedia CAI authoring，discusses features of different soft wares，and thus suggests the choice of proper soft ware that can be applied in teaching．

This article introduces how to apply ASP active wetpage technology to develop personal website．It adopts ASP technique and the database of SQL Server2005，making a whole analysis on personal website，definiting the feasibility of systems and user requirements，planning and design system function module，thereby，personal website base on ASP have better network platform and interaction．