Construction of web-based learning community promotes the staff communication and cooperation between enterprises and school．It not only solves the problem of employees to continue learning，and it can make the higher vocational teachers know the needs of enterprises and the business experience．It realizes resources sharing，experts leading，mutual interaction of students，harmonious development．It gets to the goals of the development and enhancement of enterprises and school．

Self—nonself recognition model has the inherent weakness．In danger theory，sanger is the aim for recognition，so the problems in self—nonself recognition can be successfully avoided．Cloud model is an effective tool in transforming between qualitative concepts and their quantitative expressions．This paper uses the concept or cloud model to estimate systematic parameters and consequently presents the definition of danger signa1．Stimulate model including both self-nonself recognition method and danger recognition method is presented．

As a practical soft of electronic design，grasping and using Multisim skillfully will facilitate electronic designers．This article describes its application in the directions of design skills and common faults，which is helpful for the designers when designing．

This paper introduces the GPON system structure briefly, and analyzes the technical characteristics of GPON, and discusses the principle of GPON network construction.

Distributed system is formed by a large number of independent computers through the network．A good communication mechanism is very important when cooperation processes access distributed resources through the network．The article discusses the working mechanisms of remote procedure call (RPC) and remote method invocation (RMI)，and displays the working mechanisms through a simple example based on the．Net platform and Socket communication protocols．

It is possible that spatial information integrates into social life applications as the rapid development of spatial information technology．G/S model is a new network service model of spatial information．This paper expounds a preliminary theory for analyzing behaviors of remote vehicle，which is based on G/S model and third-generation mobile communication technology (3G) and realizes the application in the system of intelligent vehicle scheduling．It gives a test case of the system at last and validates its feasibility．

We propose a maximum entropy-based method for automatic identification of prepositional phrase， which focuses on multiple error identification problems on the right boundary of prepositional phrase．It combines the dependency grammar knowledge of prepositional phrase boundary．In the process of recognition，firstly，we apply maximum entropy to identify prepositional phrase，then fine-tune the results with dependency grammar knowledge generated by dependency treebank．It improves the recognition rate of prepositional phrase．

E-mail is the main way of communication for enterprises to exchange information．Therefore e-mail archiving system appears and becomes a new standard for the qualification construction of a corporate due to the control of enterprise internal management and legal requirements of preservation of the message data．The paper analyzes the key technologies of the e-mail archiving technology of MS-exchange server and points out the advantages and disadvantages of all kinds of the archiving technologies．The methods is applied in some fund companies and approved to be effective．

Different wavelet basis has different frequency characteristics．The result of a question will be different with different wavelet basis．Therefore，the application of wavelet analysis on the selection of wavelet basis is critical．This paper details the principle of wavelet transform and chooses the wavelet basis function， depending on the application needs to use the corresponding wavelet basis function．

Multimedia network classroom that contains multimedia technology and network technology makes chang in the teaching means，teaching methods and teaching structure．These paper introduces the application of multimedia electronic classroom in the teaching of Linux OS，using intelligently Teaching and Learning with Computer( iTALC ) as example．

Traditional collaborative filtering algorithms ignores the change of the user interest，which affects the quality of recommendation in a certain extent．This article introduces time-based data weight，and researches on the collaborative filtering technology based on the change of user interest．Experimental results show that this technology can discover the change of user interest timely，and improve the system recommendation quality．

This paper introduces the enterprise efficiency control mechanism，analyzes the current telecom enterprise efficiency mechanism of control problems，puts forward compose to build scientific and reasonable working aging mechanism of control method．The method can effectively help the telecom operators to enhance work efficiency，to improve execution and provide reference of timeliness control building and development for the telecom enterprise．

According to the lag potential of electromagnetic theory，this paper establishes current distribution of moments equations for any length chaff scattering field．It obtains the concrete algorithm of current and RCS distribution by means of multi-zone basing point apolegamy．By the emulation analysis of MATLAB，it proves the correctness and rapidity of algorithm，which is of high engineering use-value．The result of the emulation analysis is in accordance with those previous test results．

Cloud computing is the revolution of information industry operation pattern，which has profound influence on the electronic commerce operation mode．This article describes the cloud computing and electronic commerce security requirement and analyzes how to deal with the opportunities and challenges of the Cloud computing to the future of e-commerce．

With the rapid development of the software industry，JAVA is applied more and more widely in business software．This paper discusses the connotation of the EJB、EJB roles and the EJB architecture and the difference between JavaBeans and EJB．

The computer laboratory of higher vocational college is usually equipped with hard disk protection system，which has two protection modes including hardware protection and software protection．Compared to software protection，the lab using hardware protection old computer is easier to meet with faults， and can not find the hardware，often need to reset the BIOS．This paper expounds using the hard disk protection module of software protection mode used in exiting microcomputer laboratory to change the hard disk protection mode in old computer lab，providing reference for the management and maintenance of vocational college computer laboratory．

This article mainly introduces the basic composition and function of the satellite video conference system，as well as some of the major equipment operation and the handling of common faults．