计算机科学

洪学海许卓群丁文魁

计算机科学. 2003, 30 (8): 1-5.

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Grid computing is a new kind of distributed computing technology and computing environment ,and also an attentive hot point of information technology in the world. It launches a space for new generation internal application,due to its supporting the co

XML数据库技术研究

秦杰杨树强窦文华

计算机科学. 2003, 30 (8): 6-9.

摘要 ( 78 )

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XML database is a new database technology. This paper gives an overview about the last research about XML database and its related productions ,then comparing XML database with traditional RDBMS. We analyze and point out some weaknesses about XML databa

信息过滤技术研究

毛颖周源远王继成张福炎

计算机科学. 2003, 30 (8): 10-12.

摘要 ( 92 )

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As the rapidly growing information on Web, information filtering techniques have been more and more widely used. This paper introduces two main filtering methods ,named content-based and collaborative filtering; con-trastively describes the key techniq

信息检索的概率模型

邢永康马少平

计算机科学. 2003, 30 (8): 13-17.

摘要 ( 86 )

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The study of mathematical models on information retrieval is an important area in the Information Retrieval community. Because of the uncertainty characteristic of IR,the probability model based on statistical probability is apromising model from recen

自动文本分类中的智能处理技术

孙晋文肖建国

计算机科学. 2003, 30 (8): 18-20.

摘要 ( 71 )

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Text automatic classification has become an important technology along with development of Internet and the increment of information ,because of the complexity of text ,it is very difficult to achieve better effect only depend-ing on the different class

DNA分子计算模型

李燕王秀峰

计算机科学. 2003, 30 (8): 21-23.

摘要 ( 83 )

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The field of practical DNA computing opened in 1994 with Adleman's paper,in which a laboratory experi-ment involving DNA molecules was used to solve a small instance of the Hamiltonian Path problem. The characteris-tic of this computation is its powerfu

安全协议的形式化描述和分析

宋震张艳李舟军陈火旺

计算机科学. 2003, 30 (8): 24-27.

摘要 ( 65 )

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Security protocols use cryptography system to complete the tasks of principal identity authentication and seccion key distribution. The correctness of security protocols is of vital importance to ensure the security of the Inter-net application. Formal me

预取技术研究进展

曹新平刘美华韩真古志民张建鑫

计算机科学. 2003, 30 (8): 28-30.

摘要 ( 69 )

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World Wide Web(WWW) services have grown to levels where significant delays are expected to happen.Technology like prefetching are likely to help users to personalize their needs ,reducing their waiting times. This paperfirstly describes the architecture

基于Internet的路由策略研究综述

贺红袁胜忠马绍汉

计算机科学. 2003, 30 (8): 31-33.

摘要 ( 75 )

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Routing protocol is one of the kernel technologies of the Internet. The swift and violent development of the Internet enables the study of routing protocols to be an important research direction of computer science. This papershows opening problems in

异构网络协议转换器构造技术研究

赵新有古天龙董荣胜李凤英

计算机科学. 2003, 30 (8): 34-36.

摘要 ( 73 )

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A protocol converter can solve the problem of communication between heterogeneous and distributed com-puter networks. This paper proposes a novel approach to construct a converter for these protocols. This approach in-cludes following steps:getting reduc

一个基于最小割集扩容的网络优化算法

刘玉华毛经中肖德宝

计算机科学. 2003, 30 (8): 37-39.

摘要 ( 83 )

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When designing the topology architecture of a large network,or managing and controlling a run network,the battleneck is always changeable with the increase of the network flow,which must be considered. In this paper ,af-ter analyzing the Ford-Fulkerson

无线局域网技术在校园网中的应用与研究

胡新和尹光辉陈英

计算机科学. 2003, 30 (8): 40-42.

摘要 ( 64 )

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This paper gives some introductions to the relevant techniques and characters of Wireless LAN(WLAN),and associates the techniques with the actual situations of current campus network construction. Meanwhile,this paper provides the solving plan to the re

基于蓝牙的无线校园网接入模式研究

金永贤周家庆

计算机科学. 2003, 30 (8): 43-44.

摘要 ( 78 )

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Bluetooth technique is a kind of close-distance wireless communication standard which has low wastage Using bluetooth technique in campus network can form bluetooth wireless campus network.This paper analyzes topologic structure of bluetooth technique a

入侵检测系统发展的研究综述

张相锋孙玉芳

计算机科学. 2003, 30 (8): 45-49.

摘要 ( 71 )

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With the fast development of Internet,more and more computer security affairs appear. Researchers have developed many security mechanisms to improve computer security ,including intrusion detection (ID). This paper re-views the history of intrusion det

一种基于贝叶斯判决的先进入侵检测模型

罗光春卢显良李炯张骏

计算机科学. 2003, 30 (8): 50-51.

摘要 ( 77 )

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One key problem for intrusion detection system is the correctness and efficiency of detection algorithm.This paper presents a revised detection algorithm through the use of Bayes decision. Bayes decision is a random pat-tern classified recognition method

安全多方计算协议的研究与应用

李强颜浩陈克非

计算机科学. 2003, 30 (8): 52-55.

摘要 ( 82 )

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This paper introduces the current research status of the muhi-party computation protocols,briefly shows the current four types of multi-party computation protocols and summarizes the research direction.

一种基于密钥矩阵的动态秘密分享方案

颜浩陈克非

计算机科学. 2003, 30 (8): 56-58.

摘要 ( 75 )

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In this paper we introduce a dynamic secret sharing scheme. This scheme not only can be used unrestricted times to share and resume different secret without regenerating the information in the users hands,satisfy the (k,n)threshold demand,but also can

数字水印的应用、性质及性能评测

张鸿宾张帆

计算机科学. 2003, 30 (8): 59-63.

摘要 ( 77 )

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The last ten years have seen rapidly growing in the field of digital watermarks. Meanwhile ,a large number of attacks appears as fast as new algorithms are proposed,which emphasizes the limits and weaknesses of those algo-rithms. The tools ,methodologie

基于关系数据库的XML数据管理

万常选刘云生

计算机科学. 2003, 30 (8): 64-68.

摘要 ( 66 )

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Currently,there are a great of research topics that focus on storing and querying XML data in an RDBMS,and publishing relational data as XML documents ,and querying XML views of relational data. An overview of XML data management based on RDBMS is given

基于Schema路径分析的XML数据库存储策略

朱震左春

计算机科学. 2003, 30 (8): 69-72.

摘要 ( 81 )

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With XML standards playing more and more important role at information exchanges in data management,the XML database storing strategy which supports huge amount XML data control from bottom layer of database has become the key part of fields such as con

对象关系数据库管理系统体系结构的研究

李明叶晓俊

计算机科学. 2003, 30 (8): 73-75.

摘要 ( 81 )

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In last years, with the Object-Oriented Programming popular and the field of database application extend-ed,many DBMS manufacturers integrate the object model into traditional Relational Database Management Systems (RDBMSs)one after another ,in order to m

多媒体存储系统的两级粒度方式的设计

刘晓光王刚吴英刘璟

计算机科学. 2003, 30 (8): 76-77.

摘要 ( 69 )

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Multimedia on demand, such as VOD and AOD, have popularized with the development of network tech-nology recently. The Storage systems of multimedia on demand have some special requirements. The two-level granu-larity is a new method to stripe unites in

基于Web的多形态新闻信息发布模型

马路许斌王克宏

计算机科学. 2003, 30 (8): 78-81.

摘要 ( 80 )

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There are a lot of different terminals existed in internet. Each of them has different demand on format and language when it retrieves information. This paper introduces a Web news information publish model with multi-for-mat and multi-language capabilit

电子商务的一种参考模型

刘晖彭勤科沈钧毅

计算机科学. 2003, 30 (8): 82-84.

摘要 ( 69 )

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This paper proposes a six-layers reference model for E-Commerce, including infrastructures, science tech-niques, elementary services ,business strategies ,business modes and society environment layer. Main classifications and some concrete entities in eac

构建数字城市的元数据服务体系

王浒李琦董宝青李浩川

计算机科学. 2003, 30 (8): 85-87.

摘要 ( 66 )

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Metadata is one of the six key technologies of Digital Earth,which is also an important aspect in buildingand implementing the Digital City. Based on the technologies and standards of Web Services ,the author came up witha metadata services architecture

数据仓库的质量管理问题和方法

毛国君

计算机科学. 2003, 30 (8): 88-91.

摘要 ( 83 )

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A data warehouse is often a large-scale information system for an enterprise,so its quality management isimportant and difficult. Recently, some researchers have studied the problems of quality management in data ware-houses from different views ,and achi

数据集成中不一致性数据相似性比较的加权算法

张艳秋徐六通王柏

计算机科学. 2003, 30 (8): 92-92.

摘要 ( 60 )

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Reducing inconsistency is the key problem to improve data quality during data integration. In this paper,we first present a weighted algorithm of similarity coefficient which is superior to traditional algorithms if the source data have multiple charact

基于XML技术的个性化主动信息服务系统关键技术的研究

陈俊杰郭永明宋翰涛陆玉昌余雪丽

计算机科学. 2003, 30 (8): 93-95.

摘要 ( 64 )

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With the rapid development and spread of the Internet technology,there have been significant progresses in the Internet information retrieval and active services. However,with the traditional Internet search engines and activeservices ,which are all base

多播在数字监控系统中的应用

苏士美李海芳

计算机科学. 2003, 30 (8): 96-99.

摘要 ( 67 )

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This paper discusses problems of muhicasting and its application. Two ways are proposed to overcome theproblems of muhicasting according to the architectures of current networks and the functional requirements of asurveillance System. One is that Winsoc

多Agent合作求解

张新良石纯一

计算机科学. 2003, 30 (8): 100-103.

摘要 ( 83 )

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Multi-Agent Collaborative Problem Solving is one basic issue of the research of Multi-Agent System (MAS). In this paper we summarize some research work of Multi-Agent collaborative problem solving,expound the characteristic of Multi-Agnet collaborative

拍卖方法引入多Agent系统

金Xing 石纯一

计算机科学. 2003, 30 (8): 104-107.

摘要 ( 71 )

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Auction, an operational and effective resource allocation method, generally results in economical efficiency allocation between buyers and sellers. As a negotiation method, auction can be used in Multi-Agent Systems. Withthe consideration of computation a

移动Agent系统通信失效问题研究

周竞扬陈韬略许平陆桑璐陈道蓄

计算机科学. 2003, 30 (8): 108-111.

摘要 ( 74 )

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The Mobile Agent is thought to be the popular computing model for the next generation's distributed sys-tem. The mobile agent has the following key features: autonomy, collaboration, security and especially mobility. Agood communication model for mobile

基于JavaCard的移动代理系统安全性研究

陈志贤王绍棣王汝传孙知信

计算机科学. 2003, 30 (8): 112-113.

摘要 ( 61 )

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With wide and increasing range applications of mobile agent technology, the security problem has gotten more and more focus. This paper discusses the security problems that the mobile agent system faces with at presentand the existing protesting schemes

序列关联并行挖掘算法研究

李庆华赵峰

计算机科学. 2003, 30 (8): 114-116.

摘要 ( 65 )

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Ming sequential associations is becoming increasing essential in many scientific and commercial domains Developing parallel algorithm becomes quite challenging depending on enormous size of available dataset and possibly large number of mined associati

一种直接在Trans-树中挖掘频繁模式的新算法

范明王秉政

计算机科学. 2003, 30 (8): 117-120.

摘要 ( 62 )

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Frequent pattern mining plays an essential role in many important data mining tasks. FP-growth is a very efficient algorithm for frequent pattern mining. However, it still suffers from creating conditional FP-tree separately and recursively during the min

区间值属性决策表的数据挖掘

王珏刘三阳张杰

计算机科学. 2003, 30 (8): 121-123.

摘要 ( 63 )

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Data mining in incomplete information systems is a hard problem but inevitable in uncertain decision. In thispaper ,an extended rough set model based on dominance relation is combined with fuzzy set theory for data mining ininterval valued decision tabl

新型SVM对时间序列预测研究

朱家元段宝君张恒喜

计算机科学. 2003, 30 (8): 124-125.

摘要 ( 69 )

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In this paper, we present a new support vector machines-least squares support vector machines (LS-SVMs). While standard SVMs solutions involve solving quadratic or linear programming problems, the least squaresversion of SVMs corresponds to solving a set

支持向量回归中的预测信任度

孙德山吴今培

计算机科学. 2003, 30 (8): 126-127.

摘要 ( 62 )

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Support vector machine (SVM)has been widely applied to classification and regression problems, but it suf-fers from some important limitations, one of the most significant being that it makes point predictions rather thangenerating probability output. A

一种改进的SMO算法

张召黄国兴鲍钰

计算机科学. 2003, 30 (8): 128-129.

摘要 ( 68 )

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In this paper we have pointed out an important source of inefficiency in SMO algorithm that is caused by the operation with a single threshod value. We have suggested modifications of SMO algorithm that overcome the problem by efficiently maintaining an

基于可拓集的决策模型研究

王洪伟吴家春蒋馥

计算机科学. 2003, 30 (8): 130-133.

摘要 ( 55 )

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Decision model for incompatible problems is a difficult issue in knowledge-based systems, which is current-ly being focused by the artificial intelligence and management communities. Extension set is an emerging set theory for solving incompatible proble

贝叶斯学习中基于贝叶斯判别分析的先验分布选取

胡振宇林士敏陆玉昌

计算机科学. 2003, 30 (8): 134-135.

摘要 ( 68 )

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In this paper we propose an experimental method to choose a prior distribution. Different from many re-searchers, who offered lots of principles that separated from sample information, we consider it a Bayesian discrimina-tion problem combining with the s

态势估计的目标编群问题研究

李伟生王宝树

计算机科学. 2003, 30 (8): 136-138.

摘要 ( 76 )

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Problems about target classification in situation assessment are analyzed. This paper presents a synthetic method for fulfilling target classification by using the nearest-neighbor method and field knowledge. The graphical structure formed by target clas

基于神经网络的预测模型中输入变量的选择

杨奎河王宝树赵玲玲

计算机科学. 2003, 30 (8): 139-140.

摘要 ( 61 )

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It is important to select input variables when the neural network forecasting model is proposed. In this pa-per, by using the autocorrelation function on input variables sets selection for neural network forecasting model, a systemic and scienti[ic method

自适应多位变异遗传算法的实现

王基一吴燕仙

计算机科学. 2003, 30 (8): 141-143.

摘要 ( 59 )

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Genetic algorithm is a widely used optimization method. Crossover and mutation are two Basicl operatorsof the genetic algorithm. On the basis of analyzing the principles of simple genetic algorithm and discussing its exist-ing problems of crossover poin

基于粒子系统的建模方法研究

张芹吴慧中张健

计算机科学. 2003, 30 (8): 144-146.

摘要 ( 77 )

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This paper describes the definition of particle system, also discusesses the key techniques and problems of realizing of particle system. It gives a basic frame for applying particle system to modelling irregular objects.

一种新颖的图像水印嵌入方法

胡玉平余胜生周敬利石磊

计算机科学. 2003, 30 (8): 147-149.

摘要 ( 62 )

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An novel embedding method for image watermark based on wavelet transform is proposed. With this method ,the value of each pels is modified directly,so that a bit of watermark information is embedded in every pel-s. Before emeded,the original image is dec

软件恢复技术研究

李正万群丽许满武

计算机科学. 2003, 30 (8): 150-155.

摘要 ( 71 )

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Recently, the phenomenon of "software aging", one in which the state of a software system gradually de-grades with time and eventually leads to performance degradation or crash/hang failure, has been reported. The aging phenomenon is ubiquitous in all ki

基于过程模式的软件过程框架

梁义芝王延章刘云飞缪旭东

计算机科学. 2003, 30 (8): 156-161.

摘要 ( 72 )

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Process pattern is an excellent method to express software process knowledge, it can express process knowledge in different granularity and realize the non-gap connection of process knowledge, it supports the reuse and persistent improvement of process k

软件脆弱性分析

李新明李艺徐晓梅韩存兵

计算机科学. 2003, 30 (8): 162-165.

摘要 ( 69 )

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Software vulnerability is the root reason that cause computer system security problem. It's a new researchtopic to analyze vulnerability based on the essence of software vulnerability. This paper analyzes the main definitions and taxonomies of vulnerabil

基于角色访问控制模型及其在操作系统中的实现

刘伟孙玉芳

计算机科学. 2003, 30 (8): 166-168.

摘要 ( 53 )

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Since Role-based access control shows great advantage in meeting the security need in large-scale, enter-prise-wide system, RBAC becomes the hot topic in access control research area. Researchers have proposed several RBAC models, which include the famou

Linux互斥锁机制的研究及改进

赵慧斌李小群孙玉芳叶以民

计算机科学. 2003, 30 (8): 169-171.

摘要 ( 123 )

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Applications with real-time constraints are not only growing in the field of embedded system, but gaining popularity in the desktop environment as well. At the same time, using an opened source system ,Linux, as the sup-ported OS is more and more appealin

FTDSS：高容错分布式共享存储机制

魏青松卢显良雷宇

计算机科学. 2003, 30 (8): 172-175.

摘要 ( 78 )

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Computerized data has become critical to the survival of an enterprise. Company must have a strategy for recovering their data should data lose. RAID is a popular mechanism to offer good fault-tolerance. But RAID can notwork well when one more disks fail.

基于LogP简化模型的矩阵求逆并行算法研究

陈天麒曾庆华孙世新

计算机科学. 2003, 30 (8): 176-177.

摘要 ( 57 )

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LogP is becoming a practical parallel computation model that meets the demanding of parallel computers and parallel algorithms. So it is important to re-design parallel algorithms on the LogP model. This paper studies the parallel algorithm of computing c

一种基于CPLD的I／O总线驱动液晶显示的方法

程晓东郑为民唐志敏

计算机科学. 2003, 30 (8): 178-179.

摘要 ( 44 )

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The paper discusses a new kind of driving the LCD via I/O bus using CPLD and realizing the precise I/O control timing sequence by establishing the corresponding Verilog-HDL model. The results of application show that this solution can not only solve the m

嵌入式处理器的性能分析方法

盛永杰刘博勤陈章龙

计算机科学. 2003, 30 (8): 180-181.

摘要 ( 49 )

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This paper introduces the architecture of current embedded processors firstly. It focuses on some important factors that affect performance of embedded processor,and proposes some performance analyzing methods. At the lastpart, a generic performance analy

基于VHDL的复杂电路的P—T算法模型

刘丹非李曼义郭金怀

计算机科学. 2003, 30 (8): 182-184.

摘要 ( 46 )

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When we design electric circuit with the hardware describe language VHDL,if the control of the electriccircuit is more than to calculate ,we can design electric circuit as a controller which is based on multiplexer and is di-vided into the space part and