A Review of Data Cleaning Methods for Web Information System

Web information system(WIS)is frequently-used and indispensable in daily social life.WIS provides information services in many scenarios,such as electronic commerce,communities,and edutainment.Data cleaning plays an essential role in various WIS scenarios to improve the quality of data service.In this paper,we present a review of the state-of-the-art methods for data cleaning in WIS.According to the characteristics of data cleaning,we extract the critical elements of WIS,such as interactive objects,application scenarios,and core technology,to classify the existing works.Then,after elaborating and analyzing each category,we summarize the descriptions and challenges of data cleaning methods with sub-elements such as data&user interaction,data quality rule,model,crowdsourcing,and privacy preservation.Finally,we analyze various types of problems and provide suggestions for future research on data cleaning in WIS from the technology and interactive perspective.

Chaining Distributed Geographic Information Web Services Based on Ontology

To solve the problem of chaining distributed geographic information Web services （GI Web services）, this paper provides an ontology-based method. With this method, semantic service description can be achieved by semantic annotation of the elements in a Web service description language（WSDL） document with concepts of geographic ontology, and then a common under-standing about service semantics between customers and providers of Web services is built. Based on the decomposition and formalization of customer requirements, the discovery, composition and execution of GI Web services are explained in detail, and then a chaining of GI Web services is built and used to achieve the customer＇s requirement. Finally, an example based on Web ontology language for service （OWL-S） is provided for testing the feasibility of this method.

Design and Application of an Intelligent Agent for Web Information Discovery

With the propagation of applications on the internet, the internet has become a great information source which supplies users with valuable information. But it is hard for users to quickly acquire the right information on the web. This paper an intelligent agent for internet applications to retrieve and extract web information under user's guidance. The intelligent agent is made up of a retrieval script to identify web sources, an extraction script based on the document object model to express extraction process, a data translator to export the extracted information into knowledge bases with frame structures, and a data reasoning to reply users' questions. A GUI tool named Script Writer helps to generate the extraction script visually, and knowledge rule databases help to extract wanted information and to generate the answer to questions.

An Informetric analysis of web citation in Chinese journals of Library and Information Science in recent years

This paper selects 998 articles as its data sources from four Chinese core journals in the field of Library and Information Science from 2003 to 2007.Some pertinent aspects of reference citations particularly from web resources are selected for a focused analysis and discussion.This includes primarily such items as the number of web citations,web citations per each article,the distribution of domain names of web citations and also certain aspects about the institutional and/or geographical affiliations of the author.The evolving situation of utilizing online networked academic information resources in China is the central thematic discussion of this study.The writing of this paper is augmented by the explicatory presentation of 3 graphic figures,6 tables and 18 references.

Implementation of a weblog extraction system with an improved template extraction technique

Purpose: The objectives of this study are to explore an effective technique to extract information from weblogs and develop an experimental system to extract structured information as much as possible with this technique. The system will lay a foundation for evaluation, analysis, retrieval, and utilization of the extracted information.Design/methodology/approach: An improved template extraction technique was proposed.Separate templates designed for extracting blog entry titles, posts and their comments were established, and structured information was extracted online step by step. A dozen of data items, such as the entry titles, posts and their commenters and comments, the numbers of views, and the numbers of citations were extracted from eight major Chinese blog websites,including Sina, Sohu and Bokee.Findings: Results showed that the average accuracy of the experimental extraction system reached 94.6%. Because the online and multi-threading extraction technique was adopted, the speed of extraction was improved with the average speed of 15 pages per second without considering the network delay. In addition, entries posted by Ajax technology can be extracted successfully.Research limitations: As the templates need to be established in advance, this extraction technique can be effectively applied to a limited range of blog websites. In addition, the stability of the extraction templates was affected by the source code of the blog pages.Practical implications: This paper has studied and established a blog page extraction system,which can be used to extract structured data, preserve and update the data, and facilitate the collection, study and utilization of the blog resources, especially academic blog resources.Originality/value: This modified template extraction technique outperforms the Web page downloaders and the specialized blog page downloaders with structured and comprehensive data extraction.

Implementation of a Comprehensive Information Management Platform for Public Security Based on Java Technology

Due to the rapid development of electronic information technology,the development of Internet technology and system software development technology has become more and more common.Especially,along with the development of public security,there are more and more provisions for standard administrative department management system,improving office efficiency and enhancing decision encouragement.Therefore,it is of great practical value to design and complete a comprehensive public security business information system.Based on java technology,this paper designs and builds a comprehensive information management platform for public security through the analysis of comprehensive public security business,and also gets good feedback during the actual test,which confirms the feasibility of the system.

基于Web的立体农情信息系统的建立

介绍了基于Web的立体农情信息系统各功能模块的设计原理和方法。该系统通过把农业属性数据、投入数据、产出数据、专家系统、政府行为有机地结合在一起,使数据的录入、管理、分析和结果的显示一体化,实现在线信息数据提交、处理和结果反馈。

基于WEBG IS的旅游信息服务平台设计与开发

近年来随着我国旅游业的快速发展,旅游信息化日益成为旅游管理部门关注的焦点。本文通过分析旅游信息化过程中存在的问题,提出了旅游信息系统应该具备的功能。并通过功能模块的逻辑谓词公式,建立了系统的逻辑结构和任务树,这种结构化的需求分析,为系统进一步开发提供了保证。

基于SOA和Web Services的信息集成便民服务系统的设计与实现

随着国家"五位一体"建设步伐的加快,信息化、网络化、集成化已经成为健全社会基本公共服务体系的基本内容和发展方向。本文全面阐述了采用Web Service技术、SOA技术、RFID和PKI技术以及云备份等信息技术,通过实现基于元数据模型和综合数据集成和共享,最大限度地满足社会公共服务行业特别是广大人民群众生产生活需求的设计理念、系统构架、系列功能及其运行方法。

A Sightseeing Planning Support System with Gamification

In recent years, as there has been a major change in the necessity and importance of sightseeing information, a platform to provide real-time sightseeing information according to the ever-changing circumstances is necessary. Additionally, it is effective to adopt gamification to increase users’ motivation to continuously utilize the system in order to provide them with more information. In the present study, in order to support users’ enjoyment in creating efficient and pleasant sightseeing plans, the system that incorporates gamification to increase motivation was developed combining with web-geographic information systems (Web-GIS) and sightseeing planning and sharing system. The system was operated over a period of 2 weeks in Chofu City, Tokyo Metropolis, Japan. Based on the results of a questionnaire survey for 51 users, though the operability of the 3 main functions incorporated with motivation by gamification was rated lower than those of the 2 basic functions, their usefulness was highly rated. Based on the results of the access log analysis, it was effective to design the system so that the same functions can be used regardless of the type of information terminal. Additionally, it was evident that the continuous utilization of the system could increase the number of sightseeing plans created by the users.

教学督导信息化的探讨

本文介绍了教学督导信息化建设意义、进展、存在的问题及解决措施。通过提高教学督导信息化水平,提高教学督导工作效果,进而提高高等教育质量成为关注的热点。教学督导信息化的形式,最初主要是构建网站,逐渐向网格技术、Web Service等方面发展,进而建设实现教学督导功能的管理信息系统。目前存在的主要问题是对教学督导信息化的重视不够,发展目标不明确,以及重硬件建设轻软件开发。采取的主要措施有将督导信息化列入学校信息的计划,加强信息化队伍的建设。

面向服务型的教育信息化模式研究

对于我国教育信息化建设中存在的问题,提出校园信息平台构建的SOA模式。对基于SOA模式的校园信息集成方案和系统平台的实现进行了初步研究,为教育信息化建设提供了一种有效的实现途径。

大学生形势与政策网络信息化教育探析

通过对大学生形势与政策教育的性质和现状分析,提出进行网络信息化改革的必然性,在开发形势与政策教育专网的基础上,进而探析形势与政策网络信息化教育的基本特征和质量评价有效机制,保证形势与政策教育的有效进行。

Resources Allocation Schemas for Web Information Monitoring

The web is an extremely dynamic world where information is updated even every second. A web information monitoring system fetches information from the web continuously and finds changes by compar- ing two versions of the same page. The updating of a specific web page is modeled as a Poisson process with parameter to indicate the change frequency. As the amount of computing resources is limited, it is nec- essary to find some policies for reducing the overall change-detection time. Different allocation schemas are evaluated experimentally to find out which one is the most suitable for the web information monitoring prob- lem. The experimental data shows the runtime characteristics of the overall system performance and the re- lationship to the total amount of resources.

基于实景三维的国土信息化平台应用系统设计与实现

实景三维场景受到越来越多管理部门的青睐,本文以B/S架构和WebGIS技术,结合倾斜摄影与实景三维建模技术,以PostgreSQL数据库为数据存储管理中心,设计研发了针对全国国土调查成果数据的国土实景三维信息化平台应用系统。系统具有可视化表达、综合查询、专题统计等功能,通过系统测试与试运行表明,平台运行稳定、界面友好,为国土管理部门的科学决策与规划提供了技术支持,对国土调查成果数据的推广应用具有重要意义。

Monitoring and early warning system of porcine pasteurellosis based on WebGIS

The incidence of porcine pasteurellosis in China is so widespread that it is difficult to clearly understand the prevalence and maintain continuous monitoring.In order to reduce immense negative economic impact on the livestock industry;monitoring,early warning,and visual management systems are highly desirable.In this study,a monitoring and early warning systemfor porcine pasteurellosis was established based onWeb Geographical Information System(WebGIS)technology.By establishing a path analysis function,buffer analysis function,and hot spot analysis function,it can provide a method of support and control of infectious diseases.For early warning of disease,four common interpolation methods were tested,all of which showed that the affected area of porcine pasteurellosis in China was mainly concentrated in the south of the mainland.A cross-validation method was used to compare the four interpolation methods.The cross-validation showed that the inverse distance weighting(IDW)method was suitable for forecasting the occurrence of porcine pasteurellosis in China.Finally,using C sharp(C#)as the development language and WebGIS technology,a monitoring and early warning system based on Browser/Server structure was developed.This is the first monitoring and early warning system of porcine pasteurellosis based onWebGIS.The performance of theWebGIS technology indicated a great potential for animal infectious disease applications and provided a foundation for future work.

Web search engine:characteristics of user behaviors and their implication

In this paper, first studied are the distribution characteristics of user behaviors based on log data from a massive web search engine. Analysis shows that stochastic distribution of user queries accords with the characteristics of power-law function and exhibits strong similarity, and the user' s queries and clicked URLs present dramatic locality, which implies that query cache and 'hot click' cache can be employed to improve system performance. Then three typical cache replacement policies are compared, including LRU, FIFO, and LFU with attenuation. In addition, the distribution character-istics of web information are also analyzed, which demonstrates that the link popularity and replica pop-ularity of a URL have positive influence on its importance. Finally, variance between the link popularity and user popularity, and variance between replica popularity and user popularity are analyzed, which give us some important insight that helps us improve the ranking algorithms in a search engine.

Mapping ideas from cyberspace to realspace: visualizing the spatial context of keywords from web page search results

We introduce a new method for visualizing and analyzing information landscapes of ideas and events posted on public web pages through customized web-search engines and keywords.This research integrates GIScience and web-search engines to track and analyze public web pages and their web contents with associated spatial relationships.Web pages searched by clusters of keywords were mapped with real-world coordinates(by geolocating their Internet Protocol addresses).The resulting maps represent web information landscapes consisting of hundreds of populated web pages searched by selected keywords.By creating a Spatial Web Automatic Reasoning and Mapping System prototype,researchers can visualize the spread of web pages associated with specific keywords,concepts,ideas,or news over time and space.These maps may reveal important spatial relationships and spatial context associated with selected keywords.This approach may provide a new research direction for geographers to study the diffusion of human thought and ideas.A better understanding of the spatial and temporal dynamics of the‘collective thinking of human beings’over the Internet may help us understand various innovation diffusion processes,human behaviors,and social movements around the world.

2D Correlative-Chain Conditional Random Fields for Semantic Annotation of Web Objects

Semantic annotation of Web objects is a key problem for Web information extraction. The Web contains an abundance of useful semi-structured information about real world objects, and the empirical study shows that strong two-dimensional sequence characteristics and correlative characteristics exist for Web information about objects of the same type across different Web sites. Conditional Random Fields （CRFs） are the state-of-the-art approaches taking the sequence characteristics to do better labeling. However, as the appearance of correlative characteristics between Web object elements, previous CRFs have their limitations for semantic annotation of Web objects and cannot deal with the long distance dependencies between Web object elements efficiently. To better incorporate the long distance dependencies, on one hand, this paper describes long distance dependencies by correlative edges, which are built by making good use of structured information and the characteristics of records from external databases; and on the other hand, this paper presents a two-dimensional Correlative-Chain Conditional Random Fields （2DCC-CRFs） to do semantic annotation of Web objects. This approach extends a classic model, two-dimensional Conditional Random Fields （2DCRFs）, by adding correlative edges. Experimental results using a large number of real-world data collected from diverse domains show that the proposed approach can significantly improve the semantic annotation accuracy of Web objects.