Information Extraction (IE) is a term which has come to be applied to the activity of automatically extracting pre-specified sorts of information from natural language texts. This paper analyses the basic concept of information extraction, the main research activities on information extraction, the type of information extraction and the system of information extraction. The author believes information extraction will play a very important role in coping with the huge collection of digital information. It can provide helps in automat ic annotation of digital materials, automatic acquisition of metadata, improving data mining in information analysis, developing knowledge base from free text, and generating answers in digital reference system.
This paper analyzes the building and perfecting of user profiles and document profiles and the matching mechanism between them in digital library, and puts a strong emphasis on the filtering system for digital library.
This paper mainly introduces the architecture of OAIbased metadata harvesting system and compares and analyzes the component function of architecture. The paper also summarizes and concludes the problem and answer in building heterogeneous digital library applying OAI.
As an information buildup manner, hyperlink has become more and more important than before. But it is only used on document nonlinear buildup, hyperlink has no semantics itself. So it is important to type hyperlink based on semantics first. Under such circumstances, this paper first analyzes the former works about hyperlink definitions and types, and then puts forward a method of typing hyperlink, which is based on structure semantics on Web pages. Finally we discuss its applications on information retrieval.
It is reasonable to make use of the remote control in university library, where are the quantity and distributed client machines. The paper introduces the remote control with the related software, and discusses it in the applied foreground of the university library and the possibility problems.
With more and more scientific documentation are available electronically in Internet, reference management system is becoming an essential tool for daily researchers. In this paper, the strategies and the corresponding technologies to build a reference management system based on B/S (Browser/Server) scheme are discussed. The status and trend of the development of current reference managers are first overviewed, then a general framework of B/S based reference management system is designed, which mainly consists of four functional modules: user authority control, data import, management and export. RefM anager, a preliminary reference management system based on the framework, is developed, which permits automated import of searching results in bibliographic databases such as EI engineering village and can export the references in the thesis format defined by the author’s institute.
With the development of relative technology and the increase of reader s demand, it is possible and necessary to carry out VOD service in libraries. This service is a further deepening to library network service. It is favorable to the whole construction of digital library and another reflection to the application of science and technology level in network times. In order to construct this service, we must program and manage scientifically, act according to our capability and carry out the service on the basis of our characterist ics.
This article indicates the benefit that the IC card management system used in Jinan Univesity library,and introduces the integration about the IC card management system and ILAS,including the Internet applications,database,system parameter and so on.
This paper introduces reading room management program with Delphi, to record reader going to reading room, record the art and the books readed. This program is to improve the reading room management level, also it is a useful tool in library.
With the continuous appearance of WLAN technology standards and relevant products based on these standards,the application and extension of WLAN have reached a new stage. What influences on WLAN technology of library network and how to apply WLAN technology into the construction of library network have been the focus to which people pay attention increasingly.This article introduces some conceptions and technology of WLAN,puts forward some construction modes of WLAN in library,and based on personal practice, the paper analyzes the realization of wireness electronic reading room in library.
In the paper , based on the method of Bottom-up information organization of IA ,the theories,methods,and steps of concept space generation are explored. Furthermore,the applications in medical information retrieval system are introduced.
The increasing of data s storage timely in different places makes the net storage technology more and more important。As core of it,iSCSI makes the full use of the priority of present IP net s maturity and popularity and gives the ability to access directly to storage equipment which are cheap and can be managed easily。It will develop deeply for it s good characters such as low cost、convenience、opening、safety and standard.
The paper introduces 9 famous database retrieval systems, puts forward some evaluation indexes for database retrieval system, and uses these indexes to evaluate 6 retrieval system of INSPEC. Finally it discusses the strategy of evaluation and selection on database retrieval system.
The author analyses the characteristics of search engine Google, discusses on the problems of Google service. The paper gives the following conclusion based on the particular examples: when we do a combination search, we need to bracket every Chinese.
Based on the analysis of characters、information organization、administrative system of gateways, this paper discusses the building of quality-controlled subject information gateways, and the building of advanced technology for material synthesis and processing information gateways.
iDdb3 is a very excellent competitive intelligence database of drug industry. This paper introduces the resource 、user、indexing system、retrieval method and retrieval technology of the database.
Library of USTC introduces the computers in the whole-process management of sci-tech novelty search by establishing network platform, which is a very useful try to control and develop the quality and archives conservation of sci-tech novelty search.
The intrusion detection system as one of the key technology while auditting safely,is the important component of network safe protection。Intrusion detection system as a kind of positive safe protection technology,proceed from angle of three-dimensional depth、multi-level defence of network security, people paid close attention to the intrusion detection system。This paper described to the function、composition、classification of the intrusion detection system,and has carried on research in the application in the network security of the library of intrusion detection system.
This paper analyses some key technologies of network security for E-government, including firewall, intrusion detection, shadow scan and physical isolation technique, etc. The Defense-in-Depth & Assurance Framework of network information system is presented which is based on detection and responsive, the function and its subsystems are also described. At last, this paper illustrates an application example at the end of the paper.
This paper summarizes today s typical security structure in electronic commerce system, then a multi-lever security model based on the traditional strategy is proposed, it avoids the disadvantage that existing security strategy severely relied on the technique and security device. The model is more emphasizes the staff-center strategy than the traditional s, it gives a new model to solve the security problem in electronic commerce system.
This paper recommends comparing methods with service training, fields service and emergency measures on PPC service.
Integrated storage solutions, DAS and SAN included, that work together reliably and efficiently for digital library such as the one used in Xiamen university library is introduced in this paper.
This paper introduce the method of building SQL Server database security control strategy,the method of database backup by using SQL Server enterprise manager or application program,and the method of database restore.
This article mainly describes the way of making multimedia courseware by using the technology of Web pages design,meanwhile it narrates the process of offline database dynamic retrieval which has implemented into practice and has proved to be a good way on improving the teaching efficiency.
According to the increasing of digital information and the lacking of storage device in university library, this article analyses and compares NAS and SAN. and draws a conclusion that NAS is suited for micromidi library and SAN is suited for large library.
Taking the library in Jiujiang college indicates the construction of Storage Area Network(SAN), including the selection,installment, training, building and management of the SAN.