204b基于web的科研信息管理系統(tǒng)的設(shè)計外文文獻(xiàn)翻譯-在線瀏覽
2025-02-06 07:21本頁面
【正文】 e client, must be emulated by the CGI programs. Therefore it adds more load to the server machine. Another approach of accessing client/server applications from standard WWW browsers was made by Dossick and Kaiser. They suggested a scheme to use a HTTP proxies as a method of connecting an existing client/server system to the web. This HTTP proxy intercepts HTTP requests for data and transforms them into requests for the legacy system using its native protocols. It is possible to use browserspecific tools like Netscape39。ware tools are pointed out by Birolini. In order to be a useful tool for users, having a large ponent database is the very important pared to other requirements. Under the standalone puting environment, users should own the ponent data storage independently. It will be waste of puting resources and time. The most available tools are standalone so it is very inconvenient to share ponent data between users. Considering the above requirements and opinions collected from field trial of the ERIS, we draw the following items. Userfriendly human interface : The manmachine interface is important for efficient handling of large amount of data. Also it is helpful understanding the overall results of an analysis.Openness : The information service must be broadly accessible. Openness also reflects in the end user39。s ID is registered to user DB, he/she can download ERIS client program anywhere. The client programs of the ERIS are implemented as windows programs. They handle applicationspecific functions that the original clients handled on behalf of the server. They have a more easytoaccess and userfriendly interfaces which supplies a good foundation for incorporating reliability studies into the design process. The munication between server process and client process for the request of the standard ponent data is made through typical TCP/IP. Figure 1 shows the bined structure of WWW and client/server architecture in ERIS. The server has two processes such as CGI and COM. CGI module handles the HTTP request from client web browsers and returns corresponding results. COM is a munication process which manages the request for ponent data. There are temporary database filtering the incorrect ponent and user information. Thus only the verified users and ponent information can be registered.A workstation with a UNIX operating system is used as a server, and PCs as clients. The INFORMIX database management system is used to manage the user and ponent data. The server process is implemented using ESQL/C language. Client programs are developed using MS visual C++ and Delphi development kit.4. CONCLUSIONSThe developed system ERIS is widely used by both system developers and reliability analysts. By bining the concept of the WWW and th
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