Network Virtual Computer Interface Laboratory Case Study Based On .NET Technology

Web based virtual laboratory learning system is to build up a visualized experiment environment on network in order to carry out experimental lectures through Internet. This learning system overcomes location limits in traditional face-to-face learning mode, and extends experimental classroom to any place through Internet. The virtual laboratory system will greatly simplify the operation course of the experiment, will save the costs of use of different instruments in the experiment, realize the electrification of the experimental data, has broken the traditional restraint on region space and time of laboratory.Nowadays, web based long-distance learning system for classroom instruction has become more and more mature. However, web based long-distance learning system for experiment instruction is still to be developed. This paper is based on computer technology of the multimedia , network technology , fictitious instrument technology, have put forward the idea of carrying on the fictitious experiment on the net, namely replace the hardware with the software, use programming simulate the whole course of the experiment. And provide a set of the proper technological solutions of construction of virtual laboratory, taking chip 8255 conjectures and experiment to convert the sketch manifestation conjecture experiment system terrace with D/A experiments in " interface technology of the computer " as an example, the careful analysis the whole course of development of Web based virtual laboratory learning system, thus verified the feasibility of this set of brand-new solutions. This paper finishes the following task mainly:1). This subject has briefly introduced a network the research and the development circumstance of the virtual laboratory first, and aim at currently the concrete circumstance of the laboratory, put forward the necessity and the meaning of this topic research.2). This paper analyses and compares with the characteristic of Client/Server and Browser/Server, two kinds of network structure, this system selects Browser/Servermode finally. In some aspects , such as dependability , privacy , stepping the flat characteristic , software putting in an position , etc., it fit well according to the demands of Web based virtual laboratory.3). Through to the analysis of several key technology of the virtual laboratoryboth at home and abroad, and the computation of various kinds of popular technology and software tool at present, this paper put forward one brand-new solution, then adopted according to the .NET technique,the usage C#the language development conjecture experiment the instrument control a piece, combining the ASP.NET technique and the database technique to carry out the virtual network experiment system.4). According to the design principle and goal of the Web based virtual laboratory, this paper has analyzed about function, module, system procedure of the system, etc, and take chip 8255 conjectures and experiment to convert the sketch manifestation conjecture experiment system terrace with D/A experiments in the interface experiment of the computer as an example, finish the development of the Web based virtual laboratory. And the draw line operation and the dynamic graphical display are difficult points of this system.This topic's putting forward a purpose was the design and frame solution ,this textthat investigates the basic system structure ,key technique of the construction conjecture experiment system and carries out a technique ,the virtual instrument subsystem to not only carry out an integrity practical virtual laboratory system completely, but also do to try creatively for the development design of virtual laboratory Thus is the realization is each the high etc. college make in the calculator technique,automobile engineering, machine, the medical treatment technique etc. of education quality again up the new step lay foundation.This subject has been studied well about virtual experiment implementation method and framework, has made some experience, and has done some basic worksfor future study. But because of the restriction on time, only structured a virtual laboratory frame, and finished some of the functions, to finish it there is still long way to run. Therefore the research in the future can be deepened in the following aspects:First of all, the virtual experiment is the long range teaching of an organic constitute part, in the future research ,increase a new virtual experiment, with further perfect origin virtual laboratory system, make it become a more perfect calculator to pick up a people thus network conjecture experiment system., long range thus, in the future research, can add new virtual experiment on the basis of this system, in order to make it become a teaching software with multi-media more perfect a virtual laboratory system further.Secondly, this system only realizes the plane figure structure, lack of the sense of reality. Can utilize VRML technology or 3DMAX technology in the future research, will test the platform to make into more lifelike and vivid 3D result, make the person who makes experiment has a feeling of on the spot.Finally, should visit in the long range of problem up, again further perfect, strengthen the network safety in the meantime, assurance system of steady movement, but it still can not realize multi-user in coordination with the homework. Therefore the research in the future should perfect the long- range ability to work in coordination.