The Research Into And Implementation Of 3D Virtual Chemical Experiments And The Reaction Automated Reasoning

Virtual Laboratory, as a research focus in the educational field, provides a new idea for experiment-teaching reform and it has the advantages of being economical, safe, space-time unrestricted, and integrated teaching etc. compared with traditional experiments.For chemistry teaching in middle schools, the most important application of information technology is the introduction of virtual chemical laboratory, by which students can understand more deeply and teachers can demonstrate chemical knowledge and each of the chemical experiment processes more clearly.At first, the dissertation states the concept of virtual chemistry laboratory and research status, and analyzes the shortcomings of present virtual chemistry experiments. Then it discusses some key technologies such as artificial intelligence, knowledge representation, knowledge database establishment and object-oriented program etc. Taking the shortcomings of present virtual chemistry experiments into account, the dissertation also puts forward the design idea and overall framework of 3D virtual chemical laboratory based on the mechanism of automatic reasoning. The design and realization process of key targets such as equipments, medicines and groups etc. are also discussed in the dissertation and it makes deep research into objects-serialized methods. It further discusses knowledge representation methods and the collection and analysis of chemistry knowledge in middle schools, on the base of which chemistry knowledge database is established; and it mainly describes the establishment of chemical-reaction-rules database in detail. Next, the dissertation deals with the implementation of chemical experiments in middle schools and related experiment instruments. Also, taking virtual instruments as an intelligent agent, it illustrates the action design and functions. At the same time, it discusses the assembling of chemical experiments,air-leakage test,and the determining of reactants, resultant and their storage which are the preparation of chemical reactions. Next, with examples the dissertation puts emphasis on the overall framework design and realizing process of the automated reasoning of chemical reactions, including the reasoning process of chemical substances classification, the process of molecules being spited into atoms, the process of atoms being combined into molecules by rules, and the process of balancing chemical equations and calculating chemical reaction. Finally, a summary and prospect of this paper are given.