In order to overcome the problems associated with WebGIS,this paper introduces the concept and operational principle of AJAX method and proposes to build a WebGIS based on AJAX method.With the development of a forest resources information web publishing prototype WebGIS system,this paper discusses some key technologies and advantages of AJAX method.The result shows that AJAX method not only can easily realize the forest resources information web publishing,but also can greatly improve the WebGIS's overall performance.
Based on a practical application,this paper presents a design and implementation of an embedded device which works as a download controller and a media renderer based on UPnP.The device can be used in the family video and audio file download system to link the download server and display devices.Thus the users can use home display devices(such as TV) to manage download process and play multimedia files.The paper details the key technologies for download controller and media renderer,and also identifies the difficulties in the performance.
In view of the geologic factors for that impacted on the coal mine production,for example,the rift tectonic,the magnetic intrusive rock and so on grew energetically,it very serious affected on coal mine production,research on the character of rift tectonic structure and the rule of intrusive mass growing was urgently needing solution subject of Daxing filed.Based on combined analysis of Daxin field’s geological record and well survy,the author make a lot of research about development of rift tectonics,range’s regularity and intrusive mass’s special spread regularity,summarize the characteristic of rift tectonics and control action to intrusive mass,provide reference to Daxin field’s excavate production.
Environmental impact assessment Is not only a compulsory professional course for environmental engineering students,but also Is the main career direction for them to step into the modern society.According to the characteristics of environmental impact assessment course,such as comprehensiveness,practicalness,wide professional knowledge,and so on,the author reformed the teaching contentS,teaching practice and other segmens,Illustrated the importance of the case studies,media instruction,communication and practice in the appraise teaching.We reformed the traditional test methods,giving prominence to usuall results.A few constructive suggestions Are given for practical teaching for the benefit of promoting students' ability to combine theory with practice.
To improve the teaching of CAD/CAM,the specialty significance hardware,facilities and teach ing environments are discussed in this paper and a series of aims and measures of the innovation of the teaching of CAD/CAM are presented about the ideas,contents and environments under various situation s.The imp-ortance of the practical teaching platform is emphasized.
