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第十一届几何与图学国际会议

作者： Mo Chunliu Tang Chaolan Li BingGuangDong University of Technology P.R.China (Guangzhou 510090)

＜正＞While organizing all information in multimedia database of online learning system for descriptive geometry, in order to guide students to search information effectively, we should clearly lay out connections of all teaching information by reasonable organization of contents, and design navigational routes and ways according to structural characters of the system.

关键词： descriptive geometry online structural design navigational design

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AN INTERACTIVE, ADAPTIVE ENVIRONMENT FOR ONLINE LEARNING OF descriptive geometry

AN INTERACTIVE, ADAPTIVE ENVIRONMENT FOR ONLINE LEARNING OF ...

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第十一届几何与图学国际会议

作者： Eduardo Toledo SANTOS Vania C.P.N.VALENTE Escola Politecnica University of Sao Paulo Brazil Escola Politecnica University of Sao Paulo Brazil

＜正＞This paper describes an online environment for learning descriptive geometry. Structured like an Intelligent Tutoring System, this interactive tool adapts teaching in accordance with the student’s performance. The instruction is based in solving descriptive geometry problems using a graphical applet. The problems are from an electronic library which catalogs them according to their concepts and difficulty levels and has a search mechanism used by a tutor module to select appropriate problems to offer the student when needed. The system maintains a model of the student to infer what he probably knows and what is still to be mastered. By comparing the students responses to the solutions recorded with the problems in the library, the tutor module is able to tell if the apprentice successfully solved a problem to, besides updating the student model, offer him help or another problem for increasing his development in the system.

关键词： Intelligent Tutoring Systems descriptive geometry E-learning Distance Education Learning Environment.

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A Comparison of Solution Strategies to Applied Geometric Design Problems by descriptive geometry and 3D-CAD

A Comparison of Solution Strategies to Applied Geometric Des...

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The 8th China-Japan Joint Conference on Graphics Education

作者： Hans-Peter SCHROECKER Kenjiro SUZUKI University of Innsbruck InnsbruckAustria The University of Tokyo TokyoJapan

＜正＞There is a wide spread use of 3D-CAD in industrial *** the spread,some people say that the traditional descriptive geometry is no longer any *** is true that the true length of a straight line and the intersection between two solid objects can be obtained much more precisely and much more quickly with the use of *** the traditional descriptive geometry no longer any use? Or,if it is still useful in 3D-CAD era,in which aspects is it useful? In this paper,we will solve some applied geometric design problems with the use of traditional descriptive geometry and 3D-CAD and compare the solution processes for getting some insight to the above mentioned questions.

关键词： CAD descriptive geometry applied geometry

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Development of PC-based Electronic Teaching and Learning Materials for De- scriptive geometry

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Computer Aided Drafting,Design and Manufacturing 2013年第3期23卷 58-64页

作者： LI Shao-jing Soichiroh INOUE Tohru KANADA Graduate School of Mechanical Engineering Kanto Gakuin University Department of Mechanical Engineering Kanto Gakuin University Department of Science and Engineering Kanto Gakuin Univeristy

descriptive geometry is very important and recognized as a basic skill and knowledge for mechanical engineering student. In this study, PC-based electronic teaching/learning materials for descriptive geometry are created using Flash, which is a typical animation creator. Furthermore, several axonometric representations, created by 3D-CAD, SolidWorks, for 3D objects are auxiliary materials to promote understanding of descriptive geometry. The axonometric representations in 3D-CAD are also dynamic, in other words, a viewpoint can be moved free. The movement of 3D model in a PC monitor can be recorded using a normal function of SolidWorks and replayed by typical animation software. The developed materials are excellent at accuracy of drawing, repeatability of self-study and visual attraction in comparison to oral presentation using still image and inaccurate drawing on a textbook or blackboard in a classroom. Actually, questionnaire survey results present favorable impressions from student-users, although they point out the further improvement in the replaying speed. The replaying speed can be controlled easily by using a normal function of Flash. In addition, usual playback software for animation has functions of pause and replay on demand and, thus, it is not contro-versial.

关键词： Electronic teaching material descriptive geometry moving image animation creator Flash 3D-CAD SolidWorks questionnaire survey

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Geometric Computing Based on Computerized descriptive Geometric

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Computer Aided Drafting,Design and Manufacturing 2011年第2期21卷 55-61页

作者： YU Hai-yan HE Yuan-Jun College of Mechanical Engineering Donghua University Shanghai 201620 China Shanghai Jiaotong University Computer Science and Engineering Department Shanghai 200240 China

Computer-aided Design （CAD）, video games and other computer graphic related technology evolves substantial processing to geometric elements. A novel geometric computing method is proposed with the integration of descriptive geometry, math and computer algorithm. Firstly, geometric elements in general position are transformed to a special position in new coordinate system. Then a 3D problem is projected to new coordinate planes. Finally, according to 2D/3D correspondence principle in descriptive geometry, the solution is constructed computerized drawing process with ruler and compasses. In order to make this method a regular operation, a two-level pattern is established. Basic Layer is a set algebraic packaged function including about ten Primary Geometric Functions （PGF） and one projection transformation. In Application Layer, a proper coordinate is established and a sequence of PGFs is sought for to get the final results. Examples illustrate the advantages of our method on dimension reduction, regulatory and visual computing and robustness.

关键词： geometric computing descriptive geometry computerized descriptive geometry (CDG) projection transformation primary geometric functions (PGF)

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