With the rapid development of computer technology and the Internet, engineeringdrawing realizes digitalization. Most of the engineering drawings are two-dimensionalgraphics drawn with the computer graphics software, when being exchanged andtransmitted frequently through the network, it is inevitably for them to be illegallyspread, interpolated, and forged, etc.. Making use of digital watermarking technologiesis an effective means
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Engineering drawing takes up most of the design cycle time in the process of mechanical product design. Designers need constantly amend the engineering drawing according to the change of the structure during design process. And engineering drawing pattern is very complicated, because there are lots of dimensions and comments need to be marked. The large
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With the increasingly fierce market competition, the response speed of the market is often the key to victory in the competition. In the petrochemical construction industry, Modeling and simulation throughout the lifting processing are need before the lifting of large-scale petrochemical equipment. So staff need create three-dimensional model of petrochemical equipment. However, the entire building
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With constant developments in computer technology and internet, virtual experiment has fastly becomes avaliable in the current education practice. The application of virtual experiment has significantly changed traditional education approach.In this paper. I first review the current development in virtual lab technology and basic principles of virtual lab. Then I analyze and compare several major
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The watermark technology is an effective technology for digital product copyright production. It overcomes the problem that the encrypted data is no longer safe after deciphering in traditional cryptograph technology. PDM (Product Data Management) technology is used to manage information of a whole life cycle of product, large quantities of engineering drawings can be saved
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As the extensive application of modern commercial CAD software, engineering drawing is now drawn by computers instead of hands, and the efficiency of design has a great improvement. Nowadays, CATIA is widely accepted and used in the domestic aviation companies because of its accuracy, safety, and reliability. But as a general CAD software, it can
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The description, transfer and acquisition of product information is a basic problem in the area of computer-aided design and computer graphics. Engineering drawing interpretation (EDI) is a kind of acquisition behavior of product information on the base of engineering drawing. It emerged as a vibrant area of interdisciplinary research, attracting the efforts of computer graphics
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The reuse of electronic drawings is a effective way to improve the efficiency of CAD software. How to speedily, accurately search out the required drawings from the database is especially important to the user. Nowadays, the query of drawings is performed based on keywords, such as project, designer, drawing number, and so on. The keyword-based
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