Computer-aided design CAD

Developments. A variety of process modifications aimed at improving surface finish or weld line integrity have been described. They include gas assisted, co-injection, fusible core, multiple Hve feed, and push—pull injection mol ding (46,47). An important development includes computer-aided design (CAD) methods, wherein a proposed mold design is simulated by a computer and the melt flow through it is analy2ed (48). 

Computer-aided design (CAD) solutions (drawing tools)... 

The introduction of computers to many companies allows proprietary software to be used for layout design. Spreadsheet, mathematical modeling and computer-aided design (CAD) techniques are available and greatly assist the design process, and have added to the resources available to planners. However, the traditional scale models described above will still be useful to present the result to management and shop floor personnel. 

In most design offices Computer Aided Design (CAD) methods are now used to produce the drawings required for all the aspects of a project flow-sheets, piping and instrumentation, mechanical and civil work. 

Computer aided design (CAD)/computer-aided manufacture (CAM) programs have been developed to carry out the necessary calculations. One current system known as Polyflow is offered by a Belgian organisation (Polyflow SA). Polyflow can be used to calculate three-dimensional flow and die swell, using finite element analysis. Other systems are available. 

Few systems genuinely allow end users to make arbitrary extensions those that allow it must provide a programming or scripting language of some sort. Normally there is some restriction all the additions fit within a framework. An example is a computer aided design (CAD) system, in which new kinds of mechanical parts can be added and the users... 

Riley, D.P., Henke, S.L, Lennon, P.J., Aston, K. Computer-aided design (CAD) of synzymes use of molecular mechanics (MM) for the rational design of superoxide dismutase mimics. Inorg. Chem. 1999, 38(8), 1908-1917. 

A number of industiy-accepted state-of-the-art 3D computer-aided design (CAD) systems have been used for this purpose. The specification-driven 3D-CAD system allows a computer model to be built to allow extraction of drawings from the model for fabrication and erection. The extracted drawings are enhanced in their accuracy by the computer interference detection system which greatly reduces field rework. 

A computer with a computer-aided design (CAD) or magnetic resonance imaging (MRI) software package... 

The term computer-aided design (CAD) is widely used within engineering but is often interpretted in different ways. It should not be... 

An elastomeric stamp or mold with relief structures on its surface is the key to soft lithographic techniques (see Sect. 3.2). As a result, the utility of these techniques is often limited by the availability of appropriate masters. In general, the masters are fabricated using photolithography. Chrome masks are available commercially from custom fabricators,but the time required for vendors to produce a chrome mask from a design presented in a computer aided design (CAD) file can be weeks, and they are expensive ( 300 per square inch for features larger than 20 pm, and 500 - 1000 per square inch for features between 1 and... 

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