CAD Performance

FIGURE 84.4 A desktop environment of the HMT-CAD performance assessment package including system model development and analysis result reporting. 

Velikova M, Samulski M, Lucas PJ, et al (2009) Improved mammographic CAD performance using multi-view information a Bayesian network framework. Phys Med Biol 54 1131-1147... 

The use of the computer in the design of chemical processes requires a framework for depiction and computation completely different from that of traditional CAD/CAM appHcations. Eor this reason, most practitioners use computer-aided process design to designate those approaches that are used to model the performance of individual unit operations, to compute heat and material balances, and to perform thermodynamic and transport analyses. Typical process simulators have, at their core, techniques for the management of massive arrays of data, computational engines to solve sparse matrices, and unit-operation-specific computational subroutines. 

The rapid increase in computer applications is partly attributable to both the decreasing costs of hardware and software and to the increasing costs of human labor. This shift has given rise to a productivity factor assigned to various tasks performed by computers versus people. One figure recently quoted was a minimum factor of 4 to 5 for CAD (computer aided design), that is, one draftsman with a CAD system can replace 4 to 5 manual draftsmen. 

CAD and CAE (http //www.montell.com/ montell/products/p-cad.html) computer modelling of product performance and manufacturing processes. Montell s technical centres routinely use sophisticated CAD/CAE systems for customers... 

A special category of ignition system is the cartridge actuated device (CAD) also known as the Propellant Actuated Device (PAD) which serves to generate the mechanical force to close switches (in the manner of a squib) or to perform otherwise mechanical work (Vol 2, C70-R Ref 138, p 167)... 

Buiatti et al. (136) investigated the content of eight BAs (His, Tyr, Try, Phe, Put, Cad, Spm, Spd) in alcoholic and nonalcoholic beers. Liquid-liquid extraction was performed with BuOH CHC13 (1 1) the analytes were derivatized by DNS and analyzed according to Moret et al. (5). Sixteen different types of beer were analyzed just six amines were found. In particular, His and Spm were not present in detectable amounts, whereas, despite the absence of any reference in the literature to Spd content in beer, this amine was found in all the samples. Nonalcoholic beers did not show significantly lower amounts of BAs than alcoholic beers. 

The CAD design generated the geometry by performing Boolean operations on simple volumic primitives [2], The microstructure was realized by microstereolithography. This technique is based on a layer-by-layer light-induced polymerization of a liquid resin, a pre-polymerized solution. Actually, about 1800 layers of 5 pm thickness were superimposed in this way (5 h manufacturing time). 

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