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Residue curve maps of ethyl acetate synthesis reaction
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作者 郑辉东 田晖 +5 位作者 邹文虎 黄智贤 王晓达 邱挺 赵素英 吴燕翔 《Journal of Central South University》 SCIE EI CAS 2013年第1期50-55,共6页
The residue curve maps are considered as a powerful tool for the preliminary design of reactive distillation. The residue curve maps of ethyl acetate synthesis reaction were calculated based on the pseudo-homogeneous ... The residue curve maps are considered as a powerful tool for the preliminary design of reactive distillation. The residue curve maps of ethyl acetate synthesis reaction were calculated based on the pseudo-homogeneous rate-based kinetic model and the NRTL activity coefficient model. The results show that the unstable node branch emerges from the ethyl acetate/water edge, moving toward the chemical equilibrium surface with the increase of Damkoeler value (D), and the node reaches the ternary reactive azeotrope when D-∞ eventually. Conceptual design for the ethyl acetate synthesis of reactive distillation based on the residue curve maps is presented at last. 展开更多
关键词 residue curve maps ethyl acetate ESTERIFICATION conceptual design
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Positioning method of a cylindrical cutter for ruled surface machining based on minimizing one-sided Hausdorff distance 被引量:3
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作者 Cao Lixin Dong Lei 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2015年第5期1564-1573,共10页
Motivated by the definition of the machining errors induced by tool path planning methods, a mapping curve of the tool axis of a cylindrical cutter is constructed on the tool surface. The mapping curve is a typical on... Motivated by the definition of the machining errors induced by tool path planning methods, a mapping curve of the tool axis of a cylindrical cutter is constructed on the tool surface. The mapping curve is a typical one that can be used to express the closeness between the tool surface and the surface to be machined. A novel tool path planning method is proposed for flank or plunge milling ruled surfaces based on the minimization of the one-sided Hausdorff distance (HD) from the mapping curve to the surface to be machined. It is a nonlinear optimization problem in best uniform approximation (BUA) or Chebyshev sense. A mathematical programming model for computing the minimum one-sided HD is proposed. The linearization method of the programming model is provided and the final optimal solutions are obtained by simplex method. The effectiveness of the proposed BUA method is verified by two numerical examples and compared with the least squares (LS) and double point offset (DPO) methods. The variation in tool orientation induced by the optimization of the tool positions is also evaluated. 展开更多
关键词 Geometrical error mapping curve Mathematical programming Minimum Hausdorff dis-tance Ruled surface Tool path planning
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