ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

A method to express the flexible cam curve with continuous jerk by using quintic NURBS curve was presented. Then the cam curve could be optimized by adjusting knot vector, control points and weight factors of NURBS curve. The multiobjective optimization for a cam curve was described to satisfy both kinetic and dynamic requirements. To solve the optimization model for NURBS cam curve, a hybrid genetic algorithm combining elitism strategy, selection strategy based on goal attainment method and fast non-dominated sorting algorithm was proposed. The optimization example illustrated that the presented hybrid genetic algorithm could solve multiobjective optimization problem and achieve cam curve with good synthetic performances.