The advantage of this method is that the method of curves can be directly used on rectangular surfaces for degree reduction . in the third chapter , modifying the shape of nurbs surfaces and rational bezier curves with geometric constraints is studied . the problems based on weights are discussed 第三章研究nurbs曲面和有理b zier曲線的幾何約束修改問(wèn)題,討論了基于權(quán)的nurbs曲面幾何約束修改和基于控制頂點(diǎn)或基于權(quán)的有理b zier曲線幾何約束修改。
Simulation analysis is carried out with regard to the power transfer rule of the points in rectangular surface and of the rectangular surface . infection of parameters to surface mobility is examined and academic formulae of surface mobility are compared with those evaluated by numerical formulae . 5 對(duì)激勵(lì)面上各點(diǎn)的功率傳遞規(guī)律和以整個(gè)激勵(lì)面為一個(gè)單元的功率傳遞規(guī)律進(jìn)行了研究,分析了各個(gè)參數(shù)對(duì)面導(dǎo)納的影響,并對(duì)理論公式和數(shù)值估計(jì)表達(dá)式進(jìn)行了比較。