Optical field intensity has been simulated by beam transmission method ( bpm ), bend loss has been calculated by used of the method of conformal transformations, gain has been accounted by the method of lines, and different curved optical waveguides have been compared in the last 采用bpm软件模拟光场在弯曲波导中的分布,用保角变换和射线法计算其弯曲损耗及增益,最后对不同结构的弯曲波导进行比较。
In this process, the thesis discusses detailedly the method which can improve the resolving power in measuring component and can deal with the probe circuit, and puts forward the design method of applied circuit . then the thesis discusses the methods of line and circle interpretation 接着又讨论了计算机数控系统的控制策略,主要包括:知道预定轨迹的直线与圆弧插补的方法、连续扫描系统的控制策略、pid调节器的设计及pid参数的整定方法等。
These properties make them ideal candidates for use in structure from motion algorithms . some known methods of line segment are integrated and an improved method is given . canny edge detector is used in this method to get edge, link the edge using freeman chain code, and then gradually delete useless chain code 首先综合边缘直线分割的研究成果,给出了改进后的边缘直线分割方法,该方法以图像边缘的链码表示为基础,逐步删除对完成计算机视觉任务没有意义的链码,并用最小二乘法拟合成图像直线。
The elastic foundation model is considered as two-parameter elastic foundation model and its effect to moderate-thick plates are taken into account by a set of governing differential equations . united with hu hai-chang ’ s function, least squares collocation weighted residual method which uses b-spline function as trial function is put forward for solving the bending problems . compare with the results of finite element method of lines, spline finite strip method, accurate solution of series etc . it is proved that the method in this article has adequate accuracy and practical feasibility 本文采用瑞斯纳中厚板理论求解弹性地基板,建立双参数地基与中厚板相互作用的控制微分方程,结合胡海昌的解耦函数,运用双五次b样条函数作为试函数的离散型最小二乘加权残值法分析了双参数地基上的中厚板的弯曲问题,并将结果与有限元线法、有限条法、级数精确解等进行比较,证明本文方法具有足够的精确性与实际的可行性。
The dynamic model is a typical nonlinear distributed-parameter system with high dimension about19xn x4, where n is the section number in one reformer . method of lines is adopted to reduce these partial differetial equations ( pdes ) into n lumped-parameter ordinary differetial equations ( odes ) solved by numerical algorithm 在静态模型基础上建立了全流程主要装置(重整反应器、加热炉、分离罐)的动态模型,采用分段线性化方法对重整反应分布参数模型离散化成一组常微分线性方程组进行了求解。