More practical ray tracing methods currently include the wavefront method, the shortest path method, the travel time epenthesis method, the eikonal equation finite difference method, etc.
当前实用性较强的射线追踪方法，包括波前法，最短路径法，走时插值法，程函方程有限差分法等。
Objeclive:To establish a two dimensional finite element analysis model for hard tissue morphology on lateral cephalometric X ray film.
目的：建立X线头颅侧位定位片硬组织形态二维有限元分析模型。
A finite automaton (FA) was used to build up the shallow water ray tracing model, and the model state, transition, event and action were analyzed.
用有穷状态自动机对浅海的声线追踪建模，给出了浅海声线追踪内在的状态及状态转移分析。
Purpose To construct a finite element model of a normal foot. With this model, the spinal change of the first ray, the relationship between the change and hallux valgus were analyzed.
目的建立正常足的三维有限元模型，并以此模型为工具，分析正常足负重后第一跖列的空间位置变化与趾外展外翻的关系。
X2350A X-ray strain instrument was introduced to test the residual stress in the shocked region, and finite element software ABAQUS was used to simulate the stress.
用x2350a型x射线应力衍射仪测试冲击区域残余应力分布情况，并用有限元软件ABAQUS进行模拟。
In a 2-d structure, the calculation results of a hybrid method, which is based on combing ray tracing and finite-difference time-domain (FDTD) method, agree well with the measurement.
在二维情形中，基于结合射线跟踪法和时域有限差分法(FDTD)的室内无线传播混合建模方法对于室内无线传播的预测结果与测量结果吻合较好。
In a 2-d structure, the calculation results of a hybrid method, which is based on combing ray tracing and finite-difference time-domain (FDTD) method, agree well with the measurement.
在二维情形中，基于结合射线跟踪法和时域有限差分法(FDTD)的室内无线传播混合建模方法对于室内无线传播的预测结果与测量结果吻合较好。
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