查询词典 Fermat's principle

A numerical ray-tracing algorithm is provided based on Fermat＇s principle.

并基于费马原理，提出了记录光路的光线追迹数值算法。

Based on Fermat's principle and light path function, it gets the spectral distribution of the incident rays, and it can get the ray tracing map through a matrix method.

在费马原理的基础上利用光程函数法得到入射光通过光栅后的光谱分布情况，再使用传输矩阵的计算方法构造出光谱的点列图。

Fermat's principle ; ray tracing ; spline function ; gradient method ; target method

费马原理；射线追踪；样条函数；梯度法；打靶法

Based on Fermat's principle, the paper uses full-path iterative algorithm to realize 3-D VSP two-point ray tracing in volume element model.

本文基于费马原理，利用全路径迭代算法实现体元模型中的三维VSP两点射线追踪。

Using the Fermat's principle,the paper presented a fast and effective ray tracing method-ray tracing with minimum time.

石油地球物理勘探，2 0 0 2 ，37(5 )：4 5 5～ 4 5 9 本文利用费马原理提出了一种快速、有效的射线追踪方法——最小时间射线追踪方法。

First,using cubic spline function to describe the geologic model in detail,then using fermat's principle to introduce deferential form for a set of raypath equations.

首先利用三次样条函数详细描述地质模型，根据费马原理导出微分形式的射线路径方程组。

Fermat's principle: The raypath which seismic energy will follow between two points is that for which the first order variation with all neighboring paths is zero.

费马原理：两点之间地震波传播的射线路径，它与相邻路径的一阶差分为零。

In the modeling of recording optics, the main contents of this thesis are: deriving the fourth-order analytical model for the recording optics with auxiliary spherical mirrors and auxiliary uniform-line-spacing plane gratings, providing the numerical ray-tracing models based on Fermat's principle and local search, and analyzing the expansion errors of analytical models.

本文在记录光路建模方面的主要工作是：针对使用辅助球面镜与辅助等间距平面光栅的两种记录光路，推导了四阶解析模型，给出了基于费马原理与局部搜索的光线追迹数值模型，并分析了解析模型的展开误差。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。