双高斯(Double Gauss)/普兰那(Planar)镜头(基本设计:6片4组 前后对称)是在1896年发明的,而天塞(Tessar)镜头(基本设计:4片3组)是在1902年才发明的.
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double-Gauss derivatives 双高斯型物镜变型
double-Gauss lenses 双高斯透镜
Double Gauss lens 双高斯镜组 ; 双高斯镜头 ; 双高斯透镜
double-gauss type lenses 双高斯式物镜
double-gauss objective 双高斯型物镜
double-gauss goniometer 双向测角仪
double Gauss objective 双高斯物镜
double-gauss 双高斯
double gauss model 双高斯模型
For this character, to use more fine double Gauss model to simulate the distribution and to use EM principle to get the corresponding model coefficients is a good idea.
针对这个特点，采用更为细致的双高斯模型来模拟这种分布，并且使用EM算法来获得相应的模型参数。
On this foundation, it simulates the projections for double Gauss distribution function and reconstructs the simulating temperature field by the convolution method for parallel beam.
依此原理，模拟了双高斯分布函数的投影，并由平行束卷积法重建出模拟的温度场。
Heat source models for calculating temperature field were discussed, Gauss distributed source model and double ellipsoid heat source model were established.
讨论了计算温度场的热源模式，给出以高斯函数分布和双椭圆体能量密度分布的两种热源模式。
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