diffusion approximation meaning in English
扩散近似法
Examples
- Diffusion approximation for a re - entrant network under the priority service discipline
一类重入型网络在优先服务原则下的扩散近似 - Validity of the diffusion approximation in determining the optical properties of biological
漫射近似在测量生物组织光学性质中的适用范围 - Using the method of stochastic analysis , we demonstrate c - tightness of the scaled queue length processes and derive a sufficient condition for the existence of the diffusion approximation under a general priority service discipline
在优先服务原则下，给出了这类网络的标准化队长过程扩散近似存在的充分条件。 - In the section 2 , firstly based on the diffusion approximation theory , the temporal characteristics of the reflectance and the transmittance were theoretically analyzed in turbid tissues ; secondly , the curves were simulated that the intensity and the pulse shape of the time resolved reflectance and transmittance versus the absorption a , the scattering s and the anisotropy coefficient g in two different boundary conditions : semi - infinite turbid media and homogeneous slab ; at last , the optical properties can be derived from the curves ; in the section 3 , the conditions of ultra short laser pulses of different pulse - width and shapes has been theoretical analyzed and calculated , besides , the simulated the curves of the intensity and pulse shapes of the reflectance and transmittance in a homogeneous slab are obtained for use and future studying
第二章中首先根据漫射近似理论对超短脉冲在以生物组织为典型的混浊介质中传输进行了理论分析，然后对两种边界条件下产生的漫反射、漫透射光脉冲强度和形状随各光学特性参数的变化情况进行了数值模拟，最后得到了混浊介质的光学特性参数与漫反射、透射脉冲强度与形状的关系曲线。第三章对不同形状和脉宽的脉冲光源入射到混浊介质中产生的漫反射、漫透射脉冲的强度和形状进行了理论分析和数值模拟，并将高斯脉冲与方波脉冲情况进行了对比，得到了各种情况的漫反射、漫透射脉冲强度、形状与各光学特性参数的关系曲线，这对从分析脉冲形状中提取介质的光学特性参数的信息有重要的意义。 - Then the model is simplified , the theory of martingale , simulation , and diffusion approximations are discussed firstly . these methods are applied in the model . then get some useful results , so we can estimate the upper bound for the ruin probability and the approximation of the finite time ruin probability
并详细的讨论了模型有限时间内破产概率和最终破产概率的估计，应用随机过程序列弱收敛，鞅以及随机模拟等理论，得出一些有意义的结果? ?在有限时间内破产概率的逼近表达式；最终破产概率的上界和有限时间内破产概率上界；有限时间内破产概率的随机模拟算法；并得到最终破产概率满足的泛函方程。