离散分布

The study of this dissertation involve in three aspects as follows:analysis ofproduction-inventory systems;reliability analysis of the retrial queueing system;and the limiting distribution of the residual lifetime of discrete-time Markovianrepairable system.

本文的主要工作可分为三部分：生产库存模型存储水平的稳态分析；重试排队系统的可靠性分析；离散时间可修系统剩余寿命的极限分布。

The neural networks correction method combining the local map with radial based function networks and the global map with linear transform was applied to calculate the deformation resistance of the strip and the friction coefficient in the rolling deforming region.

采用径向基函数的局部映射和全局线性映射相结合的神经网络校正模型求解带钢变形抗力和轧制变形区的摩擦因数；并采用轧制变形区离散化方法分析轧制变形区内张力、摩擦力及金属变形抗力等在带钢轧制方向上的分布规律，从而建立轧制力在线计算数学模型。

The thesis mainly completes the transient analysis and dynamic response calculation. It obtains the datas of drilling well places for many times in order to get the value of hook loads and establishes the modal of logarithmic normal distribution at hook loads as statiscic variables.

通过到现场进行数据采集，获得了大钩的载荷值，以大钩载荷为统计变量，建立对数正态分布模型，以离散的统计特征值来代替连续的实际载荷历程，编制得到动态研究所用的试验用程序载荷谱。

This method constituted a discrete dynamic moving average model in state space and further adopted 2 algorithm to precisely compute Markov parameter matrix in the identification model.

基于状态空间描述建立了离散动力系统滑动平均模型，并应用2算法精细计算了系统模型的马尔科夫参数矩阵，给出了全局时间域内多点分布动态载荷识别问题的精细识别模型。

At last, through the analysis of the T-stress, it is concluded that the T-stress plays an important role for the oriented microcrack cases. It is necessary to consider the effect of the T-stress in determining the shielding or amplification effect of the oriented microcracks.

最后，本文采用离散模型研究了各向异性材料主微裂纹干涉问题中T应力对主裂尖应力强度因子的影响：T应力对主裂尖应力强度因子的影响是不能被忽视的，这种影响不但与微裂纹的几何分布有关，而且还与T应力的大小和符号有关。

By using the method of moments ,the integral equation can be discretized into matrix form.

建立起反演积分方程，将积分方程离散化为矩阵方程，用迭代方法求解目标区电导率分布。

First of all, this paper establishes the simulation method for fluctuating wind with a multivariate normal distribution model and an autoregressive filter. On the basis of simulation results of the wind field, the time dispersion of the buffeting forces by turbulent wind is achieved.

首先，本文利用多变量正态分布模型并结合线性滤波法的自回归模型建立了脉动风的仿真模拟方法，从而实现了对紊流抖振力的时间离散。

Based on Kogelnik's one-dimensional coupled-wave theory and dispersed Fourier transform, the diffractive characteristic of two pieces of volume phase gratings, which are cascaded and having orthogonal grating vectors for the continuous-wave laser beam, is analyzed.

利用Kogelnik一维耦合波理论，以及离散傅里叶变换，分析光栅矢量相互正交，且串联级联放置的两透射型体相位光栅对空域任意分布的连续激光光束的衍射特性；讨论其对入射光束的空间低通滤波性能，并具体模拟其对畸变高斯光束空间低通滤波的效果。

Using normal distribution transform probability model to represent a laser range scan.Not need features corresponded,but transform the discrete scan date to the piecewise continuous and differentiable probability density function,and using Newton's algorithm to optimize scan matching,so can build the 2D global map.

利用正态分布转换概率模型来表示激光扫描，不需利用特征对应，而是通过将扫描得到的离散数据点转换成分段连续可微的概率密度函数，并利用牛顿优化算法来进行扫描匹配，从而建立2维全局地图。

On the basis of the previous work, further study on DFN stochastic modeling was made in this paper. Space Variable Probability Method was used to account for the effects of the local faults on distribution of fractures. Circular Statistics was applied for fracture orientation data analysis.

在前人工作的基础上，对离散裂缝网络随机建模方法做了进一步的研究：考虑了局部断层等不连续面对裂缝分布的影响，采用空间变概率的方法确定裂缝位置；采用循环统计方法分析裂缝产状数据。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。