查询词典 discrete distribution function

The new calculation method of structural surfaces with different scales is given on the basis of block discrete element method in which contacts face to face. Moreover, a new discrete element model for simulating rock and soil blasting problem is built. The elements of new model can be split by itself in the program. There are small scale blocks around the charge, and large scale blocks are adopted in far zone.

在块体离散元面－面接触的基础上，给出不同尺度结构面的计算方法，建立离散元对岩土爆破模拟的计算模型，实现块体白分裂计算程序，在药包附近采用小尺度块体，远区采用大尺度块体，可以更为准确地描述爆破载荷下岩体结构面的尺寸效应。

Firstly, two examples, which belong to static analysis and dynamic analysis respectively, were given to show the effectiveness of discrete element method. Then the discrete element method was used to perform dynamic analysis of the Chinese 1 km deep-ocean mining system. The dynamic performance of the entire mining system under different current directions was discussed and compared with that from finite element method.

首先，从静态分析和动态分析两方面，给出2个典型算例，证明该方法的有效性；然后，将离散元方法用于中国1 km深海采矿系统的动力学分析，讨论不同海流方向下整体系统的联动性能，并与有限元方法进行对比。

One difference is that memetics' focus is on the selection potential of discrete replicators, where DIT allows for transmission of both non-replicators and non-discrete cultural variants.

一个不同之处在于，模因论的重点是离散复制物的选择潜力，而双继承理论承认非复制物和非离散文化变体两者的传播。

Secondly, two physical models were constructed, which could model rough surface and describe the features of the earth surface, such as chine, neck, valley and hill, etc. According to difference method, the ""true"" volume of the physical models were measured, which was 13260cm3 and regarded as the analysis foundation of the precision of the volume that was calculate by DEM. The discrete dada of the models on a regular spacing of 1cm were collected by 3SPACE FASTRAK and the DEM was obtained by interpolating the discrete dada through GIS software. Based on the volume of the models calculated by DEM, different interpolating methods (IDW, Spline, Natural Neighbor, and Kriging) and variation of grid spacing of data were compared and their effects on precision of volume calculation were analyzed.

构建了可模仿凸凹不平地形表面的实体模型，该模型能够表征山脊、山尖、山涧、丘陵等地形特征；根据体积差减法测量实体模型的体积作为数据精度分析的体积&真值&，该值为13260cm~3，作为采用DEM进行体积计算的基准值；利用精度为0.08cm的三维数字化仪采集间距为1cm的离散数据点，对离散数据点用GIS软件进行内插处理生成DEM模型，通过DEM计算出模型的体积，探讨不同内插方法(IDW、Spline、Natural Neighbor和Kriging)和数据格网间距变化对体积计算精度的影响。

The discrete-element modeling is a new dynamic modeling method in structural geology and geophysics research. The authors built a discrete element model to simulate the evolution of the fault system in active salt domes. Results show that the fault system undergoes three stages: symmetric deformation stage, asymmetric deformation stage, and complete fracture stage.

离散元模拟是构造地质地球物理研究中一种新的动力学模拟方法，作者通过构建离散元模型，模拟了主动底辟盐构造断裂系统的演化过程，结果表明，该断裂系统的发育主要经历了对称变形、不对称变形、整体破裂三个阶段。

A new non-linear quadratic programming Bayesian prestack three-terms inversion method is developed; Firstly, this method is based on Bayesian parameter estimation theory, Gaussian distribution is used for likelihood function and modified Cauchy distribution is used for prior distribution; Secondly, covariance matrix is used to describe the degree of correlation between the parameters; rock physics relations are used to constrain the inversion results; at last, this method is transformed into non-linear quadratic programming problem, and inversion results are acquired under several constraints.

本文提出了一种基于非线性二次规划的叠前三参数反演方法。首先基于贝叶斯参数估计理论，假设似然函数服从高斯分布，并使待反演的参数服从于改进的Cauchy分布，从而提高了反演结果的分辨率；其次用协方差矩阵来描述参数间的相关程度，进一步提高了反演结果的稳定性；最后将问题转化为一个非线性二次规划的求解问题，并在多种约束下得到问题的解。

The research shows that gas concentration shows generally an increasing tendency along the working face airflow direction, from 0.095% to 0.18%, under the effect of gas drainage points, up-and-down changing locally; gas distribution in a transect of working face is unequal, under the effect of gas emission, ventilation and drainage, the gas concentration near coal wall is larger than that near goaf, which is a concave function distribution within a distance of 1876.5 m from the inlet of working face, after greater than 76.5m, which is a decreasing distribution from coal wall to goaf.

研究表明，该工作面瓦斯体积分数沿风流方向总体呈逐渐增加趋势，介于0.095%~0.18%之间，受瓦斯抽放点的影响，局部有起伏变化；工作面横断面瓦斯体积分数分布不均匀，受瓦斯涌出、通风和抽放的影响，靠近煤壁侧瓦斯体积分数要高于采空区侧，在距离进风口约18~76.5 m范围内为凹函数分布，大于76.5 m之后，从煤壁至采空区为单调下降函数分布。

Precipitation distribution;Taiwan;Empirical orthogonal function;Eigenfunction;Temporal distribution;Spatial distribution;Principal component analysis

中文关键字降水分布；台湾；经验正交函数；固有函数；时间分布；空间分布；主分量分析

For a group of data collected from χ2 distribution or F distribution,it is difficult to judge where they are from if use the usual way of making image about empirical distribution function.

提出了用假设检验的方法判断一组来自χ2分布或F(m1，m2)分布数据是服从χ2分布还是服从F(m1，m 2)分布。

With traditional theory of loss distribution, the goodness of fit of the property loss distribution model depends on the choice of the experience distribution function and parameters.

依赖传统的损失分布理论，财产损失分布模型拟合的优劣往往取决于经验分布函数的选择和参数的确定。

The teacher likes the honeymouthed little girl very much.

老师很喜欢这个嘴甜的小姑娘。

Mr. Notker Bien's interests are traveling, spending quality time with the family and long-distance-running.

诺特卡·柏恩先生热爱旅游，长跑，以及和家人一起共度美好时光。