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1)  aggregate distribution density
骨料分布密度
1.
Simulation results show that the aggregate distribution density at any point in concrete converges asymptotically to a constant when the number of simulations tends to infinity, and that the shapes of aggregate distribution density curves for different aggregate areal fractions are remarkably similar, which all consist of three parts: ascending, descending and horizontal.
模拟结果表明 ,当模拟次数趋向无穷大时 ,混凝土中任一点的骨料分布密度趋近于常数 ;对于不同的骨料面积百分数 ,骨料分布密度曲线的形状十分相似 ,均由上升段、下降段和水平段三部分组成。
2.
Firstly, the wall effect of the aggregate distribution density of concrete and the formation mechanism of boundary layers were investigated by applying a simple simulation algorithm.
首先,应用一种简单的模拟算法,分析了混凝土骨料分布密度的边界效应和边界层形成机理。
2)  aggregate density distribution
骨料密度分布
1.
The wall effect on the two-dimensional aggregate density distribution for mono-sized and multi-sized aggregate is discussed in this paper.
讨论了二维单尺寸和多尺寸骨料密度分布的边界效应。
3)  aggregate distribution
骨料分布
1.
Concrete is taken as a two-phase composite material consisting of mortar matrix and aggregate on mesoscopic level in the following discussion on a numerical simulation approach for dealing with polygo-nal aggregate distributions in concrete.
应用蒙特卡洛方法将所生成的骨料分布到混凝土截面上。
4)  aggregate packing degree
骨料密实度
1.
Calculation method of aggregate packing degree based on fractal dimension;
基于分形的骨料密实度计算方法研究
5)  distribution density
分布密度
1.
The influences of grade and distribution density of diamond on the operating performances and quality stability of grinding disc are studied in this paper, through processing quartz with 600 mesh diamond disc.
以 6 0 0目金刚石微粉磨盘为对象 ,通过磨削加工水晶的试验 ,研究了金刚石品级、分布密度对磨盘使用性能和质量稳定性的影响。
2.
In this article the usual method of determining the distribution density of function of one-dimensional continuous random variable——distribution function method.
本文给出了求一维连续型随机变量函数分布密度的一般方法:分布函数法,并用分布函数法对现有文献中的计算公式进行了理论探讨,对现有的定理进行修正拓展,扩大了应用范围。
3.
As for continuous random variable, the connection of distribution function between random variable and its function - - a new random variable can be obtained first according to the definition of distribution function, then the connection between distribution densities can be obtained by derivation; thus the distribution density is solved.
对于连续型随机变量ξ来说,可由分布函数的定义先求出随机变量ξ和它的函数η=f(ξ)这个新的随机变量的分布函数之间的联系,然后通过求导,得到密度函数之间的联系,从而求得η的分布密度。
6)  density distribution
密度分布
1.
Study on density distribution of parameter ellipsoid;
参数椭球的密度分布研究
2.
Three-dimensional lithosphere density distribution beneath Chinese Sea and its adjacent regions;
中国海及邻域岩石圈三维密度分布
3.
Reconstruction of density distribution in the supersonic flow field with optical computerized tomography
利用光学层析技术重构超声速绕流流场密度分布
补充资料:概率分布的密度


概率分布的密度
density of a probability distribution

  概率分布的密度【山画勿ofa声加b正ty业州恤心.;n月。T:oeT‘,.TooeT,],亦称攀半考枣(pro恤b正tydensity) 与绝对连续概率测度相对应的分布函数(distribU-tionft川ction)的导数. 设X是在”维E切土d空间R”(n)l)中取值的随机向量,F是它的分布函数,并设存在一个非负函数f使得 x一工.F(x,,xZ,…,x。)一J…J,(。:,…,。。)“1…du,对一切实数x;,…,、。成立,则称f是X的修率窜摩(probab皿ity de飞ity),此时对任意BOrel集A cR“有 p万x。A飞=f…ff(。,.·…。_)du一d、. ‘A。任一满足条件 丁…Jf‘xl,一x·,dxl·““一‘的非负可积函数f都是某一随机向量的概率密度. 如果两个取值于R”的分别具有概率密度f和g的随机向量X和Y是独立的,那么随机向量X十Y具有概率密度h,它是f和g的卷积,即h(xl,…,x。)=一丁…丁f(x,一。,,…,x。一u。)。(。,,…,。。)以u,…J、一J…Jf(“,,…,。。)。(x,一,,…,x。一、)汉。,…d。。. 假设X=(戈,…,戈)和Y=(矶,…,气)是分别取值于R”和R用(n,m)l)中且具有概率密度f和夕的随机向量,而z=(戈,…戈,Y.,…,气)是取值于r+川中的随机向量.再若X和y独立,则Z具有概率密度h,称为随机向量X和Y的联合概率密度(joint Pro恤biljty dellsity),此处h(t:,…,t。十。)=f(tl,…,t。)g(t。+1,…,t。*.)·(l)反之,若Z具有满足(l)的概率密度,则X和Y独立. 具有概率密度f的随机向量X的特征函数中可表示为 毋(tl,…,t。)= 一丁…丁。:‘!1二‘~“·’·,f(xl,一x。,dxl·‘·“x二这里,如果职是绝对可积的,则f是有界连续函数,且 f(x:,“·,x。)=二二头二f二卜一‘:1一‘,…’,(。:,…,:。)d才,…d。· (2二)”几或概率密度f和对应的特征函数价还通过下述关系式(Phnd犯rel埠等术(Phncherel汕mtity))相联系:函数厂是可积的,当且仅当!叫’是可积的,此时有 了…歹fZ(x卫,…,、)dx,…dx。 一典丁了…}’,,(。,,…,:。)一‘tl…己t。
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