The probability density distribution of + conforms to the lognormal behavior 低速带间距的概率密度分布可用对数正态分布来描述。
The joint probability density distribution ( pdf ) of the velocity fluctuations falls along the directions of - u + v and + w - v especially for fine particles 联合概率密度主要沿一u v和十u ? v方向分布,粒径较小的颗粒更为明显。
The module was divided into sub - channels , and the hydrodynamics in each channel was just the function of the local cell packing fraction . based on the theoretical probability density distribution functio 在装填密度较小的时候,紊流倾向十分明显;当装填密度较大的时候,壳程的流动状况与层流相对比较接近。
The probability density distribution of the particle velocity fluctuation differs in different flow regions , and is approximately normally distributed where the space restrictions are small . velocity fluctuation of particles with different sizes is similar 颗粒脉动速度的概率密度分布随流区有所差异;在空间尺度影响较小的范围接近正态分布;各种粒径的颗粒脉动速度具有相似的特性。
Abstract : based on analysing factors resulting in the error from scanline survey on joint trace lengths , the actual process of scanline survey was simulated by the computer . the results show that , except the well - known factors resulting in the error from scanline survey on joint trace lengths , the probability density distribution of joint size also influences the precision of scanline survey of joint trace lengths 文摘:在分析导致节理迹长测量误差诸因素的基础上,用计算机对线测量的实施过程进行了模拟研究,结果表明,除了众所周知的导致节理迹长测量误差的因素外,节理长度概率密度分布形式对节理迹长测量误差也有影响
The motion characteristics of the suspended particles were obtained by statistical analysis , including vertical concentration distribution , mean velocity profile , turbulent intensity , velocity correlation , and the probability density distribution of the velocity fluctuations . attempt has also been made to interpret the turbulent characteristics in terms of particle properties and turbulence structure 对不同容重、不同粒径的颗粒在不同水流条件下的垂线浓度分布、平均速度和脉动强度分布、相关函数及脉动速度的概率密度分布等进行了全面系统的统计分析,得到的中文摘要主要成果如下:
Current . in order to make diffluent piers with low ridge to be popularized and applied , the surface wave of low fr . current is chosen as the research object . we measure the surface wave elements and the velocity distribution of various diffluent piers scheme by the experiment of physical model . we also analyze the average wave height , the the average value of the square of wave , unit width of the wave ' s energy , the probability density distribution of wave height , and the power chart character , so as to reveal the weakening wave mechanism of the diffluent piers 低fr水流的核心是波浪问题,为了低坎分流墩的推广应用,本研究以低fr水流的表面波浪作为研究对象,通过物理模型试验,对各种分流墩方案消能工的下游水面波浪要素、流速分布进行测试,分析低坎分流墩下游波浪的平均波高、均方根、单宽波能、波高概率密度分布及功率谱特性变化规律,从而揭示了低坎分流墩的削波机理。