分布系数

The transient natural convection and natural convective heat and mass transfer under constant-flux condition were also studied respectively. In experimental research, the electrochemical method was used to analogize natural convection in a porous enclosure.

在实验研究中，采用电化学方法，在多孔介质封闭腔体的两竖壁间建立浓度梯度和温度梯度，实验测量了腔体内的温度分布和电极间的极限电流，以此确定了总体的传热系数和传质系数。

Improvement of MT migration tomography technology Based on the immanent relationship between tomography purpose and suitable frequency segment selection, we raise an entire frequency segment multi-parameter tomography scheme of MT finite difference migration. We establish a mathematical relationship among apparent electromagnetism reflectance, migration reflectance, background resistivity and the true resistivity distribution. After the introduction of TE/TM mode superpose rate, we carry out the associated resistivity tomography of two polarization mode to adapt the practical data interpolating situation.

大地电磁偏移成像的改进：针对频段选择和成像效果的内在关系，提出全频段、多参数有限差分偏移的解决方案；构建视反射系数、偏移反射系数、背景电阻率与实际电阻率分布的数学关系实现偏移电阻率成像；同时引入TE、TM模式加权因子以实现两个模式的联合偏移电阻率成像，更好的适应解释工作需要。

To calculate the effective diffusivity of benzocaine, it requires knowing the dependence of benzocaine diffusivity on ethanol concentration and the ethanol concentration profile across membrane.

要计算有膨润梯度下benzocaine在膜中的扩散系数，必须先知道乙醇在膜中的浓度分布，及均匀膨润下扩散系数与乙醇浓度间的关系。

The statistics of the contourlet coefficients of natural images in detail and model contourlet coefficients using non-Gaussian bivariate distribution that captures their interscale dependencies are studied.

详细分析了图像contourlet系数的统计特性，并利用非高斯双变量分布对系数层间相关性进行建模。

Consider the dependencies between the coefficients and their parents, a non-Gaussian bivariate distribution is given, and corresponding nonlinear threshold function is derived from the model using Bayesian estimation theory. According to non-subsampled Contourlet transform and bivariate threshold function, a novel Non-Subsampled Contourlet Transform based on Bivariate threshold function for image denoising is proposed. This scheme achieves enhanced estimation results for images that are corrupted with additive Gaussian noise over a wide range of noise variance.

该文依据非下采样Contourlet分解系数与其父系数之间的相关性，给出非高斯双变量分布，对该模型应用Bayes估值理论推导得到相应的非线性双变量阈值函数，综合非下采样Contourlet分解和双变量阈值函数，提出一种基于双变量阈值的非下采样Contourlet变换图像去噪方法。

Overlapped sprinkler water distributions were tested to determine the relationship between Distribution Uniformity and Christiansen Uniformity Coefficient.

利用多喷头组合喷洒试验研究了分布均匀系数DU 与喷灌均匀系数CU 之间的关系。

The results show that the probability distribution characteristic of the vertical permeability coefficient in fissured rock zone is much close to the log-normal distribution.

结果表明，同正态分布和均匀分布相比，裂隙岩体地区的垂向渗透系数更接近对数正态分布。

MARC. And also the influence on final thickness distribution of surface friction of preforming die and forming die was analyzed.

MARC有限元模拟研究了不同形状的预成形模对深筒形件侧壁厚度分布的影响，并分析了预成形模和终成形模的表面摩擦系数分别对成形件壁厚分布的影响，提出了模具型面变摩擦控制厚度分布的方法。

The probability grading for quantitative characters 400 large-flowered cultivars were chosed and their eighteen chief quantitative characters were tested and recorded according to the test method of morphological characters in the .The empirical distributions were determined by nonparametric test after the distribution range,mean value and variation coefficients of these characters were calculated and frequency diagrams were drawn.

数量性状分级选择代表性强的400个大菊品种，参照《菊花DUS测试指南》的形态性状测试方法，检测其18个主要的数量性状，并对性状的分布范围、平均值、变异系数进行统计计算，在此基础上，绘制了分布频次图，结合非参数检验判断性状的分布类型。

Considering the fuel salt flow effect of the molten salt reactor, the neutron dynamic model was derived based on the particle conservation equations, and the critical problem was calculated by numerical method under three working conditions to study the flow effect to effective multiplication factor, fast neutron, thermal neutron and delayed neutron precursors distribution.

考虑新概念熔盐堆燃料盐的流动特性，从基本的粒子守恒方程出发，推导了熔盐堆的中子动力学模型，并采用数值方法对3种工况下熔盐堆的临界问题进行计算，考察流动对有效增殖系数、快中子分布、热中子分布及缓发中子先驱核分布的影响。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。