分布系数

Based on the higher order refined shell theory of Reddy type, the assumption that transverse shear deformations vary parabolically in the thickness direction and vanish both in the bottom and top surfaces of the shell is applied and coefficients of higher order terms in the formulation can be determined.

在Reddy型高阶壳体理论的基础上，假设横向剪切变形沿壳体厚度呈抛物线分布并在壳体的上下表面上为零，进行高阶量系数的求解。

According to the phytosociological theories and methods of Braun-Blanquet's school, the regional savanna vegetation of the dry-hot valleys of Yuanjiang river had been investigated. Based on the principle of fidelity degree, the typical 110 releves taken from every sampling stands of the dry-hot valleys were sorted up from below to upper into 15 Associations, then into 5 Alliances, 2 Orders and 1 Class. A synoptic classification system of Class-Order-Alliance-Association was established for the purpose to reflect deeply the characteristics of all syntaxa there in the aspect of plant component and their abundance-dominancy, presence, cover coefficient, life form, growth form, and ecological environment, community structure, species types and so on.

采用Braun-Blanquet植物群落学研究的理论与方法，对云南元江中上游干热河谷分布的植被进行考察研究，把各处取得较典型的110个样地记录按确限度的原则由下而上归类成15个群丛、5个群属、2个群目和1个群纲，建立了元江干热河谷萨王纳植被群纲—群目—群属—群丛分类系统综合表和15个群丛表，以全面深入反映全干热河谷植物群落各级分类单位中各植物种类组成的多优度、存在度、盖度系数、生活型和生长型等特征及其群落结构、生态环境和种型类别。

The coverages and densities of Plantago virginica populations in different inhabiting periods in the campus of Zheijiang Normal University were surveyed by the successive sampling.

采用连续样方法，分别调查了浙江师大校园内不同定居阶段和生境特点的北美车前种群密度和盖度，以此为基础，计算了北美车前种群分布的偏离系数，并进行了种群的格局规模和格局纹理分析。

Occurrence records from 1864 locations and 34 environmental variables from Daymet datasets were gathered, four modeling methods including Logistic Regression, Classification and Regression Trees, Genetic Algorithm for Rule-Set Prediction and maximum entropy method were used to generate potential geographic distributions for Dreissena polymorpha in the continental USA. Then three statistical criteria including area under the Receiver Operating Characteristic curve, correlation and Kappa were calculated to evaluate the performance of the models, followed by analyses of major variable contributions.

论文以1864个美国外来入侵物种斑马纹贻贝定点发生数据和开放式基础地理信息数据库Daymet的34个环境变量为主要信息源，采用逻辑斯蒂回归、分类与回归树模型、基于规则的遗传算法、最大熵法4种途径，建立美国大陆部分潜在生境预测模型，从接受者运行特征曲线下面积、Pearson相关系数、Kappa值3个方面来检验模型预测精度，在此基础上分析斑马纹贻贝的空间分布规律及其环境影响因素。

The difference, relative variation of modular number and mass and their frequency distribution were analyzed between treatments, and within and among structural levels of genet, ramet and tiller in grazing experiment.

在放牧实验中，分别以矮嵩草源株、分株和分蘖层次为单位，对其构件单元的数量和生物量、变异系数、频率分布在处理间的差异和相对变异性进行分析；在模拟放牧实验中，分别就无性系内刈割和未刈割部分从这3个层次上比较了构件数量和生物量在处理间的差异和相对变异性，所得结果如下

The lower the partition coefficient existed, the more easily the remobilization of heavy metals from sediment particles occurred.

分布平衡系数kD愈小，代表重金属愈易释出，锌及镍比铅及铬更易於释出到孔隙水中，而铜最不易释出到孔隙水中。

The results also show that as the hardening coefficient decreases, the transitionally zone becomes larger and the distribution of the stress in the yield zone becomes more plat.

本文的结果还表明，硬化系数越小，过渡区(弹塑性奇异应力场支配区到屈服边界)越大，屈服区域应力分布变得平坦。

FEBEM is used in the study of flow field and transmissibility coef ficient of karst groundwater in Taiyuan area.

应用有限单元和边界单元耦合方法研究了太原岩溶地下水系统的流场以及导水系数的分布。

In this paper,we use geostatistics to analyse special variability of soil salinity in Yanqi Basin of Xinjiang base on soil salinity data,and then we predict and draw the soil-salinity-class maps including unsampled region,it shows: the soil salinity data's Cv are not less than 100% and have very strong special variability;the spherical model f...

在焉耆盆地大规模的土壤取样、试验分析盐分数据的基础上，采用地统计学的方法对研究区的土壤盐分进行了空间特征变异分析，并采用普通克里格插值法制作出焉耆盆地的土壤盐分空间数字地图，结果表明：研究区各层土壤盐分变异系数均大于100%，具有强空间变异性；对土壤盐分进行半方差函数计算分析，发现拟合的理论模型均为球状模型，各层土壤盐分表现出强烈的空间相关性；土壤盐渍化程度在水平方向的分布与地形地势的关系密切，在垂直方向则表现出强烈的表聚特性。

The "yes" or "no"(1 or 0) of distribution of amphibians in Guangdong Province were regarded as two-state character. The relative coefficient was taken for the similar degree of amphibians in ever two zoogeographical provinces.

将各种两栖动物在各动物地理省分布的有或无作为二元状态，用结合系数来表征每两个动物地理省同两栖动物组成的相似程度，以类平均法进行聚类。

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％。