查询词典 density distribution

The relations between multivariate Poisson distribution and multinomial distribution or multivariate normal distribution are given.

最后给出了多元Poisson分布与多项分布以及多元正态分布之间的关系。

The soil pH, CEC and organic matter content ranged from 7.7 to 8.6, 11.9 to 28.7 cmolkg^(-1), and 3.0 to 27.9 gkg^(-1), and followed normal distribution, log-normal distribution, and negative binomial distribution, respectively. These three properties were significantly affected by land use type, landform, and soil type.

结果表明：黄土高原小流域土壤pH、CEC和有机质分别介于7.7~8.6、11.9~28.7cmolkg^(-1)和3.0~27.99kg^(-1)，分别服从正态分布、对数正态分布和负二项分布。3种土壤性质随地形、土地利用方式和土壤类型的不同差异很大。

The spatial distribution parameters, parameters of Iwao model and Taylor's power law were used to analyze the spatial pattern of the lavae of Argopistes tsekooni Chen in glossy privet. The results showed that its spatial pattern was negative binomial distribution, with colony as its basis component and its colony distribution was random.

应用空间分布参数、Iwao回归法和Taylor幂法进行分析表明，女贞瓢跳甲幼虫在大叶女贞上呈负二项分布，分布的基本成分为个体群，且个体群为随机分布。

We presented a method to compute the premium coefficient for each level of the scale when the claim frequency distribution is assumed to conform negative binomial distribution or the nonparametric mixed poisson distribution, the theoretic models of bonus-malus systems are applied to the practical bonus-malus systems model with limited scale by this way.

提出了当索赔次数服从负二项分布和非参数混合泊松分布时确定奖惩系统各等级费率系数的方法。

The negative binomial distribution, gamma distribution, and log-normal distribution were chosen as error distributions according to log-linear regression of variance versus log-mean of CPUE.

根据鲐鱼单位捕捞努力量渔获量数据呈正偏，以及CPUE均值与方差在对数尺度下的线性关系，选择了负二项分布、伽马分布与对数正态分布作为误差分布。

If it is not normal distribution, the distribution function can be converted into normal distribution by data transform.

脑的基本功能是接收外界信息，对这些信息作出合适的处理并作出决策或行为反应，以适应外界环境。

Use of matlab language standard normal distribution, Poisson distribution, Rayleigh distribution under the random number generation.

详细说明：利用matlab语言编写的标准正态分布，泊松分布，瑞利分布下的随机数的产生。

At present the classic least square method, which is only adaptable to the data series of normal distribution, is usually adopted in statistic calculation. However, the actual series are usually pollutional distribution instead of normal distribution.

保证监测资料的可靠性是建立监控模型的基础工作，目前的统计计算一般采用经典的最小二乘法，该方法只适合于误差服从正态分布的数据序列。

Based on the results of morphology taxonomy and themain distribution regions of Lepidium in China, these resuls that the ideal regions forintroduction mainly lay in the northeast and north of China by GRGs were basically IIconsistent with the main native distribution regions of fifteen plants of Lepidium in China.Especially the native distribution regions of L.sativum that had the nearest kinships withMaca by morphology taxonomy were totally layouted as the ideal regions for introduction.

通过灰色关联度分析所得的适宜引种区和较适宜引种区主要分布在东北、华北地区的结果与 15 种独行菜植物在中国的主要分布区基本一致，尤其是与玛咖相似性非常接近的家独行菜，它的分布地区皆被划分为玛咖的适宜引种区。

The empirical results show that the FIGARCH model based on the skew student-t distribution is better than other distribution on the assumption in estimating the value of the dynamic Var, because it is better to reflect the risk of actual rate of return and it is proved to be better to choose the skew t-distribution model through the Pearson test.

实证结果表明，基于偏态t分布下的FIGARCH模型测算的动态Var值克服了其他分布假设上的不足，能够较好的反映金融收益率的实际风险，最后在该分布下的Pearson吻合度检验也证实了模型分布选择的正确性。

Objective:To explore the feasibility of laparoscopy in diagnosing and treating of abdominal diseases.

目的：探讨腹腔镜用以诊断腹部外科疾病及选择治疗方案的可行性。

The lifetime of nylon 1010 and nylon 1010/POSS composites decreased with increasing temperature.

热重-红外联用分析表明尼龙1010在氮气气氛下的降解产物主要为小分子的低聚物，POSS并不改变尼龙1010降解产物的组成。