分布参数

The nonparametric statistic method was also used to systematically analyze the soil physiochemical properties and the environmental risk of birth defects,combined with analysis.

为研究土壤性质在出生缺陷环境风险中的指示作用，考虑了区域人口分布和疾病空间结构，使用Bayesian方法，对山西省和顺县连续4年的神经管畸形发生的数据进行了处理，并使用非参数统计的方法，结合土壤环境过程机理，对土壤的理化性质和出生缺陷的环境风险做了系统分析。

This nonparametric test was preferred, because no assumptions about the underlying distributions are necessary.

这是首选的非参数检验，因为没有任何假设的基本分布是必要的。

The significance of group differences was tested using Student's t-test or Wilcoxon-Mann-Whitney U test in nonparametric distributions.

组别差异的显著性在非参数分布下使用Student的t测试或者Wilcoxon-Mann-Whitney U测试进行测试。

METHODS: Construct proper accumulation normal distribution function form and fit with our experimental data, then compare with the common 4-parameter equation fitting.

构建累积正态分布函数的适当表达形式，对作者实验室所获得的实例数据进行拟合，同时与常用的四参数方程拟合进行比较。

METHODS Construct proper accumulation normal distribution function form and fit with our experimental data,then compare with the common 4-parameter equation fitting.

方法构建累积正态分布函数的适当表达形式，对实验所得数据进行拟合，同时与常用的四参数方程拟合进行比较。

The validity of simulation results were tested by experiments. Through statistical analysis, the parameter (μ,σ2) of normal distribution function of the maximum load, and tested uniformity of the normal population and the sample were obtained.

在此基础上，随机生成200个典型海底地形，对采矿头截齿最大载荷的分布特性进行研究；应用置信度为0.95的柯尔莫哥洛夫斯米尔诺夫(Kolmogorov-Smirnov)检验验证参数估计所得的正态总体与样本数据的一致性。

Especially, the Hill coefficient is considered not any physiological meanings in the mathematics model usually used in fitting pharmacodynamics S dose-effect curve, but the analogous parameter in the accumulation normal distribution function has definite physiological meanings, and indicate the relationship between pharmacology and pharmacodynamics.

特别地，在常用于药效学S型剂量效应曲线拟合的数学模型中，其Hill系数被认为没有任何生理学含义，而累积正态分布函数中的相应参数却有明确的生理学含义，从数学上体现了药理与药效的内在联系。

One of the two parameters that describe a normal distribution.

标准差 --描述数据的波动，是描述正态分布的两个参数之一。

At present,the hybridization of Differential Evolution with local search method confines to DE with a crossover based local search method.A novel differential evolution algorithm with best-individual based Local Search strategy is proposed.In LSDE,a normal distribution operator is introduced to automatically modify search length,and time-varying factors are introduced to modify the two parameters of DE.

针对目前差分进化与局部搜索相结合仅局限于基于交叉的局部搜索的方法，提出了一种基于最佳个体局部搜索策略的差分进化算法，并引入正态分布算子自动调整搜索步长和时变差分进化因子调整DE的两个参数。

It is worthy to mention that the extracted nucleon density distributions of 〓N and 〓N by this method are not sensitive to the model parameter.

值得指出的是，用本文方法提取的〓N、〓N核子密度分布，对所用理论模型参数十分不灵敏。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。