置信区间

If we have omitted important factors that are correlated with the explanatory variables, then the coefficient estimates are not reliable: OLS is biased.

如果存在严重的缺省变量问题，那么OLS估计就是有偏的；如果存在异方差，那么标准误就不能用于估计标准差，因而在这些问题下构造出的置信区间并不是真正的95％CI。

This study consists of three parts. Firstly the equivalently accelerative corrosive environment is determined through the analysis of statistic data of corrosion environment. Secondly the fatigue test is carried out under the constant amplitude cyclic loading for the specimens which are exposed in the corrosive environment for equivalent calendar time of zero year, 3 years, 8 years and 13 years. Four S-N curves with different corrosive time are obtained based on the fatigue experiment. Finally the regression method of S-N curves for experimental data is researched and a weighted least square fit is put forward in which the weigh of a group of test data is inversely proportional to the length of the confidence interval.

进行了以下几个方面的工作：(1)通过实测、统计、分析得到了当量加速环境谱；(2)完成了在当量加速环境谱下预腐蚀日历年限0年、3年、8年和13年的腐蚀试验，并进行了成组常幅疲劳试验，得到了不同预腐蚀年限下的S-N曲线；(3)进行预腐蚀后的S-N曲线的数据拟合方法的研究，提出了考虑置信区间长度影响的加权最小二乘法。

The results showed that the maximum lethal dosage of Datura stramonium ranged between 4 g·kg-1 and 16 g·kg-1 to Mus musculus.

结果表明，小鼠对曼陀罗的耐受量大于4 g·kg-1，小于16 g·kg-1，致死中量LD50=7.04 g·kg-1，95%置信区间为［5.75，8.62］，回归方程为Y=0.8872＋

A new growth model is derived from the logarithmic function and the power law.

通过对幂函数和对数函数的比较分析，本文构建了新的词汇增长模型，并应用此模型推导出科技英语的理论词汇增长曲线及其95%双向置信区间。

For making the new technique of tension strength testing method have the good and practical value,and avoid causing the large discreteness in the applicatin.

为了使抗拉强度检测新技术具有良好的实用价值，避免在应用中有较大的离散性、此利用这种检测方法的结果，有必要讨论在给定可靠度的置信区间。

Choosing reliability simulation data as a sample, the parameter confidence interval as coding space and the reciprocal of errors between empirical distribution function and acquired distribution function as a fitness function, the point estimation model of age distribution is established based on the genetic algorithm, and the reliability function of complex systems is acquired.

以可靠性仿真数据为寿命样本，待估计参数的置信区间为编码空间，以经验分布与所求分布误差倒数为适应度函数，建立了基于遗传算法的寿命分布参数点估计模型，求得了复杂系统可靠度函数。

In terms of error analysis (by error scatter band method and confidence limit Intervals method respectively) for the correlation between estimated PSF and measured PSF values, it was obviously founded that PSF value could be evaluated highly accurately by in strumentation method, according to the suitable empirical equation.

估算值与实际测量值所进行的误差离散性与置信区间的分析结果表明，选用合适的经验演算法可以在试验过程中即时获得高度可靠的PSF结果。

This paper advances that Bayesian methods can be used to analyze small sample or single replication simulation output data, and presents some Bayesian methods and estimating method of confidence interval of Gamma distribution.

提出用Bayes方法对小样本或单次运行的仿真输出进行分析，给出了几种条件下的Bayes方法和伽玛分布置信区间的估计方法，提出了Bayes方法中先验分布的确定方法和准则。

Focused on impact points of projectile dispersion zone, probability statistics was utilized to build mean function and gamma function,confidence was determined by probability value.

文中在对射弹散布区域的落点进行处理上采用了概率论统计方法，建立均值函数和伽马函数，通过对置信区间的概率取值来确定置信度。

The paper introduce detailed the method to decide the threshold value, and set forth the method to test the believing interborough of division result in theory.

本论文在研究区研究过程中详细的介绍了危险度等级阈值确定的方法，并对检验区划成果的置信区间作了理论上阐述。

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。