抽样效率

冬小麦种植面积空间抽样效率影响因子分析

Analysis of influence factors about space sampling efficiency of winter wheat planting area

应用该方法可以大大提高小概率事件的抽样效率，文中给出一组仿真结果对照。

Using the way , the sampling efficiency for small-probability events can be improved considerably , as can be seen from the contrasts shown in a group of results of simulation .

为了有效的减少误差并提高抽样效率，本文综合运用了二阶抽样、分层抽样和随机抽样等多种抽样方法来对非重点用户进行抽样。

In order to effectively reduce the errors and improve the efficency of sampling , several sampling method , including multi-objective stratified sampling , two-stage sampling and random sampling , are utilized in this dissertation .

减少方差法是提高蒙特卡洛抽样效率的方法。本文结合实例分析了三种不同的计算方法用于计算球罐模糊失效概率，其计算效率都高于直接抽样法

A random spot check with reduced variance is a method to improve the efficiency of Monte Carlo In this paper , three different way was discussed to calculate the dim probability of unavailable for ball container

另外为了提高抽样效率，本文介绍了蒙特卡罗重要抽样法的计算原理及其验算点的选取问题，并为重要性抽样法设置双参数来控制其抽样次数上、下限。

Furthermore , in order to promote sampling efficiency , computing theorem and selecting checking point of Monte-Carlo important sampling method are introduced in this paper , and two parameters are put forward for Monte-Carlo important sampling as maximum value and minimum value of sampling times .

中国黄牛品种基因频率抽样估计效率的研究

Studies of efficiency of sampling estimation for gene frequencies in Chinese cattle breeds

分层抽样框效率

On the efficiency of stratified sampling frames

对不同抽样设计效率的比较

Comparison of the different sampling designing efficiency

同已有的最好的方法比较这些随机抽样方法的效率均有提高。

The efficiency of these new random sampling methods is high in comparison with the best of the existing methods .

同时，为提高人群血吸虫病抽样调查的工作效率，本文在该省第四次血吸虫病抽样调查中探讨了滤纸血片法采集血样的应用，结果简述如下。

Meanwhile , to promote the work efficiency , the method of blood sample absorbed on filter paper was probed into the epidemiological survey in the fourth sampling survey of Hubei province in 2004 . The results are briefly introduced as below . 1 .

通过对抽样的制造企业效率的排序，考察中国制造企业生产效率相互之间的差异，找到影响其生产效率的主要因素，并对其影响权重应用层次分析法进行分析，提出相应的解决方法。

Based on ranking the chosen manufacturing industry enterprises ' efficiency we studied the productivity efficiency differences between each enterprise , trying to find the impact factors of manufacturing productivity efficiency and analyze the hierarchical weight by using Analytic Hierarchy Process , and eventually the corresponding solution is proposed .

同其他的抽样方法一样，为提高抽样效率，需进行重要抽样。

To improve the simulation efficiency and accuracy , important sampling is necessary .

在抽样调查的设计中纯随机抽样是效率不高的方法，而分层抽样可提高效率和结论的可靠性。

As we all know , for the sample survey in the design , Pure Random Sampling is not an efficient way , but Stratified Sampling can improve the efficiency and the reliability of conclusions .

由于审计抽样风险的控制涉及到注册会计师抽样的效率和效果，对审计结论的做出有较大的影响，因而在实际审计工作中量化控制审计风险显得很有必要。

The control of audit sampling risk concerns the efficiency and effect of audit , and has great impact on audit conclusion , so it is necessary to control audit sampling risk in quantity .

提出了Latin抽样与分层抽样相结合的复合抽样方法，对于提高抽样精度和效率都有较为明显的作用，特别适用于结构裂纹概率的仿真和其它应用工程仿真计算。

The paper proposes Latin sampling combined with the stratified sampling of variance reduction technique to calculate accurate fracture probability .

研究表明景观特征边缘密度（Li）优于抽样框内面积直接作为分层因子的分层抽样，有效地提高抽样效率和实际调查的工作效率。

The results also show that landscape features Edge Density ( Li ) is better than area directly as a stratified sampling frame . ( 3 ) The spatial stratified sampling methods based on the HJ remote sensing images and Field survey plots can effectively improve efficiency and sampling accuracy .

对于含有隐式极限状态方程的问题，重要抽样方法将大部分的计算时间用于结构有限元分析，这使得重要抽样的计算效率被大大降低了。

For the reliability analysis of implicit limit state function , finite element analysis is a time-consuming process , and it impedes the application of normal importance sampling approach ( ISA ) .

该项抽样技术体现了分层抽样与交叉抽样的有机结合，有利于提高抽样调查的估计效率。

This sampling technique shows the organic combination of the delaminated sampling and the intercrossing sampling , which is in favor of raising the estimation efficiency of the sampling survey .