课外活动反映了皮尤研究中心育儿方式的差异，这是从对全国1807名家长的代表性抽样调查的结果。
Extracurricular activities reflect the differences in child-rearing in the Pew survey, which was of a nationally representative sample of 1,807 parents.
提出了基于重要性抽样的最大似然方位估计方法。
Maximum likelihood DOA estimator based on importance sampling (ISMLE) is proposed.
本文提出一种近似重要性抽样方法来计算结构可靠度。
In this paper, the approximate importance sampling technique is presented for structural reliability evaluation.
进一步研究了采用重要性抽样技术提高抽样效率的问题。
And the importance sampling technique is applied to improve the sampling efficiency.
提出了基于重要性抽样的贝叶斯最大后验概率方位估计方法。
Bayesian maximum a posterior DOA estimator based on importance sampling (ISBM) is proposed.
在用蒙特卡罗法计算结构系统可靠性时，运用了系统描述性抽样法。
Structural system reliability is dealt with by Monte Carlo integration using systematic descriptive sampling is applied instead of the random sampling in the Monte Carlo procedure.
在期权定价的蒙特卡罗模拟中，重要性抽样是一种有效的方差减小技术。
Importance sampling technique is an effective variance reduction technique in Monte Carlo simulation method for pricing options.
她的结论是基于一项对11473名美国人进行的全国性抽样调查得出的。
Her information is based on a nationally representative study sampling 11,473 Americans.
在综合双侧规格限下研究方差未知的正态分布产品可靠性抽样检验方法。
This paper studies reliability sampling inspection method for items whose quality characteristic has a normal distribution with an unknown variance under double combined specification limits.
本文给出了制订定时截尾下指数分布产品可靠性抽样检验方案的统计方法。
This paper gives a statistical method of working out reliability sampling inspection plans for items whose failure times are distributed as exponential distributions.
文摘：在用蒙特卡罗法计算结构系统可靠性时，运用了系统描述性抽样法。
Abstract: Structural system reliability is dealt with by Monte Carlo integration using systematic descriptive sampling is applied instead of the random sampling in the Monte Carlo procedure.
方法：采用统计调查研究方法，对全国范围内的在职医院护士(师)进行典型性抽样问卷调查。
METHODS: Statistical method like questionnaires was used to investigate the clinical nurses (or chief nurses) nationwide at random.
根据可靠性抽样理论，分析了过载继电器的可靠性试验方案，研制了过载继电器可靠性试验装置。
Based on the reliability sampling theory, the reliability examine plan of overload relay was analyzed and the test device was developed.
针对非线性、非高斯系统状态的在线估计问题，本文提出一种新的基于序贯重要性抽样的粒子滤波算法。
In this paper, a new particle filter based on sequential importance sampling (SIS) is proposed for the on-line estimation problem of non-Gauss nonlinear systems.
在该研究中，通过全国性抽样调查，他们每年随机选定5000名芬兰人邮寄问卷收集自我报告的饮酒情况。
In this study, self-reported drinking was collected through a nationally representative survey mailed annually to 5, 000 randomly selected Finnish citizens.
在失效模式基础上提出剩余电流动作保护器的可靠性指标，并根据可靠性抽样理论提出其可靠性验证试验方法。
The reliability index was applied on basis of the analysis on the failure mode. And according to the sampling theory of reliability a reliability test method was put forward.
首先，本文简单介绍了几种随机模拟方法，并对重要性抽样作了改进，从而为选取好的重要函数提供了方法和理论依据。
First, some random simulations are introduced and the important sample is improved, which supplies the method and theory for the choice of the important sample.
文章利用2000年人口普查和中国城乡老年人口状况一次性抽样调查资料，对中国老年人口数量、生活状况和贫困发生率进行分析。
This paper depicts the status of living of Chinese elderly and estimates the poverty rate of this group of population, by using data from 2000 Census and 2000 China Urban and Rural elderly Survey.
根据2000年“中国城乡老年人口状况一次性抽样调查”所得的有关数据，剖析了我国农村老年人在物质、精神和文化三大方面的基本现状。
Based on the 2000's sample data, the paper analyzes old people's current living situation in China from the aspects of material, spirit and culture.
方法：采用目的性抽样和方便抽样，对广东、江苏、陕西、甘肃、北京等省市共9所公立医院12名妇产科医务人员展开半结构式个体深入访谈或集体访谈。
Methods:An in-depth, semi-structured interview or focus group interview with 12 health workers in Gynecology and Obstetrics Department of 9 public hospitals was conducted.
抽样问题：有关源和代表性样品的证据，你的听众和您使用的是形成清晰的推论并得出结论。
Sampling issues: clarity about the source and representativeness of samples of evidence that your audience and you are using to form inferences and draw conclusions.
并且CDC拥有一个医务人员的网络，这些医务人员常规性的对病人抽样并测试，以检验他们携带哪些可能在社会中流行的致病体。
And the CDC has a network of physicians who routinely sample and test patients to see what bugs they have and might be circulating in the community.
考虑到为启动有针对性的——权且不提地毯式的——全球级免疫规划所需的努力和资金，单靠哨点抽样是不够的。
Given the amount of effort and funds needed to launch a targeted - let alone a blanket - immunization programme at the global level, sentinel sampling is not enough.
如果想通过电话调查提供有效、可靠和有代表性的数据，现在有必要开展移动电话抽样和采访工作。
Sampling and interviewing respondents by cell phone is now a necessity if telephone surveys are to provide valid, reliable and representative data.
ADC的前提是根据抽样的一小部分表数据自动创建一个代表性的压缩字典。
The premise behind ADC is to automatically create a representative compression dictionary based on sampling a small subset of table data.
这种数据的准确性取决于很多因素，例如采用的抽样算法的类型、抽样的数量和数据的歪斜情况。
The preciseness of this data depends upon a large number of factors such as the type of sampling algorithm used, the number of samples taken, and the skew of the data.
如果您是为整个公司设计架构的话确保您所运用的抽样都是公司富有代表性的。
If you create a framework for the entire organization, make sure you use a sample of roles from across the company.
在巴西这样一个国土辽阔，差异巨大而又不公平的国家进行具有代表性的抽样民意调查可谓艰难。
It is hard to construct a representative sample in a country as large, diverse and unequal as Brazil.
总之，统计信息的准确性取决于抽样率、数据倾斜(data skew)以及用于数据抽样的数据群集。
In summary, the accuracy of statistics depends on the sampling rate, the data skew, and data clustering for data sampling.
总之，统计信息的准确性取决于抽样率、数据倾斜(data skew)以及用于数据抽样的数据群集。
In summary, the accuracy of statistics depends on the sampling rate, the data skew, and data clustering for data sampling.
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