Estimation of Undetected Error Probability of Block Codes Using Importance Sampling 用重要性抽样方法估计分组码的未检概率
A type of probability sample in which aggregations of sampling units, called clusters, are sampled at some stage in the process. 是一种将样本单元聚集在一起的随机抽样法.样本群在抽样的某一步骤被抽出。
Probability and Statistics: A sampling of classic problems in probability and statistics. 机率和统计:机率和统计经典问题范例。
In this paper it not only gives the method of unequal probability in group sampling and unbiassedness of mean estimation and also gives the variance and its unbiassedness of estimation. 本文给出了集团抽样的不等概方法和均值的无偏估计,同时也给出了这种估计的方差及方差的无偏估计。
Alternative to probability sampling 概率抽样的备择方案
Probability proportional to size sampling 概率比例规模抽样法
Methods After 30 experimental spots were selected in Guangdong coastal areas and the Pearl river delta by population proportional probability sampling method, 1293 school aged children ( age 8  ̄ 10y) were conducted thyroid monitoring, urinary iodine and iodined salt measurement. 方法用人口比例概率抽样法对该地区抽取30个调查点1293名8~10岁在学儿童进行甲状腺肿大率、尿碘、盐碘调查;
The variance of sampling size is more stable than those of other probability sampling schemes. 与其他概率抽样方法相比,自适应抽样最终抽取的样本数更稳定、更可靠,并给出了最终样本数的概率分布。
Principle of pollution probability for selection of atmospheric sampling stations on coastal area 污染几率原则用于近岸海域大气采样点的选位
With the additional proportion of tracers as a criterion, the principal factor influenced is the probability of tracers in sampling. 在以示踪剂添加比例为基准时,影响的主要因素是抽取样本中示踪剂的抽取概率。
Monte Carlo simulation is a method of probability random sampling which simulates the potention of mineral resources under probability through random sampling experimen by use of the distribution curves showing known mineral resource quantity in the model region. 蒙特卡洛模拟法是一种概率抽样的方法,它是利用模型区内已知矿床资源量的分布曲线,通过抽样实验模拟出该区在某种概率意义下具有的资源潜力的方法。
The probability statistical theory and stochastic sampling modeling technology are used to establish an exploration process modeling method and dynamically study the relationship between the discovery of resource amount and the work load of exploration during the exploration of oil and gas. 本文应用概率统计理论和随机抽样模拟技术,建立了勘探过程模拟法,动态地研究油气勘探过程中资源量的发现与勘探工诈量之间的关系。
The antidotes for solving these problems in our country's public opinion survey report are the folio wings. Firstly, probability sampling should become main sampling method in public opinion survey. 解决当前我国民意调查报道中的主要问题的对策是:一是概率抽样应成为民意调查抽样的主要方式;
Admissibility of Strict π ps Sampling Scheme in Class of Unequal Probability Sampling Scheme Without Replacement 严格πps抽样方案在不放回不等概率抽样方案中的可容许性
PPS ( probability proportional to size cluster sampling) and random cluster sampling methods were used for the investigation. [方法]采用PPS抽样法和随机整群抽样法调查。
The Probability Analysis of the Sampling Inspection to the Pile Foundation Test 桩基检测抽样检查的概率分析
Review on probability and application of two sampling methods for urban storm 城市暴雨两种选样方法的概率关系与应用评述
For overcoming the disadvantage of slower convergence speed and the difficulty to apply to on-line simulation optimization of general genetic algorithms, an improved genetic algorithm is proposed by introducing ordinal optimization strategy and probability sampling idea. 本文针对遗传算法收敛速度慢,不适应复杂在线仿真优化的问题,将序次优化和概率抽样的思想运用于遗传算法,提出了一种基于序次优化策略的改进遗传算法。
Methods The methods of retrospective survey and Probability Proportional sampling ( PPS) were used in the investigation of NT Mortality rate, the inoculation rate of tetanus toxoid ( TT) in the women of child-bearing age, antibody lavel; 方法用回顾性和PPS调查方法调查NT死亡率、育龄妇女TT接种率、抗体水平;
Based on the principle of the pollution probability, the atmospheric sampling station was set up on the coastal area of upstream wind side where the pollution probability is the highest. 应用污染几率原则,选择在沿岸地区最大污染几率的上风方位设立大气采样点。
Estimate of Mean with Its Character in Method of Unequal Probability in Group Sampling 集团抽样不等概方法的均值估计及其性质
The quantitative analysis of the input parameters can be done by probability random sampling deduction method for the leaking source of pipeline gas. The relationship between the uncertainties of leaking times of gas in the pipeline and the intensity of the leakage sources has been discussed. 采用随机抽样推断法对管道煤气泄漏源的输入参数的不确定性问题进行定量的分析,并且讨论了泄漏时间的不定性与确定泄漏源强度的关系,提出了管道气体泄漏时间估算方法。
Methods Households were stratified by the number of adults in the household and Kish Grid sampling method was used to perform equal probability sampling within each stratum. 方法采用KishGrid抽样方法,将抽样家庭按家庭成人数进行分层,在层内进行等概率抽样。
At first, the paper improves traditional algorithm of eliminating short twig by transcendental information, then ulteriorly eliminates the noises and high-frequency details that leave in the images by using projective algorithm, thus it reduces the probability of invalid sampling. 首先通过先验知识对传统的去短枝算法进行了改进,然后对仍然留在图像上的噪声点和高频细节用‘投影’算法进行了进一步的去除,这样就降低了无效采样的概率;
The result showed that the root-mean-square of Phase function fitted by random probability sampling method is smaller. 结果显示随机概率抽样方法拟合的相函数与散射相函数间的方均根差更小。
The representative of sampling is improved by using the method based on uniform probability sampling, which is used to calculate the size and form of tracking gate. 采用概率均匀采样的方法来提高状态分布模拟采样的代表性,并用于计算跟踪门的大小和形状。
Phase function of non-spherical particles is fitted by random probability sampling method, and it is compared with the Henyey-Greenstein ( H? G) empirical formula. 采用随机概率抽样方法拟合了非球形粒子的散射相函数,并与Henyey-Greenstein(H?G)经验公式的相函数拟合方法进行了比较。
The use of probability sampling was relatively small, particularly the use of simple random sampling is less than the quantity. 使用概率抽样的比例较少,尤其简单随机抽样运用的数量则更加少。
Monte Carlo method is employed to conduct the probability analysis and the Latin hypercube sampling method is used as well. 采用拉丁超立方抽样方法和蒙特卡罗模拟法进行概率分析。