抽样法

In this paper w e derived the optimum form of important function by variation method, with that proposed percepts to improve impor tant function; by utilizing the result of delaminateˉ sample theory, the improving direction of reˉsampling was determine d, and with that the double weight selecting partiˉ cle filtering was proposed.

为解决粒子滤波算法在实际应用中出现的滤波发散、粒子退化问题，文中利用变分法证明了重要性函数取法的最优形式，并由此提出重要性函数的改进方案；利用分层抽样原理，确定了重采样方法的改进方向，并由此提出双权重重采样方法。

NTC method is used to select collision molecules and diffuse reflection model is used for the collision between molecules and body surface. Some cases employ finitely catalyzed method to the disposal of wall boundary, and useful results are obtained.

分子碰撞对的抽样采用非时间计数器法，分子与物面的碰撞则采用了漫反射模型进行处理，部分算例加入了壁面有限催化处理，得到了有意义的结果。

Objective:This paper proposes an iterative noncentral procedure for the sample size determination in log rank test and compares it with the LachinFoulkes procedure. Methods: Samplings are performed with a prescribed size.

本研究首先按临床数据实际分析过程说明设计参数赋值依据和生存研究所需样本量测定原则，然后提出迭代非中心法，即借助重复抽样估计其非中心参数，测定所需样本量，并同基于指数分布的方法进行比较。

The purpose of this study was to investigate the sampling distribution of the stress values yielded by Kruskal's nonmetric multidimensional scaling procedure.

本研究旨在调查非计量多向度量尺法之适合度统计数──压力系数的实徵抽样分配。

In addressing the heterogeneity factor, this paper will use Logistic regression, the Beta-binomial model the Williams method arid GLMM to analyze the secondary data collected at the incidence of Downy mildew on grapes and Phomopsis leaf blight on strawberrys. Also, there will he a thorough discussion on the advantages and disadvantages among the different model approaches according to -2 Res Log Likelihood, AIC, BIC and residual plots.

本研究旨在探讨病害发生率的研究中，以层次取样法进行抽样，并以实际资料葡萄露菌病和草莓叶枯病的病害发生率为例，藉由计算离势参数、-2 Res Log Likelihood、AIC、BIC和绘制残差图，比较逻辑斯回归、贝他－二项模式、威廉斯模式与广义线性混合模式四种模式对资料进行配适情形，来探讨这些方法克服过度离势的能力并比较其优劣。

Factor analysis methodology was applied to the data matrix gathered from users' opinions on a restricted sample of social science DB thesauri.

我们应用因素分析法来分析社会科学数据库中严格抽样出来的用户观点数据矩阵。

Prior to conducting the study, a questionnaire was designed and developed based on analysis of literature and practical situation. The questionnaires were distributed to Buddhist nuns in different nunneries and monasteries to gather needed information. From the 119 returned questionnaires, only 100 were valid. They were analyzed by using SPSS for Windows.

本研究以文献分析和问卷调查法为主要的研究方法，采取非随机抽样的方法，自民国89年5月15日至89年7月31日止，以亲自拜访、委托他人、或邮寄问卷的方式，到台湾北中南著名道场、各佛教大学及佛学院所发放问卷，共寄发290份问卷，回收119份，其中无效问卷有19份，故实际的有效问卷为100份，最后以SPSS统计软件进行分析。

According to the limits from the standard which will be set - Limits and Measurement Methods for Smoke Emissions from Mopeds and Motorcycles, motorcycle samples were tested in our country, with the method of test for exhaust smoke under snap - acceleration conditions for motorcycles.

以即将制定的《摩托车和轻便摩托车排气可见污染物限值及测量方法》标准中的限值为依据，用急加速法对我国新生产摩托车和在用摩托车的排烟进行部分抽样检测，结果表明，四冲程摩托车的排烟通过率为100％。

The key technologies of Grid Method including grid divided in basin, impact radius of rainfall and number of reference rainfall stations have been discussed with example. The parameters of Grid Method have been selected through trial and error. Using simple random sampling to simulate the failure to collect rainfall, the relation between surface rainfall calculation error and station density, station distribution, uneven spatial distribution of rainfall has been sought.

论文探讨了流域网格剖分、降雨影响半径、搜索半径范围和参证站数量等关键技术，研究了网格法参数的优选，并采用简单随机抽样模拟降雨缺测情况，给出了面雨量计算误差与流域站网密度、均匀度、降雨分布不均匀性指标的关系。

The present paper reports the phenotype and gene frequencies of GLOI of 7 nationalities in Inner Mongolia province, including the nationalities of Han, Ewenki, Dawuor, Orogen, Buryat,Northeast and Northwest Mongolian, using mixed starch/agarose gel electrophoresis.

应用琼脂糖水解淀粉凝胶平板电泳法，对中国内蒙古呼盟鄂伦春、鄂温克、达斡尔、布里亚特、蒙古人及包头市蒙古族、汉族人血GLOI遗传多态性进行了调查，抽样检测7个群体GLOI表型分布频率，计算出基因频率和识别能力。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。