抽样

Methods A total of 986 recruits finished a self administered questionnaire,Egma Minnen av Bardndosnauppforstran, Adolescent Self Rating Life Events Check List and EPQ. Everyone who had suicidal attempt was interviewed.

采用多级整群抽样法随机抽取某部986名新兵，采用自编调查问卷、父母教养方式问卷、青少年生活事件量表和艾森克个性问卷进行调查。

Via examining, have 40 kinds eligibly , sampling percent of pass is 58.8%, among them 10 kinds belong to the product with quality serious problem.

经检验，合格的有40种，抽样合格率为58.8%，其中有10种属于质量问题严重的产品。

With good extendibility, this software can be extended by adding new distribution patterns.

该软件可用于生物的抽样、保护、模拟等研究，以及分布型展示等。

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。

Results a total of7924people from15survey sites of6counties were under fecal examination,the overall infection rate of intestinal helminthes was59.40%.of the discovered16parasite species,11were nematodes,2taeniae and3trematodes.the infection rate of hook worm,trichuris and ascaris were33.18%、31.35%and14.29%,respectively.the mixed infection was serious.the infection rate were higher in age groups of5～9years and10～14years;nationality-based analysis showed infection rates in hans,lis,miaos and huis being48.27%,64.14%,76.36%,and58.96%,respectively;the infection rate in female was higher than that in male.

结果 整群随机抽样全省5个市、县15个点7924人，调查发现人群肠道蠕虫感染率为59.40%，其中土源性线虫感染率为56.22%，查见肠道蠕虫16种，其中线虫11种，绦虫2种，吸虫3种，感染率较高的虫种是钩虫、鞭虫和蛔虫，其感染率分别为33.18%、31.35%和14.29%；多虫感染较严重，感染度以轻度感染为主，感染年龄以5～9岁和10～14岁两组为高；汉、黎、苗、回各民族感染率分率别为48.27%、64.14%、76.36%、58.96%；女性和农村居民感染率明显高于男性和城镇居民。

Methods A randomized cluster sampling was performed to obtain a representative sample of population in Xinjiang Hefeng pastoral area.Blood wag taken from 632 individuals aged 30 and older for measurements of total cholesterol,triglyceride,hish density lipoprotein cholesterolby automatic biochemieal analyzer.The serum levels of low density lipoprotein cholesterolwas calculated according to the formula.

采用整群随机抽样的方法选取新疆和丰县牧区年龄≥30岁的牧民632人为调查对象，其中哈萨克族325人，蒙古族307人；抽取空腹12 h静脉m 3ml，采用日立7600全自动生化分析仪测定血浆总胆固醇、甘油三酯、高密度脂蛋白胆固醇的浓度，并根据公式计算出LDL-C的浓度，对资料进行汇总，并采用t检验、方差分析或协方差分析的方法观察两民族间血浆LDL-C水平的差异，并进一步采用多元逐步同归分析的统计方法研究其影响因素。

Methods: The sample of 703 aircraft-made workers (522 riveters, 181 test pilots) was chosen randomly and field hygeian survey in aircraft-made site were carried out, as well as hearing test was done at the same time.

用整群抽样的方法在某飞机厂抽取703名飞机制造工人（其中铆工工人522名和试飞工人181名），进行现场卫生学调查和听力测试。

METHODS: A sample group of 416 adults aged from 15 to 75 years old was randomly enrolled in this study. The Smith and Knight tooth wear index was applied to assess the degree of the incisal and occlusion surface wear of total 11 395 teeth from the group.

分年龄段对抽样人群进行牙齿随机检查，采用Smith 和Knight牙齿磨耗指数TWI分度方法，对416 例受检人群的11 395颗牙齿的切缘和咬牙合面进行磨耗度检查。

2Chlorine residual of indirected system are decreasing are sampling efficiency of stratification and stage are good.

2有效余氯量经水池、水塔后数值会降低，且分层分段抽样效率皆良好。

On the Whole, the conclusion of research are (1)average estimation of total dissovled solids are almost equal in three supply systems and sampling efficiency of stratification divided into directed and indirected system are good.

研究结果显示：(1)就水质中的总溶解固体量平均估计值在三种供水型态，大约相同；且分为直接、间接两层，其抽样效率良好。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。