查询词典 sampling methods

Methods To analyze retrospectively the ultrasonography of 8 cases which had been karyotyped to be trisomy 18 by fetal blood sampling or amniocentesis.

对脐血或羊水染色体核型分析确诊为18三体综合征的8例胎儿超声声像图进行回顾性分析。

Methods Through two phase cluster sampling, 566 pupils in grade 4 and grade 5 of two schools were assigned to intervention group and control group.

方法采用两阶段整群抽样的方法，选取两所小学的所有四、五年级学生566人为研究对象。

Methods A two stage cluster sampling method was adopted to determine the number of entertainment places and CSW. The blood samples testing HIV and syphilis were collected.

采用两阶段整群抽样法确定抽样调查场所和调查人数，并采集血标本检测HIV、梅毒。

Simulated data had be used to check these methods. Calculation results were quite satisfactory, in which exponential sampling, CONTIN and NNLS was suitable for unimodal and bimodal distribution. Based on the theoretical study, a PCS ultrafine particle size measurement apparatus was set up.

在以上理论分析的基础上，应用PCS理论研制了一台超细颗粒粒径测量装置，该装置在国内无关键专用设备----数字相关仪的情况下，采用软件辅以外围硬件设备替代数字相关仪，实践证明是有效的。

Objective: to compare the relative safety of two methods of chorionic villus sampling.

目的：比较两种术式绒毛取材的相对安全性。

Methods By use of random sampling, 200 5yearold and 200 12yearold children from nonferrous metal industrial areas and the same number children from nonindustrial areas were examined, which included conditions of dental caries, oral hygiene and dental fluorosis in 12 yearold children. Meanwhile, fluoride concentration in drinking water was measured. Results For the 5 yearold children, the prevalence and DMF index had no statistical difference between the industrial areas and nonindustrial areas.

选择有色金属基地儿童作为研究对象，以临近非工业区作为对照区，采用随机抽样的方法分别抽取有色金属工业区与非工业区5岁和12岁儿童各200名，共800名，调查儿童龋病患病状况、口腔卫生状况和12岁儿童氟牙症状况，并测定当地饮水氟质量浓度。

Methods 27 species of Acaroid mites were isolated from 19 grain species in 3 groups of grain stocks with the stratified sampling; Two fuzzy matrixes was founded for classification.

方法从 19种粮食中分离出的粉螨经软划分法建立模糊相似矩阵后，采用直接编网分类和带权重αi 编网分类。

Methods: A cluster randomized sampling method was used to collect the samples from the storages in the houses of city inhabitants and the acaroid mites were identified and counted under the microscope.

采用整体随机抽样调查方法，采集淮南地区房舍储藏物标本，镜下进行粉螨分离鉴定，并结合哮喘的流行病学调查表统计数据，进行相关性分析。

Methods Different kinds of air conditioners in different de-partments of the two restaurants were selected using the sampling method to detect the total number of bacteria,fungus,hemolytic Streptococcus,legionella spp,staphylococcus aurous and bacillus sporus on the filters,the cool water of the air conditioning system,and also of the air dusk.

采用对酒店各部不同类型空调进行抽样调查，检测空调系统过滤网、冷却水、空气中的细菌总数、霉菌总数以及军团菌、溶血性链球菌、金黄色葡萄球菌、芽孢杆菌等项目。

Methods: form january 1995 to january 2005, 42 patients with acute respiratory failure (acute respiratory failure group) and 84 random sampling after esophagectomy and cardiectomy were studied. age, sex, smoke index, preoperative respiratory function, preoperative pulmonary and the other complications, hypoproteinemia, the site of anastomosis, duration of operation, postoperative analgesia, postoperative other complications were compared by logistic regression analysis.

将1995年1月～2005年1月期间食管癌、贲门癌术后发生arf的42例患者临床资料，与按1∶2比例随机抽取的同期手术后未发生arf的84例食管癌、贲门癌患者的资料做对照，应用logistic回归分析比较两组患者的年龄、性别、吸烟指数、术前肺功能、术前有无肺部合并症和其它合并症、术前有无低蛋白血症、吻合口位置、手术时间、术后是否镇痛、术后有无其它并发症等与术后发生arf的相关强度，推测可能导致术后arf发生的危险因素。

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。