查询词典 sampling methods

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。

Methods Fourteen healthy pigs were anesthetized and intubated, the right carotic artery was cannulated for blood pressure monitoring and blood biochemical sampling.

术中输入不含糖的平衡盐液，供肝用Collin's液灌注。在无肝期采用体外静脉转流，经左侧股静脉和门静脉插管，引流出的血流经体外转流系统输入左侧腋静脉。

Methods: Design: Crosssectional questionnaire survey. Measures: Demographic data, CDC (1994) CFS diagnostic criteria, Trudie Chalder fatigue scale, and China national standard for TCM syndrome types criteria. Subjects: Twenty to fifty years old adults by convenient sampling.

按流行病学方法，参照英国Chalder等制订的疲劳量表、美国疾病控制中心1994年制定的CFS诊断标准及按《中药新药临床研究指导原则》中医证候指导原则的要求制定调查表，对香港地区20～50岁的普通公民进行非随机抽样调查。

objective to set up mode of management,prevention and cure on epilepsy among rural population in ningxia by primary medical care system,then extend toward others rural regions.methods doctors in county,countryside and villege level were trained how to screen,diagnose,prevention and treat epilepsy among 140 countrysides and 3,786 thousand rural populations in ningxia.cluster sampling was adopted to screen convulsibility epileptics,to freely treat with pb.

目的 建立宁夏农村地区癫痫的防治和管理有效模式，并逐步向其它农村地区推广。方法采取整群抽样方法，选择宁夏农村地区140个乡，共计378.6万人群。通过对县、乡、村医生的专业培训，筛选惊厥性癫痫患者，采用苯巴比妥单药免费治疗，分别在第3、6、9和12个月对其疗效进行评估。结果培训了172名县、乡、村医生。

Methods Through questionnaires,the annual number of X-ray diagnostic examination of the whole province was investigated,according to it,hospitals were arranged decreasingly into four levels,and proceeded the stratified random sampling on the rations of

阳性率是判断X射线诊断检查应用是否符合合理应用原则的重要指标之一。X射线诊断检查的阳性率应保持在一个合理的水平上，如果阳性率过低，表明无临床意义的X射线诊断检查的应用过多，应当采取措施予以限制。

Method］ In the light of the sampling method in Environmental Testing and Analysis Methods issued by SEPA, the atmospheric environment, water and soil environmental quality were tested for GAP base of Desmodium styracifolium Merr..

方法］参照国家环保局《环境检测分析方法》布点采样，对广金钱草规范化种植基地的大气环境、土壤环境和水源质量进行检测。

Pachomius manual labour was organized as an essential part of the monastic life; and since it is a principle of the monks as distinguished from the mendicants, that the body shall be self-supporting, external work of one sort or another has been an inevitable part of the life ever since.

根据圣pachomius体力劳动组织作为一个重要组成部分寺院生活；以来，这是一个原则的和尚，作为有别于乞丐，该机构应自支撑，对外工作的这种或那种已一个必然的一部分，生活至今。

In order to study the effects of parametrical rolling on the ship movement and tilts, in allusion to ship's navigating in regular following waves, the equation of ship rolling motion is transformed into normal Mathieu equation by proper variable replacement when strong parametrical excitation in restoring moment varied according to sine or cosine wave.

为研究参数横摇对船舶运动和倾覆的影响，通过对船在规则波上随浪航行时，恢复力矩中出现的1个以正余弦规律变化的强参数激励项进行适当的变量置换，将船舶的横摇运动方程转换成标准形式的Mathieu方程。