查询词典 cluster sampling

The analysis of molecular variance revealed that 93.85% of the variance component was attributable to the variation among individuals within ditches. Low levels of the genetic differentiation coefficient among ditches, G=0.172 and Nm=2.4, indicated that the ditches barely hinder gene flow between Scaevola populations. UPGMA cluster analysis and principal coordinate analysis revealed no major groupings among ditches or among plants.

经过分子变方分析显示海南草海桐有93.85％的变方成分存在於个体间；POPGENE分析结果显示其遗传分化系数G(下标 ST为0.172，而基因流为2.4，显示沟渠并无阻碍基因交流之能力；UPGMA归群分析及主座标分析结果显示海南草海桐个体间几乎无差别或差异很小。

Mine safety factor on the composition and gray cluster analysis, based on the statutory right of Coal Mine Safety AHP gray evaluation model, and using the model of a coal mine in Shaanxi Tongchuan conducted a comprehensive evaluation.

通过对煤矿安全要素的构成及灰色聚类分析，建立基于AHP法定权的煤矿安全灰色评价模型，并运用该模型对陕西铜川某煤矿进行了综合评价。

Beichen District have a good basis for economic development and investment environment to attract a group of 500 companies at home and abroad, the introduction of a number of large compound, the construction of a number of influential good projects, I believe that these two central enterprises Michael set up a high level science and technology park project, Beichen District will promote faster economic development of the city's new energy industry cluster development, advanced manufacturing industry will play an important role in promoting.

北辰区有很好的经济发展基础和项目投资环境，吸引了一批国内外500强企业，引进了一批大院大所，建设了一批具有影响力的好项目，相信中央企业这两个高水平项目落户北辰科技园区，将促进北辰区经济更快发展，对本市新能源产业集群发展，先进制造业的发展将起到重要的推动作用。

The cluster analysis showed that subjects could be grouped into three clusters by cognitive/conation components.

3认知╱意动成份四个因素可以将全体受试者区分成三个特性明显的集群。

The optimization methods of database SQL query were studied and some available query optimization Methods were given out as follows: The incompatible data type should avoid to be used; More redundancy search parameters should be given as join condition in join query; In some condition, the number of note hitted to target was estimated by optimizing implement using the average density; Some other maths operating symbol should avoid to be used as condition parameters in WHERE clause; Some operating symbol and its sentence should avoid to be used also; When the cluster function was used,the WHERE clause should be paied attention to more,and so on.

作者单位：（重庆工学院商贸信息学院，重庆 400050）摘要：数据库SQL查询语句的优化，须注意：避免使用不兼容数据类型；连接查询中应多给连接条件提供一些冗余的搜索参数；某种条件下优化器只能使用其平均密度以估计命中的记录数；避免对WHERE子句中条件参数使用其它数学操作符；避免使用某些操作符及相应语句；聚簇函数的使用应注意WHERE子句。

Methods for feature space discretization based cluster algorithm and class conditional probability distribution estimation are proposed.

首先针对应用贝叶斯决策理论时难以估计类条件概率密度函数的问题，提出了特征空间离散化及相应的类条件概率分布的估计方法。

Cluster is a relative steady microcosmic or sub-microcosmic congeries which is composed of several or even thousands of atoms or molecules through chemical or physical combining force .

团簇是由几个乃至数千个原子或分子通过一定的化学或物理结合力组成的相对稳定的微观或亚微观聚集体。

Cluster is a system which is connected with a group of node computers via high performance network or local area network and provides high performance, high availability and high scalability.

机群就是通过高性能网络或局部网络将一组计算机系统互联，形成的具有单一系统映像的高性能、高可用性、高扩展性的计算机集群系统。

A Cluster System is a group of computers connected with fast exchanging networks that can provide high performance services continuously under the assistance of certain software.

服务器集群系统是将一组计算机通过快速交换网络连接起来，配以适当的软件，来持续地提供高性能的计算服务。

Cluster system, a system that is connected with a group of node computers via high performance network, provides high performance, high availability services to its users as a single system.

机群系统是指将一组节点计算机通过高性能互连网络连接起来，并作为一个单一系统向其用户提供高性能、高可用服务的系统。

We were cousins—his grandfather was King of Scots,and his great-grandfather was Henry VII of England.

我们是堂姐弟——他的祖父曾是苏格兰国王，他的曾祖父是英格兰的亨利二世。

I do want to help you, but I am in a quandary now!

我是想帮你，但是我现在左右为难啊！