查询词典 cluster sampling

Applying mathematical statistics, this paper studied the characters of random sampling and its excessive random effect on other trip characters, put forward stratified sampling method, researched quota sampling and best distribution sampling.

建议对于大型城市采用简单随机抽样方法；而对于中小城市，按年龄分类，采用分层抽样方法，以提高调查精度。

The main work of this paper is to study the sampling theorem in domain of the fraction and the sampling relationship. We will try to obtain the theoretic sampling rate and the proof of feasibility. And we also give some relationship between the kernels under the meaning of sampling.

本文的主要工作就是，研究了分数傅立叶变换算子核函数的采样定理及采样关系，给出了一种能够达到理论的最佳采样频率的尝试，也给出了这种做法的可行性的证明，更进一步由采样关系给出了核函数的一些关系。

At present,the methods of random sampling,systematic sampling and stratified sampling are widely used in remote sensing sampling.

目前，随机抽样、系统抽样和分层抽样方式在遥感抽样调查技术领域应用比较广泛。

After analyzed the form mechanism of Industry Cluster by analyze the form condition and dynamical mechanism of Industry Cluster, this paper put forward the actuality and existed problems of Industry Cluster in Shaanxi.

在从产业集群的产生条件和动力机制两方面分析了产业集群的形成机理之后，文章详细分析了陕西产业集群的发展现状和存在问题。

This invention relates to a structuring method for a multi-allotter front end system of a cluster server characterizing in including the following steps: setting up more than two front end allotters matched with two net cards, a cluster server front end system of a collecting tray, the data input end net cards of the front allotter are cascade via the collecting tray, the data output end net cards of all front allotters are connected with the switching device of the cluster server back end system, the data input end net cards are matched with a same virtual IP, all input data packets are transmitted to all front end distributes in broadcast way, every front server computes, the input data packet IP addresses or TCP port number in hash to decide if said data packet is processed.

本发明涉及网络服务器技术领域，尤其是一种集群服务器的多分配器前端系统构成方法，其特征在于：包括以下步骤，建立包括两台及以上的配置了两块网卡的前端分配器、一台集线器的集群服务器前端系统，所有前端分配器的数据输入端网卡通过集线器并行集联，所有前端分配器的数据输出端网卡与集群服务器后端系统的交换机相连；所有前端分配器的数据输入端网卡配置一个相同的虚拟IP；通过集线器将输入数据包以广播方式传输到所有前端分配器；各前端分配器对输入数据包IP地址或TCP端口号进行散列计算，决定是否处理该数据包。

According to the study of former researcher, the paper puts forward basic hypothesis of building cluster brands, and constructs the model of transformation for the mode of cluster brand. The paper takes Datang socks cluster for example, and tests the model with t-test and binomial distribution test.

本文根据国内外学者的相关研究，提出建设集群品牌的基本假说，据此构建了集群品牌发展模式转换模型，并以浙江大唐袜业集群的品牌发展为实证，运用t检验和二项分布检验对该模型及假说进行了检验。

It was found that the competition between cluster-cluster and cluster-surface interaction strongly affects the chemisorption configuration, and thus the film morphology.

发现团簇-团簇相互作用与团簇-表面相互作用的竞争显著地影响团簇在表面上的化学吸附组态，从而影响薄膜的结构。

The high degree of competitive and cooperative atmosphere inside the industry cluster makes the enterprises devide the production process much more professionally and subtly, which make it possible that less cost and more frequency of technical innovation can be attained. Owning to the distinct industrial , regional and network characteristics of the industry cluster, the industry international competitiveness can be greatly improved along with the implementation of industrial cluster strategy for those industries which have the characteristics of long production chain and obvious circumbendibus production mode.

产业集群区域内部高度的竞合氛围，使分工更专业、更精细，使成本降得更低、技术创新节奏更快；由于产业集群具有明显的产业特性、地域特性与网络特性，对于那些产业链比较长或迂回生产方式比较突出的产业，利用集群化发展可以迅速提升该产业的区域、国内或国际的竞争优势。

This thesis does a study of the following points: Firstly, the theories in theindustry cluster and the way to industry cluster were set forth, and then a study wasmade into the problems and countermeasures of improvement in the industry cluster.

本文的主要工作如下：首先，阐述产业集群理论和产业集聚的实现路径，并对推进产业集聚面临的问题与对策进行了探讨。

Several cluster validity measures have been proposed for confirming the optimal k value. However, the existing methods may not work well for the following two kinds of data sets: the data set containing cluster groups with different densities and the data set in which the cluster groups are extremely close to each other.

目前，已经提出了许多确定最佳k值的聚类有效性方法，但这些方法都不能很好地处理两种数据集：类密度不同的数据集和类间距比较小的数据集。

Objective:To compare the response control and attention of Schizophrenic patients with that of the healthy controls by Integrated Visual and Auditorycontinuous performance test. To quantitate the impairment of cognitive function in patients, and to explore the relationship between cognitive function and the severity of the disorder.

目的：探讨精神分裂症病人在IVA持续操作测试中的反应控制能力、注意力等，并与健康人进行比较，从而量化精神分裂症病人的认知功能损害，并进一步探讨其认知功能与疾病严重程度的关系。

Main effective factors including subcooling degree, mechanical vibration, gas hydrate reformation, environment temperature, noncondensing gas and surfactant are analyzed.

指出过冷度、机械振动、重复生成水合物、环境温度、不凝性气体、添加剂是影响气体水合物生成的主要因素，还对R152a水合物的放冷进行了实验研究。