查询词典 clustering

Among the one-level clustering algorithms for data stream, the one of most famous algorithms is STREAM which was designed by Sudipto Guha et al, the members of Stream Group in Stanford University.

但是聚类是一个应用性很强的问题，我们应该将我们的视角转向实用角度。

In the research, one kind of guzmania species named ostara was employed to be as material, and the full-length cDNA plasmid library of floral organ was constructed successfully by using SMART technology. The library had 3×10^6 original titer and more than 1 kb insert fragments. After 5'EST sequencing from 2004 positive clone chosen at random and clustering analyse, 1 758 high-quality sequences and 1 365 unigenes including 175 contigs and 1 195 singlets were obtained. These unigenes had 1 283 valid ORFs. COG analysis showed that those proteins coded by EST sequences were divided into 22 classes. Through blast analysis, full length or part cDNA of some genes controlling flower color, development of floral organs, florescence regulation and other breeding value genes were obtained.

本研究以擎天凤梨属品种Ostara为材料，采用SMART技术成功构建了擎天凤梨花器官的质粒型全长cDNA文库，初始文库滴度为3×10^6，插入片段平均长度大于1kb；随机挑取2004个阳性克隆进行5'EST测序，获得高质量序列1758条，经拼接获得1365条单基因簇，其中跨叠群175个和单条序列1195个；经ORF寻找共获得有效ORF1283条；经COG分析EST序列编码的蛋白质被分为22类；经Blast分析后，获得一批花色、花器官发育、花期调控以及其它育种价值基因（包括cDNA全长或片段）。

Extracted from the images of 28 species of insects of the Hemiptera, Lepidoptera and Coleoptera, the application of rough-set theory and fuzzy clustering analysis in insect taxonomy was evaluated.

本文根据昆虫图像，对半翅目、鳞翅目、鞘翅目的28种昆虫提取的形状参数、叶状性、球状性等7项数学形态特征进行了粗糙集模糊聚类分析。

Clustering was based on SSR markers. Six maize populations were divided into 4 heterotic groups.

根据SSR标记的遗传距离，将供试的6个玉米群体划分成为4大优势类群。

Clustering results showed that the clusters were not corresponding to heterotic groups and pedigrees,which suggested that the A-PAGE of seed storage proteins might not be a good method for large-scale analysis of genetic diversity and heterotic grouping in maize germplasm.

利用盐溶蛋白多态性完成的聚类分析结果和自交系系谱及杂种优势群之间没有明显的对应关系，表明储藏蛋白A-PAGE方法对于大规模玉米种质资源的遗传多样性分析和类群划分可能存在局限性。

The clustering analysis classified the 24 cultivars into 2 groups and 5 subgroups, which respectively corresponded to indica-japonica differentiation and known rice heterotic groups based on pedigree information and blast reaction.

聚类分析将供试品种划分为籼粳差异明显的2个类群和分群结果与其系谱关系及抗性基本吻合的5个亚群，表明候选抗病基因标记可用于水稻品种的遗传关系、水稻病害控制和抗病育种方面研究。

Among these three methods, principal component analysis is not necessary; a large amount of severe problems (such as the determination of the number of clusters) encountered in the delineation of hydrologically homogeneous regions arise in conventional clustering methods and the employ of discrimination analysis is not intuitional.

在这三种统计技术中，主成分分析并非划分水文均一区必要的步骤；大部份关於水文均一区的划分的问题则存在於传统的群集分析方法中；而识别分析在水文均一区划分中的用法则并不直觉。

This method uses what Professor Salton has proposed as the vector spacial model to express text as an invisible vector in hyperspherical space.It makes use of certain pre-disposal methods (reduce the dimensions,clustering thesaurus,filtering out old-fashioned words) to reduce the dimensions.It usescosines to measure the degree of similaritybetween texts and uses the total similarity as the target convergence vector.It produces clustered results by using restricted iteratives to achieve partial perfection.

该算法用Salton教授提出的向量空间模型把文本表示成不可视的超球向量空间的一个向量，采用一定的预处理手段(降维、同义词归并、停用词过滤)完成维数约减，使用余弦相似度度量文本之间的相似度，并选择总凝聚度作为目标收敛函数，通过有限次的迭代达到局部最优，输出聚类结果。

This paper will discuss in the first part how the data of borehole distances being transmitted from an ichnographic layout to the section planes employing a computer program, and a method of merging analogy soil sub-layers to a major layer with the same statistical properties to facilitate the mechanical analysis using the fuzzy clustering is introduced.

讨论了用程序编制的方法实现的数据从平面图到剖面图的钻孔距离传递，利用模糊聚类思想提出的对剖面数据进行合并的建议和利用地质三维软件实现的三维地质体模型的耦合展示，这几个问题正是目前大多勘察单位在数据控制与传递流程中可能欠缺的环节。

Theoretically, its calculation complexity is studied, while it is tested empirically by learning multi-samples generated randomly. The comparative analysis and applications show it has some merits of rapid searching and good clustering effect. B3. An immune network optimization algorithm with information feedback, which can solve special complex function optimization problems with high dimensions which objective functions are formed by summing multi-subobjective ones, is constructed based on the clone selection principle and the immune network regulation of the idiotype immune network.

为了对免疫系统中抗体如何学习抗原特征的整体行为有一定的认识，从单个抗体识别抗原及多个抗体并行识别抗原的特征出发，利用免疫应答的相关原理及免疫细胞的免疫功能设计了适合于批量样本聚类的抗原特征学习算法，理论上分析了其计算复杂度，获得了此算法中的关键参数与其搜索性能的关系；应用上，该算法通过对实际的多样本学习，获得了搜索速度快及聚类效果好的优点，比较分析表明这种方法是可行的和有效的。

Metrorrhagia is also gynaecological problems of common diseases.

崩漏是妇科常见病也是疑难症。

WordFTP gives you the convenience and timesaving you need.

wordftp让您的方便和省时您所需要的。