查询词典 clusters

Our AFM study shows that both the compact and ramified Ag clusters observed by the optical microscope are composed of smaller atomic clusters (～50 nm).

原子力显微镜表面分析结果显示：用光学显微镜所观察到的准圆形团簇和分枝状凝聚体的分枝均是由一颗颗更小（～50nm）的团簇组成的。

Cluster sampling: When the Basic sampling unit in the population is to be found in groups or clusters the sampling is sometimes carried out by selecting a sample of clusters and observing all the members of each selected cluster.

整群抽样：一种抽样方法。当母体中的基本抽样单位是按群、组分类时，有时抽样方式是选择一类样本群组，然后对被选择的群组中的每一个样本单位的全体成员进行观察。

Due to their applications in magnetic, optical, electronic and catalyst, polynuclear lanthanide clusters are of importance. In this part, a series of nanowheel-shaped nonanuclear lanthanide clusters,〓〓(Ln=Sm~Tm; BA=benzoylacetone), were prepared and characterized. Each complex can exist in three phases, i. e., cubic, tetragonal and triclinic.

本论文第二部分在醇溶液中以三乙胺调变溶液pH，利用β-二酮配位方式的灵活性成功地构筑了一系列结构稳定、纳米尺度轮状的九核稀土配合物〓〓（Ln=Sm~Tm；BA=苯甲酰丙酮），并在不同溶剂中重结晶分别得到了三斜、四方以及立方三种晶型的晶体。

Finally, the article brings forward policy suggestions on how to support and develop the local clusters of enterprises and strengthen the regional economy strength standing on the side of government, and countermeasure used to foster well environment of cluster development, build well unisonous competition mechanism, advance the competitive of the enterprises in the clusters.

最后，论文基于上述研究思路和结论，提出了政府扶持发展地方特色企业集群、增强地区经济实力的政策性建议；以及集群内企业与地方政府一道为培育良好的集群发展环境、建设良好的协调竞争机制、以提升集群内企业竞争力的对策。

For the metal-oxygen clusters containing tungsten, the pyrolysis procedure of potassium salt with [P2W18O62]6-anion is similar to that of metal-oxygen clusters with [P2Mo18O62]6-anion, whenas the NH4+, Cu2+salts of [P2W18O62]6-seem to decompose directly into WO3 at 400 ℃, 450 ℃,respectively.

以钨为配位原子的钾盐在410 ℃也有相似的行为，但铵盐和铜盐却没有观察到类似的热重排现象，分别在400 ℃， 450 ℃直接热分解为WO3。

Mineral deposit clusters;(4) establishment of the theoretical framework of continental accretionary theory and prediction for mineral deposit clusters and recognition of mineral deposits.

按照 &大陆动力学过程－壳幔相互作用－增生成矿理论－预测方法体系&的研究思路，以&岩石探针&和&矿床探针&为切入点，研究大陆动力学演化过程和壳幔作用成矿机理，实现成矿理论和预测方法体系的创新。

Production and size determination of large size atomic clusters A gas jet of clusters was produced when a high backing pressure rare gas adiabatically expanded into vacuum through a home-made double solenoid pulsed valve and a conic nozzle.

高背压惰性气体经由自行设计研制的双线圈高速脉冲气阀和锥型喷嘴向真空绝热超声膨胀，形成团簇喷流。

Directional dipolar interactions in the clusters lead to magnetic anisotropy, which makes it possible to align the clusters in a magnetic field (900 Oe).

纳米簇中的定向双极作用将导致磁各向异性的形成，因此有可能实现纳米簇在磁场中的直线排列。

Finally, based on the perspective of social capital, it is necessary to take some measures to utilize the positive contributions and restrain the negative contribution which the social capital brings to technical innovation in the industrial clusters, such as to actively build up the regional innovation environment in industrial clusters, and to equilibrize between the local and globalization.

最后，本文基于社会资本的视角，提出要积极营造集群区域的创新环境、使产业集群在充分立足于本地创新网络系统的基础上，也要加强与集群外的全球化联系，从而达到发挥社会资本对技术创新的正面效应与抑制其负面效应的目的。

In this paper,a novel clustering algorithm DBSB (Density Based Spatial Clustering Method with Heuristically Selecting Border Object) is proposed.The algorithm fastly expands the clusters by a heuristical function to choose core objects in the border region of the known core object,and then merge some clusters by border objects.

本文提出了一种启发式选择边界对象的快速空间聚类算法DBSB，通过一个启发式函数近似选择相对于某个已知核心对象边界区域中的核心对象和边界对象，通过核心对象的序列来快速地扩展它们所在的簇，直至找到一些较小的簇。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。