数集

In this dissertation some researches on distancs of interval-valued fuzzy sets and metric space with respect to the distance are made.

本文主要讨论了区间值模糊集之间的几种距离并研究了相应的区间值模糊数距离空间的性质。

The article applies the multivector algebra which is isomorphism with the real Dirac algebra in the real space-time adopted by Venzo de Sabbata to the contact number of set pair analysis, and consequently, t...

试图将VenzodeSabbata教授所采用的与Dirac代数同构的实时空中的多重向量代数应用于集对分析中的联系数，从而相应地推广了联系数的范畴。

Real space-time ; multivector ; algebra ; set pair analysis ; contact number ; spinor ; manifold

实空间；多重向量；代数；集对分析；联系数；旋量；流形

Basing on the future of fractal,this paper introduces the density analysis method and points out the defects of existing feature selection method based on fractal dimension.Then a feature selection method based on fractal and changes of neighborhood space density is proposed.

根据数据集的分形特征，引入了密度分析方法，指出了当前基于分形维数的属性选择方法的不足，提出了一种基于分形和邻接空间密度变化的属性选择方法。

The static theoretical indexs(the Mulliken bond population, the gap of the front line orbit energy and the net charge of the nitro group) and kinetic theoretical indexs illustrate pyrolysis mechanism and are correlated with experimental impact sensitivity.

以静态指标(键集居数、前线轨道能级差和硝基上净电荷)和动态理论指标阐明了热解引发机理，关联了实验撞击感度。

The structural parameters of PNHAAs, such as the the maximum N-NO2 bond length, the least N-N Mulliken population, the least negative charge on the nitro group (QNO2) and OB100, were studied to predict their relative stability or sensitivity (the easiness for initiating a detonation, high sensitivity means low stability).

通过研究PNHAAs的结构参数，如N-NO2最大键长、N-NO2键的最小Mulliken集居数、-NO2所带最小负电荷、氧平衡，预测了10个标题物的相对稳定性或感度(起爆的难易程度。感度越高，化合物的稳定性越低)。

Selection criterion is based on the Frobenius-2 norm of received signal vector at each receiving antenna.

仿真结果表明，在高信噪比条件下，选择有最大范数的接收天线子集，系统能实现和使用全部接收天线的U码传输系统渐近相同的分集增益。

The pair-wise error probability analysis and simulation results show that,under the condition of high SNR,by selecting the set of antennas that observe the largest instantaneous Frobenius-2 norm of received signal vector,the same diversity gain can be achieved as the one obtained by using all the receive antennas.

成对错误概率分析和仿真结果表明：在高信噪比情况下，选择有最大范数的接收天线，系统能实现和使用全部接收天线相同的分集增益。

The number of partitions/clusters may or may not be known a priori.

分区数/可能或可能不知道一个先验集群。

Up to forty years ago, this date was virtually unknown amongst collectors in the Colony but since that time, and with increasing interest now being shown in numismatics by more and more people, a few tenths specimens have come to light.

四十年前，本港的集币家还未发现这一年的硬币，但从那时起，对钱币学有兴趣的人越来越多，数十枚这种硬币的样本也随之被发现。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。