性质

In addition, access control policies of aggregated resources can be formulated as expressions of the algebra. Several algebraic properties of policy expressions are discussed. It shows that the algebraic properties of policy expressions can be used to verify whether policy composition results meet the protection needs of each party.

用代数表达式形式化地描述聚合资源的访问控制策略，讨论了策略表达式的若干代数性质，说明可借助策略表达式的代数性质去验证策略合成结果是否符合各方对聚合资源的保护性需求。

Determinants and their properties are also introduced. After review of the algebraic structure of the Euclidean space, the algebraic vector space then will be studied.

再复习欧几里德空间的一些代数性质与几何，然后学习向量空间与向量空间的性质。

We give several sufficient conditions of NA and NSD properties of random variables, compare the closeness of distribution functions of order statistics between NA and independent rv's, investigate properties of NSD defined by supermodular functions, study the dependence structure of stationary Markov process and order statistics and their spacings from two samples, establish stochastic comparisons of order statistics of heterogeneous rv's in the hazard rate and the reversed hazard rate orders, and give the first analytic proof of the closure property of the up shifted likelihood ratio order under convolution.

给出判定一组随机变量NA性质的几个充分条件，并给出NA和独立随机变量的次序统计量之间"贴近性"的比较，系统地研究基于特殊函数类所定义的NSD负相依概念，给出一些判别NSD性质的结构定理和一些有用概率不等式。系统研究平稳马氏过程的相依结构。研究两样本次序统计量及其问题隔的相依结构。在失效率、反向失效率序和似然序意义下给出非齐次随机变量次序统计量的比较。给出上漂移似然序卷积封闭性的第一个解析证明。

Because of different twist angle between the arene and aryl-bipyridine, Ppbpy displayed intermixing behaviors of local excited state (1La and 1Lb) and intramolecular charge transfer, but Apbpy only showed the properties of local excited state 1La.

由于芘和蒽与6－苯基-2， 2'-联吡啶间的夹角不同，Ppbpy的激发态具有原位激发态(1La and 1Lb)和分子内电荷转移的性质，而Apbpy的激发态仅仅表现出原位激发态1La 的性质。

The study results further indicate that it is feasible that studying the mechanisms of antiknock by making use of the electrochemical properties, which has guiding purpose in seeking new antiknock.

这一实际应用情况与各苯胺类化合物所表现出的电化学性质是相符的，表明利用电化学性质探讨抗爆机理是可行的，也对抗爆剂的寻求具有指导意义。

Methods The physicochemical parameters of PEG-PHDCA niosomes were characterized in terms of particle size, zeta potential, surface PEG density and fixed aqueous layer thickness.

方法对纳米囊泡的理化性质包括粒径、zeta电位、表面固有水化层厚度、PEG表面密度等进行表征，进一步阐明其理化性质与纳米囊泡的补体消耗和巨噬细胞吞噬之间的关系。

Argillaceous rheological property and penetrability of clay have been decided by zeta-potential ,which is conducted by the mobile surface of clay particle and electroneutrality media of solution.

运动中的黏土颗粒表面与溶液电中性介质形成的电动电位决定了黏土的流变学性质和渗透性质。

Results The mean value properties of this new arithmetic function and its convolution properties were obtained.

结果 得到了一个新的数论函数的均值性质及其他对合式的均值性质。

In this dissertation, we studied the mean value and hybrid mean value properties of some arithmetic function, and got some asymptotic formulas about them.

本文主要研究了一些数论函数的均值性质和混合均值的性质，得到了一些渐近公式。

The definition and properties of line segment arithmetic are given,which is a special situation of point set arithmetic,but easily calculated.

文章给出了线段算术的定义和性质，它是点集算术的特殊情况，但更便于计算；提出了线段Bézier曲线的概念，就是把区间Bézier曲线中的长方形换成满足一定条件的线段，这里的线段是指该线段上所有点的集合；给出了线段Bézier曲线的性质及其细分算法。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了