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22.
Jean-Sébastien Coron 《Designs, Codes and Cryptography》2009,50(1):115-133
The first practical identity based encryption (IBE) scheme was published by Boneh and Franklin at Crypto 2001, based on the
elliptic curve pairing. Since that time, many other IBE schemes have been published. In this paper, we describe a variant
of Boneh-Franklin with a tight reduction in the random oracle model. Our new scheme is quite efficient compared to existing
schemes; moreover, upgrading from Boneh-Franklin to our new scheme is straightforward.
相似文献
23.
采用紧束缚近似计算方法,研究了金属有机骨架(MOF-5)和不同官能团(―NO2,―NH2,―CH3,―OZn)修饰后的MOF-5不同吸附位点的CO2等温室气体和部分工业废气吸附性能以及对不同气体的选择性吸附能力.结果表明,对于未修饰的MOF-5,位点I和II是主要的吸附位点,最大吸附能可达-0.25eV.官能团修饰提高了MOF-5对CO2的吸附能力,其与官能团活性和局部位型密切相关.其中―NO2修饰使各位点的CO2吸附能力都有一定提高.同时,―NO2修饰后MOF-5对空气环境(O2,N2,H2O,CO2),工业废气环境(CO2,CO,NO,NO2,SO2,SO3)中不同气体有明显的选择性吸附能力. 相似文献
24.
Karen E. Smith 《Proceedings of the American Mathematical Society》2001,129(3):667-669
It is proved that tight closure commutes with localization in any domain which has a module finite extension in which tight closure is known to commute with localization. It follows that tight closure commutes with localization in binomial rings, in particular in semigroup or toric rings.
25.
整体晶体基(又称为典范基)在量子群及其表示理论中起着重要的作用. 紧单项式是典范基中最简单的元素.本文基于Lusztig的工作来确定A_4型量子群中紧单项式的区域. 相似文献
26.
We consider the problem of realizing tight contact structures on closed orientable three-manifolds. By applying the theorems of Hofer et al., one may deduce tightness from dynamical properties of (Reeb) flows transverse to the contact structure. We detail how two classical constructions, Dehn surgery and branched covering, may be performed on dynamically-constrained links in such a way as to preserve a transverse tight contact structure.
27.
k紧优双环网络及其无限族 总被引:19,自引:0,他引:19
在L形瓦理论的基础上,结合中国余数定理,证明了任给非负整数m,存在整数k(k>m),可以构造k紧优双环网络的无限族;给出了判断N个节点存在k(k≥0)紧优双环网络的一个算法。 相似文献
28.
Marc-Oliver Otto 《Transactions of the American Mathematical Society》2003,355(12):4847-4863
In this paper we define and discuss tight surfaces -- smooth or polyhedral -- in three-dimensional compact Euclidean space forms and prove existence and non-existence results. It will be shown that all orientable and most of the non-orientable surfaces can be tightly immersed in any of these space forms.
29.
From several large supercell MD simulations with an empirical tight-binding method, we have found the long-range structure on the dihydride Si(001) surface. This structure can be viewed as the well-known canted phase with domain walls. The formation energy of a single domain wall on the surface is estimated to be 1.3–1.5 eV. 相似文献
30.
Adela Vraciu 《Proceedings of the American Mathematical Society》2004,132(2):341-346
We study the smallest possible type of tightly closed ideals that are cofinal with the powers of the maximal ideal; this numerical invariant yields information about the tight closure of arbitrary ideals in the ring.