查询词典 vacuous subset

In addition to highlighting a new class of organizational problems, we argue that in a world of boundedly rational actors, incomplete guides to action in the sense of providing only a subset of underlying goals prove more effective at directing and coordinating behavior than more complete representations of underlying objectives.

除了强调一类新的组织问题，我们认为在有限理性者的世界中，提供子集目标的不完全行动指南在指导和协调行动方面比完整陈述的基本目标要有效得多。

A new method basing on CC structure codeis proposed to computerize the calligraphical rule for automatically design the structure CC subset.

摘要］ 在[1.2]中我们提出基于汉字结构码量化传统书法规则知识方法来完成合体汉字字形的自动设计问题。

A new method basing on CC structure codeis proposed to computerize the calligraphical rule for automatically design the structure CC subset.

在[1.2]中我们提出基于汉字结构码量化传统书法规则知识方法来完成合体汉字字形的自动设计问题。

This dissertation investigates the construction of pseudo-random sequences (pseudo-random numbers) from elliptic curves and mainly analyzes their cryptographic properties by using exponential sums over rational points along elliptic curves. The main results are as follows:(1) The uniform distribution of the elliptic curve linear congruential generator is discussed and the lower bound of its nonlinear complexity is given.(2) Two large families of binary sequences are constructed from elliptic curves. The well distribution measure and the correlation measure of order k of the resulting sequences are studied. The results indicate that they are "good" binary sequences which give a positive answer to a conjecture proposed by Goubin et al.(3) A kind of binary sequences from an elliptic curve and its twisted curves over a prime field F_p. The length of the sequences is 4p. The "1" and "0" occur almost the same times. The linear complexity is at least one-fourth the period.(4) The exponential sums over rational points along elliptic curves over ring Z_ are estimated and are used to estimate the well distribution measure and the correlation measure of order k of a family of binary sequences from elliptic curves over ring Z_.(5) The correlation of the elliptic curve power number generator is given. It is proved that the sequences produced by the elliptic curve quadratic generator are asymptotically uniformly distributed.(6) The uniform distribution of the elliptic curve subset sum generator is considered.(7) We apply the linear feedback shift register over elliptic curves to produce sequences with long periods. The distribution and the linear complexity of the resulting sequences are also considered.

本文研究利用椭圆曲线构造的伪随机序列，主要利用有限域上椭圆曲线有理点群的指数和估计讨论椭圆曲线序列的密码性质——分布、相关性、线性复杂度等，得到如下主要结果：(1)系统讨论椭圆曲线-线性同余序列的一致分布性质，即该类序列是渐近一致分布的，并给出了它的非线性复杂度下界；(2)讨论两类由椭圆曲线构造的二元序列的&良性&分布与高阶相关性(correlation of order κ)，这两类序列具有&优&的密码性质，也正面回答了Goubin等提出的公开问题；(3)利用椭圆曲线及其挠曲线构造一类二元序列，其周期为4p(其中椭圆曲线定义在有限域F_p上)，0-1分布基本平衡，线性复杂度至少为周期的四分之一；(4)讨论了剩余类环Z_上的椭圆曲线的有理点的分布估计，并用于分析一类由剩余类环Z_上椭圆曲线构造的二元序列的伪随机性；(5)讨论椭圆曲线-幂生成器序列的相关性及椭圆曲线-二次生成器序列的一致分布；(6)讨论椭圆曲线-子集和序列的一致分布；(7)讨论椭圆曲线上的线性反馈移位寄存器序列的分布，线性复杂度等性质。

Description logic is a formal language for representing knowledge and it is a decidable subset of first-order logic.

1引言 描述逻辑是知识表示的一种形式化语言匡，适合表示关于概念和概念层次结构的知识，因此也叫做概念表示语言和术语逻辑。

The decidual NK cells were collected and cell subset change of the two groups was analyzed by flow cytometry.

目的通过检测弓形虫感染后早孕蜕膜自然杀伤细胞亚群的变化，探讨其与弓形虫感染致不良妊娠结局的相关性。

The model integrated site-speific factors and was calibrated to field epidemiological data from 3 subset villages.The dichotomic method was then used to predict different control measures.

利用蒙特卡罗模拟对模型进行模拟，采用二分法用3个村的数据来效验模型，并用经效验的模型来分析在3种控制策略下本地血吸虫病传播的趋势。

A subset of misclassified endocervical adenocarcinomas may account for some HPV-positive uterine carcinomas reported as primary endometrial carcinomas.

一些HPV阳性、被诊断为子宫内膜癌的子宫腺癌实际上是原发于宫颈的腺癌。

Loss of INI1 expression may also be helpful to distinguish epithelioid MPNST from metastatic melanoma in a subset of cases.

在一些病例中，INI1表达的缺失同样能鉴别上皮样MPNST和转移性黑色素瘤。

We conclude that (1) S100A1 is a specific and sensitive immunohistochemical marker to differentiate nephrogenic adenoma from prostatic adenocarcinoma;(2) AMACR immunostaining does not seem to be a useful marker in distinguishing between these 2 lesions;(3) given that both S100A1 and AMACR have been reported to be expressed in renal tubular cells and in a subset of renal cell neoplasms, our findings confirm the histogenetic relationship between nephrogenic adenoma and renal tubular epithelium.

我们总结认为：（1）鉴别肾源性腺瘤和前列腺腺癌，S100A1既特异又敏感；（2）AMACR免疫染色鉴别这两种病变，效用不佳；（3）文献报道S100A1和AMACR均表达于肾小管上皮和部分肾细胞肿瘤，在此前提下，我们的结果证实了肾源性腺瘤和肾小管上皮之间的组织发生关系。

The receding calculations and experiment analyses in this subject are built on the blood cast of pig tongue.

本研究课题的前期工作是采用猪舌血管铸型模拟人舌而进行的数值计算与实验分析。

"Each human infection constitutes an opportunity for genetic modification of the virus through reassortment, mutation, or both...."

&每一次人类的感染都暗藏着一次基因修改的机会，无论是通过病毒的整合、突变或者兼而有之。。。。&