查询词典 vacuous subset

The product from the elicitation phase is a subset of the goals from various parties.

在捕捉阶段得到的"期望列表"是各方面期望的一个子集。

Empty set is the subset of any set.

空集是任何一个集的子集。

Download a flat file of the entire database or large subset of the database.

下载一个平面文件的整个数据库或大型数据库的子集。

This subset of Virtual Site entry pages proved to be qualified both in content and link structure analysis.

借鉴网格研究中对虚拟组织的组织特性分析和网页非内容特征的挖掘，可以进行虚拟站点入口页面的定位。

This subset of Virtual Site entry pages proved to be qualified both in content and link structure analysis. Although this entry page s...

这提供了一种在减少索引规模前提下提高网络信息检索性能的解决方案。

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。

The proposed 2DSABS features can (1) avoid the bias problems of transforming the information into linear combinations of bands as does the traditional principal components analysis;(2) select each band by a simple logical operation, called CE feature scale uniformity transformation, to include different classes into the most common feature clustered subset of bands;(3) provide a fast procedure to simultaneously select the most significant features, and therefore dramatically improve the eigen-decomposition computational complexity.

本论文所提出的二维模拟退火波段选取特色有(1)避免转换资讯成波段的线性组合的偏差值问题，这是采用传统的主成份分析方式常见的问题；(2)利用一个简单的逻辑运算，称为「CE特徵维度齐一化转换」，将不同种类的资讯混合，形成具有共通特徵波段的群集子集合；(3)提供一个快速的程序，使能同时地选取最有意义的特徵，并显著地改善特徵分解计算的复杂性。

For example, exhaustive search through all subsets of variables to find the "best" subset (according to some score function), will be feasible only up to a point.

举例来说，详尽的搜索通过所有的子变量，以找到"最佳"变量子集在一定范围内将是可行的。

Endogenous fecal excretion was measured in a subset of children, and net calcium balance was calculated.

在部分孩子中测定钙的排泄量，计算钙的代谢平衡。

Shafie Fazel, cardiac surgery resident at TGH, University of Toronto surgeon/scientist program fellow and lead author of the study entitled,"Cardioprotective c-kit+ cells are from the bone marrow and regulate the myocardial balance of angiogenic cytokines," published today in The Journal of Clinical Investigation. When damaged heart tissue sends out an 'SOS' distress signal, this subset of bone marrow cells mobilizes quickly and stimulates the growth of new blood vessels in the heart.

一名来自多伦多大学的外科医生/科学家计划研究组的的成员，同时也是今天发表在《临床研究》中的"产生于骨髓的心脏保护细胞----C-kit+细胞调节着心肌血管生成因子的平衡"论文的主要作者----特里普勒总医院心外科住院医师这样描述，当心脏细胞受损时发出'SOS'的求救信号，这种骨髓细胞亚群快速动员和刺激新生心脏血管的生长。

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。。。。&