查询词典 one fourth

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 first indication of the caste system is outlined in the hymn to Purusha, the embodied human spirit, who is one-fourth creature and three-fourths eternal life in heaven.

第一个迹象是种姓制度中所概述的圣歌到Purusha ，人类精神的体现，谁是四分之一生物和四分之三的永恒的生命在天堂。

Milking yield and milk fat percentage were measured for one fourth wild,semiwild and domestic yak for 120 days.

对1／4野血牦牛、1／2野血牦牛和家牦牛的初产牛进行120天的产奶量和乳脂率测定。

No difference were found for daily milking yield for among three groups also no difference for milk fat percentage between one fourth wild and domestic yak,but the milk fat percentage of semiwild is lower than that of o...

经q检验，3组的日均挤乳量和1／4野血牦牛与家牦牛的乳脂率均差异不显著（P＞0.05），而1／2野血牦牛因野性较大，难以挤净含脂较高的二奶，以致乳脂率低于其它两组。

One fourth wild yak ; semiwild yak ; domestic yak ; milking performance

1／4野血牦牛； 1／2野血牦牛；家牦牛；产乳性能

The daily milking yield of one fourth wild,semiwild and domestic yak were 0.94±0.22kg,1.05±0.18kg,0.11±0.10kg respectively,while the milk fat percentage were 6.29%,5.6% and 6.24%.

结果：日均挤乳量，1／4野血牦牛为0.94±0.22kg，1／2野血牦牛为1.05±0.18kg，家牦牛为0.11±0.10kg；乳脂率，1／4野血牦牛为6.29％，1／2野血牦牛为5.6％，家牦牛为6.24％。

She was alone about one fourth of the time s she was beeped, the typical rate .

这里讲的是一个女孩子很孤独，经常一个人独处这样子。

Most babies are bottle-fed during some part of their infancy, and one-fourth of them are getting soy milk!

Worldnetdaily （最婴儿奶瓶喂养期间，将他们的部分起步阶段，和四份之一，他们得到豆奶！

Most babies are bottle-fed during some part of their infancy, and one-fourth of them are getting soy milk!

Worldnetdaily （最婴儿奶瓶餵养期间，将他们的部分起步阶段，和四份之一，他们得到豆奶！

It is said to burn only one fourth of the fuel of conventional diesel-powered cars.

据说这款车的耗油量仅为传统柴油车的四分之一。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。