查询词典 investigates

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。

This paper investigates bond and anchor performance of FRP tendons concrete by felting test of 19 symmetrical pull specimens and 9 pull-out specimens.

本文通过19个对拉试件和9个拔出试件的粘结试验，对FRP筋与混凝土的粘结锚固性能做了相应的研究。

The chapter 3 investigates the constructive method which means that many combinatorial numbers, such as Stirling number, Bell number, harmonic number, Fibonacci number and the number of derangement, are represented to moments of some random variables. This method is used in the computation of combinatorial sums, discovery and proof of combinatorial identities.

第三章研究了构造性概率方法，即一些常见组合变量(以后统称组合数为组合变量)的概率表示，诸如Stirling数、Bell数、调和数、Fibonacci数、错排数都可以表示为一些随机变量的矩，这些概率表示可以用来研究组合和式的计算与恒等式的证明。

The Chapter 2, aiming at the issues in the research field of accounting policy choice, sets bases and research framework for the influencing factor analysis of accounting policy choice and the academic ground and research framework of corresponding contract theory. The second part, includes the Chapter 3, 4, 5, 6 and 7, Based on the research framework and theoretic bases illustrated in the first part, it emphasizes and investigates on the five external factors that would greatly influence the accounting policy choice: 1 Research on the restriction from accounting laws and regulations.

第二章主要是针对目前会计政策选择理论研究所存在的问题，提出会计政策选择影响因素分析的会计理论基础和研究框架，并为能够从契约理论和委托一代理契约关系理论的视角来解释和分析会计政策选择的影响因素问题，建立相应的理论基础和研究框架。

This paper investigates the performance of soft handoff in WCDMA network with the retrial group of finite capacity and geometric loss.

研究了WCDMA网中带有有限容量和以几何分布丢失的重试群时的软交换性能。

Numerical simulations and experimental investigates were carried out for unbalance response of a single disk flexible rotor system with far shaft end mounted on EORD.

通过数值仿真和实验研究远轴端EORD支承的单盘柔性转子系统的不平衡响应。

Based on systematic open flume flow experiments, this paper investigates the basic lows of thermal diffusion coefficients in water flow.

在系统的明槽水流试验基础上，本文探讨了水流热扩散系数的基本规律。

Ms Folsom wants to dispel the notion that her department investigates only the small fry.

福尔瑟姆女士希望能驱散那种认为她领导的部门只打苍蝇的看法。

Ms Folsom wants to dispel the notion that her department investigates only the small fry. The integrity report speaks tantalisingly of a "high-stakes, and multi-dimensional" probe, still under wraps but apparently involving bank officials at the highest levels. Something to look for next time the bank displays its laundry.

福斯姆女士希望人们消除她的调查只是针对小鱼小虾的印象，廉政报告急于宣布依然隐秘却显然涉及世行高层官员的"多方面的严重关系"的调查，我们期待世行下次能够展示脏衣服里还藏着什么。

This paper investigates the influence of fluid inertia force on the sudden unbalance response of flexible Jeffcott rotor supportedon squeeze film damper.

本文首先建立转子系统的微分方程，然后在考虑油膜惯性力的情形下，分析了转子的突加不平衡响应，并和不考虑惯性力的结果进行了比较。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。