椭圆系统

The main focus of the thesis is the multiple point multiplication algorithm of elliptic curve cryptography.

本文主要研究椭圆曲线密码系统的多点乘算法。

A systemic research on the birefringence of side-hole fiber is presented. The research results show that the birefringence of circular-core side-hole fiber relies mainly on stress birefringence, its fast axis is parallel to the link line of the two holes, and its intrinsic birefringence increases exponentially with the angle and ellipticity of side holes.

本论文的主要研究结果和创新在于： 1、对边孔光纤的双折射特性进行了系统研究，提出圆芯型边孔光纤以应力双折射为主，两边孔连线方向为其快轴方向，其双折射大小与边孔张角和边孔椭圆度成指数关系。

Then with some special parameters selected,the equation of motion in the phase plane is obtained.

通过求解运动方程发现系统在时域的周期解为包含一类椭圆函数的反函数解析解。

Gravitational violence during mergers mixes orbits and redistributes energies and angular momenta; the result is that quiescently formed systems such as disks are turned into ellipsoids.

合并期间引力作用混合了彼此的恒星并且重新分配了角动量；其结果是被迫合并的系统变成了椭圆星系。

Each of these three methods uses a different mathematic background, including one-way hash function, Chinese remainder theorem, and elliptic curve cryptosystem, to ensure the security of the secret key, and to meet the requirements of dynamic management such as solution to problems like adding and deleting groups, modifying relationships among groups, and changing of secret key, etc.

这三种方法分别使用不同的数学背景，包括单向杂凑函数、中国余数定理、以及椭圆曲线密码系统，用以确保秘密金钥的安全性，并且达到动态管理问题的需求，诸如：群组的新增与删除、群组关系的异动、以及更改秘密金钥等问题的解决方案。

The SeaRovers large oval cock pit for comfortable re-entry and is standard equipped with individually contained double day hatches , an exclusive Point 65 feature - as well as a newly designed super-comfy back rest, an ergonomically designed seat, a retractable skeg and innovative new foot braces. It is available with an optional, ingenious rudder and rudder control system.

SeaRovers 大而椭圆的驾驶室提供舒适的进仓环境，标准配置，包含个人2天的仓口，这是 Point65的独家特色，以及一个新的超轻松的背部休息设计，一个人体功率学设计的坐椅，可收回的 skeg ，创新的脚瞪带，可选择一个设计精巧的裹和舵控制系统。

This paper describes the elliptical crystal spectrograph which is used to investigate X-ray spectroscopy of laser-produced plasmas.

描述了用于激光等离子体X射线光谱研究的椭圆弯曲晶体谱仪系统。

At the same time a new proxy signature scheme is proposed. The basis of both schemes is elliptic curve, which makes both schemes more secure and practicable.

所给出的两种数字签名方案都是基于椭圆曲线密码系统基础上的，并且具有比原方案更好的安全性和更高的实用性。

Content : the concept of computer graphics, development, application and software and hardware systems; Line, circle, oval basic graphics generation, curve and regional filling; The projection geometry and transform; Graphics cutting, blan

内容为：计算机图形学的概念、发展、应用和软、硬件系统；直线、圆、椭圆基本图形的生成、曲线及区域的填充；几何图形的投影与变换；图形裁剪、消隐处理；光照模型和图案映射等真实感生成技术，并用VC++进行交互式图形设计实例。

Using three dimensional fluxional function , the rolling force and energy parameters of oval round pass sequences for hot continuous bar rolling were analyzed.

采用三维流函数法对棒材热连轧时的椭圆-圆孔型系统进行了力能参数的解析，其结果与实测结果符合很好。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。