椭圆的

Secondly, the whole computation is divided into two levels: the finite field level and the elliptic curve level.

根据层次化、结构化的设计思路，将椭圆曲线上的标量乘法运算划分成两个运算层次：椭圆曲线上的运算和有限域上的运算。

The effect of the magnetic interference on the output of magnetic compass was analyzed and a ellipse model for the compass deviation was established. By analysis on the singularity of a coefficient matrix, the error coefficients of the ellipse model were identified by the least square ellipse fitting method.

分析了外界磁干扰对磁罗盘输出的影响，建立了罗差的椭圆模型，通过对系数矩阵的奇异性进行分析，采用最小二乘方法实现了对椭圆模型误差系数的辨识。

With the new method,the amount of scalar multiplications based on those curves can be reduced greatly.

在有效实现椭圆曲线密码体制的研究中，安全椭圆曲线的选取和标量乘法的快速计算又是其中的两个主要问题。

First, the discrete method of separation of variables is applied to the numerical solution of a model problem-the interface problem.

本文首先以一个模型问题——带内界面的二阶椭圆型方程为例，提出了一种求解带奇性的椭圆型方程的离散分离变量方法，并把这种方法用于复合弹性材料问题的求解。

In Chapter Ⅲ, the global stability and global attractivity of some planar autonomous systems are dealed with.

第二章考虑平面自治系统同宿轨族的一些定性性态，证明了系统至多存在一个最大椭圆扇形，得到此系统的轨线趋于奇点及同宿轨族、闭轨族、双曲扇形和椭圆扇形的存在性与不存在性的充分或充要条件。

The buckling failure measured includes: the relationship between controlled cyclic curvature and ovalization at buckling, and the relationship between the controlled cyclic curvature and the number of cycles to produce buckling.

力学行为包含有：弯矩－曲度的关系及椭圆化－曲度的关系，而皱曲损坏包含有：控制循环曲度－到达皱曲椭圆化的关系及控制循环曲度－循环至皱曲圈数的关系。

The calculating results are compared with the test data in available literatures and FEM results. The research results show that the plastic hinge model is precise and correct, which can satisfy with the actual engineering demands. The collapse pressure of perforated liner casing decreases with phrase angle, initial ovalization and diameter-thickness ratio increasing, and increases with the yield stress. The phrase angle and initial ovalization have greatly influence on the collapse pressure. The collapse pressure of perforated liner casing is slightly changed with the diameter and density of perforation when the diameter and density are smaller than 12mm and 120 shots per meter, respectively.

计算结果表明：筛管抗挤强度的塑性铰模型具有很高的计算精度和准确度，可以满足工程实际需要；筛管抗挤强度随着射孔相位角、径厚比和初始椭圆度的增加而降低，随着屈服强度的增加而增加，相位角和椭圆度对筛管抗挤强度影响比较显著；在射孔直径小于12 mm、射孔密度小于120 孔/ m 时，筛管抗挤强度随射孔直径和射孔密度增加变化不明显。

The plastic hinge model of perforated liner casing is built up to calculate the collapse pressure according to the strength and deformation behavior of perforated liner casing subjected to external pressure. The calculation equations of collapse pressure of perforated liner casing with initial ovalization are deduced by energy method. The influences of phrase angle, diameter of perforation, shot density, initial ovalization, diameter-thickness ratio and yield stress on the collapse pressure of perforated liner casing are studied. The model and equations are used to calculate the collapse pressure of an actual perforated liner casing as example.

摘摇要：根据煤层气完井筛管受力特点建立了筛管受力的塑性铰模型，利用能量法推导出带有初始椭圆度筛管抗挤强度的计算公式，分析了相位角、射孔直径、射孔密度、初始椭圆度、径厚比和屈服强度等影响因素对筛管抗挤强度的影响规律，并对某煤矿使用的筛管抗挤强度进行了计算，与已有的实验数据和有限元计算结果进行了对比。

The plastic hinge model of perforated liner casing is built up to calculate the collapse pressure according to the strength and deformation behavior of perforated liner casing subjected to external pressure. The calculation equations of collapse pressure of perforated liner casing with initial ovalization are deduced by energy method. The influences of phrase angle, diameter of perforation, shot density, initial ovalization, diameter-thickness ratio and yield stress on the collapse pressure of perforated liner casing are studied. The model and equations are used to calculate the collapse pressure of an actual perforated liner casing as example.

根据煤层气完井筛管受力特点建立了筛管受力的塑性铰模型，利用能量法推导出带有初始椭圆度筛管抗挤强度的计算公式，分析了相位角、射孔直径、射孔密度、初始椭圆度、径厚比和屈服强度等影响因素对筛管抗挤强度的影响规律，并对某煤矿使用的筛管抗挤强度进行了计算，与已有的实验数据和有限元计算结果进行了对比。

Roman and Egyptian transatlantic voyages - In 1975 two intact amphorae were recovered from the bottom of Guanabara Bay, near Rio de Janeiro, Brazil. In 1981 archeologist Robert Marx discovered thousands of pottery fragments in the same locality, including 200 necks from amphorae.

罗马和埃及的大西洋彼岸航行——1975年，在巴西里约热内卢附近的瓜纳巴拉湾海底发现了两个完整无缺的双耳细颈椭圆土罐。1981年，考古学家罗伯特麦克斯在同一地点发现了上千块陶瓷碎片，包括200块是来自双耳细颈椭圆土罐的颈部。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。