椭圆性

Shao proposes an improved digital signature scheme with message recovery based on ECC.It has overcome the weakness of Tzeng's scheme that lacks nonrepudiation and forward security.

Shao的基于椭圆曲线的具有消息恢复的数字签名改进方案，克服了Tzeng方案的缺乏不可否认性和前向安全性的弱点。

The synchronous satellite is used to support some small bussinesses in the time with low business amount which nonsynchronous satellite can not cover like late at night and small hours,thus to insure the requirement of satellite communication of China with low investment cost.

本发明公开了一种中国综合卫星通信系统，它是由同步卫星和若干个非同步卫星构成，所述的非同步卫星是由中轨卫星或椭圆轨道卫星星座组成，具有区域性和时限性，即非同步卫星采用只在每天业务高峰期覆盖我国的时限区域性星座，在非同步卫星不能覆盖的低业务量时段如深夜和凌晨，可由同步卫星来支持这些小的业务量。

Secondly, by using the Sobolev inequality on the C-C spaces we prove a Fefferman-Phong type lemma. Based on which we provide nonexistence theorems to three kinds of nonlinear subelliptic parabolic equations through a relatively unified method.

其次，利用Carnot-Caratheodory空间上的Sobolev不等式证明了一个Fefferman-Phong型引理，并用比较统一的方法证明了三类非线性次椭圆抛物方程解的不存在性判定定理。

This paper discusses the existence of positive solutions for sublinear semipositone elliptic problems.

借助-ΔDirichlet边值问题的主特征值λ1相应的特征函数的性质，利用上、下解方法，讨论了一类次线性半正单调椭圆问题正解的存在性。

The contents of other metal elements Na, Mg, K, Al, Mn and Pb in lagenal otoliths were not significantly different from those in utricular and saccular otoliths.

瓶状囊耳石中其它金属元素Na、Mg、K、Al、Mn、Pb的含量与球囊和椭圆囊耳石相比无显著性差异，但Zn、Ba、Cu的含量低于球囊耳石。

The contents of other metal elements Na, Mg, K, Al, Mn and Pb in lagenal otoliths were not significantly different from those in utricular and saccular otoliths.

瓶状囊耳石中其它金属元素Na、Mg、K、Al、Mn、Pb的含量与球囊和椭圆囊耳石相比无显著性差异，但Zn、Ba、Cu的含量略低于球囊耳石。

By the detail discussion onthe hardware of the smooth path control system of single-chip microcomputer developed and the system software including new type continuous smooth path software, the analyzing of international standard program languageISO andthe attempt to developmental application in the smooth path control systemand experiment have been done, the description of the smooth path of the non-circular curive such as ellipse, hyperbola, parabola and their realignment has been realized by the way directly to input their parameters. The correctnesson the priciple and the method of the continuous smooth path control and the forthright on programing method hayed been proved by the experiment, new way to realize higher accracy continuous smooth path control has been developed.

通过对所研制成功的单片微机平滑轨迹控制系统硬件和包括新型的连续平滑轨迹生成软件在内的系统软件的详细描述，进行了国际通用标准编程语言△ISO标准编码的分析和在平猾轨迹控制系统中扩展应用的尝试和实验，实现了椭圆、抛物线、双曲线等非圆曲线及其组合的直接参数输入的平滑轨迹轮廓描述，并通过实验证明了连续平滑轨迹控制原理及方法的正确性和程序编制的简捷性，为实现高精度连续平滑轨迹控制开辟了一条新的途径。

On the basis of the ID-based signature schemes, this paper presents a proxy blind signature scheme using bilinear parings, which satisfies the security properties of both the proxy signature scheme and the blind signature.

文章结合两者的优点，利用椭圆曲线上的Weil对的双线性性，构造了一个基于身份的代理盲签名方案。

By means of a priori estimates, a nonexistence theory for a class of quasilinear parabolic equations is established.

在第一章中，利用ODE方法，证明了一类散度型拟线性椭圆型方程边值问题径向解的存在性。

In the second chapter we consider the existence of multiple nontrivial solutions for a class of quasilinear elliptic boundary value problems.

在第二章，我们运用下半连续及鞍点定理得到了一类拟线性椭圆边值为体的多重非平凡解的存在性。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。