椭圆的

To prevente-cash from double-spending and unlimited increase in the recordsofdatabases, an improved offline e-cash system based on elliptic curve cryptography was proposed.

为防止电子现金重复花费和数据库记录无限制的膨胀问题，改进了现有的利用椭圆曲线密码系统构造的离线电子现金系统。

After that the existence of a nontrival solution for the elliptic system is proved by means of Mountain-Pass Lemma. At last, we present two examples to illustrate that our condition is weaker than Boccardo and De.

Figueiredo(2002)的条件更弱的条件下满足条件，并利用山路引理证明了这类拟线性椭圆型方程组非平凡解的存在性，最后举出两个例子验证了文中所给条件的确比Boccardo和De。

Since theparabolic system is an approximation from the elliptic system under small ray angle,we may have reasons to question the result of the parabolic system under large rayangle.

由于抛物方程是椭圆方程在小掠射角条件下的近似，我们有理由对抛物系统在大掠射角情况下的考察结果的可靠程度保持怀疑。

The elliptic type governing equations, subject to free boundary conditions, have been solved to sutdy the velocity, temperature, and pressure distributions throughout, as well as local Nusselt numbers from 10/sup 2/ to 10/sup 6/ are presented for both symmetric and asymmetric heating cases, and the influence of wall temperature difference ratio, r'/sub T/ on the flow pattern is also considered.

由求解椭圆型统制方程式及利用自由边界处理方法，来计算整个流场的速度，温度和压力分布，以及在板面上之局部纳瑟数。葛拉修数的计算范围为102-106，且包括对称及不对称加热二种情形，尤其是二板温差比。gamma。/sub T/对流场的影响方面。

In a steady compressible flow, if the method of stream function is applied, the stream is satisfied by a specific boundary value problem for partial differential equation of quasilinear elliptic type when the flow is subsonic.

可压缩流动；马赫数；西安交通大学；函数方法；流函数；有限元解；稳定的可压缩流动中，若用流函数方法，当流动是亚音速时，则流函数满足一种特殊的拟线性椭圆型方程的边值问题。

A 40Hz event related potentialdetecting system is introduced here. The system employs the elliptic—type filters which have excellent edge features to extract signals of narrow band frequency . It exploits the correlation—threshold method proposed by us to cancel the musc1e artifacts.

详细介绍了我们建立的一套 40 Hz ERP(4 0 Hz事件相关电位)信号检测系统，该系统使用边缘特性最好的椭圆窄带滤波器提取窄带信号，采用我们提出的相关域值法很好地剔除了肌电干扰，并在微机上实现了实验自动化和结果自动统计。

Another reason that elliptical exercise machines are very popular is that they can be purchased easily for your own home.

另一个原因是椭圆运动的机器非常受欢迎的是，他们很容易就可以买到自己的主页。

If you have joint problems or chronic conditions, the elliptical trainer might be a better choice.

如果你有共同的问题或慢性的条件下，椭圆教练可能是一个更好的选择。

Unlike the elliptical galaxies, the spiral is rich in dust and gas for the formation of new stars.

不同的是椭圆星系，螺旋是在尘埃和气体丰富的新恒星的形成。

The force of gravity is not constant everywhere for elliptical form and rugged surface of the earth.

由于地球的椭圆形状及其高低不平的表面，重力不是到处都一样的。

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。