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三次椭圆

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Let K be the 3 cyclotomic field, Esubscript D(superscript λ: y^2=x^3-2^4 3^3 D(superscript λ) be an elliptic curve defined over K, where D∈K is a square-free algebraic integer and λ∈Z.

设K为三次分圆域,E下标 D(上标λ:y^2=x^3-2^4 3^3 D为定义在K上的椭圆曲线,其中D为K中无平方因子的代数整数,λ∈Z。

To this end, the ultrasound cardiograph is filtered and fuzzily boundary enhanced, a threshold is set to obtain a binary image, then the heart's boundary is got through ellipse curve fitting, cubic spline interpretation and smoothing.

首先对超声心动图像进行滤波以消除图像中的噪声,并运用模糊数学理论进行模糊边缘增强,提取超声心动图像的内外膜边缘信息;接著对超声心动图像作二值化处理和椭圆曲线拟合,初步得到心脏的内外膜边缘;再采用相应的三次样条插值和平滑技术,得到光滑、连续的心脏内外膜边缘。

In Chapter 3, a certain polynomial Hamilton system with 3 degree is given. By elliptic integral formulas, the monotonicity of the periodic orbits of this system is verified.

在众多文章中,讨论次谐轨的分岔都需要一个条件,那就是在同宿轨附近的周期轨是单调的,第三章给出了一个具体的三次平面Hamilton系统,利用椭圆积分公式验证了这个系统的一对同宿轨附近的周期轨的周期是单调的,这包含了三种情况,周期轨在右边同宿轨内部,在左边同宿轨内部以及在整个同宿轨圈外部。

In part III by using capacity theory and extension theorem of Lip-schitz functions we first discuss the uniqueness of weak solution ofnonhomogeneous quasilinear elliptic equations〓in space〓,which is bigger then〓.

第三部分首先用容量理论、Lipschitz函数延拓定理讨论了一类非齐次拟线性椭圆型方程〓在比〓更大的空间〓中弱解的唯一性。

The abstract result contains several concrete results in the literature and can also be used to deal with some new cases for resonant differential equations.In the introduction, we briefly introduce the development process of the variational methods. In Chapter 2, we list some basic knowledges refering to the variational methods, including the Sobobev space,—△ operator, the weak solution and the minimizing sequence methods and some minimax theorems. In Chapter 3, we introduce the research process of Hamiltonian system of second order and the semilinear elliptic problems, using the methods introduced previously. In Chapter 4, we prove the main theorem of the thesis, and apply it to the problems in the previous Chapter, and can also be applied to some new resonant cases.

在前言中,简要介绍了变分法的产生、发展过程,在第二章中我们介绍了有关变分法的一些基本知识,包括Sobolev空间,—△算子,弱解,极小化序列方法和一些极小极大定理,在第三章中我们介绍了非线性项有界或满足次线性条件,以及它满足推广的Ahmad-Lazer-Paul条件时,二阶Hamiltonian系统和半线性椭圆问题的研究历程,最后在第四章中我们证明了本论文的主要定理,并把它应用到第三章的问题中,使得前面的几种共振的情形都可以统一到这个抽象的结果中。

In Chapter 4, we consider the qusilinear elliptic systems with the homogeneous Neumann boundary condition, and obtain the existence and multiplicity of positive solutions.

在第四章中,我们讨论带有齐次Neumann边界条件的拟线性椭圆型方程组(方程和第三章的一样,边界条件不同),研究了正解的存在性和多解性。

In Chapter 3, we research the subelliptic equations on polarizable Carnot group.

第三章研究可极化Carnot群上的非线性次椭圆方程。

Furthermore,it can represent the elliptic curves,parabola and other quadratic curves without using rational form.

给出了一种基于三角函数的类三次参数曲线,该曲线不仅具有类似于三次Bézier曲线的诸多性质,而且无需有理形式即可精确地表示椭圆、抛物线等二次曲线。

The contents of this paper are as follows:Firstly, we study the following semilinear elliptic equation with Dirichlet boundaryvalue problem:in the subcritical growth case we obtain at least two nontrival solutions by using the three-critical-point theorem and the reduction method.

我们首先研究下面半线性椭圆方程Dirichlet边值问题:在次临界增长情况下,利用变分方法中的归约方法和三临界点定理,得到了方程至少有两个非平凡解。

Cubic non-uniform trigonometric polynomial curves with multiple shape parameters are presented in this paper. They are C^2-continuous for a non-multiple knot vector and C^3-continuous for a uniform knot vector respectively. The ellipses can also be represented by them.

对于非均匀节点向量给出了一类带多个形状参数的三次三角多项式曲线,这类曲线具有三次多项式B样条的许多重要性质:对非重节点为C^2-连续,对均匀节点则为C^3-连续,能直接表示椭圆。

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