查询词典 invariance

For diffusive Predator-Prey model with Holling-Ⅲ functional response without time delay, shooting argument together with LaSalle's Invariance Principle and the Hopf bifurcation theorem are applied to prove the existence of traveling wave solutions and small amplitude traveling wave train solutions.

在数学理论的研究中，行波解可以揭示方程本身的许多重要性质；在实际应用中，行波解可以很好的表现自然世界中的振荡现象。因此，对反应扩散方程行波解的研究具有非常重要的意义。

The dissertation includes:◆General research of canonic VSC The contents are following: the cause and eliminating approach of chattering; Invariance property; the relation between VSC and high-gain linear feedback control.

讨论了产生不变性的条件；揭示了VSC与大增益线性反馈控制的等价关系；提出了用切换面邻域内的稳定性来分析抖动起因的方法。◆研究了不确定系统的VSC设计分别针对满足匹配条件但集总不确定部分上界不确知、不满足匹配条件但满足广义匹配条件、不满足广义匹配条件等情况，研究了其VSC设计问题。

David Layzer, writing in his semiscientific book Cosmogenesis, argues that "the central property of life is not reproductive invariance, but reproductive instability."

戴维雷泽尔在他科普性的书《宇宙发生说》中辩称，&生命的核心价值不在它繁殖的不变性，而在它繁殖的不稳定性。&

David Layzer, writing in his semiscientific book Cosmogenesis, argues that "the central property of life is not reproductive invariance, but reproductive instability."

戴维雷泽尔（5）在他半科学性的书《宇宙发生说》中辩称，&生命的中心价值不在它不变的复制，但在它不稳定的复制。&

David Layzer , writing in his semiscientific book Cosmogenesis, argues that "the central property of life is not reproductive invariance, but reproductive instability."

戴维雷泽尔在他的科普性书籍《宇宙发生说》中辩称，&生命的核心价值不在于它繁殖的不变性，而在于它繁殖的不稳定性。&

In this thesis, an improved method is proposed to overcome the problem that the circular color histogram method does not take the spatial information of colors into account , combines spatial distribution information with image color features. The presented method adopt color space which has the visual uniform , three components carries on no laddered quantification, three components weighting summation composes the row of the circular color histogram construction, and improves retrieval quality, while rotation and translation invariance of color histogram are kept.

针对颜色直方图对图像的空间信息表现不够的问题，本文提出并实现了环形颜色直方图的改进方法，将图像颜色特征和颜色的空间分布信息相结合，采用具有视觉一致性的颜色空间，并把各通道分别进行非等间隔量化，采用各通道向量加权的形式把各通道组合为一个特征向量，提高了检索质量，并保持了原有算法的有效性和旋转不变性。

It has been widely used in recent years, for it not only solves some problems in computer graphics, such as arbitrary topology and compatibility, but also retains several advantages of traditional NURBS, including the properties of localness and affine-invariance.

由于细分曲面不但解决了计算机图形学中遇到的任意拓扑和一致性表示问题，而且还保留了传统NURBS曲面表示所具有的局部性、仿射不变性等良好性质，因而近年来得到广泛的应用。

The Finite Difference Measured Equation of Invariance is used to extract the capacitance matrix of multiconductor transmission lines. The iterative sparse matrix solver is replaced by the LU decomposition method.

随着半导体工艺水平的不断提高，集成电路正朝着高速度和高密度两个方向飞速发展，准确估计电路中的互连结构对电路特性的影响已成为一个亟待解决的问题。

The gauge invariance of noncommutative gauge field coupled with matter field is studied.

我们讨论了非对易空间与规范场耦合的物质场的规范对称性。

Study on the rotative invariance in the phase encrypted image and the phase-ring decryption.

光学图像相位加密中旋转不变性的实现及环形相位解密。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐