不变的

In Chapter 1,we investigate BN-pairs of classical groups over local rings.We construct the BN-pairs arising from classical groups of linear,orthogonal and symplectic type over local rings.

本文主要研究局部环上典型群的BN-对，二面体群的BN-对和不变式环，有限域上典型群的极大子群和根子群的有理不变式域的结构。

At many occasions they arise quite natu-rally.For example,they appear in the Iwasawa decomposition of the isometry group ofa non-compact Riemannian symmetric space.Also,every connected homogeneous Rie-mannian manifold of non-positive sectional curvature can be represented as a connectedsolvable Lie group with a left-invariant Riemannian metric.

它们出现在非紧致黎曼对称空间的等距群的Iwasawa分解中；任一非正截面曲率的连通齐性和黎曼流形可以表为带有左不变黎曼度量的连通可解李群等，带有左不变黎曼度量的幂零及可解李群的微分几何，调和分析和谱几何是重要的研究课题。

After introducing some basic results from ergodic theory, two probIems related to the dynamical system are studied: first the existence of absolute continuous invariant measures, and then their computation. They correspond to the functional analysis and numerical analysis of the Frobenius-Perron operator associated with the dynamical system.

首先介绍了遍历理论的一些经典结果；然后着重研究了对应于混沌映射的绝对连续不变测度的存在性与计算问题，这归结于相应的Frobenius-Perron算子的泛函分析与数值分析；最后《确定性系统的统计性质》介绍了Shannon熵、Kolmogorov熵、拓扑熵以及Boltzmann熵，并给出了不变测度的一些最新应用。

Filter-based matching algorithm uses a bank of Gabor filters to capture both local and global details in a fingerprint as a compact fixed length Feature Vector. Invariant-moment matching algorithm is used to overcome the deformation in fingerprint.

用一组Gabor滤波器获取指纹图像的局部信息和全局信息，并表示成简洁的指纹滤波特征向量，用于滤波特征匹配；针对指纹图像中存在的三种形变，采用图像的不变矩算法进行不变矩的匹配。

For a bold writer full of creativity, the future undoubtedly will bring the readers more surprises and fresh feelings, but if the relationship of the old characteristic and the changing characteristic, or the changing characteristic and the flubdub can not be clearly and correctly divided, the brilliant time of prose producing can hardly be recreated and even can be immersed into the flickleness of changes.

对于一个勇于求新，敢于突破的作家来说，未来无疑将会带给读者更多的惊喜和新鲜感受，但如果不能很好处理坚守固有风格与求新求变的关系，如果不能很好的区分创新求变与哗众取宠的关系，甚至陷入为变化而变化的浮躁心态中，散文创作的再辉煌局面将很难实现。

Gregory Bateson put it telegraphically when he said,"Adaptation is change in the service of nonchange."

格雷戈里贝特森则用一种电文式的简洁来说明这一点：&适应就是以万变求不变。&

Do not trouble yourself much to get new things, whether clothes or friends, Tur n the old, return to them.

找旧的，回到那里去。万物不变，是我们在变。

In malignant room skin tumour early phase can see something without the aid of instruments in regular or opaque dirty tier or wall have a lot of white or the gray pellet and form festival or the lamina on tier of pleurae Piece with the development of tumour change thickly long and change thickly long full pleura surface tubercle the tumour tubercle stretches room skin to all sides postpone continuing becoming movie cyst lungs uses the person The cellar is getting smaller as shrinking more and makes to be put into much trouble inclining a chest wall subside.

在恶性间皮瘤早期，肉眼可见在正常或不透明的脏层或壁层胸膜上有众多白色或灰色颗粒和结节或薄板块，随着肿瘤的发展，胸膜表面愈来愈变厚，长满结节，间皮瘤结节向四方伸延，连续成片，包囊肺脏使其窖越缩。。。在恶性间皮瘤早期，肉眼可见在正常或不透明的脏层或壁层胸膜上有众多白色或灰色颗粒和结节或薄板块，随着肿瘤的发展，胸膜表面愈来愈变厚，长满结节，间皮瘤结节向四方伸延，连续成片，包囊肺脏使其窖越缩越小

A numeric method of calculating invariant probability distribution for chaotic map is derived. The method is particularly useful for some realistic experimental systems whose transfer probability matrixes are easy to be determined.

提出一种计算混沌映射不变分布的数值方法，该方法特别适合于求解从实验中获得的样本数少，但转移概率易于确定的实际混沌系统的不变分布。

Comparing with the traditional modulo addition,since those to-be-flipped pixels are kept unaltered,the pepper-and-salt noise is efficiently avoided.

和传统的模加方法相比，保持跳变像素不变可以有效避免椒盐噪声。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。