查询词典 affine transformation

This paper studies the construction principle and main algebraic properties of AES S-box,points out the S-box has these characteristics that periods of affine transformed pair is 4,periods of iterative-output is less than 88,strict avalanche criterion distance is 432,the algebraic expression has only 9 items and so on.

研究了AES S盒的构造原理和主要代数性质，指出了AES S盒的仿射变换对周期为4，迭代输出周期不大于88，严格雪崩准则距离为432，代数表达式只有9项等。

Based on these characteristics, an improved S-box was constructed, with period of affine transformed pair as 16, period of iterative-output as 256 and algebraic expression of improved S-box and InvS-box as 252 items and 254 items respectively.

该改进S盒具有周期16仿射变换对，迭代输出周期为256，而且S盒和逆S盒代数表达式项数分别达到252项和254项。

Applying the techniques of real radical ideal, P-radical ideal , decomposition of semi-algebraic set in ( [72] ), affine Hilbert polynomial and B-net form of polynomials on simplex, this paper obtains two theorems of real C〓 piecewise algebraic variety dimensions and the real Nullstellensatz in C〓 spline ring.

4：应用多项式在单纯形上的B-网形式以及文献（[72]）中的实根理想，锥根理想，半代数簇分解定理，本文得出了实C〓分片代数簇的二个维数定理和C〓样条空间的实零点定理。

The potential produced by a charge distribution on the self affine set and its analytic properties are studied.

研究了关于自仿集上电荷分布的势论及有关分析性质。

This paper proposes a novel algorithm of Feature Match Based on Corner Affine Invariant. It selects corners as extracting feature of the image matching, and these corners are characterized by their orientation and angular width.

该方法是使用角作为图像匹配选取的特征，通过仿射不变处理来消除图像缩放、扭曲、旋转和平移产生的影响，实验表明，该算法具有良好的匹配性能，可以对差异较大的图像对进行特征匹配

The analysis of affine approximation error shows that the proposed method can achieve sub-pixel accuracy when the surface does not curve too much.

文中对仿射变换近似带来的精度损失进行了分析，证明该方法能够达到分象素的精度。

It has been widely used in recent years, for it not only preserves several advantages of B-spline surface, especially the affine- invariance, but also has some special advantages such as adaptability to arbitrary topology which parameter surface doesn't have.

它不仅具备B样条曲面仿射不变性等良好性质，还具有参数曲面所没有的任意拓扑适应性等特点，因而近年来得到了广泛的应用。

This technology not only preserves the properties of localness and affine-invariance of B-spline surface, but also has some special advantages such as adaptability to arbitrary topology which parameter surfaces dont have. These good qualities makes subdivision surface used widely in recent years.

它不仅具备B样条曲面的局部支承性、仿射不变性等良好性质，而且具有参数曲面所没有的任意拓扑适应性等特点，因而近年来得到广泛的应用。

Secondly, for the boundary correspondence of affine stretch on hyperbolic regions, we prove that the above conclusion is also true. Finally, we pose a sufficient and necessary condition for the same conclusion.

最后利用退化的四边形序列，给出了拟对称同胚的极值拟共形延拓的最大伸缩商、四边形模之比的上确界及拟对称同胚的边界伸缩商三者相等的一个充要条件。

Experiments show that the algorithm can extract the affine-invariant line skeleton, resist the noise and automatically determine the branch point and key point in the skeleton.

该算法能够从散乱点集上得到一维"线"性的骨架，具有仿射不变性，能够抵抗一定的噪声，自动确定骨架上的关节点和分支点。

The shaping method of noncircular part and the tool holder's radial motion characters in noncircular turning process are discussed in detail in the thesis.

论文详细研究了非圆零件的成型方法和加工过程中刀架的径向运动规律。

I have not really liked him,I do not like his this kind of disposition.

我没有真的喜欢他，我不喜欢他的这种性格。