查询词典 unitary invariant

As a consequence of an important theorem of algebraic topology, the invariants constructed by those diversity ways can be considered as identified via their unique isomorphisms. This concludes that the procedure of invariant construction gains a virtue of the model presented in this paper as being unrelated to whether there exists a symbolic represantation of images.

根据代数拓扑的重要定理，这些不同的构造方法所得的不变量在同构意义下是等价的，因此我们推论这种不变量的构造过程与图象是否有符号表示无关。

And these results not only extend the classical inequalities of martingale Hardy space, but also point out the close affiliation between the Boyd indices of rearrangement invariant martingale space and the characters of the martingales in it.

这些结果不仅推广了经典鞅Hardy空间中的不等式，而且深刻地揭示了重排不变鞅空间的Boyd指数和其中鞅性质的密切联系。

The scheme is based on non-mean quantisation parameters with invariant features,it utilises the concept of the 2-nd generation digital watermarking and uses the technique of quantisation watermarking.

针对商品包装图像在水印检测过程中图像会发生变形的问题展开研究，提出一种基于非均值量化系数特征不变的盲数字水印方案。

The method first embeds watermark into the geometric invariant Fourier-Mellin domain of an image to weaken the geometric distortion, brought by printing process, of the watermark in presswork, and the image is then used to create presswork via a legal printing process. Secondly, the method rectifies rescanned image from the presswork by using Radon transformation and the embedded watermark in it is detected. Since there is an obvious difference between the destruction degrees of the watermark caused respectively by legal and pirated printing process, we can judge whether a copy of presswork is valid or not just by computing the ratio of the successfully derived watermark and comparing it with a predefined threshold.

该方法先将水印嵌入到具有几何不变性的Fourier-Mellin域中，以削弱正版印刷过程中的几何失真对水印的破坏；再利用Radon变换对由扫描印刷品所获得的图像进行矫正，并从图像中提取嵌入的水印信息；由于正版和盗版印刷过程对水印的破坏程度区别明显，该方法最终通过计算水印提取的正确率来度量这种破坏，并将其与预先制定的阈值进行比较来判定印刷品的正伪。

By using truncation and sideband invariant switch like a cyclic shift, etc., the initial CAZAC sequence can be modified.

使用截断和边带不变量转换，如循环移位等，对初始的CAZAC序列进行修改。

One of the most important, most difficult, and most exasperating unsolved problems of operator theory is the problem of invariant subspaces

算子理论中最重要、最困难也最令人烦恼的未解决问题之一就是不变子空间问题。

One of the most important, most difficult, and most exasperating unsolved problem s of operator theory is the problem of invariant subspaces

算子理论中最重要、最困难也最令人烦恼的未解决问题之一就是不变子空间问题。

By using the circular invariant characteristic of the defined subspaces,a necessary condition on complete reachability is g...

利用所定义的子空间是循环不变子空间的特点，得到了切换线性奇异系统能达的必要条件。

In the third chapter, we study the structure of quasi-invariant subspaces of analytic Hilbert spaces over the complex plane.

第三章讨论复平面上解析Hilbert空间的拟不变子空间。

The calculated isotropic polarizability, polarizability anisotropy invariant and hyperpolarizability are 305.4, 188.3, and 1155.4 a.u., respectively.

计算的各向同性极化率、极化率各向异性不变量和平均超极化率分别是305.4、188.3、

Metrorrhagia is also gynaecological problems of common diseases.

崩漏是妇科常见病也是疑难症。

WordFTP gives you the convenience and timesaving you need.

wordftp让您的方便和省时您所需要的。