未知

Except one case, we can prove that the new graph operation preserving fully orientability.

我们会证明除了一个特殊的未知情况之外，这个新的图运算能保持图的可全定向性质。

Mere amateurs in 2009 will make ornithological history in China by discovering birds unknown to science.

在即将来临的2009年里，中国鸟类学史大概会由不打眼的业余人士通过发现未知的鸟类而刷新。

A protocol for probabilistic cloning of a class of three-qubit Greenberger-Horne-Zeilinger state and its orthogonal complement state by using three maximally two states as the qua山1m channel is proposed.

基于三个二粒子纠缠态作为量子信道，提出了一种类型的未知三粒子GHZ 态或其正交态的概率克隆方案。

To achieve better results,we make use of the discrete Radon transform and a set of discrete orthogonal Tchebichef polynomials to establish relationship between the projection moments and the image moments,and then estimate the unknown projections from the known projections using this relationship.

提出一种新的投影数据估计算法，利用离散Radon变换和Tchebichef正交多项式建立图像矩和投影矩之间的关系，并用这种关系从已知投影数据中估计未知投影数据，达到提高重建图像质量的目的。

This paper presents a new method to estimate unknown projections. To achieve better results, we make use of the discrete Radon transform and a set of discrete orthogonal Tchebichef polynomials to establish relationship between the projection moments and the image moments, and then estimate the unknown projections from the known projections using this relationship.

提出一种新的投影数据估计算法，利用离散Radon变换和Tchebichef正交多项式建立图像矩和投影矩之间的关系，并用这种关系从已知投影数据中估计未知投影数据，达到提高重建图像质量的目的。

The symmetric property and compact support are incompatible for orthogonal wavelets in function space, whether the properties of discrete orthogonal wavelets can be compatible is still unknown.

函数空间中正交小波的对称性和紧支性不能兼容，而离散空间中正交小波的性质能否兼容仍然是一个未知的问题。

The phylogenetic relationships among all taxa within the Acrididae (Orthoptera: Acridoidea) were largely unknown until now.

迄今，蝗科内各分类阶元之间的系统发生关系大部分是未知的。

In most cases is cause of ovarian cancer is unknown.

在大多数情况下是导致卵巢癌是未知之数。

However, it is unknown whether oxidative stress is the cause or the consequence of such diseases.

然而，它是未知的氧化重音是否是起因或后果的这样疾病。

Panhandle PCR is a quick and convenient new technique for cloning and identifying unknown partner genes.

这种特殊的PCR方法可以高度有效地克隆和鉴定已知片段两侧的未知基因片段。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。