覆盖

Tsang has made a reseach on the approximate operator in covering approximation space, and proposed a more reasonable covering rough set model.

Tsang对覆盖近似空间中的近似算子进行了研究，提出了一种较已有模型更合理的覆盖粗糙集模型。

Something, such as vegetation, covering the surface of the ground.

覆盖植物：如植物一样覆盖地面的东西

There are two problems,the first is the fact that its natural covering under the self-affine transformation is not a efficient covering, the second is the fact that the limiting frequency of some digits or fibers may not exit.

其困难在于由于其仿射背景，导致它们的自然覆盖不是一个有效的覆盖，以及某些点或纤维的频率可能不存在导致维数估计的困难。

The latest version of navigation electronic map data covers 4 municipalities, 333 prefectural level cities in mainland area, as well as Hong Kong, Macao, Taiwan, coving 90% population and 95% GDP in the mainland.

最新版导航电子地图数据覆盖了中国大陆地区的4个直辖市和333个地级市，以及香港、澳门、台湾地区，覆盖范围占中国大陆人口的90%和GDP的95%，真正可导航POI数量达到500万件，实测道路里程达377万公里。

Sediment deposited by flowing water, as in a riverbed, flood plain, or delta.

覆盖层，超覆层覆盖在有价值的矿石沉积物之上的物质

Set cover greedy algorithm is one of the commonly used algorithms for the test set problem. It is an open problem if the approximation ratio 2ln n+1 directly derived from the set cover problem can be improved.

集合覆盖贪心算法是测试集问题的一个常用近似算法，其由集合覆盖问题得到的近似比21nn+1能否改进是一个公开的问题。

For objects with a high dimensionality feature space and a data set with large amount of samplesthat belong to many different classes, it is useful to divide and discompose them according to MIDA.

一个值得研究的方案是将覆盖的思想(或基于覆盖的对数据的描述方法)应用于特征选择的主分量分析，为此，引入点对的概念，提出了点对主分量分析方法DPCAA(Double-point Principal Component Analysis Algorithm)。

Since the dismutation of superoxide radicals by SOD is a reaction that is rate-limited by diffusion and enhanced by electrostatic guidance, all these structural features may be related to GP-MnSOD's high catalytic activity: first, Lys38 may increase the effective enzyme-substrate association rate by enhancing the electrostatic gradient at its substrate channel; second, an excess of acidic over basic residues makes the negative surface potential of GP-MnSOD more larger than those of other known MnSODs. This may enhance the reaction rate by reducing futile collisions of superoxide radicals with GP-MnSOD's surface.

因此，GP-MnSOD的上述结构特征可能与GP-MnSOD的较高酶活有关：首先，Lys38增加了底物通道口的正静电势梯度，从而可能促进了GP-MnSOD的活性中心与底物的有效结合速率；其次，GP-MnSOD表面覆盖的过量酸性残基使得它比其它MnSOD在底物通道以外的蛋白表面更多地被负静电势所覆盖，这可能有效地减少了超氧阴离子与GP-MnSOD表面的无效碰撞，从而提高了反应速率。

Loop to ligate the appendical root or double titanium clips clipping,23 cases were directly used laparoscopic appendectomy to knot the appendical root,15 cases were used the interrupted suture appendectomy stump and fibrin glue coverage,9 cases of appendical remnant tissue were removed,covered with fibrin glue and placed silica drainge tube.

loop阑尾根部双重套扎或双重钛夹夹闭46例，直接腹腔镜下丝线打结阑尾根部23例，间断缝合阑尾残端加医用生物蛋白胶覆盖15例，清除阑尾残余组织加医用生物蛋白胶覆盖残端，放置硅胶引流管9例。

Methods:Ninetythree patients with root gangrenous perforative appendicitis were treated with laparoscopic appendectomy from Jun.2002 to Dec.2007,and the clinic data were summarized.When dealing with the appendical root,46 cases were used double Endoloop to ligate the appendical root or double titanium clips clipping,23 cases were directly used laparoscopic appendectomy to knot the appendical root,15 cases were used the interrupted suture appendectomy stump and fibrin glue coverage,9 cases of appendical remnant tissue were removed,covered with fibrin glue and placed silica drainge tube.

总结2002年1月至2007年12月应用LA治疗93例坏疽、化脓性阑尾炎合并穿孔患者的临床资料，术中处理阑尾根部时，使用 Endoloop阑尾根部双重套扎或双重钛夹夹闭46例，直接腹腔镜下丝线打结阑尾根部23例，间断缝合阑尾残端加医用生物蛋白胶覆盖15例，清除阑尾残余组织加医用生物蛋白胶覆盖残端，放置硅胶引流管9例。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。