树

Then defined the tasks on network layer, such as topology management, short address management and routing. Secondly, this paper designed the functionality of different nodes and the state machine, implemented beaconed tree mode topology and the corresponding routing protocol.

其次，本文在讨论的基础上定义了树状拓扑中各类节点的基本协议行为，给出了各类节点的状态机，实现了树状拓扑中基于Beacon技术的树状路由协议；在Mesh拓扑的设计中，本文采用了Non-Beacon模式，同样根据节点的功能进行了分类，最终在Router~2节点上实现了改进之后的AODV路由协议。

By introducing XOR operation and one-way function chains to group key management schemes based on the keys tree, a new group key management scheme based on the keys tree, XOR operation and one-way function chains is proposed. Initialization, member adding and member evicting operations are introduced. The new scheme is compared with three other group key management schemes which are based on the keys tree:SKDC, LKH, and OFT. As far as transmission, computation and storage costs are concerned, the performance of the new group key management scheme is the best.

摘 要：在基于密钥树的组密钥管理方案中引入了XOR操作以及单向函数链，提出了一种新的基于密钥树、XOR操作以及单向函数链的组密钥管理方案，介绍了新方案中初始化、成员加入以及成员退出的操作，将新方案与3种基于密钥树的组密钥管理方案SKDC，LKH，OFT进行了比较，数据表明：就传输、计算以及存储开销而言，新的组密钥管理方案性能最优。

You select your indents, fonts, margins, tree menu background color, whether to begin each page with an open tree or closed tree.

您选择缩进，字体，边距，树菜单的背景颜色，是否开始的每一页与一个开放的树或关闭的树。

This article contraposes this character and makes use of the FTA to construct the fault tree of the electric parameter outrunning. The fault tree is analyzed and calculated to gain the significant sectors, which have greatly effects on the manufactory. Then the suggestion is concluded that can decrease the dielectric loss and partial discharge, and frequently improve the quality of final product.

针对它的种种特点，本文运用故障树分析法，构造了套管电气参数超标缺陷树，通过对于缺陷树的分析和重要度计算得到生产过程中影响产品性能的重要环节，从而提出了有效降低介质损耗与局部放电水平，提高成品套管稳定性的根本手段。

By analyzing the advantage and limitations of attack tree model, present a demand that we establish a new attack model for anti-attack test by integrating the attack multi-attribute classification.c Establish a penetration attack tree model for anti-attack test by integrating characteristics of multi-attribute attack classification and attack tree model, redefining attack tree nodes and redescribing the relations of them.

建立了一个面向抗攻击测试的渗透攻击模型。综合多属性攻击分类与攻击树模型的特点，通过对攻击树节点的重新定义和节点间关系的重新描述，建立了一个面向抗攻击测试的基于攻击树的渗透攻击模型。该模型能够描述渗透攻击不同阶段的特征，各种渗透攻击之间的属性关系和条件依赖关系，进而能够合理的组织渗透攻击，为渗透攻击的实施提供方案，从而满足抗攻击测试中对目标精确测试的要求。

It also concludes that the classification result is obviously better using C5.0 decision tree algorithm based on the combining data processed by a sequence of atmospheric correction, data fusion and transformed by NDVI, NDBI and Tasseled Cap than the raw data.

研究发现，C5.0决策树算法用未处理的资料生成决策树的效果较差，而经大气校正和数据融合后计算出NDVI、NDBI及缨帽变换的前3个分量的组合数据生成的决策树深度最小，并且分类精度最高。

This study aims to investigate the role of the electric field intensity in the water treeing phenimena under the simultaneous consideration of the physical and chemical properties of XLPE cable insulation.

正确评价长有水树的材料的电场分布，对于理解水树的生长机理以及水树引起的介质击穿是非常重要的。

The most essential part of the dissertation is the study on classic ID3 algorithm and Apriori algorithm. The main works are listed as follows:①The detailed theoretical background of ID3 algorithm is introduced, and based on the treeing rules. The decision tree is obtained through the practical learning of this algorithm.

本文重点对决策树方法的经典算法ID3算法和关联规则经典算法Apriori算法进行了研究，完成的主要工作如下：①在决策树方面详细介绍了经典算法ID3算法的理论背景，并按照建树的规则，通过实例使用ID3算法学习得到一棵决策树。

If we plant trees indiscriminately, just as those mediocre historic revival buildings everywhere, we are trivializing them.

到处乱种树，就像那些平庸的仿古建筑一样，只是在榨取树的剩余价值，让树看起来很琐碎，让树变成背景。

Objective To explore blood collection methods for tree shrews and improve the succeed rate of experiment. Methods Total 50 tree shrews were divided into 5 groups(10 in each group).

目的 探讨树鼩的采血方法，提高树鼩实验的成功率方法随机将50只树鼩分五组（每组10只），分别使用不同采血法，比较它们的成功率。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。