树

The problem of set partitions in combinatorial mathematics is conside-red, and the following three points are emphasized:(1) the non-recursivealgorithm for computing the number of partitions of an N-Set, P;(2)the algorithm for mapping the partition vector V to the partition sequencenumber D;(3) the algorithm for mapping the partition sequence number Dto the partition vector V.

本文对组合数学中的集合划分问题进行了一些探索，试图回答下面三个问题：①集合划分方法数P的非递归算法，②划分向量V映射到划分序号D的算法，③划分序号D映射到划分向量V的算法。本文以划分的构造树为基础，加以变换，得到数目树和分块树，由此求得P，以及K块划分方法数P_K。

Any of numerous palmlike dioecious trees and shrubs of the genus Pandanus of the Old World tropics, having large prop roots and a crown of narrow, spiny leaves that yield a fiber used in weaving mats and similar articles.

露兜树属产于东半球热带地区众多的象棕榈树的露兜树属雌雄异株树和灌木，有大型的支柱根和集生于枝顶的窄而且带刺的叶子，叶纤维可用作织席子和类似的工艺

The diff above shows the differences between the working-tree version of file.txt and the stage 2 and stage 3 versions. So instead of preceding each line by a single "+" or "-", it now uses two columns: the first column is used for differences between the first parent and the working directory copy, and the second for differences between the second parent and the working directory copy.

上 述的输出显示了 file.txt 文件在工作树中的版本对阶段2（stage 2）与阶段3（stage 3）中的差异，并且在每行中加上"+"或者"-"的前缀，分两列排列：第一列用于标记第一个父交付对工作树的差异，第二列用于表示第一个父交付对工作树的差异。

A tree whose hungry mouth is prest against the earth's sweet flowing breast; A tree that looks at God all day, And lifts her leafy arms to pray; A tree that may in summer wear A nest of robins in her hair; Upon whose bosom snow has lain; Who intimately lives with the rain.

一棵张着饥饿嘴巴的树，紧压在大地甘美而流畅的乳房上；一棵整天望着神的树，举起枝叶繁茂的手臂来祈祷；一棵树在夏日里可能戴着一窝知更鸟在头发上；雪花堆积在她的怀抱里；雨水也和她亲切地生活在一起。

A tree whose hungry mouth is prest Against the earth抯 sweet flowing breast; A tree that looks at God all day, And lifts her leafy arms to pray; A tree that may in summer wear A nest of robins in her hair; Upon whose bosom snow has lain; Who intimately lives with rain.

一棵树将她饥渴的口腔紧贴大地温情畅流的胸膛；一棵树整天爷望着上帝，举着她祈祷状的多叶手臂；一棵树也许在夏季戴上一个知更饭鸟巢在她的发丛里；皑雪曾落在她怀抱里，她和雨相处亲密。

In the paper, the importance of FTA is described, the quantitative analysis method of the FTA is introduced in detail. Then the paper takes a vehicle control system as the research object, expatiates the forming of the CPU board fault tree, the establishing of the mean event fault tree and the obtaining of the mean event fault probability, and realizes the element level fault orientation on the CPU board of the vehicle control system. The test indicates that the method is both valid and correct.

文章在介绍故障树分析法重要性的基础上，较详细地介绍了FTA的定量分析法，并以某车辆控制系统为研究对象，从CPU板故障树的构建、各中间事件故障树的建立和各子事件故障概率等方面出发，实现了车辆控制系统CPU板元件级的故障定位，实验表明了该方法的有效性和正确性。

According to the characteristics of the Kernel-Tree network, this paper proposes a new WH seamless roaming solution, which combines the IEEE802.11 protocol and the KTRP protocol, in the multihop Ad hoc network based on TCP/IP protocol stacks. The solution includes the virtual address technology, the proxy ARP in multihop Ad hoc, and the fast route-convergence technology in KTRP protocol. And its implementation for Linux is also discussed in this paper.

本文根据"核心树网络"的特点，结合IEEE802.11协议和核心树路由算法，提出"虚拟地址"技术，无线多跳网络代理ARP协议，核心树中快速路由收敛技术来共同完成基于TCP/IP协议簇的无线多跳网络中"无缝漫游"的设计方案；并讨论了在Linux操作系统下方案的具体实现。

By the pine-wood; nowhere was there the white gleam of a church, nor bright stretches of meadow--it was all trees and trees, everywhere the ragged edge of the tree-tops, and a delicate dim mist, the eternal mist of the forest, hung over them in the distance.

带青色的团团枞树林在我面前铺展成长长的连续的棱纹，到处是片片绿色的小桦树灌木林；整个天际都被松木拥抱了；全没有教堂白色的微光，也没有草地明亮的伸展--除了树还是树，每个地方都是树顶的不平的边缘，和远处树林之上挂着的朦胧雾霭，森林永恒的雾霭。

In the ER-Tree, the efficiency of retrieval could be improved by the ways of partition of the vector space with hyper-sphere and R*-Tree s re-insert technology introduced to enhance ER-Tree s capability to represent the data-sets'features.

该索引树用超球体划分多维向量空间，以有利于计算最近邻；吸取R*-Tree树的重插技术，以增强索引树对数据集整体特征的表达能力，从而提高检索效率；通过引入插入安全点和删除安全点概念，有效地提高建树的效率。

After the death of their parents, three brothers wanted to break up the family and live apart. In the very act of being sawn into three segments, the redbud tree withered all of a sudden. On seeing this, three brothers woke up to their error and decided not to break up the family again, which made the redbud tree came to life again like a miracle.

传说，古代有一田性人家，父母双亡后兄弟三人闹分家，钱财、房屋分光只剩下一颗紫荆权，正欲将树砍下锯为三段，树突然枯死，兄弟三人幡然醒悟，决定不再分家，紫荆树又奇迹般复活。

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。