树

In this paper we proposed an improved method which changes the definition of the 4-neighborhood model. we call it side neighborhood minimum absolute weight prediction tree technique. lt can simplify the algorithm and improve the results of lossless compression.

本文对预测树方法进行改进，提出一种侧邻域最小绝对权值预测树方法，通过改变预测树的四邻域定义，使构造预测树的算法简化，并且，实验结果表明，对不同类型的多光谱遥感图像，SNMAW的压缩效果与MAW的压缩效果相近或有所改善。

During the postgenomics era the information about genomic sequence and gene functions provides a new foundation for evolutionary biology and ecology As the first whole-genome sequenced plant Arabidopsis thaliana and its wild relatives have played a critical role in understanding the evolution of genomics and speciation Both A halleri and A lyrata are closely related to the model species A thaliana A halleri ssp gemmifera occurs in northeastern China Japan and Taiwan; while its sister A halleri ssp halleri is mainly distributed in Europe Geographical barriers such as Tienshan Mountain Range isolate these intraspecific sisters Likewise A lyrata ssp kamchatica and ssp lyrata occur in East Asia and North America respectively Such distribution patterns seem to be consistent with allopartic speciation The comparison between ancestral and extant polymorphism by multilocus can be informative about the population genetics of speciation In this study we collected and analyzed DNA sequences of 98 genes from four wild relatives of A thaliana A halleri ssp gemmifera A halleri ssp halleri A lyrata ssp kamchatica and A lyrata ssp lyrata The ancestral states of these four species were compared to each other in terms of level of genetic variation However the ancestral species at the time of speciation were substantially more polymorphic than the extant geographical populations The observations are not fully compatible with speciation by strict allopatry At some species pairs parapatric speciation seems more reasonable in speciation of Arabidopsis The 98 gene sequences are also used for the congruence test between gene genealogy and species phylogeny Only 28 genes support the species phylogeny but there are 23 genes supports another major genealogy { lyrata} thaliana Based on the phylogenetic position change of A lyrata ssp kamchatica and Ks value for each species pair suggested the recent directional gene flow between A halleri ssp gemmifera and A lyrata ssp kamchatica

阿拉伯芥是第一个完成基因体定序的开花植物，其基因体资讯提供植物学研究的重要依据；在解析阿拉伯芥属物种的亲缘关系以及种化机制等重要的演化议题时，阿拉伯芥近缘的野生物种自然成了不可或缺的关键；跟阿拉伯芥近缘的物种包括A halleri及A lyrata，其中A halleri ssp gemmifera主要分布於中国东北、日本以及台湾，与近缘的A halleri ssp halleri其分布於欧洲隔著天山及大陆的障蔽，而A lyrata ssp kamchatica主要分布於东北亚及台湾，与分布於北美五大湖的A lyrata ssp lyrata被北极圈所分隔，这样的分布模式暗示异域种化的可能。藉由多基因分析比较祖先物种与现生物种遗传歧异度的相关可提供讯息探讨种化时期的族群遗传结构，本研究针对A halleri ssp gemmifera、A halleri ssp halleri及A lyrata ssp kamchatica、A lyrata ssp lyrata四个物种，两对互为亚种的姊妹群，以阿拉伯芥为外群进行研究，在四个物种完成98个同源基因的分子序列，利用套装软体MCMCcoal来估算祖先物种的遗传变异，亦估算现生物种的核苷酸歧异度，观察到？多物种配对中祖先物种遗传多型性大於现生物种DNA歧异度，显示异域种化模型并无法完全解释阿拉伯芥属物种的种化模式，在某些物种配对间邻域种化模式应比异域种化更为可能；在基因树与物种树的比较，98个基因片段的亲缘模式只有28个是与已知物种树一致的，有23个基因其树状图支持{ lyrata} thaliana的型式，藉由kamchatica位置的变化以及估算各物种配对间的平均同义置换率，推测在A halleri ssp gemmifera与A lyrata ssp kamchatica间具有近代的单方向基因交流。

Our main products : Super Christmas trees, PVC Christmas tree, Christmas anadem, Christmas decorating cane, Pine needle tree, Christmas garland, Pine needle bar, and Super luxury Christmas tree, Appending Christmas tree, Decoration tree, Christmas tree with lights, Pine needle Christmas tree, and Plant tree with soft nap.

万绿工艺制品厂生产产品有：大型超级圣诞树， PVC 圣诞树，圣诞花环，圣诞装饰藤条，松针树，圣诞花圈，松圈，松针条，超豪华圣诞树，悬挂圣诞树，饰品树，圣诞带灯树，松针圣诞树，植绒树。

Our results showed that the total dendrite branch length and arborization of hippocampal neuron were not affected by the inhibition of ASICs for a short time, while the total dendrite branch length was reduced and dendrite development was impaired if ASICs were inhibited for a long time.It suggested that ASICs play a role in the dendrite development,which may help understand how ASICs affect the formation of neuronal networks and participate in higher brain fuctions such as learning and memory.

结果发现短时间抑制ASICs的功能并不影响海马神经元的树突总长度和分支，而长时间抑制ASICs的功能则会降低树突总长度，影响树突的发育，表明ASICs参与调节树突的发育，这将有助于理解酸敏感离子通道如何影响神经网络的形成，并进而参与学习记忆等高级脑功能。

During the study, researchers recorded the width of the tree rings of balsam firs. Each ring marked a year of the tree's growth. A narrow ring indicated that the tree's growth had been suppressed that year. The narrow rings appeared only after wolf populations decreased, allowing a greater number of moose to survive and eat more balsam firs.

研究期间，研究人员记录了香脂冷杉树轮的密度，一个树轮表示树生长了一年，有一圈年轮显示出树木在那一年的生长受到了阻碍，根据树的年轮推断出现阻碍的这一年，正是狼群数量减少，鹿的数量大量繁殖的那一年，鹿比平常吃了更多香脂冷杉。

The author suggests that, besides the sorcerers emp owered by the gods to revive the dead, medicine made from the life tree can also achieve immortality; many life trees in the Chinese mythology are in fact split from the jian mu yi shu; the space mode and the time of the universe as well as the Xi Wang Mu and the life-death contradiction, moreover, ca n all find their unity in the life tree.

从这段经文及其他文献，我们可以知道：在中国古代萨满教观念里，有连接天地或神人的天梯山（灵山、巫山、云雨山、登葆山、昆仑山）和天梯树，巫正是从天梯上下于天人之间、通于神人之际的。但是，巫在天梯的&升降&除了下宣神旨、上达民情外，还包括采摘不死药，以使人死而复生。不死药应该来自天梯树的花果，从而作为宇宙树的天梯树也成了生命树。

Traditional page clustering algorithm based on DOM tree edit distance is not suitable for the complex Document Object Model tree structure pages created from dynamic templates. In this paper, an improved Web page clustering algorithm was proposed based on partial tag tree matching. In the proposed algorithm, the appropriate weights were assigned to the nodes according to their effects on the layout of Web pages and the level difference between template nodes and non-template nodes.

传统的基于DOM树编辑距离的网页聚类算法不适合文档对象模型树结构复杂的动态模板网页，提出了一种基于局部标签树匹配的改进网页聚类算法，利用标签树中模板节点和非模板节点的层次差异性，根据节点对布局影响的大小赋予节点不同的匹配权值，使用局部树匹配完成对网页结构相似性的有效计算。

This paper first gives an introduction to the AVL tree.Then the paper analyses the definition,properties and main operations of red-black trees.At last, this paper implements the operations of red-black trees in C,and compares the search time of binary search trees and red-black trees.

本文首先介绍了AVL树的定义及其主要操作，然后重点分析了红黑树的定义，特性和它的主要操作，并用C语言实现了红黑树的操作，对二叉查找树和红黑树的查找时间进行了实验对比。

This thesis discusses firstly the IGMP, describes the specification of the protocol and explains the differences between the three different versions of protocol. Then the RPF rule used by the router to forward multicast packets and the multicast forwarding tree are discussed. The process of building SPT and RPT is also illustrated. In this thesis, we also discuss the mechanism of Flooding and Pruning in Dense-Mode multicast routing protocol and the process of switch from RPT to SPT in Sparse-Mode routing protocol.

本论文讨论了实现IP组播的IGMP协议，对IGMP协议的协议规范进行了描述，并对IGMP三个版本的不同点作了详细说明；讨论了进行组播数据包进行转发的RPF基本原理、组播转发树的类型，并对SPT树和RPT树的建立过程进行了探讨；并分别对密集模式组播路由协议的扩散和剪枝机制、稀疏模式组播路由协议中的RPT树到SPT树的切换过程进行了详细的探讨。

On this basis,thelocally finite tree set is defined,and the locally finite tree martingales are defined interms of the locally finite tree set,and then a tree martingale decomposition theoremis obtained by the locally finite tree martingales.

基于这个分解，证明了树鞅指标集同构于一个有向森林，这个森林中的每一棵树都是有向局部有限树，这就证明了树鞅指标集有一个分解，它的每一部分同构于一个有向无限、局部有限树。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了