支持结构

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。

Amberfish is general purpose text retrieval software. It supports nested queries of semi-structured text in XML format and traditional unstructured sea

Amberfish 是一个通用的文本检索软件，它支持xml格式的半结构文本的嵌入式查询以及传统的机构型的搜索。

Ambient Control Space is proposed in ambient networks project to support dynamic, distributed, self-managed and self-maintained management for heterogeneous networks. Through Multi Radio Access architecture, sufficient use of the advantages in multi-access co-existence can provide all users with the best Internet connection services.

Ambient Networks提出了Ambient控制平面来支持动态的、分布式的、自管理和自维护的异构网络管理；通过多无线接入结构充分利用多种接入技术并存带来的优势，为用户提供总是处于最佳连接的服务。

The AMT information system's function,structure,relevant technololgies and development tendency are introduced in this paper.

本文分析了先进维修技术信息支持系统的功能、结构及相关技术，并预测了其发展方向。

The X-ray imaging observation and the localized velocity structure favor such a bound-incoming model that these two clusters, with a true spatial separation of about 6.4Mpc/h, are moving together with a relative velocity of 664 km/s along the direction with a projection angle of 71.5 du.

近来的X-ray成像观测以及局域速度结构支持这样一种束缚塌缩模型：两星系团的真实空间距离约为6.4Mpc/h，其投影角为71.5度，并正以大约664千米每秒的相对速度靠近。

The first phase is todevelop the C/S structure of Job Management System—JC antetype; The second phaseaims to support cluster isomerous system and highly usability; The third phase aims toexplore resource sharing technology on WAN and Interact.

第一阶段是研制客户／服务器体系结构的作业管理系统—JC原型；第二阶段旨在实现集群异构系统支持和高可用性；第三阶段则是在广域网及Internet上探索JC系统的资源共享技术。

In the last, the dissertation analyse the antidumping stability and antiskid stability for caisson quaywall and then calculate their reliability index.

但此结果对板桩结构的可靠度进行更深入的分析，选择一套协调的、可靠度一致性好的分项系数提供了理论支持。

Its technology fetures include adopting plug-in technology and modulized structure to guarantee every component can be upgraded and added/removed alone; implementing 'push' mode backup by self-described data file structure to support light weight backup window and to visit backup client safely; adopting various kinds of standard TCP/IP-based internet agreement to guarantee it's expansibility; adopting XML-based message format to guarantee it's compatibility with previous versions; adopting unified resource management agreement to simplify the management of plug-in package and guarantee opening of functions.

它采用插件化、模块化技术保证各组件的单独升级和增删；采用自描述的数据档案结构实现了"推"备份模式来支持小备份窗口并保证了客户机的访问安全；采用基于TCP/IP之上的各种标准Internet协议来保证软件的可扩展性；采用基于XML的消息格式来保证软件升级换代的兼容性；采用统一的资源管理协议来简化软件插件的管理，保证软件功能的开放性。

By the growth chamber method, the effects of ethylene,kinetin,6-BA and their compound ETH-KT,ETH-6-BA on the morphological features, biochemical composition, endogenous hormones and tissue structure of mung bean seedlings were investigated. In order to provide the support of theory and technology for mung bean sprout production.

采用人工气候箱技术，研究ETH、KT、6-BA及ETH-KT、ETH—6-BA复配处理对绿豆幼苗形态、生化成分、内源激素及下胚轴细胞组织结构的调节效应，为绿豆芽菜的安全生产提供理论和技术支持。

With the high speed of the engine and high compression forces obviously exerting extreme loads on the crankcase, the crankcase is compact and particularly stiff in its bedplate structure, ensuring very exact support of the crankshaft.

随着发动机的高速和高压缩力量明显地施加极端负载的曲轴箱，曲轴箱紧凑，特别是在激烈的台板结构，确保非常准确曲轴的支持。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐