优势种

What's more, according to the function, organism study and resource features, it also divides the Pteridophyte resources of this region into 8 types like medicine, appreciation, food, instruction, chemical material, weaving and packaging, fodder and green mature, rare, endangered and precious, and some suggestions on how to exploit and utilize them are put forward as well.

按其用途、生物学习性及资源特点将该区蕨类植物划分为药用、观赏、食用、指示、化工原料、编织、包装、饲料和绿肥及珍稀濒危与珍贵保护蕨类植物8种类型，并提出加大开发力度、推广人工栽培技术、加强资源综合性开发研究，变资源优势为经济优势等建议。

Succeed, and in the course of constant , steady innovation , optimization, circulation upgrading type improves the implementation quality of the regulatory management system, keep and strengthen the operation efficiency of science , high-efficient business administration system; In other words: Or in successful enterprises of some some time in enterprises with competition advantage in the competition, the sum total of its inside system of business management and normal , regular factors included is sure that has the advantage of being stronger;If there is disparity in a certain respect among enterprises, will certainly and including norm , rule ,etc. overall implementing effect have certain disparity with relevant management system in this respect; If the competition in the same product , market field have difference of excellent , inferior position among enterprises, must have disparity in the whole system of business management and normal , regular factor overall behavior way , result of displaying among enterprises .

成功的企业在企业管理制度实施方面具有共同的特点，那就是规范性的管理制度编制或创新（新的企业管理制度编制过程实际就是一种创新的过程）以及规范性管理制度实施的效果等因素较其他企业成功，而且是在不断的、稳定的创新、优化过程中，循环性升级式地提高规范性管理制度的实施质量，保持和增强科学、高效的企业管理制度体系的运转效能；换句话讲：在竞争中拥有竞争优势的企业或在某一段时间成功的企业，其内部的企业管理制度及其所含的规范、规则因素的总合一定也是具有较强的优势；企业间如在某一方面存在差距，一定是与此方面的相关管理制度及其所含规范、规则等的总体实施效果存在一定的差距；企业间如在同一产品、市场领域里的竞争存在优、劣势之分，一定是企业间在整体企业管理制度及其规范、规则因素的总体表现方式、表现效果存在差距。

This new platform, considering the relationship among teaching, learning and managing, solving the conflict of resources share and intelligence prosperity, adopting latest theory on learning and mature technology, has more advantages than the existing platform. Firstly, it integrates the advantages of Internet and Satellite communication system and achieves the seamless connection. Secondly, it adopts the coding technology of streaming media with MEPG-4, which makes it possible that the on-line instruction, the schedular broadcast instruction and the distributed course ware on demand can be broadcast on the two networks. Thirdly, it considers the problems of security, user certification and the protection of intelligence property. Fourthly, it is possible to link education resources from all united university, and is able to share resources for lifelong learning individuals or group.

此次清华大学远程教育播出平台的改造，本着现有平台与未来需求相结合；最新的学习理论与成熟的信息技术相结合；资源传输与对学生的学习支持相结合；教育资源开放与知识产权保护相结合的设计理念，综合考虑了远程教育环境中教、学、管三方面的需求和关系，因而具有多方面的优势：新平台整合了互联网和卫星网各自的优势，在技术上实现了天网与地网的无缝连接；新平台对传输的教育节目采用 MPEG-4编码方式进行流媒体播出，在传输上实现了基于两种网络的实时课堂直播、录播和基于互联网的分布式课件点播的多种需求；新平台集资源加密、用户认证和授权等功能于一体，可有效地保护远程教育中的知识产权；新平台将各联盟学校的教育资源进行整合后重新提供给学习的个体或团体，较好地实现了资源共享。

To my mind a university was a kind of social superiority created and supported by the country with umpteen financial investment.

在我看来，大学试一种社会优势，国家用大量投资维持和创作这种优势。

Because of virtual enterprise can increase agileness by combining a number of enterprises'resources,virtual enterprise has becoming a new organization form of manufacturing enterprise.

一、引 言虚拟企业作为一种新的企业组织形式，可以通过整合若干个优势互补的企业资源，对市场需求作出快速反应，增强竞争优势，迅速占领市场，共同完成某项产品或任务。

The species diversity of Dipentodon sinicus communities in Yushe National Forest Park of Guizhou province was studied based on the quadrate method. The results showed that Rosaceae, Ericaceae, Betulaceae, Fagaceae, Theaceae, Lauraceae, Caprifoliaceae, Cornaceae were the dominant families in D. sinicus communities of Yushe National Forest Park. In the 10 sample plots, there were 8 which were absolutely dominated with D. sinicus population, the importance value came up to 135.69 on average, and it was far higher than the others. For D. sinicus communities, the abundance index (2.847), Simpson index (0.601), Shannon-Wiener index (1.523), probability of inter-specific encounter (0.601) and species evenness (0.569) of the tree layer were lower than those of the shrub layer (5.580, 0.830, 2.377, 0.829, 0.672, respectively) on the whole. It markedly showed a species diversity characteristic of the mixed broadleaved evergreen and deciduous forest in middle subtropics. In the 10 sample plots, the species diversity level of Q1 was the highest, followed by Q3, Q5 and Q6 was the lowest.

摘要运用样方法对贵州省玉舍国家级森林公园稀有保护植物十齿花群落的物种多样性进行了研究，结果表明：玉舍国家级森林公园十齿花群落以蔷薇科、杜鹃花科、壳斗科、桦木科、山茶科、樟科、忍冬科、山茱萸科等为优势科；10个样地中有8个样地以十齿花种群占绝对优势，其平均重要值高达135.69，远远高于其它种群；十齿花群落乔木层物种丰富度为2.847、Simpson指数为0.601、Shannon-Wiener指数为1.523、种间相遇机率为0.601、均匀度指数为0.569，总体上均小于灌木层(分别为：5.580、0.830、2.377、0.829、0.672)，表现为较明显的亚热带常绿落叶阔叶混交林的物种多样性特征。10个样地中，Q1的物种多样性程度最高，Q3次之，Q5和Q6最小，多样性程度最低，10个样地的物种多样性排序为Q1＞Q3＞Q9＞Q7＞Q2＞Q4＞Q10＞Q8＞Q5＞Q6。

Between shrub and herb layers ,the difference of each index was not significant The total richness index and Shannon-Wiener index of Phellodendron amurense plantation community were all the highest than those of the other communities.(2) The total richness index of Machilus pingii- Quercus oxyodon evergreen broad-leaved forest community, Alnus cremastogyne-Betula luminifera-Quercus oxyodon evergreen-deciduous broad-leaved forest community and Rhus potaninii- Juglans sigillata- Quercus oxyodon evergreen-deciduous broad-leaved forest community all exceeded 31 .These communities , the dominance species in their shrub layers is Fargesia rufa ,such as Betula luminifera-Rhus chinensis-Quercus oxyodon evergreen-deciduous broad-leaved forest community, Quercus oxyodon-Litsea pungens-Cornus macrophylla evergreen-deciduous broad-leaved forest community, Cornus macrophylla- Acer caudatum var.

2润楠-曼椆常绿阔叶林、桤木-亮叶桦-曼椆常绿落叶阔叶混交林、青麸杨-野核桃-曼椆常绿落叶阔叶混交林群落的总体丰富度指数均大于31；在灌木层以青川箭竹为主的群落(亮叶桦-盐肤木-曼椆常绿落叶阔叶混交林、曼椆-木姜子-梾木常绿落叶阔叶混交林、梾木-川滇长尾槭-落叶阔叶林、川西樱桃-尾叶樱-川滇长尾槭落叶阔叶林)中，各群落总体丰富度指数和Shannon-Wiener多样性指数较小，总体优势度指数较大；8种次生林群落灌木层丰富度指数均高于乔木层，乔-灌层间丰富度指数差异性检验达显著水平；乔-草层间的丰富度指数差异性检验达极显著水平，Shannon-Wiener多样性指数差异达显著水平；灌-草层间的多样性指数和优势度指数差异性检验均达显著水平。

There were only 94 vascular plant species, belonging to 50 family and 75 genera. The dominant species in the communities were deciduous broadleaf species Liquidambar formosana, Robinia pseudoacacia, Ailanthus altissima, Acer buergerianum, and Celtis sinensis, evergreen broadleaf species Cinnamomum camphora and Elaeocarpus glabripetalus, and Phyllostachys heterocycla. Robinia pseudoacacia+Cinnamomum camphora community had the highest Shannon-Wiener index (1757) and Phyllostachys heterocycla+Acer buergerianum community had the highest Simpson index (0163), but no consistency was observed between the curves of H and D. For vertical structure, most communities had no significant understory stratification.

结果表明：辰山植物区系以泛热带和北温带占优势，具有典型亚热带和温带成分交汇和南北植物分布交错特征；但保育区内种类单一，维管束植物仅有49科69属94种；主要群落是以枫香、刺槐、臭椿、三角枫和朴树等为优势树种的落叶阔叶林，以香樟和秃瓣杜英等为优势树种的常绿阔叶林，以及毛竹林；物种多样性普遍较低，Shannon-Wiener多样性指数最高为刺槐+香樟群落（1.757），Simpson均匀度指数最高值为毛竹+三角枫群落（0.163）；多样性指数曲线和均匀度指数曲线不具有一致性的变化趋势；多数群落垂直结构中无明显林下分层现象；演替前期的落叶乔木种群后续个体不足。

Comparative Advantages theory has made great progress after world war Ⅱand split up into two schools: one is the new essentia lfactor theory , the other is the new technology theory .

二次战后，比较优势理论进一步得到了深化和发展，形成了两个相互平行又相互补充的理论支流：一是新要责贸易理论，一是新技术贸易理论，这两种理论都强调了科学技术、规模经济、产品差异化在比较优势形成中的作用。

According to the performance of grain yield,these 10 QPM inbreeds could be divided into 4 heterotic groups.

根据杂交组合产量性状的配合力分析，可初步将这10个优质蛋白玉米自交系划分为4个杂种优势群和4种杂种优势模式。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。