查询词典 diversity factor

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。

4Relation between siol microbial diversity and enviromental facters There is a moderate relationship between Soil microbial diversity and organic matter;and a week relationship between soil microbial diversity and soil moisture.

4土壤微生物多样性与环境因子的关系土壤微生物多样性与土壤有机质之间存在中度相关关系；与水分之间的关系表现为弱的相关关系，与植物群落呈负的弱相关。

The diversity of LH08 station was the lowest, and the diversity difference of every station was significant. The analysis on species diversity index and advantage curve showed that community structure of zoobenthos on every station was less effected, indicating that the sea area was on mild artificial disturbance status.

位于港池的LH08站多样性最低，各站位的多样性差异显著；物种多样性指数和K-优势曲线的分析显示，各站位的底栖动物群落结构没有受到较大影响，表明该海域处于轻度人为扰动的状态。

Shannon-Wiener diversity index, Simpson diversity index and evenness index all show similar trend of change. The diversity indexes and evenness index of zoobenthos in rice-duck farming ecosystems are higher than those in normal paddy during the early stage of rice growth, but are in the reverse trend during the later stage.

水稻各生育时期常规稻田和稻鸭共作稻田底栖动物的Shannon-Wiener多样性指数、Simpson多样性指数和Pielou均匀度指数变化趋势相似，均为水稻生育前期稻鸭共作稻田的生物多样性指数和均匀度指数高于常规稻田，而后期低于常规稻田。

From the result it can be proved that the gain of transmit diversity is identical with receive diversity, and the gain of the diversity is profitable to the performance of the system Fourthly, Turbo codes and BLAST coeds is studied whit emphasis.

通过对其的研究进一步详细探讨了多输入多输出天线系统的空时编码算法的原理，以及发射分集和接收分集对提高系统性能的贡献，证明了发射分集增益和接收分集增益的等效性；第四，研究了Turbo 码和BLAST 编码。

But the idea that the elements of instability are the root of diversity runs counter to one of the hoariest dictums of environmentalism: that stability begets diversity, and diversity begets stability.

不稳定的自然力量是多样性产生的根源，这种想法与一条古老的环境决定论格言背道而驰：即稳定性产生多样性，多样性又带来稳定性。

But the idea that the elements of instability are the root of diversity runs counter to one of the hoariest dictums of environmentalism: that stability begets diversity, and diversity begets stability.

不稳定的元素是多样化的根源，这种想法与一条古老的环境学格言背道而驰：即稳定产生多样化，多样化产生稳定。

Hereby,the research tries to construct a macro frame of agriculture insurance development by the planning of law status ,organization system,governmentail subsidy manner,reinsurance system and disaster risk fund;hereon,a regional diversity strategy on the development of Chinese agriculture insurance is put forward after the regional diversity design for supervision mode,management dealing,insurance policy and other aspects. It probes into the sity-four-dollar question—the diversity of regional subsidy standard,mainly from the rate division of agriculture insurance and regional difference amont farmer's payment ability. Finally,the objective mode is established for developing political agriculture insurance at different regions.

据此，本研究探讨设计了中国农业保险的法律地位、组织体系、政策补贴方式、再保险制度和巨灾风险基金制度，并尝试构建了农业保险发展的宏观框架；在此基础上，提出了中国农业保险发展的区域差异化策略，分别从监管模式、经营行为、保险政策等方面进行了区域差异化设计，并重点从农民支付能力的区域差距和农业保险费率分区两个方面，探讨了区域农业保险差异化发展的关键问题——区域补贴标准的差异化，进而探索设计了各区域政策性农业保险发展的目标模式。

D. Applications, characteristics, sizing and selection of different types of cables/overload lines with due considerations to load factor, diversity factor, power factor, voltage drop and maximum demand of the installation.

各种电缆/架空电缆的应用、特性、尺寸定位和选择，必须适当考虑有关负载系数、不等率、功率因数、电压降及装置的最大需求量等因数。

Based on the statistics characteristics of channel diversity factor, from the point of a new view, for traditional channel diversity technologies a new performance research method is proposed, theory analysis and simulation results testified the validity of the new method.

本文基于信道分集因子统计特性从一个新的角度对信道分集进行了研究，针对传统信道分集技术提出了一种新的信道分集性能研究方法，理论分析及仿真结果表明方法是有效的。

So it was last week in Selma , alabama.

上星期在亚拉巴马州塞尔马市发生的事件也是这样一个转折点。

The group also spearheads various social programs in China.

该组织还带头参与中国的各种社会活动。