查询词典 characteristic series

From the point of view of geobotany, with the method of correlative factors of growth of plants, a countrywide theoretic ecological division was done for the introduction of Camptotheca acuminata and three kinds of areas of ecological preferent zone, ecological adaptive zone and ecological unadaptable zone were divided. With the theory of synecology, the characteristic on environment, constitution, life form spectrum, diversity, similarity of plots of communities were researched. Applying the method of species association, discrete distribution, indensity index, fractal geometry, etc. to research relations between the species of the communities, space distribution of Camptotheca acuminata, structure of age of Camptotheca acuminata, in different communities. Using the theories of autoecology, distibutons of seeds on land and growth of seedlings in vertical and horizontal directions, biomass of organ of Camptotheca acuminata were analyzed. On the opinions of conservation biology, the external and internal factors impressing Camptotheca acuminata were analyzed to research the mechanism of the endangered species, and with using of CTM Model, the future development direction of Camptotheca acuminata in different communities were forecasted, and. Standing on the position of resources ecology, discussing the regularity of camptothein in Camptotheca acuminata of different sites and seeding of different resources, also the the derive technics of camptothecin.

本文从地植物学的角度，运用植物生长相关因子法，对我国喜树资源的生态适宜区进行了划分，理论上确定了我国的喜树的引种栽培的最适生活区域、生态适宜区域和不适宜生活区域；从群落生态学的角度，对野生喜树所在的典型群落的群落环境、群落组成、群落生活型谱、群落的物种多样性特点、群落样地间相似性进行了研究；从种群生态学的角度，运用种间联结性、离散分布模型、聚集强度指数、分析几何等分析手段，对野生喜树所在典型群落间的种间关系、喜树的空间分布格局、年龄结构等进行了分析；从个体生态学的角度，对不同年龄组的喜树的种子的散落的垂直分布、水平分布、时间分布及种子发芽率和千里重等特点、不同种源的人工喜树苗期特点、喜树的高生长和茎生长特点、喜树的器官生物量特点进行了研究；从保护生物学的角度，对野生喜树的濒危的内部因素和外部因素进行了探讨，并运用CTM模型对不同群落中野生喜树的种群趋势进行了预测；从资源生态学的角度，对我国地理环境下喜树中喜树碱含量的地理分布规律、不同种源的喜树幼苗中喜树碱含量变化规律进行了研究，并对喜树碱的提取工艺进行了探讨。

In the 1930s, the Russian geochemist/biologist Vernadsky wrote,"The property of maximum expansion is inherent to living matter in the same manner as it is characteristic of heat to transfer from more heated to less heated bodies, of a soluble substance to dissolve in a solvent, and of a gas to dissipate in space."

1930年代，俄罗斯地理化学/生物学家沃尔纳德斯基写道："最大化扩张的属性是活物与生俱来的，就如同热之从温度较高的物体传到温度较低的物体，可溶性物质之溶入溶剂，以及气体之消散入天空。"

In sediments of these areas, the distribution and geochemistry characteristic of heavy metals are influenced directly by depositional environment.

在这些海域的沉积物中，重金属元素的分布特征及地球化学行为与区域内的沉积环境密切相关。

At the same time, it preserved the characteristic feature of microprocessors AMD geode : theextremely low energy consumption.

在此同时，它的特征保存中央处理器热潮大地：能耗极低。

According to the characteristic of geodesic, tool path are offset.

但是数控编程技术的滞后严重阻碍了五轴机床效率的发挥。

Variety is a key characteristic of the United States, both geographically and culturally.

地理和文学的多样化是美国最重要的特色。

On the basis of analyzing the geometry characteristic of geologic section, the data model of section is built.

在分析地质剖面图的几何特征的基础上，建立了地质剖面图的数据模型。

To seek a new-style autonomous navigation method based on the characteristic of geomagnetic field.

利用地磁场的特性来寻找一种新型的自主导航方法。

In the development of digital contents of mathematics, it is mainly to adopt the concepts of iteration and vision to combine dynamic geometry software GSP (The Geometer's Sketchpad) with its characteristic of dynamics, to use the concepts of iteration, specialization and generalization to develop digital contents of mathematics.

在数位内容的研发方面，主要是以递回及视觉化的概念，在动态几何软体GSP The Geometer's Sketchpad ）上，结合其动态呈现的特性，运用「递回」、及「特殊化与一般化」的概念，研发数学数位内容。

We carry out the research on the characteristic property of geometric distribution.

1研究了几何分布的特征性质，首次提出统计封闭性和统计贴近性的概念。

In the days of sailing vessels the crew were afraid they would be becalmed on the ocean.

在使用帆船的时代，船员们担心他们会因为无风而无法在海洋上航行。

As long as foreign donors pay the PA's salary bill, few expect a new intifada.

只要外国继续为巴权力机构的薪水买单，希望发动新暴动的人便寥寥无几。