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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。

The formation and evolution of the graben includes initial fault depression,main fault depression and renew action three stages.

地堑在形成过程中,由于边界断裂的限制造成应力不均匀分布,导致地堑内部东西差异沉降和南北隆凹相间,沉降中心和沉积中心随着断裂活动期次的不同而发生迁移。

What of architectural beauty I now see, I know has gradually grown from within outward, out of the necessities and character of the indweller, who is the only builder -- out of some unconscious truthfulness, and nobleness, without ever a thought for the appearance and whatever additional beauty of this kind is destined to be produced will be preceded by a like unconscious beauty of life.

我现在所看到的建筑学的美,我了解它是从内部向外面渐渐地生长出来的,是从那住在里面的人的需要和他的性格中生长出来的,住在里面的人是唯一的建筑师,——美来自他的不知不觉的真实感和崇高心灵,至于外表他一点儿没有想到;这样的美如果必然产生的话,那他先已不知不觉地有了生命之美。

Do you want to wait to find out that you need to take better care of your insides with this kind of warning shot?

你是否想迫不及待地找出你需要更好地照顾你的内部有了这种预警开枪?

In the routine of the library, the work of using students to participate in the service of the library , managing , propagating etc, not only has promoted the deepening development that the reform of the library worked , has improved the inside environment of the library, to improving the service quality of the library , utilize existing information resources to all have very great facilitation to the maximum extent, and give full play to the education function of the library , temper students' managerial ability , ability to organize and link up ability , have improved students' quality and training.

在图书馆的日常工作中,适度地使用学生参与图书馆的服务、管理、宣传等工作,不但促进了图书馆改革工作的深入发展,改善图书馆的内部环境,对提高图书馆的服务质量,最大限度地利用现有信息资源都有很大的促进作用,而且充分发挥图书馆的教育职能,锻炼了学生的管理能力、组织能力和沟通能力,提高了学生的素质和修养。

To effectively implement the internal fault simulation, the magnetic axis locations of fault parts are arranged appropriately.

为准确地仿真内部故障时地情形,计算了各个故障分支磁轴的正方向。

Because all sorts of elements such as church law and lay law are right at that time the interest of commercial development and businessman is adverse, then mercantile estate is initiative first after that the trade activity standard that self-conscious activate develops interior --, mercantile law, it is law through struggle and rising.

由于当时教会法和世俗法等各种因素对商业的发展和商人的利益不利,于是商人阶层先是自发地而后自觉地创设并发展内部的贸易活动准则———商人法,经过斗争而上升为法律。

This project studies the scale-dependent deformation behavior of the metal matrix composite, the void nucleation and void growth mechanisms at the micron/submicron scale. The main results are:(1) In prophase, growth and coalescence of the void embedded in the graded matrix are analyzed in detailed;(2) Based on the infinite solid model containing a micro-void, coupling effects of the void shape and the void size on the void growth are studied carefully, the results show that it seems to exist a critical equivalent void radius, which is associated with the material length. When radius of a microvoid is close to or smaller than the critical void radius, the micro-void growth rate is essentially eliminated;(3) The coupling effects of the particle shape and size on the mesoscopic stress fields within the particle and matrix are also investigated by introducing the conception of inclusion/matrix interfacial energy. The results show that the stress concentration factors within the particle and on the matrix/particle interface are also strongly size-dependent,so the void nucleation mechanism is size-dependent.(4) By employing a specific orthogonal curve coordinate frame and a 'kernel function' conception, a 'unified method'solving the spheriodal and spherical void problems is suggested; by this unified method, size-dependent plastic potentials of the porous materials containing the spheriodal or spherical voids are obtained, which extend the traditional Gurson model for the spherical void and GLD model for the spheriodal voids to the micron scale.(5) Based on the RVE model containing the spheriodal or spherical particles, the influences of the particle shape and size on the size-dependent mechanical behavior of metal matrix composite are studied.

中文摘要:本项目对金属基复合材料在微细观尺度下的尺度相关变形行为、孔洞形核及长大的机理和模型进行了研究,取得了如下主要结果:1)在前期研究中,探讨了基体的梯度分布对孔洞长大和聚合的影响;2)基于含孔洞的无限大体模型,探讨了孔洞形状和孔洞尺寸对其长大的耦合作用,结果表明:可能存在一个与材料特征长度相关的临界孔洞尺寸,当椭球孔洞的等效半径小于临界孔洞半径时,孔洞的长大受到明显抑制;3)通过引入基体/夹杂界面能的概念,分析了夹杂尺寸、夹杂形状对材料细观应力场的耦合影响,结果表明:颗粒内部和界面上的应力集中因子强烈地依赖于夹杂的尺寸和形状,因此,孔洞的形核机理是尺寸相关的;4)采用一种特殊的正交曲线坐标系和引入"核函数"的概念,"统一"地得到了含椭球和球形孔洞的材料的尺寸相关塑性势,它将传统的Gurson球形孔洞模型和GLD椭球孔洞模型推广到微尺度范围;5)基于含椭球和球形夹杂的体胞模型,初步研究了夹杂形状、夹杂尺寸对金属基复合材料尺寸相关力学行为的影响。

Wavelet multi-scale analysis is applied to the research on lunar gravity field and the explanation of lunar inner structure. In this paper, the nearside of the Moon with higher quality data is chosen as the test area, and free air gravity data from "Clementine" mission are used as original data to decompose gravity of some specific mare basins. With the results of numerical test, we also explain the hierarchical structure of the Moon, analyze the thickness of mare fillings and the Moho topography under mare basins, and verify the results by comparisons.

本文将小波多尺度分析引入月球重力场的研究,选取测量数据质量较好的月球近区作为实验区域,以"Clementine"探测器获得的自由空气重力异常作为原始数据对主要月海盆地进行了局部的重力异常分解,解释了月球内部基本分层结构,并利用主要月海盆地的实验结果分析了月海下部质量异常以及莫霍面的起伏形态,与已有研究成果进行比较证明了方法的适用性及结果的合理性。

Using the world's most exacting equipment, Nilsson reveals the interior form of the entire human body and its intricate workings as never seen before, in a book that is as stunning to behold as its contents.

使用世界的最苛求的仪器, Nilsson 显示那内部形式的同样地从不以前见到的整个人类的身体和它的复杂工作,在一本同样地是足以使人晕倒看到如它的内容书中。

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推荐网络例句

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面,更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?