The paper concluded that it was helpful to enhance the efficiency of monitoring the changes of the land types using the modern land information technology , and a lot of factors must be considered in the process of the land reclamation , such as the technology , planning , the foundation and to establish a successive mineral environment 研究结果:以山西省平朔安太堡露天矿为例,采用不同的标准划分了不同的土地类型,提出了露天矿不同土地分类标准之间的联系及破坏分类标准下土地类型的动态变化过程,通过土地类型的单一土地利用动态度及转移总量变化矩阵来分析矿区土地类型的数量变化,突出了土地类型之间的时空演变规律并反映了露天矿区土地类型演变迅速、破环剧烈的特点。
The study shows that the early and late seed rains of constructive tree species in evergreen broadleaved forest at chongqing simian mountain had no activity . the bigger the seeds of the species and the earlier or later the seeds of the species matured , the higher the proportion of the seed rain damaged by animals . the quantitative variation of seed rain , active seed rain and seed bank did not take place at the same time . at early time , the number of seed banks of castanopsis fargesii , lithocarpus glabra , quercus myrsinrefolia , castanopsis plasyacantha , cinamomum subavenium . which own more active seed rain increased by geomitric series . the seed banks of castanopsis orthacantha and schima argentea were small , only survived a short time , and did not sprout next year . the quantitative dynamics of seed banks and their increasing or decreasing rates were decided by the proportion damaged by animals , dying speed of seeds and their resistance to pathogens and adverse circumstances , and the state of seed germination 对重庆四面山常绿阔叶林建群种种子雨、种子库的研究表明,建群种早期和晚期的种子雨无活力;种子偏早或偏晚成熟及大籽粒的树种,其种子雨被取食的比例大;种子雨、有活力种子雨、种子库三者的数量变化不一致;有活力种子雨量较大的栲、石栎、小叶青冈、扁刺栲、香桂等,其种子库密度在早期以近几何级数的方式增长,元江栲、银木荷种子库小,存在时间短,翌年无一年生萌发苗;种子库数量动态、消减率动态决定于种子被取食的强度、种子衰老的速度以及种子对病菌、逆境的抗性和种子萌发的整齐性
In this thesis , we study the basic structure , principle , realization , characteristic and the main application fields . to deal with overload problems aroused by the variety of input data rate , we discuss the method of constructing load management system , further more study particularly the key technology of load - balancing , load - shedding and data summary 论文讨论了数据流系统的基本结构、工作原理、实现方法、特点以及其主要应用领域,针对由单位时间内输入系统的数据单元数量变化引起的处理器过载问题,探讨了负载管理系统模型的构建方法,并对负载平衡、 load - shedding 、摘要生成等关键技术进行了深入研究。
X2 test with 2 2 contingency table and ochiai indices were used to analyze the interspecific association of 12 dominant species of meadow community and 20 dominant species of scrub community and 18 dominant species of tree community . pearson ' s correlation coefficient and spearman ' s rank correlation coefficient were also applied to calculate correlations between species 在该地区植被的优势种的种间关系的研究方面,运用2 2列联表、 x ~ 2检验方法对群落优势种进行总体相关性和种对间的联结性检验,利用共同出现百分率jaccord指数测定种对间的关联度,应用pearson相关系数和spearman秩相关系数刻画种对间的数量变化关系。
A 24 hours continuous research of shinisaurus crocodilurus ' s movement . we add up the shinisaurus crocodilurus ' s outing activities according to different time of a day . we also add up the influence of different seasons and climate on the number of shinisaurus crocodilurus ahl . 每天24小时连续观察鳄蜥的活动情况,统计一天中不同时间内出洞外活动的鳄蜥数量以及不同季节、气候条件下的数量变化,以观察到的不同时间内活动个体的多少来表示鳄蜥的活动节律变化。
This paper illustrates the differences in faculty , tuition , funding , enrollment number , models of education and staff recruitment and careers in both university and non - university higher education in flanders , belgium , and analyzes their differences and the development of each 摘要详细阐述了比利时弗拉芒区大学和大专近年来的学生数量变化情况、高等教育的学费和资助情况、教学模式以及专科院校中师资队伍建设情况,分析了大学和专科院校间的差别和比利时弗拉芒区高等教育的发展。
Abstract : through the survey of master degree theses on landscape architecture from peking university , beijing forestry university , chongqing university , southeast university , south china agricultural university , huazhong university of science and technology , nanjing forestry university , tianjin university , tongji university , and china agricultural university from 1996 to 2006 , the analysis in width and depth is made on the aspects like the quantity changes , research areas and directions , research features and existing problems of master degree theses , so as to analyze and summarize the academic research development lines of landscape architecture in china in recent 10 years , and explore the development trend of future academic research of landscape architecture 摘要:通过对北京大学、北京林业大学、重庆大学、东南大学、华南农业大学、华中科技大学、南京林业大学、天津大学、同济大学、中国农业大学10所院校1996 ? 2006年来风景园林硕士学位论文的统计分类,从广度和深度两方面分析硕士学位论文的写作数量变化、研究领域与方向、研究特征、存在问题等多方面内容,以期分析总结近10余年来中国风景园林学科学术研究的发展脉络,从而探寻未来中国风景园林学科学术研究的发展趋势。
Conclusion : l . cgrp and 5 - ht positive cells changed with the development of the lung and this result suggests that these cells play a important role in the development , differentiation and maturity of the lung . the rapid changes in number during the period of birth may relate with the sharp change in founction of the lung 肺内cgrp和5打t阳性细胞的随龄变化显示其在肺的发育、分化、成熟的变化过程中具有重要作用;出生前后其数量变化明显的现象,可能与此阶段肺功能的急剧改变有关; 2
Based on the color aerial photo and the field survey data , this paper analyze the information of various land use type change and spatial characteristics in yanan ecological construction demonstration area from 2000 to 2003 by rs , gis and statistics methods 摘要以航片等资料为基础,借助遥感影像解译、地理信息系统空间分析功能以及数理统计方法,分析了延安生态建设示范区2000 - 2003年间各土地利用类型的数量变化和空间特征,并且首次引入退耕指数、退耕弹性系数等指标对退耕还林工作进行评价。
The conodont fauna of late permian to early triassic from yangou section in leping area , jiangxi province was discussed in this paper . all of the conodont individuals founded in this section were listed in a figure . according to the distribution of the important conodont elements , this section was divided into three conodont zones from the upper permian to the lower triassic 讨论了赣中乐平地区沿沟剖面上二叠统至下三叠统地层的牙形石动物群,列出了牙形石的各个形态属种在地层中的分布及其数量变化。根据特征牙形石分子的地层分布,将该段地层自下而上划分为3个牙形石带,分别是: