研究

The historical process of transition between cultivation and pasture animal husbandry and its ecological impact has been analyzed by demonstration to explore the large-scale laws.(2). The driving process has been analyzed and behavior mechanism of local people was also construed.(3) The new interpretation of desertification causes has been made to search root of estrepement, overgrazing and excessive firewood gathering.(4) The comparison and selection have been made to explore new changing direction of integrated land desertification control strategy.

主要进行了：①农、牧业变化的历史轨迹与生态环境演变的实证研究，从大的历史尺度寻求农、牧业变化与沙漠化之间的互动关系；②农、牧业选择变化的驱动过程研究，从较短的时间尺度进行高分辨率的过程跟踪与解析，重点分析农牧民的行为机制；③农、牧业选择变化对沙漠化过程的动因解析研究，重点解析&滥垦、滥牧、滥樵&产生的深层次根源，为沙漠化防治战略的制定提供理论依据；④生态建设策略的比较与转型方向的研究。

ABSTRACT This dissertation, based on the theories of geography, ecology, economics, sociology and environmental sciences, has analyzed the impact of transition between cultivation and pasture animal husbandry on the mechanism of desertification in Kerqin Sandy Region, of which behavior mechanism of local people was emphasized. The changing direction of integrated land desertification control strategy in semi-arid regions was discussed after having explored the primary reasons of estrepement, overgrazing and excessive firewood gathering. Followings are the main research works having been done.

本文选取科尔沁沙地作为研究区域，以两种最主要的土地利用方式、也是两种最主要的生产方式——农、牧业作为研究对象，依据地理学、生态学、经济学、社会学与环境科学的基本理论与方法，基于现有研究资料的系统整合，结合野外调查的结果，从更加综合的角度，来研究农、牧业选择变化对沙漠化过程的影响机理，从农、牧业选择变化的角度来揭示&滥垦、滥牧、滥樵&的本质，进而寻求中国北方半干旱地区生态环境综合整治的对策。

The purpose of this study is using ethnobotanical methods and approaches to document the medicinal plant resources used by the local Lahu healers and the characteristics of Lahu traditional medicinal knowledge.

本项研究的目的是采用民族植物学的研究思路和方法，以金平者米拉祜族自治乡的拉祜族民间草医为定点研究对象，对当地拉祜族民间草医常用药用植物及其相关的医药实践和知识进行研究。

The thesis aims to provide a rich and exercisable method to the construction of the commercial center district.

全文主体内容共分五章：第一章导论，对论文研究对象、研究地域范围进行界定，概括地介绍了山地小城镇建设现状及经验教训，进而阐述研究的目的和意义，并介绍了山地小城镇商业中心区设计的相关研究背景和环境。

STUDY OF DEVELOPING MECHANISM AND REGULATION OF CHINESE RESOURCE-BASED CITY Resource-based city of China is a traditional research realm of Geography, however the emphasis of research shifted with the times. Before 1980s,the research based on the resource explorement, emphasizing on the evaluation of resource conditions and industry distribution; after that it turned to the research of the developing diversity, whose emphasis became the adjustment of industry structure and the sustainable development.

资源型城市是地理学研究的一个传统领域，但不同时期研究的重点有所不同。80年代之前主要着眼于资源开发和基地建设，研究的重点主要是资源条件评价和产业布局；而80年代之后主要着眼于区域和城市的发展差异，研究的重点倾向于产业结构的调整和可持续发展。

Firstly, the thesis analyzes the content of behavior consistency of C~4ISR system requirement, researches the theory of behavior consistency validation based on executable model. Secondly, it analyzes the extense form of basic state chart, researches the grammar rules and formal description method of the transition-oriented state chart. Lastly, it brings forward the method for transforming TO_StateChart to Object Petri Net model, and based on executable model, researches the method of validation for behavior consistency between the state chart and sequence diagram.

论文首先对C~4ISR系统需求行为一致性验证的内容进行了分析，研究了基于可执行模型进行行为一致性验证的原理；其次分析了基本状态图的扩展形式，研究了面向转移的状态图(简称为TO_StateChart)的语法规则及其形式化描述方法；最后研究了TO_StateChart转换为对象Petri网模型的方法，并以此为基础，深入研究了基于可执行模型进行状态图和时序图之间行为一致性验证的方法。

The study shows the effect of the students' experience after attending the competition on technological recognition. The students changed their recognition as followed: technology is not only artificial but also professional technique including the developing progress of artificial; technology creativity includes not only fabricative technology but also the learning of knowledge, the research of the materials and the choice and discussion of producing method; in the process of technology creativity, group discussion can brings different ideas and support emotion. The attending experience makes the researchers aware the continuity in technology education.

研究结果发现研究对象参加高中生高温超导磁浮创意竞赛之经验对研究对象之科技认知有所影响，在竞赛活动后其科技认知的改变情形包括：科技不只是人工产物，也是专业的技术，也包含了人工产物的发展过程；科技创新活动并非只是实作活动，也包含科技知识的学习、材料搜寻、设计和制作方法的选择与讨论；科技创新过程中，小组合作方式可产生不同的意见来源，以及彼此支持的力量；参赛经验让研究对象认为科技的延续必须要有市场也对科技的认知更加清楚。

The present study mainly focus on the growth dynamics, physiological response and biomass allocation of Fagopyrum dibotrys under three kinds of different stress conditions in order to supply some evidences for its nutritional and officinal uses as well as its protection.

本研究以金荞麦为研究对象，通过三个不同的处理，研究和分析了金荞麦在不同处理下的生长动态、生理反应及生物量的配置情况，旨在了解金荞麦在资源限制条件下，各个构件之间的资源配置方式及规律，进而研究其生殖分配特点，为其营养及药用价值的开发提供一些资料，并为其野生资源的保护提供依据。

In particular, it is suggested that resistance mechanisms to environmental stresses and related aspects in molecular biology will be the areas of emphasis in the future, in order to expand Festuca arundinacea research and provide scientific basis for its utilization.

展望了高羊茅在生理生态以及生化特性方面的研究趋势，特别是高羊茅的抗性机理以及有关分子生物学方面的研究将成为未来研究的重点和热点，为今后深入开展高羊茅的研究和利用提供科学依据。

Hence, based on cognitive load theory, cognitive theory of multimedia learning, and existing research results, this dissertation investigated the instruction design for managing extraneous, intrinsic and germane cognitive load, as well as the moderate influences of material character and learners\' individual differences. According to existing and current research results, the author integrated the forementioned two theories and advanced an engender and outcome model of cognitive load in multimedia learning.

因此，本研究以认知负荷理论和多媒体学习的认知理论为理论基础，在已有研究成果基础上，探讨优化控制外在、内在和相关三种认知负荷的教学设计方法，以及学习材料和个体差异在其中所起的调节作用，并根据已有研究成果和本研究的结果对认知负荷理论和多媒体学习的认知理论进行整合与发展，构建了多媒体学习中认知负荷的产生与结果模型。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。