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Search Results: 1 - 10 of 280249 matches for " 李秀珍? "
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从第十五届美国景观生态学年会看当前景观生态学发展的热点和前沿

生态学报 , 2000,
Abstract: 第十五届美国景观生态学会于 2 0 0 0年 4月 1 5~ 1 9日在佛罗里达举行。本次会议的主题是 ,社会与景观异质性的整合 :问题与策略。有 2 4 0多人到会 ,交流论文 2 1 7篇。虽然是美国的景观生态学年会 ,大部分学者来自美国本土 ,但由于其规模和影响较大 ,也吸引了不少国际学者前往参加 ,如澳大利亚、英国、德国、中国等十几个国家和地区都有学者到会 ,使得这次年会带有很强的国际性。笔者有幸得到美国景观生态学会和国家自然科学基金委的共同资助 ,作为发展中国家的代表前往参会 ,了解了当前美国和其他一些国家景观生态学方面的最新进展 ,与…
怀牛膝根中游离齐墩果酸及其皂甙的薄层比色测定

中国中药杂志 , 1988,
Abstract: <正>怀牛膝系苋科植物怀牛膝(AchyranthusbidentataBL.)的根。根中除含蜕皮激素外,还含三萜皂甙。三萜皂甙经水解后生成齐墩果酸、葡萄糖醛酸等。文献报道[湖南医药研究所.中草药通讯1977;(4):32]齐墩果酸有强心、消炎,利尿及抑制S-180痛株生长的作用,并能治疗急性黄疸型肝炎。因此,测定怀中膝根中甙元齐墩果酸的含量,可为用药提供科学依据。本文采用甲醇提取皂甙,酸醇
谈基础物理的渗透式教学

物理 , 2005,
Abstract: ?构建新型课堂教学模式是提高教学质量、推进素质教育的重要环节和有效途径.文章以万有引力定律的讲解为例,阐明在基础物理教学中,如何结合知识内容,对科学精神、学科前沿、学科交叉、方法思路及学科发展等进行全面渗透,以促进教学质量的全面提高.
从第十五届美国景观生态学年会看当前景观生态学发展的热点和前沿

生态学报 , 2000,
Abstract:
人参健脾丸的薄层色谱鉴别研究
,
宁夏医科大学学报 , 2011,
Abstract: 目的建立和完善人参健脾丸质量标准的TLC(薄层色谱)鉴别方法,提高标准的可控性。方法分别以白术、木香、茯苓对照药材作对照,采用TLC法进行定性鉴别。结果薄层色谱斑点清晰、分离度较好,重复性好,空白无干扰。结论所建立的方法准确、可行,可用于人参健脾丸的质量控制。
跨越尺度、跨越边界:面向复杂挑战的全球方法———2015年第九届国际景观生态学大会述评
巩杰?,
生态学报 , 2015,
Abstract:
mg(no3)2·6h2o-kno3(nh4no3)蓄热材料的制备及相变研究
,吕永康?
无机化学学报 , 2009,
Abstract:
加快转变我国对外经济发展方式的战略思考
唐海燕,
- , 2018, DOI: 10.16382/j.cnki.1000-5579.2018.04.015
Abstract: 摘要 在全面开放新格局下,我国对外经济发展方式转变已经进入新时代。因此,在评估已取得成效的基础上,结合新时代和新要求对进一步加快转变我国对外经济发展方式作出宏观层面上的分析,是十分必要的。已有研究对我国对外经济发展方式转变所取得成效的综合性评价还处于探索阶段,并且主要针对的是对外贸易领域。有鉴于此,构建包括对外投融资与国际经济合作、资源环境等因素的更为全面的综合评价指标体系,基于主成分分析法(PCA)开展测度,不仅可以发现十多年来我国对外经济发展方式转变整体上处于不断优化的过程,而且也可以明确今后转变的取向。在全面开放新格局下,进一步加快转变我国对外经济发展方式必须坚持"五大发展理念",必须与国内经济发展方式转变形成联动机制,必须基于全球价值链分工体系,必须坚持稳中求进的总基调,必须围绕供给侧结构性改革这根主线,必须优先处理好中美经贸关系。
Abstract: Under the new pattern of comprehensive opening up, transformation of China's foreign economic development mode has entered into a new era. Therefore, on the basis of evaluating the existing achievements, it is very necessary to make a macro analysis on how to accelerate the transformation of China's foreign economic development mode, combining with new requirements in the new era. The comprehensive evaluation about transformation achievements of China's foreign economic development mode is still at an exploratory stage, and related evaluation mainly pays attention to foreign trade. So building a more comprehensive evaluation index system, including foreign investment and financing, international economic cooperation, resource and environment, and then measuring transformation achievements based on the Principal Component Analysis(PCA), can not only find the overall optimization process of China's foreign economic development mode transformation in the past more than 10 years, but also make clear the transformation orientation in the future. In the new pattern of opening up, China, to speed up foreign economic development mode transformation, should adhere to five development concepts, form a linkage mechanism with the transformation of domestic economic development mode, take the global value chain division system as a basis, stick to the general tone of making progress while maintaining stability, focus on the main line of structural reform of supply side, and deal with preferentially the economic and trade relations between China and the United States.
唐山市居住区停车位共享调查
Research of Residential Sharing Parking in Tangshan
 [PDF]

, 段满, 曹会云, 雨侬
Open Journal of Transportation Technologies (OJTT) , 2016, DOI: 10.12677/OJTT.2016.51003
Abstract:
城市化进程发展和经济快速增长导致汽车保有量迅速提高,然而城市停车设施改造、扩建难度大,从而导致城市停车困难。为缓解城市停车难的问题,从居住区与其他类型建筑物停车位利用在时间上的互补特性出发,考察居住区停车位对外共享的可行性。以中等发达城市唐山为例,对不同场所的驾驶员进行了共享停车问卷调查,了解市民对居住区停车位共享的意愿;从规划、技术、管理和思想层面分析了实施居住区停车位共享需解决的几个关键问题,并提出了相应的解决措施,对缓解城市停车难问题具有一定的参考价值。
The development of urbanization and rapid growth of economic have led to the rapid increase of car ownership, however, the expansion and reconstruction of the city parking facilities is difficult, which leads to the plight of urban parking. In this paper, the feasibility of parking space in residential area was investigated, which is based on the complementary characteristics of parking space in residential area and other types of buildings. In medium developed city, taking Tangshan as example, drivers in different places were inquired to understand their willingness of sharing residential parking area. The key problems to share residential parking area were discussed from planning, technology, management and ideological level, and the corresponding measures to solve the problems were put forward, which has certain guiding significance to alleviate the urban parking problems.
当代景观生态学的进展和展望
肖笃宁,
地理科学 , 1997,
Abstract: 通过近年来国内外景观生态学的最新成果及前沿领域的概括分析,如生态空间理论与景观异质性研究、景观系统分析、景观变化模型与未来景观规划、最佳生态土地组合以及景观与文化关系等,进而就景观生态学发展中的一些重要问题,如景观生态学的理论框架、人类的生态作用、景观生态建设、景观规划等问题提出了自己的见解.
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