对推进城镇化健康发展问题的思考     

师银燕 《广东海洋大学学报》2005,25(5):38

城镇化是一个国家和地区经济社会发展的重要标志，也是人类社会走向文明和进步不可逾越的阶段，所谓城镇化（也称城市化、非农化），是指人类生产和生活方式由乡村型向城市型转化的历史进程，表现为乡村人口向城市人口转化以及城市不断发展和完善的过程。城镇化是我国现代化进程中必经的历史阶段。“十五”以来，我国城镇化取得了重要进展，但在加快城镇化发展中也出现了一些偏差。《中共中央关于制定国民经济和社会发展第十一个五年规划的建议》提出，要“坚持大中小城市和小城镇协调发展，提高城镇综合承载能力，按照循序渐进、节约土地、集约发展、合理布局的原则，稳步推进城镇化”。  相似文献   

关于改进的Encke方法中参考轨道的选择和校正     

刘林  胡松杰 《天文学报》1996,37(3):285-293

对于改进的Ｅｎｃｋｅ方法，选择适当的参考轨道是一个关键．然而，对于人造地球卫星长弧轨道计算，目前所给出的几种参考轨道均需要逐段校正，这将给定轨问题带来附加的复杂性．本文将仔细探讨如何选择参考轨道和减少校正次数．  相似文献   

Revisiting Sustainable Development of Dry Valleys in Hengduan Mountains Region   总被引：5，自引：1，他引：4  

TANGYa XIEJiasui SUNHui 《山地科学学报》2004,1(1):38-45

Dry valleys are a striking geographic landscape in Hengduan Mountains Region and are characterized by low rainfall, desert type of vegetation and fragile environment. Past efforts and resources have been concentrated mainly on rehabilitation of degraded ecosystem and fragile environment, particularly reforestation, while socio-economic development has been largely overlooked. Despite successes in pocket areas, the overall trend of unsustainability and environmental deterioration are continuing. It is important to understand that uplift of the Tibetan Plateau is the root cause of development of dry valleys, and development and formation of dry valleys is a natural process. Human intervention has played a secondary role in development of dry valleys and degradation of dry valleys though human intervention in many cases has speeded up environmental degradation of the dry valleys. It is important to understand that dry valleys are climatic enclaves and an integrated approach that combines rehabilitation of degraded ecosystems and socio-economic development should be adopted if the overall goal of sustainable development of dry valleys is to be achieved. Promotion of niche-based cash crops, rural energy including hydropower, solar energy, biogas and fuelwood plantation is recommended as the priority activities.  相似文献   

用地申请被否决之后……——修武县周庄国土资源所服务新农村建设纪事     

张涛 《资源导刊(河南)》2007,(7)

"新农村建设是大事,改善群众的物质文化生活,给广大村民提供休闲、娱乐、健身的良好环境是好事,我们积极支持,但占用耕地建游园坚决不行,这是原则问题".修武县周庄国土资源所所长薛晨生这番话一出口,来递用地申请的五里堡村村委李主任满面春风的笑容不见了,铁青着脸甩手离开了国土所办公室,这是前不久发生在修武县周庄国土资源所的一幕.  相似文献   

玛多黄河源区生态环境治理:任重道远     

林志 《国土资源》2006,(1):40-43

黄河,发源于青藏高原巴颜喀拉山北麓。玛多县境是黄河源区的主要片区,这里因处于三江源区青藏高原腹地及其特殊的地理位置和高寒多风干旱的气候,生态环境十分脆弱。近20年来,由于大气环境的逐渐变暖和人类活动的加剧如草原开发和过牧等因素,玛多县境内黄河河段、湖泊、湿地及草  相似文献   

贯彻落实科学发展观为北海经济发展服务     

罗星烈 《南方国土资源》2006,(7):43-44

党的十六届三中全会提出了"坚持以人为本,树立全面、协调、可持续的发展观,促进经济社会和人的全面发展"的方针.科学发展观,对如何进一步加强土地、矿产、海洋管理工作,促进经济可持续发展,建设和谐社会提出了新的更高的要求.贯彻落实科学发展观,管好用好国土资源,为北海经济发展服务,是北海市国土资源管理部门的重要职责.笔者就此浅谈一些个人的看法.  相似文献   

子午环度盘对径改正测试的研究     

杜慕群  李志刚 《时间频率学报》1997,20(6):101-106

  相似文献   

γ射线暴的logN(>P)～logP分布     

吴枚  宋黎明  余文飞  李惕碚  李毅 《中国天文和天体物理学报》1997,(1)

本文用简单的宇宙学模型 ,在标准烛光和均匀分布的假设下计算了γ射线暴的logN(>P)～logP分布 (大小谱 ) .在考虑了探测效率修正和死时间修正后 ,由宇宙学模型计算的理论结果和BATSE实测的大小谱没有显著的偏离  相似文献   

KP-90N电子数字求积仪分划值变形系数的测定方法     

常同元 《测绘工程》1994,(4)

本文论述了KP-90N电子数字求积仪分划值变形系数的测定方法。从求积仪的脉冲变形,地形图的图纸变形两个方面进行综合考虑,最后导出了实用的分划值变形系数。并且指出了安置比例尺的计算方法。  相似文献   

APPLICATION OF ANALYTIC HIERARCHY PROCESS TO ASSESSING THE ECOLOGICAL VULNERABILITY OF WETLANDS IN THE JIANGHAN PLAIN   总被引：5，自引：1，他引：4  

WANGXue-lei NINGLong-mei HUWang-bin 《中国地理科学(英文版)》2003,13(3):272-276

Wetlands in the Jianghan Plain are important components of wetland types in lake area in the middle and lower reaches the Changjiang (Yangtze) River and they fulfill many uses and functions related to hydrology,waste assimilation, ecosystem productivity and biodiversity. Owing to natural factors and human activities, especially excessive reclamation from lakes, the shrinking process of the lakes has been accelerated. Wetland ecosystem has shown the characteristics of vulnerability. According to the analysis of wetland ecological function in the Jianghan Plain, this paper presented an index system related to productivity, stability and environmental capacity. By using the method of Analytic Hierarchy Process, we computed the values of the relative weights of the indexes, and evaluated the vulnerability level of the wetland ecosystem by the method of multi-indexes. The case study showed that the fragile extent of wetland ecosystem in the Jianghan Plain is 5.6. This means that the wetland ecosystem in the Jiang-han Plain is laid to the state of middle vulnerability. Therefore, the wetland conservation and eco-rehabilitation in the JiangJaan Plain should be paid attention to.  相似文献