ESI计量分析数据库的功能与科学评价——以中国地学研究机构的科学评价为例   总被引：2，自引：0，他引：2  

韩欣  刘子忠 《地质科技情报》2010,29(1)

ESI是国际著名的学术信息机构ISI建设的衡量科学研究绩效、跟踪科学发展趋势的计量分析数据库。在介绍ESI功能的基础上,利用ESI中10年来中国地球科学论文被引情况对国家评价、研究机构评价、科学家评价、期刊评价、论文评价等方面进行了分析。从发表论文数量看,中国已经进入地学大国的行列,但与地学强国还相距甚远。地学科学家应该在提高论文质量、提升论文引用率方面更加努力,为我国乃至世界地球科学的发展做出更大的贡献。  相似文献   

福建沿海第四纪地质调查中钻探布置及质量控制     

柳文广 《福建地质》2010,29(2):139-145

福建沿海经济区陆续开展以滨海平原、山间盆地、冲积平原、丘陵台地等为主的1∶5万第四纪地质调查,根据各地貌单元发育规律,结合1∶5万福清幅第四纪专题调查,总结了浅覆盖层勘探线的布置方法、钻孔密度、技术要求、质量控制等要点。  相似文献   

韩城区块煤层气定向井钻井工艺研究     

温继伟  陈宝义  田巍 《吉林地质》2010,29(2):148-150,155

陕西省韩城市是陕西省主要的煤炭生产基地之一,煤层气资源丰富,含气饱和度较好,是理想的靶区。利用定向钻进技术开采煤层气具有开采成本低、煤层气产量高的优点。本文以韩城区块WL2-015向1井为例阐述了煤层气定向井钻井工艺,并总结了煤层气定向钻进的相关施工经验。  相似文献   

三维地震勘探技术在新疆山区的应用效果     

范庆荣  张建州  王晶  李丽萍 《中国煤炭地质》2010,(8):54-57

新疆准南煤田铁列克井田地形复杂,冲沟发育,多为"V"字型谷,沟谷坡度较陡,区内最高处海拔2 121m,最低处为铁列克河海拔1 471m,高差650m。针对该地区三维地震勘探的主要难点,提出了针对性的技术措施,除了确保野外地震采集质量及室内资料保真等处理外,资料解释采用了全三维精细解释。实际勘探成果证明三维地震勘探技术在西部山区也可取得较好的勘探效果,为西部矿井高产高效提供可靠的地质信息。  相似文献   

上海市产业用地节约集约发展对策刍议   总被引：4，自引：3，他引：1  

陈基伟 《上海国土资源》2010,31(3):41-44,82

上海市土地资源紧缺,节约集约有限的土地担负着以利用促转型的重任。以往全市产业用地节约集约的经验,对推进工业集中、产业集聚、优化结构、提升能级等方面发挥了重要作用。面对当前构建保障和促进科学发展新机制提出的要求,全市产业用地的一些管理体制、政策体系和技术标准还显得不够完善,相关机制等还需认真探索。文章在总结分析以往全市产业用地节约集约有关做法与体制不足基础上,就如何完善各项节约集约措施,构建并完善有效运行机制,促进全市生产方式的根本转变提出了发展对策初步建议。  相似文献   

水文地质工作发展方向刍议     

黄光寿  李春立  刘富有  赵海军 《河南国土资源》1999,(3)

水文地质学的发展初期,实质上是找水水文地质学,到本世纪70年代,水资源成为水文地质学的主要问题。今天,与生态环境有关的水文地质问题的比重迅速增长,环境水文地质已成为水文地质学研究的核心问题。21世纪水文地质工作除应重视环境水文地质外,还应涉足城市地质、灾害地质、农业地质等新领域,也应在地热地质、旅游地质领域大力拓展。  相似文献   

浅谈地质科技档案资料的有偿使用     

廖萍 《南方国土资源》1999,12(2):61-62

地质科技档案是宝贵财富，由于封闭式管理模式没有发挥应有的作用，文章通过对地质科技档案在市场经济体制下，实行有偿使用的必要性及其意义作了简要论述，探讨有偿使用的方法，联系实际说明有偿使用地质科技档案的社会效益和经济效益，展示了深化地质科技档案改革给地勘单位带来活力与前景。  相似文献   

Research and development on foam breaking and recycling technology in air-foam drilling     

CAO Pinlu  ZHANG Jincheng  WU Xia  HUANG Jinyun Institute of Drilling Engineering Technology  Zhongyuan Petroleum Exploration Bureau  Puyang  Henan  China 《东北亚地学研究》2009,(4):204-209,214

In recent years, air-foam combining the advantages of both liquid and air drilling has been utilized as a drilling medium. Air-foam drilling has proved its efficiency in numerous situations where serious problems were encountered, such as in fractured formations and depleted or high permeable zones. However, the major disadvantage of air-foam drilling system is that the foam can only be used once, so that an extremely large pit is required to contain the foam to allow sufficient room for cuttings and for the foam to dissipate. Moreover, it needs enormous volume prepared, consuming abundance of water and ingredient additives, which results in the high cost of foam drilling. The recycling foam fluid by using foam breaking technology is the only effective method to solve these problems associated with the known foam drilling. Various types of equipment and technique have been employed to suppress foam formation in biological and process equipment in foam drilling. The study described various methods of foam breaking technology, and the trend of the foam breaking technology for foam drilling is discussed.  相似文献   

自升式平台桩脚在含硬壳层地基中的插深分析   总被引：1，自引：0，他引：1  

李洪  邓金根  孙焱  李炎军 《海岸工程》2010,29(2):31-37

存在硬壳层的层状地基承载能力分析是自升式钻井平台桩脚插深分析的关键,但是目前对硬壳层承载能力的确定还没有成熟可行的理论计算方法。一般的针对非均质层状地基的承载力计算方法,因参数较多,计算步骤繁琐,很难广泛应用于实际的平台桩脚入泥深度分析中。文中主要介绍了存在硬壳层的层状地基承载力的分析方法与过程,根据应力扩散原理推导并做适当的简化得到硬壳层承载力修正方法。简化后的修正方法能满足一般硬壳层承载力分析的需要,并使平台插桩深度分析计算过程变得简便。通过在实际工程的应用,得到的实测结果与理论计算值也较为一致,说明了用此方法分析硬壳层地基的平台插桩是合理、实用的。  相似文献   

Understanding salt mobilization from an irrigated catchment in south‐eastern Australia     

B. Selle  T. Thayalakumaran  M. Morris 《水文研究》2010,24(23):3307-3321

Groundwater discharge from the Riverine Plains of the southern Murray‐Darling Basin is a major process contributing salt to the Murray River in Australia. In this study, data from an irrigated 60 000 ha catchment in the Riverine Plains were analysed to understand groundwater discharge into deeply incised drains, the process dominating salt mobilization from the catchment. We applied three integrated methodologies: classification and regression trees (CART), conceptual modelling and artificial neural networks (ANNs) to a comprehensive, spatially lumped, monthly data set from July 1975 to December 2004. Using CART analysis, it was shown that rainfall was the most important variable consistently explaining the salt load patterns at the catchment outlet. Using the conceptual model representing spatially lumped groundwater discharge into deeply incised drains, we demonstrated that salt mobilization from the study catchment can be well represented by a rainfall contribution, influenced by the hydraulic head in the deep regional aquifer and potential evapotranspiration. Using ANNs, it was confirmed that rainfall had a much higher impact on salt loads at the catchment outlet than irrigation water use. All these results demonstrate that under conditions similar to those experienced from 1975 to 2004, it is rainfall rather than irrigation water use that governs salt mobilization from the study catchment. Management of salt mobilization from irrigated catchments has traditionally focussed on the improvement of irrigation practices but it could be equally important to further understand the scope for management to control groundwater discharge in these irrigation areas. Copyright © 2010 John Wiley & Sons, Ltd.  相似文献