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案由：2009年4月6日，桃源县人民政府网站一市民关于《是谁贪污了我们的土地使用权年限》的留言，引发了许多网民跟帖。该留言为：“攒了数十年钱，终于买了一套属于自己的房子，买完才发现这房子的土地使用权只有25年，而我国规定的住宅用地使用权应该是70年，房产开发商的解释是‘政府只拍卖了25年’。请问剩下的使用年限去哪里了？土地权使用只有25年为何用来建住宅？到底是谁贪污了我们的土地权使用年限？”桃源县国土资源局正面回复：“国家只规定了最高使用年限，没有最低出让期规定，出让期低于最高出让年限并不违法”。对此，一网名一针见血地评论，“也就是说，住宅用地出让1天至70年均可。” 相似文献
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由于时代所限，小时候熟悉的不是“语录”歌，就是所谓的“忠字”歌。随着时间的推移，有许多已经淡忘了。但“毛主席的书我最爱读，千遍哪个万遍下功夫”这首歌，记忆犹新。既然要“下功夫”，作为老三篇之首的《为人民服务》就理所当然的要铭记于心。儿时，靠的是死记硬背。当然，也有当时客观环境的所迫。毕竟童子功是扎实的。“为人民服务”，也就深深植根于脑海中，可谓根深蒂固。其实像我们这一代人，“生长在困难时期(五十年代末)、成长在动乱时期(文革时期)”，真正的中国文学功底极浅。而毛主席著作既是我们的启蒙教义，又是我们学语法、识历史的百科全书(因为“毛选”中有许多注释)。 相似文献
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<正> 地洼学理论告诉我们,构造不仅有控矿作用,更重要的还有成矿作用。陈国达教授把这种与成矿作用有关的构造称为成矿构造,并建立了“成矿构造学”的概念. “七五”期间,我们在阿尔泰额尔齐斯成矿带利用遥感技术在短时间里发现了数条弧形构造,经地面采样验证,几乎100%的具有不同程度的金富集特征,并很快在这些构造 相似文献
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老子曰：“天下万物生于有，有生于无”。创新就是打破旧的东西，创造出新的东西。胡锦涛总书记在视察中科院时指出：科技创新能力是一个国家科技事业发展的决定因素，是国家竞争力的核心，是强国富民的重要基础，是国家安全的重要保证。由此看来：任何国家或企业要想永远立于不败之地，就必须跟随时代不断地创新。对于从事钻探工程领域的地质工作者来说，只有创新才能给我们带来发展、机遇和效益!我队在“十五”期间钻探工程技术和相关学科的发展过程就足以证明了自主创新的重要性和必耍性。 相似文献
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《吉林大学学报(地球科学版)》1975,(2)
教育历来就是阶级斗争的工具,不是无产阶级专政的工具,就是资产阶级专政的工具。毛主席为我们制定的“教育必须为无产阶级政治服务,必须同生产劳动相结合”的方针,深刻的阐明了教育同政治、同生产劳动的关系,指出了教育革命的方向和道路。 “以农业为基础”,“备战、备荒、为人民”,是毛主席的伟大战略思想。“水利是农业的命脉”。我们水工系必须适应社会主义革命和社会主义建设的需要,必须切实贯彻毛主席伟大战略思想,这样才能真正做到为无产阶级政治服务。通过六年的教育革命实践,使我们越来越深刻地认识到,我们系必须坚持党的基本路线,坚持开门办学方向,努力为农业学大寨多做贡献。 相似文献
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矿物学资料与比较行星学提出了一个有争议的新假说一绝大部分地壳可能被埋在地幔深处.地球科学家早就猜想,在太阳系的星球中,我们星球的地质特征是独特的.在跨入行星探索时代的今天,比较行星学已经有力地证明了这个猜想.行星间相似性和差异性为我们提供了尚待发展的、关于行星(包括地球)起源与演化的普遍性理论的原始资料.我们已经知道,现存的一套关于地球的理论、规律和修正并来提供其他行星具体结构的约束条件.与其进一步修正这些“规律”,不如现在开始新的计划——即使这意味着放弃那些为绝大多数地球科学家“信”以为真的信条和假设. 相似文献
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我队皇城山矿区ZK202、ZK31两孔都曾出现过数层坚硬岩石，即硅化非常高的硅英岩、钾化花岗岩等，可钻性10～11级，研磨性很小。使用天然孕镶和人造孕镶钻头，平均时效只有0.4米左右，“打滑”现象比较严重。虽然采取加大压力，增加冲洗液中的岩粉含量，迫使金刚石出露，但效果都不理想，反而加剧了钻头高度的磨损。后来，我们选用了武汉地院人造电镀金刚石钻头，在岩石相同，操作规程基本一致的条件下（压力稍小，500～700kg），明显地提高了钻进效率，防止了“打滑”现象，平均时效提高到1.01米。人造电镀钻头、天然孕镶 相似文献
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谢家荣是中国地质学家群体中极其重要和突出的一位，他在地质科学领域里涉猎面之广，在我国地质界独一无二，是一位“全方位的地质学家”，是现代中国地质学领域当之无愧的拓荒者。本文略述其简历和他在中国煤岩学和煤地质学、土壤学、石油地质学、铀钍矿产地质与勘查、北京西山地质研究、中国大地构造学、矿床学、经济地质学和地质教育领域的贡献与成就。谢家荣对中国地质事业和中国地质学会的建立与成长都作出了不可磨灭的贡献，是我们永远都不应该忘记、都值得纪念的一位伟大的地质学家。 相似文献
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从“高分辨率层序地层学”概念的核心、科学要义与逻辑关系三方面着手,阐释了这种提法的科学性。指出,对这一概念的正确理解应是,高分辨率层序地层学是“高分辨率层序地层”之“学”,而不是“高分辨率”之“层序地层学”;相对于高分辨率层序地层学而言,经典的层序地层学可谓“低分辨率层序地层学”。 相似文献
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Mathematical Geosciences - 相似文献
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Methodology for geohazard assessment for hydropower projects 总被引：1，自引：0，他引：1
Fjóla G. Sigtryggsdóttir Jónas Th. Snæbjörnsson Lars Grande Ragnar Sigbjörnsson 《Natural Hazards》2015,79(2):1299-1331
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Current methods of establishing suitable locations for onsite wastewater treatment systems (OWTS) are inadequate, particularly in light of the numerous cases of onsite system failure and the resulting adverse consequences. The development of a soil suitability framework for assessing soil suitability for OWTS allows a more practical means of assessment. The use of multivariate statistical analysis techniques, including Principal Component Analysis (PCA) and multi-criteria decision aids of PROMETHEE and GAIA, enabled the identification of suitable soils for effluent renovation. The outcome of the multivariate analysis, together with soil permeability and drainage characteristics permitted the establishment of a framework for assessing soil suitability based on three main soil functions: (1) the ability of the soil to provide suitable effluent renovation, (2) the permeability of the soil, and (3) the soils drainage characteristics. The developed framework was subsequently applied to the research area, Gold Coast, Queensland, Australia, and the use of standard scoring functions were utilised to provide a scoring system to signify which soils were more suitable for effluent renovation processes. From the assessment, it was found that Chromosol and Kurosol soils provided the highest level of effluent renovation, closely followed by Ferrosol and Dermosol, Kandosol and Rudosol soil types. Tennosol and Podosol soil types were found to have a significantly lower suitability, with Hydrosol soils proving the least suitable for renovating effluent from OWTS. 相似文献
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湘南地区蕴藏着丰富的锡矿资源,锡及锡多金属矿矿床(点)分布广泛,类型复杂,它们的形成除与花岗质侵入岩体直接相关外,同时还受到区域地层和地质构造等因素的共同制约。通过对锡矿的地质背景、分布特征、矿床特征与矿化规律、矿床成因及找矿信息和标志的研究,把湘南地区锡矿的找矿归纳为:"划带、圈区、寻体、定位"的找矿模式,不仅从宏观上提出了或解决了锡矿找矿方向的问题,而且近几年来的地质找矿工作得到了实践应用,并取得了丰硕的找矿成果。 相似文献
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A new approach for calculating strain for particulate media 总被引：1，自引：0，他引：1
Discrete element modelling is a viable alternative to conventional continuum‐based analysis for analysing problems involving localized deformations of particulate media. However, to aid in the interpretation of the results, it is useful to express the results of discrete element analyses in terms of the continuum parameters of stress and strain. A number of homogenization methods have been proposed to calculate strain in discrete systems; however, two significant limitations of these methods remain. First, none of these methods incorporate particle rotation effects satisfactorily, although significant particle rotation occurs in shear bands in both physical tests and numerical simulations of granular materials. Additionally, observations of the particle displacement fields in shear bands in granular materials indicate that the displacements within the localizations are erratic. Consequently, existing linear, local interpolation approaches produce substantial variations in the strain values calculated in adjacent elements in the region of localization, hindering clear visualization of the strain localization as it evolves. A new method of domain discretization for calculating strain is proposed. This method is capable of capturing particle rotation and employs a non‐local meshfree interpolation procedure capable of smoothing the erratic displacements in strain localizations, which better defines their evolution. The proposed method is validated for problems involving both two and three dimensions. A number of methods are compared with the proposed method and pertinent insights are made. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
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Recent emergency flood situations at European rivers have revealed the demand for better and in-time information for citizens
in flood prone areas about flood development, as well as better coordination of resources and actions during pre-flood phases
and its critical stage. Information and Communication Technology (ICT) has a large potential to improve the situation. Decisions
may be supported by information about resources available at the region and national level, by information about means and
access to critical locations at the prevention as well as the evacuation phases, and by including citizens as well as managers
into one common information and communication process. The paper outlines the potential of ICT for these aspects. 相似文献
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我国海洋生态调查指南编制说明 总被引：1，自引：0，他引：1
海洋生态调查的主要目的是了解海洋生态系统基本的群落结构和生态功能及其重要影响因素,掌握生态系统健康状况，把握其变化趋势。基于生态系统健康理论建立我国海洋生态调查的基本框架体系，编制了我国海洋生态调查指南。根据目前的技术设备、实用方法和经费限制，确定最能反映我国海洋生态系统特征的生态要素和评价内容，并规定了相应的调查和评价方法。与《海洋调查规范海洋生物调查》和《海洋监测规范》比较，该指南具有3个显著特点：①调查要素不仅包括海洋生物和海洋环境等自然要素，还包括人为活动要素，充分考虑我国近海生态系统的高强度开发利用的特点；②从生态系统的结构、功能和压力3个方面建立起海洋生态系统健康评价的核心框架体系；③提出生态压力的量化指标，定量评估人类活动对生态系统的压力。 相似文献
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《Russian Geology and Geophysics》2015,56(7):1074-1082
We consider possible approaches to the long-term prediction for seismic hazard in relation to the practical need for the safety of geological disposal of long-lived radioactive waste. The required period of prediction significantly exceeds the one reflected in the set of maps of General Seismic Zoning of the territory of the Russian Federation (GSZ-97). The first geological repository in Russia is planned to be set up in the Nizhnii Kan granite massif in the Krasnoyarsk Krai. This region is an intraplate territory with a relatively high seismic activity. We summarize the analysis of the known empirical generalizations and theoretical principles underlying the seismic hazard prediction. Real seismic events constantly violate forward-looking statements even for relatively short periods of time. These and other arguments suggest that the hypothesis of stationarity of the seismic regime, which is the basis of long-term prediction today, has limited and uncertain applicability in time. Intraplate earthquake prediction is especially uncertain because of the uncertainty in the factor responsible for generating tectonic stresses in these regions. The short horizon of the prediction, based on statistical methods, can be attributed to the nonlinearity of seismic geodynamic processes. Fundamental laws of tectonic processes should be used as the scientific basis for long-term predictions for seismic hazard at the sites chosen for geological disposal of long-lived radioactive waste. These processes can be reflected in models for the migration of the seismically active boundaries of lithospheric plates and the occurrence of seismic activity in intraplate regions. 相似文献