共查询到20条相似文献，搜索用时 31 毫秒
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潍坊市坚持以科学发展观为指导,不断加强矿产资源执法监管力度,严格治理整顿矿产资源开发秩序,强化地质勘查和保护治理,科学调整矿业结构,优化开发布局,全面提高矿产资源综合利用水平,取得了较好的社会效益、经济效益和生态效益。 相似文献
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岩溶作用与碳循环”研究进展 总被引：41，自引：7，他引：34
IGCP 379项“岩溶作用与碳循环”是中国建议并组织实施的,于1995～1999年执行。作者对1995年以来项目的实施情况及其研究进展作了总结,并对每一科学目标的研究进展进行了综述:①表层岩溶系统碳循环与大气CO2源汇的主要进展有3方面:扩展了研究地区;揭示了表层岩溶系统碳循环的运行机制;对表层岩溶作用回收大气CO2量进行了估算。②深部CO2释放问题的主要进展有:发现了更多的深部CO2释放带;揭示了深部CO2气体来源问题;对西藏地区CO2源汇问题进行了深入的探讨。③以岩溶记录重建环境变化过程的主要进展有:研究时空范围不断扩大;采取多种新技术、新方法获取更多古环境信息;不断提高研究分辨率。 相似文献
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R.J. Wakeman 《International Journal of Mineral Processing》1976,3(3):193-206
Fundamental data on the residual saturation of incompressible filter cakes which have been drained by vacuum have been measured. The effects of varying particle size, shape and distribution, type of wetting fluid and cake size have been assessed. A modified ‘threshold pressure’, below which dewatering will not occur, has been defined and an index reflecting the nature of the particles and their packing has been used to represent reduced saturation data. Irreducible saturation levels have been correlated against a capillary number, and by careful definition of the driving force term data scatter have been substantially reduced. 相似文献
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地裂缝从20世纪中期以来,发生频率及规模逐年加剧,已成为一种区域性的主要地质灾害。目前,山东省内已发现45处较大规模的地裂缝。该文对地裂缝形成特点及危害进行了介绍,分析了山东省已经发生的几次典型的地裂缝灾害,并提出了防治对策建议。 相似文献
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IGCP 379“岩溶作用与碳循环”在中国的研究进展 总被引：24，自引：1，他引：23
ＩＧＣＰ３７９项“岩溶作用与碳循环”是中国建议并组织实施的,于１９９５～１９９９年执行。作者对１９９５年以来项目的实施情况及其研究进展作了总结,并对每一科学的研究进展作了综述：（１）表夺溶系统碳循环与大气ＣＯ２源汇的主要进展有３方面：扩展了研究地区;揭示了秀层岩溶系统碳循环的运动机制;对表层岩溶作用回收大气ＣＯ２量进行了估算;（２）深部ＣＯ２释放问题的主要进展有;发现了更多的深部ＣＯ２释放带;揭示 相似文献
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本文揭示了南海北部海域软泥水化学的基本特征，确定了软泥水化学垂向剖面的类型，分析了软泥水化学场的形成演变机理，概括了软泥水３种成生演变模式。 相似文献
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百年勘查成果与成矿规律之集大成——首部《中国矿产地质志》研编阶段性进展概述 总被引：4，自引：0，他引：4
继顾琅和鲁迅1906年出版《中国矿产志》以来的100多年中,中国社会发生了根本性改变,中华民族由半殖民地半封建国家逐步走上了康庄大道,矿产资源功不可没。根据《国土资源"十三五"规划纲要》"总结百年勘查成果和成矿规律"的要求,《中国矿产地质志》的各项研编工作全面部署,并取得实质性进展,截止目前共完成59部成果报告,取得了一系列重要成果:制定了统一的研编技术要求,清理出全国已发现矿产地近6.5万处,划分出18种矿床类型;修订和统一了部分省区的岩石地层划分方案和地层系统;划分或修正了大地构造单元和成矿区带,探讨了大地构造格局、演化与成矿作用,总结了重点Ⅲ级成矿区带成矿规律,建立了区域成矿模式和成矿谱系;完成了部分全国性、省级(单矿种)志书和普及本,获得了一批地球化学/年代学数据,深化了典型矿床和成矿规律研究,在钨、锡、锰、镍、银、锑矿等重要矿产矿床成因与成矿规律、华南洋构造演化与成矿、前寒武纪成矿等方面取得了一些创新性成果,不仅提升了矿床学理论研究水平,还指导了成矿预测和找矿勘查,普及了矿产知识,实现了边研编、边服务,取得了显著的社会效益。 相似文献
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Aspects of riverbed evolution including bank erosion in the Ural River basin have been considered in this paper. The natural morphodynamic types of riverbeds have been described. The spatial features of their genesis have been characterized within the Ural River basin. To study the riverbed processes, decoding of remote sensing data of the water surface has been used. The risks for the infrastructure facilities and for the residential districts have been analyzed in terms of the bank erosion in the Ural River basin. The issues concerning the border between the Russian Federation and the Republic of Kazakhstan due to riverbed reconfiguration of the Ural River have been outlined. Maps of the development of bank erosion in the Ural River basin have been created. A way to solve the problem of riverbed evolution along the border area has been proposed by organizing an Intergovernmental Specially Protected Natural Zone.
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《T》文粒度计量方法及其资料的质疑和“杂基处理”的再讨论 总被引：1，自引：0，他引：1
针对《T》文所说的线计法存在忽略4.5ф以下的细颗粒,导致曲线形态畸变,提出用粗略筛折法“杂基处理”来修改线计法资料,使其与筛析资料形态符合等问题,本文分析了《T》文所示资料,通过正反两方面的对比、剖析,证明问题的产生是由于其计量方法不当,与抽样方法本身无关,线计法资料是可信赖的。粗略筛析法“杂基处理”的提出是不必要的。而且无论在理论上、方法上都存在许多问题,它是粒度计量错误基础上畸生出来的产物。因此,不宜采用。 相似文献
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对临沭县自2008年实施城乡建设用地增减挂钩工作以来的具体做法、取得的经验教训进行认真分析,特别是从项目区立项申报、组织实施和资金使用管理等方面进行深入研究,指出了存在的共性问题,总结了行之有效的经验做法,并就如何正确实施、高效组织、加快推进增减挂钩试点工作提出几点建议,希望对健康平稳推进增减挂钩工作有所裨益。 相似文献
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有色地质50余年矿产地质勘查与科研成果显著；（1）发现了许多重要矿床，探明了大量的矿产储量；（2）在保矿山和提供许多重要矿产资源建设基地中，做出了重大贡献；（3）地质科技重要成果；（4）有色地质部门在找矿，科研工作中值得纪念的大事和对今后矿产地质勘查工作的建议。 相似文献
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铁水预处理用鱼雷罐、铁水罐的炉衬多为Ａｌ２Ｏ３ＳｉＣＣ砖,随着铁水脱硫量的加大,耐火材料的侵蚀也较严重。而现在由于市场需要钢水中的磷含量要求较低,脱磷处理过程中由于国外多采用氧化铁系脱磷剂,氧化亚铁对石墨的氧化很大,对炉衬侵蚀也大,这就要求对Ａｌ２Ｏ３ＳｉＣＣ砖的性能进行改进以适宜工艺需要。国内对脱磷的研究较少,实际生产对铁水进行脱磷处理的厂家也很少。为探讨脱硫、磷剂对耐火材料的影响,本文对不同脱硫、磷剂侵蚀Ａｌ２Ｏ３ＳｉＣＣ砖后的残砖的显微结构进行了分析,探讨了铝碳化硅碳砖的侵蚀原… 相似文献
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R mode factor analysis was carried out on 48 groundwater samples collected from the Chitravati river basin, a typical drought-prone area of Andhra Pradesh, India. The samples were chemically analyzed by using conventional techniques (the analyzed data have been further standardized, and eigen values and eigen vectors have been computed). The data have been put into four major factors and the subsurface geology of the region has been clearly brought out by these factors. The areas prone to salinity hazard, recharging, and nonrecharging zones have been established. 相似文献
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在对研究区地质资料进行系统分析和野外实际调查的基础上,运用构造地质学、矿物岩石学及工程地质学,对该公路沿线地质特性进行了详细研究,总结了沿线地质灾害类型,对存在的地质灾害现状进行了评估,并对评估区进行了分区。研究结果对线路的施工及地质灾害防治等具有指导意义。 相似文献
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O. V. Verkhodanov E. K. Maiorova O. P. Zhelenkova D. I. Solov’ev M. L. Khabibullina 《Astronomy Reports》2016,60(7):630-654
Fields of the Planck cosmic-microwave background maps in the regions of radio sources of the RCR catalog have been studied. Using measurements from the Planck catalog, calibration curves have been plotted in order to determine the objects’ luminosities. The flux densities at millimeter and submillimeter wavelengths of 83 objects with normal radio spectra have been estimated for the first time; their spectra have also been constructed, they have been optically identified, and information available in various databases has been collected. A statistical comparison with a sample of sources with steep radio spectra has been carried out. Faint, difficult to characterize microwave sources make an additional contribution to the secondary anisotropy on angular scales < 7′. An algorithm for selecting candidate objects with the Sunyaev–Zel’dovich effect has been proposed, based on the use of data on the radio spectral indices and the signal in cosmic-microwave background maps. 相似文献
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介绍了近几年来大气科学领域内国内外研究的某些最新进展，对目前国际大气科学发展特.点和趋势作了简要回顾，并对今后大气科学研究重点作了讨论。
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In this paper, an integrated approach has been carried out with an intent to study the reflection and transmission phenomena of plane SH-type wave on a corrugated interface separating two magnetoelastic transversely isotropic half-space. Closed form expressions for reflection and transmission coefficients have been derived for both plane and corrugated surface. Rayleigh’s method of approximation have been incorporated to deduce equations for the first- and second-order approximation of corrugation. Analytical solutions for both the half-spaces have been worked out. All possible cases have been apprehended specially for anisotropic and an isotropic medium. The effects of magnetoelastic coupling parameter, angle at which the wave crosses the magnetic field, corrugation amplitude, frequency factor and wave number have been explained by collaborating with graphical analysis. 相似文献