共查询到20条相似文献，搜索用时 93 毫秒
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刘征华 《内蒙古科技与经济》2010,(24):46-47
根据爆发角砾岩与花岗岩体的关系,将雷门沟钼矿区爆发角砾岩分为岩体顶盖角砾岩、岩体边部角砾岩和岩体内部角砾岩,并详细研究了各种类型角砾岩的特点,同时对角砾岩进行了分类归属,进一步探讨了爆发角砾岩与钼成矿的关系,表明爆发角砾岩受花岗岩体控制,与成矿具有间接关系。 相似文献
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许宁 《中国科学院研究生院学报》2008,25(5):592-597
针对Hartshorne的Algebraic Geometry一书第4章习题12,通过爆发的无穷序列得到了离散和非离散2个赋值环,并具体给出了爆发的过程。 相似文献
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《中国科学院研究生院学报》2004,(4)
第 1期论文具有三阶中心流形的一类非线性系统的镇定 (英文 )董亚丽 程代展 ( 1 )…………………………………常识知识查询 (英文 )胡思康 郑 红 ( 1 0 )…………………………………………………………………高能电子直线加速器束流轨道校正的优化研究周祖圣 王书鸿 王九庆 裴国玺 韩家骅 ( 1 9)……在金属表面络合网格状高分子膜实现滴状冷凝的ＭＤ模拟研究梁世强 徐靖中 ( 2 6)…………………太阳射电爆发精细结构的特征提取和参数统计张丽丽 颜毅华 宋国乡 ( 33)…………………………大风天气下北京城市边界层阵风结构特征李 … 相似文献
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2007年美国爆发的次贷危机影响到了全球金融市场,对全球金融体系及经济增长都将产生深远的影响。介绍了次贷危机爆发的经过,考虑到这次危机对美国经济的影响,预测了其对我国经济发展的影响,并揭示了我国应该从这次危机中得到的警示,以保障我国经济稳定发展。 相似文献
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五种无筛器蜘蛛纺器构造的研究 总被引：1，自引：0，他引：1
对新蛛亚目、无筛器类的茶色新园蛛Ｎｅｏｓｃｏｎａｔｈｅｉｓｉ（Ｗａｌｃｋｎａｅｌ）（园蛛科）、锥腹肖蛸Ｔｅｔｒａｇ－ｎａｔｈａｍａｘｉｌｏｓａＴｈｏｒｅｌ、纵条银鳞蛛ＬｅｕｃａｕｇｅｍａｇｎｉｆｉｃａＹａｇｉｎｕｍａ（肖蛸科）、温室希蛛Ａｃｈａｅａｒ－ａｎｅａｔｅｐｉｄａｒｌｏｒｕｍＣ．Ｌ．Ｋｏｃｈ（球蛛科）、缘漏斗蛛Ａｇｅｌｅｎａｌｉｍｂａｔａ（Ｔｈｏｒｅｌ）（漏斗蛛科）等五种成蛛，在扫描电镜下做了观察，对舌状体、前纺器、中纺器、后纺器及纺器的大小纺管进行了描述与测量 相似文献
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Recent advances in electron microscopy have opened up exciting new possibilities for examination of the fine structure of matter. Whereas X-ray or neutron-based methods give structures averaged out over about 1018 unit cells, high resolution electron microscopy can reduce this to some 104 unit cells. It is, as it were, now possible to study local variations in the terrain instead of the landscape as a whole. These local variations may represent regions of chemical constitution and activity different from those of the main structure. 相似文献
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Towards plug and play filling of microfluidic devices by utilizing networks of capillary stop valves
Robust bubble-free priming of complex microfluidic chips represents a critical, yet often unmet prerequisite to enable their practical and widespread application. Towards this end, the usage of a network of capillary stop valves as a generic design feature is proposed. Design principles, numerical simulations, and their application in the development of a microfluidic cell culture device are presented. This chip comprises eight parallel chambers for the assembly and cultivation of human hepatocytes and endothelial cells. The inlet channel divides into cell chambers, after which the flows are reunited to a single chip outlet. Dimensions and geometry of channels and cell chambers are designed to yield capillary burst pressures sequentially increasing towards the chip outlet. Thus, progress of liquid flow through the device is predefined by design and enclosure of air bubbles inside the microfluidic structures is efficiently avoided. Capillary stop valves were designed using numerical simulations. Devices were fabricated in cyclic olefin polymer. Pressure during filling was determined experimentally and is in good agreement with data obtained from simulation. 相似文献
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矿田构造对瓦斯赋存规律具有重要的控制作用,进而影响煤与瓦斯突出。探讨区域构造与瓦斯的赋存规律,对于瓦斯突出的防治具有重要意义。位村煤矿属于煤与瓦斯突出矿井。矿田构造以断层和宽缓褶皱为主,断层附近瓦斯含量降低;褶皱枢纽附近,煤层顶部因顺层滑动构造形成构造煤,导致瓦斯聚集。煤层开采时,需要注意构造应力的影响。 相似文献
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A gamma-ray burst(GRB) is an extremely luminous flash of gamma rays that occurs as the result of an explosion,and is thought to be associated with the formation of a black hole.Most GRBs are billions of light years away from Earth,implying that the explosions are both extremely energetic(a typical burst releases as 相似文献
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D. Wulich 《Journal of The Franklin Institute》1984,317(3):135-145
A novel method of noise variance measurement in the presence of strong sine burst interference with unknown parameters is presented. The measurement system is based on the Adaptive Sine Pulse Shortener (ASPS) which shorts each sine pulse from which the interfering burst is composed. After this a conventional noise variance measurement method is applied. A measurement accuracy is satisfactory when the interfering signal is strong and the number of periods of interfering sine-wave in each sine pulse is great. While a practical implementation of the proposed procedure is not simple in hardware, the microprocessor implementation is quite realizable. 相似文献
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目前,中职美术教学在提倡素质教育的大环境下得到了长足的发展。美术作为一门艺术学科,是提升学生审美能力、培养学生创新能力的重要学科,而中职美术教学的重要教学目标之一便是培养学生的创新能力,由此可见美术教学对于学生创新能力提升的重要意义。但现阶段的中职美术教学对于学生创新能力的培养所发挥的作用较小,部分中职美术教师没有掌握行之有效的培养方法。文章重点分析了中职美术教学对学生创新能力的培养策略,希望能够为中职美术教学提供帮助。 相似文献
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中学素描教学是美术基础教学的重要组成部分。素描造型能力是学生美术素质的重要体现。本文以中学素描教学的目的和方法为切入点．探讨了中学素描教学过程中要合理、有效利用多种教学方法和手段,来培养学生健康的审美观,提高学生的综合艺术修养,不仅使学生获得素描技能．还要懂得素描艺术。 相似文献
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高校义工项目纷繁复杂,需要在管理中融入精细化管理的元素,将精细化管理的责任化与义工项目管理的人文化相结合。本文从高校慈善义工项目精细化管理的基本内涵,高校慈善义工项目引入精细化管理的理由、意义以及实施精细化管理需要注意的问题等方面进行分析,对精细化管理与高校贫困生义工项目的融合进行了探讨。 相似文献