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For this project, in virtue of the experimental observations on the vertical vibrator,the invert torsion pendulum and the vertical pipe with capillary outlet,and by using numerical simulations of the discrete element method, the mixing and segregation of granular materials of spherical and neraly spherical shape with the different size and different density under the vertical vibration or parallel shear motion have been researched, and the relationship between the macroscopic segregation properties and the microscopic characteristics of granular materials and the outer actions has also explored. The theoretical model and method describing the mixing and segregation of granular materials is developed.

本项目通过在垂直振动台、倒扭摆、带毛细出口的竖直玻璃管等装置上进行实验观测,并采用以离散元方法为主的数值模拟,研究了具有不同粒子尺寸、密度的球形或近球形颗粒物质在具不同结构形状容器中垂直振动和剪切运动时的粒子混合和偏析情况,探索颗粒材料流的宏观偏析特性与微观特征量及外部作用间的关系,发展描述颗粒物质混合和偏析的理论模型和方法。

The requirements for lasers,optical setups,recording ma terials and chemical processing to make large-format holograms of great scenes are discussed.A model of Suzhou Industrial Park measuring 160×180cm,and other large models were recorded using an argon ion laser with an etalon on self-prep ared ultra-fine-grain silver halide plates(average grain size:20nm).Large-for mat transmission holograms (size:50×40cm) of high diffraction efficiency and lo w noise level were obtained with proper exposure and chemical processing.

分析了制作大幅面大场景激光再现全息图对激光器及光路布置、记录介质、化学处理等方面的特殊要求,用自制的颗粒平均尺寸为20nm的超细颗粒卤化银全息干板及带标准具的氩离子激光器,对场景面积达160×180cm的苏州工业园区等模型作全息记录,经适当曝光和化学处理,制得了幅面达50×40cm,且具有较高衍射效率和较低噪声的透射全息图。

According to successfully extracting and graphing of uranium anomalies, the self-center uranium anomalies and their close relationship with meandering stream systems have been observed. The uranium anomaly always develops in the distributary and turning place of meandering stream system, and is related with thin sand area (whose sand thickness and sand ratio are less than 30 meters and 40% respectively), thicker coal, fine lithology, but the highest value of uranium anomaly exists in middle sandstone.

通过对铀异常信息的成功提取及平面编图,发现延安组中铀异常呈一个又一个具有自我中心的单元出现,且与曲流河沉积体系的关系密切:通常发育于河道分岔或转弯处;普遍发育于薄砂带,一般砂体厚度在30m以下,含砂率小于40%;铀异常单元与厚煤层关系密切;主要赋存于粒度较细的岩性中,部分也富集于煤中,但铀异常最高值富集于中砂岩中。

Some coarse gold tin chute chute and sand followed are still used. The mid-19th century, experienced a mechanical transmission belt chute chute and round, becoming one of the major fine-grained non-ferrous metals ore sorting equipment.

有些粗粒砂金溜槽和砂锡溜槽沿袭至今仍有使用。19世纪中叶出现了机械传动的带式溜槽和圆形溜槽,成为当时细粒有色金属矿石的主要选别设备。

A troupe of turbanned servants poured thimblefuls of bitter cardamom coffee from brass pots with thin, curved spouts.

有个戴着穆斯林头巾的用人组成的剧团手里拿着带细管的铜壶,向外面喷洒很少量的咖啡。

P in Shule River Alluvial Fan Oasis in Gansu subsidized by CNSF. Through field geological and environmental observations and sampling, quartz OSL dating, organic carbon ~(14)C dating, as well as analysis of TOC,grain size and Pollen assemblage of the samples from ten sediment profiles in front fine grain sediment zone of the Shule River Fan, the results obtained as follows:(1)The vegetation evolution history on Shule River Alluvial Fan and circumjacent since about 13 ka B.P. could be divided into 6 phases: about 12.1-13.1ka, a sparse coniferous and broadleaf trees - shrub grassland, cold and wet climate; 9.2-12.1ka, shrub grassland, temperature rising but precipitation and humidity getting down; 5.8-9.2ka, sparse forest with the most flourish shrub grassland under the optimal climate; 4.3-5.8ka, coniferous and broadleaf mixed forests -shrub grassland, temperature rising slightly and getting dry; 4.3-2.8ka, grass vegetation and climate became more dry; 2.8-2.3ka, coniferous forests -shrub grassland, precipitation and temperature getting down, but a higher relative humidity.

本文依托于&甘肃疏勒河冲积扇5万年来古天气环境与古水文演化&项目,以疏勒河冲积扇为研究对象,通过对疏勒河冲积扇扇缘细土带全新世古天气和古水文演变进行了20余个剖面的观测和取样、石英OSL和~(14)C测年、粒度组成和TOC分析以及孢粉鉴定,获得了以下成果和熟悉:(1)距今约13ka年来冲积扇和周边植被演化经历了6个阶段:约13.1~12.1ka,以针叶林为主的针阔混交林~灌丛草原,天气冷湿;12.1~9.2ka,灌丛草原,气温升高,降水量较低;9.2~5.8ka,疏林灌木草原,植被茂盛,温度和降水最佳;5.8~4.3ka,以针叶树为主的针阔混交林~灌丛草原,气温较高,降水减少;4.3~2.8ka,草原植被,天气变干;2.8~2.3ka,针叶林~灌木草原,降水减少,温度降低,相对湿度有所增加。

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