高原机场冰碛土地基强夯处理及试验检测     

王庭博  宋德朝  顿志元 《岩土工程技术》2012,26(3):152-154

以四川稻城亚丁机场土石方工程原地面地基处理后冲兴段为例,阐述高原冰碛土地基的强夯处理及效果检测。采用波速测试与动力触探试验相结合的检测方法,并以载荷试验结果作参照对比,评价强夯效果达到了设计要求。此联合检测的方法,对类似加固地基效果检测具有一定的参考价值。  相似文献   

Geochemistry of major and trace elements in Permian coal: with an emphasis on No. 8 coal seam of Zhuji coal mine,Huainan Coalfield,China     

Shancheng Chen  Dun Wu  Guijian Liu  Ruoyu Sun  Xiang Fan 《Environmental Earth Sciences》2016,75(6):494

  相似文献   

A typical example of the application of the `Multi-Cloud Model'method to the asymmetric profiles processing     

Jin-ping Dun  Xiao-Ma Gu  Shu-Hua Zhong 《Astrophysics and Space Science》2000,274(3):473-479

Multi-Cloud Model(MCM) is an effective method for dealing with asymmetric profiles of spectral line formed by active objects on the sun. A typical example is given for the application of the MCM method in this paper. The H _β spectral data of a large post-flare loop (PFL) system which occurred on the solar western limb are obtained with MW-SSHG at the Yunnan Observatory and analysed based on the MCM method. The line-of-sight velocity fields observed in different times are derived and discussed. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

海洋水色CCD成像仪光谱非线性校正   总被引：1，自引：0，他引：1  

郑玉权  崔敦杰 《遥感学报》1999,3(2):107-111

个理想的光学遥感器,在响应波段内光谱响应度是完全平直的,遥感器的输出与入射的辐射成完全的线性关系;而实际的遥感器并非如此,它的光谱响应度在响应波段内并不是平直的,这就使遥感器的输出不仅与入射的辐射有关,还与遥感器的光谱响应度有关,实际测量时,由于目标光谱形状的差异会导致输入与输出之间的非线性关系。利用仪器定标时采用的光源光谱形状与实际测量时目标光谱形状对仪器的输出数据进行校正会有效地减小由于遥感器的光谱响应非均匀性引入的测量误差。文中利用测得的海洋水色ＣＣＤ成像仪的各波段光谱响应度,计算了已归一化为具有相同的带内平均光谱辐亮度的不同温度黑体输出,由输出结果可以看到,不同的光谱形状对海洋水色ＣＣＤ成像仪的输出影响较大,为了减小由此引入的测量误差,文中对实验室定标用积分球光源和海洋水色ＣＣＤ成像仪在轨工作时的典型输入辐亮度的光谱特性进行了等效黑体拟合,并以此为依据计算了海洋水色ＣＣＤ成像仪在轨工作时的光谱非线性修正因子。  相似文献   

Feasible conversion degree of dryland to paddy field in Jinxian County,Jiangxi province,China     

Dun Yu  R. D. Ramsey  Xiao-Min Zhao  Yong-Qi Fu  Cong-Kang Sun 《国际地球制图》2019,34(9):1042-1053

The purpose of this paper was to evaluate the feasibility of conversion from dryland to paddy field in Jinxian County under the water resources constraint and dryland suitability condition. We constructed a water resources balance model to evaluate irrigation needs and a dryland suitability model that coupled various spatial data layers. Our research showed that under the water resources constraint, the amount of conversion from dryland to paddy field was 26,971.69 ha and the feasible conversion degree of dryland to paddy field was 0.84, while under the dryland suitability condition, it was 23,262.74 ha and 0.72, respectively. According to the principle of maximum constraint, we conclude that the feasible conversion degree of dryland to paddy field was 0.72. This research can provide an objective and scientific basis for carrying out a programme of farmland conversion in counties of China as well as similar areas worldwide.  相似文献   

基于GIS的呼和浩特市近百年街道时空演变及其特征分析   总被引：1，自引：1，他引：0  

乌敦  阿拉腾图娅  木希叶乐 《地理科学》2019,39(6):987-996

以历史文化名城——呼和浩特市城区为研究区,以GIS为技术平台,运用现代地图、古地图、遥感影像数据以及史料和现代文献,制作了6个典型时期历史街道GIS数据,定量与定性相结合分析了研究区近百余年的街道时空演变过程及其特征。结果显示：研究区近百年的街道时空演变具有“摊饼式”空间扩展特征、先集聚后分散的空间演变特征;解放初期至改革开放时期的街道演变具有向内填充式发展与向北缓慢扩展相结合演变的特点,而快速城市化时期研究区新增街道以原归化、绥远城为中心向四周延伸,呈现出向外扩展的空间演变特征;百余年后的今天,原归化城内的街巷基本消失,而绥远城内的街道基本上保持了清代的棋盘式格局;人口增加、城市规划与建设、集聚与分散以及地质地貌条件等是研究区街道时空演变的主要驱动因素。  相似文献   

PRELIMINARY STUDY ON THE FORMATION MECHANISM OF COUNTER WESTERN BOUNDARY UNDERCURRENTS BELOW THE THERMOCLINE——A CONCEPTUAL MODEL   总被引：1，自引：0，他引：1  

王凡  胡敦欣 《中国海洋湖沼学报》1999,(1)

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