地下水污染修复技术研究进展——零价铁PRB技术的应用与实践   总被引：1，自引：0，他引：1  

胡莺 《云南地理环境研究》2007,19(1):11-15

对零价铁可渗透反应墙（Fe^0-PRB）技术在地下水污染修复中的应用进行了研究和总结。研究表明该技术具有能持续原位处理、处理组分多、价格相对便宜等优势，且近年来发展迅速，在反应机理研究、PRB的结构及安装、活性材料的改进以及实践方面都取得了突破和成果。同时也分析了当前该技术的缺陷和技术难关，如某些反应机理的不明晰、实际应用中的不良表现、实际应用范围仍比较有限等。基于进展研究和问题分析，提出了该技术的研究方向和发展前景，为在中国开展该方法的研究和应用打下基础。  相似文献   

沙拐枣属（Calligonum L.）7种植物总DNA提取方法的改进及鉴定     

晋玲  李鸣  张勇  白蕾  安黎哲  陈拓 《中国沙漠》2007,27(3):466-468

 摸索沙拐枣属（Calligonum L.）七种植物沙拐枣（Calligonum mongolicum Turcz. ）、泡果沙拐枣（C. junceum (Fisch. et Mey.) Endl.）、无叶沙拐枣（C. aphyllum (Pall.) Gürke）、红果沙拐枣（C. rubicundum Bge.）、心形沙拐枣（C. cordatum E. Kor. ex N. Pavl.）、密刺沙拐枣(C. densum Borszcz.)、乔木状沙拐枣（C. arborescens Litv.）的总DNA提取方法并对DNA样品的纯度和浓度进行鉴定,对传统的CTAB法进行方法和材料的改进,开展与总DNA相关的PCR扩增和其他遗传学分析,并取得满意的结果。其结果对于沙拐枣属植物的有关研究提供了有效的实验手段。  相似文献   

A new fault rupture scenario for the 2003 M_w 6.6 Bam earthquake, SE Iran: Insights from the high-resolution QuickBird imagery and field observations     

Bihong Fu  Xinglin Lei  Khaled Hessami  Yoshiki Ninomiya  Takashi Azuma  Hisao Kondo 《Journal of Geodynamics》2007,44(3-5):160-172

The December 26, 2003 M_w 6.6 Bam earthquake is one of the most disastrous earthquakes in Iran. QuickBird panchromatic and multispectral satellite imagery with 61 cm and 2.4 m ground resolution, respectively provide new insights into the surface rupturing process associated with this earthquake. The results indicate that this earthquake produced a 2–5 km-wide surface rupture zone with a complex geometric pattern. A 10-km-long surface rupture zone developed along the pre-existing Bam fault trace. Two additional surface rupture zones, each 2–5 km long, are oblique to the pre-existing Bam fault in angles of 20–35°. An analysis of geometric and geomorphic features also shows that movement on the Bam fault is mainly right-lateral motion with some compressional component. This interpretation is consistent with field investigations, analysis of aftershocks as well as teleseismic inversion. Therefore, we suggest that the 2003 Bam earthquake occurred on the Bam fault, and that the surface ruptures oblique to the Bam fault are caused by secondary faulting such as synthetic shears (Reidel shears). Our fault model for the Bam earthquake provides a new tectonic scenario for explaining complex surface deformations associated with the Bam earthquake.  相似文献   

Coal facies evolution of the main minable coal-bed in the Heidaigou Mine,Jungar Coalfield,Inner Mongolia,northern China     

Dai ShiFeng  Ren DeYi  Li ShengSheng  Zhao Lei  Zhang Yong 《中国科学D辑(英文版)》2007,50(2):144-152

The No. 6 Coal-bed from the Heidaigou Mine, Jungar Coalfield, Inner Mongolia is a super-large Ga deposit. The dominant carrier of Ga is boehmite in coal. The study of coal facies may provide genetic enrichment information of Ga and its carrier (boehmite) in the Ga deposit. On the basis of study on coal petrology and mineralogy, it was found that the No. 6 Coal-bed from the Heidaigou Mine of Jungar was enriched in inertinites and the microlitho-types were dominated by clarodurite. The maceral morphological features and association indicate that the coal-bed was formed in a dry sedimentary environment or in a periodic dry sedimentary environment caused by the alternating variations of groundwater level. The optimum conditions for the enrichment of Ga and its particular carrier (boehmite) were dominated by four transitional conditions: (1) the upper delta plain which was the transitional zone between alluvial and lower delta plains, (2) the transitional zone between the dry and wet forest swamps, being slightly apt to the dry one, (3) the transitional tree density between the thick and loose ones, and (4) the low moor that was the transitional zone between two high moors during peat accumulation.  相似文献   

Coal facies evolution of the main minable coal-bed in the Heidaigou Mine, Jungar Coalfield, Inner Mongolia, northern China     

DAI ShiFeng  REN DeYi  LI ShengSheng  ZHAO Lei  ZHANG Yong   《中国科学D辑(英文版)》2007,50(6):144-152

The No. 6 Coal-bed from the Heidaigou Mine, Jungar Coalfield, Inner Mongolia is a super-large Ga deposit. The dominant carrier of Ga is boehmite in coal. The study of coal facies may provide genetic enrichment information of Ga and its carrier (boehmite) in the Ga deposit. On the basis of study on coal petrology and mineralogy, it was found that the No. 6 Coal-bed from the Heidaigou Mine of Jungar was enriched in inertinites and the microlitho-types were dominated by clarodurite. The maceral morphological features and association indicate that the coal-bed was formed in a dry sedimentary environment or in a periodic dry sedimentary environment caused by the alternating variations of groundwater level. The optimum conditions for the enrichment of Ga and its particular carrier (boehmite) were dominated by four transitional conditions (1) the upper delta plain which was the transitional zone between alluvial and lower delta plains, (2) the transitional zone between the dry and wet forest swamps, being slightly apt to the dry one, (3) the transitional tree density between the thick and loose ones, and (4) the low moor that was the transitional zone between two high moors during peat accumulation.  相似文献   

Simulation analysis on the regulation of overflow ecological water consumption in arid areas——A case study in the Canmrik ecological area of the mainstream zone of the Tarim River     

CHEN Xi  HUANG Yue  QIAN Jing  LIU HaiLong  FENG XianWei  LIU Ying  BAO AnMing  WANG WeiSheng 《中国科学D辑(英文版)》2007,50(Z1)

  相似文献   

云南一次持续性暴雨过程的非地转湿Q矢量分析   总被引：12，自引：0，他引：12  

李英  张腾飞  郭荣芬 《南京气象学院学报》2002,25(2):259-264

应用非地转湿Q矢量（Q^*）理论，对2001年5月31日至6月2日发生在云南的持续性暴雨天气过程进行诊断分析。结果表明，非地转湿Q矢量辐合区是暴雨发生的有利区域；非地转湿Q矢量的垂直分布反映了次级环流的方向和强弱，云南的暴雨落区位于次级环流的上升支附近。  相似文献   

3维GIS面向对象数据模型的研究与应用   总被引：5，自引：2，他引：5  

王磊  周云轩 《测绘学报》2002,31(3):274-277

3维数据模型是3维GIS研究中亟待解决的一个核心问题。在充分分析现有3维数据模型的基础上，从实际应用出发，针对传统模型的不足，提出1种3维GIS面向对象数据模型，以解决空间不规则实体本身，以及实体间复杂关系的描述、表达和组织等关键问题，并给出此模型应用实例，证明此模型的可行性和实用性。  相似文献   

1:50000 数字高程模型(DEM)的质量控制     

刘锦君  钮利平  孙颖 《测绘与空间地理信息》2002,25(2):44-44,47

通过 1:5 0 0 0 0数字高程模型生产实践 ,对生产过程中容易出现问题的环节提出了相应的质量控制方法  相似文献   

利用GPS技术遥感大气对流层水汽含量的研究   总被引：2，自引：0，他引：2  

丁继新  成英燕  王权  党亚民 《测绘科学》2002,27(2):16-19

讨论了利用 GPS系统探测大气对流层水汽含量的原理和数学模型 ,对利用 GPS遥感大气对流层水汽的加权平均温度、水汽含量随时间的变化等一些关键问题进行了探讨。通过对我国沿海地区大连、青岛、闸坡、坎门、厦门 5个测站的实验数据的解算 ,获得了较为满意的结果。  相似文献