Sedimentary characteristics of tide-dominated estuary in Donghetang Formation（Upper Devonian）, central Tarim Basin

The Donghetang Formation （Upper Devonian） in central Tarim Basin has been thought an important oil and gas reservoir since the abundant oil and gas resources were found in the wells W16, W20, W34, and other fields. However, the sedimentary environment of the Donghetang Formation has been disputed because it suffered from both tidal and fluvial actions and there were not rich fossils in the sandstone. After the authors analyzed sedimentary features by means of drill cores, well logging data, paleosols, and with SEM obseruations, three kinds of sedimentary environments were distinguished： alluvial fan, tide-dominated estuary, and shelf. Particularly, the sedimentary features of tide-dominated estuary were studied in detail. Besides, the authors discussed sedimentary characteristics of the Donghetang Formation which was divided into two fourth-order sequences and five system tracts. At the same time, according to the forming process of five system tracts, the whole vertical evolution and lateral transition of tide-dominated estuary were illustrated clearly. Finally, the reservoir quality was evaluated based on porosity and permeability.     

新疆东准库布苏金矿床石英矿物标型特征及找矿评价意义

新疆东准库布苏金矿床石英矿物标型特征及找矿评价意义张旺生高怀忠吕瑞英（中国地质大学,武汉４３００７４）关键词石英标型特征找矿评价东准噶尔新疆１金矿成矿阶段石英的一般特征库布苏金矿位于新疆东准噶尔野马泉南约１６ｋｍ,矿区所属构造单元为西伯利亚板块准噶...     

民采空区危险性两级模糊综合评判——以招远市北截村为例

在充分搜集资料的基础上,对招远市北截村民采空区进行实地勘查,从地质条件、灾害发育程度及采空区特征3个影响因素入手,选取了9个评判因子进行两级模糊综合评判,采取最大隶属度原则确定采空区危险性等级,并进行了评估分区。评判结果能较准确地反应实际情况,为该区地质灾害防治工作及开发建设规划提供了依据。     

中巴地球资源卫星在辽东区域环境监测中的应用评价研究

对中巴资源一号卫星 CCD传感器接收的辽宁省营口幅数据 ,从几何精度、空间分辨率、数据噪声等方面 ,进行了图像数据质量评价 ,认为从总体上讲 ,达到了设计要求 ,具有广阔的应用前景 ,同时指出 ,CCD传感器在稳定性和同一性方面尚需改进     

A comparison of results from geomorphological diversity evaluation methods in the Polish Lowland (Toruń Basin and Chełmno Lakeland)

Geomorphological diversity is part of geodiversity. Study and evaluation of geodiversity, including geomorphological diversity, is often conducted in uplands and mountains, despite the fact that lowland areas are of equal importance. This paper evaluates geomorphological diversity in a small area of the Polish Lowland, using a variety of methods that have been applied in recent times for evaluating geodiversity, and presents the results on maps. By comparing these maps and analyzing the correlation coefficients of the results obtained, it was possible to identify the two methods that were best suited to indicating areas with the greatest geomorphological diversity in the lowlands. These two methods are least affected by the choice of elementary fields and data classification methods applied. The study identified the two areas with the greatest relief diversity and showed that they distinctly differ from one another. They demonstrate the major influence of processes, not only on the topographic parameters and landform types, but above all on identifying and defining total geomorphological diversity. These methods, which can be used to identify the areas with the greatest total geomorphological diversity, could readily be used in applied studies relating to abiotic ecosystem services and landscape management.     

基于图像匹配的机载遥感影像质量自动检查方法研究

航空遥感平台和技术的发展,促进了航空遥感影像在基础地理信息获取、国土监测、环境监测、应急救灾等各个领域中的应用。同时,航空遥感系统对飞行环境、气候气象反应较为灵敏,遥感影像质量的检查十分重要。本文系统地阐述了航空遥感影像质量中旋转角、航向重叠率、旁向重叠率、航带生成等参数的计算理论与方法,该方法是适应数字遥感影像的现状上提出的,并且通过自行开发的系统对算法的可行性和有效性进行验证。本文利用2009年6月机载遥感系统拍摄的1400多张影像进行实验。实验结果表明技术方法、软件系统都较为有效,达到机载遥感影像质量自动检查要求。     

北京市第四系地下水资源价值模糊数学综合评价

地下水资源价值的影响因素众多,价值系统具有模糊性和复杂性。建立了北京市第四系地下水资源价值评价指标体系,运用模糊数学模型对北京市地下水资源价值进行了综合评价,对合理制定水价具有一定的借鉴意义。     

基于超熵理论的泥石流危险性模糊综合评判

泥石流灾害往往造成巨大经济损失,但由于其影响因素众多,如何合理进行危险性评判一直是研究的焦点问题.本文以研究项目为依托,选择泥石流流域沟谷的纵剖面形态指数作为流域的地貌特征指标,用超熵理论量化泥石流流域地貌系统的稳定性与演化趋势,并借助于模糊综合评判手段,对泥石流危险性进行评价.评判结果表明:该方法的评价结果与实际较为接近,为泥石流流域系统的演化趋势预测以及危险性等级划分提供了良好的分析方法.