深海吸力锚水平极限承载力研究

深海吸力锚基础的极限承载能力是海洋工程锚固系统的一个关键问题。基于Coulomb摩擦接触对原理,给出一种模拟吸力锚承载能力的有限元模型。在该数值模型基础上,利用通用有限元分析软件ABAQUS,研究系泊点位置、吸力锚长径比对极限承载力的影响,并给出深海吸力锚失稳模式。结果表明,系泊点位置极大地影响着吸力锚的极限承载力与稳定性,系泊点位置的变化会导致吸力锚出现前倾转动、平移滑动和后仰转动失稳模式,同时吸力锚失稳模式受长径比的影响。为工程实际和理论分析提供了技术支持和理论指导。     

伴生金的工艺矿物学研究方法

本文讨论了开展伴生金工艺矿物学研究的一些新技术与方法，如相态分析法、工艺配方法、理想回收率计算法及金矿物粒度测定法等。上述方法可不同程度地适用于岩金乃至于砂金的工艺矿物学研究。     

复杂断块油田提高采收率的途径

由于采收率是可采储量与地质储量的比值，在地质储量一定的条件下，采收率的提高意味着可采储量的增加，在地质储量及可采储量都在变化时，我们不应拘泥于采收率数值的大小，而要在一定的经济技术条件下，尽可能通过各种增产措施来提高有经济效益的可采储量。     

使用GMS数值化卫星资料估计梅雨锋降水的初步探讨

应用ＧＭＳ可见光和红外通道数值化资料，针对梅雨锋云系特点，选用云顶红外计数值、可见光计数值、红外计数值梯度等因子，用逐步回归法导得高层高积云、多层云和积雨云的降水与上述因子的关系。并将估计结果与理论、实测降水比较，表明该方法估计效果较好，采用云分类降水估计结果比无云分类的要好。     

The bearing capacity of surface strip foundations on geogrid-reinforced sand and clay — a comparative study

Summary Laboratory model test results for the ultimate bearing capacity of a strip foundation supported by geogrid-reinforced sand and saturated clay are presented. One type of geogrid only was used for all the tests. On the basis of the model test results, the optimum depth and width of reinforcing layers and the optimum depth of the location of the first layer of the geogrid in sand and saturated clay were determined and compared.     

Decline curve analyses revisited

Empiricaldecline curve forecasts of future production rates and cumulative production to be expected from certain classes of petroleum reservoirs has been a methodology practiced and relied on by petroleum geologists for many years. New ways to consider the subject are described in this paper. Thereby it is seen that these forecasts sometimes can be made even when some of the record of the past performance history is sparse (say, because it has been lost, or never recorded).SI Units D, D _i initial reference production rate,s ^–1 - n dimensionless constant [cf. Eq. (1)] - N cumulative production, m³ - Q, Q _i production rate att and initially, m³/s - R dimensionless time variable [cf. Eq. (9)] - t time, s     

井控处理中的真振幅恢复与Q补偿方法及应用

在地震资料处理中,可以使用井控地震处理技术,即通过井资料求取球面扩散补偿因子和Q补偿因子。在获得的Q值附近进行扫描,将不同Q补偿的偏移剖面与井资料进行匹配分析,最终获得精确的Q值。实际资料真振幅恢复和Q补偿结果表明,该方法有效地实现了地震资料真振幅恢复和Q补偿,并取得了满意的结果。     

Enhanced change detection index for disaster response,recovery assessment and monitoring of buildings and critical facilities—A case study for Muzzaffarabad,Pakistan

The availability of Very High Resolution (VHR) optical sensors and a growing image archive that is frequently updated, allows the use of change detection in post-disaster recovery and monitoring for robust and rapid results. The proposed semi-automated GIS object-based method uses readily available pre-disaster GIS data and adds existing knowledge into the processing to enhance change detection. It also allows targeting specific types of changes pertaining to similar man-made objects such as buildings and critical facilities. The change detection method is based on pre/post normalized index, gradient of intensity, texture and edge similarity filters within the object and a set of training data. More emphasis is put on the building edges to capture the structural damage in quantifying change after disaster. Once the change is quantified, based on training data, the method can be used automatically to detect change in order to observe recovery over time in potentially large areas. Analysis over time can also contribute to obtaining a full picture of the recovery and development after disaster, thereby giving managers a better understanding of productive management and recovery practices. The recovery and monitoring can be analyzed using the index in zones extending from to epicentre of disaster or administrative boundaries over time.     

UCXP-wa相机影像的立体模型恢复技术探讨

针对UCXP-wa相机影像的特点,本文介绍了利用外方位元素恢复立体模型的方法。分析影响空三加密成果质量的因素,并结合工作实际,总结作业中的注意事项,对常见错误进行解决分析。     

查干凹陷巴音戈壁组沉积演化及有利砂体分布预测

查干凹陷作为中原油田重要的能源接替基地之一,巴音戈壁组是主要的稀油勘探层位。其中,巴一段为湖盆初始断陷期,巴二段为湖盆深陷扩展期。通过对研究区内岩心观察、测井、录井资料分析,结合湖盆内部断裂结构特征研究和古地貌示意恢复,结果表明:巴一段古地貌表现为"洼-隆"相间特征,主要发育扇三角洲、近岸水下扇和滨浅湖-半深湖相沉积;巴二段古地貌受同沉积断层影响,表现为"两洼两隆夹一槽",总体呈现"北浅南深",主要发育扇三角洲相、前缘滑塌浊积相及滨浅湖、半深湖-深湖相。区内主要发育有"板式、铲式"两种断裂结构类型,铲式断层控制的砂砾岩受次级断裂影响,砂砾岩单层厚度较大,扇三角洲前缘相发育,是深层最有利勘探区;受盆内同期活动断层影响形成的滑塌浊积扇单层薄、展布宽,是深层较有利勘探区带;板式断层控制的砂砾岩展布窄、单层及累积厚度大,快速堆积的近岸水下扇发育,储层质量最差。