柴达木盆地西部大风山地区古近系下干柴沟组下段物源方向研究

目前普遍认为柴达木盆地西部大风山地区古近系下干柴沟组下段(E13)只发育向西南方向流动的牛鼻子梁物源所形成的冲积扇-河流-辫状河三角洲-湖泊沉积体系,对于物源方向的这种认识难以解释以下事实:第一,风2井在E31发育厚层辫状水道砂岩,而位于上倾方向碱1井的对应层位则发育薄、中厚层河口砂坝砂和分流水道砂;第二,在E13沉积时,牛鼻子梁地区是阿尔金山向东南方向延伸的古鼻梁,该古鼻梁是牛鼻子梁以北地区物源向西南方向流动的屏障;第三,牛参1井位于长期继承性发育的一里坪凹陷的西北边缘,大风山地区的古地貌要高于一里坪凹陷;第四,坪东F1断层与坪东F2断层所夹持的区域在E31时是一个继承性发育的小型断陷。在综合研究该地区的钻井、测井、二维地震资料和古地理背景的基础上,首次提出在E13沉积时,大风山地区的物源来自红三旱一号以北地区,而一里坪坳陷是牛鼻子梁物源汇聚区的新认识。这一新认识对于重新认识大风山地区的沉积体系及寻找优质有效碎屑岩储层具有重要的勘探实践意义。     

一种新的TOC含量拟合方法研究与应用

由于取样的限制,通常在烃源岩评价中往往只能获得十分有限的实测烃源岩的TOC含量数据。但随着我国多数盆地精细勘探的深入,需要更加精细的烃源岩评价,因此,人们对测井数据拟合烃源岩的TOC含量变化越来越重视。目前该技术最先进的是人工神经网络拟合方法,但多种神经网络在拟合高成熟度碳酸盐岩烃源岩地层的TOC含量时相关性均不够高。针对研究区内烃源岩的特点,尝试了一种用图版分类-模糊排队-BP神经网络联合拟合TOC含量的新方法。利用该方法对鄂尔多斯盆地马家沟组的测井资料和实测总有机碳资料进行数据处理,将结果与ΔlogR方法、模糊神经网络方法的结果相比较,证实该方法的结果与实测值有更好的相关性,为系统了解鄂尔多斯盆地下古生界烃源岩发育提供了一定的科学依据。     

Water governance and scalar politics across multiple-boundary river basins: states,catchments and regional powers in the Iberian Peninsula

Karezes (qanats), historically vital sources of water for multiple uses in the driest parts of the world, have been deteriorating over the past five decades. This paper provides a review of the global literature on the status and potential of karezes, and offers country case studies for Afghanistan, Iran, Pakistan, and Kingdom of Saudi Arabia. It offers syntheses of key issues, lessons, options and proposed interventions for re-vitalizing the karez systems. The paper identifies criteria for prioritizing karez systems for rehabilitation and outlines key conditions for their effective functioning and sustainability. The paper suggests that the benefits of restoring karez systems to local communities are large and some systems, such as the Ain Zubaida in the Makkah Al-Mukaramah Region, are of global importance.     

青东凹陷油气资源潜力

青东凹陷是济阳坳陷的一个次级的构造单元,位于渤海浅水海域。该凹陷主力油源层埋藏浅,成熟度低,人们对其勘探潜力认识不足。文章对青东凹陷石油基础地质条件进行了综合分析,认为其深洼区烃源岩已经成熟;并提出凹陷构造运动微弱,保存条件较好,以及油气近距离成藏等新认识;经研究认为有利勘探区域为靠近生油中心的各类构造和地层 圈闭。     

莺-琼盆地纵横波速度特征与AVO响应特征的关系研究

在莺-琼盆地,气层表现出了多种多样的AVO特征,有的为"Ⅲ"类,有的为"Ⅳ"类或"Ⅱ"类,有的偏离背景,有的与背景一致,这些复杂多样的AVO特征为应用AVO技术进行流体检测带来了较大的困难.为此,本文对近百口已钻井储层的AVO特征与纵、横波速度特征的关系进行了研究,并对产生这种关系的原因进行了详细分析,结果表明储层的纵...     

Natural and human forcing in recent geomorphic change; case studies in the Rio de la Plata basin

An analysis of geomorphic system's response to change in human and natural drivers in some areas within the Río de la Plata basin is presented. The aim is to determine whether an acceleration of geomorphic processes has taken place in recent years and, if so, to what extent it is due to natural (climate) or human (land-use) drivers. Study areas of different size, socio-economic and geomorphic conditions have been selected: the Río de la Plata estuary and three sub-basins within its watershed. Sediment cores were extracted and dated (²¹⁰Pb) to determine sedimentation rates since the end of the 19th century. Rates were compared with time series on rainfall as well as human drivers such as population, GDP, livestock load, crop area, energy consumption or cement consumption, all of them related to human capacity to disturb land surface. Data on river discharge were also gathered. Results obtained indicate that sedimentation rates during the last century have remained essentially constant in a remote Andean basin, whereas they show important increases in the other two, particularly one located by the São Paulo metropolitan area. Rates in the estuary are somewhere in between. It appears that there is an intensification of denudation/sedimentation processes within the basin.Rainfall remained stable or varied very slightly during the period analysed and does not seem to explain increases of sedimentation rates observed. Human drivers, particularly those more directly related to capacity to disturb land surface (GDP, energy or cement consumption) show variations that suggest human forcing is a more likely explanation for the observed change in geomorphic processes. It appears that a marked increase in denudation, of a “technological” nature, is taking place in this basin and leading to an acceleration of sediment supply. This is coherent with similar increases observed in other regions.     

斗轮机的全功能尾车技术改造

针对江苏徐州发电有限公司原有4座煤场存煤量只有8天左右安全用煤,不能满足安全生产这一问题,结合煤场改造研制了一种新型的斗轮机全功能尾车。介绍了尾车的组成、堆取变换的原理及过程,分析了新型全功能尾车的优点,对该斗轮机全功能尾车应用效果进行了评价。     

非稳腔的远场光强分布和光束质量

在对远场光强分布分析的基础上,对非稳腔的光束质量作了详细研究。证明了当遮拦比ε→1时,其远场光强是零阶贝塞尔光束分布。对数值计算结果的物理分析表明:用“桶中功率”曲线是评价非稳腔远场光束质量适用的方法。同时,也指出了这种方法的不足之处。     

智能网中的SCP过载控制研究

本文首先对Ｃａｌｌａｇｐ、Ｐｅｒｃｅｎｔ和漏梭算法进行了比较,得出了漏桶算法健壮性强适用于ＳＳＰ限制呼叫的结论。通过对过载控制框架的描述,提出了一种基于动态调整的控制算法用于ＳＣＰ过载控制。最后将算法进行扩展,使其满足不同的公平性条件,并适合在多业务环境各执行。模拟结果表明此算法具有较好的有效好性和公平性。     

ATM网络的使用参数控制

使用参数控制（ＵＰＣ）是ＡＴＭ网络流量控制的一个重要手段。文章从对ＵＰＣ的要求出发,分析了几种ＵＰＣ监测机制,并给出它们的实现方法。另外 ＵＰＣ机制对违 约信元采取的向种警管措施,指出了它们的优缺点,并在此基础上提出了一种新的警管想法。