Oil Resources Potential and Exploration of Ordos Basin

Ordos Basin has experienced nearly a century of oil-gas exploration since China＇s first oil exploratory well （Yan-1 well） was drilled in 1907 in Yanchang County, Shaanxi Province. A good prospect for sustained and steady development of oil and gas was thereby opened based on the efforts made by generations of petroleum geologists and oil workers. Especially in recent 10 years, petroleum geologists and oil workers in the basin have constantly emancipated their mind and developed new technologies to solve the complex low permeability geological issues and technical problems of oil-gas exploration. Three major breakthroughs have been successively achieved in Zhi（dan）Jing（bian）-Ansai area of northern Shaanxi Province, Xifeng area of eastern Longdong （ Gansu Province）, and Jiyuan region between northern Shaanxi and Eastern Gansu. Ansai, Jing＇an, Xifeng, and Jiyuan oilfields with a hundred million tons of oil reserves each have been discovered one after another, in which the new annual additional reserves have topped one hundred million tons for ten consecutive years. By the end of 2004, a total of 36 oilfields have been discovered in the basin, in which proved oil geologic reserves reached 1.31972 billion tons （excluding Yanchang Oilfield）.     

The Electromagnetic Problems of a Cylinder or Elliptic Cylinder with Infinite Axial Slits and Others

Ｔｈｅｅｌｅｃｔｒｏｍａｇｎｅｔｉｃｓｃａｔｅｒｉｎｇ，ｌｅａｋｉｎｇａｎｄｃｏｕｐｌｉｎｇｆｒｏｍａｃｙｌｉｎｄｅｒｗｉｔｈａｎｉｎｆｉｎｉｔｅａｘｉａｌｓｌｉｔｈａｖｅｂｅｅｎｉｎｖｅｓｔｉｇａｔｅｄｂｙｍａｎｙａｕｔｈｏｒｓ．Ｈｏｗｅｖｅｒ，ｔ...     

NUMERICAL SIMULATION AND EXPERIMENTAL INVESTIGATION OF THE GUIDE-VANE FLOW AND THE INFLUENCE FROM THE LEAKAGE FLOW

1 .　ＩＮＴＲＯＤＵＣＴＩＯＮＩｔｉｓｗｅｌｌｋｎｏｗｎｔｈａｔｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆｈｙ ｄｒａｕｌｉｃｔｕｒｂｉｎｅｉｓｆｏｒｔｈｅｂｅｓｔｈｙｄｒａｕｌｉｃｅｆｆｉｃｉｅｎｃｙａｎｄｓｔａｂｉｌｉｔｙｉｎｏｐｅｒａｔｉｏｎ .Ｔｈｅｓｔａｂｉｌｉｔｙｏｆｈｙ ｄｒａｕｌｉｃｔｕｒｂｉｎｅａｎｄｉｔｓ ｐｅｒｆｏｒｍａｎｃｅｏｆｃａｖｉｔａｔｉｏｎｅｒｏｓｉｏｎａｒｅｃｌｏｓｅｌｙｒｅｌａｔｅｄｔｏｔｈｅｆｌｕｉｄｆｌｏｗｉｎｔｕｒ ｂｉｎｅｃａｓｉｎｇ ,ｓｔａｙｖａｎｅａｎｄｇｕｉｄｅ…     

EFFECT OF EQUAL-CHANNEL ANGULAR PRESSING ON STRUCTURE OF Al ALLOY 2024

ＥＦＦＥＣＴＯＦＥＱＵＡＬＣＨＡＮＮＥＬＡＮＧＵＬＡＲＰＲＥＳＳＩＮＧＯＮＳＴＲＵＣＴＵＲＥＯＦＡｌＡＬＬＯＹ２０２４①ＬｉｕＺｕｙａｎ，ＬｉａｎｇＧｕｏｘｉａｎ，ＷａｎｇＥｒｄｅ，ＷａｎｇＺｈｏｎｇｒｅｎＳｃｈｏｏｌｏｆＭａｔｅｒｉａｌｓＳｃｉｅ...     

防盗窗装到了五楼

“看来我家很快也要装防盗窗了。”女儿一边说着，一边将我拉到窗前。我住在一栋六层楼的顶楼。站在阳台向前望去，前面也是一栋六层高的住宅，我看到几个工人正在五层楼的窗户上敲打，开始我以为是装修，仔细一看，他们在装防盗窗。再向两边看去，和我遥遥相对的这座楼从一到五层几乎都装上了防盗窗。     

NDSL神秘闹钟教你玩

物以类聚,人以群分。作为一个NDSL掌上游戏机的疯狂发烧友,我的周围自然也就聚集了一大堆爱玩NDSL的朋友。不过,最近这些家伙却老是对PSP掌上游戏机垂涎三尺。身为玩NDSL的人,死为继续玩NDSL的鬼,怎么可以胡乱叛逃到PSP阵营去呢？真不知PSP有啥好的——NDSL有的功能它没有,比如触摸屏;PSP有的功能NDSL也有,比如闹钟。呃,什么？你居然不知道NDSL还有隐藏的闹钟功能？来来来,让我教教你。     

Improved Corrosion Resistance of Magnesium Alloys AZ31 and AZ91HP by High Current Pulsed Electron Beam Treatment

MAGNESIUM ALLOYS are now receiving more andmore applications in the electronic communication,aeronautic and automotive products due to their lowdensity,high strength to weight ratio and goodcastability[1-3]-However,the inherently poorcorrosion resistance of magnesium alloys limits theirfurther utilization.Therefore,significant efforts havebeing made to find one way that allows improving thecorrosion resistance of magnesium alloys effectively.Increasing the purity of magnesium alloy and t…     

Always In The Learning Mode （2）

与其他行业相比，机床生产者有一个特殊的机会，那就是能在使用自己产品的过程中不断地去学习．例如，仔细研究用户的反馈就常有助于机床生产者改进产品的设计方案。事实上，善于抓住一切学习的机会也正体现了哈斯公司的企业文化和人文特点，这有助于生产者在制造过程中设计出重点目标方案。通过在生产中不断学习，哈斯公司向我们提倡了一些制造方法的要领： 1．注重模块结构，尽可能多地共享模块。 2．新模块的设计要以已存在的模块为核心。 3．保持零件简单易操作。 4．在生产中尽可能少地使用零件。所有这些原则都贯穿了一个理念，那就是”为客户带来效益”，这是因为简单的设计更可靠，也更适于服务的领域。 高效率的生产为哈斯公司的高度市场化提供了动力和支持，他们的兴趣在于寻找真正的潜在客户，这一过程往往使他们得到很多意想不到的机会去接触新的买家，随后，哈斯能坚定地重点发展一条完善的产品线，这本身就是一种创新。此外，作为一个单独的实体，“HFO”的概念更是充分地体现了哈斯良好的企业形象和优异的客户服务水平，公司向来都非常注重给客户提供产品的增值服务。与此同时，哈斯公司一直在追求工厂机器设备的不断更新以及操作技术的改进，因此我们不得不说工作对于哈斯的员工而言就意味着学习，生产使他们处于一种不断学习的状态中。     

大跨扁平隧道超长管棚法下穿交通干线技术研究

浅埋隧道下穿重要基础设施时地下结构的稳定性及周边环境变形控制是工程的重点和难点，管棚法是一项提高岩土稳定的重要技术措施。结合福建某大跨扁平超浅埋隧道采用超长管棚法下穿铁路干线的工程实践，分析棚架体系工作原理，总结出超浅埋暗挖隧道超长管棚的施工方法及技术要点。基于Winkler弹性地基梁理论，考虑三步掘进预留核心土施工过程，分析地表沉降规律及隧道支护结构内力分布特性，优化现场支护参数及支护措施设置，结合实测结果验证了计算结果及支护措施的合理性，并结合施工过程及环境特点对地表变形原理进行详细探讨。最后基于实测地表沉降，对超长管棚施做引起的沉降特点及影响因素进行系统分析，结合实际工程特点提出轨道变形控制措施，并从管棚施工技术要点提出地表沉降控制方法。