Control of Hydrogen Sulphide by Air Injection into Rising Mains

During the long-distance pressure transportation of sewage, the interior of a rising main tends to become anaerobic, thereby producing a large amount of hydrogen sulphide at manholes and terminals. High concentrations of hydrogen sulphide have become a serious environmental and maintenance problem.
In order to prevent the production of hydrogen sulphide in rising mains, the City of Kobe (in Japan) introduced a system to inject air directly into the main.
This paper describes the results of studies on the effect of air injection on hydrogen sulphide inhibition and the relationship between water quality and the amount of air injected.     

Summary of US–Japan Exchange 2004: New Directions and Physics for Compact Toroids

Scientists from research institutions in the United States of America and Japan attended a USA Department of Energy sponsored joint international workshop on the subject of Compact Toroids (CT) in Santa Fe, NM, USA in September 2004. We outline here a summary of the topics that were discussed, some of the implications, and new directions that are likely to follow from this research. Experimental, theoretical and computational results were presented. The experimental devices and concepts, along with the theory and computational models comprise investigations of fundamental plasma physics, fusion science, and approaches to fusion energy that require magnetized plasmas.     

辽河盆地兴隆台潜山变质岩-火山岩油藏烃类注入史及其成藏模式

流体包裹体分析在石油地质学中的主要用途之一是利用成岩矿物包裹体资料进行油气运移路径、注入时间和方向的推测、计算与判断。兴隆台潜山油藏烃类包裹体均一化温度整体上呈单峰正态或不对称单峰分布,其主要形成温度为80～100℃,反映各样品具有相近的烃类包裹体形成过程。部分井的双峰温度特征暗示存在2次烃类注入期。储层烃类充注时间距今3～35Ma,可分为2个主要的充注期:距今27～35Ma和3～24Ma,以前者注入作用更强烈。潜山内部油气是由东向西注入的。成藏分为3个阶段:a)沙三段沉积晚期,形成的少量油气进入已逐步发育并定型的圈闭中,沙三末期的短暂抬升导致已聚集成藏的油气遭受一定的氧化形成黑色沥青;b)沙二段、沙一段—东营组沉积期为潜山主要油气聚集期;c)晚第三纪以来的生烃强度较弱。潜山上覆沙四段及沙三段泥岩为良好的封盖层,使油藏得以保存。      

齐40块蒸汽驱配套工艺

针对齐40块蒸汽驱先导试验和工业性试验中出现的问题,研究并完善了蒸汽驱配套工艺,降低了蒸汽驱采油成本.主要研究内容包括扩大蒸汽驱工业化试验注采工程方案编制、国内外蒸汽驱新工艺、新技术动态跟踪、耐高温防闪蒸泵的研制、蒸汽驱注汽井井口多参数遥测系统的研制、汽驱示踪剂监测技术研究、汽驱井在线多相流计量技术研究等,为同类油藏的经济高效开采提供了借鉴.     

"一注多采"技术在辽河油田超稠油油藏中的应用

“一注多采”技术在杜84断块的应用,改善了生产效果,提高了经济效益。“一注多采”方式的提出对于解决超稠油中、后期开发矛盾具有重要的现实意义。     

闵20低渗透敏感性油藏注清水研究

敏感性油藏的注水一直是油田开发的一个难点.闵20油田就是一个敏感性中偏强的油田,先期投产的注水井注清水后,井口压力上升较快,注水效果差.本文通过流动实验对闵20油田进行了注入水配伍敏感因素分析及伤害预测,确定了在注水前及注水过程中采用1%TDG-15防膨液进行防膨的预处理方案;同时通过室内实验筛选了适合该区块的三防药剂;配合PEB清水精细过滤工艺提高注入水水质.这一系列措施实施后,闵20油田注水效果得到了明显的改善.     

An efficient infrastructure for native transactional XML processing

Implementation techniques for relational database management systems (DBMSs) have proven their efficiency and robustness in many existing systems. However, many of these concepts and mechanisms cannot be used when implementing a native XML DBMS (XDBMS) because of substantial differences in the processing properties of natively stored XML documents as compared to relational tables. Therefore, we have to develop new and appropriate techniques with ACID transaction guarantees tailored to the processing characteristics of tree documents and the operations on them.

For this reason, we want to provide for an efficient infrastructure of XDBMSs consisting of tree node addressing and indexing together with fine-grained locking of tree nodes. In this respect, our prime and novel contribution is to reveal the potential of our prefix-based node labeling called DeweyIDs supporting record addressing, indexing, and locking protocols. In this paper, we first sketch our version of prefix-based node labeling and summarize a quantitative study on them. An overview of our layered XDBMS architecture indicates the concepts and functionalities to be reused from relational DBMS implementations. The core part of the paper describes the infrastructural services for XML document storage with compressed DeweyIDs, the principles and methods for navigational and declarative processing of queries, as well as the lock modes and protocols to enable efficient collaboration. Selected empirical experiments evaluate the XTC system performance and support our system assessment.     

高炉煤粉喷吹监控系统的设计与实现

由于高炉煤粉喷吹是气固二相流的气力输送,喷吹量的检测与控制变得很困难.本文通过分析高炉喷吹煤粉炼铁的工艺过程,用西门子系列的S7-300和WCC6.0实现了对喷吹过程的监控.通过程序计算实现了串罐喷吹中喷吹量的准确计量,解决了喷吹控制中的关键问题.     

二进制扫描的缓冲区溢出漏洞探测技术

缓冲区溢出漏洞自从出现以来,一直引起许多严重的安全性问题,而且随着软件系统越做越大,越来越复杂,缓冲区溢出漏洞的出现越来越普遍。本文从检测程序的漏洞方面着手,比较了以前常用的静态代码分析和实时错误注入的检测方法,提出了一种对可执行文件反汇编后的代码进行缓冲区溢出漏洞检测的技术,提高了检测软件系统漏洞的效率。     

注射成形FGH96镍基高温合金的脱粘和烧结工艺

本文以惰性气体雾化的FGH96镍基高温合金粉末为原料,采用粉末注射成形(PIM)工艺制备了难以加工的镍基高温合金材料.确定了合适的溶剂脱粘、热脱粘工艺.探索了合适的烧结工艺.结果表明:在合适的烧结工艺(真空1 270℃保温2 h烧结)下,试样常压烧结获得了均匀的组织,相对密度达到97.2%,抗拉强度达到1 007 MPa,延伸率为5%.