GIS中矢量图形的结构分析与VC++中的实现

简要讨论了GIS各类矢量图形元素间的空间拓朴结构及基位置关系 ,并用VC 6 . 0及MFC具体分析了圆弧与多边形区域的相交关系及实现。为利用VC开发专用图形软件提供了有用帮助。     

建(构)筑物机械拆除方法综述

介绍了几种常用的建(构)筑物机械拆除方法,对其工作原理、特点、应用条件及局限性加以分析和说明。     

Node-pair reliability of network systems with small distances between adjacent nodes

A new method for computing the node-pair reliability of network systems modeled by random graphs with nodes arranged in sequence is presented. It is based on a recursive algorithm using the “sliding window” technique, the window being composed of several consecutive nodes. In a single step, the connectivity probabilities for all nodes included in the window are found. Subsequently, the window is moved one node forward. This process is repeated until, in the last step, the window reaches the terminal node. The connectivity probabilities found at that point are used to compute the node-pair reliability of the network system considered. The algorithm is designed especially for graphs with small distances between adjacent nodes, where the distance between two nodes is defined as the absolute value of the difference between the nodes’ numbers. The maximal distance between any two adjacent nodes is denoted by Γ(G), where G symbolizes a random graph. If Γ(G)=2 then the method can be applied for directed as well as undirected graphs whose nodes and edges are subject to failure. This is important in view of the fact that many algorithms computing network reliability are designed for graphs with failure-prone edges and reliable nodes. If Γ(G)=3 then the method's applicability is limited to undirected graphs with reliable nodes. The main asset of the presented algorithms is their low numerical complexity—O(n), where n denotes the number of nodes.     

注水开发油田砂砾岩储层含油饱和度解释模型

本文利用常规测井资料,结合储层岩性、物性、含油性之间的地质规律,解决了储层岩石粒度变化及水淹层混合水电阻率变化对储层电阻率的影响;研究出了一种对电阻率测井资料标准化的校正方法;建立了储层原始、剩余、残余油饱和度解释模型。计算的储层原始、剩余、残余油地质储量,经生产验证相对下误差小于10％;计算产水率,试油验证平均绝对误差小于10％;划分水淹油层等级,试油验证符合率在80％以上。     

不含4圈的最大简单图边数的下界

证明了具有不小于6个顶点的不包含4圈的简单图的最大可能边数的下界是2n-5。     

ELNF演算的解释技术

ＥＬＮＦ演算是我们在ＬＮＦ演算的基础上扩充逻辑程序设计能力而得到的一种函数／逻辑演算系统，它构成了作者设计的函数／逻辑语言ＲＦＵＮＬＯＧ的基础．本文介绍ＥＬＮＦ演算的解释实现技术，包括数据结构、系统结构以及各个模块的设计思想．最后给出了在此解释系统下，几个典型程序的运行时间．     

Automating the identification and analysis of protein {beta}-barrels

ßBarrels are widespread and well-studied featuresof a great many protein structures. In this paper an unsuper-visedmethod for the detection of P-barrels is developed based ontechniques from graph theory. The hydrogen bonded connectivityof ß-sheets is derived using standard pattern recognitiontechniques and expressed as a graph. Barrels correspond to topologicalrings in these connectivity graphs and can thus be identifiedusing ring perception algorithms. Following from this, the characteristictopological structure of a barrel can be expressed using a novelform of reduced nomenclature that counts sequence separationsbetween successive members of the ring set These techniquesare tested by applying them to the detection of barrels in anon-redundant subset of the Brookhaven database. Results indicatethat topological rings do seem to correspond uniquely to ß-barrelsand that the technique, as implemented, finds the majority ofbarrels present in the dataset.     

童氏标准公式的校正及应用

在童标准公式中引入校正系数，提出了童氏校正公式，应用该校正公式可对水驱断块油田以及标定采收集较低的油田进行早期含水率预测和采收率预测，应用实例表明，与实际生产数据对比，校正公式计算值比标准公式计算值的误差小得多。     

纯梁油田两种破乳剂联用的高含水原油热-化学破乳技术

纯梁油田各油气所产原油的油质（含蜡量），含水率及油温不同，将13种商品破乳剂用于纯梁各油区原油及混合油的破乳，筛选出了4种性能优良的破乳剂。将这4种破乳剂两两复配，用于混合油的破乳，最后筛选出以改性咪唑啉为起始剂的高聚物类破乳剂BSH－06和以改性树脂为起始剂的嵌段聚醚类破乳剂BCL－405。实施了联合使用这两种破乳剂的原油热－化学破乳脱水现场试验；在纯东集油计量站，在油温35℃，原油含蜡15％－20％的高含水量油中加入BSH－06，在纯西集油计量站，在油温55℃，原油含量20％，乳化水含量高的原油中加入BCL－405，加量100－80mg/L，在长3－4km的管道输送过程中破乳，在原油处理站两种原油混合后进入一级，二级沉降罐，沉降时间约4h，油水分离，原油含水降至≤0．5％，可以不再进行电脱水而直接外输，脱出污水含油量＜100mg/L。这种不同原油各用合适的破乳剂管道破乳，混合沉降脱水的热－化学破乳脱水技术，已在纯梁油田广泛应用。