电厂主厂房与80m高烟囱一次爆破拆除

采用延时爆破技术一次拆除了复杂环境条件下电厂主厂房及高80m钢筋混凝土烟囱。本文针对该工程爆破拆除的技术与施工要点,介绍了爆破切口的布置、爆破参数的选取、厂房和烟囱延时起爆顺序的确定,以及预处理和安全防护措施等设计施工方案。成功的爆破经验可供类似工程参考。     

羊毛针织物起球机制与抗起球整理方法

阐述了羊毛针织物起毛起球的现象,并从纤维的结构与特性、纱线结构、织物组织结构等方面分析了羊毛针织物起毛起球的原因。介绍了目前羊毛针织物抗起毛起球整理的方法,包括减量法、树脂法以及新型整理技术等。指出了降低羊毛定向摩擦系数有助于提高抗起毛起球等级,适度降低纤维的力学性能有利于织物起毛起球现象的改善;生物酶法是最具有研究和应用价值的加工技术,但需要与其他加工方式联用才能获得较好的抗起毛起球效果。     

Investigation of a non-explosive directional roof cutting technology for self-formed roadwayOA

Traditional explosives have characteristics of high risk, large vibration, and poor directional fracturing.Consequently, an instantaneous expander with a single crack surface(IESCS), which is a novel nonexplosive directional rock-breaking technique, has been developed. The directional roof-cutting mechanism of the IESCS method, driven by high-pressure gas, was theoretically analyzed. Laboratory experiments and numerical simulations proved the directional slitting effect of the IESCS method to be...     

Symmetry analysis by computer

Approximate locations of axes of symmetry of a 2-dimensional region are detected on the basis of its border. The border, described in terms of certain directional codes, is treated as a regular polygon in a hierarchical manner where a lower level means a greater number of sides. At each level of the hierarchy, the best axis of symmetry is found which for a lower level gives a more accurate position of the unknown axis of symmetry than for a higher level. Along with an axis of symmetry, a certain error is found on the basis of which the degree of symmetry of a 2-dimensional region is defined. Programs are written in FORTRAN IV and are implemented on an EC-1033 computer.     

指纹图像增强算法研究

本文根据笔者近年来的研究试验结果，指出了传统指纹图像增强算法的不足，以两种典型滤波算法为主，对近年来流行的基于方向场估计的滤波增强算法进行了分析和评价，并针对这两种算法的不足之处提出了一种新的算法思想。     

Directional features in online handwriting recognition

The selection of valuable features is crucial in pattern recognition. In this paper we deal with the issue that part of features originate from directional instead of common linear data. Both for directional and linear data a theory for a statistical modeling exists. However, none of these theories gives an integrated solution to problems, where linear and directional variables are to be combined in a single, multivariate probability density function. We describe a general approach for a unified statistical modeling, given the constraint that variances of the circular variables are small. The method is practically evaluated in the context of our online handwriting recognition system frog on hand and the so-called tangent slope angle feature. Recognition results are compared with two alternative modeling approaches. The proposed solution gives significant improvements in recognition accuracy, computational speed and memory requirements.     

无帽口钢锭的推广应用

分析了常规钢锭与无帽口钢锭制作筒类锻件的特点。明确指出无帽口钢锭锻件的优势:提高了钢锭利用率和锻件合格率,有效降低了冶炼和锻造成本,生产效率显著提高。     

Al-4%Cu合金定向凝固温度梯度变化及界面形态演化规律

摘　要：研究了Al-4%Cu合金定向凝固界面形态随抽拉速率的演化规律及其转变机制.通过测量自行研制的定向凝固设备的温度梯度,发现温度梯度随抽拉速率的增大而减小,并随炉体温度的升高而增大.研究了Al-4%Cu合金定向凝固的界面演化及生长形态,对比后发现,在胞状生长过程中,竞争淘汰是主要的生长方式;而在高速抽拉过程中,尖端开裂是枝晶的主要生长方式.     

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钻井中，需要对将要钻达的下部地层深度进行预测，特别是在定向井的钻探过程中显得尤为重要。目前的井斜角、方位能不能满足钻达目标靶区的地质需要，或者地下地质情况（地层厚度、倾向、倾角）发生变化后钻井措施的相应改变，以及需要调整改变的钻井参数怎样确定等，都需要经过严密的计算和分析。文章对钻井轨迹和地质情况进行了分析，从地质层位的小层入手，对构造的走向、倾向、倾角，地层的真厚、铅直厚度，钻井的方位、井斜角、实钻地层厚度等参数进行了分析，在三维空间的基础上，建立了实钻的数学模型，明确了各参数间的关系。推导出的公式适用于包括定向井在内的钻井参数计算，可以在地层钻厚预测、深度对比，钻达目标靶区的水平位移及井斜角、方位角的调整，穿越储层厚度的计算及钻井参数的调整，目标靶区是否在气水界面以内及钻达预想海拔高程的钻井参数调整等多个方面进行运用，这对下步钻井达到地质目的具有重要的指导作用。     

江汉湖区浅层大位移定向井长10X井井眼轨迹控制技术

长10X井是江汉油田为实现长湖区块“湖油陆采”部署的一口浅层大位移双目标定向斜井，该井在没有顶部驱动、无随钻测井情况下，利用自主开发技术，依托油田定向井技术在Φ311.15 mm井眼，运用“PDC＋单弯螺杆+有线随钻”组成的钻具组合系统，在造斜段选择范围小、地层松软的情况下，实施浅层（井深284 m）定向造斜，完钻井深2030 m，完钻垂深1462.22 m，水平位移1238.26 m，位移与垂深比为0.85的定向钻井，采用有线随钻仪器，钻成浅层大位移定向井。长10X成功钻探，初步形成了一套用有线随钻测斜仪钻探位移／垂深大于０.８５大位移定向钻井技术，扩大了有线随钻测斜仪应用范围，为其它油田勘探和开发类似区块提供了经验。