ENCORE钻孔导斜系统

ENCORE钻孔导斜系统由设计先进的MOLE型固定楔、MULE型活楔、RATTY型扩孔导向矛和DOLPHIN型定向仪组成。可在40－96mm钻孔中进行定向钻进，解决钻孔纠斜或分支孔钻进问题。在分析研究其、工作原理和操作方法基础上进行对比分析，指出优点并介绍了使用效果。     

黄海粘土沉积物的来源与分布

本文根据区域自然地理原理,划分黄海粘土沉积物的补给区,在粘土矿物鉴定的基础上,用法方程定量探明黄海粘土沉积物的来源与分布,绘出黄海粘土沉积物分布图。图示:黄海来源于长江的粘土沉积物的分布面积,占其总面积的56.5%,来源于黄河的占43.5%。粘土沉积物的分布同洋流、海流的分布相吻合。     

相对点位中误差及其在工程测量中的作用

阐述相对点位中误差的概念及其在工程测量中的作用,介绍相对点位中误差及相对误差椭园计算方法,以示例说明点位中误差和相对点位中误差的意义和作用。     

A Statistical Model for Investigating Climatic Trend Turning Points

A two-phase trend model is presented to investigate the turning-point signals of evolution trend in long-term series of a climatic element. Based on nonlinear fitting, the revised model brings out more evident improvement of the linear model proposed by Solow et al. (1987). Both theoretical deduction and case calculation show that our version can search the turning point and period accurately and objectively. In particular it is fit for computer exploring the turning points in long-range records from stations covering a large area, thus avoiding subjective judgement by a usual drawing method.     

Multifractal modeling and spatial point processes

The multifractal model can be applied to spatial point processes. It provides new, approximately power-law type, expressions for their second-order intensity and K (r) functions. The box-counting and cluster dimensions are different but mutually interrelated according to multifractal theory. This approach is used to describe the underlying spatial structure of gold mineral occurrences in the Iskut River area, northwestern British Columbia. The box-counting and cluster dimensions for the example are estimated to be 1.335±0.077 and 1.219±0.037, respectively. The relatively strong clustering of the gold deposits is reflected by the fact that both values are considerably less than the corresponding Euclidean dimension (=2).     

蘑菇状金伯利岩体上视电阻率异常特征

简要论述了选择低阻蘑菇状模型模拟金伯利岩体的地质依据,着重分析了联合剖面装置、对称四极测深ρ_3异常特征。     

四边形法绘制水下河床等深线图

根据水下河床水深点测量采样的既有规则格网法又有三角形法二者优点的四边形法绘制河床等深线图,该法数据结构简单,编程方便,速度快。文 图表对水下对河床水深点的数据数据结构,四边形的构万能主等深线的追踪作了详细的讨论。     

层序地层研究产生的地层学新观点、新概念和新方法——兼论建立新一代年代地层表

层序地层学在地层划分、对比、分类和级别体系等地层学根本理论问题上给地层学带来了新认识、新概念和新方法。全球层型剖面和点(GSSP)可建在层序界面的整合部位,从而将传统的自然界线(或不整合面)、层序界面和GSSP三者有机结合起来,使得年代地层界线成为可在野外识别和追索的界线。论证了层序地层是独立存在于岩石地层和年代地层之间的地层类别和包含这三个基本地层类别的新的三重地层分类方案。阐述用层序地层界线优化各类原有年代地层和岩石地层界线的原理和方法,探讨和阐述了新的地层学体系和建立新一代年代地层表的途径和方法。     

An algorithm for finding the position of a point relative to a fixed polygonal boundary

This article describes a method that determines the position of a point relative to a fixed boundary. Its advantage over the other existing algorithms described below is that in most cases it is necessary that only part of the algorithm be executed to determine the position of the point. A possible inconvenience of using this algorithm is that the contour boundary has to be entered as data. For problems where the boundary often changes the algorithm is not suitable in its present form. The applications envisaged here are to cases where the position of a very large number of points have to be determined relative to one fixed polygonal boundary whose shape is known in advance, for example, blanking out of contours in automatic contouring, or selecting drill holes which lie in the particular part of a mineral deposit.