晋、冀、鲁、豫交界地区地震危险性的模式识别

提要本文从华北地区各地震活动带之间的相互联系出发,用文献1]的模式识别方法研究晋、冀、鲁、豫交界地区的地震危险性.结果表明该地区的中强地震活动与山西带、华北平原的地震有一定的相关性.此外,还作了控制试验,说明模式识别的结果是稳定的.

A STATISTICAL ANALYSIS OF THE RANGING MISCLOSURE OF FIGURES

This paper makes a statistical analysis of the 220 misclosures of figures of the triangulation network which are used for the study of crustal deformation. Meanwhile the adjustment of 52 independent networks is carried out to analyse the accuracy of 7 types of electronic distancers. Limit formulas for the misclosure of figure are also deduced. Thus the author proposes that in the operation norm of electronic ranging, inspection and limit demands have to be added for the miselosure of figure, which is an important index of external accuracy for the distance measuring.