THE EARLY SUMMER FLOOD PERIODS OF SOUTHERN CHINA AND THE SUMMER MONSOON CIRCULATION OF EAST ASIA

Based on the thermodynamic characteristics of the summer monsoon and foe change of the lower layer wind fields, the relation between the early summer flood periods of southern China, Including the first flood period of South China and the plum rains period of the middle-lower reaches of the Yangtze River and the activities of the summer monsoon is analysed.The establishment processes of the summer monsoon circulation of East Asia are investigated.It is shown that the beginning and ending of the flood periods are exactly in accordance with the arrival and departure of the fore boundary of the summer monsoon.The establishment process of the circulation from the very beginning of the arrival of the monsoon to the time of great prosperity of development are not the same for each year.They can be classified into four categories.Each category may have four or three stages.Besides, the structure of the summer monsoon regime of East Asia is not unitary.There exist four types of structure model of the monsoon regime of East Asia.     

东南沿海地震带（含台湾海峡地区）地震活动期的讨论

东南沿海地震带（含台湾海峡地区）地震活动存在一个３４０年左右的主要分期，目前处在１４００年以来的第二活动期。本文充分注意到７０余年的次级分期影响，分析表明，第二活动期可以简单划分为平静和释放两个阶段，释放阶段存在两个应变释放高潮时段自１９８６年进行第二高潮时段，１９９４年９月台湾海峡７．３级地震其主要标志之一，预计这一高潮时段将持续至２０４０年左右，其间可能会有效次Ｍ≥６级地震发生，并且不能排除继     

Geophysical prospection,archaeological excavation,and dating in two Hellenic pyramids

Geophysical prospection employing magnetometry and electromagnetic measurements has been applied in and around two small sized pyramids of Hellenikon and Ligourio in Argolid, Greece. The magnetic anomalies appropriately assessed were interpreted as possible archaeological targets. Subsequent test excavations revealed the presence of room foundations and parts of walls, as well as a plethora of ceramic ware. Typological study of the ceramics classified them to as early as the proto-Helladic period and to as late as the first centuries A.D. The earlier periods have been also confirmed by a novel application of thermoluminescence (TL) dating of ceramics and the megalithic stones themselves. The present results question earlier attempts classifying these pyramids at the Classical period and favour much earlier periods.     

地震进口窗：试论中国大陆及边邻强震活动关联性

本文在对我国边邻三个“地震进口窗”内M_s≥7.0级地震与中国内陆的部分M_s≥6.0级地震活动的时、空关系简述后,讨论了如何利用这种关系来预报中国内陆M_s≥6.0级地震的时、空问题,以期为大形势的趋势预报提供有益的参考.文末也对“地震进口窗”的物理意义进行了简单的讨论.     

屯溪地区震旦纪岩相古地理研究

安徽屯溪地区震旦系下统碎屑岩系和上统碳酸盐，硅质沉积岩组成，沉积相序由河流相，滨海相，陆棚相和深水盆地相组成，反映了裂陷盆地的特征。     

沉积作用水文地质期沉积水运移的阶段性

根据沉积水所承受的负载种类，把沉积作用水文地质期分为静水压力阶段，异常压力阶段及压实平衡阶段；讨论了各阶段沉积水的运移特征，沉积物释水过程及孔隙度，透水性的变化特点，对一些传统的水文地质研究方法提出了不同的意见。     

岩体节理形貌的分形维数与摩擦角的关系研究

在土木工程设计和施工中，岩体节理的摩角是一个重要参数，该值的获取既费时又费力。本文首先简要介绍节理形貌的描述方法和分形几何理论，然后将分形理论引人岩体节理摩擦角的研究中，得出了用分形维数表示摩擦角的经验公式。关键词     

先秦测绘史考

介绍先秦时期，包括三皇五帝传说时期，以及夏、商、西周、春秋，占国时代的测绘历史，并对先秦的时间上限选择，测绘史迹从神化到人化的演化，测绘学由潜科学到显科学的转变等问题进行了论述。     

天山巩乃斯河谷融雪期积雪物质平衡初步研究

本文利用１９９４年３月中，下旬在中间科学院天山积雪雪崩研究站（以下简称积雪站）野外观测到的部分资料，对融雪期季节性积雪的物质平衡进行初步分析，同时利用物质平衡方程对积雪日融出量进行计算。     

Application of distinct element method in dynamic analysis of high rock slopes and blocky structures

Comprehensive studies on the dynamic behaviours of a high rock slope of the Three Gorges shiplock and a blocky arch structure are performed using the distinct element method (DEM). Some additional functions have been incorporated into the current DEM code, including a scheme of non-uniform seismic input on the boundaries and an improved triangular mesh generator for deformable elements. Parameters from the field and laboratory tests of the project are used in the analysis of the shiplock slope. Comparisons between the DEM results and the field measurements under the excavation unloading process are made and the good agreement obtained demonstrates the effectiveness of the DEM for predicting the deformation process of the slope. The above examples of the high rock slope and the blocky arch demonstrate that the effects of different earthquake input, input mechanism and parameters on the dynamic response behaviours and collapse pattern of the systems are significant.