浅析莱芜接触交代-热液铁矿的双交代渗滤作用

莱芜接触交代-热液铁矿赋存于奥陶系马家沟组碳酸盐岩与燕山晚期闪长岩的接触带及其附近.通过对各矿床有益有害组分分析,以及对成矿母岩、围岩岩石化学特征、双交代渗滤作用和围岩蚀变类型等研究,总结出"三位一体"成矿模式,进而探讨了矿体的空间分布规律及其找矿意义.     

Kinetics of bubble collision and attachment to hydrophobic solids: I. Effect of surface roughness

Influence of surface roughness of the Teflon plates on kinetics of the bubble attachment was studied. Phenomena occurring during collisions of the air bubble, rising in clean water, with Teflon plates, differing only in their surface roughness, were recorded and analysed using a high-speed camera. Variations of the local velocity of the bubble during the collisions and the time of the bubble attachment were determined. It was found that the Teflon surface roughness was the parameter of a crucial importance for the attachment time of the colliding bubble. Depending on degree of the surface roughness the time of the attachment varied by over order of magnitude (from 3 to over 80 ms). In the case the Teflon surfaces having roughness below 1 μm there were recorded four to five “approach–bounce” cycles prior to the bubble attachment. Moreover, after the first collision the rapid pulsations of the bubble shape (within fraction of millisecond) were recorded. For surfaces of roughness ca. 50 μm and larger the attachment always occurred during the first collision—there was no bouncing observed and the time of the attachment was below 3 ms. It was documented that presence of a micro-bubble at the surface facilitated attachment of the colliding bubble.     

利用三维GPR探测北极夏季海冰厚度及下表面形态特征分析

海冰在全球气候系统中扮演着重要角色。在中国第二次北极科学考察中，使用3D雷达探测结合冰钻进行海冰测量。雷达剖面上可清楚识别冰-水界面，与冰钻测量结果较好地吻合。雷达3D图像清晰显示了冰底界面在3D方向的起伏变化以及冰内构造的空间展布情况。对三维探测区域内海冰厚度统计显示，所测冰盘的平均厚度为4．15m，较厚的区域位于左下角，最大厚度约为6．4m，较薄的区域是在中央和左上角区域，最小的厚度小于3．0m。经过进一步计算可提供如海冰上下表面面积、海冰体积等参数，为遥感和数值模拟提供地面校核数据，也为海冰形成机制和动力作用过程研究提供佐证和依据。     

三维嵌套技术在有限区域模式长时间积分中的初步应用

在复杂地形条件嵌套细网格模式基础上, 利用球圈模式与有限区域模式自嵌套, 就三维嵌套方法在长时间积分中的模拟结果进行了初步分析。结果表明:三维嵌套对垂直层次选取较敏感; 在长时间积分中模式运行稳定, 积分时间越长, 其优势越明显。这为有限区气候模式侧边界方案提供了新的思路。     

由PREM地球模型计算的洛夫数

本文选取迄今为止最完善的地球模型ＰＲＥＭ,利用它所定义的地球内部基本间断面及所给物质密度的弹性等参数分布,通过求解弹性地幔运动方程,得到形变位移矢量,由此计算出二阶洛夫数。本文的理论值与观测结果符合良好。     

基于三旋转自由度激光经纬仪的结构光工程测量原理与应用

围绕具有三旋转自由度的激光经纬仪,阐述它在封闭构筑物测量中应用的优越性,提出结构光工程测量中各种扫描关系式的解算式,并用实例证明所述理论的正确性与高效率。     

三维空间实体间拓扑关系的矩阵描述

三维空间实体及其间拓扑关系的语义描述和形式化表达是三维ＧＩＳ空间数据建模的重要理论基础。在ｋ－维流形的三维空间实体形式化描述方法的基础上,根据三维空间实体的可剖分性,采用顾及维数的九元组描述框架,研究用于构成三维实体的ｋ－单纯形（０≤ｋ≤３）之间的拓扑空间关系,继而研究三维实体间的拓扑空间关系。     

找出最主要的控矿因素,建立三因控矿分析思路

通过几个已知金矿区的研究,认为到不同矿区有不同的控矿因素,首先找出最主要的控矿因素,再配合两个深层相关因素,进行矿体定位。     

Relationship between global seismicity and solar activities

The relations between sunspot numbers and earthquakes (M≧6), solar 10.7 cm radio flux and earthquakes, solar proton events and earthquakes have been analyzed in this paper. It has been found that: (1) Earthquakes occur frequently around the minimum years of solar activity. Generally, the earthquake activities are relatively less during the peak value years of solar activity, some say, around the period when magnetic polarity in the solar polar regions is reversed. (2) the earthquake frequency in the minimum period of solar activity is closely related to the maximum annual means of sunspot numbers, the maximum annual means of solar 10.7 cm radio flux and solar proton events of a whole solar cycle, and the relation between earthquake and solar proton events is closer than others. (3) As judged by above interrelationship, the period from 1995 to 1997 will be the years while earthquake activities are frequent. In the paper, the simple physical discussion has been carried out. These results supported the exploration and studies of some researchers to a certain extent. This work is supported by Foundation of the Chinese Academy of Sciences (major item).     

青藏高原东北缘断层活动变形的模拟研究

分析和讨论了位错理论模型的发展历史和应用领域，采用走滑和倾滑位错理论模型对青藏高原东北缘的多组断层活动产生的三维形变场进行了数值模拟研究，并将数值模拟结果与该地区1999～2001年间的GPS观测结果进行了对比分析。得出了甘青块体顺时针转动等一些较重要的结论和认识。