利用GPS观测资料划分现今地壳活动块体的方法   总被引：17，自引：7，他引：10  

石耀霖  朱守彪 《大地测量与地球动力学》2004,24(2):1-5

利用GPS观测资料研究地球动力学问题是目前地学中的热点。利用GPS观测的速率(或位移)计算网格点附近小区域的应变张量和转动的欧拉极．再运用聚类分析法对计算的欧拉极进行分类，由此划分出地壳活动的次级块体。最后以中国大陆GPS观测结果为例，将中国大陆划分为9个活动块体，通过比较发现，所得结果与目前其他方法给出的结果大体一致。  相似文献   

色球活动双星HR1099Hα发射线的高分辨率分光观测和分析     

茶光伟  卢方军  刘学富  谭徽松 《天文研究与技术》1994,(1)

本文给出ＨＲ１０９９（Ｖ７１１Ｔａｕ）的高色散、高分辨率的分光观测结果。从观测结果分析，该双星系统的两子星均有剧烈的色球活动，强的Ｈα发射主峰主要来自活动性强的冷子星，谱线轮廓形状的大幅度变化取决于色球发射物质的运动和恒星内部的物理变化。  相似文献   

Formation and structure of neutrino astronomical objects     

Lu Tan 《Chinese Astronomy and Astrophysics》1981,5(4):377-380

Neutrinos with non-zero mass could gather to form a new kind of astronomical bodies: the Neutrino Astronomical Objects (NAO). We have investigated the mechanism of their formation and the relation of this formation to that of the galaxies, ascertained their e, p, He⁴ content, whose presence should produce a series of observable effects. NAOs are a peculiar kind of heavenly bodies with many new properties. They have a linear size of the order of 100 pc, a total neutrino content of the order of 10¹⁴M and an e, p, He⁴ content of the order of 10⁹M.  相似文献   

Interannual, decadal and century scale climatic changes revealed by stalagmite records     

Ming Tan  Xiaoguang Qin  Dongsheng Liu  Tungsheng Liu 《中国科学D辑(英文版)》1998,41(4):416-421

The stalagmite chronological table is established based on the definition of annual character of microlayers of a stalagmite by comparing the laminated rhythm to natural cyclic processes. Climatic anomalies lasting over ten years and rapid climatic changes such as abrupt changes of mean value, of variability, of trend and of cycles are discovered from the stalagmite chronological table. Stalagmites which record interannual to century scale climatic changes are excellent This work is a part of PANASH/PEP-II Project, and supported by the National Natural Science Foundation of China (Grant Nos.49672134, 49894170), Chinese Academy of Sciences (Grant No.KZ951-A1-402-06-02), and State Science & Technology Commission of China.  相似文献   

Grey characteristics of microbanding of stalagmite in Shihua Cave, Beijing and its climatic signification(I)   总被引：2，自引：0，他引：2  

Xiaoguang Qin  Dongsheng Liu  Ming Tan  Tieying Li  Jinpo Lü  Zhaoyan Gu  Houyuan Lü  Zhongli Ding  Zhengtang Guo  Jiaqi Liu  Gaozhong Nie 《中国科学D辑(英文版)》1998,41(2):151-157

Grey microstructure of microbanding in thin sections of stalagmite T9501 from Shihua Cave, Beijing was studied. The types of grey and the morphologic features of organic material were classified. The signification of microbanding and annual layer was discussed. The standard distinguishing the false annual layer and the multi-year layer is set up, which provides the theoretic fundaments for paleoclimatic study. Project supported by the National Natural Science Foundation of China (Grant No. 49672134).  相似文献   

Identification of the governing parameters related to rock indentation depth by using similarity analysis   总被引：1，自引：0，他引：1  

Shao-Quan Kou  Yi Huang  Xiang-Chun Tan  Per-Arne Lindqvist 《Engineering Geology》1998,49(3-4):261-269

This paper focuses on the indentation depth in rocks caused by a hemispherical indenter. The problem is approached by a combination of similarity methods with an artificial neural network. The similarity methods offer a profound understanding of the physical problem and help to identify the most important governing parameters or factors that reflect the essence of the rock indentation events, thus simplifying the target problem. The artificial neural network provides an advanced computing model, which allows more factors to be involved. The predictions obtained using this combined approach are in better agreement with the experimental results than predictions using other methods.  相似文献   

X射线荧光光谱法测定钒的原子价平均值   总被引：2，自引：1，他引：1  

孙伟莹  谭秉和 《岩矿测试》1998,17(3):193-196

用Ｘ射线荧光光谱法测定了一系列钒的氧化物混合物中Ｖ的Ｋβ谱线的精细结构,研究了钒的氧化物中Ｋβ谱峰参数随混合物平均原子价变化的规律,并利用所作的定标曲线对一些实际样品,如钒渣、磁铁矿中钒的平均原子价进行了定量测定。  相似文献   

确定南澜沧江缝合带的火山岩地球化学证据   总被引：9，自引：0，他引：9  

朱勤文  张双全  谭劲 《岩石矿物学杂志》1998,17(4):296-307

本文着重根据火山岩的主量元素、稀土元素和微量元素特征厘定了我国西南“三江”地区昌宁－孟连带Ｃ１—Ｐ２火山岩和南澜沧江带Ｐ—Ｔ３火山岩的构造－岩浆类型。昌宁－孟连火山岩带为洋脊／准洋脊型－洋岛型玄武岩、蛇绿混杂岩带,代表澜沧江洋或古特提斯的残迹;南澜沧江火山岩带是一个陆缘火山弧带,是澜沧江洋盆向东俯冲消减、碰撞以及陆内俯冲过程的产物。两带火山岩是成对分布的古特提斯缝合带的产物。  相似文献   

硅胶—TBP萃取层析连续分离和测定铁（Ⅲ）,铬（Ⅵ）的研究及应用   总被引：1，自引：1，他引：0  

谭龙华  潘建华 《矿物岩石》1998,18(4):103-105

研究以ＣＨＣｌ＝３ｍｏｌ／Ｌ作移动相,以硅胶球负荷的ＴＢＰ作固定相,反相萃取层析铁,铬,使与多种离子分离,留于柱上的铁,铬分别用ＣＨＣｌ＝０．８ｍｏｌ／Ｌ及水洗脱进行连续分离与测定,方法应用于矿物岩类复杂物质中铁,铬的连续分离与测定,简便,快速,准确。  相似文献   

基于日照时数的光合有效辐射估算方法研究     

卢伟萍  谭宗琨  刘志平  谢映  陈瑜琨 《气象研究与应用》2021,42(4):56-61

区域日序、时序光合有效辐射的准确估算是揭示区域农林产量、品质形成机理不可或缺的数据源.基于广西武鸣2018年10月1日至2020年3月31日地表太阳总辐射、光合有效辐射等观测数据,统计分析了日序及其各时次地表太阳总辐射、光合有效辐射曝辐量与其对应的日照的变化关系.结果 表明,日序及其各时次的晴空指数与其对应的日照百分率呈现二阶函数变化,而日序及其各时次的光合有效系数与其对应的晴空指数的自然对数呈现良好的线性变化关系,尤以农作物、林果等主要生长季的4-11月期间效果最佳.由此而构建的基于日照时数的日序及其时次光合有效辐射估算模型,对弥补农林产量、品质构成的光合作用影响机理研究等所需的基础数据源有非常重要意义.  相似文献