均一滑动模型与郯城地震断层的再研究

均一滑动模型与郯城地震断层的再研究杨一冲，高维明（中国北京１０００３６国家地震局分析预报中心）一、两种断层滑动模型与活断层分段的标准活断层分段是近期来活动构造学家尤为关注的问题，它在理论和实践上均具有举足轻重的作用。由于活断层分段的重要地位，美国地质...     

青藏高原远源西风粉尘与黄土堆积

青藏高原海拔4800m处28种大气微量与稀土元素的分析表明,采集的大气气溶胶粒子主要由高原局地粉尘(70％)和远源高空西风粉尘(25％)组成。结合中国沙漠数据,应用矿物粉尘的主组成元素Al,Fe,Mg和Sc建立的粉尘源区示踪系统分辨出:黄土高原中部末次冰期旋回风成黄土来自非中国沙漠的远源西风粉尘远小于近源沙漠的贡献。     

中国源区粉尘的元素示踪

中国北方沙漠12个地点大气气溶胶粒子中10种粉尘元素的浓度-粒度分布显示,沙漠粉尘是黄土高原风成黄土的源物质,粉尘在间冰期气候条件下的传输受控于正常的大气搬运过程,冰期黄土的堆积过程中尘暴的影响明显增强。基于4种粉尘元素(Al,Fe,Mg,Sc)的组配特征,发现中国粉尘的主要源区-中国北方沙漠存在3个可统计分辨的区域,即西北部沙漠、北部沙漠高粉尘区和北部沙漠低粉尘区。应用化学平衡模式,建立了中国源区粉尘的元素示踪系统。     

郯庐断裂带泗洪段全新世活动性初步研究

本文初步研究了郯庐断裂带泗洪孙牌坊区段全新世时期的活动性。利用地质剖面开挖、地质填图、取样分析、土氡测量等手段,获取了较多资料,证实了泗洪段全新世以来有活动。     

对施奈德等积多面体投影的研究

提出了先确定边界、再逐步精化的研究思路，系统、直观地阐述了投影的基本原理，并推导了严密的变换公式，在此基础上给出了详细算法和部分实验结果。     

Mass Concentration and Mineralogical Characteristics of Aerosol Particles Collected at Dunhuang During ACE-Asia

Measurements were performed in spring 2001 and 2002 to determine the characteristics of soil dust in the Chinese desert region of Dunhuang, one of the ground sites of the Asia-Pacific Regional Aerosol Characterization Experiment (ACE-Asia). The mean mass concentrations of total suspended particle matter during the spring of 2001 and 2002 were 317 μg m?3 and 307 μg m?3, respectively. Eleven dust storm events were observed with a mean aerosol concentration of 1095 μg m?3, while the non-dusty days with calm or weak wind speed had a background aerosol loading of 196 μgm?3 on average in the springtime. The main minerals detected in the aerosol samples by X-ray diffraction were illite, kaolinite, chlorite, quartz, feldspar, calcite and dolomite. Gypsum, halite and amphibole were also detected in a few samples. The mineralogical data also show that Asian dust is characterized by a kaolinite to chlorite (K/C) ratio lower than 1 whereas Saharan dust exhibits a K/C ratio larger than 2. Air mass back-trajectory analysis show that three families of pathways are associated with the aerosol particle transport to Dunhuang, but these have similar K/C ratios, which further demonstrates that the mineralogical characteristics of Asian dust are different from African dust.     

多年冻土区桩基础桥墩随机地震反应分析

将随机振动理论、粘弹性边界条件的二维波动法以及结构动力分析有限元法结合起来，考虑场地地震动为零均值的高斯平稳随机过程，对青藏铁路多年冻土区桩基础桥墩进行了随机地震反应分析，计算了9度地震作用下桥墩随机地震响应最大值的均值和均方差，分析了冻土层及桥墩高度对桥墩随机地震响应的影响。     

基于UC/OS-Ⅱ的UCGUI和LWIP资源整合的研究

介绍了针对实时内核UC/OS-Ⅱ的资源扩展,主要是UCGUI和LWIP的资源整合,探讨了两者在UC/OS-Ⅱ中的移植方法,丰富了UC/OS-Ⅱ的功能.     

江苏省沿长江工业走廊城市用地分析

从地貌、工程地质特征,分析江苏省沿长江工业走廊城市的用地条件。