基于构造叠加晕方法的内蒙古金厂沟梁金矿36号脉深部矿体预测

文章以构造叠加晕理论为指导,对金厂沟梁金矿36号脉已有的勘探工程进行系统采样,化验分析Au、Ag、Cu、Pb、Zn、As、Sb、Hg、F、B、Ba、Bi、Mo、Mn、Co、Ni、W等元素含量,总结矿床元素组合、含矿构造中原生晕空间分布特征和矿床构造叠加晕特征,建立构造叠加晕盲矿预测模式及标志,在36号脉深部圈定2个盲矿...     

基于经验遗传-单纯形算法和结构模态参数识别结构物理参数的方法

对于复杂的大自由度系统的反演分析,遗传算法每步计算中包含大量的正演分析,成为限制遗传算法应用的运行速度的瓶颈。减少反演分析中的正演计算次数,是扩大遗传算法适用范围的有效途径。经验遗传-单纯形算法正是解决这一问题的一种有效方法。本文将这一方法应用于不完全模态参数已知条件下的结构物理参数识别研究。结果表明:本文建议的方法有精度和搜索效率高、对初值选取依赖性不强、可以反映"残缺"的高阶模态信息等优点。     

基于HHT的结构强震记录分析研究

本文利用HHT(Hilbert-HUang Transform)研究了结构强震记录的时频特性及结构动力特性。介绍了一座7层钢混框架结构及其强震观测台阵概况以及经历的地震情况,选择了在3次有代表性地震中的强震记录,利用一种新的非平稳信号处理方法HHT对记录进行了处理和分析,得到了该结构强震记录的时频幅值三维分布以及边际谱,并将边际谱与傅里叶谱进行了对比,识别了结构的自振频率。研究表明,对结构强震记录这种强非平稳信号,可以利用HHT分析得到能量集中分布的频段与时间范围。HHT边际谱与傅里叶谱相比,在低频部分幅值要大于傅里叶谱,而在高频部分,幅值要小于傅里叶谱。利用结构强震记录识别的自振频率比环境振动测试结果要小。     

Field reconnaissance of the 2007 Niigata-Chuetsu Oki earthquake

As part of the 2007 Tri-Center Field Mission to Japan, a reconnaissance team comprised of fourteen graduate students and three faculty members from three U.S. earthquake engineering research centers, namely, Multidisciplinary Center for Earthquake Engineering Research (MCEER), Mid-America Earthquake Center (MAE), and Pacifi c Earthquake Engineering Research Center (PEER), undertook a reconnaissance visit to the affected area shortly after the 2007 Niigata- Chuetsu Oki earthquake. This mission provided an opportunity to review the nature of the earthquake damage that occurred, as well as to assess the signifi cance of the damage from an educational perspective. This paper reports on the seismological characteristics of the earthquake, preliminary fi ndings of geotechnical and structural damage, and the causes of the observed failures or collapses. In addition, economic and socio-economic considerations and experiences to enhance earthquake resilience are presented.     

Robust H∞ control for aseismic structures With uncertainties in model parameters

This paper presents a robust H∞ output feedback control approach for structural systems with uncertainties in model parameters by using available acceleration measurements and proposes conditions for the existence of such a robust ontput feedback controller.The uncertainties of structural stiffness,damping and mass parameters are assumed to be norm-bounded.The proposed control approach is formulated within the framework of linear matrix inequalities,for which existing convex optimization techniques,such as the LMI toolbox in MATLAB,can be used effectively and conveniently.To illustrate the effectiveness of the proposed robust H∞ strategy,a six-story building was subjected both to the 1940 El Centro earthquake record and to a suddenly applied Kanai-Tajimi filtered white noise random excitation.The results show that the proposed robust H∞ controller provides satisfactory results with or without variation of the structural stiffness,damping and mass parameters.     

草鱼、鲢鱼和凡纳滨对虾多元化养殖系统结构优化的研究

采用陆基围隔实验法,开展了草鱼(Ctenopharyngodon idellus)、鲢鱼(Hypophthalmichthys molitrix)和凡纳滨对虾(Litopenaeus vannamei)三元混养结构优化的初步研究。实验于2009年5～10月进行,每月定期采样,分别测定了各混养系统水质和底质的变化、养殖生物的成活率和养殖产量,分析了各混养系统的饲料转化效率、氮磷利用率及产出投入比。实验结果初步表明,草鱼放养密度为0.77尾/m2时,既可以保证出池规格(>1 100 g/尾)又不影响收获产量(>8 400 kg/hm2),同时饲料转化效率(>52%)及氮磷利用率(N>30%,P>14%)也较高;鲢鱼放养密度为0.23尾/m2或0.45尾/m2,可以起到调节水质的作用;对虾放养密度越大(48.9尾/m2),底质被污染程度越小。在本实验条件下,最佳的混养模式:草鱼与鲢鱼混养比例为草鱼0.77尾/m2鲢鱼0.45尾/m2;草鱼、鲢鱼和对虾混养比例为草鱼0.77尾/m2鲢鱼0.23尾/m2凡纳滨对虾16.3尾/m2。     

川东石炭系地层—构造复合圈闭控制因素及有利区研究

根据川东石炭系实钻资料,结合前人资料对石炭系地层—构造复合圈闭进行了分类和总结;在此基础上,对川东石炭系地层—构造复合圈闭的控制因素进行了研究。研究表明沉积相是地层—构造复合圈闭的次要控制因素,而古岩溶、古构造是其主要控制因素;在此过程中,根据黄龙纽残余厚度分布状况提供的岩溶剥蚀强度信息、经压实恢复上覆梁山组碳质泥岩等厚度图反映的黄龙组顶面侵蚀地形变化印模及由岩溶相组合特征所显示的古水文条件,恢复了川东地区黄龙组古岩溶地貌。在分析古岩溶地貌单元古水文状况、溶蚀方式和强度、古构造及古岩溶厚度的基础上,对川东内古岩溶进行了区块划分。最后综合了各种资料,对川东石炭系地层—构造复合圈闭有利区带进行了预测。     

潜堤结构型式及其透射系数研究

针对胜利油田某保滩促淤工程，进行了多种方案不同潜堤结构型式的优选，比较了其中四种结构型式，并对这四种结构型式的潜堤分别进行了波浪水槽试验，测试其透射系数，在此基础上，给出了计算潜堤透射系数的经验公式，为工程设计提供依据。     

Evolutionary model of free economic zones

Free economic zone (FEZ) has a long history and plays a more and more important role in the world economy. Most studies, however, focused on the theoretical analysis of benefit and cost as well as the economic role of FEZ in the less developed countries and little attention has been paid to the evolution of FEZ. This paper will improve the above-mentioned studies and put forward the structural and spatial evolutionary model of FEZ by analyzing the development of objectives, preferential policy, governance structure, industrial sectors and location of FEZs based on the international economic and political development. FEZs develop towards: 1) more comprehensive and macro objectives, 2) more industry-oriented and multi-preferential policies, 3) more cross-national and combination zones with administrative areas, 4) more technology-intensive and multi-industries, 5) more flexible location and larger spatial dimensions, 6) more rapid evolution and typologies, and 7) more economic integration to the host economy. Biography: MENG Guang-wen (1960–), male, a native of Tianjin of China, Ph.D., specialized in regional planning and policy, environmental planning, tourist planning and management. E-mail: gwmeng98@hotmail.com     

台湾海峡滨海断裂带的构造特征与活动性

根据台湾海峡滨海断裂带活动断裂调查得到的海底地形、重力、地磁和多道地震探测资料,对滨海断裂带的构造特征与活动性进行了研究。该断裂带总体呈NE向分布,东北端起自牛山岛以东海域,西南端止于兄弟屿以东海域,大体沿50～60m等深线展布,全长约500km,是华南大陆与台湾海峡海盆的分界断裂;断层面近于直立,切穿地壳;在主压应力轴为NWWSEE方向的应力场作用下,断裂以右旋走滑为主,兼逆冲性质;断裂带两侧地形反差大,最新活动性强,控制着两侧新生代地层的沉积,;断裂带上地震活动频繁,是福建沿海地震活动最活跃的断裂带。