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Accelerating POCS interpolation of 3D irregular seismic data with Graphics Processing Units

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Accelerating POCS interpolation of 3D irregular seismic data...

中国科学院地质与地球物理研究所第十届(2010年度)学术年会

作者： Shu-Qin Wang~(a,b),Xing Gao~(c,d,*),Zhen-Xing Yao~a a Institute of geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,china b Institute of Information Engineering,Minzu university of china,Beijing 100081,china c Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100085,china d State key Lab of Resources and environmental Information System,Institute of Geographic Sciences and Natural Resources Research,Chinese Academy of Sciences, Beijing 100101,china

Seismic trace interpolation is necessary for high-resolution imaging when the acquired data are not adequate or when some traces are ***-onto-convex-sets(POCS)interpolation can gradually recover missing traces with an iterative algorithm,but its computational cost in a 3D CPU-based implementation is too high for practical *** present a computing scheme to speedup 3D POCS interpolation with graphics processing units(GPUs).We accelerate the most time-consuming part of the 3D POCS algorithm(*** transforms)by taking advantage of a GPU-based Fourier transform *** parts are fine-tuned to maximize the utilization of GPU computing *** upload the whole input data set to the global memory of the GPUs and reuse it until the final result is *** can avoid low-bandwidth data transfer between CPU and GPUs. We minimize the number of intermediate 3D arrays to save GPU global memory by optimizing the algorithm *** allows us to handle a much larger input data *** reducing the runtime of our GPU implementation,the coalescing of global memory access and the 3D CUFFT library provides us with the greatest performance *** results show that our scheme is 3-29 x times faster than the optimized CPU-based implementation,depending on the size of 3D data *** GPU computing scheme allows a significant reduction of computational cost and would facilitate 3D POCS interpolation for practical applications.

关键词： POCS Graphics processing unit Irregular seismic data Interpolation Fourier transform

Research on the relationship between site function and environment at the site of Zhongba,Chongqing City,china

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Chinese Science Bulletin 2008年第S1期53卷 58-73页

作者： SUN ZhiBin Institute of Cultural Relics and Archaeology of Sichuan Province,Chengdu 610041,china 1. Institute of Cultural Relics and Archaeology of Sichuan Province Chengdu 610041 China

The Zhongba site has been demonstrated to be a location of salt production based on multi-disciplinary research including salt archaeology,environmental archaeology,zooarchaeology,paleobotany,and other natural science *** continuity of salt production from the Han Dynasty to the present day as understood primarily from ancient texts can now be traced back to even earlier times. Based on the characteristics of cultural layer deposits,features,and artifacts,Zhongba can be clearly distinguished from known settlements,and from bronze,iron,pottery and porcelain *** to various natural science examinations,the major impurities in local salt brine are also found in floor features,brine troughs,and rounded bottom pots at the site even though NaCl itself was not *** traces were left over from the salt production process rather than being naturally *** and its constituent features and artifacts share many common characters with other salt production sites around the ***,the Zhongba site can be confidently identified as a salt production site where activity continued for several thousand *** formation of the site cannot be separated from salt production,and it is also highly related to its natural environment.

关键词： Zhongba site function salt production environmental relationships

Extinction pattern of reef ecosystems in latest Permian

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Extinction pattern of reef ecosystems in latest Permian

中国科学院地质与地球物理研究所2007学术年会

作者： WU YaSheng~(1+),FAN JiaSong~1,JIANG HongXia~1 & YANG Wan~2 1 Institute of geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,china 2 Department of geology,Wichita State university,1845 Fairmount,Wichita,KS 67260,USA

Studies of two Permian-Triasslc boundary(PTB) sections on top of a Changhsingian reef in Ziyun, Guizhou Province,southwestern china indicate that the end-Permian mass extinction of reef ecosystems occurred in two *** first step is the extinction of all stenotropic organisms such as calcisponges and fusulinids in the latest Permian(in the Clarkina yini conodont zone).The biota after the first extinction is simple,comprising eurytropic organisms including microgastropods,ostracods,and some small burrowing organisms,or only algal *** the beginning of the Early Triassic(*** beginning of the Hindeodus parvus zone),the environments became anoxic,and the microgastropod dominated biota or algal mats disappeared,which constituted the second episode of the mass extinction. The biota after the second extinction comprises small spherical microproblematica,some kinds of specialized organisms tolerant of anoxic or oxygen-poor *** the environments became oxygenated,the specialized biota was replaced by a microgastropod-dominated simple *** the environmental conditions improved further,the simple biota was replaced by a diverse biota with normal -sized ammonoids,bivalves,and gastropods,representing restoration of normal oceanic conditions. Comparison with PTB sections in Dolomites,Italy and Meishan,Zhejiang Province shows that non-reef ecosystems had a similar first episode of mass extinction in the latest *** the case that oceanic anoxia happened,non-reef ecosystems had a second extinction episode similar to that of reef ecosystems.

关键词： end-Permian reef mass extinction Guizhou Permian-Triassic boundary

基于南黄海盆地海相油气的海洋立体宽线地震勘探技术设想

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海洋地质前沿 2012年第8期28卷 56-60页

作者：吴志强肖国林董贺平刘怀山童思友国土资源部海洋油气资源与环境地质重点实验室青岛266071 青岛海洋地质研究所青岛266071 中国海洋大学海洋地球科学学院青岛266036

南黄海盆地中—古生代海相碳酸盐岩具有良好的油气前景,由于埋藏深、厚度大、构造复杂等特殊地震地质条件的原因,地震原始资料品质差,严重地制约了勘探进程。综合常规宽线和上下缆勘探技术的优势,提出了海洋立体宽线(MTBL)地震勘探新技... 详细信息

南黄海盆地中—古生代海相碳酸盐岩具有良好的油气前景,由于埋藏深、厚度大、构造复杂等特殊地震地质条件的原因,地震原始资料品质差,严重地制约了勘探进程。综合常规宽线和上下缆勘探技术的优势,提出了海洋立体宽线(MTBL)地震勘探新技术设想,对其改善地震资料品质的作用和优势进行了分析,为南黄海海相油气地震的勘探工作者提供了参考。

关键词：南黄海海相油气海洋立体宽线

关中地区不同耕作历史土壤的微形态特征及对比研究

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土壤通报 2009年第3期40卷 476-481页

作者：庞奖励张卫青黄春长张旭查小春陕西师范大学旅游与环境学院陕西西安710062 中国科学院地球环境研究所黄土与第四纪地质国家重点实验室陕西西安710075

用显微镜和Qwin软件对关中地区不同耕作历史土壤A和B的微形态进行了观察和定量分析.结果表明:耕作土壤具有Ap-(BC)-C构造;不同土壤粗颗粒主要由石英和长石组成,但不同矿物间的比例、颗粒形态、C/F(10μm)值等有明显差异.耕作历史和方式... 详细信息

用显微镜和Qwin软件对关中地区不同耕作历史土壤A和B的微形态进行了观察和定量分析.结果表明:耕作土壤具有Ap-(BC)-C构造;不同土壤粗颗粒主要由石英和长石组成,但不同矿物间的比例、颗粒形态、C/F(10μm)值等有明显差异.耕作历史和方式对矿物组合影响不明显,但对颗粒形态有显著的影响,耕作时间愈长,颗粒的长度、等圆直径、周长和面积减小和圆度增加愈明显。

关键词：土壤微形态耕作历史关中地区

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西安黄绵土碳释放规律研究

土壤 2004年第4期36卷 398-404,411页

作者：张晓龙赵景波马润花中国海洋大学环境科学与工程学院山东青岛266003 陕西师范大学旅游与环境学院山东烟台师范学院地理系山东烟台264025

采用碱溶液吸收法。1999 年 9 月～2001 年 8 月 2 年的观测资料显示,西安黄绵土 CO2释放与前人在其他地区的研究不同,表现为白昼释放量低于夜间。西安土壤 CO2释放量的日变化从当日清晨至次日晨,呈现由高变低再变高的变化规律。土壤 CO... 详细信息

采用碱溶液吸收法。1999 年 9 月～2001 年 8 月 2 年的观测资料显示,西安黄绵土 CO2释放与前人在其他地区的研究不同,表现为白昼释放量低于夜间。西安土壤 CO2释放量的日变化从当日清晨至次日晨,呈现由高变低再变高的变化规律。土壤 CO2释放量的变化趋势大体与温度的变化一致,但在时间上有一定的滞后性。随着季节的变化,西安黄绵土 CO2释放量有明显的增减,夏季日释放量最多,秋季次之,冬季最少。不同植被条件下,土壤 CO2 释放量有差异。一般说来,裸地有较高的释放量,林地和草地释放量较低。裸露地表土壤 CO2的释放量变化较大,地表覆盖良好,CO2释放较为稳定。

关键词：黄绵土土壤CO2 释放量变化规律西安

Modern pollen distributions in Qinghai-Tibetan Plateau and the development of transfer functions for reconstructing Holocene environmental changes

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Modern pollen distributions in Qinghai-Tibetan Plateau and t...

中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： Houyuan Lu~(a,*),Naiqin Wu~a,Kam-biu Liu~b,Liping Zhu~c,Xiangdong Yang~d,Tandong Yao~c,Luo Wang~a, Quan Li~a,Xingqi Liu~d,Caiming Shen~e,Xiaoqiang Li~f,Guobang Tong~g,Hui Jiang~h akey laboratory of Cenozoic geology and Environment,Institute of geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,china b Department of Oceanography and Coastal Sciences,Louisiana State university,Baton Rouge,LA 70803,USA cInstitute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100085,china d State key laboratory of Lake Science and Environment,Nanjing Institute of Limnology and Geography,Chinese Academy of Sciences,Nanjing 210008,china e Atmospheric Sciences Research Center,State university of New York,Albany,NY 12203,USA f Institute of Vertebrate Paleontology and Paleoanthropology,Chinese Academy of Sciences,Beijing 100044,china g Institute of Hydrology and geology,Chinese Academy of Geological Sciences,Zhengding 050803,china h State key laboratory of Estuarine and Coastal Research,East china Normal university,Shanghai 200062,china

This study investigates the distribution of modern pollen assemblages in the Qjnghai-Tibetan Plateau, china,based on surface soil samples collected at 1202 sites along an altitudinal gradient of 10 -5500 m asl,where mean annual precipitation(MAP) ranges from 12 to 1840 mm and mean annual temperature(MAT) from -1 to 21.5℃.A total of 153 pollen taxa were found with relative abundances greater than 1%in at least two *** correspondence analysis(CCA) was used to determine the main environmental variables influencing pollen *** results reveal that MAP is the most significant dominant ***,MAT,altitude(ALT),July temperature(MT7),and relative humidity(HHH) are also significant variables that clearly follow the gradients in the CCA ordination, suggesting that pollen assemblages probably not only reflect a single climatic parameter,but also a variety of other climatic inter-related parameters. Transfer functions,based on locally weighted weighted averaging(LWWA),were developed for MAP (R-boot = 0.89,RMSEP = 109 mm),MAT(R-boot = *** = 2.3℃),ALT(R-boot = 0.73, RMSEP = 597 m),HHH(R-boot = 0.82,RMSEP = 4.5%),and July mean precipitation(MP7)(R- boot = 0.87,RMSEP = 23 ram).Overall,our results confirm that pollen can provide reliable estimates of the primary climatic *** application of the LWWA model to the fossil records of Chen Co Lake allowed quantitative inferences to be made about Holocene climatic changes in the southern Tibetan Plateau,suggesting that LWWA is a robust calibration method for quantitative palaeo-environ-mental reconstruction based on pollen data in the regions.

关键词： Qinghai-Tibetan plateau Vegetation Pollen Transfer functions Holocene Climatic changes

Effect of regional land subsidence on engineering structures:a case study of the 6 km long Su-tong Yantze River Bridge

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Effect of regional land subsidence on engineering structures...

中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： F.S.Ma·Y.S.Yang·R.M.Yuan·B.K.Yao J.Guo key laboratory of Engineering Geomechanics,Institute of geology and Geophysics,Chinese Academy of Sciences, Beijing 100029,People’s Republic of china College of Environment and Resources,Jilin university, Changchun 130026,People’s Republic of china School of Earth Ocean and Planetary Sciences, Cardiff university,Cardiff CF10 3YE,UK National Center for Active Fault studies,Institute of geology, china Earthquake Administration,Beijing 100029, People’s Republic of china Institute of Geological Survey of Jiangsu Province, Nanjing 210018,People’s Republic of china

The article reports a study of the influence of regional land subsidence on the 6.05 km long Su-tong Yangtze River *** characteristics of the major compressive geological layers and their potential to settlement are discussed in the light of the past and continuing groundwater exploitation in the area.A numerical model for land subsidence quantification was developed and used to predict the differential settlements along the bridge axis to *** is a significant difference in the settlement occurring in the north and south areas of the bridge,in part due to the variation in the Quaternary alluvial sediments. The case study highlights the importance of considering both site specific and regional subsidence conditions when designing large structures in such an area.

关键词： Land subsidence environmental risk Overexploitation Highway bridge Su-Xi-Chang area

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论青藏铁路修筑中的冻土环境保护问题

水文地质工程地质 2002年第4期29卷 14-16,20页

作者：吴青柏施斌南京大学地球科学系地球环境计算工程研究所

本文通过研究已建青藏公路修筑过程中寒区冻土环境和生态环境的破坏特征 ,分析总结了寒区环境破坏对公路工程的影响。青藏公路工程修建活动极大地改变了冻土环境 ,使得多年冻土退化 ,上限加深 ,诱发了一系列冻胀、融沉、热融滑塌等冻融... 详细信息

本文通过研究已建青藏公路修筑过程中寒区冻土环境和生态环境的破坏特征 ,分析总结了寒区环境破坏对公路工程的影响。青藏公路工程修建活动极大地改变了冻土环境 ,使得多年冻土退化 ,上限加深 ,诱发了一系列冻胀、融沉、热融滑塌等冻融灾害 ,使得生态环境原本就很脆弱的寒区环境更加恶化 ,如植被退化、荒漠化等 ,同时 ,冻土环境的破坏也使得工程环境恶化 ,直接影响青藏公路正常交通运输。因此 ,在即将进行的青藏铁路修筑工程中 ,必须深入研究其对冻土环境的影响 ,对冻土环境问题和环境保护应予以足够的重视。

关键词：青藏铁路冻土环境冻融灾害荒漠化冻胀融沉植被退化