Fractal and chaotic laws on seismic dissipated energy in an energy system of engineering structures     

崔玉红  聂永安  严宗达  吴国有 《地震学报(英文版)》1998,11(5):573-581

ＩｎｔｒｏｄｕｃｔｉｏｎＯｗｉｎｇｔｏｔｈｅｄｅｖｅｌｏｐｍｅｎｔｏｆｎｏｎｌｉｎｅａｒｓｃｉｅｎｃｅｓｓｕｃｈａｓｆｒａｃｔａｌｄｙｎａｍｉｃｓ,ｃｈａｏｔｉｃｄｙｎａｍｉｃｓ,ｓｙｎｅｒｇｅｔｉｃｓｓｃｉｅｎｃｅａｎｄｏｔｈｅｒｓｃｉｅｎｃｅｉｎ...  相似文献   

The Role of Ozone Depletion in the Lack of Cooling in the Antarctic Upper Stratosphere during Austral Winter     

Xuan MA  Lei WANG 《大气科学进展》2023,40(4):619-633

Temperature trends in the upper stratosphere are investigated using satellite measurements from Stratospheric Sounding Unit(SSU) outputs and simulations from chemistry–climate models(CCMs) and the Coupled Model Intercomparison Project Phase 6(CMIP6). Observational evidence shows a lack of cooling in the Antarctic, in contrast to strong cooling at other latitudes, during austral winter over 1979–97. Analysis of CCM simulations for a longer period of1961–97 also shows a significant contrast in the...  相似文献   

多级模糊综合评判在地震综合预报中的应用     

李文英  吴国有 《地震》1990,(1):59-65

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中国石油油气勘探面临的形势与陆上油气资源战略选区的五大领域     

吴国干  门相勇  李小地  曾少华 《地质通报》2006,(Z2)

从油气公司的角度阐述了开展全国油气资源战略选区调查与评价工作的必要性和重要意义。分析了中国石油天然气股份有限公司油气勘探面临的形势,指出未来陆上油气资源战略选区主要有五大领域:前陆盆地、叠合盆地中下组合、青藏高原、中小型盆地和非常规油气。这几个勘探领域都有良好的资源条件,具有多个战略目标及较好的勘探前景。建议战略选区项目工作要遵循四大原则:战略性、前瞻性、基础性和风险性。  相似文献   

VEGETATION MAPPING USING REMOTE SENSING AND GIS     

Wu Bingfang  huang Xuan  Tian Zhigang 《地理学报(英文版)》1994,(Z2)

I.StduyAreaPUschRjdgeoftheSantaCatalinaMountains,CoronadONaionalForest,SoutheastArizona,wasselectedasastudyareafOrvegetationmopingandatestoftheroleOfGISinaidingrem0teIysenseddataclassificati0n.BeinganepitOmeoftheSantaCatalinaMountains,PUscllmdgeiscomprisedOf23O.65sqUarelQnoflandIocatedonthesouthwesternPOrti0noftheSantaCarelinaRangerDistrictOftheCoronadoNationalForest.ltprovidesasharPcontrastbebeenthenamralruggdnessOftheSantaCatalinaMountainsandtheCityOfTucson,Arizona,araPdl…  相似文献   

Trace Element and Sulfur Isotope Compositions of Gold-bearing Pyrite from the Zhangjiawa Iron Skarn Deposit,Laiwu District: Implications for Sources of Early Cretaceous Gold Mineralization in the North China Craton     

DUAN Zhuang  FU Yangang  LI Chunji  ZHAO Shaorui  GAO Mingbo  GAO Jilei  JIN Lijie  LI Siyuan  NGO Dac Xuan 《《地质学报》英文版》2021,95(5):1771-1774

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Early Evolution of Marine Planktonic and Nektonic Ecosystems:Questions and Chinese Approaches     

ZHANG Yuandong  ZHANG Junpeng  YAN Kui  FANG Xiang  LI Wenjie  MA Xuan  WU Xuejin 《《地质学报》英文版》2019,93(Z1):169-172

正The originations of marine planktons and nektons are significantly delayed than that of benthos,as evidenced by the fossil record.The Cambrian Explosion produced a variety of high-level marine organisms,and many remarkablebody-plans.However,a majority of these organisms are benthic or level-bottomed,and are rather dependent on the substrates of sea floors.This conclusion holds even with the giant predator  相似文献   

南海表层沉积沟鞭藻孢囊的分布特征   总被引：4，自引：0，他引：4  

吴国Xuan  孙湘君 《热带海洋》2000,19(1):8-16,T001

为研究沟鞭藻孢囊含量和组合的分布规律,分析了南少上位的表层沉积样品。共鉴定得沟鞭藻孢囊１６属２７种,孢囊含量变化在８至９２５粒．ｇ＾－１之间。研究区北部及靠近巴士海峡的样品孢囊含量较高,而南海南部的样品孢囊含量较低。孢囊含量的这一分布型式与南海表层水中浮游植物的分布特征具有一致性,似受表层海水营养因素控制。Ｓｐｉｎｉｆｅｒｉｔｅｓ是沟鞭藻孢囊组合的优势组分,主要有Ｓ．ｒａｍｏｓｕｓ,Ｓ．ｈｙｐｅｒ  相似文献   

Comparison between ozonesonde measurements and satellite retrievals over Beijing,China          下载免费PDF全文

Jinqiang Zhang  Yuejian Xuan  Jianchun Bian  Holger V?mel  Yunshu Zeng  Zhixuan Bai  Dan Li  Hongbin Chen 《大气和海洋科学快报》2024,(1):16-22

从2013年开始,作者团队使用自主研发电化学原理臭氧探空仪在华北平原北京地区进行每周一次观测.本研究首次使用2013-2019年期间北京地区臭氧探空数据评估Aqua卫星搭载大气红外探测仪(AIRS)和Aura卫星搭载微波临边探测器(MLS)反演垂直臭氧廓线,并对比臭氧探空,AIRS和Aura卫星搭载臭氧监测仪(OMI)臭氧柱总量结果.尽管臭氧探空与卫星反演垂直臭氧廓线在局部高度处差异较大,但整体来说两者较为接近(相对偏差大多<10%).臭氧探空,AIRS和OMI三种仪器测量臭氧柱总量的年变化特征较为一致,其年均臭氧柱总量分别为351.8±18.4 DU,348.8±19.5 DU和336.9±14.2 DU.后续对国内多站点观测数据分析将有助于进一步理解臭氧探空与卫星反演臭氧资料在不同区域的一致性.  相似文献   

K-Ar Dating of Fault Gouges from the Red River Fault Zone of Vietnam   总被引：1，自引：0，他引：1  

BUI Hoang B  NGO Xuan Thanh  Yungoo SONG  Tetsumaru ITAYA  Koshi YAGI  KHUONG The Hung  NGUYEN Tien Dung 《《地质学报》英文版》2016,90(5):1653-1663

Constraining the timing of fault zone formation is fundamentally important in terms of geotectonics to understand structural evolution and brittle fault processes.This paper presents the first authigenic illite K-Ar age data from fault gouge samples collected from the Red River Shear Zone at Lao Cai province,Vietnam.The fault gouge samples were separated into three grain-size fractions(0.1 μm,0.1-0.4 μm and 0.4-1.0 μm).The results show that the K-Ar age values decrease from coarser to finer grain fractions(24.1 to 19.2 Ma),suggesting enrichment in finer fraction of morerecently grown authigenic illites.The timing of the fault movement are the lower intercept ages at 0%detrital illite(19.2 ± 0.92 Ma and 19.4 ± 0.49 Ma).In combination with previous geochronological data,this result indicates that the metamorphism of the Day Nui Con Voi(DNCV) metamorphic complex took place before ca.26.8 Ma.At about 26.8 Ma-25 Ma,the fault strongly acted to cause the rapid exhumation of the rocks along the Red River-Ailoa Shan Fault Zone(RR-ASFZ).During brittle deformation,the DNCV slowly uplifted,implying weak movement of the fault.This brittle deformation might have lasted for ca.5 Ma.  相似文献