呼图壁储气库土壤气地球化学特征及应力状态变化响应

地震与构造活动能够引起地下气体释放.地球内部的物理化学场变化、板块间的相互作用均会使得地下深部气体逸出.在地下应力的作用下,地壳会产生大量裂缝,为地下气体的释放提供通道,尤其是在地壳薄弱带,如断裂带、板块边界、火山等处,集中释放地下气体.因此,土壤中气体的浓度可能会因为地下应力的变化而改变.已有大量断裂带土壤气测量结果...     

浅谈新时期下的地震考古及在江淮地区的应用

随着中国经济建设的发展,大规模工程开挖,以及一些遗址、古墓等的抢救性挖掘,为地震考古提供了一个极好的工作平台.本文简要回顾了国内外地震考古的研究历史、现状、所取得的研究成果;对江淮地区的历史地震资料进行了分析整理,认为历史记录有较多的遗漏,应该充分利用地震考古学手段进行古地震事件的识别;总结了一些古地震事件识别的标志,为延长地震预测预报地震事件的时序资料提供参考,同时对考古手段在目前古地震、历史地震中的应用研究进行了分析和展望.     

卡拉麦里缝合带后碰撞背景与火山岩油气藏关系探讨

北疆地区卡拉麦里洋盆关闭后,两侧陆块处于松散拼贴状态,发育了陆间残余海盆,表明该缝合带是通过软碰撞作用形成的;后碰撞期,沿缝合带发育较大规模的火山活动。近年来的油气勘探表明,这些后碰撞火山岩中赋存了丰富的油气资源。本文对卡拉麦里缝合带多个火山岩油气藏的主要控制因素进行了分析,结果表明,卡拉麦里缝合带后碰撞期幔源岩浆底垫和火山活动有利地促进了该区烃源岩中有机质的热演化;后碰撞期的构造演化与石炭系烃源岩的分布、火山岩储集空间的形成和演化、油气盖层的发育等紧密相关,同时还通过断裂、不整合和反转构造等控制了油气的运移和保存,这些都为形成火山岩油气藏创造了有利条件。卡拉麦里缝合带火山岩油气藏具有良好的勘探前景,其中陆东—五彩湾地区火山岩油气藏主要位于石炭系顶面的风化壳内,滴南凸起中西部是最有利的地段,五彩湾凹陷残余构造高点也较为有利。     

CAS FGOALS-f3-L Large-ensemble Simulations for the CMIP6 Polar Amplification Model Intercomparison Project

Large-ensemble simulations of the atmosphere-only time-slice experiments for the Polar Amplification Model Intercomparison Project (PAMIP) were carried out by the model group of the Chinese Academy of Sciences (CAS) Flexible Global Ocean-Atmosphere-Land System (FGOALS-f3-L). Eight groups of experiments forced by different combinations of the sea surface temperature (SST) and sea ice concentration (SIC) for pre-industrial, present-day, and future conditions were performed and published. The time-lag method was used to generate the 100 ensemble members, with each member integrating from 1 April 2000 to 30 June 2001 and the first two months as the spin-up period. The basic model responses of the surface air temperature (SAT) and precipitation were documented. The results indicate that Arctic amplification is mainly caused by Arctic SIC forcing changes. The SAT responses to the Arctic SIC decrease alone show an obvious increase over high latitudes, which is similar to the results from the combined forcing of SST and SIC. However, the change in global precipitation is dominated by the changes in the global SST rather than SIC, partly because tropical precipitation is mainly driven by local SST changes. The uncertainty of the model responses was also investigated through the analysis of the large-ensemble members. The relative roles of SST and SIC, together with their combined influence on Arctic amplification, are also discussed. All of these model datasets will contribute to PAMIP multi-model analysis and improve the understanding of polar amplification.     

华北地震区地震活动特征及其危险性研究

分析了华北地震区历史和近代地震活动特征,得到该区1800年以来5．5级以上地震活动,在删除余震后接近泊松过程,并在此基础上估计了该区未来地震活动趋势;结果表明,2005年前该区发生6级和7级地震的概率分别为0．92和0．69;2010年前该区发生6级和7级地震的概率分别为0．99和0．75。     

国土资源移动执法监察管理信息系统设计与实现

在国土资源执法监察信息化建设的背景下,通过对市、县级国土资源执法监察业务的分析与梳理,构建了动态巡查和卫片执法监察的业务模型和业务流程,完成了移动执法监察管理信息系统的设计与开发。本文对系统的总体架构、系统功能、系统特点和应用情况作了简要介绍。     

Effects of Sodium Nitrate and Sodium Acetate Concentrations on the Growth and Fatty Acid Composition of Brachiomonas submarina

1　Introduction　Microalgae ,asthefirstlinkofmarinefoodchain ,canbeusedfortheaccumulationofpolyunsaturatedfattyacids (PUFAs) ,whichhavebeenshowntobeofmajorimportancenotonlyinthe preventionofhu man’sheartandcirculatorydiseases (DyerbergandJorgensen ,1982 ;Marcus ,1985 )butalsoinaquacul tureasincipientfeed (Sakamotoetal.,1998) .How ever ,thePUFA productivitiesbymicroalgaearelowincomparisonwithbacteriaandfungi.TherearetwopossiblewaysinpromotingthePUFA productionofmicroalgae.Oneistoobtaint…     

天线相位中心改正对GPS精密单点定位的影响

GPS卫星与接收机由于自身特性以及机械加工等原因,导致其质量中心与相位中心不重合而产生相位中心误差,进而对GPS精密单点定位产生一定影响。介绍GPS天线相位中心偏移(PCO)、变化(PCV)的原理,并分析PCO、PCV,以及不同模型改正对GPS精密单点定位的影响。结果表明,在GPS精密单点定位中,天线相位中心改正不容忽略:在平面方向上,天线相位中心改正对定位影响较小,仅为毫米级;在高程方向上,天线相位中心改正对定位影响较大,可达厘米级;与相对中心改正模型相比,绝对相位中心改正模型精度更高。     

大光斑激光雷达数据的森林冠层高度反演

针对传统的LM波形分解算法在GLAS大光斑波形数据处理中容易陷于局部最优解,限制了GLAS大光斑激光雷达数据在森林结构参数反演方面应用的问题,该文结合GLAS大光斑数据特征,引进优化后的EM算法对大光斑全波形数据进行分解,获取波形参数最优值。结合波形前缘长度和波形后缘长度,建立树高反演模型,并与LM分解算法建立的模型进行对比分析。研究结果表明,通过改进的EM算法对GLAS大光斑激光雷达数据进行处理,波形特征参数的获取更为精确,达到了较高的树高反演精度。     

The validation of the significant wave height product of HY-2 altimeter-primary results

The HY-2 satellite was successfully launched on 16 August 2011. The HY-2 significant wave height （SWH） is validated by the data from the South China Sea （SCS） field experiment, National Data Buoy Center （NDBC/ buoys and Jason-1/2 altimeters, and is corrected using a linear regression with in-situ measurements. Com- pared with NDBC SWH, the HY-2 SWH show a RMS of 0.36 m, which is similar to Jason- 1 and Jason-2 SWH with the RMS of 0.35 m and 0.37 m respectively; the RMS of corrected HY-2 SWH is 0.27 m, similar to 0.27 m and 0.23 m of corrected Jason-1 and Jason-2 SWH. Therefore the accuracy of HY-2 SWH products is close to that of Jason-1/2 SWH, and the linear regression function derived can improve the accuracy of HY-2 SWH products.