伸缩仪台站维护管理要点分析     

袁曲  张辉  黄仲  王慧 《大地测量与地球动力学》2007,27(Z1):156-158

总结了宜昌地震台SS-Y伸缩仪在安装、调试、维护、管理等方面的经验.  相似文献   

INTEGRAL/XMM views on the MeV source GRO J1411-64     

Diego F. Torres  Shu Zhang  Olaf Reimer  Xavier Barcons  Amalia Corral  Valentí Bosch-Ramon  Josep M. Paredes  Gustavo E. Romero  Jin Qu  Werner Collmar  Volker Schönfelder  Yousaf Butt 《Astrophysics and Space Science》2007,309(1-4):17-21

The COMPTEL unidentified source GRO J 1411-64 was observed by INTEGRAL and XMM-Newton in 2005. The Circinus Galaxy is the only source detected within the 4σ location error of GRO J1411-64, but in here excluded as the possible counterpart. At soft X-rays, 22 reliable and statistically significant sources (likelihood >10) were extracted and analyzed from XMM-Newton data. Only one of these sources, XMMU J141255.6-635932, is spectrally compatible with GRO J1411-64 although the fact the soft X-ray observations do not cover the full extent of the COMPTEL source position uncertainty make an association hard to quantify and thus risky. At the best location of the source, detections at hard X-rays show only upper limits, which, together with MeV results obtained by COMPTEL suggest the existence of a peak in power output located somewhere between 300–700 keV for the so-called low state. Such a spectrum resembles those in blazars or microquasars, and might suggest at work by the models accordingly. However, an analysis using a microquasar model consisting on a magnetized conical jet filled with relativistic electrons, shows that it is hard to comply with all observational constrains. This fact and the non-detection at hard X-rays introduce an a-posteriori question mark upon the physical reality of this source, what is discussed here.  相似文献   

吉尔吉斯斯坦布丘克造山型金矿床：来自流体包裹体、H- O- S同位素证据     

史鹏亮  屈海浪  鄂建新  刘春发  缪广  马麒镒  戴毅 《地质学报》2023,97(3):738-752

吉尔吉斯斯坦北天山构造带的矿床学数据缺乏,制约了天山造山带境内外成矿对比。布丘克金矿床位于吉尔吉斯斯坦北天山构造带中部。金矿体为石英复脉,呈带状发育于NWW向韧性剪切带中。矿体倾向SSW,倾角60°～70°,赋矿围岩主要为侵入于早古生代变质碎屑杂岩中的正长斑岩。布丘克金矿床成矿期石英流体包裹体观察、石英H-O同位素、硫化物S同位素测试结果显示,布丘克金矿床石英脉中包裹体大小集中在2～10μm之间,类型以H₂O-CO₂型、富CO₂型、水溶液型包裹体为主,成分以富CO₂、含CH₄为特征。成矿流体具有中温(200～320℃)、低盐度(3%～7%NaCl_eqv)特征;石英δD_V-SMOW值介于-108.1‰～-90.2‰之间,δ¹⁸O_流体值介于4.86‰～9.26‰之间;黄铁矿δ³⁴S分布在0‰左右(-0.9‰～1.6‰)。综合本文数据、矿床地质特征、区域地质资料,本文认为布丘...  相似文献   

Mass motion in upper solar chromosphere detected from solar eclipse observation     

Zhi Li  Zhongquan Qu  Xiaoli Yan  Guangtao Dun  Liang Chang 《Astrophysics and Space Science》2016,361(5):159

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基于高速公路气象监测数据分析的浓雾预报指标     

赵娜  孟宪罗  马翠平  曲晓黎  张金满 《气象科技》2015,43(1):145-150

利用京秦高速公路沿线交通气象监测站实况资料,通过对84个站次的浓雾雾生和雾消各气象要素变化特征进行分析,归纳出高速公路沿线浓雾和强浓雾天气雾生雾消的预报指标。爆发性强浓雾期间能见度少波动,在能见度爆发下降前,温度下降过程中的小幅上升对能见度突然下降有很好的指示作用;相对湿度在能见度爆发下降前1 h内达到80%以上。一般性强浓雾大多数出现在温度波动之后继续直线下降期间;在500 m浓雾出现15 h之前空气相对湿度达90%以上,能见度达50 m之前相对湿度基本达饱和状态。浓雾消散主要有两个方面,因冷空气造成的雾消,预报应着眼于冷空气前锋影响高速公路所在区域的时间;而由辐射升温造成的雾消,预报应着眼于对天空状况和升温速度的判断。  相似文献   

Equatorward shift of the South Asian high in response to anthropogenic forcing   总被引：1，自引：0，他引：1  

Xia Qu  Gang Huang  Kaiming Hu  Shang-Ping Xie  Yan Du  Xiao-Tong Zheng  Lin Liu 《Theoretical and Applied Climatology》2015,119(1-2):113-122

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Changes in the characteristics of precipitation over northern Eurasia     

Guanhuan Wen  Gang Huang  Kaiming Hu  Xia Qu  Weichen Tao  Hainan Gong 《Theoretical and Applied Climatology》2015,119(3-4):653-665

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孟加拉湾超级风暴费林对西藏强降水的影响分析     

德庆  徐珺  宗志平  赤曲  罗布坚参  代华光 《气象》2015,41(9):1086-1094

利用NCEP/NCAR(2.5°×2.5°)再分析资料和常规、非常规观测资料,通过环境场和中尺度特征较全面细致地分析了孟加拉湾风暴费林（Phailin）对西藏特大暴雪的影响。研究表明：“费林”对强降水的影响主要是登陆减弱为低压后,低压云系分两个阶段形成三个中尺度对流云团,对流云团在南支槽的作用下上高原。而强降水的发生和南风风速的大小有直接的对应关系,西南低空急流建立后西藏南部才出现强降水,而低空急流的建立是靠南支槽的贡献。南风风速和强降水的这一重要关系为此类天气提供了预报着眼点。  相似文献   

High-pressure granulite from Western Kunlun,northwestern China: Its metamorphic evolution,zircon SHRIMP U-Pb ages and tectonic implication   总被引：1，自引：0，他引：1  

QU JunFeng  ZHANG LiFei  AI YongLiang  L Zeng  WANG JianPing  ZHOU Hui & WANG ShiYan MOE Key Laboratory of Orogenic Belts  Crustal Evolution  School of Earth  Space Science  Peking University  Beijing  China  Henan Polytechnic University  Jiaozuo  China  Geological Survey of Henan Province  Zhengzhou  China 《中国科学D辑(英文版)》2007,50(7):961-971

High-pressure mafic granulites occurring as lenticular bodies within garnet-amphibolites in Kangxiwar Fault have been first reported in this paper. The P-T conditions of two metamorphic stages were ob-tained using calibrated geothermal barometers and ThermoCalc Program. The peak metamorphic con-dition of these high-pressure granulites is about 760―820℃,1.0―1.2 GPa and the retrograde meta-morphic condition is about 620―720℃,0.7―0.8 GPa. The petrological studies show that they have a near-isobaric cooling P-T...  相似文献   

沈阳长白乡-观音阁断裂、抚顺浑河断裂的定位和活动性研究   总被引：3，自引：0，他引：3  

雷清清  王超  赵晓辉  曲乐 《震灾防御技术》2007,2(2):128-136

本文基于对沈阳长白乡-观音阁断裂,以及抚顺浑河断裂开展的1:10000地质地貌填图工作,获得了这两条断裂在最老第四纪地层热释光的测年结果,它们分别为(112±6.7)ka和(150±9.0)ka。长白乡-观音阁断裂为一沿丘陵山地前缘分布的断裂,由2—3条分支断裂组成,最新的断面活动显示为压扭性正断层性质。断裂在晚更新世坡洪积扇堆积形成以来没有活动显示。3条浅层人工地震测线探测结果表明,其上断点均未错断第四系上更新统底界。断裂为中更新世活动断裂,晚更新世以来没有活动。浑河断裂为一沿丘陵山地前缘分布的断裂,由3—4条分支断裂组成,最新的断面活动显示为压扭性正断层性质。断裂在晚更新世坡洪积扇堆积形成以来没有活动显示。5条浅层人工地震测线探测结果表明,其上断点均在第四系上更新统底界以下。断裂为中更新世活动断裂,晚更新世以来没有活动。  相似文献