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Water geochemistry of the Xijiang basin rivers,South china:Chemical weathering and CO2.consumption

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Water geochemistry of the Xijiang basin rivers,South China:C...

中国科学院地质与地球物理研究所第十届(2.10年度)学术年会

作者： Zhifang Xu~(a,*),Cong-Qiang Liu~b a Key Laboratory of Engineering Geomechanics,institute of geology and {2.,chinese academy of Sciences,beijing 10002.,china b State Key Laboratory of Environmental Geochemistry,institute of Geochemistry,chinese academy of Sciences,Guiyang,Guizhou 550002.china

The Xijiang River,the mainstream of the Zhujiang(Pearl)River,which is the second largest river in china in terms of discharge,flows through a large carbonate rock region in South *** chemical and Sr isotopic compositions of the Xijiang waters were determined during the high-flow season in order to understand the chemical weathering processes,associated CO consumption and anthropogenic influences within the carbonate-dominated *** major ion compositions of the river waters are characterized by the dominance of Ca,Mg,HCOand are significantly rich in *** SOis mainly derived from the oxidation of sulfide minerals and acid precipitation caused by coal *** and Sr isotopic compositions of the river waters indicate that four reservoirs(carbonates,silicates, evaporites and anthropogenic inputs)contribute to the total dissolved *** chemical weathering rates of carbonates and silicates for the Xijiang basin are estimated to be approximately 78.5 and 7.45 ton km a,*** total chemical weathering rate of rocks for the Xijiang basin is approximately 86.1 ton kma or 42.mm ka which is much higher than global mean *** budgets of CO consumption by carbonate and silicate weathering are estimated to be 2.4×10 and 54.3×10 mol a,*** would appear that HSO is involved as a proton donor in weathering reactions in the Xijiang basin;calculated results show that the contribution of cations from rock weathering induced by HSO accounts for approximately 11.2..Results from this study show that the flux of CO released into the atmosphere is approximately 0.1×10 mol C km a or 0.41×10g Ca produced by HSO-induced carbonate weathering in the *** extrapolated to the entire surface area of carbonate in SW china,the flux of CO released to the atmosphere by HSO-induced carbonate weathering is about 1.41×10gCa.

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基于裂解气质联用分析的生物质逐级热解研究

燃料化学学报 2010年第2期38卷 168-173页

作者：吴选民赵增立吴文强李海滨中国科学院广州能源研究所中国科学院可再生能源与天然气水合物重点实验室广东广州510640 中国科学院研究生院北京100049

为探究生物质快速热解反应历程,利用裂解气质联用仪对生物质进行逐级热解实验,考察在不同温度区间热解液体产物组分的分布规律。实验结果表明,生物质的化学组成和热解温度区间对热解液体产物都有重要影响。桉木在2.℃~400℃热解液体产... 详细信息

为探究生物质快速热解反应历程,利用裂解气质联用仪对生物质进行逐级热解实验,考察在不同温度区间热解液体产物组分的分布规律。实验结果表明,生物质的化学组成和热解温度区间对热解液体产物都有重要影响。桉木在2.℃~400℃热解液体产物较少,主要是吡喃和芳香类化合物,其中5,6-二氢-4-羟基-吡喃-2.酮相对峰面积随温度升高而降低;在450℃~500℃热解液体产物种类和产量均较多,主要以酮类和芳香类化合物为主。玉米芯热解规律和桉木的相似,但在2.℃~350℃主要以呋喃类化合物为主,主要热解液体产物是2.3-二氢-苯并呋喃和2.甲氧基-4-乙烯基苯酚,在400℃~450℃热解液体产物以酮类化合物为主。生物质主要化学组分在不同温度区间热解得到不同液体产物,对其进行选择性热解,能够有效实现生物质资源的综合利用。

关键词：生物质逐级热解裂解气质联用

Morphological and molecular classification of Cladophora gracilis（Griffiths） Kützing（Cladophorales,Chlorophyta） in china Sea

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Morphological and molecular classification of Cladophora gra...

中国藻类学会第八次会员大会暨第十六次学术讨论会

作者： Lin-Hong Teng~(2.3),Bing-Xin Huang~1,Lan-Ping Ding~(1,2. 1 Marine Biology institute,Shantou University,Shantou 515063,china 2.institute of Oceanology,chinese academy of Sciences,Qingdao 2.6071,china 3 Graduate University of chinese academy of Sciences,beijing 100049,china

＜正＞Due to extensive morphological plasticity,the taxonomy of Cladophora species remains *** one of the widely distributed species,*** was reported to have many varieties,which make it difficult to identify the *** ...

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重镧系离子在发光材料中的应用

中国稀土学报 2002年第6期20卷 485-490页

作者：苏锵梁宏彬赫泓陶冶吕玉华中山大学光电子材料与技术国家重点实验室广东广州510275 中国科学院长春应用化学研究所稀土化学与物理重点实验室吉林长春130022 中国科学院高能物理所正负电子对撞机国家实验室北京100039

Spectroscopic properties of heavy lanthanide ions Gd 3+ , Tb 3+ , Dy 3+ , Ho 3+ , Er 3+ , Tm 3+ , Yb 3+ , Yb 2. and Lu 3+ , and the prospect for their application in luminescence materials in the near future were disc... 详细信息

关键词：重镧系离子发光材料应用光谱性质发光性能稀土离子

The Influence of Picture-word Delayed Matching Encoding on Episodic Retrieval:An Event-related Potential Study

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The Influence of Picture-word Delayed Matching Encoding on E...

2.10 IEEE 2.d Symposium on Web Society

作者： Yunhong Zhang~(13),Qi Li~2.Wanjin Tang~1,Hong Chen~3 and Chunyan Guo~3 1 china National institute of Standardization,{2.,china 2.Key Laboratory of Mental Health,institute of Psychology,chinese academy of Sciences,{2.,china Graduate School of the chinese academy of Sciences,{2.,china 3 Key Laboratory of Learning and Cognition,Capital Normal University,{2.,china.

＜正＞An event-related potential study was conducted to make clear that how picture-word delayed matching encoding affects upon episodic retrieval, and to further investigate the relationship between encoding and episodic retrieval by ERP source analysis using the LORATA method（low resolution electromagnetic tomography,via Curry V6.0）.The experiment used learning and recognition paradigm. The results showed that the identical matching encoding facilitated episodic retrieval,and there was extra activation of Lingual gyrus in the identical match old condition in ERP source analysis,whereas the categorical matching and non-match conditions showed similar *** back to the encoding processing,it was shown that in the identical match condition an early P300 component from 350 to 450ms was *** results suggest that the early P300 component evoked by the picture-word identical matching is the critical factor affecting episodic retrieval.

关键词： picture-word encoding episodic retrieval early P300 ERP

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侦察雷达效能模型研究

系统工程与电子技术 2004年第2期26卷 206-208,276页

作者：尹航李少洪李良驯北京航空航天大学电子工程系北京100083 北京信息技术研究所北京100088

在武器装备的论证工作中,对武器系统进行定量的分析和评估工作越来越重要。随着军事电子技术的发展,侦察雷达技术不断发展而且日趋复杂,对雷达的效能分析成为雷达领域的重要研究内容。在武器系统效能分析理论的基础上,分析了系统效能分... 详细信息

在武器装备的论证工作中,对武器系统进行定量的分析和评估工作越来越重要。随着军事电子技术的发展,侦察雷达技术不断发展而且日趋复杂,对雷达的效能分析成为雷达领域的重要研究内容。在武器系统效能分析理论的基础上,分析了系统效能分析的发展趋势,提出了侦察雷达的效能评估模型和实现方法,对典型的侦察雷达进行了计算评估验证,其成果可供其它武器系统进行效能评估时借鉴参考。

关键词：侦察雷达效能分析效能评估模型武器系统作战效能

QUATERNARY GROWTH FOLDS IN THE JIUXI BASIN AT THE NORTHEASTERN MARGIN OF THE QINGHAI—XIZANG PLATEAU

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地学前缘 2000年第S1期7卷 333-334页

作者： Chen Jie 1, Karl\|Heinz Wyrwoll 2. Annette George 3,Lu Yanchou 1 (1 institute of geology,{2. Seismological Bureau, P.O.Box 9803,beijing 10002.,china, E\|mail:chenjie@*** 2.Department of Geography, University of Western Australia, N

As a consequence of the collision of India with Asia, the Qilian Shan, rising 4000～5000m above the Gobi, marks the northeastern boundary of the Tibet—Qinghai Plateau. The Qilian Shan developed as a WNW—ESE fold\|and\|thrust belt with most of the movement directed towards the NEN—NE. Its foreland margin, the Jiuxi Basin, accommodates thick sequences of Late Cenozoic alluvial sediments derived from the Qilian Shan. Thin\|skinned fold\|and\|thrust deformation in the Jiuxi basin flanking the Qilian Shan, feature Mesozoic and Cenozoic sedimentary rocks that have been detached from the underlying basal decollement and folded into a series of NW—WNW trending anticlines and synclines. Towards the south deformation in the Jiuxi basin is accommodated by a west\|north\|west fold train (Qingcaowan, Laojunmiao, and Shiyougou folds) developed during the Quaternary. These form a distinct topographic feature separating the Qilian Shan from the central Jiuxi Basin. The doubly plunging Laojunmiao anticline is 10km long and 5km wide. It is asymmetric in shape, having a steep to overturned northern limb, and a backlimb dips to the south at 2.～30°. The Laojunmiao anticline is composed of two distinct stratigraphic sequences which are defined by a syntectonic unconformity.

关键词： Qilian Shan Quaternary growth fold growth strata erosion rate uplift rate

A GIS-based mapping method on distribution of critical Ecological Situation in china

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Journal of Geographical Sciences 2000年第3期10卷 72-80页

作者： YE Qing-hua, YANG Qin-ye, LIU Gao-huan (institute of Geographic Sciences and Natural Resources Research, chinese {2. of Sciences, beijing 100101, china)

Concerned with the Critical Ecological Situation in china, according to the concept of the critical Environment and Endangerment, a set of indicators of Ecological Critical Situation has been set up. And with the powe... 详细信息

关键词： Geographical Information System (GIS) Critical Ecological Situation (ES) human-environmental relationships Eco-environmental Situation

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沈阳市四种乔木树种BVOCs排放特征

生态学杂志 2009年第12期28卷 2410-2416页

作者：陈颖史奕何兴元中国科学院沈阳应用生态研究所陆地生态过程重点实验室沈阳110016 中国科学院研究生院北京100049

采用热解析与气相色谱联用技术对沈阳市4种主要乔木树种——银中杨、垂柳、榆树和皂角的BVOCs排放特征进行了观测。实验发现,不同树种排放BVOCs的组成情况明显不同,银中杨和垂柳以释放异戊二烯为主,且二者的BVOCs排放速率明显高于其他树... 详细信息

采用热解析与气相色谱联用技术对沈阳市4种主要乔木树种——银中杨、垂柳、榆树和皂角的BVOCs排放特征进行了观测。实验发现,不同树种排放BVOCs的组成情况明显不同,银中杨和垂柳以释放异戊二烯为主,且二者的BVOCs排放速率明显高于其他树种;榆树和皂角以释放柠檬烯为主。4种乔木树种BVOCs的释放具有显著的日变化和季节变化规律,各树种的BVOCs排放速率日变化曲线多表现为单峰型,排放高峰一般出现在中午或下午,且夜间几乎均不排放异戊二烯。季节变化趋势主要表现为夏季最高,春、秋季较低。

关键词：乔木树种植物源挥发性有机物(BVOCs) 排放速率沈阳市