检索结果-南通市图书馆

Early tectonic uplift of the northern Tibetan Plateau

Science Bulletin 2005年第15期 108-118页

作者： DAI Shuang1, FANG Xiaomin2,1, SONG Chunhui1, GAO Junping1, GAO Donglin3.& LI Jijun1 1. Key Laboratory of Western china’s Environmental Systems, Ministry of Education of china, and College of Resources and Environment, Lanzhou University, Lanzhou 73.000, china 2. {3. of Tibetan Plateau Research, chinese academy of sciences, Beijing 100085, china 3. Qinghai {3. of salt lakes, chinese academy of sciences, xining 81.008, china

The Hexi Corridor is the northmost foreland basin of the Tibetan Plateau and its formation is controlled by the northern marginal fault of Tibet, Altyn Tagh Fault （ATF）-North Qilian Shan marginal Fault （NQF）, and the southern Kuantan Shan-Longshou Shan Fault （KLF）. So its study is important to understanding the mechanism of Tibet formation and its influence on global climate change. The oldest Cenozoic sediments in the Corridor is the Huoshaogou Formation which consists of terrigenous fine conglomerate, sandstone, sandy mudstone and mudstone, depositing in al-luvial to lacustrine and fan delta sedimentary environments. Detailed paleomagnetic measurements of this sequence at Yumen clearly reveal eleven pairs of normal and reversed polarities. Fossil mammals found around the section support that most of the observed polarities can be well correlated with chrons between 13. and 18r of the standard geomag-netic polarity time scale, yielding ages of 40.2-3..3. Ma. The mean declinations of this sequence and its immediately above stratigraphy indicate an 18.3. rapid clockwise rotation of the Hexi Corridor. Since this sequence has been strongly folded and is capped by an angular unconformity, we think that the presence of the thick alluvial fan conglomeration at the bottom of the foreland basin may indicate the initial de-formation and uplift of the northern Qilian Shan. This proc-ess could occur at latest at 40.2 Ma, driven by the faults NQF and KLF that thrust onto the Hexi corridor respectively from its southern and northern margins. These faults are in an early response to the collision of India with Asia, while the unconformable termination and rotation of the Huoshaogou Formation at3..3. Ma indicate other early episode of rapid tectonic deformation and uplift of the northern Tibet.

关键词： Hexi Corridor Huoshaogou Formation Cenozoic mag-netostratigraphy Tibet uplift.

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Sensitivity of sea ice and ocean simulations to sea ice salinity in a coupled global climate model

引用

Science china Earth sciences 2010年第6期53卷 911-918页

作者： LIU JiPing State Key Laboratory of Numerical Modeling for Atmospheric sciences and Geophysical Fluid Dynamics, institute of Atmospheric Physics, chinese academy of sciences, Beijing, 100029,{3. State Key Laboratory of Numerical Modeling for Atmospheric sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing China

The impacts of the spatiotemporal variations of sea ice salinity on sea ice and ocean characteristics have not been studied in detail, as the existing climate models neglect or misrepresent this process. To address this issue, this paper formulated a parameterization with more realistic sea ice salinity budget, and examined the sensitivity of sea ice and ocean simulations to the ice salinity variations and associated salt flux into the ocean using a coupled global climate model. Results show that the inclusion of such a parameterization leads to an increase and thickening of sea ice in the Eurasian Arctic and within the ice pack in the Antarctic circumpolar region, and a weakening of the North Atlantic Deep Water and a strengthening of the Antarctic Bottom Water. The atmospheric responses associated with the ice changes were also discussed.

关键词： sea ice salinity coupled global climate model Arctic and Antarctic

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

THE HYDROCHEMICAL FEATURES OF salt lakes IN QAIDAM BASIN

引用

chinese Journal of Oceanology and Limnology 1986年第4期4卷 383-403页

作者：于升松 institute of salt lakes Academia Sinica xining

There are 3. lakes in the Qaidam Basin: 1 freshwater lake, 6 brackish-water lakes, 2 saline-water lakes and 28 {3. *** pH value of {3. lake brines is 7.014 on the average, and the average total mineralization is 3.0.75 g/1. Their water bodies belong mainly to the five-component equilibrium system, :Na, K, Mg//SO4, Cl-H2O, which can be further grouped into sodium-magnesium sulfate subtype, magnesium sulfate subtype, chloride transition subtype and chloride type water by their hydrochemical property. The {3. lake brines of the first {3. forming epoch (N2-Q3. were of the sulfate type. In the second {3. forming epoch (Q3.Q4), some of them were of the chloride *** pH value of brines decreases with the increase of total mineralization. The pH value is lower when the total mineralization is from 50-3.0 g/1 and higher when the total mineralization is from 3.0-3.5 g/l, however, when the total mineralization is higher than 3.5 g/1, the pH value decreases slowly *** total mineralization of th

关键词： CI Lake THE HYDROCHEMICAL FEATURES OF salt lakes IN QAIDAM BASIN

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Quantitative assessment of the complexity of geological structures in terms of seismic propagators

引用

Science china Earth sciences 2010年第1期53卷 54-63页

作者： FU LiYun Key Laboratory of the Earth’s Deep Interior,institute of Geology and Geophysics,chinese academy of {3.,Beijing 100029,china Key Laboratory of the Earth’s Deep Interior Institute of Geology and Geophysics Chinese Academy of Sciences Beijing China

How a wave interacts with heterogeneous media has been pursued by many *** complexity of subsurface heterogeneities is seismologically a relative concept to wavelengths of seismic waves.A growing perception is that velocity variations,propagation angles,and computational accuracies are closely related at a variety of scales.A tentative strategy to quantitatively evaluate the complexity of subsurface heterogeneous media is presented in this article to see what scales of geological heterogeneities to be captured by *** express complex subsurface structures as the slowness-and angularheterogeneity spectra to quantify velocity contrasts and dipping-angle distributions of complex geological *** the other hand,the scaling characteristics of a propagator are measured through dispersion analysis by its angular spectra plotted against refractive indexes and propagation angles,respectively.A parameter termed as imaging efficiency is introduced by associating the geological heterogeneity spectra with the propagator's angular spectra to understand the coherent interference between the medium's heterogeneity and the propagator's scaling ***,a complexity coefficient can be defined to evaluate geological complexities in terms of *** application of this strategy is demonstrated to the SEG/EAEG salt model.

关键词： geological heterogeneity spectra seismic imaging propagator’s angular spectra imaging efficiency complexity coefficient

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

On-line parallel reversed phase two-dimensional liquid chromatography for high-throughput analysis of complex proteomic samples

引用

Science china Chemistry 2006年第6期49卷 527-533页

作者： WANG Zhicong1,3. ZHANG Qinghe2, LI Tong2, ZHAO Zhongyi3.& ZHANG Weibing1 1. Dalian institute of Chemical Physics, chinese academy of sciences, Dalian 116011, china 2. Dalian Elite Analytical Instrument Co., Ltd., Dalian 116011, china 3. Faculty of Material Science and Chemical Engineering, china University of Geosciences, Wuhan 43.074, china Dalian institute of Chemical Physics Chinese Academy of Sciences Dalian China Faculty of Material Science and Chemical Engineering China University of Geosciences Wuhan China Dalian Elite Analytical Instrument Co. Ltd. Dalian China

A comprehensive two-dimensional liquid chromatographic system (2D SCX/RP) is con- structed with a 10-port-2-way valve using strong cation exchange chromatography (Hypersil SCX, 100 mm×4.6 mm I.D.) followed by reversed phase chromatography (Hypersil BDS C18, 15 mm×4.6 mm I.D.) to separate the complex peptides from globin peptic hydrolysate. After the sample was loaded on the SCX column, the phosphate buffer (pH 4.0) was used to elute the peptides. Then, elutes flowed through the interface and the peptides focused on the head of the trapping columns (Hypersil BDS C18, 15 mm×4.6 mm I.D.) but salt passed into the waste. After the valve was switched, the samples were flushed with a backward flow into the RP analytical column. The peptides on the SCX were eluted with 12 discontinuous steps linearly increasing salt concentrations. The peptides enriched on the trapping column were desalted and separated by the RP columns. The resolution and the resolved peaks of the 2D SCX/RP system were greatly increased and the total peak capacity reached as high as 2280.

关键词： two-dimensional liquid chromatography, interface, trapping column, proteomics, globin.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

COMPUTER　SIMULATION　OF　STRUCTURE　OF　MOLTEN　DyF_3.BaF_2－LiF　SYSTEM　BY　MONTE　CARLO　METHOD

引用

中国有色金属学会会刊：英文版 1996年第4期6卷 31-34页

作者： Xu Chi Su Hang Chen Nianyi(Shanghai institute of Metallurgy,chinese academy of {3.,Shanghai 200050) Shanghai institute of Metallurgy Chinese Academy of Sciences Shanghai 200050 China

ＣＯＭＰＵＴＥＲＳＩＭＵＬＡＴＩＯＮＯＦＳＴＲＵＣＴＵＲＥＯＦＭＯＬＴＥＮＤｙＦ_３－ＢａＦ_２－ＬｉＦＳＹＳＴＥＭＢＹＭＯＮＴＥＣＡＲＬＯＭＥＴＨＯＤ￥ＸｕＣｈｉ；ＳｕＨａｎｇ；ＣｈｅｎＮｉａｎｙｉ（Ｓｈａｎｇｈａｉ... 详细信息

ＣＯＭＰＵＴＥＲＳＩＭＵＬＡＴＩＯＮＯＦＳＴＲＵＣＴＵＲＥＯＦＭＯＬＴＥＮＤｙＦ_３－ＢａＦ_２－ＬｉＦＳＹＳＴＥＭＢＹＭＯＮＴＥＣＡＲＬＯＭＥＴＨＯＤ￥ＸｕＣｈｉ；ＳｕＨａｎｇ；ＣｈｅｎＮｉａｎｙｉ（ＳｈａｎｇｈａｉＩｎｓｔｉｔｕｔｅｏｆＭｅｔａｌｌ...

关键词： rare-earth fluoride molten salt computer simulation Monte Carlo method local structure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Influence of Neutral salts and pH on Exchangeable Acidity of Red Soil and Latosol Colloids

引用

Pedosphere 2002年第1期12卷 81-88页

作者： ZHOU SHIWEI, ZHANG GANGYA and ZHANG XIAONIAN institute of Soil Science, the chinese academy of sciences, Nanjing 210008 (china) institute of Soil Science the Chinese Academy of Sciences Nanjing 210008

In the present work, the exchangeable acidity of a red soilcolloid and a latosol colloid at different pH during reacting withfour neutral salts was measured. The results show that theexchangeable acidity increased with increasing amounts of the neutralsalts added, and the relation between them was almost linear. Whenthe amount of the neutral salt added was lower than a certain value,the slop of the line was high, and the slop turned low when theamount exceeded that value, so there was a turning point in eachline. The addition amounts of the neutral salts for the turningpoints were affected by the cation species of the neutral salts, butpH had less effect on them. After the turning points occurred, theexchangeable acidity of the red soil colloid still graduallyincreased with the addition amounts of the neutral salts, but that ofthe latosol colloid did not increase any more.

关键词： exchangeable acidity latosol neutral salt pH

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Impacts of human activities on water cycles in Haihe Basin

引用

Journal of Geographical sciences 1998年第3期8卷 105-109页

作者： LI Lijuan institute of Geography, chinese academy of sciences, Beijing 100101 china

This paper studies effects of human activities on water cycle in Haihe basin, focusing on the effects on the key elements of water balance and environmental issues caused by unreasonable water development and utilization. The water cycle system becomes closer than in nature with the river runoff decrease and evapotranspiration increase. River runoff reduction, groundwater over-exploitation, and water pollution have caused a series of environmental problems in the area. The main issues are river dried up, sedimentation and salt accumulation, groundwater depression, land subsidence, sea water intrusion, as well as water pollution. The author believes that the highest level of water development should below 50 percent as a whole. The best way to meet increasing water demands of human activities is to raise efficiency of water resources use. Meanwhile waste water discharge should be reduced through treatment and recycle technology.

关键词： impacts human activity water cycle Haihe basin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Selective protection of glycinebetaine on extrinsic polypeptides of PS Ⅱ particles

引用

chinese Science Bulletin 1997年第20期42卷 1744-1748页

作者： HOU Caixia, XU Chunhe, TANG Zhangcheng and SHEN YunkangShanghai institute of Plant Physiology, chinese academy of sciences, Shanghai 20003., china Shanghai institute of Plant Physiology Chinese Academy of Sciences Shanghai China

PHOTOSYSTEM Ⅱ（PS Ⅱ） particles capable of O2 evolution contain D1, D2 transmembrane pro-teins, and three extrinsic polypeptides which are exposed to the outer aqueous phase with ap-parent molecular masses of 3., 23. 18 kD. The three proteins can be partially or totally re-moved by treating the PS Ⅱ membranes with high concentrations of salt or other methods,

关键词： glycinebetaine extrinsic polypeptides trichloroacetate NaCI.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Application of Low and Ultra-Low Pressure Reverse Osmosis Membranes to Water Treatment

引用

Journal of Semiconductors 1998年第12期 66-71页

作者： Wen Ruimei (institute of Semiconductors, The chinese academy of sciences, Beijing 100083.

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｔｉｓｗｅｌｋｎｏｗｎｔｈａｔｒｅｖｅｒｓｅｏｓｍｏｓｉｓ（ＲＯ）ｉｓａｐｒｅｓｓｕｒｅ－ｄｒｉｖｅｎｐｒｏｃｅｓｓｏｆｗａｔｅｒｆｌｏｗｉｎｇａｃｒｏｓｓａｓｅｍｉｐｅｒｍｅａｂｌｅｍｅ... 详细信息

１ＩｎｔｒｏｄｕｃｔｉｏｎＩｔｉｓｗｅｌｋｎｏｗｎｔｈａｔｒｅｖｅｒｓｅｏｓｍｏｓｉｓ（ＲＯ）ｉｓａｐｒｅｓｓｕｒｅ－ｄｒｉｖｅｎｐｒｏｃｅｓｓｏｆｗａｔｅｒｆｌｏｗｉｎｇａｃｒｏｓｓａｓｅｍｉｐｅｒｍｅａｂｌｅｍｅｍｂｒａｎｅｆｒｏｍｔｈｅｓｏｌｕ...

关键词：河田川崎 Application of Low and Ultra-Low Pressure Reverse Osmosis Membranes to Water Treatment

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：