检索结果-南通市图书馆

Science china Earth {1. 2004年第9期47卷 794-803页

作者： zhang yueqiao1, chen wen2. {3. yang nong1 1. institute of Geomechanics, chinese Academy of Geological sciences, Beijing 100081, china 2. institute of Geology, chinese Academy of Geological sciences, Beijing 10003., china 3. institute of Geology and Geophysics, chinese Academy of sciences, Beijing 100029, china institute of Geo{1. Chinese Academy of Geological Sciences Beijing China institute of Geology Chinese Academy of Geological Sciences Beijing China institute of Geology and Geophysics Chinese Academy of Sciences Beijing China

Based on field geological survey, structural measurements and classical Ar/Ar dating of mica, biotite and K-feldspar, we obtain cooling ages for Miocene left-lateral shear along the Xianshuihe fault zone. The results document two thermal events during the sinistral shear. The early event (1.-1. Ma) corresponds to rapid cooling of the Zheduoshan granitic massif from above 700℃ to below 3.0℃. The late event (5-3.5 Ma) corresponds to cooling of granites intruded along the eastern side of the fault zone. These dating results provide important thermochronological constraint on the timing of late Cenozoic eastward extrusion of the Chuan-Dian Block in the SE Tibetan margin.

关键词： Xianshuihe fault zone, Zheduoshan granitic massif, sinistral shear deformation, 40Ar/3.Ar dating, late Cenozoic.

Discovery of seep carbonate nodules as new evidence for gas venting on the northern continental slope of South china Sea

在线全文

学校读者我要写书评

暂无评论

chinese Science Bulletin 2006年第10期51卷 1228-1237页

作者： chen Zhong1,2,3. YAN wen1,2,3. chen Muhong1,3. WANG Shuhong1,2,3. LU Jun1,3. {3. Fan1,3. XIANG Rong1,3. XIAO Shangbin1,3. YAN Pin1,2,3.& GU Senchang1,2,3.1. South china Sea institute of Oceanology, chinese Academy of Sci-ences, Guangzhou 5103.1, china 2. Guangzhou Center for Gas Hydrate Research, chinese Academy of sciences, Guangzhou 5103.1, china 3. Key Laboratory of Marginal Sea Geology, South china Sea institute of Oceanology and Guangzhou institute of Geochemistry, chinese Academy of sciences, Guangzhou 5103.1, china South china Sea {1. of Oceanology Chinese Academy of Sciences Guangzhou China Guangzhou Center for Gas Hydrate Research Chinese Academy of Sciences Guangzhou China Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology and Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou China

Seep carbonate nodules were firstlycollected from the southwestern Dongsha area onnorthern continental slope of South china Sea forminera{1. and geochemical studies. The resultsof X-ray diffraction show that carbonate nodules arecomposed of Fe-rich domolite,siderite and a few cal-cite and aragonite, as well as a small quantity ofnon-carbonate minerals such as goethite, quartz andclay minerals. Fe-rich dolomite and siderite charac-terized by euhedral microcrystalline structure weredirectly precipitated at cold seeps. The δ 1.C valuesfor Fe-rich dolomite and siderite in the bulk nodulesvary from ?1..24‰ to ?3..07‰, and the δ 1.O valuesrange from 0.42 to 2.76‰. Their moderate depleted1.C reflects that carbon origin is possibly thermoge- netic gas or mixed gas, which is evidence of gasventings in the seafloor. Moreover, massive wormtube fossils related to cold seeps were found on thesurfaces of carbonate nodules, and the conduitsand/or channels in semi-solidified nodules whichwere not filled by carbonate or sediment were alsoobserved. A preliminary conclusion is that activemicro gas venting with a conduit/channel diameterrange from 200 μm to 600 μm possibly exists inmodern seafloor of the carbonate nodule area.

关键词：渗出碳酸盐节碳氧同位素甲烷渗漏天然气水化物

Identification of AtENT3.as the main transporter for uridine uptake in Arabidopsis roots

在线全文

学校读者我要写书评

暂无评论

Cell Research 2006年第4期16卷 377-388页

作者： Kun Ling chen~(1.2,*) Min Xin Xu~(2,3.*) Guang Yong Li~(2,3.*) Hui Liang~2 Zong Liang Xia~(2,3. Xin Liu~2 Ji Shu {1.~1.Ai Min {1.~2 Dao wen Wang~2 ~1.chool of Life sciences,Northwest Agricultural and Forestry University,yangling 71.1.0,china ~2Center for Plant Gene Research(Beijing)and the State Kev Laboratory of Plant Cell and Chromosome Engineering,institute of Genetics and Developmental Biology,{13. Academy of sciences,Datun Road,Chaovang District,Beijing 1.01.1.china ~3.raduate School of the {13. Academy of sciences,Yuquan Road,Shijingshan District,Beijing 1.003.,china School of Life sciences Northwest Agricultural and Forestry University Yangling China Center for Plant Gene Research (Beijing) and the State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental Biology Chinese Academy of Sciences Datun Road Chaoyang District Beijing China Graduate School of the chinese Academy of {1. Yuquan Road Shijingshan District Beijing China

Previous studies have shown that Arabidopsis equilibrative nucleoside transporters （AtENTs） possess transport activitieswhen produced in yeast cells and are differentially expressed in Arabidopsis ***,we report further analysis onthe nucleoside transport activities and transcriptional patterns of AtENT *** recombinant proteins of AtENTs3.6,and 7,but not those of AtENTs 1.2,4,and 8,were found to transport thymidine with high *** to previ-ous suggestion that AtENT1.may not transport uridine,this work showed that recombinant AtENT1.was a pH-dependentand high-affinity transporter of *** grown on MS plates,the AtENT3.knockout plants were more tolerant tothe cytotoxic uridine analog 5-fluorouridine than wild-type plants and the knockout plants ofAtENT 1.or ***-sistent with this observation,the AtENT3.knockout line exhibited a significantly decreased ability to take up [3.]uridinevia the roots when compared with wild-type plants and the plants with mutated AtENT 1.or *** indicates thatAtENT3.but not AtENTs 1.and 6,is the main transporter for uridine uptake in Arabidopsis *** transcription ofAtENTs 1.3.4,6,7,and 8 was regulated in a complex manner during leaf development and *** contrast,thesix AtENT members were coordinately induced during seed *** work provides new information on thetransport properties of recombinant AtENT proteins and new clues for future studies of the in vivo transport activitiesand physiological functions of the different ENT proteins in Arabidopsis plants.

关键词： Arabidopsis equilibrative nucleoside transporter expression pattern nucleoside transport functional analysis

Use-wear evidence confirms the earliest hafted chipped-stone adzes of Upper Palaeolithic in northern china

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

chinese Science Bulletin 2010年第3期55卷 268-275页

作者： zhang XiaoLing1.2,3. SHEN {1.1.2,4 GAO Xing1.2 {1. FuYou1.2 & WANG ChunXue1.2,3.1.3. of Vertebrate Paleontology and Paleoanthropology, chinese Academy of sciences, Beijing 1.0044, china 2Laboratory of Human Evolution and Archaeometry, chinese Academy of sciences, Beijing 1.0044, china 3.raduate University of chinese Academy of sciences, Beijing 1.0049, china 4The Royal Ontario Museum, Toronto M5S 2C6, Canada institute of Vertebrate Paleontology and Paleoanthropology Chinese Academy of Sciences Beijing China Laboratory of Human Evolution and Archaeometry Chinese Academy of Sciences Beijing China Graduate University of chinese Academy of {1. Beijing China The Royal Ontario Museum Toronto Canada

Chipped-stone "adze-shaped objects" (ASOs) were identified from a few Upper Palaeolithic sites in northern china. Its morpho- {1. form resembles to ground-stone type-specific adze, but the function of the ASO has never been assessed. The objective of this study is to investigate the use function of this particular tool type recovered from the Hutouliang site in the Nihewan Basin of northern china. In this study, the lithic use-wear analysis is applied to examining microscopically edge-damages and sur- face-rounding of the tools in order to assess how they were employed. The result suggests that the ASO might have been used as woodworking tools with a hafted shaft, providing evidence for the appearance of the earliest hafted chipped-stone adzes prior to 1.000 years ago in northern china. This study also demonstrates that the use-wear technique is an innovated and effective analytic appraoch to the study of stone tool functions that has been conventionally treated by typo-techno{1. analyses. Stone tool use-patterns revealed by use-wear evidence would shed new insights on prehistoric adaptive strategies of modern human in northern china.

关键词：旧石器时代晚期中国北方磨损证据石材加工工具木工工具中国网站技术分析

Quantitative prediction model for the depth limit of oil accumulation in the deep carbonate rocks:A case study of Lower Ordovician in Tazhong area of Tarim Basin

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2024年第1期21卷 115-124页

作者： wen-{1. Wang Xiong-Qi Pang Ya-Ping Wang zhang-Xin {3. Fu-Jie Jiang Ying {3. State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing100029China State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum(Beijing)Beijing102249China College of Geosciences China University of Petroleum(Beijing)Beijing102249China Research institute of Exploration and Development PetroChina Southwest Oil&Gas Field CompanyChengdu610041SichuanChina Chemical and Petroleum Engineering Schulich School of EngineeringUniversity of CalgaryCalgaryT2N 1N4Canada

With continuous hydrocarbon exploration extending to deeper basins,the deepest industrial oil accumulation was discovered below 8,200 m,revealing a new exploration ***,the extent to which oil exploration can be extended,and the prediction of the depth limit of oil accumulation(DLOA),are issues that have attracted significant attention in petroleum *** it is difficult to characterize the evolution of the physical properties of the marine carbonate reservoir with burial depth,and the deepest drilling still cannot reach the ***,the DLOA cannot be predicted by directly establishing the relationship between the ratio of drilling to the dry layer and the *** this study,by establishing the relationships between the porosity and the depth and dry layer ratio of the carbonate reservoir,the relationships between the depth and dry layer ratio were obtained *** depth corresponding to a dry layer ratio of 1.0%is the *** on this,a quantitative prediction model for the DLOA was finally *** results indicate that the porosity of the carbonate reservoir,Lower Ordovician in Tazhong area of Tarim Basin,tends to decrease with burial depth,and manifests as an overall low porosity reservoir in deep *** critical porosity of the DLOA was 1.8%,which is the critical geological condition corresponding to a 1.0%dry layer ratio encountered in the *** depth of the DLOA was 9,000 *** study provides a new method for DLOA prediction that is beneficial for a deeper understanding of oil accumulation,and is of great importance for scientific guidance on deep oil drilling.

关键词： Deep layer Tarim Basin Hydrocarbon accumulation Depth limit of oil accumulation Prediction model

The centrosymmetric to non-centrosymmetric transformation induced by alkaline-earth cations producing infrared nonlinear optical AeMn_(6)Ga_(6)S_(1.)(Ae=Ca,Sr)

在线全文

学校读者我要写书评

暂无评论

Science china Chemistry 2024年第9期67卷 2941-2948页

作者： yang-Ping {1. Shao-Min Pei wen-Fa {3. Bin-wen Liu Xiao-Ming Jiang Guo-Cong Guo State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of china Fuzhou 350108China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China

Non-centrosymmetric(NCS)structure is an indispensable prerequisite for second-order nonlinear optical(NLO)***,the mainstream approach for designing new NCS structures still relies on chemical substitution,necessitating an urgent infusion of fresh *** this work,two isomorphic sulfides AeMn_(6)Ga_(6)S_(1.)(Ae=Ca,1.Sr,2)are afforded by modifying the skeleton of centrosymmetric(CS)Mn_(2)Ga_(2)S_(5) via introducing strong electropositive alkaline-earth ***,the incorporation of Ca^(2+)/Sr^(2+)cations allows the elementary[MnGaS_(9)]_(∞)chains to reconfigure into bumpy[MnS_(6)]-[GaS_(4)]layers in a new engagement manner,thus enabling the conversion from CS to NCS *** modifications cause not only strong second-harmonic generation(SHG)responses(~1.5×benchmark AgGaS_(2)@1.700 nm),but also significantly feasible bandgaps(2.60-2.64 e V)compared to the sulfide Mn_(2)Ga_(2)S_(5)(1.3. e V),which ultimately facilitate ultrahigh laser-induced damage thresholds(4.4-6.6×AgGaS_(2)@1.064 nm for compounds 1.and 2).The present study offers an ingenious approach for the transformation of CS to NCS structure.

关键词： second-harmonic generation non-centrosymmetrical structure NLO functional motif solid-state method

Intrathecal administration of Cav3.2 and Cav3.3.antisense oligonucleotide reverses tactile allodynia and thermal hyperalgesia in rats following chronic compression of dorsal root of ganglion

在线全文

学校读者我要写书评

暂无评论

Acta Pharmacologica Sinica 2006年第12期27卷 1547-1552页

作者： Xian-jie wen~(1.2){1.-jun LI~2 Zhi-xin {3.~2 Zhi-yuan FANG~3.{3.-xiang yang~1.Heng LI~1.Yin-ming ZENG~(2,4)1.Department of Anesthesiology,the First People's Hospital of FoShan & Affiliated FoShan Hospital of Sun-Yat Sen University,Foshan 528000,china 2 Jiangsu Province institute of Anesthesiology,Xuzhou Medical College,Xuzhou 221.02,china 3.Department of Anesthesiology,the Municipal Hospital of Suzhou,Suzhou 21.002,china Department of Anesthesiology the First People's Hospital of FoShan & Affiliated FoShan Hospital of Sun-Yat Sen University Foshan China Jiangsu Province institute of Anesthesiology Xuzhou Medical College Xuzhou China Department of Anesthesiology the Municipal Hospital of Suzhou Suzhou China

Aim:The present study aimed to elucidate the role of T-subtype calcium channels（Cav3.1.Cav3.2,and Cav3.3.in the pathogenesis of neuropathic pain at spinal ***:The chronic compression of the dorsal root ganglion（CCD）rat modelwas *** antisense oligonucleotide of Cav3.1.Cav3.2,and Cav3.3.or nor-mal saline（NS）were intrathecally administered twice per day from the first day tothe fourth day after *** mechanical withdrawal threshold and pawthermal withdrawal latency were measured to evaluate the tactile allodynia andthermal hyperalgesia,***:CCD rats developed reliable tactileallodynia and thermal hyperalgesia after *** administration ofantisense oligonucleotide of Cav3.2 and Cav3.3.significantly relieved tactileallodynia and thermal hyperalgesia in CCD rats,but not ***:Cav3.2and Cav3.3.subtype calcium channels in the spinal cord may play an important rolein the pathogenesis of neuropathic pain,which may contribute to the manage-ment of the neuropathic pain.

关键词： T-type calcium channels neuropathic pain spinal cord antisense oligonucleotide

Better use of experience from other reservoirs for accurate production forecasting by learn-to-learn method

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Petroleum Science 2024年第1期21卷 716-728页

作者： Hao-chen Wang Kai {1. Nancy chen {3.-Sheng Zhou chen Liu Ji-Fu Wang Li-Ming {1. Zhi-Gang Yu Shi-Ti Cui Mei-Chun yang china University of Petroleum(East{1.) 66 Changjiang West RoadQingdao West Coast New AreaQingdao266580ShandongChina University of Calgary 2500 University Dr NWCalgaryT2N 1N4AlbertaCanada Qingdao University of Technology Qingdao266071ShandongChina State Key Laboratory of Offshore Oil Exploitation Beijing100028China CNOOC Research institute Ltd. Beijing100028China CNPC Tarim Oilfield Branch Company Korla841000XinjiangChina National Engineering Laboratory for Exploration and Development of Low-Permeability Oil and Gas Fields Xi'an710000ShaanxiChina Sinopec Matrix Co. LTDQingdao266000ShandongChina

To assess whether a development strategy will be profitable enough,production forecasting is a crucial and difficult step in the *** development history of other reservoirs in the same class tends to be studied to make predictions ***,the permeability field,well patterns,and development regime must all be similar for two reservoirs to be considered in the same *** results in very few available experiences from other reservoirs even though there is a lot of historical information on numerous reservoirs because it is difficult to find such similar *** paper proposes a learn-to-learn method,which can better utilize a vast amount of historical data from various ***,the proposed method first learns how to learn samples before directly learning rules in ***,by utilizing gradients from networks with independent parameters and copied structure in each class of reservoirs,the proposed network obtains the optimal shared initial parameters which are regarded as transferable information across different *** on that,the network is able to predict future production indices for the target reservoir by only training with very limited samples collected from reservoirs in the same *** cases further demonstrate its superiority in accuracy to other widely-used network methods.

关键词： Production forecasting Multiple patterns Few-shot learning Transfer learning

Northernmost paleo-tethyan oceanic basin in Tibet:Geo-chronological evidence from ^(40)Ar/^(3.)Ar age dating of Dur'ngoi ophiolite

在线全文

学校读者我要写书评

暂无评论

chinese Science Bulletin 2001年第14期46卷 1203-1205页

作者： chen Liang, SUN Yong, PEI Xianzhi, GAO Ming, FENG Tao, {1. Zhongqing & chen {3.1. Laboratory of Continental Dynamics, Northwest University, Xi’an 71.069, china 2. Department of Geology, Northwest University, Xi’an, 71.069, china 3. institute of Geology, chinese Academy of Geological sciences, Beijing, 1.003., china Laboratory of Continental Dynamics Northwest University Xi’an China Department of Geology Northwest University Xi’an China institute of Geology Chinese Academy of Geological Sciences Beijing China

Whole rock 40Ar/3.Ar age dating has been conducted on a basalt sample from Dur’ngoi ophiolite, Qinghai Province, which was reported to be the northernmost pa-leo-tethyan oceanic basin in Tibet. A high temperature pla-teau age (3.5.3.7.9 Ma) with an isochorn age (3.6.6±7.1.Ma) has been obtained, representing the eruption time of oceanic crust Considering related geological settings, the new age provides constraints on the northernmost pa-leo-tethyan suture zone in Tibet and the tectonic evolution of Paleo-tethys in Northeast Tibet and adjacent areas.

关键词： Dur’ngoi ophlolite 40Ar -3.Ar age Paleo-tethys.

An ionic liquid-assisted strategy for enhanced anticorrosion of low-energy PEO coatings on magnesium–lithium alloy

在线全文

学校读者我要写书评

暂无评论

Journal of Magnesium and Alloys 2024年第6期12卷 2380-2396页

作者： You zhang Chuping {1. Haoyue Tian Shuqi Wang {1. {3. Fei {1. College of New Materials and Chemical Engineering Hydrogen Energy Research CentreBeijing Institute of Petrochemical TechnologyBeijing 102617China Key Laboratory of Advanced Structure-Function Integrated Materials and Green Manufacturing Technology Harbin Institute of TechnologyHarbin 150001China Beijing Spacecrafts China Academy of Space TechnologyBeijing 100190China

A low-energy plasma electrolytic oxidation(LePEO)technique is developed to simultaneously improve energy efficiency and *** liquids(1.butyl-3.methylimidazole tetrafluoroborate(BmimBF_(4)))as sustainable corrosion inhibitors are chosen to investigate the corrosion inhibition behavior of ionic liquid(ILs)during the LePEO process for LA91.magnesium-lithium(Mg-Li)*** show that the ionic liquid BmimBF_(4)participates in the LePEO coating formation process,causing an increment in coating thickness and surface *** low conductivity of the ionic liquid is responsible for the voltage and breakdown voltage increases during the LePEO with IL process(LePEO-IL).After adding BmimBF_(4),corrosion current density decreases from 1.1.9×1.^(−4)A·cm^(−2)to 8.1.3.1.^(−6)A·cm^(−2).The impedance modulus increases to 1.048×1.^(4)Ω·cm^(−2)and neutral salt spray remains intact for 24 *** superior corrosion resistance of the LePEO coating assisted by ionic liquid could be mainly attributed to its compact and thick barrier layer and physical absorption of ionic *** ionic liquid-assisted LePEO technique provides a promising approach to reducing energy consumption and improving film performance.

关键词： Magnesium-lithium alloy Plasma electrolytic oxidation Low energy Ionic liquid Corrosion resistance