检索结果-南通市图书馆

Science China earth sciences 2010年第10期53卷 1445-1459页

作者： YANG WenQiang1,LIU Liang1,CAO YuTing1,WANG Chao1,2.HE ShiPing2.LI RongShe2.& ZHU {3.aoHui1 1 State Key Laboratory of Continental Dynamics,Department of Geology,Northwest University,{3.’an 710069,China 2.{3.’an institute of Geology and Mineral Resource,{3.’an 710054,China 1. State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi’an 710069 China2. Xi’an Institute of Geology and Mineral Resource Xi’an 710054 China

The CL images,LA-ICP-MS in situ trace elements analysis,and U-Pb dating for zircons indicate that the metamorphic ages of the sillimanite-garnet-biotite gneiss and the garnet-amphibole gneiss from eastern Taxkorgan of the Western Kunlun Mountains are 2.0±2.and 2.0±3.Ma respectively,and their protolith ages are younger than 2.3.2.and 480±8 Ma *** samples were collected at the same outcrops with HP mafic granulite and HP pelitic *** assemblage of the sillimanite-garnet-biotite gneiss(Grt+Sill+Per+Q) is consistent with that of HP pelitic granulite at early high amphibolite-granulite facies *** assemblage of the garnet-amphibole gneiss(Grt+Amp+Pl+Q) is consistent with retro-metamorphic assemblage of HP mafic granulite at amphibolite facies *** dating results suggest that these HP granulites underwent peak metamorphism at 2.0±2.to 2.3.2.***,the Kangxiwar tectonic zone was probably formed by subduction and collision of the Paleo-Tethys Ocean during *** ages of the two samples,together with previously published U-Pb zircon dating age,suggest that the sillimanite-garnet schist-quartzite unit is a late Paleozoic unit,not a part of the Paleoproterozoic Bulunkuole Group.

关键词： Western Kunlun Mountains LA-ICP-MS zircon dating Bulunkuole Group Indosinian Kangxiwar tectonic zone

Al-modified yolk-shell silica particle-supported NiMo catalysts for ultradeep hydrodesulfurization of dibenzothiophene and 4,6-dimethyldibenzothiophene:Efficient accessibility of active sites and suitable acidity

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 654-666页

作者： Ke Yu Wei-Min Kong Zhen Zhao Ai-Jun Duan Lian Kong xi-Long Wang State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing102249China institute of Catalysis for Energy and environment College of Chemistry and Chemical EngineeringShenyang Normal UniversityShenyang 110034LiaoningChina

Yolk-shell SiO2.particles(YP)with center-radial meso-channels were fabricated through a simple and effective ***-containing YP-supported NiMo catalysts with different Al amounts(NiMo/AYP-x,x=Si/Al molar proportion)were prepared and dibenzothiophene(DBT)and 4,6-dimethyl-dibenzothiophene(4,6-DMDBT)were employed as the probes to evaluate the hydrodesulfurization(HDS)catalytic *** as-prepared AYP-x carriers and corresponding catalysts were characterized by some advanced characterizations to obtain deeper correlations between physicochemical properties and the HDS *** average pore sizes of series AYP-x supports are above 6.0 nm,which favors the mass transfer of organic *** cavity between the yolk and the shell is beneficial for the enrichment of S-containing compounds and the accessibility between reactants and active *** embedded into the silica framework could facilitate the formation of Lewis(L)and Brønsted(B)acid sites and adjust the metal-support interaction(MSI).Among all the as-synthesized catalysts,NiMo/AYP-2. catalyst shows the highest HDS *** improved HDS activity of NiMo/AYP-2. catalyst is attributed to the perfect combination of excellent structural properties of the yolk-shell mesoporous silica,enhanced acidity,moderate MSI,and good accessibility/dispersion of active components.

关键词： Al-containing yolk-shell silica particles Accessibility Acidity Metal-support interaction Hydrodesulfurization

The new basic theory on Quaternary environmental research

在线全文

学校读者我要写书评

暂无评论

Journal of Geographical sciences 2004年第2期14卷 242-250页

作者： ZHAO Jingbo 1, 2. 3.(1. Department of Geography, Shaanxi Normal University, xi’an 710062. China 2. Center for Historical environment and Socio-Economic Development in Northwest China, Shaanxi Normal University, xi’an 710062. China 3. State Key Laboratory of Loess and Quaternary, institute of {2. environment, CAS, xi’an 710075, China) Department of Geography Shaanxi Normal University Xi’an China Center for Historical environment and Socio-Economic Development in Northwest China Shaanxi Normal University Xi’an China State Key Laboratory of Loess and Quaternary Institute of Earth Environment CAS Xi’an China

On the basis of extensive survey to the Quaternary paleosols, soils and weathering layers in the vast northern China and the Loess Plateau, we found some unusually special phenomena of chemical components such as unsuccessive illuvium, twin illuviums, unusually thick illuvium and multi-illuviums etc. According to the analysis on the content of CaCO 3.and the data of penetrating experiment, a new theory of illuvial depth or removal depth of CaCO 3.in weathering and leaching belt was constructed, which indicates that the time of CaCO 3.removing to the illuvial depth is very short, and the effect of time factor on illuvial depth can be ignored. The theory can be taken as a credible foundation for studying many geological and geographical problems in weathering and leaching belt. When the illuvial depth of CaCO 3.is bigger than the thickness of developing belt of soil or paleosol, it can be determined that the paleosol has turned into weathering crust. When the illuvial depth of CaCO 3.is bigger than the thickness of paleosol, paleosol is leaching moderately acid soil. When two, three layers or unusually thick CaCO 3.illuviums exist in the same weathering section or at the bottom of the same paleosol, there were two or more periods forming paleosol and corresponding climatic stages at that time. On the basis of the equation of relationship between mean annual rainfall (y) and illuvial depth of CaCO 3.(x) (y = 3.5.5x + 168.5) determined in the paper, mean annual precipitation during the development of paleosol can be calculated.

关键词： new illuvial theory Quaternary soils CaCO_3.remove illuvial types illuvial depth

Improvements in energy saving and thermal comfort for electric vehicles in summer through coupled electrochromic and radiative cooling smart windows

在线全文

学校读者我要写书评

暂无评论

Building Simulation 2024年第8期17卷 1231-1251页

作者： Zhoujie Duan Shuangdui Wu Hongli Sun Borong Lin Pei Ding Tao Cui Jeremy To xi Zhang College of Architectureand environment Sichuan UniversityChengdu610065China Department of Building Science Tsinghua UniversityBejing 100084China KeyLaboratoryofEco Planning&Green Building MinistryofEducationTsinghua UniversityBeijing100084China State Key Laboratory of Hydraulics and Mountain River Engineering Sichuan UniversityChengdu 610065China School of EmergencyManagement Xihua UniversityChengdu 610039China Department of PSVD Mercedes-benz Group China Ltd.Beijing 100102China

In hot climates,the large amount of cooling load in electric vehicle(EV)results in a lot of battery energy consumption,leading the decrease of driving *** the widespread application of windows in EV,the electrochromic glass(EC)shows great prospect in lowering the cooling ***,researches on the application of EC in EV lack the consideration of both passive cooling measures and passenger comfort,which limits the further application of *** this paper,we proposed an idea combining the novel techniques of both electrochromism and radiative *** fluid dynamics(CFD)is modeled to simulate the application of electrochromic and radiative cooling coupled smart windows in hot parking conditions,exploring the improvement effect of the window on the thermal environment,comfort and energy saving of the *** results indicate that,under the intense sunlight with an outdoor temperature of 3.℃,activating the air conditioning to maintain an average interior temperature of 2.℃,the coupled windows reduced the cooling capacity of the air conditioning by 762.W compared to regular windows,which can further increase the range of ***,compared to simple electrochromic fully colored glass,the integration of radiative cooling technology can lower the window surface temperature by up to 10.7℃.Moreover,compared to regular windows,the coupled windows lowered the standard effective temperature(SET*)for passengers by appro{3.mately 7℃,significantly improving *** research findings are expected to provide guidance for optimizing window design and enhancing the performance of EV.

关键词： electrochromism radiative cooling smart windowel ectric vehicle cabin thermal comfort energy saving

Progress of loess research in China

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Geographical sciences 2004年第S1期14卷 59-63页

作者： ZHAO Jingbo1,2. HUANG Chunchang1(1. Department of Geography, Shaanxi Normal University, xi'an 710062. China 2. State Key Laboratory of Loess and Quaternary, institute of earth {2., CAS, xi'an {3., China) Department of Geography Shaanxi Normal UniversityXi'an 710062China State KeyLaboratory of Loess and Quaternary Institute of Earth EnvironmentCASXi'an 710075China Department of Geography Shaanxi Normal UniversityXi'an 710062China

Progress in Chinese loess research made in recent 15 years was introduced in this paper, including mainly distribution and paleoenvironment significance of Chinese loess, new development of loess formation age, red-brown paleosol types and environmental change, loess-paleosol sequence and climate cycles, monsoon strength change during last interglacial and last glacial periods in the Loess Plateau, climate events, and source areas of loess and material.

关键词： Chinese loess paleosols loess age monsoon strength climate events material source

Monitoring and Warning of Landslides and Debris Flows Using an Optical Fiber Sensor Technology

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Mountain Science 2011年第5期8卷 728-738页

作者： PEI Huafu CUI Peng YIN Jianhua ZHU Honghu CHEN xiaoqing PEI Laizheng Department of Civil and Structural Engineering the Hong Kong Polytechnic University Hong Kong China institute of Mountain Hazards and environment CAS Chengdu 610041 China School of earth sciences and Engineering Nanjing University Nanjing 210093 China

Landslides and debris flows are typical geo-hazards which occur in hilly or mountainous regions. Debris flows may result from landslides. Geotechnical instrumentation plays an important role in monitoring and warning of landslides and resulted debris flows. Traditional technologies for monitoring landslides and debris flows have certain limitations. The new optical fiber sensors presented in this paper can overcome those limitations. This paper presents two new optical fiber sensor systems: one is the Fiber Bragg Grating (FBG)-based in-place inclinometer for monitoring landslides and the other is the FBG-based column-net system for monitoring debris flows. This paper presents the calibration results of FBG-based in-place inclinometers in laboratory. It is found that the calibration results are in good agreement with theoretical results. Both the FBG-based in-place inclinometers and the FBG-based column-net system have been installed at a site in Weijiagou valley, Beichuan County, Sichuan Province of China. Some preliminary results have been obtained and reported in the paper. The advantages of the FBG monitoring systems and their potential applications are also presented.

关键词： Landslide Debris flow Fiber Bragg Grating In-place inclinometer Column-net system

Construction and evaluation of reference standards for detection and quantification of Klebsiella pneumoniae using real-time PCR

在线全文

学校读者我要写书评

暂无评论

Journal of Pharmaceutical Analysis 2010年第3期22卷 183-187页

作者： Fei-Long Sun1,2.Min Jin3.Zhi-Gang Qiu3.Zhi-Qiang Shen3.xin-Wei Wang3.Jun-Wen Li3..School of Life Science and Technology,xi’an Jiaotong University,xi’an 710049 2.School of environmental and Chemical Engineering,xi’an Polytechnic University,xi’an 710048 3.institute of environment and Health,Tianjin 3.0050,China School of Life Science and Technology Xi'an Jiaotong University Xi'an 710049 China School of environmental and Chemical Engineering Xi'an Polytechnic University Xi'an 710048 China institute of environment and Health Tianjin 300050 China

Objective To construct reference standards for detection and quantification of Klebsiella pneumoniae(***)with SYBR Green I-based real-time PCR *** Primers were designed based on the published sequence of the phoE gene of *** standard was prepared by cell culture,PCR and T-A clone methods,and was identified by colony PCR and DNA *** The standard curve showed a very good linear negative regression between threshold cycle(Ct)and Log starting quantity of copy *** detection range was from 5.2.to 5.2.106 copies per reaction,and the detection limit was 6 copies per *** coefficients of variance(CVs)of three parallel experiments were in the range of 0.05%-0.91%.Conclusion The reference standards have high stability and *** can be used in the quantitative detection of ***.

关键词： cloning vector Klebsiella pneumoniae real-time PCR standard

Thresholds of geographic environmental elements in sediment yield of drainage basins

在线全文

学校读者我要写书评

暂无评论

Science China earth sciences 2005年第2期48卷 230-240页

作者： CHEN Hao, ZHOU Jinxing, CAI Qiangguo, LU Zhongchen & LI Zhongyan institute of Geographic sciences and Natural Resources Research, Chinese {{3. of sciences, Beijing 100101, China institute of Forestry Science, Chinese {{3. of Forestry Science, Beijing 100091, China Research Center for Eco-environment sciences, Chinese {{3. of sciences, Beijing 100085, China Computing institute of Science and Engineering, North China Electric Power University, Beijing 10{3.06, China 1. institute of Geographic sciences and Natural Resources Research Chinese Academy of Sciences 100101 Beijing China 2. institute of Forestry Science Chinese Academy of Forestry Science 100091 Beijing China 3. Research Center for Eco-environment sciences Chinese Academy of Sciences 100085 Beijing China 4. Computing institute of Science and Engineering North China Electric Power University 102206 Beijing China

Threshold of environmental elements in drainage basin sediment yield refers to, under effect of climate, underlying surface and human activity, a turning point of abrupt changes in drainage sediment yield related to environmental element characteristics. Previous studies on threshold of sediment yield of relevant drainage basins were mainly concentrated on impact of natural zones with a few researches on impact of other environmental elements. Particularly studies on compound environmental element threshold in drainage basin sediment yield remain blank today. Studies indicate that sediment yield in drainage basins is affected by compound interactions and complex actions. Based on single element analysis, the present paper gives quantitatively compound threshold of environmental elements affecting sediment yield of the drainage basin between Hekouzhen and Tongguan in the middle Yellow River by the method of multi-variant, polynomial formula regression analysis.

关键词： middle Yellow River, environmental element, sediment, sediment delivery mudule, threshold.

Primary scientific results of Chang'E-1 lunar mission

在线全文

学校读者我要写书评

暂无评论

Science China earth sciences 2010年第11期53卷 1565-1581页

作者： OUYANG ZiYuan1,2. LI ChunLai1, ZOU YongLiao1, ZHANG HongBo1, Lü Chang1, LIU JianZhong1, LIU JianJun1, ZUO Wei1, SU Yan1, WEN WeiBin1, BIAN Wei1, ZHAO BaoChang3. WANG JianYu4, YANG JianFeng3. CHANG Jin5, WANG HuanYu6, ZHANG xiaoHui7, WANG ShiJin7, WANG Min1, REN xin1, MU LingLi1, KONG DeQing1, WANG xiaoQian1, WANG Fang1, GENG Liang1, ZHANG ZhouBin1, ZHENG Lei1, ZHU xinYing1, ZHENG YongChun1, LI JunDuo1, ZOU xiaoDuan1, XU Chun1, SHI ShuoBiao1, GAO YiFei1 & GAO GuanNan1 1 National Astronomical Observatories, Chinese academy of sciences, Beijing 100012. China 2.{2. of Geochemistry, Chinese academy of sciences, Guiyang 550002. China 3.xi’an {2. of Optics and Precision Mechanics, Chinese academy of sciences, xi’an 710119, China 4 Shanghai {2. of Technical Physics, Chinese academy of sciences, Shanghai 2.0083. China 5 Purple Mountain Observatory, Chinese academy of sciences, Nanjing 2.0008, China 6 {2. of High Energy Physics, Chinese academy of sciences, Beijing 100049, China 7 Center for Space Science and Applied Research, Chinese academy of sciences, Beijing 100190, China 1. National Astronomical Observatories Chinese Academy of Sciences Beijing 100012 China2. Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China3. Xi’an Institute of Optics and Precision Mechanics Chinese Academy of Sciences Xi’an 710119 China4. Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China5. Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210008 China6. Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China7. Center for Space Science and Applied Research Chinese Academy of Sciences Beijing 100190 China

The strategic plan for the development of the unmanned Chinese Lunar Exploration Program is characterized by three distinct stages: "orbiting around", "landing on" and "returning from" the Moon. The first Chinese lunar probe, Chang'E-1, which was successfully launched on October 2.th, 2.07 at xichang Satellite Launch Center, and guided to crash on the Moon on March 1st, 2.09, at 52.3.°E, 1.50°S, in the north of Mare Fecunditatis, is the first step towards the "orbiting around" stage. The Chang'E-1 mission lasted 495 days, exceeding the expected life-span by about four months. A total of 1.3. TB raw data was received from Chang'E-1. It was then processed into 4 TB scientific data products at various levels. Many scientific results have been obtained by analyzing these data, including especially the "global lunar image from the first Chinese lunar explora- tion mission". All scientific goals of Chang'E-1 have been achieved. It provides much useful materials for further advances of lunar sciences and planetary chemistry. Meanwhile, these results will serve as a firm basis for future Chinese lunar missions.

关键词： lunar orbiter Chang’E-1 scientific data results

An early aged ophiolite in the Western Kunlun Mountain, northwestern Tibet plateau and its tectonic implications

在线全文

学校读者我要写书评

暂无评论

An early aged ophiolite in the Western Kunlun Mountain, nort...