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Advanced information feedback strategy in intelligent two-route traffic flow systems

science China(Information sciences) 2010年第11期53卷 2265-2271页

作者： DONG ChuanFei1,2. MA Xu1,3 & WANG BingHong1,4 1Department of Modern Physics and Nonlinear science Center, university of science and Technology of China (USTC), Hefei 2.002., China 2.3} of earth and Atmospheric sciences, Georgia Institute of Technology, Atlanta, GA 30332. USA 3 Department of Physics, Syracuse university, Syracuse, NY 132.4, USA 4The Research Center for Complex System science, university of Shanghai for science and Technology and Shanghai Academy of System science, Shanghai 2.0093, China 1. Department of Modern Physics and Nonlinear science Center University of Science and Technology of China (USTC) Hefei 230026 China2. School of Earth and Atmospheric Sciences Georgia Institute of Technology Atlanta GA 30332 USA3. Department of Physics Syracuse University Syracuse NY 13244 USA4. The Research Center for Complex System Science University of Shanghai for Science and Technology and Shanghai Academy of System Science Shanghai 200093 China

The optimal information feedback has a significant effect on many socioeconomic systems like stock market and traffic systems aiming to make full use of resources. In this paper, we study dynamics of traffic flow with real-time information. The influence of a feedback strategy named vehicle number feedback strategy (VNFS) is introduced, in which we only calculate the vehicle number of first 500 route sites from the entrance. Moreover, the two-route traffic system has only one entrance and one exit, which is different from those in the previous work. Our model incorporates the effects of adaptability into the cellular automaton models of traffic flow, and simulation results by adopting this optimal information feedback strategy have demonstrated higher efficiency in controlling spatial distribution of traffic patterns than the other three information feedback strategies, i.e., TTFS, MVFS and CCFS.

关键词： vehicle number feedback strategy two-route selecting traffic flow intelligent vehicle cellular automaton model

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Environmental archaeology of the Dachang region in the Daning Valley,the Three Gorges reservoir region of the Yangtze River,China

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Chinese science Bulletin 2008年第S1期53卷 140-152页

作者： ZHANG Yun 1 &ZHU Cheng 2.1 State Key Laboratory of Vegetation and Environmental Change,Institute of Botany,Chinese Academy of sciences,Beijing 100093, China 2.school of Geographic and Oceanographic sciences,Nanjing university,Nanjing 2.0093,China 1. State Key Laboratory of Vegetation and Environmental Change Institute of Botany Chinese Academy of Sciences Beijing 100093 China 2. school of Geographic and Oceanographic sciences Nanjing University Nanjing 210093 China

Environmental archaeology of archaeological sites on both sides of the Dachang section in the Daning River,the Three Gorges of the Yangtze River,shows that riverbed evolution has a great influence on the distribution of archaeological sites during the prehistorical and historical period,and it restricts human activity and the development of ancient *** investigation,dating data,paleocurrent analysis of 100 gravels on the riverbed and archaeological excavation reveal that the riverbed of the Dachang section developed in the Shuangyantang region during the early stage,after about 30 kaBP it shifted westward gradually and reached the present *** with the westward shift,the focus of ancient culture changed for several *** the Western Zhou Dynasty's period,the east riverbank of the Daning River was the main residential *** the Han Dynasty,along with the westward shift,the living space of ancient people was no longer confined to the east riverbank and the focus of culture moved *** the Zhangjiawan site became the main dwelling *** the late Han Dynasty, the villages were flooded and the ancients had to immigrate to a high *** of the Han and the Jin Dynasties outcropped on the flood plain of the east bank because their surface sediments were eroded by several flood events and the westward shift of the riverbed.

关键词： the Daning River environmental archaeology the Shuangyantang site the Zhangjiawan site tombs of the Han and the Jin Dynasties

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Study on rare earth/alkaline earth oxide-doped CeO_2.solid electrolyte

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Rare Metals 2007年第4期26卷 311-316页

作者： YAN Kai ZHEN Qiang Song Xiwen school of Materials science and Engineering Shanghai University Shanghai 200072 China Research Center of Nanoscience and Nanotechnology Shanghai Univeesity Shanghai 200444 China school of Materials science and Engineering Inner Mongolia University of Science and Technology B aotou 014010 China

Five types of rare earth/alkaline earth oxide-doped CeO2.superfine-powders were synthesized by a low-temperature combustion technique. The relevant solid electrolyte materials were also sintered by pressureless sintering at different temperatures. The results of X-ray diffraction and transmission electron microscopy showed that the grain size of the powders was approximately 2.-30 nm, and rare earth/alkaline earth oxides were completely dissolved into ceria-based solid solution with fluorite structure. The electrical conductivities of the SmzO3-CeO2.system were measured by the ac impedance technique in air at temperatures ranging from 513-900℃. The results indicated that the ionic conductivities of Srno.2.Ce0.8Ol.875 solid electrolyte increase with increasing sintering temperature, and the relationship between the conductivities and measuring temperature obeys the An＇henius equation. Then the SmzO3-CeO2.material was further doped with other rare earth/alkaline earth oxide, and the conductivities improve with the effective index.

关键词： doped ceria rare earth/alkaline earth oxide solid electrolyte conductivity effective index

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The Crustal Shortening and Reconstruction of the Main Terranes Through Mesozoic-Cenozoic in Qinghai-Tibet Plateau

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地学前缘 2009年第S1期16卷 270-271页

作者： Meifeng Shi~(1,2.,Yalin Li~2.Ke Cao~2.1.Chengdu Institute of Geology and Mineral Resources,Chengdu 610082.China. 2.school of earth {2. and Resources,China university of Geo{2.(Beijing),Beijing 100083,China

It is one of hot issues in Tibetan research that is to study the mode,process and kinetics of the crustal shortening during *** this paper, on the basis of systematic collection,analysis and research of the existing data and results from Himalayas,Lhasa and Qiangtang terranes,we conducted the balanced cross-section *** the north Qiangtang,the line-balanced cross-section

关键词： Qinghai-Tibet Plateau crustal shortening shortening value terrane

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Forecast Method of Multimode System for Debris Flow Risk Assessment in Qingping Town,Sichuan Province,China

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Journal of Mountain science 2011年第4期8卷 592-602页

作者： KONG Jiming Key Laboratory of Mountain Hazards and earth Surface Processes Chinese Academy of Sciences Institute of Mountain Hazards and Environment Chinese Academy of Sciences

The Wenchuan earthquake of May 12.2.08 triggered large numbers of *** heavy rain on 13 August 2.10 triggered debris flows with total volume of more than 6 million cubic meters and the debris flows destroyed 500 houses and infrastructure built after the Wenchuan *** study area Qingping Town was located in the northwestern part of the Sichuan Basin of China,which needs the second reconstructions and the critical evaluation of debris *** study takes basin as the study unit and defines collapse,landslide and debris flow hazard as a geo-hazard system.A multimode system composed of principal series system and secondary parallel system were established to evaluate the hazard grade of debris flow in 138 drainage basins of Qingping *** evaluation result shows that 30.43% of study basins(42.basins) and 2..58% of study area,are in extremely high or high hazard grades,and both percentage of basin quantity and percentage of area in different hazard grades decrease with the increase of hazard *** to the geo-hazard data from the interpretation of unmanned plane image with a 0.5-m resolution and field investigation after the Wenchuan earthquake and 8.13 Big Debris Flow,the ratio of landslides and collapses increased after the Wenchuan earthquake and the ratios of extremely high or high hazard grades were more than moderate or low hazard grades obviously.2. geo-hazards after8.13 Big Debris Flow in Qingping town region all occurred in basins with extremely high or high hazard grades,and 9 debris flows were in basins with extremely high hazard *** model of multimode system for critical evaluation could forecast not only the collapse and landslide but also the debris flow precisely when the basin was taken as the study unit.

关键词： Multimode System Risk assessment Debris flow Landslide Wenchuan earthquake Qingping Town

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Uncertainties in assessing the effect of climate change on agriculture using model simulation and uncertainty processing methods

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Chinese science Bulletin 2011年第8期56卷 729-737页

作者： YAO FengMei QIN PengCheng ZHANG JiaHua LIN ErDa BOKEN Vijendra College of earth science Graduate University of Chinese Academy of Sciences Beijing 100049 China Center for earth Observation and Digital earth Chinese Academy of Sciences Beijing 100094 China Chinese Academy of Meteorological sciences Beijing 100081 China school of Geoscience Yangtze University Jingzhou 434025 China Institute of Environment and Sustainable Development in Agriculture Chinese Academy of Agricultural Sciences Beijing 100081 China Department of Geography and earth science University of Nebraska at Kearney Kearney NE 68849 USA

Model simulation is an important way to study the effects of climate change on *** assessment is subject to a range of uncertainties because of either incomplete knowledge or model technical uncertainties,impeding effective decision-making to climate *** the basis of uncertainties in the impact assessment at different levels,this article systematically summarizes the sources and propagation of uncertainty in the assessment of the effect of climate change on agriculture in terms of the climate projection,the assessment process,and the crop models linking to climate ***,techniques and methods focusing on different levels and sources of uncertainty and uncertainty propagation are introduced,and shortcomings and insufficiencies in uncertainty processing are pointed ***,in terms of how to accurately assess the effect of climate change on agriculture,improvements to further decrease potential uncertainty are suggested.

关键词：不确定性模型影响评估气候变化农业影响模型模拟不确定性传播气候预测气候模型

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CHIME AGES OF CRETACEOUS GNEISSIC GRANITOIDS IN THEPINGTAN-DONGSHAN BELT,FUJIAN, CHINA

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Geotectonica et Metallogenia 1996年第Z2期20卷 127-131页

作者： Kazuhiro SUZUKI Yoshikazu HAYAMA Michiya INOMATA Genyao WU (Dept. of earth and planetary {2., school of science, nagoya university, nagoya 464-01. japan)(Tokyo university of Agriculture, Tokyo 156, japan)(Institute of Geology, Chinese Academy of S

A method of isotopic age determination. CHIME (chemical Th-U-total Pb isochron method) for dating radioactive minerals, is introduced briefly in this paper. The monazite. xenotime and zircon from the gneissic granitoids in the Pingtan-Dengshan belt, Fujian. yield CHIME ages of 92. 7 Ma. 94. 4 Ma. 107. 1 Ma and 108. 2.Ma. reconfirming the Yanshanian granitism in southeast coast area of China.

关键词： CHIME datings Yanshanian granitism coast region of Fujian

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The influence of impurity on the critical thickness of the CeO_2.buffer layer for coated conductors

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science China(Physics,Mechanics & Astronomy) 2009年第7期52卷 993-996页

作者： PAN Min1, HUANG Zheng2. MA HuanFeng2. QIANG WeiRong2. WEI LianFu1, WANG Long2.& ZHAO Yong1,3 1 Key Laboratory of Magnetic Levitation Technologies and Maglev Trains (Ministry of Education of China), Superconductivity R&D Center (SRDC), Southwest Jiaotong university, Chengdu 610031, China 2.school of Physical {2. and Technology, Southwest Jiaotong university, Chengdu 610031, China 3 Superconductivity Research Group, school of Materials {2. and Engineering, university of New South Wale, Sydney, 2.52.NSW, Australia Key Laboratory of Magnetic Levitation Technologies and Maglev Trains (Ministry of Education of China) Superconductivity R&D Center (SRDC) Southwest Jiaotong University Chengdu 610031 China school of Physical science and Technology Southwest Jiaotong University Chengdu 610031 China Superconductivity Research Group School of Materials Science and Engineering University of New South Wale Sydney 2052 NSW Australia

The lattice parameters, band structure, density of state and elastic constant of RE-doped CeO2.(RE=Sm, Gd, Dy), the buffer material for coated HTS conductors, are calculated using the plane-wave method with pseudopotentials based on the density functional theory (DFT) of first-principle. The rule and mechanism of the effect of rare earth impurity on the critical thickness of the CeO2.buffer layer are investigated. It is found that, in the range of the calculation, the changes of the lattice volume V and elastic constant E of CeO2.with the impurity are mainly determined by the increased electrons ne of the system. The relationship of the elastic constant E and increased electrons ne is established. It is indicated that the critical thickness of the CeO2.single buffer layer doped with Sm, Gd, and Dy may be enhanced by 2.%, 43% and 33%, respectively.

关键词： CeO2 first principle critical thickness elastic constants

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Influence of the impounding process of the Three Gorges Reservoir up to water level 172.5m on water eutrophication in the Xiangxi Bay

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science China(Technological sciences) 2010年第4期53卷 1114-1125页

作者： YANG ZhengJian1,LIU DeFu1,JI DaoBin1,2.& XIAO ShangBin1,3 1 College of Civil & Hydroelectric Engineering,China Three Gorges university,Yichang 443002.China 2.school of Water Resources & Hydropower Engineering,Wuhan university,Wuhan 430072.China 3 Institute of earth Environment,Chinese Academy of sciences,Xi’an 710075,China 1. College of Civil & Hydroelectric Engineering China Three Gorges University Yichang 443002 China2. School of Water Resources & Hydropower Engineering Wuhan University Wuhan 430072 China3. Institute of Earth Environment Chinese Academy of Sciences Xi’an 710075 China

The water level of the Three Gorges Reservoir(TGR) rose to 172.5 m in two stages from September to November,*** hydrodynamic parameters and water quality parameters(*** velocity,temperature,turbidity and nutrient content) had been continuously monitored to reveal the influence of the impounding process of the TGR on the water eutrophication in the Xiangxi Bay(XXB).The maximal daily rise of the water level of the TGR was about 2.38 *** water exchange between the mainstream(the Changjiang River) and the XXB of the TGR was enhanced by density current,and its main characteristics were a density-stratified flow in different *** water exchange reduced the differences of the water quality parameters(for example,temperature,turbidity,nutrient level,pH,etc.) between the mainstream and the XXB during the impounding ***,the water stability index in the mainstream remained small but it was lowered in the *** main causes included the dilution by water of lower concentration of the chlorophyll a(Chl.a) entering from the mainstream,the decline of the water stability,and the increase of suspended silt,which induced the Chl.a to decrease in the XXB during the impounding *** grade of the water eutrophication changed from middle eutrophic level to mesotrophic state in the ***,as available nutrients were imported into the XXB from the mainstream during the impounding process the risk of water eutrophication increases in the XXB in the future.

关键词： impounding density current eutrophication the Xiangxi Bay the Three Gorges Reservoir

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Chronological record of the Early Mesozoic underplating in the northern margin of North China—U-Pb chronometry of zircons in the Late Mesozoic andesite from Western Liaoning

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Progress in Natural science:Materials International 2007年第8期17卷 943-947页

作者： Shao ji'an~(1,2.*) Zhang Hongfu~2.Liu Xiaoming~3 Li Zhitong~4 (1.school of earth and Space {2.,Peking university,Beijing 100871,China 2.Institute of Geology and Geophysics and Key Laboratory of Mineral Resources,Chinese Academy of {2.,Beijing 10002.,China 3.Key Laboratory of Continental Dynamics,Northwestern university,Xi'an 710069,China 4.Institute of Geology and Mineral Resources of Shenyang,Shenyang 110032.China) [a]school of earth and Space {2. Peking University Beijing China [b]Laboratory of Mineral Resources Chinese Academy of Sciences Institute of Geology and Continental Dynamics Beijing China [c]Key Laboratory of Continental Dynamics Northwestern university Xi'an China [d]Institute of Geology and Mineral Resources of Shenyang Shenyang China

Cathodoluminescence spectroscopic analysis of zircons in the uppermost sanukites of the early Cretaceous Yixian Forma- tion in Western Liaoning reveals zoning structures of the zircons in the volcanic rocks. LA-ICP-MS chronometry shows that the central part of the zircons is remnant zircon with a U-Pb dating of 2.4 Ma,which is consistent with the age of the Early Mesozoic underplating granulites,and that the periphery is zircon crystallizing out of the host magma with a U-Pb dating of 116 Ma,which is highly consistent with the Ar-Ar dating of the host volcanic *** of the clinopyroxenes xenocrystals in the sanukites are similar to those of the clinopyroxenes in the underplating granulites,indicating that the granulites accreted to the lower crust in the Early Mesozoic have been reformed and disrupted by the upwelling diapers of the asthenosphere and taken part in formation of the sanukites in the Late Mesozoic.

关键词： northern margin of North China Mesozoic volcanic rock U-Pb chronometry of zircon underplating granulite

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