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Analysis of the high and low temperature centers and their relation with circulations in the East China Sea

Acta Oceanologica Sinica 2009年第2期28卷 14-22页

作者： YAng Yongzeng QIAO Fangli xia Changshui GE Renfeng First Institute of Oceanography State Oceanic Administration Qingdao 266061 China Key Laboratory of Marine Science and Numerical Modeling SOA Qingdao 266061 China

Three warm currents, the Kuroshio, its shelf intrusion branch in the northeast of Taiwan and the Taiwan Warm Current （hereafter TWC）, dominate the circulation pattern in the East China Sea （hereafter ECS）. Their origination, routes and variation in winter and summer are studied. Their relationship with four major high and low temperature centers is analyzed. Differing from the previous opinion, we suggest that the four major centers are generated to a great extent by the interaction of the currents in the ECS. In summer, a cold water belt in the northeast of Taiwan is preserved from winter between the Kuroshio and the TWC. The shelf intrusion branch of the Kuroshio separates the water belt, and two low temperature centers generate in the northeast of Taiwan. In the southern ECS, the TWC transports more heat flux northward to form a warm pool. But it is separated in the lower layer by the cold water driven by the intrusion branch of the Kuroshio. So the TWC and the intrusion branch of the Kuroshio play a dominating role to generate the high temperature center. The interaction among the eastward TWC, the northward Tsushima Warm Current （hereafter TSWC） and the southward Su Bei Coastal Flow （hereafter SBCF） generates the low temperature center in the northern ECS. In winter, the strengthening of the shelf intrusion branch of the Kuroshio obscures the two low temperature centers in the northeast of Taiwan. For the weakening of the TWC, the high temperature center in the southern ECS vanishes, and the low temperature center in the northern ECS shifts to south.

关键词： East China Sea circulation Kuroshio Taiwan Warm Current temperature

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Reproductive medicine gets a new tool

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journal of Molecular Cell Biology 2011年第6期3卷 320-321页

作者： Wei-xia Ang Cheng-Xu Delon Toh Huck-Hui ng Yuin-Han Loh Epigenetics and Cell Fates Laboratory A*STAR Institute of Medical BiologySingapore 138648Singapore NUS Graduate School for Integrative Sciences and Engineering Singapore 117597Singapore Department of Biological Sciences National University of SingaporeSingapore 117543Singapore Gene Regulation Laboratory Genome Institute of SingaporeSingapore 138672Singapore Department of Biochemistry National University of SingaporeSingapore 117597Singapore School of Biological Sciences Nanyang Technological UniversitySingapore 639798Singapore

Infertility is a problem faced by millions *** a recent paper published in Cell,Hayashi et al.(2011)provided a potential solution for male infertility through the generation of functional spermatozoa that can give ris... 详细信息

关键词： infertility offspring

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Porous Organic Cage‑Based Quasi‑Solid‑State Electrolyte with Cavity‑Induced Anion‑Trapping Effect for Long‑Life Lithium Metal Batteries

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Nano-Micro Letters 2025年第2期17卷 376-386页

作者： Wei-Min Qin Zhongliang Li Wen‑xia Su jia‑Min Hu Hanqin Zou Zhixuan Wu Zhiqin Ruan Yue‑Peng Cai Kang Li Qifeng Zheng School of Chemistry South China Normal UniversityGuangzhou 510006People’s Republic of China Key Laboratory of Functional Metal‑Organic Compounds of Hunan Province College of Chemistry and Material ScienceHengyang Normal UniversityHengyang 421008People’s Republic of China Guangzhou Key Laboratory of Energy Conversion and Energy Storage Materials Guangzhou 510006People’s Republic of China

Porous organic cages(POCs)with permanent porosity and excellent host–guest property hold great potentials in regulating ion transport behavior,yet their feasibility as solid-state electrolytes has never been testified in a practical ***,we design and fabricate a quasi-solid-state electrolyte(QSSE)based on a POC to enable the stable operation of Li-metal batteries(LMBs).Benefiting from the ordered channels and cavity-induced anion-trapping effect of POC,the resulting POC-based QSSE exhibits a high Li+transference number of 0.67 and a high ionic conductivity of 1.25×10^(−4) S cm^(−1) with a low activation energy of 0.17 *** allow for homogeneous Li deposition and highly reversible Li plating/stripping for over 2000 *** a proof of concept,the LMB assembled with POC-based QSSE demonstrates extremely stable cycling performance with 85%capacity retention after 1000 ***,our work demonstrates the practical applicability of POC as SSEs for LMBs and could be extended to other energy-storage systems,such as Na and K batteries.

关键词： Porous organic cage Cavity-induced anion-trapping Quasi-solid-state electrolyte Homogeneous Li+flux Lithium metal battery

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Warm Compaction Process of P/M Steels by Orthogonal Testing Method

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journal of Wuhan University of Technology(Materials Science) 2008年第1期23卷 105-108页

作者：叶途明 YI jianhong PEng Yuandong xia Qinglin WAng Hongzhong State Key Laboratory for Powder Metallurgy Central South University Changsha 410083 China No.1 Steelmaking Plant Wuhan Iron and Steel Corporation Wuhan 430083 China

In order to achieve higher density of P/M steels using the die wall lubrication compacting method or powder lubricant in warm compaction process, the influence of different process parameters on the green density of warm compacted samples was studied. According to the orthogonal test method, the authors systematically study the influence of the different compaction pressure, condition of lubrication and compaction temperature on the green density of the sample in the warm compaction process, and put forward the optimal process parameter of warm compaction experiment. It is found that, a high compaction pressure （≥700 MPa）, die wall lubrication combined with a small amount of internal lubricants, and fitting compaction temperature by different condition of lubrication, are the optimal parameters in warm compaction process.

关键词： warm compaction orthogonal test method die wall lubrication particle rearrangement plastic deformation

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Effect of an Alien Species Spartina alterniflora Loisel on Biogeochemical Processes of Intertidal Ecosystem in the jiangsu Coastal Region,China

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Pedosphere 2008年第1期18卷 77-85页

作者： ZHOU Hong-xia LIU jin-E ZHOU jun QIN Pei Life Science School Nanjing University Nanjing 210093 （China） Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 （China）

Spartina alterniflora Loisel, a species vegetating in intertidal flats along the eastern coast of the United States, was introduced in China almost 30 years ago and has become an urgent topic due to its invasiveness in the coastal zone of China. The impacts of this alien species S. alterniflora on intertidal ecosystem processes in the jiangsu coastland were investigated by comparing the sediment nutrient availability and trace element concentration characteristics in a mud flat and those of a four-year old Spartina salt marsh that had earlier been a mudflat. At each study site, fifteen plots were sampled in different seasons to determine the sediment characteristics along the tidal flats. The results suggested that Spartina salt marsh sediments had significantly higher total N, available P, and water content, but lower pH and bulk density than mudflat sediments. Sediment salinity, water content, total N, organic C, and available P decreased along a seaward gradient in the Spartina salt marsh and increased with vegetation biomass. Furthermore, the concentrations of trace elements and some metal elements in the sediment were higher under Spartina although these increases were not significant. Also, in the Spartina marsh, some heavy metals were concentrated in the surface layer of the sediment. The Spartina salt marsh in this study was only four years old; therefore, it is suggested that further study of this allen species on a longer time frame in the jiangsu coastland should be carried out.

关键词： alien species biogeochemical processes intertidal ecosystem salt marsh Spartina alterniflora Loisel

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Bioreducible crosslinked low molecular weight branched PEI-PBLG as an efficient gene carrier

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Science China Chemistry 2010年第12期53卷 2490-2496页

作者： GUO ZhaoPei 1,TIAN HuaYu 1,xia jiaLiang 1,2,CHEN jie 1,LIN Lin 1 & CHEN XueSi 1 1 Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China 2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun China Graduate University of Chinese Academy of Sciences Beijing China

Low molecular weight polyethylenimine-poly(gamma-benzyl L-glutamate) (PEI-PBLG) was crosslinked by N,N'-cystaminebisacrylamide (CBA) to get the polymer named as CBA-PEI-PBLG (CPP).CPP not only inherits PEI-PBLG's amphiphilic advantages,but also possesses reducible *** can complex with DNA to form ***/DNA complex particles were characterized by particle size and zeta potential *** result showed that the complex particles have suitable size and surface charges for gene *** gel retardation assay also prove CBA-PEI-PBLG has proper condensing ability for *** has good reducible property,and also has good biocompatibility because of introducing PBLG *** cytotoxicity of CPP was evaluated using MTT assay,and the results showed CPP has lower cytotoxicity compared with PEI 25 *** transfection properties were characterized in different cells by using plasmid DNA as a *** showed higher transfection efficiencies and lower cytotoxicity in HeLa *** was attributed to bioreducible and biocompatibility properties of the *** results suggested that CPP is a promising low-toxic,highly effective non-viral gene carrier.

关键词： gene carrier transfection cytotoxicity crosslinked

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Co-seismic energy release and relevant region of Tohoku M9.0 earthquake

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Science China Earth Sciences 2011年第7期54卷 947-950页

作者： LU MingFu LI Li xia MengFen WAng HaiYing BAI YiLong1 State Key Laboratory of Nonlinear Mechanics (LNM) Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China Graduate University of Chinese Academy of Sciences Beijing 100049 China National Earthquake Infrastructure Service China Earthquake Administration Beijing 100036 China Department of Physics Peking University Beijing 100871 China

＂Off the Pacific coast of Tohoku Earthquake＂（M9.0, on March l lth, 2011） is the greatest one in japanese seismic record. The hypocenter is located 130 km ESE off the Pacific coast of Tohoku with the focal depth of 24 kin. The quake-triggered tsunami afterward seriously damaged the nuclear reactors and caused severe consequences to the society.

关键词：地震记录东北能量释放太平洋沿岸震源深度核反应堆海啸

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Study on Contact Fatigue Life and Failure Mechanism of Subquenched 42CrMo Steel

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材料热处理学报 2004年第5期25卷 260-262页

作者： HEBo-lin YUYing-xia SHAOEr-yu SchoolofMechanical＆ElectricalEngineering EastChinaJiaotongUniversityNanchangChina MaterialInstitute HenanUniversityofScienceandTechnologyLuoyangChina

The effect of undissolved ferrite amount in subcritically quenched 42CrMo steel on contact fatigue properties and failure mechanism were studied. The amount of undissolved ferrite in the steel were 0%,3%,10%,15% and 20% in volume fraction, respectively. The experimental results show that the existence of undissolved ferrite can increase the contact fatigue life The contact fatigue life can be prolonged with increasing the amounts of undissolved ferrite The grain size can be fined by using subcritical quenching process and the area of phase boundaries can also be greatly increased. The stress relaxation and grain refinement due to occurring of plastic deformation are main reasons for improving the fatigue life. The existence of undissolved ferrite can increase the crack initiation period. Under the experiment conditions, when the amount of undissolved ferrite is 10%, the longest contact fatigue life can be the obtained.

关键词：亚临界灭弧接触疲劳失效机理铁素体 42CrMo钢

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Spark Plasma Sintering Properties of Ultrafine Ti(C,N)-based Cermet

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journal of Wuhan University of Technology(Materials Science) 2004年第1期19卷 69-72页

作者：丰平 Huazhong University of Science and Technology

Ultrafine Ti(C,N)-based cermet was sintered by SPS from 1050℃ to 1450℃ and its sintering properties,such as porosity,mechanical properties and phase transformation,were investigated by optical microscopy (OM),scanning electron microscopy (SEM),X-ray diffraction (XRD),and differential scanning calorimeter (DSC).It is found that the spark plasma sintering properties of Ti(C,N)-based cermet differ from those of conventional vacuum *** liquid phase appearance is at least lower by 150℃ than that in vacuum *** porosity decreases sharply below 1 200℃ and reaches minimum at 1 200℃,and afterwards it almost keeps invariable and no longer *** remarkably accelerates the phase transformation of Ti(C,N)-based cermet and it has a powerful ability to remove oxides in Ti(C,N)-based *** 1 350℃,denitrification *** graphite phase formed above 1 430℃.Both the porosity and graphite are responsible for the poor TRS.

关键词： Ti(C,N)-based cermets ultrafine cermet spark plasma sintering (SPS) sinterability densification deoxidation denitrification

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Parentage determination of an isolated Yangtze finless porpoise population Neophocaena phocaenoides asiaeorientalis in the Yangtze Tian-e-Zhou Baiji National Natural Reserve based on molecular data

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Progress in Natural Science:Materials International 2005年第2期15卷 54-61页

作者： xia junhong 1,2, ZHEng jinsong 1,2, XU Limei 1,2 and WAng Ding1*(1. Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China 2. Graduate School of the Chinese Academy of Sciences, Beijing 100039, China) Inst. of Hydrobiology Chinese Acad. of Sciences Wuhan 430072 China Graduate Sch. Chinese Acad. of Sciences Beijing 100039 China

Reproductive behaviors are poorly known for the Yangtze finless porpoise Neophocaena phocaenoides asiaeorientalis. In this study, the parentage of an isolated Yangtze finless porpoise population inhabiting the Yangtze Tian-e-Zhou Baiji National Natural Reserve is determined by analysis of microsatellite loci and mitochondrial DNA (mtDNA) control region sequences, and the porpoise's reproductive behaviors are studied. Overall 4 full parentage assignments and additional 3 single parentage assignments were determined for the population of 23 individuals. The analysis shows that their estimated reproductive cycle is shorter than that reported previously and there probably exists an overlapping between gestation and lactation period. The study also shows that the female does not show fidelity to a particular male for breeding and vice versa, the oldest males did not monopolize mating and the dominance rank could not be so strict for the porpoise society. Moreover, the porpoise's mating pattern and relatedness among candidate parents are discussed here. These results provide important information for making guidelines of management and conservation for this protected population.

关键词： Yangtze finless porpoise isolated population reproductive behavior parentage

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