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Effective AC Response of Nonlinear Spherical Coated Composites

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Communications in Theoretical Physics 2004年第5期41卷 771-774页

作者： CHEN Xiao-Gang WEI En-Bo SONG Jin-Bao institute of Oceanology,the chinese Academy of Sciences,{2. 2.6071,China institute of Oceanology the Chinese Academy of Sciences Qingdao 266071 China

Under alternating current electric field,effective response of granular nonlinear composites with sphericalcoated inclusions is investigated in the dilute limit by using the perturbation *** an external sinusoidalapplied field with finite frequency ω,the local fields and potentials of composites in general consist of components at allharmonics for cubic nonlinear constitutive *** derive the local potentials of spherical coated composites ***,we give the formulae of the nonlinear effective AC susceptibility at the third harmonic frequency.

关键词： nonlinear composite coated composite effective nonlinear response

Taxonomic diversity of fish assemblages in the Changjiang Estuary and its adjacent waters

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Acta Oceanologica Sinica 2010年第2期29卷 70-80页

作者： SHAN Xiujuan JIN Xianshi YUAN Wei Key Laboratory for Sustainable Utilization of Marine Fisheries Resource of Ministry of Agriculture Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Qingdao 266071 China Key Laboratory for Fishery Resources and Eco-environment of Shandong Province Yellow Sea Fisheries Research Institute Chinese Academy of Fishery Sciences Qingdao 266071 China

Taxonomic diversity of fish assemblages in the Changjiang Estuary （Yangtze River Estuary） and its adjacent waters was analyzed based on bottom trawl surveys carried out by R/V Beidou in June, August and October 2.06. Four groups of fishes were identified for each survey by the twoway indicator species analysis （TWIA）. Taxonomic distinctness, species richness and phylogenetic diversity were used to detect changes in taxonomic structure of fish assemblages. Most dominant fish species mainly belonged to Perciformes, Pleuronectiformes, Clupeiformes, Scorpaeniformes and Tetraodontiformes. Species richness in offshore waters of the survey area was higher than that in the other area. The average taxonomic distinctness value （AvTD,△^＋） of each fish assemblage was close to the average taxonomic distinctness of master list in the Changjiang Estuary （79.9）, and had a positive correlation with species richness and Shannon diversity index （H′）. A negative correlation was found between variations in taxonomic distinctness （VarTD, A^＋） and traditional diversity indices, which were caused by fish species component that led to longer average path lengths among species. Taxonomic diversity index （△） had the similar results with species richness, Ht, Simpson diversity index （D） and Pielou＇s evenness index （J′）. VarTD also kept stable, which further certificated that fish assemblages and ecological environment were in equilibrium. Taxonomic distinctness index （△^＋） was relatively stable in most of fish assemblages, and had higher values in some fish assemblages for a few absolutely dominant species. The present study showed that fish community formed new equilibrium stability in 2.06 in the Changjiang Estuary when compared with those in the corresponding months of annual survey from 1985 to 1986. And AvTD in each sampling station was lower than AvTD of master list in the Changjiang Estuary, so some ecological niches were absent in each sampling stations from taxonomic or phylogenetic r

关键词： the Changjiang Estuary fish assemblage taxonomic diversity

Establishment of trophic continuum in the food web of the Yellow Sea and East China Sea ecosystem: Insight from carbon and nitrogen stable isotopes

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Science China(Life Sciences) 2005年第6期48卷 531-539页

作者： CAI Deling1, LI Hongyan2. TANG Qisheng3.& SUN Yao3.1. Key Laboratory of Marine Sedimentology & Environment Geology, SOA, First institute of Oceanography, State Oceanic Administration, qingdao 2.6061, China 2. Ocean University of China, qingdao 2.6003. China 3. Yellow Sea Fisheries Research institute, chinese Academy of Fishery Sciences, qingdao 2.6071, China 1. Key Laboratory of Marine Sedimentology & Environment Geology SOA First Institute of Oceanography State Oceanic Administration 266061 Qingdao China 2. Ocean University of China 266003 Qingdao China 3. Yellow Sea Fisheries Research institute Chinese Academy of Fishery Sciences 266071 Qingdao China

Stable carbon and nitrogen isotope ratios (δ13. and δ15N) are used to study the trophic structure of food web in the Yellow Sea and East China Sea ecosystem. The trophic con-tinuum of pelagic food web from phytoplankton to top preyer was elementarily established, and a trophic structure diagram in the Yellow Sea and East China Sea was outlined in combination with carbon isotopic data of benthic organisms, which is basically consistent with and makes some improvements on the simplified Yellow Sea food web and the trophic structure diagram drawn based on the biomass of main resource population during 1985―1986. This result indicates that the stable isotope method is a potential useful means for further studying the complete marine food web trophic continuum from viruses to top predators and food web stability.

关键词： food web, trophic continuum, carbon isotope, nitrogen isotope, Yellow Sea, East China Sea.

Elemental and isotopic compositions of the hydrothermal sulfide on the East Pacific Rise near 13.N

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Science China Earth Sciences 2010年第2期53卷 253-266页

作者： ZENG ZhiGang1,CHEN DaiGeng1,2.YIN XueBo1,WANG XiaoYuan1,ZHANG GuoLiang1,2.& WANG XiaoMei1,2.1 Seafloor Hydrothermal Activity Laboratory of the Key Laboratory of Marine Geology and Environment,{3. of Oceanology,chinese Academy of Sciences,{2. 2.6071,China 2.Graduate School of chinese Academy of Sciences,Beijing 100049,China 1. Seafloor Hydrothermal Activity Laboratory of the Key Laboratory of Marine Geology and Environment Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China2. Graduate School of Chinese Academy of Sciences Beijing 100049 China

The mineralogical,elemental,and isotopic characteristics of a hydrothermal sulfide sample from one dredge station (12.42.3.’N,103.54.48’W,water depth 2.55 m) on the East Pacific Rise near 13.N were *** hydrothermal sulfide was composed mainly of sphalerite,chalcopyrite,and pyrite and was a Zn-rich sulfide;in layer ep-s-1,goethite formed by secondary oxidation was *** concentrations of rare elements,such as Li (0.15×10-6-0.3.×10-6),Be (0.01×10-6-0.05×10-6),Zr (73.8×10-9-13.4×10-9),Nb (8.14×10-9-64.7×10-9),Hf (2.54×10-9-2..0×10-9),and Ta (0.2.3.10-9-1.2.×10-9),were far lower in the hydrothermal sulfide than in the ocean crust,whereas the content of Au was higher and the contents of Co,Ni,Sr,Cs,Ba,Bi,and U were *** correlations between Zn and Cr,Cd and Ga,Cu and P,P and In (R2.> 0.8) were positive,whereas those between Zn and Fe,Cu,and Ba (R2.> 0.8) were distinctly *** low-temperature mineral assemblages to high-temperature mineral assemblages,the spatial distributions of dispersive and rare elements (***,Li,Cs) in the hydrothermal sulfide displayed corresponding *** variations observed in some elements (e.g.,Cd,Cs,P) are controlled by Zn,Fe,and Cu sulfides,*** weathering accounts for the enrichment of V,Mn,and rare earth elements (REE) in the henna sulfide-oxidation layer that bears the secondary oxide mineral,leading to identical REE patterns for this layer (ep-s-1) and *** weathering also distinctly affects the correlations between the element ratios of the hydrothermal *** high-temperature mineral assemblages to low-temperature mineral assemblages,Fe content and δ 3.S value of the hydrothermal sulfide increase gradually,and Zn content and lead isotopic ratios decrease gradually on the contrary,which indicate the influences of seawater on elements and the sulfur and lead isotopic compositions enhance gradually during the formation of hydrothermal sulfides.

关键词： variation element isotopic composition hydrothermal sulfide East Pacific Rise 13.N

Plastic Deformation of Nano-TiO_2.Ceramics Prepared by Different Methods

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Journal of Materials Science & Technology 1999年第1期15卷 71-74页

作者： Zuolin CUI(Research Center of Nanostructure Materials, qingdao institute of Chemical Technology, 2.6042.qingdao, China) Research Center of Nanostructure Materials Qingdao Institute of Chemical Technology 266042 Qingdao China

The comparative study of the tensile plastic deformation of nano(n)-TiO2.ceramic prepared byphysical gas condensation (P) and chemical hydrolysis precipitation (C) methods was conductedby a gas pressure forming technique at 750~800℃. The results show that n-TiO2.(P) possessesexcellent property of tensile pIastic deformation comparing with n-TiO2.C). The reason for thisis attributed to the surface cleanness and soft agglomeration of n-TiO2.(P) particfe prepared inreIatively cIean vacuum condition.

关键词： TiO Nano Plastic Deformation of Nano-TiO2.Ceramics Prepared by Different Methods

Isolation and Characterization of Photosystem Ⅱ of Porphyra yezoensis Ueda

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Acta Biochimica et Biophysica Sinica 2004年第11期36卷 780-785页

作者： Zheng-Quan GAO, Guang-Ce WANG, and Cheng-Kui TSENGKey Laboratory of Experimental Marine Biology, institute of Oceanology, the chinese Academy of Sciences, {2. 2.6071, China Graduate school, the chinese Academy of Sciences, Beijing 10003., China Key Laboratory of Experimental Marine Biology Institute of Oceanology the Chinese Academy of SciencesQingdao 266071 China Graduate school the Chinese Academy of SciencesBeijing 100039 China

The thylakoid membranes were isolated and purified from gametophyte of Porphyra yezoensis Ueda (P. yezoensis) by sucrose density gradient ultracentrifugation. After P. yezoensis gametophyte thylakoid membranes were so... 详细信息

关键词： red algae Porphyra yezoensis Ueda photosystem Ⅱ polypeptide composition extrinsic protein

Relationship Between Microbial Community and Soil Properties During Natural Succession of Abandoned Agricultural Land

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Pedosphere 2010年第3期20卷 352-360页

作者： JIA Guo-Mei ZHANG Pei-Dong WANG Gang CAO Jing HAN Jing-Cheng HUANG Ying-Ping College of Chemistry and Life Science China Three Gorges Unversity Yichang 443002 (China) Key Laboratory of Arid and Grassland Ecology School of Life Science Lanzhou University Lanzhou 730000 (China) qingdao institute of {2. and Bio{3. Technology Chinese Academy of Sciences Qingdao 266071 (China)

The changes of microbial biomass carbon (MBC) and nitrogen (MBN) and microbial community in the topsoil of the abandoned agricultural land on the semi-arid Loess Plateau in China during the natural succession were evaluated to understand the relationship between microbial community and soil properties. MBC and MBN were measured using fumigation extraction, and microbial community was analyzed by the method of fatty acid methyl ester (FAME). The contents of organic C, total N, MBC, MBN, total FAME, fungal FAME, bacterial FAME and Gram-negative bacterial FAME at the natural succession sites were higher than those of the agricultural land, but lower than those of the natural vegetation sites. The MBC, MBN and total FAME were closely correlated with organic C and total N. Furthermore, organic C and total N were found to be positively correlated with fungal FAME, bacterial FAME, fungal/bacterial and Gram-negative bacterial FAME. Natural succession would be useful for improving soil microbial properties and might be an important alternative for sustaining soil quality on the semi-arid Loess Plateau in China.

关键词： fatty acid methyl ester microbial biomass soil carbon soil nitrogen

Eigen solutions of internal waves over subcritical topography

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Acta Oceanologica Sinica 2011年第2期30卷 1-8页

作者： DAI Dejun WANG Wei ZHANG Qinghua QIAO Fangli YUAN Yeli The First institute of Oceanography State Oceanic Administration Qingdao 266061 China Key Laboratory of Marine Science and Numerical Modeling State Oceanic AdministrationQingdao 266061 China Physical Oceanography Laboratory Ocean University of China Qingdao 266003 ChinaP~eceived 13 June 2010 accepted 2.December 2.10

Diapycnal mixing plays an important role in the ocean *** waves are a kind of bridge relating the diapycnal mixing to external sources of mechanical *** in obtaining eigen solutions of internal waves over curved topography is a limitation for further theoretical study on the generation problem and scattering *** this study,a kind of transform method is put forward to derive the eigen solutions of internal waves over subcritical topography in twodimensional and linear *** transform converts the curved topography in physical space to flat bottom in transform space while the governing equation of internal waves is still hyperbolic if proper transform function is ***,one can obtain eigen solutions of internal waves in the transform *** examples of transform functions,which convert the linear slope,the convex slope,and the concave slope to flat bottom,and the corresponding eigen solutions are illustrated.A method,using a polynomial to approximate the transform function and least squares method to estimate the undetermined coefficients in the polynomial,is introduced to calculate the approximate expression of the transform function for the given subcritical topography.

关键词： internal waves transform method eigen solutions subcritical curved topography

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生物网络及其一些进展

系统仿真学报 2009年第17期21卷 5300-5305页

作者：张嗣瀛张晓青岛大学复杂性科学研究所青岛266071 东北大学信息科学与工程学院沈阳110004 乌布萨拉大学医学院

DNA双螺旋结构模型的提出,使得对生物学的认识进入到分子水平,开始了分子生物学的时代,并一直持续了半个世纪。当前,生物学的研究已进入后基因组时代,其特点是:从整体或系统的水平上去认识生物体,并诞生了系统生物学。生物系统是一种复... 详细信息

DNA双螺旋结构模型的提出,使得对生物学的认识进入到分子水平,开始了分子生物学的时代,并一直持续了半个世纪。当前,生物学的研究已进入后基因组时代,其特点是:从整体或系统的水平上去认识生物体,并诞生了系统生物学。生物系统是一种复杂系统。复杂系统的一个显著特点是多个参与者密切相互作用。复杂网络是描述复杂系统的一种有力工具,系统中的参与者可表示为网络中的点,相互作用可表示为网络中的连线。这样,复杂网络也可作为分析生物系统的一种工具,例如新陈代谢过程,参与作用的"底物"及其相互作用可用复杂网络描述。生物网络的研究已约有十年的历史,给出一简要综述,介绍它的一些进展,包括代谢网及其大尺度组织,无标度拓扑,分层等级模块结构,网络鲁棒性,自相似性及分形结构等等。

关键词：后基因组生物学系统生物学生物网络复杂网络复杂系统