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Relationship between bioaccumulation，distribution of MET and lipid content of aquatic organisms

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Journal of Environmental Sciences 1995年第2期7卷 212-217页

作者： Liu Zhengtao Zhou Fengfan Jin Hongjun(Department of Environmental Sciences , nanjing University , nanjing 210093 , China) Dept of Envmtl Sciences Nanjing University Nanjing China China

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Ｒｅｌａｔｉｏｎｓｈｉｐｂｅｔｗｅｅｎｂｉｏａｃｃｕｍｕｌａｔｉｏｎ，ｄｉｓｔｒｉｂｕｔｉｏｎｏｆＭＥＴａｎｄｌｉｐｉｄｃｏｎｔｅｎｔｏｆａｑｕａｔｉｃｏｒｇａｎｉｓｍｓＬｉｕＺｈｅｎｇｔａｏ；ＺｈｏｕＦｅｎｇｆａｎ；ＪｉｎＨｏｎｇｊｕｎ（Ｄｅｐａｒ...

关键词： MET bioaccumulation distribution acute toxicity : lipid content.

Nature　reserve　construction　and　its　contribution　to　the　biodiversity　conservation　in　China　mainland

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Journal of Environmental Sciences 1996年第1期8卷 15-20页

作者： Jiang Mingkang Xue Dayuan(nanjing Institute of Environmental Science, National Environmental Protection Agency, nanjing 210042,China ) nanjing Inst Envmtl Sci National Envmtl Protection Agency Nanjing China China

By the end of 1993, 763 nature reserves were established in China with a total area of 66184.1 kha, occupied proximally 6. 84% of the whole country's land *** reserves concerning biodiversity conservation include ecosystem categories of forest, grassland, desert, terrestrial wetland and waters, ocean and coast and categories of wild animal and wild plant. Based on the construction of the reserves, the contributions of the reserves of various categories to the biodiversity conservation and the existed shortages for the reserve construction in China were analyzed thoroughly in this paper.

关键词： nature reserve protected area reserve construction biodiversity conservation.

Galactic kinematics and structure defined by open clusters

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Research in Astronomy and Astrophysics 2009年第12期9卷 1285-1302页

作者： Zi Zhu Department of Astronomy Nanjing University Nanjing 210093 China

On the basis of recently published astrophysical parameters of the open clusters, we have selected 301 clusters with measurements of their kinematical parameters to trace the local structure and kinematics of the Galactic disk. The present sample covers a range of over 3.0 kpc from the Sun and gives significant estimates of the disk structure and kinematical parameters of the Galaxy. We derive the disk scale height, vertical displacement of the Sun to the Galactic plane, solar motion with respect to the local standard of rest, circular speed of the Galactic rotation, Galactocentric distance from the Sun, etc. We found that the average scale height of the disk defined by the open clusters is Zh = 58 ± 4pc, with a vertical displacement of the Sun below the Galactic plane of z0 -= - 16±4 pc. Clusters with ages older than 50 Myr are less concentrated in the average plane （Zh=67 ±6pc） than the younger clusters （Zh = 51±5pc）. Using the approximation of axisymmetric circular rotation, we have derived the distance to the Galactic center from the Sun R0 = 8.03 ±0.70 kpc, which is in excellent agreement with the best estimate of the Galactocentric distance. From a kinematical analysis, we found an agedependent rotation of the Galaxy. The older clusters exhibit a lower velocity of vorticity, but have the same shear as the younger clusters. The mean rotation velocity of the Galaxy was obtained as 235 ± 10 km s-1.

关键词： Galaxy: disk -- Galaxy: kinematics and dynamics -- Galaxy: open clustersand associations: general -- Galaxy: structure

Experimental Study on Superficial Sliding of a New Type of Offshore Platform

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China Ocean Engineering 1996年第1期11卷 121-128页

作者： Wang Zhaojing Zhang Ling Senior Engineer, Geotechnical Engineering Department, nanjing Hydraulic Research Institute, nanjing 210024 Engineer, Geotechnical Engineering Department, nanjing Hydraulic Research Institute, nanjing 210024 Geotechnical Engineering Department Nanjing Hydraulic Research Institute Nanjing 210024

In order to verify the theoretical design and computation of a new type of platform, laboratory model test of the superficial sliding of the platform is carried out. Test results show that the requirement for the stability of the platform can be satisfied, and the API-82 criterion can be met. It is also suggested that, in order to enhance the stability of the platform, a buried- pad with porous holes and a long apron-board should be adopted in the design of the new type of platform.

关键词： superficial sliding model test offshore platform

On the Conditions of a Center and General Integrals of Quadratic Differential Systems

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Acta Mathematica Sinica,English Series 2001年第2期17卷 229-236页

作者： Wei Yin YE Department of Mathematics. nanjing Normal University. nanjing 210097, P. R. China Yan Qian YE Department of Mathematics. nanjing University, nanjing 210093, P. R. China Department of Mathematics Nanjing Normal University Nanjing 210097 P. R. China Department of Mathematics Nanjing University Nanjing 210093 P. R. China

We give the general integral of quadratic differential system with center in two cases under the Chinese classification.

关键词： Quadratic differential system Center General integral

The Q Values of the Galilean Satellites and their Tidal Contributions to the Deceleration of Jupiter's Rotation

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Chinese Journal of Astronomy and Astrophysics 2004年第5期4卷 499-506页

作者： HongZhang Cheng-ZhiZhang DepartmentofAstronomy NanjingUniversityNanjing210093

The relationship between the k2/Q of the Galilean satellites and the k2J/QJ of Jupiter is derived from energy and momentum considerations. Calculations suggest that the Galilean satellites can be divided into two classes according to their Q values: Io and Ganymede have values between 10 and 50, while Europa and Callisto have values ranging from 200 to 700. The tidal contributions of the Galilean satellites to Jupiter's rotation are estimated. The main deceleration of Jupiter, which is about 99.04% of the total, comes from Io.

关键词： astrometry celestial mechanics planet and satellites: individual: (Io,Europa, Ganymede, Callisto)

IBN Rings and Orderings on Grothendieck Groups

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Acta Mathematica Sinica,English Series 1994年第3期10卷 225-230页

作者： Tong Wenting Department of Mathematics nanjing University nanjing,210008 China 1. Department of Mathematics Nanjing University 210008 Nanjing China

Let R be a ring with an identity element.R∈IBN means that Rm■Rn implies m=n,R ∈IBN1 means that Rm ■Rn⊕K implies m≥n,and R ∈IBN2 means that Rm■Rm⊕K implies K=*** this paper we give some characteristic properties of IBN1 and IBN2,with orderings o the Grothendieck *** addition,we obtain the following results:（1）If R ∈IBM1 and all finitely generated projective left R-modules are stably free,then the Grothendieck group Ko（R）is a totally ordered abelian group.（2）If the pre-ordering of the Grothendieck group Ko（R）of a ring R is a partial ordering,then R ∈IBM1 or Ko（R）=0.

关键词： IBN Rings and Orderings on Grothendieck Groups Math PSF

Rank of K_2 of elliptic curves

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Science China Mathematics 2009年第10期52卷 2107-2120页

作者： JI QingZhong & QIN HouRong Department of Mathematics, nanjing University, nanjing 210093, China 1. Department of Mathematics Nanjing University Nanjing 210093 China

We prove that (i) rank(K2(E)) 1 for all elliptic curves E defined over Q with a rational torsion point of exact order N 4; (ii) rank(K2(E)) 1 for all but at most one R-isomorphism class of elliptic curves E defined ov... 详细信息

关键词： elliptic curve regulator map Né ron model

On the 3-rank of tame kernels of certain pure cubic number fields

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Science China Mathematics 2010年第9期53卷 2381-2394页

作者： LI YuanYuan & QIN HouRong Department of Mathematics,nanjing University,nanjing 210093,China 1. Department of Mathematics Nanjing University Nanjing 210093 China

In this paper,we present some explicit formulas for the 3-rank of the tame kernels of certain pure cubic number fields,and give the density results concerning the 3-rank of the tame *** examples are given in Tables 1 ... 详细信息

关键词： the 3-rank of the tame kernels pure cubic fields density