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The Australasian frog family Ceratobatrachidae in China,Myanmar and Thailand:discovery of a new Himalayan forest frog clade

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Zoological Research 2016年第1期37卷 7-14页

作者： Fang YAN Ke JIANG Kai WANG Jie-Qiong JIN Chatmongkon SUWANNAPOOM Cheng LI Jens V.VINDUM Rafe M.BROWN Jing CHE State Key Laboratory of Genetic Resources and Evolution,Kunming Institute of Zoology,Chinese academy of sciences Southeast Asia Biodiversity Research Institute,Chinese academy of sciences Sam Noble Oklahoma Museum of Natural History and department of Biology,University of Oklahoma School of Agriculture and Natural Resources,University of Phayao Imaging Biodiversity Expedition department of herpetology,california academy of sciences Biodiversity Institute and department of Ecology and Evolutionary Biology,1345 Jayhawk Blvd,University of Kansas State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Sciences Kunming Yunnan 650223 China Southeast Asia Biodiversity Research Institute Chinese Academy of Sciences Yezin Nay Pyi Taw 05282 Myanmar. State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Sciences Kunming Yunnan 650223 China Sam Noble Oklahoma Museum of Natural History and department of Biology University of Oklahoma Norman OK 73072-7029 U.S.A. State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Sciences Kunming Yunnan 650223 China. State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Sciences Kunming Yunnan 650223 China School of Agriculture and Natural Resources University of Phayao Phayao 56000 Thailand. Imaging Biodiversity Expedition Beijing 100107 China. department of herpetology California Academy of Sciences California 94118 U.S.A. Biodiversity Institute and department of Ecology and Evolutionary Biology 1345 Jayhawk Blvd University of Kansas Lawrence KS 66045 U.S.A. State Key Laboratory of Genetic Resources and Evolution Kunming Institute of Zoology Chinese Academy of Sciences Kunming Yunnan 650223 China. chej@***.

In an effort to study the systematic affinities and species- level phylogenetic relationships of the enigmatic anurans vadably assigned to the genera Ingerana or Limnonectes （family Dicroglossidae）, we collected new molecular sequence data for five species including four Himalayan taxa, Limnonectes xizangensis, Lim. medogensis, Lim. alpine, Ingerana borealis and one southeast Asian species, I. tasanae, and analyzed these together with data from previous studies involving other ostensibly related taxa. Our surprising results demonstrate unequivocally that Lim. xizangensis, Lim. medogensis and Lira. alpine form a strongly supported clade, the sister-group of the family Australasian forest frog family Ceratobatrachidae. This discovery requires an expansion of the definition of Ceratobatrachidae and represents the first record of this family in China. These three species are distinguished from the species of Ingerana and Limnonectes by the：（1） absence of interdigital webbing of the foot, （2） absence of terminal discs on fingers and toes, （3） absence of circumarginal grooves on the fingers and toes, and （4） absence of tarsal folds. Given their phylogenetic and morphological distinctiveness, we assign them to the oldest available generic name for this clade, Liurana Dubois 1987, and transfer Liurana from Dicroglossidae to the family Ceratobatrachidae. In contrast, Ingerana tasanae was found to be clustered with strong support with the recently described genus Alcalus （Ceratobatrachidae）, a small clade of otherwise Sundaic species; this constitutes a new record of the family Ceratobatrachidae for Myanmar and Thailand. Finally, Ingerana borealis clustered with the ＂true＂ Ingerana （family Dicroglossidae）, for which the type species is L tenasserimensis.

关键词： Dicroglossidae Himalaya Liurana

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Dynamic analysis and assessment for sustainable development

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Journal of Environmental sciences 2002年第1期14卷 88-94页

作者： SHI Xiao\|qing (department of Systems Ecology, Research Center for Eco\|Environmental sciences, Chinese academy of sciences, Beijing 100085, China. ) department of Systems Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

The assessment of sustainable development is crucial for constituting sustainable development strategies. Assessment methods that exist so far usually only use an indicator system for making sustainable judgement. These indicators rarely reflect dynamic characteristics. However, sustainable development is influenced by changes in the social\|economic system and in the eco\|environmental system at different times. Besides the spatial character, sustainable development has a temporal character that can not be neglected; therefore the research system should also be dynamic. This paper focuses on this dynamic trait, so that the assessment results obtained provide more information for judgements in decision\|making processes. Firstly the dynamic characteristics of sustainable development are analyzed, which point to a track of sustainable development that is an upward undulating curve. According to the dynamic character and the development rules of a social, economic and ecological system, a flexible assessment approach that is based on tendency analysis, restrictive conditions and a feedback system is then proposed for sustainable development.

关键词： sustainable development assessment dynamic analysis

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Applications of URANS on predicting unsteady turbulent separated flows

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Acta Mechanica Sinica 2009年第3期25卷 319-324页

作者： Jinglei Xu Huiyang Ma department of Physics, Graduate University of the Chinese academy of sciences, 100049 Beijing, China department of Physics Graduate University of the Chinese Academy of Sciences Beijing China

Accurate prediction of unsteady separated turbulent flows remains one of the toughest tasks and a practi cal challenge for turbulence modeling. In this paper, a 2D flow past a circular cylinder at Reynolds number 3,900 is numerically investigated by using the technique of unsteady RANS （URANS）. Some typical linear and nonlinear eddy viscosity turbulence models （LEVM and NLEVM） and a quadratic explicit algebraic stress model （EASM） are evaluated. Numerical results have shown that a high-performance cubic NLEVM, such as CLS, are superior to the others in simulating turbulent separated flows with unsteady vortex shedding.

关键词： URANS Nonlinear eddy viscosity turbulencemodel ,Separated flows Circular cylinder

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Line bundles on non-primary Hopf manifolds

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Science China Mathematics 2004年第4期47卷 538-551页

作者： LIU Weiming & ZHOU XiangyuInstitute of Mathematics, academy of Mathematics and System sciences, Chinese academy of sciences, Beijing 100080, China department of Mathematics, Zhejiang University, Hangzhou 310028, China Institute of Mathematics Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing China department of Mathematics Zhejiang University Hangzhou China

Let X be a Hopf manifolds with Abelian fundamental group, L any flat line bundle on X, we give a formula for computing explicitly the cohomology Hq(X, Ωp(L) using the method of group action and the generalized Douady... 详细信息

关键词： Hopf surface, cohomology, line bundle, sections.

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Valuations on arithmetic surfaces

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Science China Mathematics 2009年第1期52卷 66-76页

作者： XU Ning department of Mathematics, Graduate School of Chinese academy of sciences, Beijing 100049, China department of Mathematics Graduate School of Chinese Academy of Sciences Beijing China

In this paper, we give the definition of the height of a valuation and the definition of the big field ? p,G , where p is a prime and G ? ? is an additive subgroup containing 1. We conclude that ? p,G is a field and ? p,G is algebraically closed. Based on this the author obtains the complete classification of valuations on arithmetic surfaces. Furthermore, for any m ? p,G n ∈ ?, let V m,n be an ∝-vector space of dimension n - m + 1, whose coordinates are indexed from m to n. We generalize the definition of ? p,G , where p is a prime and G ? V m,n is an additive subgroup containing 1. We also conclude that ? p,G is a field if m ? 0 ? n.

关键词： valuation height rank totally ordered group big field transcendental number 14J10

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Recovery of the scale-ε2 pattern by lattice BGK model

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Communications in Nonlinear Science and Numerical Simulation 2001年第1期6卷 40-44页

作者： Guangwu YAN and Li YUAN (Institute of Computational Mathematics, academy of Mathematics and System sciences, Chinese academy of sciences, Beijing 100080, China department of mathematics, Jinn University, Chongchun 130023, China) Inst. of Computational Mathematics Acad. of Math. and System Sciences Chinese Academy of Sciences Beijing 100080 China department of Mathematics Jilin University Changchun 130023 China

A lattice BGK method for nonlinear chemical reactions is described. Since the equation does not possess the convect terms, we can easily get the equilibrium distribution functions of the lattice BGK models. Using this... 详细信息

关键词： lattice BGK method Turing pattern mosaic structure

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Relations between Lipschitz functions and convex functions

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Science China Mathematics 2005年第5期48卷 703-710页

作者： RUAN Yingbin department of Mathematics, Fujian Normal University, Fuzhou 350007, China academy of Mathematics and Systems Science, Chinese academy of sciences, Beijing 100080, China department of Mathematics Fujian Normal University Fuzhou China academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing China

We discuss the relationship between Lipschitz functions and convex functions. By these relations, we give a sufficient condition for the set of points where Lipschitz functions on a Hilbert space is Frechet differenti... 详细信息

关键词： Lipschitz functions convex functions the Frechet differentiability.

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Temperature Fluctuation Synthesis/Simultaneous Densification and Microstructure Control of Titanium Silicon Carbide (Ti_3SiC_2) Ceramics

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Journal of Materials Science & Technology 2000年第5期16卷 461-465页

作者： Zhimei SUN and Yanchun ZHOU (Ceramic and Composite department, Institute of Metal Research, Chinese academy of sciences, Shenyang 110015, China) Ceramic and Composite department Institute of Metal Research Chinese Academy of Sciences Shenyang 110015 China

A novel temperature fluctuation synthesis/simultaneous densification process was developed for the preparation of Ti3SiC2 bulk ceramics. In this process. Si is used as an in-situ liquid forming phase and it is favorable for both the solid-liquid synthesis and the densification of Ti3SiC2 rainies. The present work demonstrated that the temperature fluctuation synthesis/simultaneous densification process is one of the most effective and simple methods for the preparation of Ti3SiC2 bulk materials providing relatively low synthesis temperature. short reaction time; and simultaneous synthesis and densification. This work also showed the capability to control the microstructure, e.g., the preferred orientation, of the bulk Ti3SiC2 materials simply by applying the hot pressing pressure at different Stages of the temperature fluctuation process. And textured Ti3SiC2 bulk materials with {002} faces of laminated Ti3SiC2 grains normal to the hot pressing axis were prepared.

关键词： Ceramics Temperature Fluctuation Synthesis/Simultaneous Densification and Microstructure Control of Titanium Silicon Carbide Ti3SiC2 SiC

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Global asymptotic stability of a two species competitive system with stage structure and harvesting

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Communications in Nonlinear Science and Numerical Simulation 2001年第2期6卷 81-87页

作者： Xinyu SONG and Lansun CHEN department of Mathematics, Xinyang Teachers College, Henan 464000, China Institute of Mathematics, academy of Mathematics and System sciences, Chinese academy of sciences, Beijing 100080, China department of Mathematics Xinyang Teachers College Henan 464000 China Institute of Mathematics Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China

The dynamics of a two species competitive system, where the species one has two stages, a immature stage and a mature stage with harvesting, and the growth of the species two is of Lotka-Volterra nature, is modelled by a system of retarded functional differential equations. We obtain the conditions for global asymptotic stability of three nonnegative equilibria and the threshold of harvesting mature population. The effect of the delay on the population at equilibrium and the optimal harvesting of mature population are also considered.

关键词： optimal harvesting stage structure competitive system global asymptotic stability.

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ON THE HYPER ORDER OF SOLUTIONS OF HIGHER ORDER DIFFERENTIAL EQUATIONS

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Chinese Annals of Mathematics,Series B 2003年第4期24卷 501-508页

作者： CHEN ZONGXUAN department of Mathematics, Jiangxi Normai University, Nanchang 330027, China. Institute of Mathematics, academy of Mathematics and System sciences, Chinese academy of sciences, Beijing 100080, China. department of Mathematics Jiangxi Normal University Nanchang 330027 Institute of Mathematics Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080

The author investigates the hyper order of solutions of the higher order linear equation, andimproves the results of M. Ozawa[15], G. Gundersen[6] and J. K. Langley[12].

关键词： Differential equation Entire function Hyper order

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