Torsions of 3-Dimensional Small Covers

In this paper,it is shown that for a 3-dimensional small cover M over a polytope P,there are only 2-torsions in H1(M;Z).Moreover,the mod 2 Betti number growth of finite covers of M is studied.     

关于亚纯函数的分解

讨论了一类亚纯函数的分解 ,推广了整函数的相关结果 .证明了有理函数与超越整函数的复合不可能为具有非常数多项式为模的拟周期函数 .     

Une application de Corps des Normes

Let k be a perfect field of characteristic p > 0, K₀ = Frac(W(k)), a uniformizer in K₀ and _n K ₀ (n N) such that ₀ = and _n+1 ^p = _n. We write K = _nN K₀ (_n), H = Gal (K₀/ K and G = Gal(K₀/ K₀). The main result of this paper is that the functor restriction of the Galois action from the category of crystalline representations of G with Hodge–Tate weights in an interval of length p - 2 to the category of p-adic representations of H is fully faithful and its essential image is stable by sub-object and quotient. The proof uses the comparison between two ways of building mod. p representations of H: one thanks to the norm field of K, the other thanks to some categories of filtered modules with divided powers previously introduced by the author.     

西部缺水地区多样化水资源开发模式探讨

最近我国政府提出了西部大开发的战略决策。发展西部地区首要任务是研究解决水资源缺乏问题。40多年来南京大学在地下水探寻和开发、水资源评价和水污染的模拟等方面取得了系统研究成果。特别是运用新构造理论和优势面理论 ,在地下水资源探寻的研究中取得显著成效 ,近几年来作者提出的缺水山区水资源多样化开发模式研究课题 ,在河北顺平严重缺水区取得初步突破。这对于解决西部的水资源匮乏问题 ,促进西部大开发会具有重要的实际意义。     

Influence of ionic liquids on the separation factor of three standard separation problems

Vapor–liquid equilibria (VLE) for the binary systems benzene–cyclohexane, 1-hexene–n-hexane and 2-propanol–water and the ternary systems with the ionic liquids 1-hexyl-3-methyl-imidazolium bis(trifluoromethylsulfonyl)imide [HMIM]⁺[BTI]⁻ and 1-butyl-1-methyl-pyrrolidinium bis(trifluoromethylsulfonyl)imide [BMPYR]⁺[BTI]⁻ as entrainers were measured, to investigate the influence of ionic liquids on the separation factors. The experimental data were compared with the predicted results using mod. UNIFAC (Do). The predicted results are in good agreement with the experimental data.     

Periodic Solutions for Nonlinear Diferential Equations

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