一个反应扩散方程的门槛结果

本文讨论反应扩散方程Ｃａｕｃｈｙ问题解的整体存在性，渐近性质和Ｂｌｏｗｕｐ问题．其中或者１＜ｑ＜ｐ＜＋∞，ｎ＝２．得到门槛结果．     

Weight enumerators of reducible cyclic codes and their dual codes

Let ${\mathbb{F}}_q$ be a finite field and $n$ a positive integer. In this paper, we find a new combinatorial method to determine weight enumerators of reducible cyclic codes and their dual codes of length $n$ over ${\mathbb{F}}_q$, which just generalize results of Zhu et al. (2015); especially, we also give the weight enumerator of a cyclic code, which is viewed as a partial Melas code. Furthermore, weight enumerators obtained in this paper are all in the form of power of a polynomial.     

Analysis in Theory and Applications

正Aims and Scope:Analysis in Theory and Applications(ATA)began its publication in 1984.It publishes original papers in the following fields:Approximation Theory,Dynamical Systems,Function Spaces,Fractals,Partial Differential Equations,Geometric Analysis,Harmonic Analysis,Signal Analysis,Transform Analysis,Numerical Approximation,Special Functions and Wavelets,as well as their applications.ATA is supervised by Department of Education of Jiangsu Province and sponsored by Nanjing University.     

南京下蜀土结构强度研究

利用常规三轴试验,研究了南京下蜀土结构强度及其影响因素。结果表明,下蜀土存在明显的结构性。当应变小于屈服应变时,土体的结构强度迅速的发挥;当应变大于屈服应变时,土体结构发生破坏,结构强度逐渐降低;最终当各个结构单元重新排列稳定时,土体结构完全被破坏。讨论了围压和含水量对结构强度的影响,结果表明南京下蜀土土体的结构强度和围压无关,和含水量有良好的幂函数关系。结构强度与非饱和土中吸附强度有一定的关系,可以用结构强度代替吸力,从而简化非饱和土抗剪强度公式。
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南京市区建筑场地地下水腐蚀性评价

本文介绍南京市区地下水的化学成分和建筑场地地下水腐蚀性评价以及腐蚀性原因分析。     

The Third Editorial Committee of Chinese Chemical Letters

正Editor-in-Chief Xu-Hong Qian(East China University of Science and Technology,China)Associate Editors-in-Chief Bai Yang(Jilin University,China)Huan-Fang Guo(Institute of Materia Medica.Chinese Academy of Medical Sciences,China)Jian-Gong Shi(Institute of Materia Medica,Chinese Academy of Medical Sciences,China)Ke-Min Wang(Hunan University,China)Wei-Yin Sun(Nanjing University,China)Xiao-Ming Feng(Sichuan University,China)Xin-Shan Ye(Peking University,China)Yu Liu(Nankai University,China)     

Dehydrogenative etherification homocoupling of heterocyclic N-oxides

A novel approach was developed for the dehydrogenative etherification homocoupling of heterocyclic N-oxides in the presence of silver oxide and PyBroP. Various substrates were well tolerated and the desired products were obtained in moderate to good yields. Generally, this reaction features excellent functional group compatibility, broad substrate scope and good regioselectivity.     

Catalytic asymmetric synthesis of a new class of CyPHOX ligands

Four newly designed CyPHOX ligands with chiral cyclohexane scaffold replacing the previous planar aryl group of PHOX ligands, were efficiently prepared. The synthesis features a kinetically controlled asymmetric phos-Michael reactions of trisubstituted cyclic carboxylates, which is quite simple, reliable and scalable.     

Colorimetric and ratiometric sensors derivated from natural building blocks for fluoride ion detection

Three novel colorimetric and ratiometric probes (SH-1~3) for fluoride ion detection were designed and synthesized from nature small molecules. Obvious yellow-to-orange color change of these probes in the THF was achieved only in presence of F^? among the eight anions (F^?, Cl^?, Br^?, I^?, H₂PO₄^?, HSO₄^?, CH₃COO^–, ClO₄^?), along with the emission shifting from green to orange red. These three probes are 1:1 complexed with fluoride ions, with complexation constant of around 0.1 × 10⁴ M^?1. The detection limit of probes SH-1~3 reached as low as around 1 μM. ¹H NMR titration study suggested that the fluoride ion induced deprotonation of the probe through hydrogen bonding interaction between amino group of probe and fluoride ion.     

南京地区土体热导率性质测试与分析

通过对南京地区大量粘土和粉质粘土样品热导率值的测试,分析了土体热导率与其含水量、孔隙比的相关关系。对影响土体导热值的因素作了详细分析,提出了根据土体含水量、孔隙比值计算土体热导率的经验计算公式。