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Recent advances in Ni-Al bimetallic catalysis for unreactive bond transformation

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Science China Chemistry 2018年第8期61卷 1004-1013页

作者： yin-xia Wang Mengchun Ye State Key Laboratory and Institute of Elemento-Organic Chemistry Nankai University Tianjin 300071 China Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300071 China

Ni-Al bimetallic catalysis proves to be an efficient catalytic strategy for unreactive bond transformations. Recently, chiral bifunctional ligands, especially amphoteric secondary phosphine oxide(SPO) ligand, are used for a more powerful synergistic effect in the bimetal-catalyzed reactions, providing not only milder reaction conditions and higher reactivity but also excellent reaction selectivity. Herein, we give a brief review on the development of Ni-Al bimetallic catalytic system and highlight recent advances in enantioselective Ni-Al bimetallic catalysis for unreactive bond transformation.

关键词： nickel aluminum bimetallic catalysis SPO ligand unreactive bond

Stochastic Resonance Induced by an Asymmetric Two-state Noise

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Communications in Theoretical Physics 2005年第3X期44卷 426-430页

作者： HAN yin-xia Graduate School of China Academy of Engineering Physics P.O. Box 2101 Beijing 100088 China CCAST (World Laboratory) P.O. Box 8730 Beijing 100080 China Center for Nonlinear Studies Institute of Applied Physics and Computational Mathematics P.O. Box 8009(28) Beijing 100088 China

Stochastic resonance （SR） phenomenon of the system that is subject to the asymmetric two-state noise is investigated from the broad sense. It is shown that the amplitudes of the output signal exhibit the non-monotonic dependence on the input signal frequency w, and the parameters describing the asymmetric two-state noise, such as the transition rate A, the order parameter k describing the asymmetric degree of the two-state noise, and the noise strength D.

关键词： dichotomous noise stochastic resonance the first moment

Influence of temperature on metal-organic frameworks

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Chinese Chemical Letters 2014年第6期25卷 823-828页

作者： yin-xia Sun Wei-yin Sun Coordination Chemistry Institute State Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresNanjing University School of Chemical and Biological Engineering Lanzhou Jiaotong University

Reaction temperature is one of the key parameters in the synthesis of metal-organic frameworks （MOFs）. Though there is no convergence with regard to the various experimental parameters, reaction temperature has been found to have remarkable influence on the formation and structure of MOFs, especially toward the control of topology and dimensionality of the MOF structures. Theoretically, the reaction temperature affects directly the reaction energy barrier in reaction thermodynamics and the reaction rate in the reaction kinetics. This review aims to show the influence of reaction temperature on crystal growth/assembly, structural modulation and transformation of MOFs, and to provide primary information and insights into the design and assernblv of desired MOFs.

关键词： Metal-organic frameworks (MOFs) Reaction temperature Structural transformation

Finite groups with permutable Hall subgroups

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Frontiers of Mathematics in China 2017年第5期12卷 1265-1275页

作者： xia yin Nanying YANG School of Science Jiangnan University Wuxi 214122 China

Throughout this paper, all groups are finite and G always denotes a finite group. We use π（G） to denote the set of all primes dividing ｜G｜. A subgroup A of G is said to permute with a subgroup B if AB = BA. In th... 详细信息

关键词： Finite group Hall subgroup complete Hall or-set permutablesubgroup supersoluble group

Recovery of copper from copper slag using a microbial fuel cell and characterization of its electrogenesis

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International Journal of Minerals,Metallurgy and Materials 2017年第6期24卷 621-626页

作者： Wei-ping Liu xia-fei yin School of Chemistry and Environment Engineering Jiangsu University of Technology School of Environment and Civil Engineering Jiangnan University

The microbial fuel cell, which can convert the chemical energy of organic matter into electricity via the catalytic action of microorganisms, is a novel environmentally friendly technology for wastewater treatment and energy generation. The electrical energy generated by the microbial fuel cell can be used as an alternative to a traditional external power source required to extract copper via electrolytic treatment. A dual-chamber microbial fuel cell(DMFC) for the treatment of copper slag sulfuric acid leach liquor was constructed. The electrogenesis performance of the DMFC and its ability to extract copper from the copper slag leachate were investigated. The results demonstrated that the maximum voltage was 540 mV when the DMFC achieved steady-state operation. The removal rate of copper ions was greater than 80.0%, and the maximum value was 92.1%. Moreover, X-ray diffraction and scanning electron microscopy were used to characterize the cathodal products. The results showed that the product deposited onto the cathode was copper and that its morphology was similar to that of the electrolytic copper powder. The DMFC can generate electricity and recover copper from copper slag simultaneously.

关键词： microbial fuel cells copper slag recovery copper electrogenesis

Resonant Activation Induced by Four-Value Noise

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Communications in Theoretical Physics 2008年第2期49卷 385-390页

作者： HAN yin-xia LI Jing-Hui P.O. Box 58 Faculty of Science Ningbo University Ningbo 315211 China

The phenomenon of the resonant activation （RA） of a particle over a fluctuating potential barrier with a four-value noise is investigated. It is shown that the mean first passage time （MFPT） displays six minima as the function of the transition rates γ1, γ2, γ3, γ4, γ5, and 76 of the four-value noise, respectively. In addition, the effect of other parameters of the system, such as the noise strength D of the additive Gaussian white noise and the parameter value a, b, c, and d of the four-value noise, on the RAs is also investigated.

关键词： resonant activation four-value noise mean first passage time

The Global Convergence of Self-Scaling BFGS Algorithm with Nonmonotone Line Search for Unconstrained Nonconvex Optimization Problems

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Acta Mathematica Sinica,English Series 2007年第7期23卷 1233-1240页

作者： Hong xia yin Dong Lei DU Chinese Academy of Sciences Research Center on Data Technology and Knowledge Economy Department of Mathematics Graduate University of the Chinese Academy of Sciences Faculty of Administration University of New Brunswick

The self-scaling quasi-Newton method solves an unconstrained optimization problem by scaling the Hessian approximation matrix before it is updated at each iteration to avoid the possible large eigenvalues in the Hessian approximation matrices of the objective function. It has been proved in the literature that this method has the global and superlinear convergence when the objective function is convex （or even uniformly convex）. We propose to solve unconstrained nonconvex optimization problems by a self-scaling BFGS algorithm with nonmonotone linear search. Nonmonotone line search has been recognized in numerical practices as a competitive approach for solving large-scale nonlinear problems. We consider two different nonmonotone line search forms and study the global convergence of these nonmonotone self-scale BFGS algorithms. We prove that, under some weaker condition than that in the literature, both forms of the self-scaling BFGS algorithm are globally convergent for unconstrained nonconvex optimization problems.

关键词： nonmonotone line search self-scaling BFGS method global convergence

Stochastic Resonance Induced by Dichotomous Resistor in an Electric Circuit

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Communications in Theoretical Physics 2007年第3期47卷 487-490页

作者： LI Jing-Hui HAN yin-xia Faculty of Science Ningbo University Ningbo 315211 China

Abstract An electric circuit with dichotomous resistor is investigated. It is shown that the amplitude of the average electric current washing the resistor represents the phenomenon of stochastic resonance, which is t... 详细信息

关键词： stochastic resona.nce dichotomous noise electric current

Transport of Electron Pairs in a Superconducting Junction Device： Underdamped Case

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Communications in Theoretical Physics 2006年第6期45卷 1031-1034页

作者： LI Jing-Hui HAN yin-xia Faculty of Science Ningbo University Ningbo 315211 China

Transport of electron pairs in a superconducting junction device in the underdamped case is investigated. It is shown that the capacitance of the junctions can slow the movement of the electron pairs and reduce the net voltage. It is also shown that, for the underdamped case and the overdamped case, the movement of the electron pairs in this superconducting junctions device has some similar features. By controlling the correlation between the additive and multiplicative noise, the flux can be reversed. In addition, if the additive noise strength （or the temperature T） is large enough, a reversal can also be induced.

关键词： superconducting junction electron pairs noise