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Recovery of PET-quenched Fluorescent Conjugated Polymers with Aza-15-crown-5 as Pendant Groups on Interaction with Ions

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Chinese Journal of Polymer Science 2014年第3期32卷 371-376页

作者：曹靖 Jun-xiang feng 吴诗 College of Chemistry Xiangtan University School of Pharmacy Hubei University of Science and Technology

Novel conjugated polymers with aza-15-crown-5 as pendant groups, P1 were synthesized by the Sonogashira coupling reaction. The polymer P1 was found to show fluorescence en-hancement response towards Ba2＋. The gradual recovery and turning-point of emission intensity of polymers appeared in the addition of Ba2＋, which provided good evidence for the fluorescence amplification mechanism of conjugated polymers.

关键词： Conjugated polymer Fluorescence recovery,

A note about the cyclotomic polynomial Φ_(pq)(x) and some related results

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Applied Mathematics(A Journal of Chinese Universities) 2008年第2期23卷 245-250页

作者： ZHU feng-xiang QI Wen-feng Dept. of Appl. Math. Zhengzhou Inform. Eng. Univ. Zhengzhou 450002 China

. The expression of cyclotomic polynomial Фpq （x） is concerned for a long time. A simple and explicit expression of Фpq （x） in Z[x] has been showed. The form of the factors of Фpq （x） over F2 and the upper, l... 详细信息

关键词： cyclotomic polynomial Фpq(x) coefficient factor.

Efficient photoelectrochemical oxidation of rhodamine B on metal electrodes without photocatalyst or supporting electrolyte

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Frontiers of Environmental Science & Engineering 2018年第6期12卷 113-118页

作者： Xuejiao Wang xiang feng Jing Shang State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China

We designed photoelectrochemical cells to achieve efficient oxidation of rhodamine B (RhB) without the need for photocatalyst or supporting electrolyte. RhB, the metal anode/cathode, and O2 formed an energy-relay structure, enabling the efficient formation of O2– species under ultraviolet illumination. In a single-compartment cell (S cell) containing a titanium (Ti) anode, Ti cathode, and 10 mg·mL–1 RhB in water, the zero-order rate constant of the photoelectrochemical oxidation (kPEC) of RhB was 0.049 mg·L–1·min–1, while those of the photochemical and electrochemical oxidations of RhB were nearly zero. kPEC remained almost the same when 0.5 mol·L–1 Na2SO4 was included in the reactive solution, regardless of the increase in the photocurrent of the S cell. The kPEC of the illuminated anode compartment in the two-compartment cell, including a Ti anode, Ti cathode, and 10 mg·mL–1 RhB in water, was higher than that of the S cell. These results support a simple, eco-friendly, and energysaving method to realize the efficient degradation of RhB.

关键词： Energy relay structure Energy saving Photocatalyst-free and low-salinity degradation Photoelectrochemical cell

On the Convergence Rate of a Class of Proximal-Based Decomposition Methods for Monotone Variational Inequalities

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Journal of the Operations Research Society of China 2015年第3期3卷 347-362页

作者： xiang-feng Wang Shanghai Key Lab for Trustworthy Computing Software Engineering InstituteEast China Normal UniversityShanghai 200062China

A unified efficient algorithm framework of proximal-based decomposition methods has been proposed for monotone variational inequalities in 2012,while only global convergence is proved at the same *** this paper,we give a unified proof on theO(1/t)iteration complexity,together with the linear convergence rate for this kind of proximal-based decomposition *** theε-optimal iteration complexity result defined by variational inequality,the non-ergodic relative error of adjacent iteration points is also proved to decrease in the same ***,the linear convergence rate of this algorithm framework can be constructed based on some special variational inequality properties,without necessary strong monotone conditions.

关键词： Variational inequality Proximal point algorithm Iteration complexity Relative error Convergence rate Error bound

Jacobi Last Multiplier Method for Equations of Motion of Constrained Mechanical Systems

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Chinese Physics Letters 2011年第4期28卷 12-14页

作者： CHEN xiang-Wei MEI feng-xiang Department of Physics and Information Engineering Shangqiu Normal UniversityShangqiu 476000 Department of Applied Mechanics School of AerospaceBeijing Institute of TechnologyBeijing 100081

The Jacobi last multiplier method for holonomic and nonholonomic mechanical systems is studied and some examples are given to attempt applications of the method.

关键词： method nonholonomic multiplier

About the Energy of the Universe

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Chinese Physics Letters 1996年第6期13卷 409-411页

作者： feng Shi-xiang DUAN Yi-shi Institute of Nuclear Research Chinese Academy of SciencesShanghai 201800 Institute of Theoretical Physics Lanzhou UniversityLanzhou 730000

We use the general covariant conservation law of energy-momentum,which is general covariant and therefore preferable to the non-covariant conservation laws,to analyse the energy of the universe and obtained vanishing ... 详细信息

关键词： energy vanishing discussions

Complete moment convergence for ND random variables under the sub-linear expectations

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Applied Mathematics(A Journal of Chinese Universities) 2023年第3期38卷 444-457页

作者： feng feng-xiang WANG Ding-cheng WU Qun-ying College of Science Guilin University of TechnologyGuilin 541004China School of Mathematical Science University of Electronic Science and TechnologyChengdu 611731China

In this article,we establish a general result on complete moment convergence for arrays of rowwise negatively dependent(ND)random variables under the sub-linear *** applications,we can obtain a series of results on co... 详细信息

关键词： complete convergence complete moment convergence ND random variables sub-linear expectation

Invariant Hyperbolic Tori for Gevrey-smooth Hamiltonian Systems Under Rfissmann's Non-degeneracy Condition

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Acta Mathematica Sinica,English Series 2008年第10期24卷 1625-1636页

作者： Dong feng ZHANG Jun xiang XU Department of Mathematics Southeast University Nanjing 210096 P. R. China

In this paper, we prove the persistence of hyperbolic lower dimensional invariant tori for Gevrey-smooth perturbations of partially integrable Hamiltonian systems under Riissmann＇s nondegeneracy condition by an improved KAM iteration, and the persisting invariant tori are Gevrey smooth, with the same Gevrey index as the Hamiltonian.

关键词： hyperbolic invariant tori KAM iteration Gevrey-smooth non-degeneracy condition

Key nanomaterials for industrial chemical process

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Nano Research 2023年第5期16卷 6013-6014页

作者： xiang feng Han Hu De Chen State Key Laboratory of Heavy Oil Processing China University of Petroleum(East China)Qingdao 266580China Department of Chemical Engineering Norwegian University of Science and TechnologyTrondheim 7491Norway

Growing concerns about the increasing global energy consumption and CO_(2)emission have greatly accelerated the development of new nanotechnologies in industrial chemical ***,this poses huge scientific and technological challenges,and normally requires novel materials and also novel synthesis strategies for traditional *** topical collection includes some of the latest studies on nanoscience and nanotechnology in chemical processes,such as separation,energy storage,and catalytic reactions(e.g.,hydrogenation,dehydrogenation,hydrogen evolution,selective oxidation,C–C coupling,and C–O bond formation).It includes 4 topics:(i)nanoscience and nanotechnology towards industrial process;(ii)nanomaterials for novel green chemical processes;(iii)novel nanomaterials for traditional processes;and(iv)novel synthesis strategy for nanomaterials.

关键词： materials chemical process