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Wide-ranging Force Responsive Composites based on 1,2-Dioxetane and ZnS as Luminescent Probes in Polyurethanes

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Chinese Journal of Polymer Science 2023年第8期41卷 1162-1168,I0005页

作者： jin-Hui Zhang Shuang Liu yuan yuan Yu-Lan Chen Department of Chemistry Tianjin Key Laboratory of Molecular Optoelectronic ScienceTianjin UniversityTianjin 300354Chin State Key Laboratory of Supramolecular Structure and Materials College of ChemistryJilin UniversityChangchun 130012Chin

Combining the advantages of mechanochemiluminescence from 1,2-dioxetane and elastico-mechanoluminescence from ZnS particles,a new kind of mechanoluminescent polymer composites are *** can emit bright luminescence with two distinct colors at different strains,empowering a verstaile mechanochemical strategy for force sensing and damage detection at a wider force responsive range.

关键词： Mechanochemiluminescence 1,2-Dioxetane Elastico-mechanoluminescence ZnS Polymer composites

High-resolution Projection Dataset of Agroclimatic Indicators over Central Asia

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Advances in Atmospheric Sciences 2022年第10期39卷 1734-1745页

作者： yuan qiu jinming FENG Zhongwei YAN Jun WANG Key Laboratory of Regional Climate-Environment for Temperate East Asia(RCE-TEA) Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

To understand the potential impacts of projected climate change on the vulnerable agriculture in Central Asia(CA),six agroclimatic indicators are calculated based on the 9-km-resolution dynamical downscaled results of three different global climate models from Phase 5 of the Coupled Model Intercomparison Project(CMIP5),and their changes in the near-term future(2031-50)are assessed relative to the reference period(1986-2005).The quantile mapping(QM)method is applied to correct the model data before calculating the *** show the QM method largely reduces the biases in all the *** season length(GSL,day),summer days(SU,day),warm spell duration index(WSDI,day),and tropical nights(TR,day)are projected to significantly increase over CA,and frost days(FD,day)are projected to ***,changes in biologically effective degree days(BEDD,°C)are spatially *** high-resolution projection dataset of agroclimatic indicators over CA can serve as a scientific basis for assessing the future risks to local agriculture from climate change and will be beneficial in planning adaption and mitigation actions for food security in this region.

关键词： agroclimatic indicators Central Asia near-term future agriculture quantile mapping

Complexities of Some Problems on Multi-agent Scheduling on a Single Machine

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Journal of the Operations Research Society of China 2016年第3期4卷 379-384页

作者： jin-Jiang yuan School of Mathematics and Statistics Zhengzhou UniversityZhengzhou 450001China

We study the computational complexities of three problems on multi-agent scheduling on a single *** the three problems,the computational complexities of the first two problems were still open and the last problem was shown to be unary NP-hard in the *** show in this paper that the first two problems are unary *** also show that the unary NP-hardness proof for the last problem in the literature is invalid,and so,the exact complexity of the problem is still open.

关键词： Multi-agent scheduling Competing agents Non-disjoint agents Unary NP-hard

Microstructural characterization of Cu/Al composites and effect of cooling rate at the Cu/Al interfacial region

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International Journal of Minerals,Metallurgy and Materials 2015年第1期22卷 94-101页

作者： Yan-qiu Han Li-hua Ben jin-jin Yao Chun-jing Wu School of Materials Science and Engineering University of Science and Technology Beijing

Cu/Al composites are of vital importance in industrial applications because of their numerous advantages. The influence of bond-ing temperature and cooling rate on the microstructure and morphology of Cu/Al composites was investigated in this paper. The interfacial morphology and constituent phases at the Cu/Al interface were analyzed by optical microscopy and field-emission scanning electron mi-croscopy equipped with energy-dispersive X-ray spectroscopy. The results indicate that effective Cu-Al bonding requires a higher bonding temperature to facilitate interdiffusion between the two metals. The microstructural characteristics are associated with various bonding tem-peratures, which impact the driving force of interdiffusion. It is observed that cooling rate exerts a significant influence on the morphology and amount of the intermetallic compounds at the interfacial region. Meanwhile, microhardness measurements show that hardness varies with the bonding temperature and rate of cooling.

关键词： composite materials copper aluminum temperature cooling rate interfaces diffusion bonding

Arbitrary-Order Fractance Approximation Circuits With High Order-Stability Characteristic and Wider Approximation Frequency Bandwidth

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IEEE/CAA Journal of Automatica Sinica 2020年第5期7卷 1425-1436页

作者： qiu-Yan He Yi-Fei Pu Bo Yu Xiao yuan College of Computer Science Sichuan UniversityChengdu 610065China College of Physics and Engineering Chengdu Normal UniversityChengdu 611130China College of Electronics and Information Engineering Sichuan UniversityChengdu 610065China

This paper discusses a novel rational approximation algorithm of arbitrary-order fractances,which has high orderstability characteristic and wider approximation frequency *** fractor has been exploited extensively in various scientific *** well-known shortcoming of the existing fractance approximation circuits,such as the oscillation phenomena,is still in great need of special research *** by this need,a novel algorithm with high orderstability characteristic and wider approximation frequency bandwidth is *** order to better understand the iterating process,the approximation principle of this algorithm is investigated at ***,features of the iterating function and frequency-domain characteristics of the impedance function calculated by this algorithm are researched,***,approximation performance comparisons have been made between the corresponding circuit and other types of fractance approximation ***,a fractance approximation circuit with the impedance function of negative2/3-order is *** high order-stability characteristic and wider approximation frequency bandwidth are fundamental important advantages,which make our proposed algorithm competitive in practical applications.

关键词： Fractal fractance fractional calculus fractional-order systems

NON-TOPOLOGICAL SOLITON IN NUCLEAR MEDIUM

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Chinese Physics Letters 1990年第8期7卷 341-344页

作者： ZHANG Jianwei jin Hongli qiu Xijun Institute of Nuclear Research Academia SinicaShanghai 201849 On leave from Inner-Mongonia Teachers College for the Nationalities

The bag constant and the size increment of a nucleon(soliton)embedded in nuclear medium,are calculated in a non-topological soliton *** results may be understood as arising from the change of the vacuum properties in ... 详细信息

关键词： model. soliton increment

Influence of Noises on Remote State Preparation Using GHZ State

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Communications in Theoretical Physics 2008年第9期50卷 643-647页

作者： LIANG Hua-qiu LIU jin-Ming State Key Laboratory of Precision Spectroscopy Department of Physics East China Normal University Shanghai 200062 China Department of Physics Taizhou University Linhai 317000 China

Using a quantum channel consisting of a GHZ state exposed to noisy environment,we investigate how toremotely prepare an entangled state and a qubit state,*** solving the master equation in the Lindbladform,the influence of the various types of noises on the GHZ state is first *** we use the fidelity to describehow close the remotely prepared state and the initial state *** results show that the fidelity is a function of thedecoherence rates and the angles of the initial *** is found that for each of the two RSP schemes,the influence ofthe noise acting simultaneously in x,y,and z directions on the average fidelity is the strongest while the influence of thenoise acting in x or z direction on the average fidelity is relatively weaker.

关键词： remote state preparation fidelity GHZ state noisy environment

Laser-Assisted Elastic Electron Scattering from Argon

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Communications in Theoretical Physics 2009年第1期51卷 131-134页

作者： HU qiu-Bo SUN jin-Feng Department of Mathematics and Physics Luoyang Institute of Science and Technology Luoyang 471003 China College of Physics and Information Engineering Henan Normal University Xinxiang 453007 China Department of Physics Luoyang Normal College Luoyang 471022 China

The second Born approximation （SBA） theory is applied to the study of electron-atom scattering in the presence of a CO2 laser *** absolute differential crass sections of e-Ar scattering are calculated with multiphoton exchange in two special scattering geometries G1 （for small-angle scattering） and G2. For geometry G1, compared with the results of two different model potentials for electron elastic scattering by atoms, it is found that electronatom polarization potential plays an important role in laser-assisted electron-atom scattering. Some calculational results in geometries G2 are given. Our results are found to be better than other theoretical results as compared with the experimental data in geometries G1 and G2.

关键词： atom electron the second Born approximation laser field

Preparation and chromatographic characteristics of a novel 2,6-dimethyl-β-CD bonded HPLC chiral stationary phase

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Chinese Chemical Letters 2014年第11期25卷 1416-1418页

作者： qiu-jin Peng Jun-Jiao Yang Beijing Key Laboratory of Environmentally Harmful Chemical Analysis Beijing University of Chemical Technology

A novel 2,6-dimethyl-b-CD bonded and silica based HPLC chiral stationary phase（CSP） was *** diphenylmethane diisocyanate（MDI） was applied for the first time in the immobilization of 2,6-dimethyl-b-CD onto the surface of aminized silica gel under mild conditions. The composite materials obtained were used as the CSP for chiral separation processes and this kind of CSP exhibits good enantioselectivity for a variety of chiral compounds under reversed-phase conditions.

关键词： 2 6-Dimethyl-b-cyclodextrin Chiral stationary phase(CSP) Diphenylmethane diisocyanate(MDI) Chiral separation