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涡旋光束在水下湍流中传输的闪烁因子的实验研究

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光子学报 2019年第12期48卷 75-80页

作者：卢腾飞刘永欣蒲继雄华侨大学信息科学与工程学院福建省光传输与变换重点实验室

为了研究涡旋光束和高斯光束在水下湍流中的闪烁特性,搭建了一套含有水下湍流的实验系统,利用循环泵控制水槽内湍流的强弱,使用闪烁仪测量光束的闪烁因子.利用这套实验系统,详细研究了涡旋光束和高斯光束在水下传输时的闪烁因子.研究结... 详细信息

为了研究涡旋光束和高斯光束在水下湍流中的闪烁特性,搭建了一套含有水下湍流的实验系统,利用循环泵控制水槽内湍流的强弱,使用闪烁仪测量光束的闪烁因子.利用这套实验系统,详细研究了涡旋光束和高斯光束在水下传输时的闪烁因子.研究结果表明,涡旋光束和高斯光束的闪烁因子随着传输距离的增大而增大,并且随着水下湍流强度增大,涡旋光束和高斯光束对应的闪烁因子也越大.在12.6 m的传播距离内,拓扑电荷m=2的涡旋光束的闪烁因子远大于高斯光束的闪烁因子.另外,在不同强度的水下湍流中,拓扑荷数m=6的涡旋光束传播到5.4 m时,其径向闪烁因子都先减小然后再增大.此外,拓扑荷数m=6的涡旋光束经过一定距离的传播后,其闪烁因子低于拓扑荷数m=4的涡旋光束的闪烁因子.本文研究结果对探索涡旋光束在海洋湍流中的应用具有重要价值.

关键词：涡旋光束水下湍流闪烁因子拓扑荷数光强分布

Photoelectrochemical regeneration of all vanadium redox species for construction of a solar rechargeable flow cell

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Journal of Energy Chemistry 2018年第1期27卷 278-282页

作者： Shichao Liao jingying Shi chunmei Ding Mingyao Liu Fengqiang xiong Nan Wang jian Chen Can Li State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of Sciences Dalian National Laboratory for Clean Energy iCHEMDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China

Energy storage is pivotal for the continuous utilization of solar energy suffering from the intermittency issue. Herein, we demonstrate a solar rechargeable flow cell（SRFC） based on photoelectrochemical regeneration of vanadium redox species for in-situ solar energy harvest and storage. In this device, TiO_2 and MWCNT/acetylene black（MWCNT/AB） composite are served as the photoanode and the counter electrode,respectively, with all vanadium redox couples, VO_2~＋/VO^（2＋）and VO^（2＋）/V^（3＋）, as solar energy storage *** from solar energy, the cell can be photocharged under a bias as low as 0.1 V, which is much lower than the discharge voltage of ~0.5 V. Photocharged under the optimized condition, the cell delivers a discharge energy of 23.0 mWh/L with 67.4% input electric energy savings. This prototype work may inspire the rational design for cost-effective solar energy storage devices.

关键词： Photoelectrocatalysis Vanadium species Photocharge Solar energy storage

Resistive switching performance improvement of In GaZnO-based memory device by nitrogen plasma treatment

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Journal of Materials Science & Technology 2020年第14期47卷 1-6页

作者： Li Zhang Zhong Xu jia Han Lei Liu Cong Ye Yi Zhou Wen xiong Yanxin Liu Gang He Faculty of Physics and Electronic Science Hubei UniversityHubei Key Laboratory of Ferro-&Piezoelectric Materials and DevicesHubei Key Laboratory of Applied MathematicsWuhan430062China School of Physics and Materials Science Radiation Detection Materials&Device LabAnhui UniversityHefei230039China School of Microelectronics Tianjin Key Laboratory of Imaging and Sensing Microelectronic TechnologyTianjin UniversityTianjin300072China

With the demand of flat panel display development,utilizing the non-volatile memory devices based on indium-gallium-zinc-oxide(IGZO)film may be integrated with IGZO thin film transistors(TFTs)to accomplish system-on-panel *** this work,1×1μm^2 via hole structure IGZO based memory device was fabricated and the resistive switching(RS)behavior was *** inserting a nitrogen doping layer IGZO:N by plasma treatment in Pt/IGZO/Ti N device,highly improved RS performance including lower forming voltage,remarkable uniformity,large memory window of 102,retention property of 10^4 s at 125℃,excellent pulse endurance of 10^7 cycles were *** X-ray photoelectron spectroscopy analysis indicates that plasma doping method can evenly dope nitrogen and induce more non-lattice oxygen in the IGZO *** is deduced that the N atoms of the inserting layer can influence the random formation of oxygen vacancy type conducting filaments,which results in more stable and uniform performance.

关键词： Memory device Resistive switching Plasma treatment Indium-gallium-zinc-oxide Memristor

兽疫链球菌荚膜多糖PCP-I的制备、特性分析及其体外抗氧化活性

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食品与发酵工业 2014年第11期40卷 87-93页

作者：柯春林曾晓雄蚌埠学院生物与食品工程系安徽蚌埠233030 南京农业大学食品科技学院江苏南京210095

从兽疫链球菌C55129菌株发酵液中提取到荚膜多糖粗品(CCP),通过DEAE-52纤维素阴离子交换柱和Sephadex G-100凝胶柱层析,从CCP中分离到中性糖组分PCP-I,得率为5.989%,分子质量为0.029 2×103k Da。气相色谱法结果表明PCP-I单糖组成及摩... 详细信息

从兽疫链球菌C55129菌株发酵液中提取到荚膜多糖粗品(CCP),通过DEAE-52纤维素阴离子交换柱和Sephadex G-100凝胶柱层析,从CCP中分离到中性糖组分PCP-I,得率为5.989%,分子质量为0.029 2×103k Da。气相色谱法结果表明PCP-I单糖组成及摩尔比为阿拉伯糖∶甘露糖∶葡萄糖∶半乳糖=0.99∶27.03∶11.84∶1.00。体外抗氧化实验结果显示,PCP-I有较强的螯合金属离子能力、还原力和抑制脂质过氧化作用,适度的清除DPPH·、超氧阴离子自由基(O-2·)和羟自由基(·OH)活性的能力。

关键词：荚膜多糖理化特性抗氧化活性

Conformer Pair Contributions to Optical Rotations in a Series of Chiral Linear Aiiphatic Alcohols

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Chemical Research in Chinese Universities 2019年第1期35卷 109-119页

作者： ZHAO Dan REN jie xiong Yongfei DONG Mengxiang ZHU Huajie Charles U.PITTMAN.Jr. School of Pharmacy Hebei UniversityBaoding 071002P.R.China Department of Chemistry Mississippi State UniversityStarkville 39762MSUS

The chain length effect of four chiral aliphatic alcohols,(S)-2-butanol,(S)-2-pentanol,(S)-2-hexanol and (S)-2-heptanol,on their specific optical rotations(OR)was studied experimentally and theoretically via quantum *** conformations of each chiral alcohol exist as conformer pairs in *** OR sum from these pairs of conformers has much smaller contributions to OR values than that contributed by the most stable conformation. These four alcohols'OR values were also investigated using the matrix model,which employs each substituent's comprehensive mass,radii,electronegativity and symmetry number as the elements in the *** are all particle *** matrix determinant is proportional to its OR values within a closely related structural series of chiral *** experimental OR values and the matrix determinants of these four alcohols were compared with the predicted OR values obtained from quantum theory wave *** ORs predicted by the matrix method, which is based on particle function statistics,agreed with the results from quantum *** agreement between OR predictions by the matrix method and DFT calculations illustrates the wave-particle duality of polarized light that is operating in these predictions.

关键词： Optical rotation Absolute configuration Conformer pair Matrix model Quantum computation

Pyrolysis behaviour and combustion kinetics of waste printed circuit boards

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International Journal of Minerals,Metallurgy and Materials 2022年第9期29卷 1722-1732页

作者： Kang Yan Chongwei Liu Liping Liu Min xiong jiongtong Chen Zhongtang Zhang Shuiping Zhong Zhifeng Xu jindi Huang School of Metallurgy Engineering Jiangxi University of Science and TechnologyGanzhou 341000China Ganzhou Engineering Technology Research Center of Green Metallurgy and Process Intensification Ganzhou 341000China jiangxi College of Applied Technology Ganzhou 341000China Key Laboratory of Ionic Rare Earth Resources and Environment Ministry of Natural ResourcesGanzhou 341000China

The effective recycling of waste printed circuit boards(WPCBs)can conserve resources and reduce environmental *** study explores the pyrolysis and combustion characteristics of WPCBs in various atmospheres through thermogravimetric and Gaussian fitting ***,this study analyses the pyrolysis products and combustion processes of WPCBs through thermogravimetric and Fourier transform infrared analyses(TG-FTIR)and thermogravimetry-mass spectrometry(TG-MS).Results show that the pyrolysis and combustion processes of WPCBs do not constitute a single reaction,but rather an overlap of multiple *** pyrolysis and combustion process of WPCBs is divided into multiple reactions by Gaussian peak *** kinetic parameters of each reaction are obtained by the Coats-Redfern *** an argon atmosphere,pyrolysis consists of the overlap of the preliminary pyrolysis of epoxy resin,pyrolysis of small organic molecules,and pyrolysis of brominated flame *** thermal decomposition process in the O_(2) atmosphere is mainly divided into two reactions:brominated flame retardant combustion and epoxy *** study provided the theoretical basis for pollution control,process optimization,and reactor design of WPCBs pyrolysis.

关键词： waste printed circuit board pyrolysis mechanism combustion Gauss peak fitting

DRAM:A DRL-based resource allocation scheme for MAR in MEC

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Digital Communications and Networks 2023年第3期9卷 723-733页

作者： Tongyu Song Xuebin Tan jing Ren Wenyu Hu Sheng Wang Shizhong Xu xiong Wang Gang Sun Hongfang Yu School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengduPR China

Mobile Edge Computing(MEC)and 5G technology allow clients to access computing resources at the network frontier,which paves the way for applying Mobile Augmented Reality(MAR)*** the MEC paradigm,MAR clients can offload complex tasks to the MEC server and enhance the human perception of the world by merging the received virtual information with the real ***,the resource allocation problem arises as a critical challenge in circumstances where several MAR clients compete for limited resources at the network *** this paper,we aim to design an online resource allocation scheme on the MEC server that takes both high quality of experience and good fairness performance for MAR clients into *** first formulate this problem as a Markov decision process and tackle the challenge of applying the deep reinforcement learning ***,we propose DRAM,a Deep reinforcement learning-based Resource allocation scheme for mobile Augmented reality service in *** also propose a self-adaptive algorithm on the MAR client that is derived based on the analysis of the MAR service to tackle client adaptation *** simulation results demonstrated that DRAM can provide high quality of experience and simultaneously achieve good fairness performance by coordinating with clients’adaptation algorithms.

关键词： Mobile edge computing Mobile augmented reality Deep reinforcement learning Resource allocation

Viability of all-solid-state lithium metal battery coupled with oxide solid-state electrolyte and high-capacity cathode

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Journal of Energy Chemistry 2024年第4期91卷 122-131页

作者： Xingxing jiao Xieyu Xu Yongjing Wang Xuyang Wang Yaqi Chen Shizhao xiong Weiqing Yang Zhongxiao Song Yangyang Liu Research Institute of Frontier Science Southwest Jiaotong UniversityChengdu 610031SichuanChina State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong UniversityXi'an 710049ShaanxiChina Department of Physics Chalmers University of TechnologyGöteborgSE 41296Sweden

Owing to the utilization of lithium metal as anode with the ultrahigh theoretical capacity density of 3860 mA h g^(-1)and oxide-based ceramic solid-state electrolytes(SE),e.g.,garnet-type Li7La_(3)Zr_(2)O_(12)(LLZO),all-state-state lithium metal batteries(ASLMBs)have been widely accepted as the promising alternatives for providing the satisfactory energy density and ***,its applications are still challenged by plenty of technical and scientific *** this contribution,the co-sintering temperature at 500℃is proved as a compromise method to fabricate the composite cathode with structural integrity and declined capacity fading of LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)(NCM).On the other hand,it tends to form weaker grain boundary(GB)inside polycrystalline LLZO at inadequate sintering temperature for LLZO,which can induce the intergranular failure of SE during the growth of Li filament inside the unavoidable defect on the interface of ***,increasing the strength of GB,refining the grain to 0.4μm,and precluding the interfacial defect are suggested to postpone the electro-chemo-mechanical failure of SE with weak ***,the advanced sintering techniques to lower the co-sintering temperature for both NCM-LLZO composite cathode and LLZO SE can be posted out to realize the viability of state-of-the-art ASLMBs with higher energy density as well as the guaranteed safety.

关键词： All-solid-state lithium metal battery LiNi_(0.5C)o_(0.2)Mn_(0.3)O_(2)-Li7La_(3)Zr_(2)O_(12)composite cathode Co-sintering Lithium metal anode Electro-chemo-mechanical failure

Flexible cobalt phosphide network electrocatalyst for hydrogen evolution at all pH values

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Nano Research 2017年第3期10卷 1010-1020页

作者： jianwen Huang Yanrong Li YufeiXia Juntong Zhu Qinghua Yi Hao Wang jie xiong Yinghui Sun Guifu Zou State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of China Chengdu 610054 China College of Physics Optoelectronics and Energy Institute of Chemical Power Sources & Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University Suzhou 215006 China

High-performance electrocatalysts for water splitting at all pH values have attracted considerable interest in the field of sustainable hydrogen evolution. Herein, we report an efficient electrocatalyst with a nanocrystalline cobalt phosphide （COP） network for water splitting in the pH range of 0-14. The novel flexible electrocatalyst is derived from a desirable nanocrystalline CoP network grown on a conductive Hastelloy belt. This kind of self-supported CoP network is directly used as an electrocatalytic cathode for hydrogen evolution. The nanocrystalline network structure results in superior performance with a low onset overpotential of N45 mV over a broad pH range of 0 to 14 and affords a catalytic current density of 100 mA-cm 2 even in neutral media. The CoP network exhibits excellent catalytic properties not only at extreme pH values （0 and 14） but also in neutral media （pH = 7）, which is comparable to the behavior of state-of-the-art platinum-based metals. The system exhibits an excellent flexible property and maintains remarkable catalytic stability during continuous 100-h-long electrolysis even after 100 cycles of bending/extending from 100° to 250°.

关键词： hydrogen evolution CoP network nanocrystalline flexible all-pH