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A data-based photonuclear simulation algorithm for determining specific activity of medical radioisotopes

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Nuclear Science and Techniques 2016年第5期27卷 160-167页

作者： wen luo Dimiter L.Balabanski Dan Filipescu School of Nuclear Science and Technology University of South ChinaHengyang 421001China Extreme Light Infrastructure-Nuclear Physics(ELI-NP)/"Horia Hulubei"National Institute for R&D in Physics and Nuclear Engineering(IFIN-HH) 30 Reactorului St.Bucharest-Magurelejud.IlfovP.O.B.MG-6077125 IasiRomania

For simulating more accurately neutron or proton production from photonuclear reactions,a data-based photonuclear reaction simulation algorithm has been *** photonuclear cross sections from evaluated or experimental database are chosen as input *** checking the validity of the use of the data-based photonuclear algorithm,benchmarking simulations are presented in *** calculate photonuclear cross sections or reaction yield for ~9Be,^(48)Ti,^(133)Cs,and ^(197)Au and compare them with experimental data in the region of incident photon energy below ~30 *** Geant4 can hardly reproduce photonuclear experimental data,results obtained from the data-based photonuclear algorithm are found in good agreement with experimental *** application in estimation of specific activity of radioisotopes is further *** conclude that the developed data-based photonuclear algorithm is suitable for an accurate prediction of photoninduced neutron or proton productions.

关键词：放射性同位素模拟算法医用光核反应实验数据 Geant4 光子能量输入数据

Antimony-based intermetallic compounds for lithium-ion and sodium-ion batteries:synthesis,construction and application

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Rare Metals 2017年第5期36卷 321-338页

作者： wen luo Jean-Jacques Gaumet Li-Qiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Laboratory of Chemistry and Physics:Multiscale Approach to Complex Environments(LCP-A2MC) University of LorraineMetz 57070France Department of Chemistry University of CaliforniaBerkeleyCalifornia 94720USA

The development of alternative electrode materials with high energy densities and power densities for batteries has been actively pursued to satisfy the power demands for electronic devices and hybrid electric vehicles. Recently, antimony（Sb）-based intermetallic compounds have attracted considerable research interests as new candidate anode materials for high-performance lithium-ion batteries（LIBs） and sodium-ion batteries（SIBs） due to their high theoretical capacity and suitable operating voltage. However, these intermetallic systems undergo large volume change during charge and discharge processes, which prohibits them from practical application. The rational construction of advanced anode with unique structures has been proved to be an effective approach to enhance its electrochemical performance. This review highlights the recent progress in improving and understanding the electrochemical performances of various Sb-based intermetallic compound anodes. The developments of synthesis and construction of Sb-based intermetallic compounds are systematically summarized. The electrochemical performances of various Sb-based intermetallic compound anodes are compared in its typical applications（LIBs or SIBs）.

关键词： Antimony Intermetallic compound Alloy Anode Sodium-ion battery Lithium-ion battery

Power duality for multi-antenna OFDM system in broadcast channel with user scheduling

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第2期9卷 215-224页

作者： Feng SHE Han-wen luo Lei CHEN Hua XIA Department of Electronic Engineering Shanghai Jiao Tong University Shanghai 200240 China Datang Microelectronics Technology Co. Ltd. Beijing 100083 China

This paper deals with design and analysis of user scheduling and power allocation for multi-antenna OFDM systems with DPC,ZF-DPC,ZF-BF and TDMA transmit *** consider the general multi-user downlink scheduling problem and power minimization with multi-user rate *** to the channel state,it is shown that there is a power optimal policy which selects a subset of users in each scheduling *** present user selection algorithms for DPC,ZF-DPC,ZF-BF and TDMA for multi-antenna OFDM system in broadcast channels,and we also present the practical water-filling solution in this *** the selected users with the consideration of fairness,we derive the power optimization algorithm with multi-user rate *** also analyze the power duality of uplink-downlink for the transmit strategies of DPC,ZF-DPC and *** results show that the present user-scheduling algorithm and power minimization algorithm can achieve good power performance,and that the scheduling algorithm can guarantee fairness.

关键词： Multiple-input multiple-output (MIMO) Orthogonal frequency division multiplexing (OFDM) Broadcast channel Multi-user diversity Dirty paper coding (DPC) Downlink scheduling

Advanced Li-SexSy battery system:Electrodes and electrolytes

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Journal of Materials Science & Technology 2020年第20期52卷 1-15页

作者： Huan Du Shihao Feng wen luo Liang Zhou Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan430070China Department of Physics School of ScienceWuhan University of TechnologyWuhan430070China

The worldwide energy shortage has led to numerous researches for the exploration of new-type battery materials to deal with the energy *** achieve a great leap in energy density,the study of high capacity electrode materials plays a major *** a replacement to the energy accumulation system of lithium-sulfur(Li-S) and lithium-selenium(Li-Se) batteries,great concern is generated over lithium/selenium-sulfur(Li-SexSy) batteries as they combine the advantages of S(high capacity) and Se(improved electrical conductivity),consequently stands for extensive new cathode *** recent years,widespread researches have been conducted and great achievements have been *** review sums up the research status on Li-SexSy batteries and concentrates on the outstanding work of SexSy cathode *** reaction mechanism and capacity fading mechanism are *** performance-structure relationship is stated in regard of different cathode structures,including a variety of carbon hosts,conducting polymer hosts,transition metal-doped carbon electrodes and various Se/S *** compatibilities of frequently-used carbonate-based and ether-based electrolyte and other new-type electrolytes for Li-SexSy battery are *** for the future developments of Li-SexSy batteries are finally proposed.

关键词： Selenium-sulfur Cathode materials Electrolytes Lithium-sulfur

Achieving better aqueous rechargeable zinc ion batteries with heterostructure electrodes

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Nano Research 2021年第9期14卷 3174-3187页

作者： Buke Wu wen luo Ming Li Lin Zeng Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Mechanical and Energy Engineering Southern University of Science and TechnologyShenzhen 518055China Department of Physics School of ScienceWuhan University of TechnologyWuhan 430070China Guangdong Provincial Key Laboratory of Energy Materials for Electric Power Southern University of Science and TechnologyShenzhen 518055China Key Laboratory of Energy Conversion and Storage Technologies(Southern University of Science and Technology) Ministry of EducationShenzhen 518055China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu hydrogen ValleyFoshan 528200China

Aqueous rechargeable zinc ion batteries(ARZIBs)have received unprecedented attention owing to the low cost and high-safety ***,their further development and application are hindered by the issues of electrodes such as cathode dissolution,zinc anode dendrite,passivation,as well as sluggish reaction *** heterostructure electrodes is a powerful method to improve the electrochemical performance of electrodes by grafting the advantages of functional materials onto the active *** this review,various modified heterostructure electrodes with optimized electrochemical performance and wider applications are ***,the synergistic effect between active materials and functional materials are also in-depth *** specific modification methods are divided into interphase modification(electrode-electrolyte interphase and electrode-current collector interphase)and structure ***,the conclusion and future perspective on the optimization mechanism of functional materials,and the cost issue of practical heterostructure electrodes in ARZIBs are also *** is expected that this review can promote the further development of ARZIBs towards practical utility.

关键词： zinc ion battery heterostructure electrodes interphase modification structure optimization

Staggering in Rotor Hamiltonians Without C_(4) Symmetry

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Chinese Physics Letters 1999年第5期16卷 342-344页

作者： luo wen-dong LI Xun-jun Department of Physics Central South University of TechnologyChangsha 410083

After a brief review of the negative results of the microscopic study,of both the Strutinsky shell correction method and Hartree-Fock approximation,for the C_(4) symmetry in nuclei,a proposed rotor Hamiltonian to simulate both the microscopic results and the staggering effect is investigated and the staggering resulting from the rotor Hamiltonians without C_(4) symmetry can be found.

关键词： Hamiltonian symmetry correction

Recent Advances on Graphene Quantum Dots for Electrochemical Energy Storage Devices

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Energy & Environmental Materials 2022年第1期5卷 201-214页

作者： Noura Zahir Pierre Magri wen luo Jean Jacques Gaumet Philippe Pierrat CNRS L2CM UMR 7053 Universit e de Lorraine LCP-A2MC EA4632 Institut Jean Barriol Universit e de Lorraine State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technologywuhan 430070china

Graphene quantum dots(GQDs)which are nanofragments of graphene with an average size between 2 and 50 nm have attracted much attention due to their outstanding properties such as high conductivity,high surface area,and good solubility in various *** combine the quantum confinement and edges effects and the properties of ***,GQDs offers a broad range of applications in various fields(medicine,energy conversion,and energy storage devices).This review will present the recent research based on the introduction of GQDs in batteries,supercapacitors,and microsupercapacitors as electrodes materials or mixed with an active material as an auxiliary ***,discussed on selected examples,summarize the electrochemical performances and finally,challenges and perspectives are recalled for the subsequent optimization strategy of electrode *** review is expected to appeal a broad interest on functional GQDs materials and promote the further development of high-performance energy storage device.

关键词： energy storage graphene quantum dots lithium ion batteries sodium ion batteries supercapacitor

Clinical application prospects and transformation value of dental follicle stem cells in oral and neurological diseases

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World Journal of Stem Cells 2023年第4期15卷 136-149页

作者： Chao Yang Xin-Ya Du wen luo Research and Development Department Shenzhen Uni-medica Technology Co.LtdShenzhen 518051Guangdong ProvinceChina Department of Stomatology The People’s Hospital of LonghuaShenzhen 518109Guangdong ProvinceChina Department of Stomatology The First Affiliated Hospital of Hainan Medical UniversityHaikou 570102Hainan ProvinceChina School of Stomatology Hainan Medical UniversityHaikou 571199Hainan ProvinceChina

Since dental pulp stem cells(DPSCs)were first reported,six types of dental SCs(DSCs)have been isolated and *** originating from the craniofacial neural crest exhibit dental-like tissue differentiation potential and neuroectodermal *** a member of DSCs,dental follicle SCs(DFSCs)are the only cell type obtained at the early developing stage of the tooth prior to *** follicle tissue has the distinct advantage of large tissue volume compared with other dental tissues,which is a prerequisite for obtaining a sufficient number of cells to meet the needs of clinical ***,DFSCs exhibit a significantly higher cell proliferation rate,higher colony-formation capacity,and more primitive and better anti-inflammatory effects than other *** this respect,DFSCs have the potential to be of great clinical significance and translational value in oral and neurological diseases,with natural advantages based on their ***,cryopreservation preserves the biological properties of DFSCs and enables them to be used as off-shelf products for clinical *** review summarizes and comments on the properties,application potential,and clinical transformation value of DFSCs,thereby inspiring novel perspectives in the future treatment of oral and neurological diseases.

关键词： Dental follicle stem cells Oral disease Neurological disease Tissue engineering Regeneration Immunoregulation

Shielding calculation for the thickness of the SR facility safety shutter

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Nuclear Science and Techniques 2006年第4期17卷 198-201页

作者： YU Zheng-Ping luo wen-Yun CHEN Tao Shanghai Applied Radiation Institute Shanghai University Shanghai 201800 China Shanghai Institute of Applied Physics the Chinese Academy of Sciences Shanghai 201800 China

The safety shutter of the SR (synchrotron radiation) facility located at the front end of the facility is an in- dispensable component for radiation protection. Its thickness is decided by the gas bremsstrahlung produced in the SR facility storage ring by the interaction of electrons with the residual gas molecules in the vacuum chamber of the storage ring. In the calculation, the 3.5 GeV, 300 mA electron beam and a 15 m long insertion-device straight section (0.133 μ Pa) were taken into account, and the safety shutter was assumed to be located 12 m away from the end of the straight section. The EGSnrc code based on the Monte-Carlo method and empirical formulas were used, respectively, to calculate the thickness to satisfy the shielding requirement of the safety shutter at the front end of the SR facility, and the results were compared and the availability of EGSnrc was proved.

关键词：同步加速器辐射设备防火档板蒙特卡洛法厚度