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Automatic data archiving and visualization at HLS-Ⅱ

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Nuclear Science and Techniques 2018年第9期29卷 179-184页

作者： Yi-Fan Song Chuan Li ke xuan Gong-Fa Liu National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029China

The control system of Hefei Light Source II(HLS-Ⅱ) is a distributed system based on the experimental physics and industrial control system(EPICS). It is necessary to maintain the central configuration files for the existing archiving system. When the process variables in the control system are added, removed, or updated, the configuration files must be manually modified to maintain consistency with the control system. This paper presents a new method for data archiving, which realizes the automatic configuration of the archiving parameters. The system uses microservice architecture to integrate the EPICS Archiver Appliance and Rec Sync. In this way, the system can collect all the archived meta-configuration from the distributed input/output controllers and enter them into the EPICS Archiver Appliance automatically. Furthermore, we also developed a web-based GUI to provide automatic visualization of real-time and historical data. At present,this system is under commissioning at HLS-Ⅱ. The results indicate that the new archiving system is reliable and convenient to operate. The operation mode without maintenance is valuable for large-scale scientific facilities.

关键词： Automatic archiving Data visualization Microservice architecture EPICS Archiver Appliance

Hybrid absorbing boundary condition based on transmitting boundary and its application in 3D fractional viscoacoustic modeling

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Petroleum Science 2023年第2期20卷 840-856页

作者： Song-Ling Li Ying Shi Ning Wang Wei-Hong Wang xuan ke School of Earth Sciences Northeast Petroleum UniversityDaqingHeilongjiang 163318China

An accurate numerical simulation for wave equations is essential for understanding of wave propagation in the earth's interior as well as full waveform inversion and reverse time migration. However, due to computational cost and hardware capability limitations, numerical simulations are often performed within a finite domain. Thus, an adequate absorbing boundary condition (ABC) is indispensable for obtaining accurate numerical simulation results. In this study, we develop a hybrid ABC based on a transmitting boundary, which is referred to as THABC, to eliminate artificial boundary reflections in 3D second-order fractional viscoacoustic numerical simulations. Furthermore, we propose an adaptive weighted coefficient to reconcile the transmitting and viscoacoustic wavefields in THABC. Through several numerical examples, we determine that the proposed THABC approach is characterized by the following benefits. First, with the same number of absorbing layers, THABC exhibits a better ability in eliminating boundary reflection than traditional ABC schemes. Second, THABC is more effective in computation, since it only requires the wavefields at the current and last time steps to solve the transmitting formula within the absorbing layers. Benefiting from a simple but effective combination between the transmitting equation and the second-order wave equation, our scheme performs well in the 3D fractional Laplacian viscoacoustic numerical simulation.

关键词： Hybrid absorbing boundary Numerical simulation Transmitting boundary Fractional viscoacoustic wave equation

Research on tune feedback of the Hefei Light SourceⅡbased on machine learning

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Nuclear Science and Techniques 2022年第3期33卷 45-52页

作者： Yong-Bo Yu Gong-Fa Liu Wei Xu Chuan Li Wei-Min Li ke xuan National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230029AnhuiChina

The theory of tune feedback correction and the principle of a feedback algorithm based on machine learning are introduced,with a focus on the application of lasso regression for tune feedback *** verification and online feedback correction results are *** results show that,after applying machine learning,the feedback accuracy of the tune feedback system was higher,and the betatron tune stability was further improved.

关键词： Storage ring Tune feedback Machine learning Lasso regression

Ion Transport Mechanism in ClC-Type Channel Protein under Complex Electrostatic Potential

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Wuhan University Journal of Natural Sciences 2016年第6期21卷 466-472页

作者： YU Tao GUO Xu ke xuan SANG Jianping Department of Physics Jianghan University School of Physics and Technology Wuhan University

In order to illustrate the ion transport mechanism of chloride channel（Cl C） protein,a type of Cl C protein,Cl C-ec1,from Escherichia coli is embedded into an explicit membranewater system by using software VMD. Then a parallel molecular dynamics（MD） simulation is employed to equilibrate the Cl C-ec1 structure for 27.5 ns at temperature 298.15 K. Based on this equilibrated structure,we compute the channel geometric size variation and electrostatic potential distribution along the channel. Meanwhile,Cl^- transport process is simulated using oriented random walk method under variable external potential. The simulation result shows that Cl^- transport velocity depends on the width of the narrowest channel region. Mutation of negative glutamate E148 can produce positive potential,which is beneficial for Cl^- transport,around external Cl^- binding region in the channel. The simulated current-voltage curves about Cl^- transporting in Cl C-ec1 protein agree with Jayaram＇s experimental results.

关键词： ion transport ClC channel protein molecular dynamics simulation random walk simulation

Research on manufacture technology of spherical fuel elements by dry-bag isostatic pressing

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Nuclear Science and Techniques 2022年第10期33卷 79-89页

作者： Zhen-Ming Lu Wen-ke Zhang Jie Zhang Xiang-Wen Zhou Kai-Hong Zhang Ma-Lin Liu xuan-ke Li Bing Liu Hubei Province key Laboratory of Coal Conversion and New Carbon Materials Wuhan University of Science and TechnologyWuhan 430081China Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy TechnologyTsinghua UniversityBeijing 100084China

The steady development of high-temperature gas-cooled reactors(HTRs) has increased the requirements for the production cost and quality of fuel elements. Green fuel element pressing is one of the key steps to increase the production capacity. This paper proposes a proprietary vacuum dry-bag isostatic pressing(DIP) apparatus. The structural change of the matrix graphite powder during the DIP process was examined by analyzing the density change of the matrix graphite spheres with pressure. The soft molding process was simulated using the finite element method. The dimensional changes in the spheres during the pressing, carbonization, and purification stages were explored. The performance of the fuel matrix produced by the DIP method was comprehensively examined. The fuel matrix met the technical requirements and its anisotropy was significantly reduced. The DIP method can significantly improve both the production efficiency and quality of fuel elements. This will play a key role in meeting the huge demand for fuel elements of HTRs and molten salt reactors.

关键词： Dry-bag isostatic pressing High-temperature gas-cooled reactor(HTR) Spherical fuel element Finite element simulation Soft molding

Novel design of a personnel safety system for Hefei Light Source-Ⅱ

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Nuclear Science and Techniques 2019年第6期30卷 114-121页

作者： Zi-Yu Huang ke xuan Chuan Li Ji-Gang Wang Gong-Fa Liu National Synchrotron Radiation Laboratory University of Science and Technology of China

The Hefei Light Source-Ⅱ(HLS-Ⅱ) is a vacuum ultraviolet synchrotron light source. The personnel safety system (PSS), which is a personnel access control system, is a crucial part of the HLS-Ⅱ, as it protects the staff and users at HLS-Ⅱfrom radiation damages. The prior version of HLS-Ⅱ PSS was based on an access control system called SiPass. This lacked the personnel management function. Meanwhile, as the prior PSS is a turn-key system, it was not effective for sharing information. To overcome these drawbacks, the novel design of PSS for HLS-Ⅱ is proposed based on the Siemens redundant programmable logic controller under the Experimental Physics and Industrial Control System. The proposed PSS consists of a safety interlock system, access control system, and a radiation monitoring system. The safety interlock system is used to define the interlock logic. The access control system is designed to restrict the access of staff and users at HLS-Ⅱ, and to provide a personnel management function. The radiation monitoring system is used to monitor the radiation dose rate in both the light source and the surrounding areas. This paper details the architecture and the specific design of the novel PSS. The off-line test results demonstrate that the proposed system has achieved the design objectives.

关键词： Personnel safety system Personnel management Redundant programmable logic controller PROFINET Experimental Physics and Industrial Control System

Escaped and Trapped Emission of Organic Light-Emitting Diodes

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Chinese Physics Letters 2012年第2期29卷 108-111页

作者： LIANG Shi-Xiong WU Zhao-Xin ZHAO xuan-ke HOU Xun key Laboratory of Photonics Technology for Information Key Laboratory for Physical Electronics and Devices(Ministry of Education)School of Electronic and Information EngineeringXi’an Jiaotong UniversityXi’an 710049

By locating the emitters around the first and second antinode of the metal electrode,the escaped and trapped emission of small molecule based bottom emission organic light-emitting diodes is investigated by using an integrating sphere,a fiber spectrometer and a glass *** is found that the external coupling ratio by locating the emitters at the second antinode (at a distance of 220 nm from the cathode) is 70%,which is higher than that of an emitter at the first antinode (60nm from the cathode) in theory and *** the "half-space" dipole model by taking the dipole radiation pattern into account,we also calculate the optical coupling efficiency for the emitter at both the first and second *** experimental and theoretical results will benefit the optimization of device structures for the higher out-coupling efficiency.

关键词： emitter coupling locating

A novel electrolytic-manganese-residues-and-serpentine-based composite(S-EMR) for enhanced Cd(Ⅱ) and Pb(Ⅱ) adsorption in aquatic environment

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Rare Metals 2023年第1期42卷 346-358页

作者： Meng-Yu Ma xuan ke Yan-Chang Liu Zhi-Hao Ha Ting Wang Jia Li Fan Zhang Tian C.Zhang College of Resources and Environmental Science South-Central Minzu UniversityWuhan430074China School of Chemistry and Environmental Engineering Wuhan Institute of TechnologyWuhan430074China College of Engineering University of Nebraska-LincolnOmahaNE68182USA

Electrolytic manganese residue(EMR) is the waste slag generated from the electrolysis manganese *** a promising exploitable adsorbent,EMR has become a hot research ***,EMR’s low adsorption capacity has limited its applications as an efficient *** this study,the EMR was mixed with serpentine and calcined(at 800℃ for 2 h) to prepare a composite adsorbent(S-EMR) with its specific surface area of 11.998 m^(2)·g^(-1)(increased compared to the original EMR) and improved adsorption capacities for Cd^(2+)(98.05 mg·g^(-1)) and Pb^(2+)(565.81 mg·g^(-1)).Kinetic studies have shown that the pseudo-first-order kinetics(PSO)model could best describe the adsorption kinetics of S-EMR for Cd^(2+)/Pb^(2+),implying that the chemisorption process is the rate-limiting *** effects of different interfering ions on S-EMR’ s adsorption for Cd^(2+)/Pb^(2+)may be due to the difference in their *** of response surface methodology tests showed that pH had the highest influence on adsorption,and the removal efficiency of S-EMR reached 99.92% for Cd(Ⅱ) and 94.00%for Pb(Ⅱ).X-ray photoelectron spectroscopy(XPS) analyses revealed that chemical precipitation was the predominant mechanism for Cd^(2+)/Pb^(2+)removal,and the adsorption mechanisms were associated with ion exchange and electrostatic *** results showed that S-EMR could be used as an effective adsorbent for the removal of Cd(Ⅱ)/Pb(Ⅱ) from water bodies,rendering dual benefits of pollution control and resource recovery.

关键词： Cadmium Lead Electrolytic manganese residue Serpentine Heavy metals

Cloning and Expressional Studies of the Voltage-dependent Anion Channel Gene from Brassica rapa L.

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Journal of Integrative Plant Biology 2006年第2期48卷 197-203页

作者： Jiang Wang Li-Da Zhang Kai-Jing ZUO Hong-Mei Qian You-Fang Cao ke-xuan Tang Plant Biotechnology Research Center Fudan-Shanghai Jiao Tong University-Nottingham Plant Biotechnology R＆D Center School of Agriculture and Biology Shanghai Jiao Tong University Shanghai 200030 China State key Laboratory of Genetic Engineering Fudan-Shanghai Jiao Tong University-Nottingham Plant Biotechnology R＆D Center School of Life Sciences Morgan-Tan International Center for Life Sciences Fudan University Shanghai 200433 China

The voltage-dependent anion channel （VDAC） plays an essential role in the permeability of mltochondrial membrane. In the present study, we isolated a novel VDAC gene （brvdac） based on the assembly of expressed sequence tag sequences from Brassica rapa L. and explored its differential expression patterns In growth, tissues, abiotlc stress, and stress recovery. Results of a tissue-specific expression study in young seedlings Indicated that, of all tissues tested, brvdac expression was the highest in the leaves. Under cold, drought, and salt stresses, brvdac expression showed a transient Increase, and then returned to normal levels when the stress was removed. When plants were exposed to heat shock, there was no Increase in brvdac expression, whereas during recovery a quick and considerable increase in expression was observed. These observations indicate that dissimilar modulations of brvdactranscription may occur when plant cells encounter heat shock and the other three types of stress. In addition, phylogenetic analysis Implied that an earlier duplication of vdac probably occurred before the divergence between monocotyledons and dicotyledons.

关键词： Brassica rapa expression heat shock stress voltage-dependent anion channel.