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- 저자 : Jingang Liang (검색결과 4 건)
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Jingang Liang,Kan Wang,Yishu Qiu,Xiaoming Chai,Shenglong Qiang 한국원자력학회 2016 Nuclear Engineering and Technology Vol.48 No.3
Because of prohibitive data storage requirements in large-scale simulations, the memoryproblem is an obstacle for Monte Carlo (MC) codes in accomplishing pin-wise threedimensional(3D) full-core calculations, particularly for whole-core depletion analyses. Various kinds of data are evaluated and quantificational total memory requirements areanalyzed based on the Reactor Monte Carlo (RMC) code, showing that tally data, materialdata, and isotope densities in depletion are three major parts of memory storage. Thedomain decomposition method is investigated as a means of saving memory, by dividingspatial geometry into domains that are simulated separately by parallel processors. For thevalidity of particle tracking during transport simulations, particles need to be communicatedbetween domains. In consideration of efficiency, an asynchronous particle communicationalgorithm is designed and implemented. Furthermore, we couple the domain decompositionmethod with MC burnup process, under a strategy of utilizing consistent domain partition inboth transport and depletion modules. A numerical test of 3D full-core burnup calculationsis carried out, indicating that the RMC code, with the domain decomposition method, iscapable of pin-wise full-core burnup calculations with millions of depletion regions.
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Ginsenoside Rh2 Improves Learning and Memory in Mice
Jingang Hou,Jian Jie Xue,이미라,Lei Liu,Dong-Liang Zhang,Mengqi Sun,Yi-nan Zheng,성창근 한국식품영양과학회 2013 Journal of medicinal food Vol.16 No.8
A wide range of plant foods and dietary supplements are able to modify the functioning of the central nervous system. In the present study, we observed that oral administration of ginsenoside Rh2 (10 mg/mL) for 3 weeks significantly improved spatial learning and memory. Spatial memory and learning was evaluated in mice by hippocampus-dependent tasks (Morris water maze test) and immunohistochemical marker of cell genesis bromodeoxyuridine. Ginsenoside Rh2 treatment (30 days) promoted cell survival and genesis. Further, ginsenoside Rh2 treatment in enriched condition had no significant effects on cell survival compared with standard condition exposure. These results revealed that ginsenoside Rh2-mediated spatial learning and memory improvement was associated with cell genesis and survival and may be parallel to the mechanism of environmental enrichment. Therefore, ginsenoside Rh2 may have efficacy as a dietary supplement for spatial learning and memory improvement.
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Wang, Zihan,Pan, Shuang,Wang, Bing,Qi, Jingang,Tang, Lidan,Liu, Liang The Korean Electrochemical Society 2021 Journal of electrochemical science and technology Vol.12 No.3
In recent years, supercapacitors have been developed rapidly as a rechargeable energy storage device. And the performance of supercapacitors is depending on electrode materials, the preparation method and performance of electrode materials have become the primary goal of scientific development. This study synthesizes Co<sub>3</sub>O<sub>4</sub>@MnO<sub>2</sub>@PPy cathode material with porous pattern core-shell structure by hydrothermal method and electrodeposition. The result samples are characterized by X-ray diffraction transmission/scanning electron microscope, and X-ray photoelectron spectroscopy. Electrochemical evaluation reveals that electrochemical performance is significantly enhanced by PPy depositing. The specific capacitance of Co<sub>3</sub>O<sub>4</sub>@MnO<sub>2</sub>@PPy is 977 F g<sup>-1</sup> at 1 A g<sup>-1</sup>, the capacitance retention rate of 105%. Furthermore, the electrochemical performance of Co<sub>3</sub>O<sub>4</sub>@MnO<sub>2</sub>@PPy//AC asymmetric supercapacitor assembles with AC as the negative electrode material is significantly better than that of MnO<sub>2</sub>//AC and Co<sub>3</sub>O<sub>4</sub>@MnO<sub>2</sub>//AC. The capacity of Co<sub>3</sub>O<sub>4</sub>@MnO<sub>2</sub>@PPy//AC is 102.78 F g<sup>-1</sup>. The capacity retention rate is still 120% for 5000 charge-discharge cycles.
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Neutronic design and evaluation of the solid microencapsulated fuel in LWR
Deng Qianliang,Li Songyang,Wang Dingqu,Liu Zhihong,Xie Fei,Zhao Jing,Liang Jingang,Jiang Yueyuan 한국원자력학회 2022 Nuclear Engineering and Technology Vol.54 No.8
Solid Microencapsulated Fuel (SMF) is a type of solid fuel rod design that disperses TRISO coated fuel particles directly into a kind of matrix. SMF is expected to provide improved performance because of the elimination of cladding tube and associated failure mechanisms. This study focused on the neutronics and some of the fuel cycle characteristics of SMF by using OpenMC. Two kinds of SMFs have been designed and evaluated - fuel particles dispersed into a silicon carbide matrix and fuel particles dispersed into a zirconium matrix. A 7x7 fuel assembly with increased rod diameter transformed from the standard NHR200-II 9x9 array was also introduced to increase the heavy metal inventory. A preliminary study of two kinds of burnable poisons (Erbia & Gadolinia) in two forms (BISO and QUADRISO particles) was also included. This study found that SMF requires about 12% enriched UN TRISO particles to match the cycle length of standard fuel when loaded in NHR200-II, which is about 7% for SMF with increased rod diameter. Feedback coefficients are less negative through the life of SMF than the reference. And it is estimated that the average center temperature of fuel kernel at fuel rod centerline is about 60 K below that of reference in this paper
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