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( Zhao Shurong ),( Zhang Hong ) 한국행정학회 2010 한국행정학회 학술발표논문집 Vol.2010 No.-
Tourism Crisis Management embodies three phases, respectively from the viewpoint of crisis prevention, crisis management and crisis rehabilitation and summarization, this paper focuses on government behaviors in tourism crisis management after Wenchuan earthquake. Based on the analysis of current situation of Sichuan tourism restoration and reconstruction right after Wenchuan earthquake, the government`s roles , functions and involvement on Sichuan tourism crisis management and its effects was analyzed and evaluated. Therefore, the existing role of government and its behaviors and its future role orientation tendency on Sichuan tourism crisis management is further illustrated and studied.
Xiangzhe Kong,Shurong Ding,Hongyan Yang,Xiaoming Peng 한국원자력학회 2018 Nuclear Engineering and Technology Vol.50 No.8
High-density UMo/Zr monolithic nuclear fuel plates have a promising application prospect in high fluxresearch and test reactors. The solid state welding method called co-rolling is used for their fabrication. Hot co-rolling simulations for the composite blanks of UMo/Zr monolithic nuclear fuel plates are performed. The effects of coupon sizes and mechanical property parameters on the contact pressures betweenthe to-be-bonded surfaces are investigated and analyzed. The numerical simulation resultsindicate that 1) the maximum contact pressures between the fuel coupon and the Zircaloy cover existnear the central line along the plate length direction; as a whole the contact pressures decrease towardthe edges in the plate width direction; and lower contact pressures appear at a large zone near thecoupon corner, where de-bonding is easy to take place in the in-pile irradiation environments; 2) themaximum contact pressures between the fuel coupon and the Zircaloy parts increase with the initialcoupon thickness; after reaching a certain thickness value, the contact pressures hardly change, whichwas mainly induced by the complex deformation mechanism and special mechanical constitutive relationof fuel coupon; 3) softer fuel coupon will result in lower contact pressures and form interfaces beingmore out-of-flatness.
Yilei Lu,Shurong Wang,Xun Ma,Xin Xu,Shuai Yang,Yaobin Li,Zhen Tang 한국물리학회 2018 Current Applied Physics Vol.18 No.12
Recent study shows that the main reason for limiting CZTS device performance lies in the low open circuit voltage, and crucial factor that could affect the Voc is secondary phases like ZnS existing in absorber layer and its interfaces. In this work, the Cu2ZnSnS4 thin film solar cells were prepared by sputtering CuSn and CuZn alloy targets. Through tuning the Zn/Sn ratios of the CZTS thin films, the crystal structure, morphology, chemical composition and phase purity of CZTS thin films were characterized by X-Ray Diffraction (XRD), scanning electron microscopy (SEM) equipped with an energy dispersive spectrometer (EDS) and Raman spectroscopy. The statistics data show that the CZTS solar cell with a ratio of Zn/Sn=1.2 have the best power convention efficiency of 5.07%. After HCl etching process, the CZTS thin film solar cell with the highest efficiency 5.41% was obtained, which demonstrated that CZTS film solar cells with high efficiency could be developed by sputtering CuSn and CuZn alloy targets.
Robust Positive Consensus for Heterogeneous Multi-agent Systems
Ruonan Li,Yutao Tang,Shurong Li 제어·로봇·시스템학회 2024 International Journal of Control, Automation, and Vol.22 No.4
This paper investigates a robust positive consensus problem for a class of heterogeneous high-order multi-agent systems subject to external inputs. Compared with existing multi-agent consensus results, the most distinct feature of the formulated problem is that the state variables of all heterogeneous agents are confined in the positive orthant. To solve this problem, we present a two-step design procedure. By constructing an auxiliary multi-agent system as positive local reference generators, we incorporate the reference generator into an applicable decentralized robust tracking controller for each agent. The proposed distributed algorithm is proven to ensure a robust consensus fulfilling certain prescribed pattern for the multi-agent system under switching topology in the sense of finite-gain stability with respect to the external inputs. A simulation example is finally given to illustrate the effectiveness of our design.
Study of Earthquake Resilient RC Shear Wall Structures
Jiang, Huanjun,Li, Shurong Council on Tall Building and Urban Habitat Korea 2021 International journal of high-rise buildings Vol.10 No.3
A new type of earthquake resilient reinforced concrete (RC) shear wall structure, installed with replaceable coupling beams and replaceable corner components at the bottom of wall piers, is proposed in this study. At first, the mechanical behavior of replaceable components, such as combined dampers and replaceable corner component, is studied by cyclic loading tests on them. Then, cycling loading tests are conducted on one conventional coupled shear wall and one new type of coupled shear wall with replaceable components. The test results indicate that the damage of the new type of coupled shear wall concentrates on replaceable components and the left parts are well protected. Finally, a case study is introduced. The responses of one conventional frame-tube structure and one new type of structure installed with replaceable components under the wind and the earthquake are compared, which verify that the performance of new type of structure is much better than the conventional structure.
Spreading Shape and Area Regulate the Osteogenesis of Mesenchymal Stem Cells
Yang Zhao,Qing Sun,Shurong Wang,Bo Huo 한국조직공학과 재생의학회 2019 조직공학과 재생의학 Vol.16 No.6
BACKGROUND: Mesenchymal stem cells (MSCs) have strong self-renewal ability and multiple differentiation potential. Some studies confirmed that spreading shape and area of single MSCs influence cell differentiation, but few studies focused on the effect of the circularity of cell shape on the osteogenic differentiation of MSCs with a confined area during osteogenic process. METHODS: In the present study, MSCs were seeded on a micropatterned island with a spreading area lower than that of a freely spreading area. The patterns had circularities of 1.0 or 0.4, respectively, and areas of 314, 628, or 1256 lm2. After the cells were grown on a micropatterned surface for 1 or 3 days, cell apoptosis and F-actin were stained and analyzed. In addition, the expression of b-catenin and three osteogenic differentiation markers were immunofluorescently stained and analyzed, respectively. RESULTS: Of these MSCs, the ones with star-like shapes and large areas promoted the expression of osteogenic differentiation markers and the survival of cells. The expression of F-actin and its cytosolic distribution or orientation also correlated with the spreading shape and area. When actin polymerization was inhibited by cytochalasin D, the shaperegulated differentiation and apoptosis of MSCs with the confined spreading area were abolished. CONCLUSION: This study demonstrated that a spreading shape of low circularity and a larger spreading area are beneficial to the survival and osteogenic differentiation of individual MSCs, which may be regulated through the cytosolic expression and distribution of F-actin.
Xiaobin Jian,Xiangzhe Kong,Shurong Ding 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.6
Fracture near the Ue10Mo/cladding material interface impacts fuel service life. In this work, a mesoscalestress model is developed with the fuel foil considered as a porous medium having gas bubbles andbearing bubble pressure and surface tension. The models for the evolution of bubble volume fraction,size and internal pressure are also obtained. For a Ue10Mo/Al monolithic fuel plate under locationdependentirradiation, the finite element simulation of the thermo-mechanical coupling behavior isimplemented to obtain the bubble distribution and evolution behavior together with their effects on themesoscale stresses. The numerical simulation results indicate that higher macroscale tensile stressesappear close to the locations with the maximum increments of fuel foil thickness, which is intensivelyrelated to irradiation creep deformations. The maximum mesoscale tensile stress is more than 2 times ofthe macroscale one on the irradiation time of 98 days, which results from the contributions of considerablevolume fraction and internal pressure of bubbles. This study lays a foundation for the fracturemechanism analysis and development of a fracture criterion for Ue10Mo monolithic fuels.