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RISS 인기검색어
- 검색키워드
- 저자 : Huanlin Zhou (검색결과 4 건)
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Improved Sine-cosine Algorithm for the Optimization Design of Truss Structures
Huanlin Zhou,Xiaomeng Yang,Ran Tao,Haolong Chen 대한토목학회 2024 KSCE Journal of Civil Engineering Vol.28 No.2
The sine cosine algorithm (SCA) is a new meta-heuristic algorithm. It has been proven to be very competitive compared with other meta-heuristic algorithms and has attracted significant attention from researchers in different fields. At present, there is no research on the application of SCA in the truss structure. In order to solve the truss optimization problem, the following improvements are made to SCA in this paper. Firstly, a non-linear conversion parameter is set to replace the linear conversion parameter, so that the exploration area is better in line with the characteristics of the actual optimization situation. Secondly, the Lévy flight is employed to enhance the algorithm's global search ability. Thirdly, a novel elite guidance strategy taking advantage of memory data is proposed to strengthen the local search ability. Finally, a greedy selection strategy is adopted for the selection of the candidate. Combining the finite element method, we apply ISCA to optimize the size, shape and topology of truss structures. The examples show that ISCA can use less calculation time, get better results, and also better stability. So, the ISCA is effective to solve the size, shape and topology optimization problems of truss structures.
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A hybrid numerical simulation method for typhoon wind field over complex terrain
Wenfeng Huang,Huanlin Zhou 한국풍공학회 2014 Wind and Structures, An International Journal (WAS Vol.18 No.5
In spite of progress in the numerical simulation of typhoon wind field in atmospheric boundary layer (ABL), using typhoon wind field model in conjunction with Monte Carlo simulation method can only accurately evaluate typhoon wind field over a general terrain. This method is not enough for a reliable evaluation of typhoon wind field over the actual complex terrain with surface roughness and topography variations. To predict typhoon wind field over the actual complex terrain in ABL, a hybrid numerical simulation method combined typhoon simulation used the typhoon wind field model proposed by Meng et al. (1995) and CFD simulation in which the Reynolds averaged Navier-Stokes (RANS) equations and k-e turbulence model are used. Typhoon wind filed during typhoon Dujuan and Imbudo are simulated using the hybrid numerical simulation method, and compared with the results predicted by the typhoon wind field model and the wind field measurement data collected by Fugro Geotechnical Services (FGS) in Hong Kong at the bridge site from the field monitoring system of wind turbulence parameters (FMS-WTP) to validate the feasibility and accuracy of the hybrid numerical simulation method. The comparison demonstrates that the hybrid numerical simulation method gives more accurate prediction to typhoon wind speed and direction, because the effect of topography is taken into account in the hybrid numerical simulation method.
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Hybrid Perovskite Photoconductivity Visible Region Detector with High Speed and Stability
Baoliang Mi,Huanlin Zhou,Zihang Song,Guiqing Zhao,Guoqing Tong,YANG JIANG 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2017 NANO Vol.12 No.12
Hybird perovskite materials have been regarded as an outstanding candidate in the optoelectronic devices. In this work, a high speed perovskite photodetector (PD) based on the gas–solid reaction process was proposed and a high responsivity and detectivity of 5.87A W -1, 10 12 Jones were obtained after annealing at 120℃ for 30 min. Compared to traditional solution process, the gas–solid reaction provided a full coverage film with high crystallization, which is beneficial to the electrons transportation and the capture of the incident light. The response time of device is up to 248 μs/207 μs under 700 Hz. More importantly, the device exhibits a good stability after storing in the air for two months. The perovskite PD shows a high performance upon the light illumination, revealing that the hybrid perovskite is a promising candidate for optoelectronic applications.
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A hybrid numerical simulation method for typhoon wind field over complex terrain
Huang, Wenfeng,Zhou, Huanlin Techno-Press 2014 Wind and Structures, An International Journal (WAS Vol.18 No.5
In spite of progress in the numerical simulation of typhoon wind field in atmospheric boundary layer (ABL), using typhoon wind field model in conjunction with Monte Carlo simulation method can only accurately evaluate typhoon wind field over a general terrain. This method is not enough for a reliable evaluation of typhoon wind field over the actual complex terrain with surface roughness and topography variations. To predict typhoon wind field over the actual complex terrain in ABL, a hybrid numerical simulation method combined typhoon simulation used the typhoon wind field model proposed by Meng et al. (1995) and CFD simulation in which the Reynolds averaged Navier-Stokes (RANS) equations and k-${\varepsilon}$ turbulence model are used. Typhoon wind filed during typhoon Dujuan and Imbudo are simulated using the hybrid numerical simulation method, and compared with the results predicted by the typhoon wind field model and the wind field measurement data collected by Fugro Geotechnical Services (FGS) in Hong Kong at the bridge site from the field monitoring system of wind turbulence parameters (FMS-WTP) to validate the feasibility and accuracy of the hybrid numerical simulation method. The comparison demonstrates that the hybrid numerical simulation method gives more accurate prediction to typhoon wind speed and direction, because the effect of topography is taken into account in the hybrid numerical simulation method.
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