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- 저자 : Zhongqin Li (검색결과 5 건)
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The Fuzzy Prediction Control Methods of Crop Growth Process
Lan Wu,Zhongqin Li,Yanbo Hui 보안공학연구지원센터 2016 International Journal of Multimedia and Ubiquitous Vol.11 No.5
Today the huge demand for high-quality crops allowed the research on the improvement of crop quality and cultivation techniques to give increasing attention. Through effective variety selection and optimal control of the growth process, maintaining the long-term best growth environment is an important means to improve crop quality and yield. Due to the quality of the wheat crop ecological variability and complexity of the formation process, the effective forecasting and management under different conditions of wheat growth process becomes quite difficult. Aiming to the characteristics, such as nonlinear, time-varying, strong correlation, time-delay and more uncertainty, between the crop quality and various influencing factors, a modeling method of nonlinear dynamic multi-input multi-output system based on PLS and TS model is proposed. On this basis, a Generalized Predictive Controller (GPC) under implicit variable space is designed, which is provide a scientific basis for the realization of effective crop forecasting and control, to increase production, improve quality , regulating the growth cycle and increase economic efficiency purposes. The test results show that this method can effectively track the signal and meet the system demand.
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Different Climate Regimes Over the Coastal Regions of the Eastern Antarctic Ice Sheet
Cunde, Xiao,Dahe, Qin,Zhongqin, Li,Jiawen, Ren,Allison, Ian Korea Institute of Ocean ScienceTechnology 2002 Ocean and Polar Research Vol.24 No.3
For ten firn cores, from both the eastern and the western side of Lambert Glacier basin (LGB), snow accumulation rate and isotopic temperature were measured far the recent 50 years. Results show that snow accumulation for five cores over the eastern side of LGB (GC30, GD03, GD15, DT001, and DT085) at Wilks Land and Princess Elizabeth Land increases, whereas it decreases at the western side (Core E, DML05, W200, LGB 16, and MGA) at Dronning Maud Land, Mizuho Plateau and Kamp Land. For the past decades, the increasing rate was $0.34-2.36kg\;m^{-2}a^{-1}$ at the eastern side and the decreasing rate was $-0.01\;-\;-2.36kg\;m^{-2}\;a^{-1}$ at the western side. Temperatures at the eastern LGB were also increased with the rate of $0.02%o\;a^{-l}$. At the western LGB it was difficult to see clear trends, which were confirmed by Instrumental temperature records at coastal stations. Although statistic analysis and modeling results display that both surface temperature and accumulation rate has increased trends in Antarctic ice sheet during 1950-2000, the regional distributions were much more different for different geographic areas. We believe that ice-core records at Wilks Land and Princess Elizabeth Land reflect the real variations of SST and moisture change in the southern India Ocean. For the Kamp Land and Dronning Maud Land, however circulation pattern was different, by which the climate was more complicated. The International Trans-Antarctic Scientific Expedition (ITASE) aimed to reveal an overall spatial pattern of climate change over Antarctic ice sheet for the past 200 years. This study points the importance of continental to regional circulation to annual-decadal scale climate change in Antarctica.
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Different Climate Regimes Over the Coastal Regions of the Eastern Antarctic Ice Sheet
Xiao Cunde,Qin Dahe,Li Zhongqin,Ren Jiawen,Ian Allison 한국해양과학기술원 2002 Ocean and Polar Research Vol.24 No.3
For ten firn cores, from both the eastern and the western side of Lambert Glacier basin (LGB), snow accumulation rate and isotopic temperature were measured for the recent 50 years. Results show that snow accumulation for five cores over the eastern side of LGB (GC30, GD03, GD15, DT001, and DT085) at Wilks Land and Princess Elizabeth Land increases, whereas it decreases at the western side (Core E, DML05, W200, LGB16, and MGA) at Dronning Maud Land, Mizuho Plateau and Kamp Land. For the past decades, the increasing rate was 0.34-2.36 kg m2 a1 at the eastern side and the decreasing rate was 0.01-2.36 kg m2 a1 at the western side. Temperatures at the eastern LGB were also increased with the rate of 0.02‰ a1. At the western LGB it was difficult to see clear trends, which were confirmed by instrumental temperature records at coastal stations. Although statistic analysis and modeling results display that both surface temperature and accumulation rate has increased trends in Antarctic ice sheet during 1950-2000, the regional distributions were much more different for different geographic areas. We believe that ice-core records at Wilks Land and Princess Elizabeth Land reflect the real variations of SST and moisture change in the southern India Ocean. For the Kamp Land and Dronning Maud Land, however, circulation pattern was different, by which the climate was more complicated. The International Trans-Antarctic Scientific Expedition (ITASE) aimed to reveal an overall spatial pattern of climate change over Antarctic ice sheet for the past 200 years. This study points the importance of continental to regional circulation to annual-decadal scale climate change in Antarctica.
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