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5161
Multivariate Stochastic Simulation of Wind-solar-hydro Resources Considering Spatio-temporal Correlations
Published 2021-01-01“…Complementary operation of wind-solar-hydro resources is an effective mean to promote the consumption of new energy and improve resource use efficiency.Synchronous simulation of wind-solar-hydro resources can provide reliable data for the planning,design,management and risk assessment of the complementary system.Taking ten million-kilowatt-class wind-solar-hydro complementary system upstream Yellow River as an example,after proposing a multivariate stochastic simulation method with consideration of spatio-temporal correlations between wind-solar-hydro resources,this paper firstly analyzes the spatio-temporal correlations of wind-solar-hydro resources,with runoff as the main variable,and wind power and photovoltaic power output as the slave variable for the stochastic simulation;secondly,simulates the runoff in different time series by a seasonal autoregressive model;finally,simulates the photovoltaic power output by the Copula function and conditional probability formula according to the correlation analysis between runoff and wind and photovoltaic power output,as well as the wind power output by a seasonal autoregressive model.The results show that the proposed method can accurately simulate the multivariable time series that can satisfy the historical statistical regularity.…”
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5162
Continuous Monitoring Analysis of Rice Quality in Southern China Based on Random Forest
Published 2022-01-01“…The results showed that amylose and chalkiness were the main contributory quality indexes of rice in South China, the upper reaches of the Yangtze River, and the middle and lower reaches of the Yangtze River. …”
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5163
Research on Innovation Performance in Heterogeneous Region: Evidence from Yangtze Economic Belt in China
Published 2020-01-01“…This paper uses DEA-Malmquist index to measure regional innovation performance of the Yangtze River Economic Belt in China. Regions of similar performance levels are grouped by ward clustering, analysis regional innovation performance characteristics, and problem-solving paths of regions in different development stages. …”
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5164
High-Quality Economic Development in Huaihe Economic Zone Level Measurement and Evaluation
Published 2021-01-01“…The results show that the following: (1) the overall high-quality development level of the Huaihe River Eco-Economic Zone is not high, and the overall time and space characteristics is “high in the east and low in the west”; (2) there is a positive spatial autonomy in urban competitiveness and the spatial distribution of the Huaihe River, and relevantly, the degree of closeness of spatial associations between cities is generally low; (3) the gap between the level of urban competitiveness in Jiangsu Province is shrinking, the development of other provinces has a time lag effect, and there are differences in the level of urban competitiveness. …”
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