Multi-energy microgrids(MEMG)play an important role in promoting carbon neutrality and achieving sustainable development.This study investigates an effective energy management strategy(EMS)for MEMG.First,an energy man...Multi-energy microgrids(MEMG)play an important role in promoting carbon neutrality and achieving sustainable development.This study investigates an effective energy management strategy(EMS)for MEMG.First,an energy management system model that allows for intra-microgrid energy conversion is developed,and the corresponding Markov decision process(MDP)problem is formulated.Subsequently,an improved double deep Q network(iDDQN)algorithm is proposed to enhance the exploration ability by modifying the calculation of the Q value,and a prioritized experience replay(PER)is introduced into the iDDQN to improve the training speed and effectiveness.Finally,taking advantage of the federated learning(FL)and iDDQN algorithms,a federated iDDQN is proposed to design an MEMG energy management strategy to enable each microgrid to share its experiences in the form of local neural network(NN)parameters with the federation layer,thus ensuring the privacy and security of data.The simulation results validate the superior performance of the proposed energy management strategy in minimizing the economic costs of the MEMG while reducing CO_2 emissions and protecting data privacy.展开更多
In response to the underutilization of energy and insufficient flexible operation capability of rural energy supply systems in China,this study proposes an optimal dispatch approach for a rural multi-energy supply sys...In response to the underutilization of energy and insufficient flexible operation capability of rural energy supply systems in China,this study proposes an optimal dispatch approach for a rural multi-energy supply system(RMESS)considering virtual energy storage(VES).First,to enable the flexible utilization of rural biomass resources and the thermal inertia of residential building envelopes,this study constructed VES-I and VES-II models that describe electrical-thermal and electrical-gas coupling from an electrical viewpoint.Subsequently,an RMESS model encompassing these two types of VES was formulated.This model delineates the intricate interplay of multi-energy components within the RMESS framework and facilitates the precise assessment of the adjustable potential for optimizing RMESS operations.Based on the above models,a day-ahead optimal dispatch model for an RMESS considering a VES is proposed to achieve optimal economic performance while ensuring efficient energy allocation.Comparative simulations validated the effectiveness of the VES modeling and the day-ahead optimal dispatch approach for the RMESS.展开更多
The novel Ready Player One shows Ernest Cline’s ability of space construction,and demonstrates charm and artistic value of the virtual fantasy space it depicts.It is a science fiction with perfect combination of ideo...The novel Ready Player One shows Ernest Cline’s ability of space construction,and demonstrates charm and artistic value of the virtual fantasy space it depicts.It is a science fiction with perfect combination of ideological content and artistic form.This thesis aims to discuss the Ernest Cline’s construction of the virtual pace and the real space in Ready Player One and the function of their construction.In real space,the environment is awful and dilapidated,and people’s lives are depressed.While in the virtual space,the world is colorful and people have varied ways of entertainment to fulfill their mind.This Thesis summarizes the effects brought by both the real space and virtual space for Ready Player One.With such a strong contrast,the conflict between the two spaces promotes the narrative process and also highlights the theme of the novel.展开更多
检索足球运动员力量与其它身体素质结合训练的相关文献,整合并评述结合训练的研究进展。在Web of science、PubMed、中国知网数据库检索2000———2023年发表的相关文献,依照排除和纳入标准最终得到文献36篇,其中力量结合耐力、协调、...检索足球运动员力量与其它身体素质结合训练的相关文献,整合并评述结合训练的研究进展。在Web of science、PubMed、中国知网数据库检索2000———2023年发表的相关文献,依照排除和纳入标准最终得到文献36篇,其中力量结合耐力、协调、速度、灵敏的文献分别为12、5、11、8篇。研究结果显示:①在力量与耐力结合训练方面,任意负荷强度均能提升非高水平运动员的力量和心肺功能,而精英运动员则需要次极限强度的刺激才能提升其专项力量、冲刺速度、灵敏性及有氧耐力,且课内训练内容的顺序效益相近;②在力量与协调结合训练方面,先进行动态或静态协调训练可为随后的高质量力量训练奠定基础,训练安排选用板块分期模式更为有效;③在力量与速度结合训练方面,超等长与速度相结合的日间交替安排有助于提高冲刺及跳跃能力,而课内交替练习对提升跳跃、冲刺和变向能力等专项力量和速度的效果良好;④在力量与灵敏结合训练方面,日常技战术训练中采用力量与灵敏的课内交替,可以提高其跳跃、冲刺、转向及平衡能力。综上所述,可以从阶段、周、课3个层次建构足球运动员多素质相结合的训练组织与安排。展开更多
基金supported by the Research and Development of Key Technologies of the Regional Energy Internet based on Multi-Energy Complementary and Collaborative Optimization(BE2020081)。
文摘Multi-energy microgrids(MEMG)play an important role in promoting carbon neutrality and achieving sustainable development.This study investigates an effective energy management strategy(EMS)for MEMG.First,an energy management system model that allows for intra-microgrid energy conversion is developed,and the corresponding Markov decision process(MDP)problem is formulated.Subsequently,an improved double deep Q network(iDDQN)algorithm is proposed to enhance the exploration ability by modifying the calculation of the Q value,and a prioritized experience replay(PER)is introduced into the iDDQN to improve the training speed and effectiveness.Finally,taking advantage of the federated learning(FL)and iDDQN algorithms,a federated iDDQN is proposed to design an MEMG energy management strategy to enable each microgrid to share its experiences in the form of local neural network(NN)parameters with the federation layer,thus ensuring the privacy and security of data.The simulation results validate the superior performance of the proposed energy management strategy in minimizing the economic costs of the MEMG while reducing CO_2 emissions and protecting data privacy.
基金supported by Science and Technology Project of SGCC(5108-202218280A-2-375-XG)。
文摘In response to the underutilization of energy and insufficient flexible operation capability of rural energy supply systems in China,this study proposes an optimal dispatch approach for a rural multi-energy supply system(RMESS)considering virtual energy storage(VES).First,to enable the flexible utilization of rural biomass resources and the thermal inertia of residential building envelopes,this study constructed VES-I and VES-II models that describe electrical-thermal and electrical-gas coupling from an electrical viewpoint.Subsequently,an RMESS model encompassing these two types of VES was formulated.This model delineates the intricate interplay of multi-energy components within the RMESS framework and facilitates the precise assessment of the adjustable potential for optimizing RMESS operations.Based on the above models,a day-ahead optimal dispatch model for an RMESS considering a VES is proposed to achieve optimal economic performance while ensuring efficient energy allocation.Comparative simulations validated the effectiveness of the VES modeling and the day-ahead optimal dispatch approach for the RMESS.
文摘The novel Ready Player One shows Ernest Cline’s ability of space construction,and demonstrates charm and artistic value of the virtual fantasy space it depicts.It is a science fiction with perfect combination of ideological content and artistic form.This thesis aims to discuss the Ernest Cline’s construction of the virtual pace and the real space in Ready Player One and the function of their construction.In real space,the environment is awful and dilapidated,and people’s lives are depressed.While in the virtual space,the world is colorful and people have varied ways of entertainment to fulfill their mind.This Thesis summarizes the effects brought by both the real space and virtual space for Ready Player One.With such a strong contrast,the conflict between the two spaces promotes the narrative process and also highlights the theme of the novel.
文摘检索足球运动员力量与其它身体素质结合训练的相关文献,整合并评述结合训练的研究进展。在Web of science、PubMed、中国知网数据库检索2000———2023年发表的相关文献,依照排除和纳入标准最终得到文献36篇,其中力量结合耐力、协调、速度、灵敏的文献分别为12、5、11、8篇。研究结果显示:①在力量与耐力结合训练方面,任意负荷强度均能提升非高水平运动员的力量和心肺功能,而精英运动员则需要次极限强度的刺激才能提升其专项力量、冲刺速度、灵敏性及有氧耐力,且课内训练内容的顺序效益相近;②在力量与协调结合训练方面,先进行动态或静态协调训练可为随后的高质量力量训练奠定基础,训练安排选用板块分期模式更为有效;③在力量与速度结合训练方面,超等长与速度相结合的日间交替安排有助于提高冲刺及跳跃能力,而课内交替练习对提升跳跃、冲刺和变向能力等专项力量和速度的效果良好;④在力量与灵敏结合训练方面,日常技战术训练中采用力量与灵敏的课内交替,可以提高其跳跃、冲刺、转向及平衡能力。综上所述,可以从阶段、周、课3个层次建构足球运动员多素质相结合的训练组织与安排。