With the construction of the power Internet of Things(IoT),communication between smart devices in urban distribution networks has been gradually moving towards high speed,high compatibility,and low latency,which provi...With the construction of the power Internet of Things(IoT),communication between smart devices in urban distribution networks has been gradually moving towards high speed,high compatibility,and low latency,which provides reliable support for reconfiguration optimization in urban distribution networks.Thus,this study proposed a deep reinforcement learning based multi-level dynamic reconfiguration method for urban distribution networks in a cloud-edge collaboration architecture to obtain a real-time optimal multi-level dynamic reconfiguration solution.First,the multi-level dynamic reconfiguration method was discussed,which included feeder-,transformer-,and substation-levels.Subsequently,the multi-agent system was combined with the cloud-edge collaboration architecture to build a deep reinforcement learning model for multi-level dynamic reconfiguration in an urban distribution network.The cloud-edge collaboration architecture can effectively support the multi-agent system to conduct“centralized training and decentralized execution”operation modes and improve the learning efficiency of the model.Thereafter,for a multi-agent system,this study adopted a combination of offline and online learning to endow the model with the ability to realize automatic optimization and updation of the strategy.In the offline learning phase,a Q-learning-based multi-agent conservative Q-learning(MACQL)algorithm was proposed to stabilize the learning results and reduce the risk of the next online learning phase.In the online learning phase,a multi-agent deep deterministic policy gradient(MADDPG)algorithm based on policy gradients was proposed to explore the action space and update the experience pool.Finally,the effectiveness of the proposed method was verified through a simulation analysis of a real-world 445-node system.展开更多
Architecture is an indispensable part of the development of human civilization and the carrier of human civilization.The evolution of architectural style can also reflect the development of a nation.With the continuou...Architecture is an indispensable part of the development of human civilization and the carrier of human civilization.The evolution of architectural style can also reflect the development of a nation.With the continuous development of history,the preservation and development of historic sites has gradually become a topic of common concern in China and the west.However,with the continuous development of modern technology,there are fewer and fewer traditional cultural elements in the newly-built buildings,which lead to the gradual loss of some traditional architectural culture.In order to avoid the further aggravation of this phenomenon,something should be done.From the perspective of the development characteristics of Chinese and western architectural culture,the characteristics and differences of the development process of Chinese and western architecture were listed from ancient to modern times,and gradually the main reasons for the different development directions and characteristics were analyzed.In addition,according to the law and characteristics of the development of Chinese and western architecture,some methods on how to solve the inheritance of Chinese modern architecture to traditional culture were put forward.展开更多
Architecture is an indispensable part of the development of human civilization and the carrier of human civilization.The evolution of architectural style can also reflect the development of a nation.With the continuou...Architecture is an indispensable part of the development of human civilization and the carrier of human civilization.The evolution of architectural style can also reflect the development of a nation.With the continuous development of history,the preservation and development of historic sites has gradually become a topic of common concern in China and the west.However,with the continuous development of modern technology,there are fewer and fewer traditional cultural elements in the newly-built buildings,which lead to the gradual loss of some traditional architectural culture.In order to avoid the further aggravation of this phenomenon,something should be done.From the perspective of the development characteristics of Chinese and western architectural culture,the characteristics and differences of the development process of Chinese and western architecture were listed from ancient to modern times,and gradually the main reasons for the different development directions and characteristics were analyzed.In addition,according to the law and characteristics of the development of Chinese and western architecture,some methods on how to solve the inheritance of Chinese modern architecture to traditional culture were put forward.展开更多
文章探讨智慧城市与城市建筑设计的融合,通过分析智慧城市的定义和特征,围绕可持续发展、以用户体验为中心以及技术创新的原则,探讨新加坡的Marina Bay Sands、谷歌的Nest智能家居系统和迪拜的Burj Khalifa 3个智慧城市与城市建筑设计...文章探讨智慧城市与城市建筑设计的融合,通过分析智慧城市的定义和特征,围绕可持续发展、以用户体验为中心以及技术创新的原则,探讨新加坡的Marina Bay Sands、谷歌的Nest智能家居系统和迪拜的Burj Khalifa 3个智慧城市与城市建筑设计融合的实例。结果显示,智慧城市与城市建筑设计的融合能够促进城市的可持续发展,提升居民的生活体验和安全感。该融合是构建更高效、环保且人性化城市的关键步骤,对未来城市规划和建筑设计具有深远影响。展开更多
基金supported by the National Natural Science Foundation of China under Grant 52077146.
文摘With the construction of the power Internet of Things(IoT),communication between smart devices in urban distribution networks has been gradually moving towards high speed,high compatibility,and low latency,which provides reliable support for reconfiguration optimization in urban distribution networks.Thus,this study proposed a deep reinforcement learning based multi-level dynamic reconfiguration method for urban distribution networks in a cloud-edge collaboration architecture to obtain a real-time optimal multi-level dynamic reconfiguration solution.First,the multi-level dynamic reconfiguration method was discussed,which included feeder-,transformer-,and substation-levels.Subsequently,the multi-agent system was combined with the cloud-edge collaboration architecture to build a deep reinforcement learning model for multi-level dynamic reconfiguration in an urban distribution network.The cloud-edge collaboration architecture can effectively support the multi-agent system to conduct“centralized training and decentralized execution”operation modes and improve the learning efficiency of the model.Thereafter,for a multi-agent system,this study adopted a combination of offline and online learning to endow the model with the ability to realize automatic optimization and updation of the strategy.In the offline learning phase,a Q-learning-based multi-agent conservative Q-learning(MACQL)algorithm was proposed to stabilize the learning results and reduce the risk of the next online learning phase.In the online learning phase,a multi-agent deep deterministic policy gradient(MADDPG)algorithm based on policy gradients was proposed to explore the action space and update the experience pool.Finally,the effectiveness of the proposed method was verified through a simulation analysis of a real-world 445-node system.
文摘Architecture is an indispensable part of the development of human civilization and the carrier of human civilization.The evolution of architectural style can also reflect the development of a nation.With the continuous development of history,the preservation and development of historic sites has gradually become a topic of common concern in China and the west.However,with the continuous development of modern technology,there are fewer and fewer traditional cultural elements in the newly-built buildings,which lead to the gradual loss of some traditional architectural culture.In order to avoid the further aggravation of this phenomenon,something should be done.From the perspective of the development characteristics of Chinese and western architectural culture,the characteristics and differences of the development process of Chinese and western architecture were listed from ancient to modern times,and gradually the main reasons for the different development directions and characteristics were analyzed.In addition,according to the law and characteristics of the development of Chinese and western architecture,some methods on how to solve the inheritance of Chinese modern architecture to traditional culture were put forward.
文摘Architecture is an indispensable part of the development of human civilization and the carrier of human civilization.The evolution of architectural style can also reflect the development of a nation.With the continuous development of history,the preservation and development of historic sites has gradually become a topic of common concern in China and the west.However,with the continuous development of modern technology,there are fewer and fewer traditional cultural elements in the newly-built buildings,which lead to the gradual loss of some traditional architectural culture.In order to avoid the further aggravation of this phenomenon,something should be done.From the perspective of the development characteristics of Chinese and western architectural culture,the characteristics and differences of the development process of Chinese and western architecture were listed from ancient to modern times,and gradually the main reasons for the different development directions and characteristics were analyzed.In addition,according to the law and characteristics of the development of Chinese and western architecture,some methods on how to solve the inheritance of Chinese modern architecture to traditional culture were put forward.
文摘文章探讨智慧城市与城市建筑设计的融合,通过分析智慧城市的定义和特征,围绕可持续发展、以用户体验为中心以及技术创新的原则,探讨新加坡的Marina Bay Sands、谷歌的Nest智能家居系统和迪拜的Burj Khalifa 3个智慧城市与城市建筑设计融合的实例。结果显示,智慧城市与城市建筑设计的融合能够促进城市的可持续发展,提升居民的生活体验和安全感。该融合是构建更高效、环保且人性化城市的关键步骤,对未来城市规划和建筑设计具有深远影响。
