面向无人机智能巡检的桥梁数字孪生系统需要集成与处理增量式的多模态数据,以支撑面向现实场景动态决策的高精度仿真需求。然而,现有数字孪生平台时空数据管理割裂、多模态数据融合不足、决策交互机制缺失,并未形成真正意义上的面向无...面向无人机智能巡检的桥梁数字孪生系统需要集成与处理增量式的多模态数据,以支撑面向现实场景动态决策的高精度仿真需求。然而,现有数字孪生平台时空数据管理割裂、多模态数据融合不足、决策交互机制缺失,并未形成真正意义上的面向无人机智能巡检的桥梁数字孪生系统。基于此,提出了一种融合IFC (Industry Foundation Classes)、知识图谱和游戏引擎的桥梁数字孪生系统。系统以基于IFC构建的知识图谱(IFC-graph)为核心的数据管理引擎,统一整合桥梁设计建造信息、无人机巡检规划所需的结构语义,以及巡检过程中获取的多模态感知数据(如点云、图像等),构建覆盖构件-子结构-区域等多空间尺度、支持全生命周期演化的增量式语义管理体系,并实现语义驱动下的高效信息检索与动态数据关联。在虚拟仿真层面,系统引入虚幻引擎构建高保真三维桥梁环境,精准复刻物理场景中的几何结构与环境要素,并通过与IFC知识图谱的双向联动机制,支持无人机路径规划、飞行策略模拟与多轮次巡检任务的交互式推演,能够真实还原飞行过程中的转向、避障与碰撞等复杂行为。基于上述系统框架,进一步提出一种融合构件语义的无人机巡检路径优化算法,有效提升路径规划的适应性与精度,实现面向关键构件的高分辨率检测。系统已在实际桥梁案例中完成部署与验证,结果表明:该方案具备良好的可扩展性与工程适用性,可为桥梁运维过程中的智能化分析与全生命周期管理提供新型解决思路与技术支撑。展开更多
This research discusses the core concepts,evolutionary trajectories,inherent differences and intrinsic interconnections between carbon-based and silicon-based life forms.On this basis,we further analyze the potential ...This research discusses the core concepts,evolutionary trajectories,inherent differences and intrinsic interconnections between carbon-based and silicon-based life forms.On this basis,we further analyze the potential risks brought by the unbalanced development of carbon and silicon economies.Then we point out a critical reality:although silicon-based life still depends on the assistance of carbon-based life for its evolution at present,the unconstrained growth of the silicon-based economy may ultimately undermine the survival and development of carbon-based economies and carbon-based life itself.We also give the solutions under our new theory,using the revenue and time saved from the silicon-based economy to subsidize the carbon-based economy,and producing more ecological products.The study proposes 6 strategic recommendations:(1)human society should establish a carbon-based life community;(2)environmental institutions produce more essential ecological products for the community,not only for human life;(3)all stakeholders take advantage of silicon-based life while also restricting its unlimited development;(4)countries and industries give full play to the positive role of the silicon-based economy in climate change mitigation and carbon-based life health;(5)relevant governance bodies enable AI to Participate in politics,assist in formulating policies and implement them fairly.(6)regions and economic entities develop diverse carbon-based economies based on the non-monetary trading system.展开更多
Layered oxides have attracted significant attention as cathodes for sodium-ion batteries(SIBs)due to their compositional versatility and tuneable electrochemical performance.However,these materials still face challeng...Layered oxides have attracted significant attention as cathodes for sodium-ion batteries(SIBs)due to their compositional versatility and tuneable electrochemical performance.However,these materials still face challenges such as structural phase transitions,Na^(+)/vacancy ordering,and Jahn–Teller distortion effect,resulting in severe capacity decay and sluggish ion kinetics.We develop a novel Cu/Y dual-doping strategy that leads to the formation of"Na–Y"interlayer aggregates,which act as structural pillars within alkali metal layers,enhancing structural stability and disrupting the ordered arrangement of Na^(+)/vacancies.This disruption leads to a unique coexistence of ordered and disordered Na^(+)/vacancy states with near-zero strain,which significantly improves Na^(+)diffusion kinetics.This structural innovation not only mitigates the unfavorable P2–O2 phase transition but also facilitates rapid ion transport.As a result,the doped material demonstrates exceptional electrochemical performance,including an ultra-long cycle life of 3000 cycles at 10 C and an outstanding high-rate capability of~70 mAh g^(−1)at 50 C.The discovery of this novel interlayer pillar,along with its role in modulating Na^(+)/vacancy arrangements,provides a fresh perspective on engineering layered oxides.It opens up promising new pathways for the structural design of advanced cathode materials toward efficient,stable,and high-rate SIBs.展开更多
Mycorrhizal symbioses are prevalent in terrestrial ecosystems and play essential roles in plant nutrition and health.However,the relative importance of plant evolutionary history,physiology,and eco-geographical factor...Mycorrhizal symbioses are prevalent in terrestrial ecosystems and play essential roles in plant nutrition and health.However,the relative importance of plant evolutionary history,physiology,and eco-geographical factors in shaping mycorrhizal fungal community assembly remains poorly understood.Here,we investigate how plant phylogeny,trophic mode,biogeographic distribution and environmental niche collectively influence the diversity and composition of mycorrhizal fungal communities across the Orchidaceae,spanning broad phylogenetic and ecological scales.By using family-wide orchid-fungal associations and global occurrence data,our analyses showed that the variation in fungal diversity and community structure can be partially explained by orchids’trophic mode,biogeographic distribution and environmental niche,but not by their overall phylogenetic relatedness.Among trophic modes,partially mycoheterotrophic orchids exhibited the highest level of fungal diversity(the lowest level of fungal specificity)in association with a broad range of phylogenetically dispersed fungal partners.Between biogeographical regions,a significantly higher level of fungal specificity was found for orchid species distributed in Australia than those in Eurasia and Africa.Furthermore,multivariate analyses showed that a small portion of the variation in fungal community structure was significantly related to broad climate,soil and vegetation variables,indicating the existence of large-scale habitat filtering on orchid mycorrhizal communities.Altogether,our findings indicate that mycorrhizal communities in the orchid family are likely shaped by multiple,intertwined factors related to orchid ecophysiology and biogeography on a global scale.展开更多
针对园区综合能源系统中存在多利益主体且收益分配不均的实际情况,提出一种基于混合博弈的双层能量管理模型。首先,建立园区综合能源系统的运行框架,分析上层微网运营商与下层用户聚合商的利益关系。其次,为使园区各主体利益最大化,构...针对园区综合能源系统中存在多利益主体且收益分配不均的实际情况,提出一种基于混合博弈的双层能量管理模型。首先,建立园区综合能源系统的运行框架,分析上层微网运营商与下层用户聚合商的利益关系。其次,为使园区各主体利益最大化,构建了多用户与微网运营商多方参与的混合博弈模型。其中,运营商通过主从博弈制定向用户的售能价格,用户聚合商在接收价格后基于纳什-海萨尼理论进行利益分配。然后,针对储能设备前期投入较高的实际情况,充分挖掘电动汽车的集群可调度潜力,通过卷积神经网络-双向长短期记忆网络(convolutional neural networks and Bi-directional long short-term memory,CNN-BiLSTM)法处理电动汽车的历史数据以降低不确定性,并制定了利用电动汽车共享储能特性作为储能设备的运行策略。最后,以某市园区综合能源系统为研究对象进行分析。结果表明,所建立的模型可以有效减少碳排放,实现运营商与多用户共赢。展开更多
分布式点对点(peer to peer,P2P)电能交易能促进能源就近达到供需平衡,在保证公平性的同时提高电网利用效率。该文提出P2P电能交易模型,并基于非对称纳什谈判(asymmetric nash bargaining,ANB)理论研究合作收益分配机制。首先,建立P2P...分布式点对点(peer to peer,P2P)电能交易能促进能源就近达到供需平衡,在保证公平性的同时提高电网利用效率。该文提出P2P电能交易模型,并基于非对称纳什谈判(asymmetric nash bargaining,ANB)理论研究合作收益分配机制。首先,建立P2P电能交易双方合作模型,二者通过合作产生合作剩余,然后基于非对称纳什谈判理论构建交易双方的收益分配模型,使得合作收益能在买卖双方间得到合理分配,最后通过算例验证所提合作博弈模型的有效性。仿真结果表明,交易双方通过合作,可以较大幅度提高各主体的运行效益以及合作联盟的整体效益,也能体现P2P电能交易卖方和买方在联盟中贡献大小的差异,可以更合理地分配合作收益。展开更多
文摘面向无人机智能巡检的桥梁数字孪生系统需要集成与处理增量式的多模态数据,以支撑面向现实场景动态决策的高精度仿真需求。然而,现有数字孪生平台时空数据管理割裂、多模态数据融合不足、决策交互机制缺失,并未形成真正意义上的面向无人机智能巡检的桥梁数字孪生系统。基于此,提出了一种融合IFC (Industry Foundation Classes)、知识图谱和游戏引擎的桥梁数字孪生系统。系统以基于IFC构建的知识图谱(IFC-graph)为核心的数据管理引擎,统一整合桥梁设计建造信息、无人机巡检规划所需的结构语义,以及巡检过程中获取的多模态感知数据(如点云、图像等),构建覆盖构件-子结构-区域等多空间尺度、支持全生命周期演化的增量式语义管理体系,并实现语义驱动下的高效信息检索与动态数据关联。在虚拟仿真层面,系统引入虚幻引擎构建高保真三维桥梁环境,精准复刻物理场景中的几何结构与环境要素,并通过与IFC知识图谱的双向联动机制,支持无人机路径规划、飞行策略模拟与多轮次巡检任务的交互式推演,能够真实还原飞行过程中的转向、避障与碰撞等复杂行为。基于上述系统框架,进一步提出一种融合构件语义的无人机巡检路径优化算法,有效提升路径规划的适应性与精度,实现面向关键构件的高分辨率检测。系统已在实际桥梁案例中完成部署与验证,结果表明:该方案具备良好的可扩展性与工程适用性,可为桥梁运维过程中的智能化分析与全生命周期管理提供新型解决思路与技术支撑。
基金supported by the Fund of China Scholarship Council(Grant No.202404180010).
文摘This research discusses the core concepts,evolutionary trajectories,inherent differences and intrinsic interconnections between carbon-based and silicon-based life forms.On this basis,we further analyze the potential risks brought by the unbalanced development of carbon and silicon economies.Then we point out a critical reality:although silicon-based life still depends on the assistance of carbon-based life for its evolution at present,the unconstrained growth of the silicon-based economy may ultimately undermine the survival and development of carbon-based economies and carbon-based life itself.We also give the solutions under our new theory,using the revenue and time saved from the silicon-based economy to subsidize the carbon-based economy,and producing more ecological products.The study proposes 6 strategic recommendations:(1)human society should establish a carbon-based life community;(2)environmental institutions produce more essential ecological products for the community,not only for human life;(3)all stakeholders take advantage of silicon-based life while also restricting its unlimited development;(4)countries and industries give full play to the positive role of the silicon-based economy in climate change mitigation and carbon-based life health;(5)relevant governance bodies enable AI to Participate in politics,assist in formulating policies and implement them fairly.(6)regions and economic entities develop diverse carbon-based economies based on the non-monetary trading system.
基金supported by the “Pioneer” and “Leading Goose” R&D Program of Zhejiang Province of China (No. 2024C01056)the support from London South Bank University
文摘Layered oxides have attracted significant attention as cathodes for sodium-ion batteries(SIBs)due to their compositional versatility and tuneable electrochemical performance.However,these materials still face challenges such as structural phase transitions,Na^(+)/vacancy ordering,and Jahn–Teller distortion effect,resulting in severe capacity decay and sluggish ion kinetics.We develop a novel Cu/Y dual-doping strategy that leads to the formation of"Na–Y"interlayer aggregates,which act as structural pillars within alkali metal layers,enhancing structural stability and disrupting the ordered arrangement of Na^(+)/vacancies.This disruption leads to a unique coexistence of ordered and disordered Na^(+)/vacancy states with near-zero strain,which significantly improves Na^(+)diffusion kinetics.This structural innovation not only mitigates the unfavorable P2–O2 phase transition but also facilitates rapid ion transport.As a result,the doped material demonstrates exceptional electrochemical performance,including an ultra-long cycle life of 3000 cycles at 10 C and an outstanding high-rate capability of~70 mAh g^(−1)at 50 C.The discovery of this novel interlayer pillar,along with its role in modulating Na^(+)/vacancy arrangements,provides a fresh perspective on engineering layered oxides.It opens up promising new pathways for the structural design of advanced cathode materials toward efficient,stable,and high-rate SIBs.
基金the funding provided by the China Scholarship Council(Grant No.201804910634)the Ecology Fund of the Royal Netherlands Academy of Arts and Sciences(KNAWWF/807/19039)to Deyi Wang.
文摘Mycorrhizal symbioses are prevalent in terrestrial ecosystems and play essential roles in plant nutrition and health.However,the relative importance of plant evolutionary history,physiology,and eco-geographical factors in shaping mycorrhizal fungal community assembly remains poorly understood.Here,we investigate how plant phylogeny,trophic mode,biogeographic distribution and environmental niche collectively influence the diversity and composition of mycorrhizal fungal communities across the Orchidaceae,spanning broad phylogenetic and ecological scales.By using family-wide orchid-fungal associations and global occurrence data,our analyses showed that the variation in fungal diversity and community structure can be partially explained by orchids’trophic mode,biogeographic distribution and environmental niche,but not by their overall phylogenetic relatedness.Among trophic modes,partially mycoheterotrophic orchids exhibited the highest level of fungal diversity(the lowest level of fungal specificity)in association with a broad range of phylogenetically dispersed fungal partners.Between biogeographical regions,a significantly higher level of fungal specificity was found for orchid species distributed in Australia than those in Eurasia and Africa.Furthermore,multivariate analyses showed that a small portion of the variation in fungal community structure was significantly related to broad climate,soil and vegetation variables,indicating the existence of large-scale habitat filtering on orchid mycorrhizal communities.Altogether,our findings indicate that mycorrhizal communities in the orchid family are likely shaped by multiple,intertwined factors related to orchid ecophysiology and biogeography on a global scale.
文摘针对园区综合能源系统中存在多利益主体且收益分配不均的实际情况,提出一种基于混合博弈的双层能量管理模型。首先,建立园区综合能源系统的运行框架,分析上层微网运营商与下层用户聚合商的利益关系。其次,为使园区各主体利益最大化,构建了多用户与微网运营商多方参与的混合博弈模型。其中,运营商通过主从博弈制定向用户的售能价格,用户聚合商在接收价格后基于纳什-海萨尼理论进行利益分配。然后,针对储能设备前期投入较高的实际情况,充分挖掘电动汽车的集群可调度潜力,通过卷积神经网络-双向长短期记忆网络(convolutional neural networks and Bi-directional long short-term memory,CNN-BiLSTM)法处理电动汽车的历史数据以降低不确定性,并制定了利用电动汽车共享储能特性作为储能设备的运行策略。最后,以某市园区综合能源系统为研究对象进行分析。结果表明,所建立的模型可以有效减少碳排放,实现运营商与多用户共赢。
文摘分布式点对点(peer to peer,P2P)电能交易能促进能源就近达到供需平衡,在保证公平性的同时提高电网利用效率。该文提出P2P电能交易模型,并基于非对称纳什谈判(asymmetric nash bargaining,ANB)理论研究合作收益分配机制。首先,建立P2P电能交易双方合作模型,二者通过合作产生合作剩余,然后基于非对称纳什谈判理论构建交易双方的收益分配模型,使得合作收益能在买卖双方间得到合理分配,最后通过算例验证所提合作博弈模型的有效性。仿真结果表明,交易双方通过合作,可以较大幅度提高各主体的运行效益以及合作联盟的整体效益,也能体现P2P电能交易卖方和买方在联盟中贡献大小的差异,可以更合理地分配合作收益。
