During the excavation of deep engineering,high in situ stress is one prominent feature that often causes instability in the vicinity of underground openings.The propagation and coalescence of cracks in the surrounding...During the excavation of deep engineering,high in situ stress is one prominent feature that often causes instability in the vicinity of underground openings.The propagation and coalescence of cracks in the surrounding rock are characterized by anisotropy under a true triaxial stress state and play a crucial role in the development of stress-induced engineering disasters.Thus,a three-dimensional anisotropic fracturing model of hard rock is proposed to interpret fracturing activities and evaluate the mechanical property deterioration under complex stress conditions.This anisotropic fracturing model is derived from the evolution of microcracks and attributes the inelastic deformation of hard rock to crack propagation and coalescence.Through analyzing the competitive process of crack propagation in different orientations,the stress-induced anisotropic fracturing characteristics and the post-peak brittle-ductile transition could be revealed.Finally,the accuracy and effectiveness of this model are validated.Results show that this proposed anisotropic fracturing model can elucidate the primary characteristics observed in triaxial compression tests,which offers a fresh perspective on comprehending the failure process of hard rock.展开更多
This paper proposes an asynchronous heterogeneous propagation approach of concurrent competitive waves for hyper-distributed hyper-parallel heuris tic problem-solving. This approach is much more powerful than the sync...This paper proposes an asynchronous heterogeneous propagation approach of concurrent competitive waves for hyper-distributed hyper-parallel heuris tic problem-solving. This approach is much more powerful than the synchronous homogeneous mechanisms and the asynchronous superimposition algorithms, and has universal validity and availability. The basic conception, concurrent algorithm and its properties are discussed. The theory and conclusions drawn in this paper are of essential importance for the hardware implementation of hyper-distributed hyper-parallel processing based on chaotic cellular networks.展开更多
It is our great pleasure to announce the awardees of 2024 Nano Research Young Innovators(NR45)in nanomaterial self-assembly.Nano Research initiated the NR45 program in 2018 to recognize outstanding young researchers u...It is our great pleasure to announce the awardees of 2024 Nano Research Young Innovators(NR45)in nanomaterial self-assembly.Nano Research initiated the NR45 program in 2018 to recognize outstanding young researchers under 45 years of age across diverse fields of nanoscience and nanotechnology.This initiative celebrates their exceptional achievements and potential to advance their respective disciplines through groundbreaking contributions.Awardees are selected via a rigorous competitive process by an award committee comprising members of the journal’s editorial board.The 2024 NR45 Awards focus on nanomaterial self-assembly,honoring 24 innovators for their transformative contributions to this dynamic field.This special issue features 12 review articles and 12 research papers from these distinguished awardees.展开更多
基金support from the National Natural Science Foundation of China(Grant No.52209125).
文摘During the excavation of deep engineering,high in situ stress is one prominent feature that often causes instability in the vicinity of underground openings.The propagation and coalescence of cracks in the surrounding rock are characterized by anisotropy under a true triaxial stress state and play a crucial role in the development of stress-induced engineering disasters.Thus,a three-dimensional anisotropic fracturing model of hard rock is proposed to interpret fracturing activities and evaluate the mechanical property deterioration under complex stress conditions.This anisotropic fracturing model is derived from the evolution of microcracks and attributes the inelastic deformation of hard rock to crack propagation and coalescence.Through analyzing the competitive process of crack propagation in different orientations,the stress-induced anisotropic fracturing characteristics and the post-peak brittle-ductile transition could be revealed.Finally,the accuracy and effectiveness of this model are validated.Results show that this proposed anisotropic fracturing model can elucidate the primary characteristics observed in triaxial compression tests,which offers a fresh perspective on comprehending the failure process of hard rock.
文摘This paper proposes an asynchronous heterogeneous propagation approach of concurrent competitive waves for hyper-distributed hyper-parallel heuris tic problem-solving. This approach is much more powerful than the synchronous homogeneous mechanisms and the asynchronous superimposition algorithms, and has universal validity and availability. The basic conception, concurrent algorithm and its properties are discussed. The theory and conclusions drawn in this paper are of essential importance for the hardware implementation of hyper-distributed hyper-parallel processing based on chaotic cellular networks.
文摘It is our great pleasure to announce the awardees of 2024 Nano Research Young Innovators(NR45)in nanomaterial self-assembly.Nano Research initiated the NR45 program in 2018 to recognize outstanding young researchers under 45 years of age across diverse fields of nanoscience and nanotechnology.This initiative celebrates their exceptional achievements and potential to advance their respective disciplines through groundbreaking contributions.Awardees are selected via a rigorous competitive process by an award committee comprising members of the journal’s editorial board.The 2024 NR45 Awards focus on nanomaterial self-assembly,honoring 24 innovators for their transformative contributions to this dynamic field.This special issue features 12 review articles and 12 research papers from these distinguished awardees.
