We observed the coexistence of quantum anomalous Hall and valley Hall phases in the same photonic band gap. Under the broken time-reversal and parity symmetries, the phase transition between the two topological phases...
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Unmanned Aerial Vehicles (UAV) are widely used in military and civilian applications as an emerging control technology. Due to the stringent coordination requirements and constraints, multi-UAV path planning in three-...
High-altitude electromagnetic pulse (HEMP) can induce current and voltage on buried oil and gas pipelines, which may pose a threat to the pipeline's safe operation. In order to fully consider the simultaneous chan...
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Irregular driving behavior exhibited by drivers could result in road traffic accidents, posing significant risks and potential dangers. The implementation of real-time detection systems for identifying irregular drivi...
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When simulating the process from elastic–plastic deformation,damage to failure in a metal structure collision,it is necessary to use the large shell element due to the calculation efficiency,but this would affect the...
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When simulating the process from elastic–plastic deformation,damage to failure in a metal structure collision,it is necessary to use the large shell element due to the calculation efficiency,but this would affect the accuracy of damage evolution *** compensation algorithm adjusting failure strain according to element size is usually used in the damage model to deal with the *** this paper,a new nonlinear compensation algorithm between failure strain and element size was proposed,which was incorporated in the damage model GISSMO(Generalized incremental stress state dependent damage model)to characterize ductile *** associated material parameters were calibrated based on tensile experiments of aluminum alloy specimens with *** and experimental results show that the new compensation algorithm significantly reduces the dependence of element size compared with the constant failure strain model and the damage model with the linear compensation *** the axial splitting process of a circular tubular structure,the new compensation algorithm keeps the failure prediction errors low over the stress states ranging from shear to biaxial tension,and achieves the objective prediction of the damage evolution *** study demonstrates how the compensation algorithm resolves the contradiction between large element size and fracture prediction accuracy,and this facilitates the use of the damage model in ductile fracture prediction for engineering structures.
3D reconstruction and 2D observation were conducted to characterize the microstructure of the castings produced through high pressure die casting with different *** results indicate that shrinkage pores generally co-e...
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3D reconstruction and 2D observation were conducted to characterize the microstructure of the castings produced through high pressure die casting with different *** results indicate that shrinkage pores generally co-existed with externally solidified crystals(ESCs).In specimen produced without fast slow shot speed,big net-shrinkage pores accompanied with ESCs were found in the center of the *** the casting pressurization was introduced,the shrinkage pores gathered to the specimen center and became much less due to the optimization of melt *** more porosity was found near the gate rather than in the middle of the rod bar,especially gas ***filling process simulation reveals that the middle position of the bars wasfirstlyfilled and followed by the near gate position accompanied with one intense turbulentflow.
Gas disaster has always been a major safety problem in the coal mine field. The prediction of gas concentration in fully mechanized mining face is of great significance to ensure the safety of mine production and the ...
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Dielectric capacitors,serving as the indispensable components in advanced high-power energy storage devices,have attracted ever-increasing attention with the rapid development of science and *** various dielectric cap...
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Dielectric capacitors,serving as the indispensable components in advanced high-power energy storage devices,have attracted ever-increasing attention with the rapid development of science and *** various dielectric capacitors,ceramic capacitors with perovskite structures show unique advantages in actual application,e.g.,excellent adaptability in high-temperature *** the optimization of their energy storage performance has become a hot research topic *** review presents the basic principles of energy storage in dielectric ceramics and introduces multi-scale synergic optimization strategies according to the key factors for superior energy storage *** summarizing the common points in numerous works,several universal modification strategies are reviewed,and future research on fatigue fracture of ceramic capacitors under multi-field including but not limited to force,electric,and thermal coupling conditions is also anticipated.
In recent years, the number of stroke cases has been rising, and the rate of disability due to stroke is also increasing, particularly with more patients experiencing upper limb impairments. However, there is a signif...
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The cutting quality of intersecting lines can be affected by cutting model and cutting process. To improve that, this paper builds a round pipe-intersecting cutting model connected by branch pipe internally without gr...
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