This paper presents an efficient and automated Overset Grid Assembly(OGA)method for the structured grid,and investigates high-order interpolation methods for inter-grid boundaries with the cell-centered finite differe...This paper presents an efficient and automated Overset Grid Assembly(OGA)method for the structured grid,and investigates high-order interpolation methods for inter-grid boundaries with the cell-centered finite difference method.Four enhancements are introduced:a hybrid holecutting approach integrates the efficiency of approximate hole-cutting and the accuracy and robustness of direct-cutting,effectively addressing challenges such as small gaps and thin cuts;an improved implicit hole boundary optimization method,incorporating quality comparison,can significantly reduce donor search workloads;an improved implicit interpolation cell cancellation algorithm minimizes overlap regions,particularly beneficial for high-order interpolation with large stencils;an algorithm for identifying and eliminating islands without using wall distances,effectively removes islands.The OGA results of a multi-element airfoil,a circular array of cylinders,multiple spheres,and a wing-pylon-store configuration indicate that the proposed method would be a suitable selection for multi-body problems,even in the presence of small gaps and thin geometries.Additionally,for high-order interpolation at inter-grid boundaries,this study presents an optimized interpolation method designed to minimize spectral property errors.Numerical results indicate that for periodic problems frequently crossing inter-grid boundaries,the optimized interpolation is more accurate than classical Lagrange interpolation and would be a suitable selection.展开更多
Social media rumors not only affect the health of online social networks,but also reduce the quality of information accessed by its users.In the case of emergencies,the rapid spread of rumors often triggers mass anxie...Social media rumors not only affect the health of online social networks,but also reduce the quality of information accessed by its users.In the case of emergencies,the rapid spread of rumors often triggers mass anxiety and panic.This study integrates the planned behavior(TPB)and deterrence(TD)theories to study the factors affecting the rumor recognition behavior of social media users.The structural equation model(SEM)method is used to test the proposed model.Further,the interaction between various factors is analyzed to evaluate their impact on the rumor recognition behavior exhibited by social media users in emergencies.The results demonstrate that certainty and severity have significant positive effects on subjective norms.In addition,subjective norms,attitude,and perceived behavioral control all affect the rumor recognition behavior of social media users,and involvement negatively moderates the relationship between the subjective norms and attitude.Finally,insights into the formulation of rumor control strategies during emergencies are presented based on the empirical analysis.展开更多
基金supported by the Foundation of State Key Laboratory of Aerodynamics of China(No.SKLA-2024-KFKT-1-008)the National Natural Science Foundation of China(No.91952203)。
文摘This paper presents an efficient and automated Overset Grid Assembly(OGA)method for the structured grid,and investigates high-order interpolation methods for inter-grid boundaries with the cell-centered finite difference method.Four enhancements are introduced:a hybrid holecutting approach integrates the efficiency of approximate hole-cutting and the accuracy and robustness of direct-cutting,effectively addressing challenges such as small gaps and thin cuts;an improved implicit hole boundary optimization method,incorporating quality comparison,can significantly reduce donor search workloads;an improved implicit interpolation cell cancellation algorithm minimizes overlap regions,particularly beneficial for high-order interpolation with large stencils;an algorithm for identifying and eliminating islands without using wall distances,effectively removes islands.The OGA results of a multi-element airfoil,a circular array of cylinders,multiple spheres,and a wing-pylon-store configuration indicate that the proposed method would be a suitable selection for multi-body problems,even in the presence of small gaps and thin geometries.Additionally,for high-order interpolation at inter-grid boundaries,this study presents an optimized interpolation method designed to minimize spectral property errors.Numerical results indicate that for periodic problems frequently crossing inter-grid boundaries,the optimized interpolation is more accurate than classical Lagrange interpolation and would be a suitable selection.
基金This work is supported by grants from National Natural Science Foundation of China under Grant No.71874025,71503033,and 62076114Humanities and Social Sciences Research Planning Foundation of the Ministry of Education under Grant No.20YJA630058.
文摘Social media rumors not only affect the health of online social networks,but also reduce the quality of information accessed by its users.In the case of emergencies,the rapid spread of rumors often triggers mass anxiety and panic.This study integrates the planned behavior(TPB)and deterrence(TD)theories to study the factors affecting the rumor recognition behavior of social media users.The structural equation model(SEM)method is used to test the proposed model.Further,the interaction between various factors is analyzed to evaluate their impact on the rumor recognition behavior exhibited by social media users in emergencies.The results demonstrate that certainty and severity have significant positive effects on subjective norms.In addition,subjective norms,attitude,and perceived behavioral control all affect the rumor recognition behavior of social media users,and involvement negatively moderates the relationship between the subjective norms and attitude.Finally,insights into the formulation of rumor control strategies during emergencies are presented based on the empirical analysis.
