Under complex flight conditions,such as obstacle avoidance and extreme sea state,wing-in-ground(WIG)effect aircraft need to ascend to higher altitudes,resulting in the disappearance of the ground effect.A design of hi...Under complex flight conditions,such as obstacle avoidance and extreme sea state,wing-in-ground(WIG)effect aircraft need to ascend to higher altitudes,resulting in the disappearance of the ground effect.A design of high-speed WIG airfoil considering non-ground effect is carried out by a novel two-step inverse airfoil design method that combines conditional generative adversarial network(CGAN)and artificial neural network(ANN).The CGAN model is employed to generate a variety of airfoil designs that satisfy the desired lift-drag ratios in both ground effect and non-ground effect conditions.Subsequently,the ANN model is utilized to forecast aerodynamic parameters of the generated airfoils.The results indicate that the CGAN model contributes to a high accuracy rate for airfoil design and enables the creation of novel airfoil designs.Furthermore,it demonstrates high accuracy in predicting aerodynamic parameters of these airfoils due to the ANN model.This method eliminates the necessity for numerical simulations and experimental testing through the design procedure,showcasing notable efficiency.The analysis of airfoils generated by the CGAN model shows that airfoils exhibiting high lift-drag ratios under both flight conditions typically have cambers of among[0.08c,0.105c],with the positions of maximum camber occurring among[0.35c,0.5c]of the chord length,and the leading-edge radiuses of these airfoils primarily cluster among[0.008c,0.025c]展开更多
This study examines stylistic features of the news story comments from major online news outlets and their possible ef fects on the evolution of the English language.With a corpus composed of 34 examples drawn from re...This study examines stylistic features of the news story comments from major online news outlets and their possible ef fects on the evolution of the English language.With a corpus composed of 34 examples drawn from renowned news sites such as The Washington Post,The Economist,Wall Street Journal,CNN and NBC,a detailed analysis on the stylistic features and effects of the news story comments has been conducted for the purpose of discovering possible links between a poster’s linguistic behav ior and his thought process.The result shows that interrogative,noun phrase and verb phrase are commonly used in news story comments by virtue of their slightly ostentatious nature.Rhetorical devices such as metaphor,simile and parataxis are frequently employed among comments.And the relationship between a poster’s educational background and his postings is also touched up on at the end of this study.展开更多
基金supported by the Priority Academic Program Development of Jiangsu Higher Education Institutions,the Fundamental Research Funds for the Central Universities(No.ILA220101A23)CARDC Fundamental and Frontier Technology Research Fund(No.PJD20200210)the Aeronautical Science Foundation of China(No.20200023052002).
文摘Under complex flight conditions,such as obstacle avoidance and extreme sea state,wing-in-ground(WIG)effect aircraft need to ascend to higher altitudes,resulting in the disappearance of the ground effect.A design of high-speed WIG airfoil considering non-ground effect is carried out by a novel two-step inverse airfoil design method that combines conditional generative adversarial network(CGAN)and artificial neural network(ANN).The CGAN model is employed to generate a variety of airfoil designs that satisfy the desired lift-drag ratios in both ground effect and non-ground effect conditions.Subsequently,the ANN model is utilized to forecast aerodynamic parameters of the generated airfoils.The results indicate that the CGAN model contributes to a high accuracy rate for airfoil design and enables the creation of novel airfoil designs.Furthermore,it demonstrates high accuracy in predicting aerodynamic parameters of these airfoils due to the ANN model.This method eliminates the necessity for numerical simulations and experimental testing through the design procedure,showcasing notable efficiency.The analysis of airfoils generated by the CGAN model shows that airfoils exhibiting high lift-drag ratios under both flight conditions typically have cambers of among[0.08c,0.105c],with the positions of maximum camber occurring among[0.35c,0.5c]of the chord length,and the leading-edge radiuses of these airfoils primarily cluster among[0.008c,0.025c]
文摘This study examines stylistic features of the news story comments from major online news outlets and their possible ef fects on the evolution of the English language.With a corpus composed of 34 examples drawn from renowned news sites such as The Washington Post,The Economist,Wall Street Journal,CNN and NBC,a detailed analysis on the stylistic features and effects of the news story comments has been conducted for the purpose of discovering possible links between a poster’s linguistic behav ior and his thought process.The result shows that interrogative,noun phrase and verb phrase are commonly used in news story comments by virtue of their slightly ostentatious nature.Rhetorical devices such as metaphor,simile and parataxis are frequently employed among comments.And the relationship between a poster’s educational background and his postings is also touched up on at the end of this study.
