A 20 degree of the freedom model of the micro-suspended monorail is established to analyze a new type of the vehicle system named micro-suspended monorail.The formula of the tire is established by using the magic form...A 20 degree of the freedom model of the micro-suspended monorail is established to analyze a new type of the vehicle system named micro-suspended monorail.The formula of the tire is established by using the magic formula.Through the modal analysis of the vehicle,the modes of the vehicle are obtained,and resonance has little effect on the vehicle.When the vehicle moves in a right turn curve,it yaws in the clockwise direction.Under the action of the guidewheel(stable wheel)force,the front bogie yaws clockwise but the rear one yaws counterclockwise.Moreover,the two bogies and the car body roll during the curve passing process of the vehicle.When the vehicle speed is high enough,the left drive wheel will derail and the anti-overturning moments are provided by the stable wheels.Then,the car body yaws in the counterclockwise direction when it moves out of the curve.In the simulation of the vehicle passing the curve,the clearance between the guide wheel and rail surface will lead to a fatal impact on the bogie.At the same time,the dynamic response of the vehicle under the crosswind is tested.The vehicle will not overturn due to the crosswind.Finally,the collision of adjacent vehicles is analyzed.The results show that there is an intermittent collision force between two vehicles due to the vehicle's non synchronous pitch motion.展开更多
The Twilight series by Stephanie Meyer, including Twilight, New Moon, Eclipse, and Breaking Dawn, has won multiple awards and is the most popular among young adults. The series is both an unbelievable romance of a 17-...The Twilight series by Stephanie Meyer, including Twilight, New Moon, Eclipse, and Breaking Dawn, has won multiple awards and is the most popular among young adults. The series is both an unbelievable romance of a 17-year-old girl and a 104-year-old vampire and an exquisite fantasy of the supernatural and impossible. Typical fantasy elements exploited in the series, including the existence of supernatural creatures, fulfillment of human desires, depiction of the Secondary World, and imagination of a Utopian society, play a significant role in achieving its magic appeal to the readers worldwide. Thus, the present paper attempts to explore how such irresistible attraction is made possible by employing these fantasy elements.展开更多
We investigated the higher structure of konjac glucomannan (KGM) in the amorphous state and solution using a laser particle size analyzer and a water activity meter. The results show that the thermodynamic structures ...We investigated the higher structure of konjac glucomannan (KGM) in the amorphous state and solution using a laser particle size analyzer and a water activity meter. The results show that the thermodynamic structures of native KGM were primarily composed of the lamella structure units, which involve both granular crystalline and amorphous regions, and that the connection zones of such units contained both loose and tight aggregation regions. The value of surface tension (σ) of native KGM, resting with the density of its hydroxyl groups' self-association, was an important parameter to analyze the higher structures of native KGM in the thermodynamic swelling model of native KGM.展开更多
基金The National Key Research and Development Program of China(No.2018YFB1201702)the Program of State Key Laboratory of Traction Power(No.2018TPL_T11)the Fundamental Research Funds for the Central Universities(No.2682017CX009).
文摘A 20 degree of the freedom model of the micro-suspended monorail is established to analyze a new type of the vehicle system named micro-suspended monorail.The formula of the tire is established by using the magic formula.Through the modal analysis of the vehicle,the modes of the vehicle are obtained,and resonance has little effect on the vehicle.When the vehicle moves in a right turn curve,it yaws in the clockwise direction.Under the action of the guidewheel(stable wheel)force,the front bogie yaws clockwise but the rear one yaws counterclockwise.Moreover,the two bogies and the car body roll during the curve passing process of the vehicle.When the vehicle speed is high enough,the left drive wheel will derail and the anti-overturning moments are provided by the stable wheels.Then,the car body yaws in the counterclockwise direction when it moves out of the curve.In the simulation of the vehicle passing the curve,the clearance between the guide wheel and rail surface will lead to a fatal impact on the bogie.At the same time,the dynamic response of the vehicle under the crosswind is tested.The vehicle will not overturn due to the crosswind.Finally,the collision of adjacent vehicles is analyzed.The results show that there is an intermittent collision force between two vehicles due to the vehicle's non synchronous pitch motion.
文摘The Twilight series by Stephanie Meyer, including Twilight, New Moon, Eclipse, and Breaking Dawn, has won multiple awards and is the most popular among young adults. The series is both an unbelievable romance of a 17-year-old girl and a 104-year-old vampire and an exquisite fantasy of the supernatural and impossible. Typical fantasy elements exploited in the series, including the existence of supernatural creatures, fulfillment of human desires, depiction of the Secondary World, and imagination of a Utopian society, play a significant role in achieving its magic appeal to the readers worldwide. Thus, the present paper attempts to explore how such irresistible attraction is made possible by employing these fantasy elements.
文摘We investigated the higher structure of konjac glucomannan (KGM) in the amorphous state and solution using a laser particle size analyzer and a water activity meter. The results show that the thermodynamic structures of native KGM were primarily composed of the lamella structure units, which involve both granular crystalline and amorphous regions, and that the connection zones of such units contained both loose and tight aggregation regions. The value of surface tension (σ) of native KGM, resting with the density of its hydroxyl groups' self-association, was an important parameter to analyze the higher structures of native KGM in the thermodynamic swelling model of native KGM.
