Current sciences fail in understanding the future trends of human beings＇ behaviors and cultures. From the hunting tribes to the agricultural society, the civilized country, and then to the industrial society, none o...Current sciences fail in understanding the future trends of human beings＇ behaviors and cultures. From the hunting tribes to the agricultural society, the civilized country, and then to the industrial society, none of these developments is the results of human beings＇ reasonable proposal. The human beings are ＂developed＂, i.e. pushed forward by certain invisible forces. As being cultural, they are dominated by their cultural concepts. To explore the source of every civilization＇s concepts, the formation history of its mythological concepts during the pre-historic period or at the beginning of its civilization shall be studied first. By interpreting the first literature works at the beginning of western civilization, the temporary mythologists reveal the rule that mythological concepts dominate the ritual behaviors and narrative expressions. This paper interprets the historical narratives in Records of the Grand Historian.＂ Annals of the First Emperor of Qin, to reproduce the concepts that dominate China＇s national rulers, present the theory of Mythological Concepts＇ Determinism, and correspond to the counter-force of ideology put forward by Friedrich Engels in his later years and the religious concepts＇ determinism by Max Weber, so as to illustrate the mythological concepts＇ function as the prototype code of ideology, and refer to a common and effective directory approach of social science studies.展开更多
A decentralized PID neural network(PIDNN) control scheme was proposed to a quadrotor helicopter subjected to wind disturbance. First, the dynamic model that considered the effect of wind disturbance was established vi...A decentralized PID neural network(PIDNN) control scheme was proposed to a quadrotor helicopter subjected to wind disturbance. First, the dynamic model that considered the effect of wind disturbance was established via Newton-Euler formalism.For quadrotor helicopter flying at low altitude in actual situation, it was more susceptible to be influenced by the turbulent wind field.Therefore, the turbulent wind field was generated according to Dryden model and taken into consideration as the disturbance source of quadrotor helicopter. Then, a nested loop control approach was proposed for the stabilization and navigation problems of the quadrotor subjected to wind disturbance. A decentralized PIDNN controller was designed for the inner loop to stabilize the attitude angle. A conventional PID controller was used for the outer loop in order to generate the reference path to inner loop. Moreover, the connective weights of the PIDNN were trained on-line by error back-propagation method. Furthermore, the initial connective weights were identified according to the principle of PID control theory and the appropriate learning rate was selected by discrete Lyapunov theory in order to ensure the stability. Finally, the simulation results demonstrate that the controller can effectively resist external wind disturbances, and presents good stability, maneuverability and robustness.展开更多
This paper investigates the mixed Ho~ and passive projective synchronization problem for fractional-order （FO） memristor-based neural networks. Our aim is to design a controller such that, though the unavoidable phe...This paper investigates the mixed Ho~ and passive projective synchronization problem for fractional-order （FO） memristor-based neural networks. Our aim is to design a controller such that, though the unavoidable phenomena of time-delay and parameter uncertainty are fully considered, the resulting closed-loop system is asymptotically stable with a mixed H∞ and passive performance level. By combining active and adaptive control methods, a novel hybrid control strategy is designed, which can guarantee the robust stability of the closed-loop system and also ensure a mixed H∞ and passive performance level. Via the application of FO Lyapunov stability theory, the projective synchronization conditions are addressed in terms of linear matrix inequaiity techniques. Finally, two simulation examples are given to illustrate the effectiveness of the proposed method.展开更多
文摘Current sciences fail in understanding the future trends of human beings＇ behaviors and cultures. From the hunting tribes to the agricultural society, the civilized country, and then to the industrial society, none of these developments is the results of human beings＇ reasonable proposal. The human beings are ＂developed＂, i.e. pushed forward by certain invisible forces. As being cultural, they are dominated by their cultural concepts. To explore the source of every civilization＇s concepts, the formation history of its mythological concepts during the pre-historic period or at the beginning of its civilization shall be studied first. By interpreting the first literature works at the beginning of western civilization, the temporary mythologists reveal the rule that mythological concepts dominate the ritual behaviors and narrative expressions. This paper interprets the historical narratives in Records of the Grand Historian.＂ Annals of the First Emperor of Qin, to reproduce the concepts that dominate China＇s national rulers, present the theory of Mythological Concepts＇ Determinism, and correspond to the counter-force of ideology put forward by Friedrich Engels in his later years and the religious concepts＇ determinism by Max Weber, so as to illustrate the mythological concepts＇ function as the prototype code of ideology, and refer to a common and effective directory approach of social science studies.
基金Project(2011ZA51001)supported by National Aerospace Science Foundation of China
文摘A decentralized PID neural network(PIDNN) control scheme was proposed to a quadrotor helicopter subjected to wind disturbance. First, the dynamic model that considered the effect of wind disturbance was established via Newton-Euler formalism.For quadrotor helicopter flying at low altitude in actual situation, it was more susceptible to be influenced by the turbulent wind field.Therefore, the turbulent wind field was generated according to Dryden model and taken into consideration as the disturbance source of quadrotor helicopter. Then, a nested loop control approach was proposed for the stabilization and navigation problems of the quadrotor subjected to wind disturbance. A decentralized PIDNN controller was designed for the inner loop to stabilize the attitude angle. A conventional PID controller was used for the outer loop in order to generate the reference path to inner loop. Moreover, the connective weights of the PIDNN were trained on-line by error back-propagation method. Furthermore, the initial connective weights were identified according to the principle of PID control theory and the appropriate learning rate was selected by discrete Lyapunov theory in order to ensure the stability. Finally, the simulation results demonstrate that the controller can effectively resist external wind disturbances, and presents good stability, maneuverability and robustness.
基金Supported by National Natural Science Foundation of China under Grant Nos.U1604146,U1404610,61473115,61203047Science and Technology Research Project in Henan Province under Grant Nos.152102210273,162102410024Foundation for the University Technological Innovative Talents of Henan Province under Grant No.18HASTIT019
文摘This paper investigates the mixed Ho~ and passive projective synchronization problem for fractional-order （FO） memristor-based neural networks. Our aim is to design a controller such that, though the unavoidable phenomena of time-delay and parameter uncertainty are fully considered, the resulting closed-loop system is asymptotically stable with a mixed H∞ and passive performance level. By combining active and adaptive control methods, a novel hybrid control strategy is designed, which can guarantee the robust stability of the closed-loop system and also ensure a mixed H∞ and passive performance level. Via the application of FO Lyapunov stability theory, the projective synchronization conditions are addressed in terms of linear matrix inequaiity techniques. Finally, two simulation examples are given to illustrate the effectiveness of the proposed method.
