Apart from serving the functions of enlightenment and entertainment, the theatre is also useful in several other ways. For instance, it is a source of employment, cultural preservation, presentation, and projection. I...Apart from serving the functions of enlightenment and entertainment, the theatre is also useful in several other ways. For instance, it is a source of employment, cultural preservation, presentation, and projection. It also serves therapeutic functions and as social control mechanism in a society. It is a mirror of life, reflecting and highlighting the moral codes and the ills of society and castigating social evil and its doers. Beyond all of these, the theatre could also serve as an agent of civilization, community mobilisation, and youth development and emancipation. This paper discusses how the potentials of the youth in a country such as Nigeria, could be harnessed and deployed for the purposes of national orientation, development, and integration, using culture, drama, and theatre as the defining tools for this evolvement.展开更多
Vehicle height and leveling control of electronically controlled air suspension(ECAS) still poses theoretical challenges for researchers that have not been adequately addressed in prior research. This paper investigat...Vehicle height and leveling control of electronically controlled air suspension(ECAS) still poses theoretical challenges for researchers that have not been adequately addressed in prior research. This paper investigates the design and verification of a new controller to adjust the vehicle height and to regulate the roll and pitch angles of the vehicle body(leveling control) during the height adjustment procedures. A nonlinear mechanism model of the vehicle height adjustment system is formulated to describe the dynamic behaviors of the system. By using mixed logical dynamical(MLD) approach, a novel control strategy is proposed to adjust the vehicle height by controlling the on-off statuses of the solenoid valves directly. On this basis, a correction algorithm is also designed to regulate the durations of the on-off statuses of the solenoid valves based on pulse width modulated(PWM) technology, thus the effective leveling control of the vehicle body can be guaranteed. Finally, simulations and vehicle tests results are presented to demonstrate the effectiveness and applicability of the proposed control methodology.展开更多
文摘Apart from serving the functions of enlightenment and entertainment, the theatre is also useful in several other ways. For instance, it is a source of employment, cultural preservation, presentation, and projection. It also serves therapeutic functions and as social control mechanism in a society. It is a mirror of life, reflecting and highlighting the moral codes and the ills of society and castigating social evil and its doers. Beyond all of these, the theatre could also serve as an agent of civilization, community mobilisation, and youth development and emancipation. This paper discusses how the potentials of the youth in a country such as Nigeria, could be harnessed and deployed for the purposes of national orientation, development, and integration, using culture, drama, and theatre as the defining tools for this evolvement.
基金supported by the National Natural Science Foundation of China(Grant Nos.51375212,61403172&51305167)Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD)Key Research and Development Program of Jiangsu Province(Grant No.BE2016149)
文摘Vehicle height and leveling control of electronically controlled air suspension(ECAS) still poses theoretical challenges for researchers that have not been adequately addressed in prior research. This paper investigates the design and verification of a new controller to adjust the vehicle height and to regulate the roll and pitch angles of the vehicle body(leveling control) during the height adjustment procedures. A nonlinear mechanism model of the vehicle height adjustment system is formulated to describe the dynamic behaviors of the system. By using mixed logical dynamical(MLD) approach, a novel control strategy is proposed to adjust the vehicle height by controlling the on-off statuses of the solenoid valves directly. On this basis, a correction algorithm is also designed to regulate the durations of the on-off statuses of the solenoid valves based on pulse width modulated(PWM) technology, thus the effective leveling control of the vehicle body can be guaranteed. Finally, simulations and vehicle tests results are presented to demonstrate the effectiveness and applicability of the proposed control methodology.
