In this paper, we use Port-Hamiltonian framework to stabilize the Lagrange <span style="font-family:Verdana;">points in the Sun-Earth three-dimensional Circular Restricted Three-Body Problem (CRTBP). T...In this paper, we use Port-Hamiltonian framework to stabilize the Lagrange <span style="font-family:Verdana;">points in the Sun-Earth three-dimensional Circular Restricted Three-Body Problem (CRTBP). Through rewriting the CRTBP into Port-Hamiltonian framework, we are allowed to design the feedback controller through ener</span><span style="font-family:Verdana;">gy-shaping and dissipation injection. The closed-loop Hamiltonian is </span><span style="font-family:Verdana;">a candidate of the Lyapunov function to establish nonlinear stability of the designed equilibrium, which enlarges the application region of feedback controller compared with that based on linearized dynamics. Results show that th</span><span style="font-family:Verdana;">e Port-Hamiltonian</span><span style="font-family:Verdana;"> a</span><span style="font-family:Verdana;">pproach allows us to successfully stabilize the Lagrange points, where the Linear Quadratic Regulator (LQR) may fail. The feedback </span><span style="font-family:Verdana;">system based on Port-Hamiltonian approach is also robust against whit</span><span style="font-family:Verdana;">e noise in the inputs.</span>展开更多
The problem of designing a feedback controller to achieve asymptotic disturbance rejection / attenuation while maintaining good transient response in the RTAC system is known as a benchmark nonlinear control problem, ...The problem of designing a feedback controller to achieve asymptotic disturbance rejection / attenuation while maintaining good transient response in the RTAC system is known as a benchmark nonlinear control problem, which has been an intensive research subject since 1995. In this paper, we will further investigate the solvability of the robust disturbance rejection problem of the RTAC system by the measurement output feedback control based on the robust output regulation method. We have obtained a design by overcoming two major obstacles: find a closed-form solution of the regulator equations; and devise a nonlinear internal model to account for non-polynomial nonlinearities.展开更多
An authoritative parenting style has been shown to promote children’s emotion regulation in European-American family studies.However,little is known about how sleep problems and the child’s sibling status in Chinese...An authoritative parenting style has been shown to promote children’s emotion regulation in European-American family studies.However,little is known about how sleep problems and the child’s sibling status in Chinese families affect this relationship.Based on family system theory,this study attempts to better understand the relationship between authoritative parenting style and emotion regulation.Mothers of preschool children in Chinese kindergartens completed questionnaires about their children’s sleep habits,their authoritative parenting styles,and children’s emotion regulation.A total of 531 children participated in this study.Results showed that authoritative parenting was positively associated with emotional regulation.Sleep problems mediated the effects of authoritative parenting style on emotion regulation.The child’s sibling status moderated the mediating effects of sleep problems in authoritative parenting and emotion regulation relationships.Specifically,the relationship between the authoritative parenting style and sleep problems was significant for only children,while birth order had no significant influence on the authoritative parenting style and sleep problems in two-child families.These findings suggest that a lowauthoritative parenting style predicts low emotion regulation through sleep problems,and this depends on the child’s sibling status,indicating that children without siblings may impair emotion regulation due to increased sleep problems.展开更多
In recent years, rural tourism in China vigorously developed, which promoted economic and social development in rural area. However, serious environmental problems appeared in the development process of rural tourism ...In recent years, rural tourism in China vigorously developed, which promoted economic and social development in rural area. However, serious environmental problems appeared in the development process of rural tourism since rural tourism lacked effective and comprehensive super- vision. These environmental problems included environmental pollution and ecological damage. However, environmental legal system about rural tourism had many problems, such as the lagged legislation, the absence of law enforcement supervision, imperfect judicial system and weak law- abiding awareness. Therefore, it became the solution to solve environmental problems brought by rural tourism in China, and was also the safe- guard for promoting sustainable development of rural tourism in China to establish a sound legal system for rural tourism, implement strict law en- forcement supervision of rural tourism, build litigation system of environmental public interest and enhance law-abiding awareness of rural tourism. For legal defects of regulating rural tourism and its induced environmental problems in China, we tried to perfect regulation of environmental law for rural tourism in China.展开更多
At the present stage,with the continuous development of social economy and science and technology,China's financial and securities industry has gradually developed.As an important part of China's socialist eco...At the present stage,with the continuous development of social economy and science and technology,China's financial and securities industry has gradually developed.As an important part of China's socialist economic market,including the financial and securities industry,therefore,to a certain extent,the development of the financial securities industry has promoted the prosperity and development of China's economy.In other words,strengthening the management of financial securities market regulation can promote the sustainable development of the securities industry,thereby promoting the rapid development of China's economy.This paper mainly discusses and expounds some problems existing in the current process of financial securities market regulation,and proposes solutions to it,hoping to be helpful to the financial securities industry.展开更多
文摘In this paper, we use Port-Hamiltonian framework to stabilize the Lagrange <span style="font-family:Verdana;">points in the Sun-Earth three-dimensional Circular Restricted Three-Body Problem (CRTBP). Through rewriting the CRTBP into Port-Hamiltonian framework, we are allowed to design the feedback controller through ener</span><span style="font-family:Verdana;">gy-shaping and dissipation injection. The closed-loop Hamiltonian is </span><span style="font-family:Verdana;">a candidate of the Lyapunov function to establish nonlinear stability of the designed equilibrium, which enlarges the application region of feedback controller compared with that based on linearized dynamics. Results show that th</span><span style="font-family:Verdana;">e Port-Hamiltonian</span><span style="font-family:Verdana;"> a</span><span style="font-family:Verdana;">pproach allows us to successfully stabilize the Lagrange points, where the Linear Quadratic Regulator (LQR) may fail. The feedback </span><span style="font-family:Verdana;">system based on Port-Hamiltonian approach is also robust against whit</span><span style="font-family:Verdana;">e noise in the inputs.</span>
基金This work was supported by the Hong Kong Research Grants Council(No.CUHK4316/02E)the National Natural Science Foundations of China(No.60374038)
文摘The problem of designing a feedback controller to achieve asymptotic disturbance rejection / attenuation while maintaining good transient response in the RTAC system is known as a benchmark nonlinear control problem, which has been an intensive research subject since 1995. In this paper, we will further investigate the solvability of the robust disturbance rejection problem of the RTAC system by the measurement output feedback control based on the robust output regulation method. We have obtained a design by overcoming two major obstacles: find a closed-form solution of the regulator equations; and devise a nonlinear internal model to account for non-polynomial nonlinearities.
基金supported by the Guangdong Province Philosophy and Social Science Project(Grant No.GD22CJY12)the Young Innovation Talent Project of Guangdong Province(Grant No.2022WTSCX112)the Key Construction Discipline of Guangdong Province(Grant No.2022ZDJS061)to Yan Jin.
文摘An authoritative parenting style has been shown to promote children’s emotion regulation in European-American family studies.However,little is known about how sleep problems and the child’s sibling status in Chinese families affect this relationship.Based on family system theory,this study attempts to better understand the relationship between authoritative parenting style and emotion regulation.Mothers of preschool children in Chinese kindergartens completed questionnaires about their children’s sleep habits,their authoritative parenting styles,and children’s emotion regulation.A total of 531 children participated in this study.Results showed that authoritative parenting was positively associated with emotional regulation.Sleep problems mediated the effects of authoritative parenting style on emotion regulation.The child’s sibling status moderated the mediating effects of sleep problems in authoritative parenting and emotion regulation relationships.Specifically,the relationship between the authoritative parenting style and sleep problems was significant for only children,while birth order had no significant influence on the authoritative parenting style and sleep problems in two-child families.These findings suggest that a lowauthoritative parenting style predicts low emotion regulation through sleep problems,and this depends on the child’s sibling status,indicating that children without siblings may impair emotion regulation due to increased sleep problems.
文摘In recent years, rural tourism in China vigorously developed, which promoted economic and social development in rural area. However, serious environmental problems appeared in the development process of rural tourism since rural tourism lacked effective and comprehensive super- vision. These environmental problems included environmental pollution and ecological damage. However, environmental legal system about rural tourism had many problems, such as the lagged legislation, the absence of law enforcement supervision, imperfect judicial system and weak law- abiding awareness. Therefore, it became the solution to solve environmental problems brought by rural tourism in China, and was also the safe- guard for promoting sustainable development of rural tourism in China to establish a sound legal system for rural tourism, implement strict law en- forcement supervision of rural tourism, build litigation system of environmental public interest and enhance law-abiding awareness of rural tourism. For legal defects of regulating rural tourism and its induced environmental problems in China, we tried to perfect regulation of environmental law for rural tourism in China.
文摘At the present stage,with the continuous development of social economy and science and technology,China's financial and securities industry has gradually developed.As an important part of China's socialist economic market,including the financial and securities industry,therefore,to a certain extent,the development of the financial securities industry has promoted the prosperity and development of China's economy.In other words,strengthening the management of financial securities market regulation can promote the sustainable development of the securities industry,thereby promoting the rapid development of China's economy.This paper mainly discusses and expounds some problems existing in the current process of financial securities market regulation,and proposes solutions to it,hoping to be helpful to the financial securities industry.
