介绍了一个基于ASP.NET网上答疑系统的结构组成和基本功能,并给出了基于ASP.NET技术实现网上答疑系统的方法。该系统采用了SQL Server 2000作为后台数据库服务器,用ASP.NET编写Web服务器有关程序,用ASP.NET组件ADO.NET访问数据库,客户...介绍了一个基于ASP.NET网上答疑系统的结构组成和基本功能,并给出了基于ASP.NET技术实现网上答疑系统的方法。该系统采用了SQL Server 2000作为后台数据库服务器,用ASP.NET编写Web服务器有关程序,用ASP.NET组件ADO.NET访问数据库,客户端用网页浏览器即可访问本系统。系统为用户提供了实时答疑和非实时答疑两种答疑方式。整个系统较好地利用了网络资源,实现了教育资源与教育方法的共享。展开更多
The core task of tracking control is to make the controlled plant track a desired trajectory.The traditional performance index used in previous studies cannot eliminate completely the tracking error as the number of t...The core task of tracking control is to make the controlled plant track a desired trajectory.The traditional performance index used in previous studies cannot eliminate completely the tracking error as the number of time steps increases.In this paper,a new cost function is introduced to develop the value-iteration-based adaptive critic framework to solve the tracking control problem.Unlike the regulator problem,the iterative value function of tracking control problem cannot be regarded as a Lyapunov function.A novel stability analysis method is developed to guarantee that the tracking error converges to zero.The discounted iterative scheme under the new cost function for the special case of linear systems is elaborated.Finally,the tracking performance of the present scheme is demonstrated by numerical results and compared with those of the traditional approaches.展开更多
文摘介绍了一个基于ASP.NET网上答疑系统的结构组成和基本功能,并给出了基于ASP.NET技术实现网上答疑系统的方法。该系统采用了SQL Server 2000作为后台数据库服务器,用ASP.NET编写Web服务器有关程序,用ASP.NET组件ADO.NET访问数据库,客户端用网页浏览器即可访问本系统。系统为用户提供了实时答疑和非实时答疑两种答疑方式。整个系统较好地利用了网络资源,实现了教育资源与教育方法的共享。
基金This work was supported in part by Beijing Natural Science Foundation(JQ19013)the National Key Research and Development Program of China(2021ZD0112302)the National Natural Science Foundation of China(61773373).
文摘The core task of tracking control is to make the controlled plant track a desired trajectory.The traditional performance index used in previous studies cannot eliminate completely the tracking error as the number of time steps increases.In this paper,a new cost function is introduced to develop the value-iteration-based adaptive critic framework to solve the tracking control problem.Unlike the regulator problem,the iterative value function of tracking control problem cannot be regarded as a Lyapunov function.A novel stability analysis method is developed to guarantee that the tracking error converges to zero.The discounted iterative scheme under the new cost function for the special case of linear systems is elaborated.Finally,the tracking performance of the present scheme is demonstrated by numerical results and compared with those of the traditional approaches.
