面向智能导师系统的Siri个人助理应用研究

随着新一代信息技术产业的迅猛发展,越来越多的智能终端系统推动着教育信息化的变革。Siri是内建于iPhone4S iOS5操作系统上的个人助理软件,主要根据用户自然语音输入完成操作指令,具备自然语言理解、自动化信息处理以及情景对话的特性,其核心价值在于能将人工智能技术成功应用于人类学习、组织及认知等诸多方面。文章在介绍Siri特性与意义的基础上,阐述了其在云环境下智能的工作原理与流程,探究将Siri作为智能导师系统的可行性并构建基于Siri的智能导师系统案例。该案例围绕Siri模拟人类导师的教学指导活动创设了一种智能化学习环境,从理论和实践两个层面全方位解读Siri在学习实践中的技术载体优势与对未来教学所产生的改变和影响。

Optimization of actuator/sensor position of multi-body system with quick startup and brake

A new method was put forward to optimize the position of actuator/sensor of multi-body system with quick startup and brake. Dynamical equation was established for the system with intelligent structure of piezoelectric actuators. According to the property of the modes varying with time, the performance index function was developed based on the optimal configuration principle of energy maximal dissipation, and the relevant optimal model was obtained. According to its characteristic, a float-encoding genetic algorithm, which is efficient, simple and excellent for solving the global-optimal solution of this problem, was adopted. Taking the plane manipulator as an example, the result of numerical calculation shows that, after the actuator/sensor position being optimized, the vibration amplitude of the multi-body system is reduced by 35% compared with that without optimization.