基于Matlab的构音异常声道动态仿真

为对构音异常声道实行辅助治疗,使用Matlab对声道进行动态仿真.采用极点形式在牛顿插值的基础上进行迭代计算出共振峰,对声道进行非线性分段,使用Matlab实现分段后声道形状显示;使用参数Corana改进算法,优化9个声道参数.在进行大量迭代计算获得合适的声道参数后,显示优化后的声道形状.该形状可以为构音治疗师的治疗提供参考.使用声门激励模型产生用于激励的声音,能够合成用于反馈的声音.实验证明该声道仿真模型可以为治疗提供参考.     

Traffic Dynamics and Mode Choice’s Delay Effect Under Traffic Restriction in Two-Mode Networks

Day-to-day traffic assignment models provide a powerful tool to analyze the time evolution of traffic flow within transport networks. In day-to-day dynamics, most models assume that there are only private cars on traffic networks and travelers update their choices each day. However, there are mainly two traffic modes, i.e. cars and buses, and travelers may not change their mode choices frequently. In this paper, a period-to-period traffic assignment model is proposed to capture traffic dynamics under traffic restrictions by considering interactions among different modes and introducing a delay about travelers’ mode choice. The existence and uniqueness of the equilibrium are analyzed. The linear stability of the equilibrium is analyzed and the eigenvalue range of Jacobian matrix is estimated by using the Gershgorin circle theorem. Both theoretical analyses and numerical simulations indicated that compared to the system with no mode choice, mode choice behaviors could improve the stability of the equilibrium. Additionally, mode choice behaviors with delay might further increase the stability domain and dampen oscillations on the cost and the flows. This study explains the evolution patterns of transportation networks under traffic policy and provides guidance for network design and management.

     

过程式语言部分求值循环展开的有效处理方法

文中基于数据流分析技术,通过引进循环中变量之间的相互依赖关系,提出一种过程式语言部分求值的处理方法。利用该方法能有效地解决过程式语言部分求值中循环展开这一难题。     

UG/KF和UG/Mold Wizard在非球面镜片上的应用

知识工程与CAD技术的结合已成为先进制造与自动化技术研究的热点。本文介绍了知识驱动在UG上的两个重要应用UG／KF和UG／Mold Wizard。UG／KF是介于CAD技术和知识工程KBE技术之间新出现的边缘技术,它能够消除传统知识系统与数字化开发设计、制造系统之间的障碍,获取知识并把其中有价值的部分以知识驱动的方式转变成专家知识。UG／Mold Wizard为模具的设计提供向导。在本文中,用UG／KF开发了非球面镜片,并用UG／Mold Wizard为非球面镜片设计了模具。