MCU语音型电子万年历的开发

介绍一种基于AT89C51单片机控制的电子万年历,该系统结合了红外遥控技术和语音录放技术,除具备传统的万年历所具有的时间显示功能之外,该系统还兼有语音报时,遥控设定时间等功能.     

基于单片机的公交车智能语音报站和液晶显示系统设计

本文采用单片机AT89C51作为控制核心,语音芯片ISD2560实现语音的存储和回放,LCD进行汉字显示,设计了公交车智能报站系统,实现了公交车站台语音播报和液晶显示双重功能。     

一种智能录放音系统的设计与实现

介绍一种基于单片机AT89C51及数码语音芯片ISD4004的智能录放音系统的实现方法.通过分析ISD4004的内存管理机制,重点阐述了单片机控制非定长语音分段录音和组合回放技术,并给出了软件设计流程图.     

混沌学:教学设计新思维初探

许多传统的教学设计理论在当前变化迅速、全球交流、高新技术迅猛发展的信息时代环境中已不再适用。用混沌理论作为现代教学系统设计理论基础，已经成为该领域研究的热点之一。本文根据混沌运动的普适性特征，初步探讨了混沌理论与现代教学系统耦合成混沌教学设计的必然性，并着重探讨了这一教学设计创新模式的构建思想。     

Countering user risk in information system development projects

User related issues have long been broadly discussed in the information system development (ISD) project research area. In this study, we focus on user risk and identify two risk countering approaches to demonstrate how to deal with user risk and its negative impact on ISD projects. We hypothesize that (1) user risk has a negative impact on project performance, (2) users’ bond with the project and the development team can help reduce user risk, and (3) developers’ task knowledge and vertical coordination can ease the negative impact of user risk and increase project performance. A quantitative approach with survey data collected from 240 practitioners confirmed our hypotheses. In addition, we interviewed seven developers and three user representatives to complete our understanding of this issue. Implications for academia and practitioners are discussed at the end of this paper. Suggestions for future research directions are also provided.