基于STC 12C控制及Android终端的智能存取设备

设计了一种便携式智能存取设备。它包括以STC12C单片机为控制中心的下位机和Android终端。其中Android终端实现数据检索、借物系统、语音识别搜索等;下位机实现规格检测和位置提示。Android终端与下位机之间通过蓝牙进行数据交互。经过测试,该设备使用便捷,查找效率高。     

基于蓝牙的智能终端数据传输系统的应用研究

针对物联网系统中智能终端之间数据传输的要求以及智能设备存在的交流、计算等问题,将蓝牙技术引入数 据传输过程,提出了基于蓝牙技术的智能终端数据传输系统。采用CC2540 芯片实现终端设备之间的蓝牙低功耗传输,并分 析了基于Android 系统的终端蓝牙传输过程,研究了基于蓝牙的智能终端设备与智能手机之间无线数据传输原理,实现了数据 在智能终端设备之间的交互,为提高物联网数据传输能力及速度提供了新思路。     

Android平台i-Jetty服务器在智能家居中的应用研究

针对智能家居系统架构复杂、开发难度较大等问题,提出了一种基于Android平台嵌入式Web服务器i-Jetty的智能家居系统方案。在ARM硬件平台及Android软件平台上,采用i-Jetty服务器实现了家居环境信息网络远程监控功能。系统以Mini6410开发板为中央控制器、服务器和室内监控平台,采用蓝牙与被控设备进行通信,通过Linux层驱动加载、Android本地服务和Web服务的联合编程,实现对传感器数据的获取、家电控制和信息发布。实验结果证明了方案的可行性和实用性。     

基于Android的心电监护软件系统设计与实现

为了降低移动心电监护成本,充分利用智能手机等移动设备资源,提出了一种基于Android平台的心电监护软件系统,结合Android平台的特点,利用Android的通用框架完成软件系统开发.软件系统使用蓝牙、串口等与心电采集模块通信,获取心电数据并在移动设备进行实时分析,利用3G等无线网络技术接入互联网,实现心电数据的远程传输.实验结果表明,该心电监护软件系统可以完成心电实时监护、分析和传输.     

基于Android系统的智能循迹避障小车设计

智能循迹避障小车由控制系统Android设备和小车主体两部分构成.小车通过5路红外对管组成的循迹模块进行路径识别,通过3路超声波模块检测小车周边的障碍物,单片机(MCU)根据采集的环境信息控制小车按照正确的轨迹移动.采用蓝牙模块与上位机Android系统进行通信,采集的小车状态信息通过蓝牙模块上传至Android设备显示,Android设备通过蓝牙模块发送指令到单片机串口控制小车.智能循迹避障小车的研究在无人驾驶方面具有广泛的应用前景.     

基于FPGA的手机控制智能密码锁的设计与实现

本文设计基于FPGA、GSM系统、Android智能手机蓝牙功能的智能电子密码锁。密码锁内置蓝牙模块以及GSM控制模块,具有通过手机软件修改密码、管理员权限设置、遥控开锁等功能,当用户输入密码错误次数超过规定值,系统自动断电并以短消息SMS的形式通过GSM网络给用户发送报警信息。开锁密码使用DES加密算法进行加密保护。经测试,系统使用方便,安全可靠。     

Android平台单主机与多从机自配对蓝牙通信研究

以往关于Android平台蓝牙通信的研究大多是一对一的模式。笔者在一对一蓝牙通信的基础上,更深层次研究了Android平台上单主机与多从机自配对的蓝牙通信,详细阐述了如何实现一台安卓蓝牙手机与多台安卓蓝牙手机的双向数据交换。蓝牙连接过程智能、安全,无需用户手动配对,并在应用内进行了加密连接,以期为需要开发Android一对多蓝牙应用的开发者提供指导和参考。     

电磁阀远程控制及水压监测系统设计

为了实现远程控制电磁阀及监测输水管道水压,提高农业灌溉效率;采用STM32微控制器及Android嵌入式系统,开发出一种对电磁阀进行控制及水压监测系统;微控制器通过串口连接GPRS模块,从而接收命令控制电磁阀和发送水压数据;Android手机客户端实现阀门控制界面和水压数据显示功能;云服务器负责连接GPRS模块和手机客户端,并且管理底层设备与用户信息;该系统已运用在某智能节水灌溉公司的实验大棚基地中,实验结果表明,系统能实时进行远程控制及监测,并能确保输水系统正常运行;该系统能够推动农业现代化的发展,减少人力成本,提高生产效率。     

基于Android平台的保健食品移动监管系统

针对保健食品企业监管效率低以及管理模式的不健全, 提出一种基于Android平台的移动监管系统模式. 智能终端设备通过连接3G、4G等无线网络, 使监管人员在执法现场将采集的信息数据直接上传至服务器, 同时增设数据同步代理机制, 实时监听用户的离线和在线状态, 防止数据丢失, 再利用蓝牙无线通信技术实现监管数据的后台打印功能, 进一步简化执法流程. 本系统的应用实现了移动监管和移动办公的模式, 具有实际应用价值.     

基于Android系统的人脸识别系统

当前随着基于Android系统的移动终端设备的广泛应用,以及图像采集设备的普遍集成,使得Android系统的图像采集设备除了具有照相、摄像功能以外,正在扩展新的实用型功能。其中,利用Android系统中的图像采集设备,开发人脸识别系统,使移动终端设备多了一种加密的方式。从硬件角度无需成本投入,软件方面需要进行基于Android系统的人脸识别系统的开发。该系统可以设置在用户的开机环节,也可设置在关键数据加密的环节,系统自动识别用户脸部头像,以使设备中的信息处于安全状态。文章研究了一种基于Android系统的人脸识别系统的设计与开发。     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

View-based model-driven architecture for enhancing maintainability of data access services

In modern service-oriented architectures, database access is done by a special type of services, the so-called data access services (DAS). Though, particularly in data-intensive applications, using and developing DAS are very common today, the link between the DAS and their implementation, e.g. a layer of data access objects (DAOs) encapsulating the database queries, still is not sufficiently elaborated, yet. As a result, as the number of DAS grows, finding the desired DAS for reuse and/or associated documentation can become an impossible task. In this paper we focus on bridging this gap between the DAS and their implementation by presenting a view-based, model-driven data access architecture (VMDA) managing models of the DAS, DAOs and database queries in a queryable manner. Our models support tailored views of different stakeholders and are scalable with all types of DAS implementations. In this paper we show that our view-based and model driven architecture approach can enhance software development productivity and maintainability by improving DAS documentation. Moreover, our VMDA opens a wide range of applications such as evaluating DAS usage for DAS performance optimization. Furthermore, we provide tool support and illustrate the applicability of our VMDA in a large-scale case study. Finally, we quantitatively prove that our approach performs with acceptable response times.     

A pragmatic multi-method investigation of discrepant technological events: Coping,attributions, and ‘accidental’ learning

Discrepant technological events or situations that entail a problem, a misunderstanding or a difficulty with the Information Technology (IT) being employed, are common in the workplace, and can lead to frustration and avoidance behaviors. Little is known, however, about how individuals cope with these events. This paper examines these events by using a multi-method pragmatic approach informed by coping theory. The results of two studies – a critical incident study and an experiment – serve to build and test, respectively, a theoretical model that posits that individuals use a variety of strategies when dealing with these events: they experience negative emotions, make external attributions, and adopt engagement coping strategies directed at solving the event, eventually switching to a disengagement coping strategy when they feel they have no control over the situation. Furthermore, users’ efforts may result in ‘accidental’ learning as they try to overcome the discrepant IT events through engagement coping. The paper ends with a discussion of the results in light of existing literature, future opportunities for research, and implications for practice.     

The Distributed Time-Triggered Simulation Scheme: Core Principles and Supporting Execution Engine

Distributed real-time simulation is a young technology field but its practice is under increasing demands. In recent years the author and his collaborators have been establishing a new approach called the distributed time-triggered simulation (DTS) scheme which is conceptually simple and easy to use but widely applicable. The concept was initiated in the course of developing a new-generation object-oriented real-time programming scheme called the time-triggered message-triggered object (TMO) programming scheme. Some fundamental issues inherent in distributed real-time simulation that were learned during recent experimental studies are discussed along with some approaches for resolving the issues. An execution engine developed to support both the TMOs engaged in control computation and the TMOs engaged in DTS is also discussed along with its possible extensions that will enable significantly larger-scale DTSs.     

Software-Konfigurationsmanagement in großen Softwareprojekten

Zusammenfassung Mit zunehmender Größe der Softwaresysteme verschärfen sich die für die Software-Herstellung typischen Probleme: Beherrschen großer Objektmengen, Erhalten der Systemkonsistenz, Kontrolle der ständigen Änderungseinflüsse und Gewährleisten einer langen Lebensdauer. Die Disziplin Konfigurationsmanagement bildet den methodischen Ansatz, diese Probleme besser zu beherrschen. Software-Konfigurationsmanagement faßt die Herstellung von Softwaresystemen als eine Abfolge von kontrollierten Änderungen an gesicherten Zwischen- und Endergebnissen auf. Dargestellt werden die Objekte und Funktionen des Software-Konfigurationsmanagements sowie die hierfür in großen Software-Projekten benötigten Methoden, Instanzen und Hilfsmittel.     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and     

Editorial:Brain-machine interface(BMI) and cyborg intelligence

正Brain-machine interfaces(BMIs)aim at building a direct communication pathway between the brain and an external device,and represent an area of research where significant progress has been made during the past decade.Based on BMIs,mind information can be read out by neural signals to control     

Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate     

SCIENCE CHINA Information Sciences SUBJECT INDEX TO VOLUME 57(2014)

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Information for Authors

正http://www.zju.edu.cn/jzus http://www.springerlink.com Aim The Journals of Zhejiang University-SCIENCE(A/B/C)are edited by the international board of distinguished Chinese and foreign scientists,and are aimed to present the latest developments and achievements in scientific research in China and overseas to the world’s scientific circles,especially to stimulate