GPRS/GSM 生物质锅炉监控系统

为解决锅炉有线监控成本高、布线不方便、可靠性差等问题,对GPRS/GSM生物质锅炉监控系统进行研究。系统现场通过采集终端采用modbus通信协议采集锅炉控制中的详细信息,将分布在不同地方锅炉的运行情况和故障信息通过GPRS/GSM网络及时传输到监控中心或者用户手机,用户通过手机短信或者监控中心的上位机软件可以对锅炉进行远程监控。结果表明:该方法具备遥测、遥控和通信功能,能克服GPRS网络自身的一些弊端,保证系统高效、实时、可靠运行。     

Study on Unequal Error Protection for Distributed Speech Recognition System

At present ,the trend to ever-increasing use ofdata communication is spreading to the mobile wire-less world. The small portable devices will be used toaccess these data and cry out for i mproved user inter-faces using speechinput , whichis very i mportan…     

天然气阀门井基于GSM短消息远程监测系统

提出一种基于GSM短消息的远程监测系统,应用于没有供电及有线通信条件下的天然气长输管道野外阀门井内管道压力和燃气泄漏情况的远程监测。在确定系统总体设计的基础上,设计了以GSM模块、单片机为核心的硬件系统和以数据采集、发送及处理为主的软件系统,充分考虑了野外供电和现场电气防爆问题。     

基于Zigbee-GSM技术的矿用锂电池管理系统研究

为了解决有线数据传输技术带来的灵活性和扩展性差、安装和维护不方便等问题,提出了一种基于Zigbee-GSM技术的矿用锂电池组智能管理系统。重点介绍了系统的原理及软硬件设计方案。实践结果表明,该技术方案充分发挥了两种无线通信技术的优点,具有高可靠、低成本、灵活方便等优点,能够有效地保障锂电池组的安全、稳定运行。     

GSM信号在井下巷道传输中的衰落研究

为了实现GSM移动通信系统在矿山井下的应用，通过现场模拟测试，对GSM移动信号在巷道传输中的衰落进行了理论研究，建立了900MHz信号在巷道传输中衰落的数学模型，为预测GSM移动信号在井下巷道传输中的衰落程度提供了理论依据。     

Effects of optical radiation on the Mössbauer spectrum of 151Eu3+: CaF2

We study the changes in the shape of the Mössbauer spectrum for the 21.5?keV transition of ¹⁵¹Eu³⁺ nuclei in a CaF₂ lattice, assuming that a population of the excited electronic state ⁵ D ₀ is maintained by optical pumping. For a population of the excited state ⁵ D ₀ of 10%, we determine the magnitude of the changes in the Mössbauer spectrum as 1.9% of the area of the unperturbed spectrum.     

Key success factors for the launch of government social media platform: Identifying the formation mechanism of continuance intention

Social media has flourished recently, and government agencies across different levels are experimenting with launching government social media (GSM) to socialize government services, processes, and data. Both researchers and practitioners are focusing on understanding the key success factors related to the launch of GSM. This study aims to identify the key success factors by exploring the formation mechanism of individuals' continuous usage intention. Through the theoretical lens of the uses and gratifications theory (UGT), we identify the gratification factors (i.e., information seeking, social activity, content consumption, collective intelligence, and network externality) that stimulate users' continuance intention toward GSM. Furthermore, we draw upon the stimulus–organism–response (SOR) framework to develop a model for exploring the effects of gratification factors (as stimulus in the SOR framework) on individuals' online experiential states (i.e., flow experience and sense of belonging) and, subsequently, their continuance intention. The results of our survey of 336 government microblogging residents indicate that usage continuance intention is in part determined by gratification factors. Furthermore, the associations among gratification factors and users’ continuance intention can be mediated by the sense of belonging and flow experience.     

基于AVR单片机的智能养鱼控制系统设计与开发

以Atmega 8单片机为控制中心,利用温度传感器DS18B20、放料控制系统,结合无线射频等技术,设计并实现了智能养鱼控制系统。该系统具有投放饲料、补充氧气、PID温度调节等全过程进行智能化的自动控制和检测。     

GSM传输协议与网络传输协议的比较及应用

主要研究GSM通信协议与网络通信协议的主要内容并运用的一些技术对两者进行比较,并研究两种通信协议在我们生活中的应用。文章通过对两种协议的研究,可以更好地学习这两种通信协议,有助于以后的工作学习和生活。     

基于物联网技术的轿车3G/4G远程监控系统研究

针对车辆传统安全措施的局限性,文章提出了基于Android智能终端的移动监控系统。将网络、GSM短信模块和单片机结合、传感器等技术相结合,利用已有的GSM/SMS服务和低成本的硬件设施搭建一个远程测控系统,将计算机串口与GSM无线MODEM相连,通过短信业务,利用GSM公用网进行远程测控。用手机App和短信模块与单片机相结合进行远程操作。