一种基于传呼的PDA信息更新方式

交通信息系统PDA为了使内部信息具有实时性．并为降低服务成本，不使用GPRS或其它更新方式，而是使用传呼接收电路．实时更新铁路、民航交通信息。本文简要介绍了此功能实现所采用的硬件结构、通信协议及处理方式。     

PDA在农电移动办公系统中的应用

在农电管理系统中数据采集过程的中间环节比较多,实物流与数据流相分离。根据掌上电脑(PDA)的特点,结合农电移动办公系统实际需求,对PDA在农电移动办公系统中的应用进行了研究。采用PDA进行移动式数据采集及计算可以减少农电管理过程中的信息流转环节,将计算机管理前推至工作现场,解决先实物后补管理的矛盾;同时,可将PDA功能与供电营业所MIS进行联网,整合农电管理信息系统,以提高农电管理和客户服务水平。     

应用DS2480实现RS-232与单总线的串行接口

在基于单总线技术的智能巡检系统中，应用串行接口芯片DS2480可较好地解决具有RS－232串口的主机与现场1－Wire器件的通信问题。本文较为详细地介绍了DS2480芯片及其在智能巡检系统现场检测模块中的应用。     

Experimental validation of numerical model for turbulent flow in a tangentially fired boiler with platen reheaters

A 1 : 20 laboratory scale test rig of a 200 MW tangentially fired boiler is built up with completely simulated structures such as platen heaters and burners. Iso-thermal turbulent flow in the boiler is mapped by 3-D PDA (Particle Dynamic Analyzer). The 3-D numerical models for the same case are proposed based on the solution ofk-ε model closed RANS (Reynolds time-Averaged Navier-Stokes) equations, which are written in the framework of general coordinates and discretized in the corresponding body-fitted meshes. Not only are the grid lines arranged to fit the inner/outer boundaries, but also to align with the streamlines to the best possibility in order to reduce the NDE (numerical diffusion errors). Extensive comparisons of profiles of mean velocities are carried out between experiment and calculation. Predicted velocities in burner region were quantitatively similar with measured ones, while those in other area have same tendency with experimental counterpart.     

基于IPP的嵌入式音频解码器设计与优化

本文从Intel公司的IPP工具对基于特定处理器的音频编解码优化方案出发,简要介绍IPP的嵌入式移植应用与API编程规范以及优化步骤.完成了在IntelXScalePXA255PDA上,利用Linux下Qte/QtopiaGUI开发环境,通过IPP优化,完成音频解码器的设计与实现。     

PDA在远程检验检疫业务上的实现

随着检验检疫信息化建设的逐步深入,全面数字化检验检疫工作的建设已经成为目前检验检疫信息化建设的主题.而移动办公设备和无线网络技术的出现,为国家检验检疫人员探索开发一套PDA远程检验检疫业务系统提供了可能.本文从系统总体功能流程、各子系统设计、系统开发环境等几方面对该系统进行详细介绍.     

PDA系统及其在卷取机上的应用

针对由高精度传动控制、位置控制、压力控制以及快速连锁控制等组成的卷取控制系统，介绍了开发PDA数据采集系统的组态、网络集成和软件配置等。分析了系统的组态和分析方法的应用。PDA系统的应用，解决了过程数据的高速采集、存贮和分析技术等难题，为分析设备和工艺控制状况提供了技术平台和分析手段，解决了生产过程数据的录入的难题，具有推广应用价值。     

Dynamic mobile RFID-based supply chain control and management system in construction

Construction project control attempts to effectively obtain real-time information and enhance dynamic control and management via information sharing and analysis from involved participants of the projects to reduce construction conflicts and project delay. However, extending the construction project control system to job sites is considered inefficient since construction sites are unconventional practice. Integrating promising information technologies such as radio frequency identification (RFID) technology, mobile devices-PDA and web portals can help improve the effectiveness and convenience of information flow in construction supply chain control systems. Radio frequency identification is appropriate for various construction applications, and provides cost savings through increased speed and accuracy of data entry. This study demonstrates the effectiveness of a RFID-based supply chain management application called the mobile construction RFID-based dynamic supply chain management (M-ConRDSCM) system in construction projects, demonstrating that it responds efficiently and enhances the information flow among offices and sites in a construction supply chain environment. The M-ConRDSCM system is then applied to a selected case study involving a High-Tech factory building in Taiwan to verify the proposed methodology and demonstrate the effectiveness of information sharing of project control in the construction phase. The advantage of the M-ConRDSCM system lies not only in improving work efficiency for on-site engineers, but also in providing dynamic operation control and management to enable project participants to control the whole project. Moreover, this study presents a generic system architecture and its implementation.     

基于PDA电路加密模块的实现

论文介绍了加密模块的基本原理,给出了一种PDA电路加密模块的解决方案,并详细阐述了加密模块的实现过程。     

数据关联算法的研究

在现代目标跟踪系统中,数据关联是一个重要组成部分.由于测量来源的不确定性,密集环境中的目标跟踪比较困难.概率数据关联算法和联合概率数据关联算法能很好地处理目标跟踪并在很多领域得到了广泛的应用.但是一旦出现某种干扰或是故障,通过概率数据关联算法得到的滤波值也会偏离真实值很多,造成滤波发散,严重影响性能.针对这一不足,基于概率数据关联算法中的组合新息,提出了修正概率数据关联算法.最后用一些实例来评价该跟踪算法的跟踪性能,仿真结果表明了修正概率数据关联算法和修正联合概率数据关联算法的有效性.