恩智浦扩大汽车视频产品线

恩智浦半导体公司日前推出了第一款符合汽车电子设备委员会（Automotive Electronics Council，AES）标准Q100的视频解码器——SAF7115，这款视频采集设备适用于高性能的车载信息通信系统平台，包括车载视频接收、车载娱乐以及车载导航。     

徐州铁路枢纽通信调度楼屋顶铁塔等效刚度代换

本文通过对徐州铁路枢纽通信调度楼屋顶铁塔等效刚度代换过程的分析，为铁塔的等效刚度代换提供了较合理的计算方法。     

基于CC139卡的WorldFIP总线上层软件开发与应用

介绍了WorldFIP总线的网络特性和构成，给出了基于NT平台的WorldFIP CC139卡的硬件结构和系统的拓扑结构。分析了基于VC＋＋6．0平台下该卡的通信系统软件流程。该软件研制成功对于实现WorldFIP网络在机车行业的国产化应用具有重要的意义。     

Inmarsat:真正的"全球通"

Inmarsat的最新技术将彻底打破船岸信息化推进的瓶颈．远洋船舶不再是信息孤岛，海上通信将实现与陆地无缝接轨。     

TMS320C32 DSP异步串行通信软硬件设计

采用异步通信芯片ST16C550，实现了PC机与基于TMS320C32 DSP的实时信息处理系统之间的高速串行通信，从而大大增强了DSP系统的通信接口控制能力。介绍了ST16C550的性能及与TMS320C32 DSP通信有关的寄存器，并给出了ST16C550在TMS320C32与PC机通信系统中的硬件应用电路及相应的软件编程。     

高速列车通信网络技术特点及其应用

现代列车朝高速化、自动化、舒适化方向发展已经成为必然趋势.列车通信网络已成为高速列车控制系统的关键技术.它能够通过对列车运行及车载设备动作的相关信息进行集中管理,从而保障列车安全高速运行.介绍了列车通信网络的两条总线,即纹线式列车总线(WTB)和多功能车辆总线(MVB),并分析了两层网络拓扑结构.根据现场总线技术在我国高速列车上的应用情况,比较了WTB、MVB、LonWorks、CAN等几种总线的特点,根据其特点可选取不同的应用领域.     

A bintree energy approach for colour image segmentation using adaptive channel selection

A new hierarchical approach called bintree energy segmentation was presented for color image segmentation. The image features are extracted by adaptive clustering on multi-channel data at each level and used as the criteria to dynamically select the best chromatic channel, where the segmentation is carried out. In this approach, an extended direct energy computation method based on the Chan-Vese model was proposed to segment the selected channel, and the segmentation outputs are then fused with other channels into new images, from which a new channel with better features is selected for the second round segmentation. This procedure is repeated until the preset condition is met. Finally, a binary segmentation tree is formed, in which each leaf represents a class of objects with a distinctive color. To facilitate the data organization, image background is employed in segmentation and channels fusion. The bintree energy segmentation exploits color information involved in all channels data and tries to optimize the global segmentation result by choosing the ＂best＂ channel for segmentation at each level. The experiments show that the method is effective in speed, accuracy and flexibility.     

A new channel allocation scheme for hierarchical wireless networks

A channel allocation scheme for hierarchical wireless networks was proposed in terms of the connection-level quality of service. The channel allocation scheme was analyzed using both horizontal channel borrowing and vertical traffic overflowing. Pre-emptive priority strategies are used to classify real-time services and non-real-time services, real-time service is given higher priority for it is allowed to pre-empt channels used by non-real-time service. Some channel borrowing thresholds and acceptance ratios are used to avoid channel locking or dynamic power control, which can also be dynamically adjusted according to network load. Simula-tion results show that the proposed schemes can improve the system performance.