临时限速辅助决策系统的设计与实现

临时限速是高铁列控系统的核心功能之一,临时限速的漏下、错下都可能带来极大的安全隐患,特别在复杂线路情况下因相关人员不熟悉工务、电务线路信息导致临时限速命令无法正确下达,且限速预演依赖真实运营环境,影响运营效率及安全。针对以上问题,研究基于工务限速参数的临时限速参数自动生成方法,并研究集成化列控设备仿真技术,设计并实现临时限速辅助决策系统。该系统可自动生成电务临时限速参数,并提供独立的仿真预演环境。系统部署试用结果表明该系统可有效辅助相关人员高效、准确地完成临时限速相关操作。     

Modified gray level difference-based thresholding segmentation and its application in X-Ray welding image

Thresholding is a popular image segmentation method that often requires as a preliminary and indispensable stage in the computer aided image process, particularly in the analysis of X-ray welding images. In this paper, a modified gray level difference-based transition region extraction and thresholding algorithm is presented for segmentation of the images that have been corrupted by intensity inhomogeneities or noise. Classical gray level difference algorithm is improved by selective output of the result of the maximum or the minimum of the gray level with the pixels in the surrounding, and multi-structuring of neighborhood window is used to represent the essence of transition region. The proposed algorithm could robustly measure the gray level changes, and accurately extract transition region of an image. Comparisons with other approaches demonstrate the superior performance of the proposed algorithm.