美国铁路货车车钩发展及技术研究

简述了美国铁路货车车钩的发展历程、种类和规范标准,分析了美国近几年在铁路货车车钩技术方面的研究情况,找出了我国铁路货车车钩研究的差距并提出了建议。     

铁路重载货车车钩裂纹故障探讨

对16型、17型车钩钩体、钩舌在开行2万t重载列车后出现的裂纹增多现象进行了调研，从设计、制造工艺、运用工况变化等方面对故障原因进行了分析，从产品结构、制造工艺等方面提出了改进措施。实际运用证明改进措施成功可行。     

无损检测技术在铁路货车车钩、钩尾框上的应用

介绍了我国铁路货车车钩、钩尾框概况,无损检测技术在我国铁路货车车钩、钩尾框应用历程,以及国内外无损检测技术在车钩、钩尾框的应用情况,并对无损检测技术的应用提出了建议。     

F型车钩及其国产化

简述了F型车钩的概况、结构特点、技术特点及主要性能参数,并介绍了F型车钩在国产化过程中的试验验证情况。     

Cyclostationary property based spectrum sensing algorithms for primary detection in cognitive radio systems

To implement the primary signal without interference in cognitive radio systems, cognitive radios can detect the presence of the primary user in low SNR. Currently, energy detector is the most common way of spectrum sensing because of its low computational complexity. However, performance of the method will be possibly degraded due to the uncertainty noise. This paper illustrates the benefits of one-order and two-order cyclostationary properties of primary user’s signals in time domain. These feature detection techniques in time domain possess the advantages of simple structure and low computational complexity comparing with spectral feature detection methods. Furthermore, performance of the one-order and two-order feature detection is studied and the analytical results are given. Our analysis and numerical results show that the sensing performance of the one-order feature detection is improved significantly comparing with conventional energy detector since it is robust to noise. Meanwhile, numerical results show that the two-order feature detection technique is better than the one-order feature detection. However, this benefit comes at the cost of hardware burdens and power consumption due to the additional multiplying algorithm.     

澳大利亚平车用1 3号鹅颈式车钩

简要介绍了为出口澳大利亚C3型集装箱平车设计制造的13号鹅颈式车钩的基本要求、结构及钩体的静强度有限元分析和该车钩的试验运用情况。     

铁路货车车钩数字化量值传递体系的研究

介绍了我国铁路货车车钩量值传递管理体系的基本情况,分析了现有车钩实物量值传递的局限性,提出了构建以数字化基准钩为溯源源头的车钩量值传递体系的可行性,并给出了车钩数字化量值传递体系总体框架。     

牵引杆技术在大秦铁路重载货车上的应用

增加单车载重,扩大列车编组和提高机车牵引能力都会导致纵向力的增加及纵向冲动的加剧,为此在大秦铁路重载货车上研制开发RFC型牵引杆,来消除车钩间的连挂间隙.介绍了RFC牵引杆的结构与特点,并经过计算分析及试验验证该牵引杆符合技术条件要求.另外还讲述了牵引杆的运用及推广情况及取得的明显经济效益.