区域计算机联锁与站间安全信息传输一体化研究

基于DS6-60型二乘二取二计算机联锁系统,提出在同一通信网内实现区域计算机联锁和站间安全信息传输的一体化设计方案,并对设计方案的传输网络结构、网络接口和技术特点等进行分析。     

关于DS6-60产品产业化独立安全评估项目的探讨

实行独立安全评估,系统化的开展安全活动对保证铁路信号设备安全十分重要。针对DS6-60产品二次开发,生产加工、生产工艺、系统验证等各阶段的独立安全评估,确保在此期间不破坏DS6-60系统本身安全完整性等级(SIL)4级的要求。     

铁路信号电源监控系统的研究和应用

介绍了一个适合于铁路信号电源的监控系统.该系统可以实现数据采集、数据处理以及数据通信,还可以对设备故障进行监视、报警和记录故障波形.同时,着重讨论了信号电源监控系统的核心元件SPM60的结构和功能.     

高速铁路60N廓形钢轨适应性研究

针对60N廓形钢轨在高速铁路的适应性问题,对铺设60N廓形钢轨的高速铁路线路开展长期跟踪测试,分析60N廓形钢轨服役性能及养护维修情况;利用仿真手段,采用基于层次分析法的轮轨型面匹配综合评价方法,评价铺设60N廓形钢轨线路的标准及实测轮轨型面匹配状态.结果表明:铺设60N廓形钢轨的高速铁路钢轨服役状态良好,钢轨磨耗较小...     

60N钢轨18号无砟道岔的运用研究

60N钢轨18号无砟道岔在京沈客运专线喀左站进行了试铺,通过预打磨试验、联调联试道岔动力学性能测试及开通后服役性能分析,验证其在高速条件下的适应性。结果表明:60N钢轨道岔可实现与区间60N钢轨的匹配,与60 kg/m钢轨18号无砟道岔预打磨相比减少打磨工作量60%以上,打磨质量更容易保证;综合检测列车以不同速度通过60N钢轨18号无砟道岔时,安全性、平稳性、舒适性和道岔结构动力学等指标均满足列车运行要求。与60 kg/m钢轨18号无砟道岔列车动力学性能测试结果对比表明,构架脱轨系数和轮轨横向力峰值有所降低,其他动力学指标基本相当;60N钢轨18号无砟道岔服役性能试验结果表明,钢轨服役性能良好,无明显磨耗及伤损情况产生。     

Ni60自熔性合金高频感应熔涂组织分析

研究分析了Ni60自熔性合金高频感应熔涂组织。结果表明:高频感应熔涂Ni基涂层与基体形成了良好的冶金结合,涂层与基体之间存在明显的扩散转移带,涂层组织中存在明显的柱状晶。高频感应熔涂涂层中有丰富的增强耐磨性的杂质相,能显著提高基体表面硬度。     

Formation of Denmark Strait overflow water and its hydro-chemical composition

The dense overflow across the Denmark Strait is investigated with hydrographic and hydro-chemical data and the water mass composition of the Denmark Strait Overflow Water (DSOW) is determined by multivariate analysis. Hydrographical properties, the transient tracers CFC-11 and CFC-12, oxygen and nutrients are utilized for the water mass definitions. Distribution and characteristics of water masses north of Denmark Strait are described, the important water masses at the sill and the variability on weekly time-scales are discussed, and the entrainment and mixing of water into the overflow plume in the northern Irminger Basin is calculated. The analysis indicates that water masses both from the Nordic Seas and the Arctic Ocean are important for the formation of DSOW. It is found that water masses transported with the East Greenland Current make up about 75% of the overflow at the sill. The overflow at, and shortly south of, the sill is inhomogeneous with a low-salinity component dominated by Polar Intermediate Water. The high-salinity component of the overflow is mainly of Arctic origin. The water mass composition, and the short-term variability for 7 repeats of sections close to the sill are described, and these illustrate that the overflow is in fact a composite of a number of water masses with different formation and transport histories. This indicate that the overflow is a robust feature, but that it responds to variations in the circulation or atmospheric forcing that influences the formation of intermediate and deep water masses within the Arctic Mediterranean and the North Atlantic. At a section about 400 km south of the sill the overflow is well mixed and modified by entrainment of, mainly, Iceland–Scotland Overflow Water and Labrador Sea Water, together constituting 30% of the overflow plume. The entrainment of Middle Irminger Water dominates shortly downstream of the sill, before the overflow plume reaches too deep but the entrainment seems to be intermittent in time.     

数字辐射流动可视化系统设计与实现

介绍了一种利用数字辐射成像技术来实现高压不透明输送管道中高固多相黏稠物料流动成像的^60Co数字辐射流动可视化系统。首先阐述了该数字辐射流动可视化系统的总体构成,包括系统的基本原理和研制概况,进而介绍了该可视化系统的性能指标以及功能特点。该^60Co数字辐射流动可视化系统以扫描方式工作,能直接获得数字图像,可用于高压不透明输送管道中密相固液多相流流动机理的研究,其应用对推动高固多相黏稠物料管道输送及处置技术的发展具有重要意义。     

提速铁路60kg/m轨30号道岔施工工艺——上海南站-春申复线P6030号道岔的铺设

该文介绍了60kg/m轨30号道岔技术特性,详细总结了提速线路铺设P6030号道岔的施工工艺及注意事项。     

船舶阻力计算BP神经网络的研究

建立了基于系列60船模原始实验数据的船舶阻力计算3层BP神经网络系统,利用随机选取的检验样本和插值样本作为输入向量,应用输出与目标的线性回归、相关系数和相对误差,以及利用该神经网络绘制的曲线,验证了该神经网络的可靠性．在该神经网络的建立过程中,对训练函数、性能函数、传递函数、隐层神经元数和神经网络绘制的性能曲线进行了实验,并通过数据预处理方式,确定了最佳的船舶阻力计算3层BP神经网络系统．