一种基于多源信息融合的轴承监测系统研制

针对船舶轴承故障频发的现状,从设备整体的角度出发,综合考虑被监测对象内部各零部件之间的相互作用关系,研究多种信息的有效获取方法及其与设备故障间的内在关系,研制了一种轴承监测系统,能够有效监测轴承状态,诊断故障,使得船员能够及时了解轴承状态,对将要发生故障的轴承进行预防性维修。     

试论高职院校内部教学质量监控信息反馈系统的构建

教学质量信息反馈系统作为教学质量监控体系的必不可少组成部分之一,它有助于不断地完善、修正教学过程的各个环节,它是教学质量提高的前提,本文从信息反馈系统构建的必要性及其遵循的原则入手,试图构建高职院校内部教学质量监控信息反馈系统。     

The possible designation of the Mediterranean Sea as a SECA: A case study

In view of the ongoing discussions concerning the possible designation of the Mediterranean Sea as a Sulphur Emission Control Area (SECA), a modal split model was applied to a case involving the transportation of consolidated cargoes between Thessaloniki, Greece and industrial hubs of northern Germany. A road-only option was assessed against a combined-transport route involving a ferry (Greece–Italy) and a truck-on-train (Italy–Austria) service. The logit model used considers two variables as determinants of the modal selection: transport cost and time. The data are derived from interviews with a small transport service provider, typical for Greece, and are based on actual trips made (revealed preferences). The results predict that the designation of the Mediterranean as a SECA will cause a modal shift in favour of the road-only route by 5.2%, which under certain assumptions can reach 17.1%. However, the environmental implications of the resulting modal choices, calculated through the EcoTransIT World web based tool, are positive in relation to all emissions examined. This is attributed to the longer distance of the combined-transport option in comparison to the road-only one and, the poor environmental performance of the Ro-Pax vessels basically due to the need to maintain a relatively high speed.     

路基设备状态的数字化采集

以普速线既有线工务需求为背景,解析铁路受自然环境影响以及防护性路基设备维护的现状,提出铁路应对灾害险性事件的本质是界定路基设备的完好状态和是否受到冲击。提供了捕捉路基设备状态突变的物理特征并以数字化描述的系列思路。进而对这种信息化建设的工程化实施中,点段勘定、现场探测设备布设、突变门限阈值、系统判别逻辑等,提出建议。     

通信及监控一体化的变电所通信管理装置方案

给出了一种通信、监控一体化的通信管理装置实施方案,该方案适用于高速铁路及城市轨道交通变电所,集成了通信转发和所内监控功能,弥补了现有管理装置硬件容量、性能及后台监控运营维护过程中技术的不足。     

京港澳高速沿线设施功能改造研究

京港澳涿州至石家庄段改扩建工程按A级设置了较完善的沿线设施,通过功能性整体评价提出了改进建议;针对安全设施、监控、收费、通信、供配电照明等设施及房建工程找出不合理之处,提出具体改进方法。     

A real-time impact detection and diagnosis system of catenary using measured strains by fibre Bragg grating sensors

This paper describes an impact detection system using strain signals based on fibre optic sensors(FBG) for the real-time monitoring of the catenary system. The proposed detection system consists of three subsystems: a measuring system, a data processing and analysis system, and a status display and data access system. Because the strain signals obey the normal distribution, to monitor the catenary system in real time, a novel method that combines mobile standard deviation with the mobile Pauta criterion is proposed to distinguish real impact from the strain signal background. The use of this adaptive judging method reduces the misjudgment rate of impacts and improves the impact recognition accuracy. These impacts can be identified by the data analysis system, which provides impact location and their causes using the features of the catenary system. This method can simplify the detection system compared with the traditional location method. An application to a commercial metro line system indicated that the impacts on the catenary system were main caused by overlaps, expansion joints or steady arms, and were verified by correspondence with the floor plan of the catenary and manual inspection results. These results verified the reliability and effectiveness of the proposed impact detection system.     

一种改进的铁路异物侵限监测方案研究

通过对铁路传统异物侵限监测方案的对比分析，提出一种基于智能双电网的异物侵限监测新方案，并对优化方案的工作原理、系统构成等关键技术进行较为详细的描述。     

不利天气高速公路路况车载采集系统研究

分析了不利天气下道路安全状况评估参数及其影响因素，确定了车载路况采集系统的功能，设计了由道路能见度检测、道路环境温湿度检测、路面状况识别、路面微观形貌检测、路况数据定位与路况数据无线传输6个子系统以及检测车、电源系统等组成的路况检测系统，分析了系统设计中的一些关键技术。