FINE-GRAINED DISTRIBUTED MULTIMEDIA SYNCHRONIZA-TION MODEL——ENHANCED FUZZY-TIMING PETRI NET

IntroductionDistributed multimedia systems integrate a va-riety of media,including time dependent media,such as audio and video,and time independent me-dia,such as text,graphics,and images.Multime-dia synchronization refers to the temporal composi-tion of the data streams. Strams can be composedof temporal series of information units called Logi-cal Data Units (LDU) (e.g.,a video stream is atemporal series of video frames) .Multimedia synchronization can be modeledaccording to different gra…     

如何从设计、招标、施工及监理四环节保证高等级公路的工程质量

就目前高等级公路建设中存在的问题 ,提出要从设计、招标、施工、监理四个环节上进行强化管理 ,提高人员素质 ,引入竞争机制 ,加强内容管理 ,确保工程质量。     

ISO9000标准质量体系认证过程及体会

详细介绍了哈尔滨市道路桥梁工程处质量体系认证过程 ,特别强调了其中的人员培训教育工作和质量体系文件编制工作及内审工作的运作 ,为交通系统其它单位通过ISO90 0 0标准体系认证提供了一些可供借鉴的经验。     

浅析计量工作在施工中的作用

在公路施工过程中受竞标和质量控制的要求 ,计量工作越来越显示出其重要的作用 ,要做好计量工作必须做到以下几点 :明确计量程序、明确计量依据、明确工程量清单中的各章的计量     

论高校学报编辑应具备的素质

高校学报发表的文章科技含量高、学术性理论性强,因而对学报编辑人员的素质提出很高的要求．本文就知识经济和网络经济时代学报编辑人员应具备的素质作了较详细的论述．     

新确报格式的设计及实现

铁路确报是铁路运输生产的重要内容,是铁路TMIS中重要的信息之一,既有的确报格式存在一些弊端,更改确报格式已成为提高确报信息质量的必须工作.介绍新确报格式内容以及实现流程.     

Index numbers for monitoring transit service quality

The measurement of transit service quality is very important for guaranteeing a transport supply characterized by satisfactory service levels for the passengers. Even more important is the monitoring of the levels of service quality over time, which can be very useful to determine if the goals established by the transport planners are being met or exceeded. The status and evolution of transit service quality can be monitored through periodic and regular updating of the opinions expressed by the passengers about the service during the well-known Customer Satisfaction Surveys, allowing the effect of policies to be evaluated and specific interventions to be introduced. In this work, just the issue of monitoring service quality based on users’ opinions is approached, and the index numbers usually applied in the economic and industrial field are proposed for this purpose. Index numbers permit to study the fluctuations or variations of a variable or more variables over time, providing a powerful measurement for making comparisons and predictions of the analyzed concept. The index numbers were calculated on the basis of data collected from Customer Satisfaction Surveys addressed to the passengers of the metropolitan public service of Granada (Spain). The analyzed time period has been established from 2007 to 2013. Interesting results derive from the calculation of the index numbers. Since both perceptions and importance rates are considered in this methodology, the results can inform, not only on the satisfaction tendencies but also on the trend on customers’ priorities, which is actually the expected quality. Therefore, policies could more efficiently be designed to adjust the service to the users’ real needs.     

液压锚机齿轮质量问题探讨

针对船舶液压锚机在检验过程中暴露的质量问题,从齿轮表面质量、齿轮啮合不正常磨损及齿轮啮合噪声等4个方面进行讨论分析,提出相应的解决措施。     

Cruise activity and pollution: The case of Barcelona

One of the main causes of mortality worldwide is air pollution. To tackle this problem, local, regional and national governments have implemented policies to reduce emissions from industrial and on-road sources. However, when these policies are being designed, shipping emissions are often overlooked. There has been a drastic increase in the demand for cruises and its economic relevance is also growing in port-cities. Barcelona is Europe’s leading cruise port, and it is located near the centre of the city. In this context, this paper analyses the impact of cruise ships in the air quality of the entire city of Barcelona using a dataset with information about pollutants and the number of cruises arriving to the port. We show that there is a direct impact between cruises staying at the port and city pollution. Additionally, the size and age of the cruise also affect air quality. The larger (or newer) the cruise is, the higher the emission generated. Moreover, our simulations show that the whole city is affected by these emissions.