VOGELESUPER1800型沥青混凝土摊铺机的运用技术

通过ＶＯＧＥＬＥＳＵＰＥＲ１８００型沥青混凝土摊铺机自动找平系统的安装与调试、摊铺运行前的检查、摊铺运行中的控制以及摊铺工作后保养四个方面。详细介绍了沥青摊铺机的运用技术。     

我国在用车检查与保养制度的研究

本文介绍了国内外近年来有关轻型在用车检查与保养（I／M）制度，国外在用车的检测方法以及《机动车排放污染防治技术政策》，分析了我国提高机动车尾气排放质量、改善在气状况的目标和现状，对国外通行的几种在用车检测方法，并提出了适合我国国情的检测方法。     

在线检测技术在车身焊装生产中的应用

在线检测技术不仅使车身焊装过程中各种故障的检测更为有效，快捷和准确，而且还为监视工艺装备的工作状况，预报其可 在线检测技术的技术原理，实施路线和关键难点，并用实例对其驾介绍。     

发动机综合测试系统的研制

为满足发动机出厂前综合测试的需要，研制了一套发动机综合测试系统。介绍了这套以单片机为核心的发动机综合测试系统的构成、工作原理、硬件和软件设计特点。实践证明，该系统的应用，既提出了测试精度和效率，又强化了生产和质量管理，从根本上保证了出厂发动机的检测质量。     

CA488型发动机凸轮轴及曲轴铸造质量检测新技术

介绍了采用初始磁导率法和扫频共振法对发动机凸轮轴及曲轴铸造质量进行综合检测的原理和方法，研制出的ＱＪＣ－Ｂ型和ＱＪＣ－Ｄ型球铁质量检测仪并应用于生产，取得了令人满意的效果，该检测仪不仅能检测铸态球铁的珠光体含量和球化率，还能检测铁素体含量，改换传感器，还能检测任何形状的铸态球铁零件，并且具有精度高，速度快，抗干扰能力强，检测后工件无剩磁，功耗低，使用简便及检测结果可靠等优点。     

超限检测装置测试方案和测试用设备的研究

铁路货车超限检测装置用于动态检测和记录铁路货车装载状态,是保障铁路货运安全的重要技术手段之一。为了实现检测装置的量值溯源和运行质量控制,需要有一套科学的测试方案和可靠的测试设备。文章介绍了铁路货车超限检测装置检测超限货物的原理,并对研究设计的超限检测装置测试设备和测试方案进行说明。     

动车组车载检测设备计量保证方案建议

动车组车载检测设备用于动车组运行过程中主要参数的检测或监测,在这些设备中,有些设备因不能拆卸而无法进行量值溯源。为此,提出用计量保证的方式来确认其计量性能及量值的准确性,为列车安全运行提供技术支持。     

Travel time statistical modeling with the Halphen distribution family

ABSTRACT

This article introduces the Halphen distribution family for modeling travel time distributions and their reliability on single road links. This probability family originally used in hydrology has a set of relevant characteristics. It is composed of three probability distribution functions for which the mathematical properties are described here. The article uses a graphical representation, the δ-Moment Ratio Diagram (δ-MRD). This tool allows characterizing travel time reliability as well as selecting best distribution candidates within the fitting processes, by considering empirical data sets. A systematic methodology is developed to take advantage of both aspects. From maximum log-likelihood estimation, it is shown that Halphen distributions are among the best state-of-the-art solutions for the travel time modeling purpose. This global framework is validated using two empirical data sets: an urban data set gathered in Portland, Oregon (USA), and a periurban data set from Lyon (France). The model calibration is eased through the use of the δ-MRD; this property opens new research directions about the mapping between traffic states and statistical modeling. It comes from all these considerations that the Halphen family is suitable to describe accurately the travel time dynamics on single links. Therefore, it could be part of a decision support system for practitioners interested in travel time variability.     

Airline flight scheduling for oligopolistic competition with direct flights and a point to point network

In this research, we consider a flight scheduling problem for oligopolistic competition with direct flights and a point to point network. In this type of market situation, passengers are sensitive to the departure time of a flight rather than the transfer time. The airline needs to carefully consider the departure times of their competitors when determining their own. Therefore, unlike past approaches which have only considered one departure time for a competitor's flight, a flight scheduling framework is developed which takes into consideration possible competitor departure times. The framework includes two dependent stages which are repeatedly solved during the solution process. In addition, an upper bound model is also designed to evaluate the solution quality. Numerical tests are performed using data for Taiwan's outlying island route which is characterized by the above market situation. Satisfactory results are obtained, showing the good performance of the framework. Copyright © 2017 John Wiley & Sons, Ltd.     

中世纪基督教文化对近代科学思想形成的作用

中世纪基督教文化继承了古希腊哲学思想与自然科学知识相结合的学术传统 ,亚里士多德的学说成为基督教文化的知识基础。同时 ,中世纪基督教文化包含了各种异端思想材料 ,使思想的自由在实证自然科学的基础上得到发展 ,促使了近代科学思想的产生