基于几种浮置板轨道施工工法的对比研究

针对在浮置板轨道结构的施工过程中合理有效地选择施工工法这一难题,重点介绍并对比分析散铺法、预制钢筋笼法、全预制短板浮置板施工和半预制短板浮置板施工这4种浮置板轨道结构的施工工法,通过分析对比得出,半预制短板浮置板施工方法较其他施工工艺简单,适应能力强,施工周期短,施工成本低,特别适合浮置板轨道快速施工。     

The multi‐actor,multi‐criteria analysis methodology (MAMCA) for the evaluation of transport projects: Theory and practice

In this paper the multi‐actor multi‐criteria analysis (MAMCA) method to evaluate transport projects is presented. This evaluation method specifically focuses on the inclusion of qualitative as well as quantitative criteria with their relative importance, defined by the multiple stakeholders, into one comprehensive evaluation process in order to facilitate the decision making process by the different stakeholders. The MAMCA methodology is introduced by an overview of other evaluation methods for transport projects in the past and is illustrated by means of two practical cases. The introduction will lead us to the theoretical conception of the MAMCA method where we draw the attention to the proven usefulness of the MAMCA for the evaluation of transport projects and the inclusion of different kinds of stakeholders, individuals as well as groups, into the evaluation process.     

回弹法制定混凝土专用测强曲线的步骤和方法

文章基于回弹法的基本原理,结合工程实例,介绍了混凝土专用测强曲线制定的步骤和方法,为道路工程混凝土强度推定提供方法依据。     

在役风险管道检测与评价技术在湖田管线的应用

目前,在役老管道存在防腐层老化、管体腐蚀等问题,急需对在役风险管道进行检测和安全评价。文中以湖田输气站至烯烃厂天然气管线为实例,提出了管道完整性检测技术与安全评价方法,确定管道的现状,并提出相应措施及建议,保障管道安全运行。     

基于收入最大的市郊铁路组合票价制定方法

为获得最佳市郊铁路组合票价制定策略,利用SPSS软件拟合市郊铁路票价与客流量的关系式,通过不同票价折扣获得对应的客流量值,建立基于收入最大的组合票价方案比选模型.以成灌市郊铁路为例进行模型验证,分工作日和节假日、按不同时间段和年龄段分别进行票价组合设定,结果表明:工作日低峰期适当票价折扣、高峰期保持票价不变或小幅度提高票价是最佳组合票价形式;节假日低峰期小范围票价折扣或保持票价不变、高峰期适当提高票价或保持票价不变,是最佳组合票价形式;18岁以下未成年人和56岁及以上老年人适度票价折扣、提高[18,56)岁旅客的票价,是最佳的分年龄段组合票价形式.     

膨胀土的强度特性探讨

文章分析膨胀土抗剪强度影响的主要因素、强度理论和强度指标的取值方法,提出在目前基质吸力测定具有较高难度的情况下,间接测定基质吸力的方法将具有使用和推广价值。     

A review of EVs charging: From the perspective of energy optimization,optimization approaches,and charging techniques

Introduction of electric vehicles (EVs) or plug-in electric vehicles (PEVs) in the road transportation can significantly reduce the carbon emission. Hence, the demand of EVs is likely to increase in the near future. Large penetration of EVs will also ultimately result into high loads on the existing power grids. The controlled charging of EVs can have a significant impact on the power grid load, voltage, frequency, and power losses. In this paper, we have provided a comprehensive review of various energy optimization approaches used for EVs charging. Energy optimization approaches used for EVs not only enhance the battery life but also contribute in regulating the voltage and frequency. During EVs charging, various objective functions such as supporting the renewable energy sources, minimization of the peak load, energy cost, and maximization of the aggregator profit have also been studied from optimization perspectives. The controlled and an optimized EVs charging enhances the performance of EVs batteries and conserves the energy in the system by minimizing the load and power losses. The different EVs charging approaches such as centralized and distributed suited for different objective functions have also been studied and compared with respect to various optimization approaches.     

有色合金炉料配料计算的CAD方法

从生产实际出发，提出了有色合金炉料配料计算的新方法，导出了计算公式并开发了相应的软件．     

静载荷试验试桩曲线分析方法的探讨

详细分析了静载荷试验桩顶沉降的影响因素，对无明显陡降段试桩曲线成果分析方法进行了深入探讨．指出可采用判据计算值所对应的桩顶荷载作为桩的极限承载力近似值，并给出了判据量化表达式。     

求解线性方程组的递推算法

针对求解线性方程组AX=B(A∈R~(m×n),B∈R~m,X∈R~n)的两种迭代格式:(Ⅰ)X~(K+1)=EX~(K)+H;(Ⅱ)X~(K+1)=GX~(K)+F,给出了递推算法。当矩阵A和B不断增加新数据时,不必按新数据计算(Ⅰ)和(Ⅱ)中的相应矩阵,而是在新旧矩阵间建立了递推关系,减少了计算量和计算机内存。