兰新铁路第二双线穿越大风区综合选线研究

大风区段对铁路的建设及运营安全存在着各种危害,高速铁路由于具有速度高、车体轻的特点,其安全受到强风威胁会更大,高速铁路穿越大风区防风设置是世界性难题,目前尚无已成功运营的先例,高速铁路大风区综合选线需综合考虑防风设置、防排水、防沙、接触网防风等因素,科学合理进行方案比选研究。通过分析新疆境内四大风区分布及特点,利用既有兰新铁路设施及防风科研成果,对兰新铁路第二双线在穿越大风区段落综合进行选线设计研究,充分分析路基地段的防风设施设置以及线路平纵断面的防风布置选择,确保高速铁路在大风区安全、快速通过,以确定科学、合理的线路设计方案。     

道路工程的用地困难问题与其“虚属性”的迫切性要求分析

现有工程建设大多面临着直接、机械式的制约后续工程建设用地、后续工程建设持续发展困难的问题。文中从虚工作既不占用时间、也不占用社会生活环节的资源，但它具有时间指标、时间属性虚资源这个角度．提出采用无机动时差的双代号网络进度计划图所实现的“虚工作”的虚特性，解决占地、后续工程持续发展困难等问题的方法。它从虚工作（具有时间属性）的维系客观背景所带来的新的工程客观条件和合乎社会的时代步伐、节拍基础上，解决了工程占地、资源重复利用方面的困扰。它能够满足地区或国家建设领域的稳定、安全发展需要。     

京港澳高速公路河北段改扩建工程研究

介绍了原路基宽度和改扩建后新路基宽度。描述了原有路基状况、改扩建路基用土石方数量和来源及对特殊路基采用的技术措施、路基防护手段、新建及改造路段路面结构,为同类工程提供技术参考。     

Community Participation in Marine Protected Area Implementation: A Case Study of the Sitka Local Area Management Plan

This article has two goals: (1) to consider the underlying semantic confusion surrounding the promotion of “social science” in the design and establishment of marine protected areas and (2) to demonstrate the successful community processes that led to the designation of Sitka, Alaska's Local Area Management Plan (LAMP) for halibut fishing in the vicinity of Sitka. Uniting a collection of diverse “social” issues creates ambiguity in actual problem solving—extensive generalization can not resolve a specific issue. The Sitka LAMP is a specific case with clear details and a traceable history of success, designed to sustain the healthy status of Sitka's local halibut resource. The development of the Sitka LAMP designation demonstrates the importance of community collaboration and exhibits methods that could potentially be modeled in other locations.     

关于公路工程施工机械日常管理的探讨

公路工程施工机械在公路建设施工中起着重要作用,工程机械现代化为现代企业的发展带来了新的发展机遇.完整、严格的工程机械设备管理制度,对延长机械的使用寿命、提高机械效率等都起着十分重要的作用.     

高速公路工程中的机械设备管理

从机构、制度建立,设备配置,维护人员水平,使用与保养关系等角度论述高速公路中机械设备管理存在的问题,并有针对性的提出解决措施,具有一定的应用价值。     

Analysis of three independent real-world driving studies: A data driven and expert analysis approach to determining parameters affecting fuel economy

It is well established that individual variations in driving style have a significant impact on vehicle energy efficiency. The literature shows certain parameters have been linked to good fuel economy, specifically acceleration, throttle use, number of stop/starts and gear change behaviours. The primary aim of this study was to examine what driving parameters are specifically related to good fuel economy using a non-homogeneous extended data set of vehicles and drivers over real-world driving scenarios spanning two countries. The analysis presented in this paper shows how three completely independent studies looking at the same factor (i.e., the influence of driver behaviour on fuel efficiency) can be evaluated, and, despite their notable differences in location, environment, route, vehicle and drivers, can be compared on broadly similar terms. The data from the three studies were analysed in two ways; firstly, using expert analysis and the second a purely data driven approach. The various models and experts concurred that a combination of at least one factor from the each of the categories of vehicle speed, engine speed, acceleration and throttle position were required to accurately predict the impact on fuel economy. The identification of standard deviation of speed as the primary contributing factor to fuel economy, as identified by both the expert and data driven analysis, is also an important finding. Finally, this study has illustrated how various seemingly independent studies can be brought together, analysed as a whole and meaningful conclusions extracted from the combined data set.     

谈公路机械设备日常维护和保养

总结公路机械设备的日常维护和保养的重要性及要求,并从多个角度论述了机械设备日常维护和保养的措施及注意事项,对于指导实际工作有一定的意义.     

公路施工机械的管理与维护

随着公路施工机械化水平不断的提高,施工机械已成为工程进度、成本和质量控制的关键因素。开展公路施工机械的管理和维护,并充分发挥其效益是当今许多施工企业都要面临的课题。