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941.
942.
943.
土建工程施工中注浆技术的发展 总被引:2,自引:0,他引:2
从注浆技术的定义和分类、注浆材料、注浆方法、注浆效果的监控与检测等几个方面进行综述,介绍了土建工程施工中注浆技术的特点及发展趋势。 相似文献
944.
Stacey G. Bricka Sudeshna Sen Rajesh Paleti Chandra R. Bhat 《Transportation Research Part C: Emerging Technologies》2012,21(1):67-88
Recent advances in global positioning systems (GPS) technology have resulted in a transition in household travel survey methods to test the use of GPS units to record travel details, followed by the application of an algorithm to both identify trips and impute trip purpose, typically supplemented with some level of respondent confirmation via prompted-recall surveys. As the research community evaluates this new approach to potentially replace the traditional survey-reported collection method, it is important to consider how well the GPS-recorded and algorithm-imputed details capture trip details and whether the traditional survey-reported collection method may be preferred with regards to some types of travel. This paper considers two measures of travel intensity (survey-reported and GPS-recorded) for two trip purposes (work and non-work) as dependent variables in a joint ordered response model. The empirical analysis uses a sample from the full-study of the 2009 Indianapolis regional household travel survey. Individuals in this sample provided diary details about their travel survey day as well as carried wearable GPS units for the same 24-h period. The empirical results provide important insights regarding differences in measures of travel intensities related to the two different data collection modes (diary and GPS). The results suggest that more research is needed in the development of workplace identification algorithms, that GPS should continue to be used alongside rather than in lieu of the traditional diary approach, and that assignment of individuals to the GPS or diary survey approach should consider demographics and other characteristics. 相似文献
945.
浅谈旧桥检测与加固技术的应用 总被引:5,自引:0,他引:5
通过在110国道内蒙古段桥梁加固中的施工管理经验,介绍了各类危、旧桥梁的检测分析、加固方案及施工要点。 相似文献
946.
Spiros M. Karakostas 《运输规划与技术》2017,40(3):305-326
The optimal allocation of multiple land uses constitutes a complex multi-objective optimization problem with unknown feasible objective space and optimal planning alternatives. Despite the effectiveness of evolutionary algorithms to capture the underlying Pareto set of optimum maps, land use planners are bound to pursue the best possible spatial allocation of each use within an enormous population of non-dominated solutions. This article presents a novel post-processing methodology enhancing the comparative evaluation of alternative planning approaches without making any assumptions about the (relative) importance of each objective function. The proposed consolidated post-processing module is applied in a land use planning paradigm, revealing: (a) the existence of substantial planning guidelines whose validity is not affected by the relative significance of each criterion and (b) the variable planning component emerging from the (varying) relative importance of objective functions. Such planning feedback could not be extracted by the exhaustive review of non-dominated maps. 相似文献
947.
The Austin MetroRail line in Texas, U.S.A. began operations in 2010 and since then transit-oriented development projects have been fuelled around train stations. Traditional location theory holds that proximity to a transit station should be capitalized into land prices, and numerous empirical studies have demonstrated the effects with mixed results. However, to date no empirical study has investigated this relationship between the newly built rail line and land prices in Austin. This study fills the research gap and suggests a positive effect associated with transit proximity by employing spatial hedonic models. This study also contributes to the existing literature especially in the context of Texas cities where there is a lack of relevant research on transit-capitalization-related topics, and provides insights for decision-makers with different perspectives regarding further rail investment or transportation financing strategies such as value capture programs. 相似文献
948.
949.
介绍了基于微机控制的、采用直流高压泄漏电流试验法的电机绝缘检测装置的原理,阐述了该检测系统的硬件和软件设计方法。主程序主要由泄漏电流检测、检测参数设置、检测结果查询、串行通信等模块组成。该检测装置经现场使用,取得了良好的效果。 相似文献
950.
目前我国公路工程质量问题层出不穷,因此加强公路工程试验检测,提升公路工程质量显得尤为重要。为此,针对公路工程试验检测中存在的问题,提出了相应的完善对策,指出只有加强施工单位对试验检测重要性的认识,不断完善监理制度,才能推进试验检测工作的发展,进而促进公路质量的提升。 相似文献