uls

Analysis on Locations for Urban ULS Logistics Links Based on Set Covering Model

基于集合覆盖模型的城市ULS物流节点选址分析

Since its establishment in1963 , the ULS has been providing resources and services to support learning , teaching , and research activities in all disciplines of the University .

大学图书馆系统自一九六三年成立以来，为香港中文大学各学科提供资源及服务，支持不同的学术计划、教学、及研究。

So , it is necessary to carry out some research not only on load-carrying ability in ultimate limit state ( called ULS thereafter ), but also on SLS .

因此，不仅要对其进行承载力极限状态的研究，更要重视对其在正常使用极限状态下的相关研究。

The existing studies on HSC structural reliability are mainly focused on ultimate limit state ( ULS ), however , the research on serviceability limit state ( SLS ) and time-dependent reliability due to durability problems has been limited .

已有的研究主要针对的是高强混凝土构件的承载能力极限状态，而对正常使用极限状态和耐久性问题引起的时变可靠度则研究得很不充分。

In this paper , the concept and research status of the underground logistic system are expounded , then the status of Beijing 's traffic jams is analyzed , and its necessity in Beijing is explained , and position and request of developing Beijing 's ULS are put forward .

文章阐述了地下物流的概念以及该领域的研究动态，分析了北京交通拥堵的现状，说明了北京发展地下物流系统的必要性，提出了北京发展地下物流系统在未来的定位和要求。