摘要：The main objective of this research is to integrate environmental impact optimization in the structural design of reinforced concrete slab frame bridges in order to determine the most environment-friendly design. The case study bridge used in this work was also investigated in a previous paper focusing on the optimization of the investment cost, while the present study focuses on environmental impact optimization and comparing the results of both these studies. Optimization technique based on the pattern search method was implemented. Moreover, a comprehensive LCA （life cycle assessment） methodology of ReCiPe and two monetary weighting systems were used to convert environmental impacts into monetary costs. The analysis showed that both monetary weighting systems led to the same results. Furthermore, optimization based on environmental impact generated models with thinner construction elements yet of a higher concrete class, while cost optimization by considering extra constructability factors provided thicker sections and easier to construct. This dissimilarity in the results highlights the importance of combining environmental impact （and its associated environmental cost） and investment cost to find more material-efficient, economical, sustainable and time-effective bridge solutions.

摘要：The government subsidy plays an important role in the recycling and remanufacturing process of a closed-loop supply *** paper focuses on the impacts of different patterns of government subsidy on the chain members'profits and the ***,we develop three models in a supply chain including a manufacturer,a retailer and a collector,namely(1)the government invests public service advertisement to stimulate the remanufacturing process(Model AS);(2)the government offers only monetary subsidy to the collector(Model MS);(3)the government allocates the subsidy into two parts,namely both advertisement and monetary subsidy(Model HS).We find that,no matter which subsidy pattern the government adopts,both the manufacturer and the collector are beneficiaries of the government subsidy,and that such subsidizing activity is definitely conducive to the environmental *** into account the chain members,profits and the environmental impact,the optimal hybrid subsidy scheme(Model HS)is more beneficial than that in both Model MS and Model AS,which can be attributed to the combination of the incentives provided by the public service advertisement and the price attraction by the monetary *** also find that,for single advertisement and monetary subsidy,the amount of government subsidy will decide their merits and *** direct monetary subsidy in Model MS will have a greater influence regarding to the supply quantity of used products than the mere advertisement subsidy in Model AS when the subsidy is relatively large.

摘要：In Italy,when building a new school,there are no regulatory or cultural references that consider recent regulations on energy savings and emissions reduction,key environmental considerations that have received increasing notice in society and new teaching methods needs to address these environmental concerns,especially as related to the built *** main goal of this paper is to outline qualitative and quantitative guidelines for building low-carbon kindergartens in *** guidelines will define a new building type for schools while also evaluating energy and environmental performance to create a structured and interdisciplinary support tool that can be used by designers during the preliminary phase of the design *** method starts from the detailed analysis of representative sustainable buildings to define new typological models,then several energy and environmental analyses follow to evaluate the new building type performance,and finally the guidelines are detailed following the environmental and technological system.

摘要：本文聚焦核能的环境影响问题,将解决如下核能发电相关的主要环境问题:(1)控制正常运行条件下核设施的放射性排放,评估其非放射性环境影响(取水与非放射性水的排放);(2)乏燃料与放射性废物的长期管理,主要是通过地质处置库处理的乏燃料或放射性废物;(3)防止和缓解严重核事故以及核事故的放射性释放;(4)改善核安全水平,以限制核能的环境影响,提升公众的核能接受度。核能的温室气体排放水平非常低,可以根据需求供应大规模、可调度电力,在此方面核能具有独特的优势。在正常运行工况下,核电站每年释放到周围公众的有效辐射剂量可以忽略不计。国际社会已经开展了大量的努力,以确定可持续管理地质处置条件下高放长寿命放射性废物的方法。过去几次严重核事故中获得的经验为核能生产相关的安全问题提供了经验,也促成了重要的安全改进,其中包括反应堆的设计和运行管理方面的改善以及事故管理指导方针的制定等。事实证明,这些经验是非常宝贵的。严重事故的环境风险已经被大幅降低,相关的规约也已经建立起来,以最大限度地减少严重核事故条件下放射性物质的释放,并避免大规模的人员疏散。还需要继续采取措施,改善反应堆的安全性,提升核工业与核监管机构的透明度,以进一步降低核能的环境影响。