Development trajectory for the temporal and spatial evolution of the resilience of regional tourism environmental systems in 14 cities of Gansu Province,China

Environmental Science and Pollution Research - The rapid development of the urban economy in China and the accompanying income growth experienced by urban residents have increased demand for...     

欧盟重金属污染防治历程及启示

通过综合学习借鉴发达国家不同历史阶段污染防治的历程与积累的经验,有助于我国在比较的视野中正确认识我国重金属污染防治中存在的问题,以及学习借鉴他国的经验教训,探索属于自己的跨越式发展道路,包括污染防治政策制度设计、环境管理经验、各国的协调合作等。     

生产事故隐患排查治理及预警管理信息系统研究

以"一企一标准、一岗一清单"的安全生产管理思路为中心,在深入研究企业安全生产管理中事故隐患排查治理及预警的主要功能需求和业务逻辑的基础上,构建以隐患排查治理为核心的生产事故隐患排查治理及预警信息系统的基本架构,并通过管理信息系统技术手段与安全系统工程理论的结合,在安全生产管理方法创新的基础上,进一步建立高效和优化的安全管理信息化解决方案,以规范生产企业安全行为,细化和明晰安全职责,强化安全预防意识。该系统以隐患作为管理对象,确保对隐患及时的排查和有效管控,可有效杜绝事故的发生。     

南昌井水位对远震的同震响应分析

通过对2001—2008年间139次震例数字化资料的总结,定性分析了南昌井水位资料对强远震的响应情况,并采用二阶回归方法对模型进行优化和定量分析。研究认为:南昌井水位资料对强远震响应较好,同震响应幅度与震级、震中距综合相关,响应距离随震级增加而增加,但在各震级档中均存在距离上限。     

小城镇大气污染防治探索

随着乡镇企业的急剧发展和居民冬季采暖期燃煤量的不断增加,虎林镇的大气环境质量不断恶化,大气污染在逐年加重,为了治理大气污染,防止大气环境质量的继续恶化,虎林市人民政府采取热电联产的办法,有效的防止了大气污染的继续加重,改善了虎林市的大气环境质量.通过五年来热电联产的实际运营,由环境监测资料表明,小城镇大气污染防治的行之有效的办法之一是热电联产.集中供热.     

A dynamic model for assessing the effects of management strategies on the reduction of construction and demolition waste

During the past few decades, construction and demolition (C&D) waste has received increasing attention from construction practitioners and researchers worldwide. A plethora of research regarding C&D waste management has been published in various academic journals. However, it has been determined that existing studies with respect to C&D waste reduction are mainly carried out from a static perspective, without considering the dynamic and interdependent nature of the whole waste reduction system. This might lead to misunderstanding about the actual effect of implementing any waste reduction strategies. Therefore, this research proposes a model that can serve as a decision support tool for projecting C&D waste reduction in line with the waste management situation of a given construction project, and more importantly, as a platform for simulating effects of various management strategies on C&D waste reduction. The research is conducted using system dynamics methodology, which is a systematic approach that deals with the complexity - interrelationships and dynamics - of any social, economic and managerial system. The dynamic model integrates major variables that affect C&D waste reduction. In this paper, seven causal loop diagrams that can deepen understanding about the feedback relationships underlying C&D waste reduction system are firstly presented. Then a stock-flow diagram is formulated by using software for system dynamics modeling. Finally, a case study is used to illustrate the validation and application of the proposed model. Results of the case study not only built confidence in the model so that it can be used for quantitative analysis, but also assessed and compared the effect of three designed policy scenarios on C&D waste reduction. One major contribution of this study is the development of a dynamic model for evaluating C&D waste reduction strategies under various scenarios, so that best management strategies could be identified before being implemented in practice.