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331.
A fuzzy analytic network process for multi-criteria evaluation of contaminated site remedial countermeasures 总被引:4,自引:0,他引:4
Promentilla MA Furuichi T Ishii K Tanikawa N 《Journal of environmental management》2008,88(3):479-495
The Analytic Network Process (ANP) has been proposed to incorporate interdependence and feedback effect in the prioritization of remedial countermeasures using a hierarchical network decision model, but this approach seems to be incapable of capturing the vagueness and fuzziness during value judgment elicitation. The aim of this paper is to present an evaluation method using a fuzzy ANP (FANP) approach to address this shortcoming. Triangular fuzzy numbers (TFN) and their degree of fuzziness are used in the semantic scale as human judgment expressed in natural language is most often vague and fuzzy. The method employs the alpha-cuts, interval arithmetic and optimism index to transform the fuzzy comparative judgment matrix into set of crisp matrices, and then calculates the desired priorities using the eigenvector method. A numerical example, which was drawn from a real-life case study of an uncontrolled landfill in Japan, is presented to demonstrate the process. Results from the sensitivity analysis describe how the fuzziness in judgment could affect the solution robustness of the prioritization method. The proposed FANP approach therefore could effectively deal with the uncertain judgment inherent in the decision making process and derive the meaningful priorities explicitly from a complex decision structure in the evaluation of contaminated site remedial countermeasures. 相似文献
332.
The Process Safety Management (PSM) systems at the operating facilities in the Oil & Gas and in Chemical manufacturing industries have matured over the years and have become, at most facilities, very robust and sophisticated. These programs are administrated by Process Safety (PS) teams at both the corporate business units and plant levels and have been effective in reducing the number and severity of PS events across the industries over the past 25 years or so. Incidents however are occurring at a regular interval and in recent times several noteworthy PS events have occurred in the United States which have brought into question the effectiveness of the PSM programs at play. These facilities have been applying their PSM programs with the expectation that the number and severity of PS events would decrease over time. The expected result has not been realized, especially in context to those facilities that have undergone the recent incidents. Current paper reviews a few publicly available PS performance reports of Oil & Gas and Chemical manufacturing industries. The authors identified a few factors at play that have led to these PS events based on their experience, literature review, and incident investigation reports. Most of the factors are intertwined with multiple PSM elements and it requires a holistic approach to address them. Each of the factors is described and the path forward is proposed to improve the effectiveness of PSM programs. 相似文献
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334.
从分析电器电子产品生命周期内流转环节的传统模式及其存在的问题入手,系统阐述了构建废弃电器电子产品回收处理的"付费制度体系",以及制造商责任制、消费者义务制和全过程管理等基本原则,并对废弃电器电子产品回收处理的"付费制度体系"生命周期模型的运转方式及其重要意义进行了论述。 相似文献
335.
高级氧化法处理难降解有机废水研究进展 总被引:2,自引:0,他引:2
综述了几种高级氧化法包括Fenton法、O3/UV法、O3/H2O2法、UV/H2O2法、O3/UV/H2O2法和TiO2法的反应机理、特点及在难降解有机废水处理中的应用进展,并对高级氧化法存在的问题及今后的研究方向进行了探讨。 相似文献
336.
改进层次分析法与模糊综合评价的耦合模型在水质评价中的应用 总被引:4,自引:0,他引:4
对传统的层次分析法进行了改进,利用0.1~0.9五标度建立互补型的模糊判断矩阵,并把和行归一法或方根法与特征向量法结合使用,提出了改进的层次分析法与模糊综合评价的耦合模型,并将该模型应用于吴淞江(苏州段)水环境质量评价中.对评价结果的最大隶属度原则进行了改进,采用加权平均原则对评价结果综合评判与排序. 相似文献
337.
在介绍储罐泄漏类型与泄漏危害的基础上,以原油储罐破裂事故为例,分析了储罐破裂的原因,进而阐述了原油储罐生命周期内完整性的控制。 相似文献
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339.
Wei Tze Mook Mohammed A. Ajeel Mohamed Kheireddine Arou Ma?gorzata Szlachta 《环境科学学报(英文版)》2017,29(4):184-195
In this work a novel anode configuration consisting of an iron mesh double layer is proposed for the electrochemical treatment of wastewater. The removal of Reactive Black 5 dye(RB5) from synthetic contaminated water was used as a model system. At a constant anode surface area, identical process operating parameters and batch process mode, the iron mesh double layer electrode showed better performance compared to the conventional single layer iron mesh. The double layer electrode was characterized by RB5 and chemical oxygen demand(COD) removal efficiency of 98.2% and 97.7%, respectively, kinetic rate constant of 0.0385/min, diffusion coefficient of 4.9 × 10~(-5)cm~2/sec and electrical energy consumption of 20.53 kWh/kgdye removed. In the continuous flow system, the optimum conditions suggested by Response Surface Methodology(RSM) are: initial solution p H of 6.29,current density of 1.6 m A/cm~2, electrolyte dose of 0.15 g/L and flow rate of 11.47 m L/min which resulted in an RB5 removal efficiency of 81.62%. 相似文献
340.