污染程度的模糊综合评判

污染程度的确定受多种污染因素的影响和制约，本文运用模糊数学理论与方法分析了各种污染影响因素的模糊性和随机性，通过主观和客观评价，模糊变换而得出了污染程度的综合评判模式，为企业生产的环境管理和决策提供了科学依据。     

基于模糊网络和时间依赖的应急车辆调度优化研究

突发灾害的应急物资调度是减轻人民财产损失、防止次生灾害发生、保障社会稳定的必要支撑。借助模糊数学中的三角模糊数学方法对不确定的需求信息特征进行描述,用模糊函数积分确定车辆在路段的模糊行驶时间。以应急车辆调度的总时间最短为调度的主要目标,同时配送数量应最大限度地满足需求点的需求量为次要目标建立应急车辆调度模型。然后设计粒子群算法对模型进行求解。最后通过算例,验证建立的模型拟合现实中的情况,结果不是确定数值,而是模糊数值范围的优化。     

不确定性条件下危险废物物流LRP建模与求解

在危险废物产量不确定的条件下,为解决加工中心建设点、加工技术和危险废物车辆运输路径的选择问题,考虑危险废物与加工技术的多样性、危险废物与加工技术的相容性,设定风险公平性的度量方法,以风险和成本最小化,风险公平性最大化为优化目标,建立危险废物产量为三角模糊数的多目标模型。根据三角模糊数的特征转化模糊约束条件,将原模糊模型转化为多目标0～1混合整数线性规划模型,并基于模糊优化技术设计多目标线性规划模型的求解方法。最后,算例结果表明,相对于既有模型,新模型所得的优化方案能降低风险和成本。     

城市隧道机电系统模糊综合安全评价

本文对城市隧道机电系统安全指标进行了分析,应用模糊数学理论建立了模糊综合安全评价指标体系和模型,并以厦门云顶隧道为例,对该隧道机电系统进行了模糊综合安全评价,得出隧道机电系统安全运营状态,对提高城市隧道机电系统安全管理水平具有重要的意义.     

因果图和模糊综合风险评价在城市燃气输配系统的应用

针对复杂的城市燃气输配系统,利用因果图和模糊综合评价相结合的方法对其进行风险分析.因果图能找出影响城市燃气输配系统失效的因素,模糊综合评价则可在其基础上对风险量化.以某市的燃气输配系统为例描述了该方法的步骤.结果表明,因果图和模糊综合评价相结合的方法合理且易于工程应用.     

工业园区环境风险管理研究

区域经济的快速发展带来了更多的环境风险隐患.本文通过分析工业园区环境风险管理的各个因素,建立了工业园区的环境风险管理水平评价指标体系,并根据工业园区环境风险的特点,利用模糊数学方法建立其评价模型.在此基础上,将环境风险总费用定义为风险实际期望损失、人群心理损失和风险控制费用三部分的总和,并根据系统效益最大化原则,提出了风险控制水平的优化理论.最后以泰兴化工园区为例,模型和理论进行了应用.园区环境风险管理水平评价结果为"中",方案四为最优的管理方案.     

基于多层次模糊综合评判的人疲劳综合评价

疲劳是一种复杂的生理和心理现象,易引发事故。目前对疲劳的测定多采用主观感觉测试法,仅对罗列症状做出“有”与“无”的判定,不能对症状的程度做出量化判断。笔者应用模糊数学中多层次模糊综合评判原理,通过确定人的疲劳因素集及其评价集,构建了人疲劳的综合评价模型。制定了疲劳指标评估表,确定了各指标的权重,实现了对疲劳的定量分析,对人的疲劳状况进行了综合评价,并进行了实例分析与计算,其结果符合客观实际,具有一定的科学性、合理性和较强的实用性,对劳动者的安全健康保护,对职业卫生工程、人机工程、安全管理工程均有重要的参考价值,对安全生产具有一定的指导意义。     

Ecological and Economic System Health Assessment Based on Fuzzy Set Pair Analysis: A Case Study of Northwest Region,China

Abstract

Due to the increasingly serious environmental pollution and destruction, especially humans’ unreasonable activities, the ecological and economic system (EES) issues of Northwest region in China have attracted more and more attention of the researchers. Aiming at evaluating its ecological and economic system health, a multi-objective evaluation framework called Pressure- State-Response (PSR) was established to describe the ecological and economic health situations. Meanwhile, an integrative set pair model combining set pair analysis (SPA) and fuzzy analytic hierarchy process (FAHP) was proposed to assess the ecological and economic system. Then the EES status of five northwest provinces (Shanxi, Gansu, Qinghai, Ningxia and Xinjiang) of Northwest region in China was evaluated during 1985 to 2009. The EES development trends of five provinces are obtained. In general, the health values of five provinces showed a rising trend. The health values of five provinces grew rapidly during 1985 to 2000. After 2000, the health values of five provinces still followed the present growth trend, but the growth is relatively smooth. The results show that the method proposed is effective for assessing the health of ecological and economic system.     

基于AHP与模糊综合评价的土地整治项目实施后效益评价

对土地整治项目实施后效益评价进行科学研究,对于规范与指导土地整治的实践活动,实现土地整治的科学决策具有重要意义。以湖北省长阳土家族自治县土地整治项目为例,以相关研究理论为指导,在充分收集项目区基础资料的基础上建立了一个由15个指标所组成的效益评价指标体系,将景观效益作为一个独立的评价方面,拟为土地整治效益评价的完善做出有益探索。运用层次分析法确定各指标因子的权重,以多层次模糊综合评价法构建评价模型,对项目区土地整治前后的经济效益、社会效益、生态效益、景观效益和综合效益进行了评价研究。研究表明项目实施使得各效益均有明显提高,但社会效益和生态效益还有较大提升空间。另外,景观效益潜力巨大,在今后的项目实施中应得到更多的重视,并将其作为土地整治项目实施后效益评价研究的一项重要内容     

A hybrid model for remanufacturing facility location problem in a closed-loop supply chain

Traditional supply chain design is merely based on the open loop or forward flow of materials, neglecting reverse flow for recovery of materials despite the recent concerns of customers and governments about environmental and production cost reductions. New supply chain design should be closed loop which implements traditional supply chain concepts with reverse flow or a material recovery system to reduce production cost and enhance customer satisfaction about environmental consciousness and to meet legal requirements. In our research, we designed a closed-loop supply chain which consists of recovery options such as collection centres and remanufacturing plants (reverse flow) in addition to traditional supply chain tiers (forward flow), and tried to find the best location for these facilities in a discrete space based on decision makers' opinions. Since there are uncertainties about decision parameters in an uncapacitated facility location problem, we implemented the fuzzy TOPSIS method to solve the location decision problem and find the best place to locate a remanufacturing facility.