Reverse logistics programming model of electronic wastes with fuzzy parameters
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摘要: 通过对彩色电视、电冰箱、空调、洗衣机、电脑、手机6种电子废弃物的逆向物流网络结构的选择, 建立了带有模糊参数的电子废弃物逆向物流规划模型。利用容差法将模糊约束条件清晰化, 把模糊规划模型转化为确定型的线性规划模型, 利用WinQSB软件对模型求解。结合广西的交通运输发展状况, 参照其他地区电子废弃物回收处理成本, 计算了不同置信水平下的广西电子废弃物再制造中心、检测中心和填埋场的位置, 确定了广西电子废弃物逆向物流网络。研究结果表明: 在置信水平分别为0.80、0.90、0.95时, 广西电子废弃物逆向物流网络节点的功能没有发生变化, 再制造中心的处理量分别为24 532.22、5 089.72、5 368.5 t。Abstract: A reverse logistics network structure was established for six kinds of electronic wastes including color TV, refrigerator, air conditioner, washing machine, computer and mobile phone, and the reverse logistics programming model of electronic wastes with fuzzy parameters was built. Tolerance approach was used to make fuzzy constraints clear, the fuzzy programming model was turned into a deterministic linear programming model, and the model was solved by using WinQSB software. Considering Guangxi transportation development situation and the disposal costs of electronic wastes in other regions, the locations of remanufacturing centers, testing centers and landfills in Guangxi were calculated respectively at different confidence levels, and the reverse logistics network of electronic wastes in Guangxi was determined. Analysis result indicates that when confidence levels are 0.80, 0.90, 0.95 respectively, the node functions of reverse logistics network for electronic wastes in Guangxi remain unchanged, and the processing quantities of remanufacturing centers are 24 532.2, 25 089.7, 25 368.5 t respectively.
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表 1 预测模糊回收量
Table 1. Predicted fuzzy recycling quantities
t 城市 预测的模糊回收量 南宁 (7 357.7, 735.8, 1 103.6) 百色 (3 188.0, 318.8, 478.2) 钦州 (2 541.0, 254.1, 381.2) 柳州 (4 898.0, 489.8, 734.7) 桂林 (4 872.0, 487.2, 730.8) 玉林 (4 803.0, 480.3, 720.5) 贵港 (4 320.0, 432.0, 648.0) 河池 (2 331.0, 233.1, 349.7) 表 2 固定成本和运营费用
Table 2. Fixed costs and operating costs
地区 回收中心、分检中心 再制造中心 固定成本/ (元·年-1) 运营费用/[元· (年·t)-1] 固定成本/ (元·年-1) 运营费用/[元· (年·t)-1] 台湾 149 552 479~957 4 634 018 1 436~2 872 广西 110 000 350~850 3 500 000 1 300~2 500 表 3 备选中心的运营费用
Table 3. Operating costs of optional centers
城市 备选中心 运营费用/[元· (年·t)-1] 南宁 回收中心(检测中心) 850 再制造中心 2 498 百色 回收中心(检测中心) 413 钦州 回收中心 385 柳州 回收中心(检测中心) 659 再制造中心 2 040 桂林 回收中心(检测中心) 652 再制造中心 2 025 玉林 回收中心(检测中心) 508 贵港 回收中心(检测中心) 405 河池 回收中心 394 北海 检测中心 350 表 4 城镇公路里程
Table 4. Highway mileages of towns
km 区域 南宁 百色 北海 钦州 柳州 桂林 玉林 贵港 河池 来宾 南宁 0 百色 266 0 北海 215 481 0 钦州 117 383 100 0 柳州 262 516 409 379 0 桂林 507 664 654 620 245 0 玉林 270 536 232 332 282 527 0 贵港 182 448 259 225 190 436 92 0 河池 298 331 513 415 195 343 424 333 0 来宾 181 447 328 298 81 326 201 109 276 0 表 5 节点的选择结果及运量
Table 5. Chosen results and traffic volumes of notes
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