【導讀】投放完全廢棄垃圾和可回收利用垃圾；每天有專門公司派運輸車收集垃圾，將垃圾從居民區(qū)運送之中轉(zhuǎn)站，再由中轉(zhuǎn)站運至目的地—垃圾處理中心。仿真程序研究如何設(shè)計物流系統(tǒng)，能夠使收集系統(tǒng)在滿足時間約束、載重約束的條件下，使垃圾處理公司的物流總成本最低。系統(tǒng)配置的項目主要有車輛載重量、隨車工作人員數(shù)、各收集點之間以及停車場和轉(zhuǎn)運站之間的距離信息如表二所示。①固定成本[price]：收集車輛的購買費用；②可變成本[cost]：車輛的行駛費用、維護費用和雇員工資；X1，X2為現(xiàn)有兩種車的噸位數(shù)，X1取值：3，4或5噸；X2取值：；2；；利用資源，一類為無用需銷毀垃圾，兩者比例為1：2。司信譽，成本增加。收集模塊叫車次數(shù)確定之后，車輛根據(jù)需求，沿著最短路徑依次收集垃圾。垃圾中轉(zhuǎn)站，進行卸載操作；如果垃圾車未滿，則駛向下一最近垃圾收集點繼續(xù)收集。元素分為兩類――實體元素和邏輯元素，名稱如下。

　　

【正文】 ARTS (dump003a),cartcapacity) _____________________________________________________________ ELEMENT NAME: dump004 Element Type: Buffer Quantity: 1 Capacity: 65000 Input Option: Rear Output Option: First Search From: Front Actions Input: IF MOD (moddemand (3) + NPARTS (dump004),cartcapacity) = 1 CALL dumpcart001,get4,road7_t,0 VSEARCH road0_1,corppark,road1_2,road1_0,road2_3,road3_4,road4_5,road5_6,road6_5,road6_7,road7_t,roadt_7,road1_0,road3_6,road6_3,road7_0,road0_7,road2_1,get1,get2,get3,get4,get5,get6,get7 ENDIF moddemand (4) = MOD (moddemand (3) + NPARTS (dump004),cartcapacity) _____________________________________________________________ ELEMENT NAME: dump004a Element Type: Buffer Quantity: 1 Capacity: 65000 Input Option: Rear Output Option: First Search From: Front Actions Input: IF MOD (moddemand (3) + NPARTS (dump004a),cartcapacity) = 1 CALL dumpcart001,get4,road7_t,0 VSEARCH road0_1,corppark,road1_2,road1_0,road2_3,road3_4,road4_5,road5_6,road6_5,road6_7,road7_t,roadt_7,road1_0,road3_6,road6_3,road7_0,road0_7,road2_1,get1,get2,get3,get4,get5,get6,get7 ENDIF moddemand (4) = MOD (moddemand (3) + NPARTS (dump004a),cartcapacity) _____________________________________________________________ ELEMENT NAME: dump005 Element Type: Buffer Quantity: 1 Capacity: 65000 Input Option: Rear Output Option: First Search From: Front Actions Input: IF MOD (moddemand (4) + NPARTS (dump005),cartcapacity) = 1 CALL dumpcart001,get5,road7_t,0 VSEARCH road0_1,corppark,road1_2,road1_0,road2_3,road3_4,road4_5,road5_6,road6_5,road6_7,road7_t,roadt_7,road1_0,road3_6,road6_3,road7_0,road0_7,road2_1,get1,get2,get3,get4,get5,get6,get7 ENDIF moddemand (5) = MOD (moddemand (4) + NPARTS (dump005),cartcapacity) _____________________________________________________________ ELEMENT NAME: dump005a Element Type: Buffer Quantity: 1 Capacity: 65000 Input Option: Rear Output Option: First Search From: Front Actions Input: IF MOD (moddemand (4) + NPARTS (dump005a),cartcapacity) = 1 CALL dumpcart001,get5,road7_t,0 VSEARCH road0_1,corppark,road1_2,road1_0,road2_3,road3_4,road4_5,road5_6,road6_5,road6_7,road7_t,roadt_7,road1_0,road3_6,road6_3,road7_0,road0_7,road2_1,get1,get2,get3,get4,get5,get6,get7 ENDIF moddemand (5) = MOD (moddemand (4) + NPARTS (dump005a),cartcapacity) _____________________________________________________________ ELEMENT NAME: dump006 Element Type: Buffer Quantity: 1 Capacity: 65000 Input Option: Rear Output Option: First Search From: Front Actions Input: IF MOD (moddemand (5) + NPARTS (dump006),cartcapacity) = 1 CALL dumpcart001,get6,road7_t,0 VSEARCH road0_1,corppark,road1_2,road1_0,road2_3,road3_4,road4_5,road5_6,road6_5,road6_7,road7_t,roadt_7,road1_0,road3_6,road6_3,road7_0,road0_7,road2_1,get1,get2,get3,get4,get5,get6,get7 ENDIF moddemand (6) = MOD (moddemand (5) + NPARTS (dump006),cartcapacity) _____________________________________________________________ ELEMENT NAME: dump006a Element Type: Buffer Quantity: 1 Capacity: 65000 Input Option: Rear Output Option: First Search From: Front Actions Input: IF MOD (moddemand (5) + NPARTS (dump006a),cartcapacity) = 1 CALL dumpcart001,get6,road7_t,0 VSEARCH road0_1,corppark,road1_2,road1_0,road2_3,road3_4,road4_5,road5_6,road6_5,road6_7,road7_t,roadt_7,road1_0,road3_6,road6_3,road7_0,road0_7,road2_1,get1,get2,get3,get4,get5,get6,get7 ENDIF moddemand (6) = MOD (moddemand (5) + NPARTS (dump006a),cartcapacity) _____________________________________________________________ ELEMENT NAME: dump007 Element Type: Buffer Quantity: 1 Capacity: 65000 Input Option: Rear Output Option: First Search From: Front Actions Input: IF MOD (moddemand (6) + NPARTS (dump007),cartcapacity) = 1 CALL dumpcart001,get7,road7_t,0 VSEARCH road0_1,corppark,road1_2,road1_0,road2_3,road3_4,road4_5,road5_6,road6_5,road6_7,road7_t,roadt_7,road1_0,road3_6,road6_3,road7_0,road0_7,road2_1,get1,get2,get3,get4,get5,get6,get7 ENDIF moddemand (7) = MOD (moddemand (6) + NPARTS (dump007),cartcapacity) _____________________________________________________________ ELEMENT NAME: dump007a Element Type: Buffer Quantity: 1 Capacity: 65000 Input Option: Rear Output Option: First Search From: Front Actions Input: IF MOD (moddemand (6) + NPARTS (dump007a),cartcapacity) = 1 CALL dumpcart001,get7,road7_t,0 VSEARCH road0_1,corppark,road1_2,road1_0,road2_3,road3_4,road4_5,road5_6,road6_5,road6_7,road7_t,roadt_7,road1_0,road3_6,road6_3,road7_0,road0_7,road2_1,get1,get2,get3,get4,get5,get6,get7 ENDIF moddemand (7) = MOD (moddemand (6) + NPARTS (dump007a),cartcapacity) _____________________________________________________________ ELEMENT NAME: dump008 Element Type: Buffer Quantity: 1 Capacity: 65000 Input Option: Rear Output Option: First Search From: Front _____________________________________________________________ ELEMENT NAME: processmach Element Type: Machine Quantity: 1 Priority: Lowest Type: Assembly Assembly Qty: 5000 Cycle Time: Input / Output Rules Input: IF MOD (TIME,480) 400 AND MOD (TIME,480) 460 PULL from dump008 ELSE Wait ENDIF Output: PUSH to SHIP _____________________________________________________________ ELEMENT NAME: corppark Element Type: Track Quantity: 1 Capacity: 2 Zone: 0 Work Search None Input / Output Rules Output: PUSH to road0_1(1) _____________________________________________________________ ELEMENT NAME: get1 Element Type: Track Quantity: 1 Capacity: 1 Zone: 0 Work Se