物流運(yùn)作優(yōu)化-實(shí)驗(yàn)課-資料下載頁
2025-03-03 20:25本頁面
【正文】 sidered time period. 49 A Model of Twoechelon Distribution System Design Jjf o rztoS u b j e c tzcyfTCMi n i m i z eIiijIi JjijijIiii?????? ???? ??1These are the constraints, which assure that each customer is supplied via exactly one place from I. Customer j=2 z32?{0,1} 1 1 1 1 1 1 1 1 P1 P2 C1 C2 C3 C4 1 2 3 50 A Model of Twoechelon Distribution System Design JjIif o ryzJjf o rztoS u b j e c tzcyfTCMi n i m i zeiijIiijIi JjijijIiii????????? ???? ??,1These constraints ensure that customer j is allowed to be supplied via place i, only if a warehouse is located there, . yi=1. 51 A Model of Twoechelon Distribution System Design JjIif o rzIif o ryJjIif o ryzJjf o rztoS u b j e c tzcyfTCM i n i m i zeijiiijIiijIi JjijijIiii?????????????? ???? ??,}1,0{}1,0{,1Customer j=2 z32?{0,1} Producer P=s 1 1 1 1 1 1 1 1 P1 P2 C1 C2 C3 C4 y1?{0,1} 1 2 3 52 Let us demonstrate the model building on the toy example 1 J 1 2 3 4 fi I cij C1 C2 C3 C4 0 1 P 8 8 10 10 6 2 P1 5 5 7 7 6 3 P2 8 8 6 6 342414332313322212312111326710671085885866zzzzzzzzzzzzyyMi n????????????????53 Let us demonstrate the model building on the toy example 33411211134241433231332221231211134241433231332221231211132:1111.6710671085885866yzyzyzzzzzzzzzzzzzStzzzzzzzzzzzzyyM i n??????????????????????????????Customer j=2 z32?{0,1} Producer P=s 1 1 1 1 1 1 1 1 P1 P2 C1 C2 C3 C4 y1?{0,1} 1 2 3 1 54 Writing a model in Mosel Loops, sums data from file 4, . . ,1,3, . . ,1}1,0{3, . . ,1}1,0{4, . . ,1,3, . . ,14, . . ,1131314131?????????????? ???? ??jif o rzif o ryjif o ryzjf o rztoS u b j e c tzcyfT o t a l C o stMi n i m i z eijiiijiiji jijijiii練 習(xí)： 生產(chǎn)商 P只生產(chǎn)一種產(chǎn)品 ， 有四個客戶，每個客戶每天的需求量為一件。每個客戶只能由貨車送貨 上 門，每輛貨車運(yùn)載量為 1件。 每件貨物用貨車運(yùn)輸?shù)膯挝贿\(yùn)費(fèi)為 2 RMB。 有一條鐵路，從 P出發(fā)將經(jīng)過兩個離客戶比較近的地方 P1和P2， P1和 P2可以作為中轉(zhuǎn)站配送貨物。每個中轉(zhuǎn)站租金為 6 RMB每天。生廠商 P通過鐵路把貨物運(yùn)輸至中轉(zhuǎn)站的單位運(yùn)輸成本為 1RMB。 問題：請用 Xpress計(jì)算出最優(yōu)的物流配送方案。 Producer P Customers 1 1 1 1 1 1 1 1 P1 P2 declarations m, n: integer enddeclarations initializations from “” m n endinitializations 56 Writing a model in Mosel Declarations of variables using arrays loops declarations I = 1..m J = 1..n y : array (I) of mpvar z : array (I,J) of mpvar f : array (I) of integer c : array (I,J) of integer enddeclarations 57 Writing a model in Mosel Declarations of variables using arrays loops initializations from “” f c endinitializations Structure of the input file “”: m:[3] n:[4] f:[0,6,6] c:[8, 8,10,10, 5, 5, 7, 7, 8, 8, 6, 6] 58 Writing a model in Mosel Data input THANKS!
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