【正文】 i f is the fix fees for the operating of distribution center “i”, ij t is the transportation time between factory “i” and distribution center “j”, jk T is the transportation time between distribution center “j” user “k”, k f is the limitation of distribution time by user “k”, j a is the demand of user “j”, i b is the capacity of the distribution center “i”, k c is the supply amount of factory “k”, m is the num of candidate distribution center, n is the num of users, p is the largest num of distribution center which can be chose, l is the num of factory. Constraints condition (1—2) shows that the distribution center can meet the users’ need, Constraints condition (1—3) shows that the purchase should be less than the capacity of the distribution center “i”, Constraints condition (1—4) shows that the num of distribution center we choose should be less than “p”, Constraints condition (1—5) shows that the purchase of the distribution center equal to the sell , Constraints condition (1—6) shows that the modity factory send to the distribution center should be in the product ability, Constraints condition (1—7) shows that the transportation time summation from factory to distribution center and from distribution center to factory should be no more than the time limitation of the distribution by the users. 5. CONCLUSION Under the ECommerce environment, choosing the reasonable distribution center location is prerequisite of constructing high efficient Distribution system, reducing the cost of distribution, improving the rate of delivering goods and ensuring the quality of service. This text does not only analyze the features and the Influencing factors of the logistics distribution center locationselection under Emerce environment, but also make more analysis on the traditional locationselection model of logistics distribution center, point out the existing problems in it, amend the model appropriately according to the actual situation, and thereby construct the distribution model adjusting to the development of Emerce to adapt the reality of 7 Emerce, and relieve the bottleneck of logistics. 8 電子商務(wù)環(huán)境下的物流配送中心選址模型的構(gòu)建 摘要： 盡管 物流配送中心 在電子商務(wù)環(huán)境下得到 增長，傳統(tǒng)的物流配送中心 也 發(fā)展和成熟。 電子商務(wù)環(huán)境下物流配送中心 的 功能環(huán)境 ，這 是 影響位置選擇 的 主要因素 電子商務(wù)環(huán)境下物流配送中心的功能 在 21 世紀(jì) ， 隨著互聯(lián)網(wǎng)和現(xiàn)代信息技術(shù)的發(fā)展，電子商務(wù)逐漸成為最具競爭力的商業(yè)模式， 與 傳統(tǒng)的商業(yè)模式經(jīng)營的概念和模式明顯不同， 所以 物流配送中心 在一些方面 不同于傳統(tǒng)模式 的。數(shù)學(xué)模型是： 1111nnj j j j jjjnnj j j j jjjx c w x c wy c w y c w?????????? 混合的整數(shù)規(guī)劃將選出網(wǎng)絡(luò)節(jié)點(diǎn)的方法 針對 社會經(jīng)濟(jì)效益安排物流網(wǎng)絡(luò)節(jié)點(diǎn)認(rèn)為的情況 在 材料需求的 運(yùn)輸條件下， 以 一種系統(tǒng)性的方法與 全面 自然環(huán)境、 設(shè)計研究的數(shù)量、 位置、 大小、 供水區(qū)的物流網(wǎng)絡(luò)節(jié)點(diǎn)建立高效率物流網(wǎng)絡(luò)系統(tǒng)。 在電子商務(wù)環(huán)境下，選擇合理的配送中心選址是建設(shè)高效率的分配制度，降低流通成本，提高運(yùn)送貨物，并確保服務(wù)質(zhì)量的速度 的前提 。 然后，對商品的需求和流動情況形成網(wǎng)絡(luò) ， 整個物流網(wǎng)絡(luò)體系結(jié)構(gòu)模型如下： 111 1 1 1 1 1 1m n m m mi j i j i i k i k i i k ii j i k i k iM in Z c x f y h w u w? ? ? ? ? ? ?? ? ? ?? ? ? ? ? ? ? Constraint equation is: 1mij jiXa??? j=1,2,……… n(12) 11ki i ikw b y??? i=1,2,…… ..m(13) 1miiyp??? (14) 111nij kijkxw????? i=1,2