Urban Water Supply Pipe Network Renovation And Expansion To Optimize The Method

Further study has been conducted aiming at the problem in ti1e rebuilding andextending COnStrUCtion of city water sUPPly networks faced by cOmPm1ies. Fbody fOur kinds offorecasting models which Pndchng water dernan in the lindting futUre are presental f cellexPOnential regression method. incomplete dispatch distinguish method. linear gray prediedonmeil1ed i.e., GM(1 .l ) and nonlinear gn pedction method. i.e.. GM(l.l, @ o ), mp whichGM(l,l. ? o ) has the advantage of overcoming the limitation of linear tren li1 city water demandand the variety of calculate value of 1ongtfor fOrecasting. Based on it, nonlincar chan8e insinlulating value is Ptheented and higher simulating Prpeision as well as bethe prediction effeCt canbe attained. The fOllowing mathcmatic mthels abou! OPtdrihatiOn of rebuifding and exedngconsmictbo involve four Patts, i.e., the arran8ement of rebuilding, the piPe-diameter of rebnildingand exboing wat6r resources and mpp stations. The fOrmer two PartS are the most difficultqaretions a1l along which can be resolved by adopting a anaiytic method named as SimulatalAnnealtw's BoltZmann. TherfOre. the piPe-dhaneter sold in the market and the more preferablerebuilding rrgeInen are attained direCtly The latter tWO PartS can be settled by the adoPion ofthe genendind contractal 8rads method which bo on inferior demand for iintial vaius andobvious effect of optdrihation. n1e oPtimization of the whole networks of rebni1ding and extendingconforhon is colnpleted by iIltrDducing the method of decomposing and coordnaton of systemellgmeering.