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Register a new userUsing linear programming to manage and design drinking water net
استخدام البرمجة الخطية لإدارة و تصميم شبكات مياه الشرب
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Authors
علي عوض الدياب( باحث )
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يقدم هذا البحث نموذجا رياضيا و برنامجا حاسوبيا لاستخدام البرمجة الخطية في البحث عن الحل الأمثل لشبكات مياه الشرب الحديثة، و في تحديد الحل الأقل كلفة في حالة تعديل شبكة موجودة.
In this research, we present, a linear programming using model. This model can define the optimal proposal ( with minimum cost and high efficiency ) in both cases : new net design or exist net modification.
References used
Hand book on modeling for discrete optimization: G.Appa, L.Pitsoulis, H.P.Williams- Ed. Springer New York 2006
Handbook of Met heuristics: F.Glover, G.AKochenberger kluwer Academic Publishers – London 2003
Introduction to operation research: F.S. Hillier, G.J.Lieberman – Ed: McGraw – Hill – England 2001
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This work deals with a new method for solving Integer Linear Programming Problems depending on a previous methods for solving these problems, such that Branch and Bound method and Cutting Planes method where this new method is a combination between t
hem and we called it Cut and Branch method. The reasons which led to this combination between Cutting Planes method and Branch and Bound method are to defeat from the drawbacks of both methods and especially the big number of iterations and the long time for the solving and getting of a results between the results of these methods where the Cut and Branch method took the good properties from the both methods. And this work deals with solving a one problem of Integer Linear Programming Problems by Branch and Bound method and Cutting Planes method and the new method, and we made a programs on the computer for solving ten problems of Integer Linear Programming Problems by these methods then we got a good results and by that, the new method (Cut and Branch) became a good method for solving Integer Linear Programming Problems. The combination method which we doing in this research opened a big and wide field in solving Integer Linear Programming Problems and finding the best solutions for them where we did the combination method again between the new method (Cut and Branch) and the Cutting Planes method then we got a new method with a very good results and solutions.
Water sources in Syrian coastal area have a great importance due to the variety of the
sources and the urgent needs to water for drinking and irrigation. Therefore great efforts
are made to protect water sources from contaminants. This research aim
ed to study some
contaminant indicators in some drinking water sources in the Syrian coastal area. The
study included determining the concentrations of nitrates, nitrites and some heavy metals
including lead, cadmium and zinc in water samples taken from five sources of water
distributed from north Lattakia to north Tartous. The results showed that the concentrations
of nitrate, nitrite and heavy metals differ depending on the water source. However, all
these concentrations were lower and within the acceptable limits of Syrian standard for
drinking water. The study concluded that water resources in the coastal area are
distinguished with their relative purity and contaminants little reach.
This research discusses the problem of drinking water shortage and
distribution instability in Salamyeh city due to the current crisis.
Salamyeh city dependents on Orontes River as a source for drinking
water through Hama water supply facility, wh
ich sufferes repeated
sabbotage attacks. As a result, an emergency measure was implemented
by depending on local water sources within the city, which are deep wells
that produce water of sulphuric nature.Three desalination plants were
provided to treat local sulphuric water producing suitable safe water, but
these plants production is way less than the city needs.
Fluoride ion is present in high concentration in some regions in Syria. As
fluoride occurs naturally in water, We have studied some methods of fluoride
removal such as Nalgonda technique and activated carbon method.
In Nalgonda technique we add Al
um and lime to the water, and we have
found that fluoride removal efficiency remains constant when the initial
concentrations of fluoride changes, or when the chloride ions exists in water,
but it depends on pH, and get better when the method is investigated in two
steps. In addition, adsorption of fluoride decreases with increasing
sedimentation time, or using Ventilated lime or CaCO3 instead of Ca (OH)2.
In activated carbon method we have done different experiments by using
charcoal of coconut coir, date seeds and olive seeds. And we have found that
olive seeds carbon is better than others, and its fluoride removal efficiency
increases after impregnation with solution of 2% Al2(SO4)3.
In this paper we offer a new interactive method for solving Multiobjective linear
programming problems. This method depends on forming the model for reducing the
relative deviations of objective functions from their ideal standard, and dealing with
the
unsatisfying deviations of objective functions by reacting with decision maker.
The results obtained from using this method were compared with many interactive
methods as (STEM Method[6] – Improvement STEM Method[7] – Matejas-peric
Method[8]). Numerical results indicate that the efficiency of purposed method comparing
with the obtained results by using that methods at initial solution point and the other
interactive points with decision maker.
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