نتایج جستجو برای: water distribution network

تعداد نتایج: 1731361  

Journal: :مهندسی برق و الکترونیک ایران 0
s. jadid o. homaee a. zakariazadeh

voltage control is one of the imperative issues in the smart distribution control system. while traditional distribution network is equipped with communication and monitoring equipment, the online voltage control can be perfectly achieved. with using these smart grid technologies, the distribution voltage control schemes should carry out intelligently and cover the undesirable effect of high pe...

Corrosion in general is a complex interaction between water and metal surfaces and materials in which the water is stored or transported. Water quality monitoring in terms of corrosion and scaling is crucial, and a key element of preventive maintenance, given the economic and health hurts caused by corrosion and scaling in water utilities. The aim of this study is to determine the best model fo...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1389

abstract: country’s fiber optic network, as one of the most important communication infrastructures, is of high importance; therefore, ensuring security of the network and its data is essential. no remarkable research has been done on assessing security of the country’s fiber optic network. besides, according to an official statistics released by ertebatat zirsakht company, unwanted disconnec...

Journal: :مرتع و آبخیزداری 0
علی فتح زاده استادیار دانشکدة کشاورزی و منابع طبیعی، دانشگاه اردکان، ایران سمیه ابدام کارشناس ارشد آبخیزداری، دانشکدة منابع طبیعی، دانشگاه یزد، ایران

[1] ‏ahmad, s. and simonovic, s.p. (2005). an artificial neural network model for generating hydrograph from hydrometeorological parameters, j. hydrol, 315, 236-251. [2] agarwal, a., mishra, s.k., ram, s. and singh, j.k. (2006). simulation of runoff and sediment yield using artificial neural networks, biosys. eng, 94(4), 597-613. [3] amini, m., abbaspour, k.c., khademi, h., fathianpour, n., afy...

2016
Do Guen Yoo Donghwi Jung Doosun Kang Joong Hoon Kim

We proposed an economic, cost-constrained optimal design of a water distribution system (WDS) that maximizes seismic reliability while satisfying pressure constraints. The model quantifies the seismic reliability of a WDS through a series of procedures: stochastic earthquake generation, seismic intensity attenuation, determination of the pipe failure status (normal, leakage, and breakage), pipe...

2016
Ahmed Kheiri Edward Keedwell Michael J. Gibson Dragan Savic

Hyper-heuristics operate at the level above traditional (meta-)heuristics that ‘optimise the optimiser’. These algorithms can combine low level heuristics to create bespoke algorithms for particular classes of problems. The low level heuristics can be mutation operators or hill climbing algorithms and can include industry expertise. This paper investigates the use of a new hyperheuristic based ...

Journal: :Mathematical and Computer Modelling 2008
Joaquín Izquierdo Idel Montalvo Rafael Pérez-García Manuel Herrera

Water distribution networks are not randomly constituted systems. On the contrary, their designs are closely related to their hydraulic performance. Recognizing the sundry and relative importance of the different pipes in a water distribution network may help in assessing their impact on the hydraulic performance of the network. This information, in turn, will be helpful in the different aspect...

Journal: :تحقیقات اقتصاد و توسعه کشاورزی ایران 0
مریم شریف زاده دانشکده کشاورزی دانشگاه شیراز، اقتصاد و توسعه کشاورزی علی اکبر کامکار حقیقی دانشکده کشاورزی دانشگاه شیراز، اقتصاد و توسعه کشاورزی مصطفی احمدوند دانشگاه یاسوج، اقتصاد و توسعه کشاورزی آرتمیس رودری دانشکده کشاورزی دانشگاه شیراز، مهندسی آب زینب امیری دانشکده کشاورزی دانشگاه شیراز، مهندسی آب

this research, applied as a survey approach aimed at investigating farmers’ tendency and attitudes toward agricultural water management styles (wmss). therefore, using cochran’s formula and simple random sampling, 244 farmers were selected in doroudzan region, iran. the data were acquired by face-to-face structural interviews and as well through a questionnaire that consisted of closed and open...

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