this paper explores the capabilities of multi-objective particle swarm optimization algorithmin a simulation-optimization model for solving waste load allocation problems. the main goals are totaltreatment costs, violation of the water quality standards and equity. in this research, the water qualitysimulation model is coupled with a multi-objective optimization model, mopso. in order to derive...

background hepatitis b infection is still the main cause of chronic liver disease in iran, which is associated with significant economic and social costs. objectives this study aimed to estimate the financial burden caused by chb infection and its complications in iran. results the total annual cost for the activate population of chb patients and for those receiving treatment at various disease...

The goal of the present study was quality evaluation of the natural waters in Stara Zagora Region according to two parameters: total iron and zinc. With regard to the investigations conducted during October-December, 2009: the surface waters of Stara Zagora Region, towards the measured zinc and iron concentrations, could be classified as I category; the groundwaters of Stara Zagora Region, towa...

In this work, a green, simple and highly efficient procedure for the synthesis of bis(indolyl)methanes is described. The condensation of indoles with carbonyl compounds catalyzed by citric acid in water affords bis(indolyl)methanes in high yields and relatively short reaction times. The advantages of this method are using of water as a low cost solvent and efficient recyclability of the catalyst.

this paper presents a simplifiedlagrangian multiplier based algorithm to solve the fixed head hydrothermalscheduling problem. in fixed head hydrothermal scheduling problem, waterdischarge rate is modeled as quadratic function of hydropower generation andfuel cost is modeled as quadratic function of thermal power generation. thepower output of each hydro unit varies with the rate of water discha...

the serious obstacles to improve water supply, has caused world debates, seeking some solutions to tackle the problem of shortages in water supply. t. therefore, programs and policies have focused mainly on appropriate pricing approachof. since the water industry in iran has been monopolized by the government, an effective pricing approach is assumed to maximize the social welfare with consider...

background: burn injuries are a major public health in the world, especially in developing countries. the aim of this study was investigate to the epidemiological data and cost of hospitalization due to burn in pediatrics in kermanshah provinces from 2011 to 2013.material and methods: this was a retrospective cross sectional study. the study subject was all of patient lee than 15 years who admi...

OBJECTIVE To evaluate and quantify the economic benefits attributable to improvements in water supply and sanitation in rural India. METHODS We combined propensity-score "pre-matching" and rich pre-post panel data on 9500 households in 242 villages located in four geographically different districts to estimate the economic benefits of a large-scale community demand-driven water supply program...

This study evaluated whether occurrence of acute gastrointestinal illnesses declined after filtration and ozonation were added to a previously unfiltered, chlorinated high-quality surface water source in a northwest United States city. Enteric and other illnesses were recorded for two 6-month periods for control and intervention sites in the same city. During phase 1, chlorinated, unfiltered dr...