through a collection of cooperative agents called ants, the near optimal solution to the multi-reservoir operation problem may be effectively achieved employing ant colony optimization algorithms (acoas). the problem is approached by considering a finite operating horizon, classifying the possible releases from the reservoir(s) into pre-determined intervals, and projecting the problem on a grap...

Radiol Bras. 2015 Nov/Dez;48(6):399–403 401 http://dx.doi.org/10.1590/0100-3984.2015.0119 ing from sequelae, generally associated with tuberculosis. The occurrence of lung cancer in cavities mimicking fungus ball or air crescent sign is quite rare. The tumor tends to infiltrate in the adjacent pulmonary parenchyma causing a paracicatricial effect, and may lead to emphysematous or cystic changes...

one of the most important methods to investigate heavy metals as pollutants is more likely to use bio-monitors which can be applied as an appropriate index to express the quality of environment. in current study, in order to investigate the effects of dominant plants in the desired region and role of aquatic macrophytes in monitoring such elements as zinc (zn), lead (pb), copper (cu) and cadmiu...

Today, variable flow pattern, which uses static rule curves, is considered one of the challenges reservoir operation. One way to overcome this problem develop forecast-based curves. However, managers must have an estimate influence forecast accuracy on operation performance due intrinsic limitations models. This study attempts a model and investigate effects corresponding two conventional To mo...

this study aims to measure the amount of heavy metal lead in the effluent haft tapeh and compare it with dez river in winter 2010 and spring 2011. first nine water samples using a rope marked at the desired depth within the sampling depth of effluent technology cultured in three stations in haft tapaeh. hence measuring the concentration of heavy elements using graphite furnace method and atomic...

the purpose of this study was to compare the dez river water quality in the dezful hydrometric station for human drinking water, industry and agriculture. this study by cross-sectional method used data from the period of 39 years. sampling was carried out on the basis of physical and chemical parameters were determined. the results with world health organization standards, charts schuler and ag...

The environmental requirement of the river is the amount of water to maintain natural ecological conditions and health of quality of the river water. In this study, to estimate the environmental water requirement of Karoun River, Dez, Great Karoun and Beheshtabad sub-basin (upper Karoun) using hydrological Montana method and offers based on frequency analysis of hydrological flow normally and u...

Resumo: Neste artigo investiga-se urn novo sistema de multiplo acesso para comunica~Oes sem fio de banda larga em interiores utilizando antenas setorizadas. 0 que 0 difere de outros sistemas previamente propostos, que tambem utilizam antenas setorizadas, e a sua capacidade de reusar frequencias em setores distintos da microcelula : terminais portateis 10­ calizados em setores distintos da micro...