In a hydroelectric power plant or in a pumping station in order to avoid sudden large increase of pressure due to instantaneous valve closure sometimes a surge tank is installed. The height of surge tank is designed by the highest possible water level during the operation. The theoretical treatment of oscillation in a surge tank is difficult because of the non-linearity of friction term in the ...

With the development of times and promotion technology, people’s living standards aesthetic requirements have also been continuously improved. Intelligent design enables jewelry to break through its position in traditional sense It is no longer limited handmade production precious metals. can be applied design. The unlimited choice materials allows designers greater space imagination. fashion t...

In product design many fields overlap, starting from design  ?ending with marketing, so the designer must be aware of needs and desires consumer market in order for him to able, through his design, meet satisfy them, Despite utmost importance research related process, companies benefit as a tool marketing development is very limited. Objectives: Access most efficient methods preparing achieve c...

Time series techniques are applied to Ghara-Aghaj flow records, in order to generate forecast values of the mean monthly river flows. The study of data and its correlogram shows the effect of seasonality and provide no evidence of trend. The autoregressive models of order one and two (AR1, AR2), moving average model of order one and ARMA (1,1) model are fitted to the stationary series, where th...