At present, a significant part of oil is extracted from difficult-to-develop reservoirs with low permeability. Hydraulic fracturing one the most important methods production stimulation. Scientific articles do not describe connections between flow-rate in well and change pressure hydraulic fracture or changing fracture, except some cases constant fluid-flow production. We obtained both exact an...

In a general DIARC framework [13], the emphasis is always on the guaranteed transient performance and accurate trajectory tracking in the presence of uncertain nonlinearity and parametric uncertainties along with accurate parameter estimation for secondary purpose such as system health monitoring and prognosis. Need for accurate parameter estimation calls for the use of Least Square Estimation ...

Abstract Thermal-hydraulic behaviors within a PWR fuel assembly is very complex under accident conditions and marine conditions, which has significant impact on reactor safety. It crucial to carry out studies thermal-hydraulic properties transient conditions. A telecentric lens pulse signal generator are applied improve the performance of PIV system, high temporal spatial resolution measurement...

The hydraulic conductance (k) of shoots and root systems was measured using the transient and the dynamic modes of the high pressure flowmeter (HPFM). Measurements were conducted on Quercus robur and Fagus sylvatica plants grown on different substrates (forest soil, sand, Terra-green and vermiculite) and harvested at different times of the year. The values of k obtained by the transient mode we...