Nowadays, hydropower plays an essential role in the energy market. Due to their fast response and regulation capacity, hydraulic turbines operate at off-design conditions with a high number of starts and stops. In this situation, dynamic loads and stresses over the structure are high, registering some failures over time, especially in the runner. Therefore, it is important to know the dynamic r...

background: based on classical two-cell, two-gonadotropin theory, in the follicle, follicle-stimulating hormone (fsh) and luteinizing hormone (lh) put on their main effects on the granulosa and theca cells. lh is essential for androgens production. androgens are used for estradiol production by granulosa cells. profound suppression of lh concentrations in some normogonadotropic patients can cau...

The new international outlook for the gas sector suggests evaluating exploitable reserves in previously unconsidered areas including hydraulic fracturing technology. In order to estimate amount of Jaca Flysch formation, analysis geological and geophysical logs volumetric method have been used. It has taking into account part formation likely contain gas, porosity (2.65%) calculated from sonic w...

The combination of seismic analysis with advanced physics-based simulation provides an opportunity to further understand injection-induced fault reactivation, including the hydro-mechanical interplay between different faults and rock where they reside. Here, this is investigated based on data from hydraulic stimulation a well at Reykjanes geothermal field. Central development interdisciplinary ...

background and aim: tinnitus is an auditory phantom percept in the absence of any objective physical sound source. although advances have been made in its treatment, there is very low percent of patients that report an elimination of their tinnitus. a novel approach using noninv­asive neuromodulation has emerged as an inter­esting and promising modality for tinnitus relief. our aim in this revi...

ISO DWG hydraulic pneumatic symbols Jacking Gears supplier from china Various types Good qualityDesign, supply and tech support of hydraulic compact mini power packsHydraulic Fluid. Hydraulic system liquids are used primarily to transmit and distribute forces to various units to be actuated. Liquids are able to do this because. Milwaukee Cylinder offers additional products to help complete your...

The present hydraulic variable-pitch mechanism of wind turbine uses three hydraulic cylinders to drive three crank and connecting rod mechanisms respectively; the blades are moved with the cranks. The hydraulic variable-pitch mechanism has complex structure, occupies a lot of space and its maintenance is trouble. In order to make up for the shortcomings of hydraulic cylinder variable-pitch syst...

Hydraulic fracturing is necessary to stimulate deep geothermal reservoirs. Compared with traditional hydraulic (THF), cyclic (CHF) decreases the breakdown pressure (BP), generates a more complex crack network and reduces induced seismicity; thus, it has attracted increasing attention. In this work, state-of-the-art studies on CHF are comprehensively reviewed for first time. Six loading schemes ...

Tractor hydraulic power is used on a wide range of agricultural implements; however, the availability of operational hydraulic data at points other than full engine throttle position is limited. Operators could utilize this hydraulic data to maximize field efficiency and minimize machinery costs when determining suitable machinery for field operations. A field usable hydraulic test apparatus ca...