Results 231 to 240 of about 836,844 (304)

Comparative Numerical Studies for the Flow Energy Dissipation Features in a Vertical Two‐Stage Centrifugal Pump in Pump and Turbine Conditions

open access: yesEnergy Science &Engineering, EarlyView.
Based on entropy theory, this study presents a comparative numerical analysis of the flow energy dissipation (FED) in a VTSP under two distinct operating conditions: pump condition and turbine condition, both characterized by relatively high hydraulic efficiencies of 88.9% and 87.4%, respectively. In pump condition, the highest FED production occurs in
S. Liu   +5 more
wiley   +1 more source

Program orientasi Kosass [PDF]

open access: yes, 2017
Harian Metro,
core  

Research on the Mechanism of Sand Bridge Stuck Drill in Deep Coal and Rock Gas Horizontal Wells

open access: yesEnergy Science &Engineering, EarlyView.
Accounting for wellbore collapse debris and the bulldozer effect, this study develops models for permeable and impermeable sand bridge sticking in deep CBM horizontal wells, deriving resistance and volume formulations. Validated in Changqing, results show impermeable bridges dominate; controls (fluid optimization, staged drilling, circulation, speed ...
Cheng Hui   +7 more
wiley   +1 more source

Nationwide patterns of cardiac-related mortality in amyloidosis cases: an epidemiologic study. [PDF]

open access: yesBMC Cardiovasc Disord
Shubietah A   +14 more
europepmc   +1 more source

Analysis of the Algorithm Monitoring the Geometric Parameters of the Powered Support Based on Station Tests

open access: yesEnergy Science &Engineering, EarlyView.
ABSTRACT The powered roof supports in the longwall complex are placed and interconnected next to one another, typically about 125–250 units in a longwall face. It is an essential component in the longwall complex, which also includes a shearer (or plow) and an armored face conveyor.
Dawid Szurgacz   +3 more
wiley   +1 more source

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