Results 41 to 50 of about 32,518 (302)
Arthritis Care &Research, EarlyView.Objective The aim of this study was to determine the differences in demographic, serologic, and clinical characteristics between male and female patients with systemic sclerosis (SSc) in an Australian cohort. Methods This was a retrospective observational study using data from the Australian Scleroderma Cohort Study.
Emily Lin +14 more
wiley +1 more source
Записки Горного института, 2020 The efficiency of sucker rod pump installations, which have become widespread in mechanized lift practice, is largely determined by the balance of the drive.
Kamil R. Urazakov +2 more
doaj +1 more source
Analysis and experimental study of oil well indicator diagram based on electric parameter method
Energy Reports, 2022 At present, the load diagram of pumping wells mostly uses load sensors to obtain load data. However, the load sensor is prone to mechanical fatigue during the measurement process, which results in measurement data drift distortion and large errors.
Xiaoju Yin +5 more
doaj +1 more source
Optimization Design of Pumping Unit Reversing Mechanism based on Output Swing Angle Analysis
Jixie chuandong, 2019 Aiming at the problem that the output angle of the elliptical gear planetary gear train reversing mechanism with small beam pumping unit is small and can not meet the long stroke demand, the influencing factors of the output swing angle of the mechanism ...
Liu Yongping Li Dawei Dong Changbin
doaj
Mechanical Analysis on the Transmission Mechanism of 35 Type Gear Long Ring Rack Pumping Units
Jixie chuandong, 2023 Taking a new type of 35 pumping unit suitable for deep well mining as the research object, the mechanical analysis of its gear long ring rack transmission mechanism is carried out to solve the problems of short operation cycle and high energy consumption
Peng Zhenhua +7 more
doaj
ENERGY EFFICIENCY OF A CENTER PIVOT IRRIGATION SYSTEM [PDF]
Engenharia Agrícola, 2018 This study aimed to evaluate the energy efficiency of a center pivot irrigation system operating in a terrain of variable topography. Values of Pumping Energy Efficiency (PEE), Supply Energy Efficiency (SEE), Global Energy Efficiency (GEE) and Specific ...
Brenon D. S. Barbosa +4 more
doaj +2 more sources
Vacuum tanker with remote pumping unit for emptying latrine
, 2019 Vacuum tanker with remote pumping unit for emptying ...
Rod Shaw (1258020) +2 more
core +1 more source
Planar Solid‐State Nanopores Toward Scalable Nanofluidic Integration Based on CMOS Technology
Advanced Engineering Materials, EarlyView.We present a scalable silicon‐based fabrication strategy for planar solid‐state nanopores to enable their integration with complex nanofluidic systems. Prototype devices demonstrate normal voltage‐current characteristics, good noise performance, and appreciable streaming currents. Our CMOS‐compatible fabrication process offers precise geometric control
Ngan Hoang Pham +7 more
wiley +1 more source
Design and Development of Multi-mode Control System for Beam Pumping Unit
Shiyou jixie, 2018 In order to deal with the complicated and variable working conditions in the production process of the pumping unit, a multi-mode control system of the beam pumping unit is designed.
Ren Xuhu +5 more
doaj
Vibration Characteristic of Multi-Stage Linear Motor Pumping Unit
, 2017 The vibration reason of the linear electric motor is analyzed for multi-stage linear pumping unit. A different order number expression of natural frequencies under wave action is given.
Yan Liu, Sen Wang, Yang Yang Zhao
core +1 more source