Results 31 to 40 of about 4,889,516 (137)

Common mode voltage impact on wind turbine main shaft bearing

open access: yes, 2021
Main shaft bearing is a critical component in the wind turbine rotating system. But the bearing voltage, which is generated by the potential differences between the bearing and the main shaft, often causes the downtime of the main shaft bearing.
Carlson, Ola, Zhao, Jian, Xu, Xiangdong
core  

RESULTS OF EXPERIMENTAL RESEARCH OF THE REINFORCED CONCRETE SHELL-SLAB

open access: yesВестник СибАДИ, 2019
Introducton. The paper demonstrates the results of experimental research of the reinforced concrete shell-slab under the action of vertical uniformly distributed load.
A. V. Selivano, F. F. Reger
doaj   +1 more source

Linearity Enhancement in Magnetostrictive Sensors Based on Substructure with Tunable Poisson’s Ratio

open access: yesSensors
Magnetostrictive sensors based on the inverse magnetostrictive effect offer the advantages of wireless passive operation and structural simplicity; however, achieving both high sensitivity and superior linearity remains a persistent challenge. This study
Shuairan Xu   +3 more
doaj   +1 more source

Improved dc voltage multiplier [PDF]

open access: yes, 1968
Circuit multiplies a dc input voltage in the millivolt range to yield a larger dc output voltage bearing a fixed ratio to the input voltage. The supply voltage need not be precisely regulated, the potentiometer need not be linear, and the gain of servo ...
Savelle, C. R., Jr.
core  

Analysis of adiponectin:leptin ratio in non-tumor-bearing and tumor-bearing EE and SE mice.

open access: yes, 2012
Adiponectin:leptin ratio is significantly increased in non-tumor-bearing and tumor-bearing EE mice compared to SE mice.
Nicolas Goncalves-Mendes (111712)   +9 more
core   +1 more source

Effects of Nominal Duty Cycle and Delayed Energization on the Reciprocating Friction and Wear Performance of GCr15 Bearing Steel

open access: yesLubricants
Under intermittent source-side excitation, electric-drive systems can maintain mechanical operation, so nominal energization parameters do not directly represent the interfacial electrical state. GCr15 ball-on-disk tests compared dry and polyalphaolefin (
Weihao Liu   +8 more
doaj   +1 more source

Time-Domain Sparsity-Based Bearing Fault Diagnosis Methods Using Pulse Signal-to-Noise Ratio [PDF]

open access: yes
A fast and automated technique is crucial for bearing faults diagnosis during operation. To circumvent the intricacies of signal spectrum analysis, a diagnostic method named the pulse signal-to-noise ratio (PSNR) test is proposed by exploiting the time ...
Wei, Shaoming   +6 more
core   +1 more source

Chloride Resistance of Assembled Bridge Piers Reinforced with Epoxy-Coated Steel Bars

open access: yesApplied Sciences
To reveal the influence of joint type and epoxy-coated steel bar surface damage on the durability of assembled bridge piers, this study simulated the potential damage to epoxy-coated steel bars at various stages of an actual construction process by ...
Dazhang Fan   +3 more
doaj   +1 more source

Wind Turbine Generator Reliability: An Exploration of the Root Causes of Generator Bearing Failures [PDF]

open access: yes, 2013
Increasing the availability of multi-megawatt wind turbines (WT) is necessary if the cost of energy generated by wind is to be reduced. Reliability surveys have shown that WT generator bearings have a relatively high failure rate, with failures happening
WHITTLE, MATTHEW
core  

Voltage-Gated Ion Transport in Two-Dimensional Sub‑1 nm Nanofluidic Channels

open access: yes, 2019
Voltage-gated nanofluidic systems have shown a wide range of potential applications in biosensors, energy harvest, and separation. Two-dimensional (2D) nanofluidic membranes fabricated with electrically conductive nanosheets have high ion conductivity ...
George P. Simon (1430725)   +5 more
core   +1 more source

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