Results 1 to 10 of about 44,850 (204)

The Rocketdyne Multifunction Tester. Part 1: Test Method [PDF]

open access: yes, 1991
The Rocketdyne Multifunction Tester is a general purpose test apparatus which utilizes axial and radial magnetic bearings as shaft excitation devices. The tester is modular in design so that different seal and bearing packages can be tested on the same ...
Murphy, Brian T.   +2 more
core   +1 more source

Impedance of rigid bodies in one-dimensional elastic collisions

open access: yes, 2012
In this work we study the problem of one-dimensional elastic collisions of billiard balls, considered as rigid bodies, in a framework very different from the classical one presented in text books. Implementing the notion of impedance matching as a way to
de Oliveira, Bruna P. W.   +2 more
core   +1 more source

Application of Impulse Response Characteristics in Rail-ground Transition Resistance Measurement

open access: yesChengshi guidao jiaotong yanjiu
Objective The stray current harm in urban rail transit lines is increasingly non-ignorable. Stray current is not easy to be detected, and the amount of the rail-ground transition resistance is a crucial factor affecting stray current.
CAO Xiaobin   +5 more
doaj   +1 more source

Sparse signal recovery based on adaptive algorithms for debris detector

open access: yesAIP Advances, 2021
Inductive debris sensors are generally used in online debris detection and perform well in monitoring the wear condition of rotating facilities. The detection accuracy is restricted by the superposition and noise of the impedance signal.
Bingsen Xue   +5 more
doaj   +1 more source

Respiratory system impedance in different decubitus evaluated by impulse oscillometry in individuals with obesity.

open access: yesPLoS ONE, 2023
Background and objectiveThe body posture can influence gas exchange, respiratory mechanics, and mucociliary clearance and different positions can be used as a therapeutic strategy to improve in gas exchange and can also help physiotherapists to assist ...
Mayara Holtz   +5 more
doaj   +1 more source

Performance Analysis of Discrete Wavelet Multitone Transceiver for Narrowband PLC in Smart Grid [PDF]

open access: yes, 2012
Smart Grid is an abstract idea, which involves the utilization of powerlines for sensing, measurement, control and communication for efficient utilization and distribution of energy, as well as automation of meter reading, load management and capillary ...
Baig, Sobia, Yazdani, Javad
core   +1 more source

Experimental Investigation on Cumulative Effects of Transformer Winding Deformation Under Short‐Circuit Impulses

open access: yesIET Electric Power Applications
Power transformer windings are susceptible to deformation after multiple short‐circuit impulses, threatening power grid stability. Currently, there is a lack of experimental data on various characteristic parameters of failures after multiple short ...
Jun Liu   +6 more
doaj   +1 more source

Feasibility of Imaging Tissue Electrical Conductivity by Switching Field Gradients with MRI. [PDF]

open access: yes, 2015
Tissue conductivity is a biophysical marker of tissue structure and physiology. Present methods of measuring tissue conductivity are limited. Electrical impedance tomography, and magnetic resonance electrical impedance tomography rely on passing external
Gibbs, Eric, Liu, Chunlei
core   +2 more sources

On the construction of a digital transfer function from its real part on unit circle [PDF]

open access: yes, 1982
It is shown in this correspondence that the system function H(z) of a linear time invariant (LTI) causal digital filter with real impulse response coefficients can be obtained from the real part of its frequency response HR(ejω) given in the form of a ...
Mitra, S. K., Vaidyanathan, P. P.
core   +1 more source

Complex Impedance as a Diagnostic Tool for Characterizing Thermal Detectors

open access: yes, 2004
The complex ac impedance of a bolometer or microcalorimeter detector is easily measured and can be used to determine thermal time constants, thermal resistances, heat capacities, and sensitivities.
Vaillancourt, John E.
core   +1 more source

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