Results 21 to 30 of about 149,234 (263)

Shape distortion in sintering results from nonhomogeneous temperature activating a long-range mass transport

open access: yesNature Communications, 2023
Sintering theory predicts no long-range mass transport or distortion for uniformly heated particles during particle coalescence. However, in sintering-based manufacturing processes, permanent part distortion is often observed.
Sandra M. Ritchie   +6 more
doaj   +1 more source

Comparative Measurements on Loudspeaker Distortion: Current vs. Voltage Control

open access: yesArchives of Acoustics, 2017
Modulation and harmonic distortion produced by ordinary moving-coil direct-radiator drive units are measured under current control and voltage control.
Esa MERILÄINEN
doaj   +1 more source

Analysis of Current Distortion of Three-Phase Voltage Source Rectifiers and its Application in Fault Diagnosis

open access: yesIEEE Access, 2020
The open-switch fault of three-phase voltage source rectifiers (VSR) may lead to ac current distortion. In the past decade, some current-based fault diagnosis methods have been proposed, which directly used the phenomenon of current distortion but lacked
Chunsong Sui, Yigang He, Mingyun Chen
doaj   +1 more source

On the Inherent Instability of Biocognition: Toward New Probability Models and Statistical Tools

open access: yesEntropy, 2022
A central conundrum enshrouds biocognition: almost all such phenomena are inherently unstable and must be constantly controlled by external regulatory machinery to ensure proper function, in much the same sense that blood pressure and the ‘stream of ...
Rodrick Wallace   +2 more
doaj   +1 more source

Instrumental distortions in quantum optimal control [PDF]

open access: yesThe Journal of Chemical Physics
Quantum optimal control methods, such as gradient ascent pulse engineering (GRAPE), are used for precise manipulation of quantum states. Many of those methods were pioneered in magnetic resonance spectroscopy, where instrumental distortions are often negligible. However, that is not the case elsewhere: the usual jumble of cables, resonators, modulators,
Uluk Rasulov, Ilya Kuprov
openaire   +3 more sources

The Effect of Systematic Corrective Exercises on the Ankle Proprioception in People with Functional Pronation Distortion Syndrome: A Randomized Controlled Clinical Trial Study

open access: yesمجله پژوهش در علوم توانبخشی, 2020
Introduction: Pronation distortion syndrome is one of the most common abnormalities in the lower extremity that causes distortions in the structures of the skeletal parts of the foot.
Ali Golchini, Nader Rahnama
doaj   +1 more source

Comparing the Effectiveness of Acceptance and Commitment Therapy and Schema Therapy on Psychological Well-being and Cognitive Distortion of Single Women with Love Trauma Syndrome [PDF]

open access: yesWomen’s Health Bulletin, 2023
Background: The stability and quality of emotional relationships can directly and indirectly affect the mental and physical health of women. This survey was designed to evaluate the effectiveness of Acceptance and Commitment Therapy (ACT) and Schema ...
Rohollah Sharifi Nejad Rodani   +2 more
doaj   +1 more source

Research on Distortion Control in Off-Axis Three-Mirror Astronomical Telescope Systems

open access: yesPhotonics
With off-axis reflection systems with specific distortion values serving as objectives or collimators, it is possible to compensate and correct for spectral line bending in spectroscopic instruments.
En Liu   +5 more
doaj   +1 more source

Improved Thrust Performance Optimization Method for UAVs Based on the Adaptive Margin Control Approach

open access: yesMathematics, 2023
This study proposes a strategy for improving the thrust performance of fixed-wing UAV turbine engines from the perspective of aircraft/engine integration.
Yeguang Wang, Honglin Liu, Kai Liu
doaj   +1 more source

Multidisciplinary Optimization of Aircraft Aerodynamics for Distributed Propulsion Configurations

open access: yesApplied Sciences
The combination of different aerodynamic configurations and propulsion systems, namely, aero-propulsion, affects flight performance differently. These effects are closely related to multidisciplinary collaborative aspects (aerodynamic configuration ...
Shaojun Luo   +5 more
doaj   +1 more source

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