Results 1 to 10 of about 191,052 (266)

A Novel Rolling Bearing Defect Detection Method Based on Bispectrum Analysis and Cloud Model-Improved EEMD

open access: yesIEEE Access, 2020
Mechanical signals are not only disturbed by Gaussian noise, but also by non-Gaussian noise. These Gaussian noise and non-Gaussian noise have gravely impeded detecting of rolling bearing defects using traditional methods.
Yonghua Jiang   +5 more
doaj   +1 more source

Thermally controlled large deformation in temperature-sensitive hydrogels bilayers

open access: yesInternational Journal of Smart and Nano Materials, 2021
The present work investigates the thermally controlled deformation characteristics in temperature-sensitive hydrogels bilayers. The free energy density for temperature-sensitive hydrogels is modified, upon which the finite element model is developed and ...
Jianying Hu, Nan Jiang, Jianke Du
doaj   +1 more source

Bandgap tunability of surface acoustic waves in a two-dimensional magneto-electro-elastic phononic crystal

open access: yesAIP Advances, 2021
The propagation of surface acoustic waves in two types of tunable magneto-electro-elastic phononic crystal structures is investigated, for which Terfenol-D rods are vertically deposited on the piezoelectric substrate or embedded in the piezoelectric ...
Jianying Hu   +4 more
doaj   +1 more source

3D printing path planning algorithm for thin walled and complex devices

open access: yesScience and Engineering of Composite Materials, 2021
With the popularity of stereo printing technology, 3D printers are widely used in industry, manufacturing, medicine, and other industries to quickly manufacture small devices. Before 3D printing, it is necessary to plan the printing path.
Yang Min, Lai Menggang, Liu Shengjun
doaj   +1 more source

Quantitative Evaluation of Burn Injuries Based on Electrical Impedance Spectroscopy of Blood with a Seven-Parameter Equivalent Circuit

open access: yesSensors, 2021
A quantitative and rapid burn injury detection method has been proposed based on the electrical impedance spectroscopy (EIS) of blood with a seven-parameter equivalent circuit.
Huilu Bao   +7 more
doaj   +1 more source

Design and Experimental Verification on Characteristics of Valve-Less Piezoelectric Pump Effected by Valve Hole Spacing

open access: yesIEEE Access, 2019
Valve-less piezoelectric pumps possess the advantages of simple structure and absence of electromagnetic interference, which has accordingly drawn widespread attention. In this paper, in order to improve the performance of valve-less piezoelectric pumps,
Jiajian Ji   +6 more
doaj   +1 more source

A rotational energy harvester utilizing an asymmetrically deformed piezoelectric transducer subjected only to unidirectional compressive stress

open access: yesEnergy Reports, 2023
Energy harvesting using piezoelectric transduction offers a promising alternative to the conversion of kinetic energy like ambient vibration and rotational motion into useful electricity in self-powered electronic devices.
Zhonghua Zhang   +6 more
doaj   +1 more source

Performance Dependence on Initial Free-End Levitation of a Magnetically Levitated Piezoelectric Vibration Energy Harvester With a Composite Cantilever Beam

open access: yesIEEE Access, 2017
Vibration energy harvesting by using piezoelectric materials provides a promising alternative solution for a wide range of self-powered systems. In this paper, performance dependence on initial freeend levitation position (IFLP) of a magnetically ...
Zhonghua Zhang   +5 more
doaj   +1 more source

A Dual-Chamber Serial–Parallel Piezoelectric Pump with an Integrated Sensor for Flow Rate Measurement

open access: yesSensors, 2019
A new concept of a dual-chamber serial-parallel piezoelectric pump with an integrated sensor (DSPPIS) is presented in this paper. By means of dividing a piezoelectric bimorph into an actuator and a sensor, sensing function is integrated onto the DSPPIS ...
Song Chen   +6 more
doaj   +1 more source

3D-Printed Soft Structure of Polyurethane and Magnetorheological Fluid: A Proof-of-Concept Investigation of its Stiffness Tunability

open access: yesMicromachines, 2019
In this study, a soft structure with its stiffness tunable by an external field is proposed. The proposed soft beam structure consists of a skin structure with channels filled with a magnetorheological fluid (MRF). Two specimens of the soft structure are
Seong-Woo Hong   +7 more
doaj   +1 more source

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