energy harvestingfrequency up-conversionmicroelectromechanical systems (MEMS)wireless sensorsThis paper presents an electromagnetic (EM) vibration-to-electrical ... Kulah, H,Najafi, K - 《IEEE Sensors Journal》 被引量: 365发表: 2008年 Micromachined PZT cantilever based on SOI structure for low freque...
Piezoelectric nanofoams with the interlaced ultrathin graphene confining Zn-N-C dipoles for efficient piezocatalytic H2 evolution under low-frequency vibration Penghui Hu, Yan Xu, Yanhua Lei, Jie Yuan, Rui Lei, Rong Hu, Junkang Chen, Difa Xu, Shiying Zhang, Ping Liu, Xiangchao Zhang, Xiaoqin...
In isotopically diluted water, the contribution due to intermolecular bend-to-bend energy transfer is suppressed, because of the frequency mismatch of the H–O–H bending mode and H–O–D/D–O–D bending modes. As such, in analogy to the O–H stretching band7,35, one can quantify the ...
An enhanced tunable rotational energy harvester for low-frequency vibration is proposed. It consists of a rotational vibrating system and a translating proof mass suspended by wire. The active tuning of the resonant frequency is implemented using the serial connection control of spiral springs, which ...
Low-frequency properties of TPU nanocomposites as storage modulus, loss modulus, and complicated viscosity improve as MXene concentration rises. The findings show that TPU nanocomposites can benefit from MXene nanoparticles in mechanical, thermal, and rheological aspects. Within this framework, to enjoy...
Energy-dissipation elastomers relying on their viscoelastic behavior of chain segments in the glass transition region can effectively suppress vibrations and noises in various fields, yet the operating frequency of those elastomers is difficult to control precisely and its range is narrow. Here, we repo...
It is shown that the correlation between the ground state frequency of the Franck-Condon active C C bond stretching ag vibration and the gravity center of the absorption spectrum corresponding to the 1Ag → 1Bu electronic transition in polyenes and their derivatives is readily rationalized in term...
Variable Frequency Inverter AC Drive GK150 Micro Frequency Inverters Brand: GTAKECertificate: CE, RoHS VFDs Model Power Rating Input Voltage Output FREQ Type GK150 series 0.4kW-2.2kW 208-240V / 380-480V ±10% 0.00-600.00Hz DC/AC to AC inverters Advantages Thanks...
vibration experiments were performed by shaker to measure Upvs frequency (Up-f) curves of PEHs undergoing coupled bending-torsion vibrations, and the half-power bandwidth proportion and materials mechanical quality factors are used to evaluate the harvesting efficiency from the multiple-frequency ...
The power maxima vs. frequency in the variable load case are wider than in the fixed load case. In other words, the harvesting efficiency in the variable load case is less sensitive to matching the mechanical resonance frequency to the vibration frequency, which underlines the importance of ...