Results 51 to 60 of about 10,921,507 (271)
Vibration Analysis and Optimal Control of Hydraulic Turbine Based on Sliding Mode Control Strategy
IEEE AccessThe turbine generator unit plays a very important role in maintaining the stability of the power system and improving the quality of power. However, hydropower units will bring the risk of low-frequency oscillation or ultra-low frequency oscillation to ...
Xiaoping Huang +2 more
doaj +1 more source
AIP Advances, 2019 Mechanical frequency up-conversion is a technique whereby a high-frequency oscillation is induced from a low-frequency source and aims to address inherent problems in low frequency vibration energy harvesting.
Yipeng Wu +5 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Ferroelectric tunnel junction devices based on epitaxial undoped ferroelectric HfO2 films demonstrate stable switching endurance of over 106 switching cycles, low write voltages of ±3 V, 16 measured resistance states, and neuromorphic capability.
Markus Hellenbrand +13 more
wiley +1 more source
Summer snow extent heralding of the winter North Atlantic Oscillation [PDF]
, 2003 [1] Winter climate over the North Atlantic and European sector is modulated by the North Atlantic Oscillation (NAO). We find that the summer extent of snow cover over northern North America and northern Eurasia is linked significantly (p < 0.01) to the ...
Saunders, MA, Qian, BD, Lloyd-Hughes, B
core
Ultra-low-power second-order nonlinear optics on a chip
, 2021 Second-order nonlinear optical processes are used to convert light from one wavelength to another and to generate quantum entanglement. Creating chip-scale devices to more efficiently realize and control these interactions greatly increases the reach of ...
Christopher J. Sarabalis (14383206) +9 more
core +1 more source
Analog/RF Performance Investigation of Dopingless FET for Ultra-Low Power Applications
IEEE Access, 2019 In this paper, we investigated the performance of a dopingless (DL) double gate fieldeffect transistor (DL-DGFET) for ultra-low power (ULP) analog/RF applications. It is observed that the source/drain metal electrode work-function engineering in DL-DGFET
Ankit Sirohi +2 more
doaj +1 more source
Mono‐Material Polydisulfides for Pressure Sensitive Adhesive Tapes With Closed‐Loop Recyclability
Advanced Functional Materials, EarlyView.A high‐performance pressure‐sensitive adhesive (PSA) tape is developed where both the adhesive layer and plastic backing layer can be recycled back to monomer in a closed‐loop cycle. Both layers of the tape are composed of analogous polydisulfide copolymers using only two unique monomers, thus giving it a mono‐material design and enabling recycling of ...
Woojung Ham +3 more
wiley +1 more source
Micromachines, 2023 Due to their lack of pollution and long replacement cycles, piezoelectric energy harvesters have gained increasing attention as emerging power generation devices. However, achieving effective energy harvesting in ultra-low-frequency (
Ning Li +4 more
doaj +1 more source
North-south asymmetry of ultra-low-frequency oscillations of Earth’s electromagnetic field
Solar-Terrestrial Physics, 2017 In the paper, we present the result of an experimental study of north-south asymmetry of ultralow-frequency electromagnetic oscillations IPCL. This study is based on observations made at Mirny Observatory (Antarctica). IPCLs are excited in the dayside sector of the auroral oval in the range 3–10 min periods and represent one of the most powerful types ...
Guglielmi A.V., Klain B.I., Potapov A.S.
openaire +4 more sources
Advanced Functional Materials, EarlyView.A gradient‐engineered all‐paper sensor is fabricated by integrating MXene and in situ grown AgNPs within hierarchical cellulose networks. The device breaks the sensitivity–detection range trade‐off through cascaded conductive pathways, enabling ultrahigh pressure sensitivity, humidity–pressure decoupled dual‐mode sensing, and outstanding EMI shielding,
Ao Li +7 more
wiley +1 more source