Results 21 to 30 of about 28,708 (260)
IEEE Access, 2022 Piezoelectric transducer is a key component of acoustic well-logging tool. Transducers used in acoustic well-logging tools usually have limited bandwidth, and their dominant frequencies severely drift with drastic change of borehole temperature when ...
Yongchao Yao +3 more
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High-efficiency microwave heating method based on impedance matching technology
AIP Advances, 2019 In a microwave heating process, part of microwave power may be reflected on the air-heating sample interface due to the impedance mismatching, caused by the relative dielectric permittivity difference between the air and the heating sample.
Qiang Chen +4 more
doaj +1 more source
The Journal of Engineering, 2015 A novel compact rat-race ring coupler with meander high-impedance transmission line and port impedance matching is presented in this Letter. First, a ring coupler with high port impedance is designed using meander lines.
Jun He, Bing-Zhong Wang
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Impedance-Matched Microwave Lens [PDF]
IEEE Antennas and Wireless Propagation Letters, 2008 11 pages, 8 ...
Alitalo, Pekka +3 more
openaire +2 more sources
An Impedance Matching Method Based on Optimized BP Neural Network for Vehicular Power Line System
IEEE AccessDuring the operation of the vehicular power line system, the loads are randomly connected and subsequently disconnected. This can result in an impedance mismatch of the vehicular power line system, which in turn has a significant impact on the normal ...
Renfa Song, Hanyan Li, Yongtao Li
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Adaptive Antenna Impedance Matching Using Low-Complexity Shallow Learning Model
IEEE Access, 2023 In this paper, an automatic antenna impedance matching technique is presented for a wide range of frequency bands where a low-complexity shallow learning model adaptively determines the component values of the matching circuit on a real-time. In general,
Mohammad Mahmudul Hasan +1 more
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Wideband strip antenna surrounding a ground plate
The Journal of Engineering, 2022 A wideband planar antenna, which is composed of a ground plate and a strip surrounding the plate, is proposed. Wideband impedance matching with fractional bandwidth over 130% is achieved by making the distance between the strip and the ground plate ...
Kyoichi Iigusa +3 more
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A Frequency-Tracking and Impedance-Matching Combined System for Robust Wireless Power Transfer
International Journal of Antennas and Propagation, 2017 One of the greatest challenges to power embedded devices using magnetically coupled resonant wireless power transfer (WPT) system is that the amount of power delivered to the load is very sensitive to load impedance variations.
Yanting Luo +3 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Survival after relapse in pediatric acute myeloid leukemia (AML) remains poor, highlighting the critical importance of identifying prognostic factors to guide optimal relapse management. Methods We investigated the prognostic impact of multiparameter flow cytometry (MFC) measurable residual disease (MRD) in 188 patients with first ...
Camilla Poulsen +21 more
wiley +1 more source
Shock and Vibration, 2015 As an important parameter in blasting design, charging structure directly influences blasting effect. Due to complex conditions of this blasting and excavating engineering in Jiangsu, China, the authors carried out comparative researches with coupling ...
Wenbin Gu +4 more
doaj +1 more source