Zobrazeno 1 - 10
of 149
pro vyhledávání: '"QingYun Di"'
Publikováno v:
IEEE Access, Vol 11, Pp 142601-142610 (2023)
An electromagnetic (EM) logging while drilling (LWD) tool is proposed for deep reading detection ahead of the drill bit. The EM LWD tool consists of one coil transmitter sub and two separated coil receiver subs. We utilize the attenuations of measure
Externí odkaz:
https://doaj.org/article/6498990a3e464cd0a6a3f8e22fd4745e
Publikováno v:
Remote Sensing, Vol 15, Iss 20, p 4924 (2023)
Detecting and mapping subsurface utilities in urban areas is crucial for identifying defects or damages in drinking and sewage pipes that can cause leaks. These leaks make it difficult to accurately characterize the pipes due to changes in their refl
Externí odkaz:
https://doaj.org/article/6ca6b60b5a6c4a89af3f8aadbc6da9ad
Publikováno v:
Engineering, Vol 10, Iss , Pp 13-20 (2022)
Externí odkaz:
https://doaj.org/article/d131e85efc7f4d4ca4daf097bed1caae
Publikováno v:
IEEE Access, Vol 9, Pp 54090-54100 (2021)
The wireless electromagnetic method (WEM), a new method combining geophysics and radio physics, can be used for seismic monitoring, ionospheric structure exploration and electrical structure detection within a depth of 10m underground. As the wavelen
Externí odkaz:
https://doaj.org/article/b29f5504472c44dfb79cac1472c17228
Publikováno v:
Remote Sensing, Vol 14, Iss 19, p 4716 (2022)
Qingchengzi is an important polymetallic mineral concentration zone in China. However, long-term mining has led to the depletion of proven reserves in the Qingchengzi ore concentration zone. Therefore, it is necessary to carry out prospecting in the
Externí odkaz:
https://doaj.org/article/563675a233cc4e9187b80b3f1deac588
Publikováno v:
Remote Sensing, Vol 14, Iss 13, p 3088 (2022)
Fully coupled lithosphere, atmosphere, and ionosphere theory has demonstrated that extremely low-frequency electromagnetic (ELF-EM) fields present a broad application prospect in deep resource exploration, but previous studies have ignored the contri
Externí odkaz:
https://doaj.org/article/8b02a1b42fb347919e9377d21f149377
Publikováno v:
Earth and Space Science, Vol 7, Iss 10, Pp n/a-n/a (2020)
Abstract Taohemu deposit is a superlarge silver‐polymetallic deposit discovered in the Great Xing'an Range metallogenic belt of China in recent years. The deposit occurs in the terrestrial volcanic rock sequences of Late Jurassic age. The ore bodie
Externí odkaz:
https://doaj.org/article/f2cb0812c2a44a88928277ea331a6878
Publikováno v:
Applied Sciences, Vol 11, Iss 22, p 10877 (2021)
Data telemetry is a critical element of successful unconventional well drilling operations, involving the transmission of information about the well-surrounding geology to the surface in real-time to serve as the basis for geosteering and well planni
Externí odkaz:
https://doaj.org/article/7e53d774c1514bb3a247ccf883a633e7
Publikováno v:
Energies, Vol 13, Iss 22, p 5873 (2020)
This paper deals with the study of multi-channel adaptive noise cancellation with a focus on its application in electromagnetic (EM) telemetry. We presented new variable step-size least mean square (LMS) techniques: regularized variable step-size LMS
Externí odkaz:
https://doaj.org/article/394a1766c08d4f5db4427a4f573586f1
Autor:
Qihui Zhen, Qingyun Di
Publikováno v:
Energies, Vol 13, Iss 19, p 5130 (2020)
An active clamp, three-phase, six-switch power factor correction rectifier with a one-cycle controller is proposed, which can effectively suppress the reverse recovery of the reverse parallel diode of the bridge arm switch and reduce the reverse reco
Externí odkaz:
https://doaj.org/article/40f6d95a54d646248b826ddb88db7c0f