Zobrazeno 1 - 10
of 111
pro vyhledávání: '"Defeng Chen"'
Publikováno v:
Remote Sensing, Vol 16, Iss 18, p 3413 (2024)
The Doppler-spread problem is commonly encountered in space target observation scenarios using ground-based radar when prolonged coherent integration techniques are utilized. Even when the translational motion is accurately compensated, the phase res
Externí odkaz:
https://doaj.org/article/c1dd02e6ebf84e94bac1a9ccc5e09ee2
Publikováno v:
Remote Sensing, Vol 15, Iss 23, p 5484 (2023)
The stripmap mode is a basic and important mode for spaceborne synthetic aperture radars (SARs). Estimating the time-varying area observed by spaceborne SARs operating in stripmap mode is a practical but challenging field of research. In this article
Externí odkaz:
https://doaj.org/article/47ec3cf3e7574227ada742ddec9638b4
Publikováno v:
IEEE Access, Vol 10, Pp 76766-76779 (2022)
The problem of initial orbit determination (IOD) for Low Earth Orbit (LEO) objects using bistatic radar too-short arc (TSA) observations is addressed. For TSA observations, the traditional IOD methods suffer low accuracy. For LEO objects with stable
Externí odkaz:
https://doaj.org/article/e8642ee5182f4c54adcc8253e619b656
Publikováno v:
BMC Cancer, Vol 20, Iss 1, Pp 1-9 (2020)
Abstract Background The feasibility of submandibular gland (SMG) preservation in oral squamous cell carcinoma (SCC) has occasionally been analyzed, but the differences in survival associated with the presence or absence of SMG preservation remain unk
Externí odkaz:
https://doaj.org/article/d66d3954afaa4a418797a5c2d7de272f
Publikováno v:
Biotechnology & Biotechnological Equipment, Vol 34, Iss 1, Pp 966-974 (2020)
Selection for new single-flowered amaryllis with cultivated wild species or hybrids has continued for more than 200 years. However, our basic knowledge of the extent of genetic variation within the single-flowered amaryllis is still not sufficient, w
Externí odkaz:
https://doaj.org/article/b58c7dded10c4440961d687240f6d8ca
Autor:
Haichuan Zhou, Yining Zhu, Qian Wang, Jinqiu Xu, Ge Li, Defeng Chen, Yingying Dong, Huitao Zhang
Publikováno v:
IEEE Access, Vol 8, Pp 1567-1576 (2020)
Limited-angle computed tomography (CT) has arisen in some medical and industrial applications. It is also a challenging problem since some scan views are missing and the directly reconstructed images often suffer from severe distortions. For such kin
Externí odkaz:
https://doaj.org/article/99181369cb954bcdb3cd304bf9beb70c
Publikováno v:
Frontiers in Oncology, Vol 11 (2021)
Externí odkaz:
https://doaj.org/article/9777ae8ecf3e4226921e62ebf69e18b3
Publikováno v:
Frontiers in Oncology, Vol 11 (2021)
ObjectivePD-L1 is one of the predictors of immunotherapy efficacy. Our goal was to analyze its expression and prognostic significance in high-grade salivary gland carcinoma (SGC).MethodsPD-L1 expression was evaluated using paraffin-embedded specimens
Externí odkaz:
https://doaj.org/article/9065eb94e01c4f1eb86c7851088b8b42
Publikováno v:
Acta Scientiarum Polonorum: Hortorum Cultus, Vol 20, Iss 3 (2021)
The genetic diversity and population structure of 38 commercial accessions of double-flowered amaryllis (Hippeastrum hybridum) from the Netherlands and South Africa were evaluated using sequence-related amplified polymorphism (SRAP) markers. Thirty S
Externí odkaz:
https://doaj.org/article/408d04350b5d4b4697b939f7e11d18d8
Autor:
Zhan Yang, Wei Du, Xu Zhang, Defeng Chen, Qigen Fang, Yuezhong He, Yang Yang, Ding Li, Jie Fan
Publikováno v:
Frontiers in Oncology, Vol 11 (2021)
ObjectiveOur goal was to analyze the demographic and pathologic characteristics as well as prognosis in nonsmoking and nondrinking (NSND) oral squamous cell carcinoma (SCC) patients compared with typical oral SCC patients.Patients and MethodsA total
Externí odkaz:
https://doaj.org/article/293a8a2c52e44d6da434009ed5e0d61d