Zobrazeno 1 - 10
of 4 019
pro vyhledávání: '"Lin Zhen"'
Publikováno v:
Open Mathematics, Vol 22, Iss 1, Pp 402-410 (2024)
Let GG be a graph with n(G)n\left(G) vertices and e(G)e\left(G) edges, and Sk(G){S}_{k}\left(G) be the sum of the kk largest Laplacian eigenvalues of GG. Brouwer conjectured that Sk(G)≤e(G)+k+12{S}_{k}\left(G)\le e\left(G)+\left(\phantom{\rule[-0.7
Externí odkaz:
https://doaj.org/article/5e98858bcdd5408ab7e8cbf6826ae275
Autor:
Liu Xiao-feng, Zhang Jin-shan, Zheng Yong-qiang, Wang Ze-feng, Xu Yong-quan, Fang Yang-zhen, Lin Zhen-yu, Lin Liang, Zhang Hong-peng, Huang Xiao-peng
Publikováno v:
BMC Musculoskeletal Disorders, Vol 25, Iss 1, Pp 1-8 (2024)
Abstract Objective to investigate the association between cartilage lesion-related features observed in knee osteoarthritis (OA) patients’ first MRI examination and incident knee surgery within 5 years. Additionally, to assess the predictive value
Externí odkaz:
https://doaj.org/article/56ab947ef33f4c519580c1b159c4b282
Publikováno v:
Redai dili, Vol 43, Iss 8, Pp 1536-1546 (2023)
Housing prices are influenced by various factors, which not only have different intensities but also different scale ranges. As a basic category of geographic research, scale is an important parameter for studying the phenomena, and subdividing the i
Externí odkaz:
https://doaj.org/article/d64689d3eceb4ea2bf610ac8fb6249fa
Publikováno v:
Remote Sensing, Vol 16, Iss 6, p 1089 (2024)
The farming–pastoral zone in northern China is one of the most ecologically sensitive areas globally, having experienced extensive cropland abandonment and land reclamation over decades, primarily influenced by policy adjustment and global warming.
Externí odkaz:
https://doaj.org/article/66e992d85a3745b2be06a73712d00ef3
Publikováno v:
Foods, Vol 13, Iss 4, p 568 (2024)
From land cover analysis, cropland expansion was a major driving factor for land use land cover changes in Nigeria from 2000 to 2020. This further highlights the food production needs in the country. While this land use change indicates a significant
Externí odkaz:
https://doaj.org/article/688ad355db144590a224890f5e1508ca
Publikováno v:
Environmental Research Communications, Vol 6, Iss 11, p 111001 (2024)
Ecological restoration has significantly improved ecosystem services (ESs) in the Chinese Loess Plateau. Identifying spatial priority restoration areas based on ESs plays a key role in future ecological restoration, as dynamic trade-off relationships
Externí odkaz:
https://doaj.org/article/e5f24507f1c74d0ea8278950be9ded65
Publikováno v:
Redai dili, Vol 41, Iss 6, Pp 1199-1208 (2021)
As an extension of the Belt and Road Initiative to the Arctic, the Polar Silk Road initiative has provided opportunities for international trade development along its routes. this can accelerate the transnational flow of economic factors and promote
Externí odkaz:
https://doaj.org/article/2f3c8f581f05456baae6301d410c78fb
Publikováno v:
Horticultural Plant Journal, Vol 7, Iss 5, Pp 401-410 (2021)
Citrus Huanglongbing, associated with Candidatus Liberibacter asiaticus (Las), is the serious disease of citrus worldwide. Here, we compared differences between leaf and root responses in Wanjincheng Orange (Citrus sinensis Osbeck) to Las infection u
Externí odkaz:
https://doaj.org/article/9ca8e11e78f741f7b34e403b6a00c069
Publikováno v:
Jisuanji kexue, Vol 48, Iss 9, Pp 174-180 (2021)
Face image inpainting is a hot topic of image processing research in recent years.Due to the loss of excessive sematic information,it is a difficult problem to inpaint large area missing of face images.Aiming at the problem of inpainting face images,
Externí odkaz:
https://doaj.org/article/f3f446b4900149f49352854b59afbc9d
Publikováno v:
Foods, Vol 12, Iss 17, p 3231 (2023)
The growing population, the transition dietary towards animal-based products, and the preference for the brand of grass-feeding livestock are bringing increasing pressure on natural grasslands, especially for dry-land areas. The Xilingol League of Ch
Externí odkaz:
https://doaj.org/article/dfe911f5307f452db41e90455355c1c8