Cargando…
Analysis of China’s Oil Trade Pattern and Structural Security Assessment from 2017 to 2021
Oil is an important strategic resource of the country, and the oil trade structure is related to national oil security. In this paper, based on the data of China’s oil import trade from 2017 to 2021, using the methods of import concentration, the Shannon entropy index, and quantitative evaluation of...
Autores principales: | Huang, Yanrong, Han, Dan |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer US
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8967418/ http://dx.doi.org/10.1007/s10553-022-01362-y |
Ejemplares similares
-
Study on the Preparation and System of Desulfonated Anti-High Temperature Fluid Loss Agent
por: Su, Junlin, et al.
Publicado: (2022) -
Cryopreservation of individually selected sperm: methodology and case report of a clinical pregnancy
por: Desai, Nina, et al.
Publicado: (2012) -
Correlation between three assay systems for anti-Müllerian hormone (AMH) determination
por: Li, Hang Wun Raymond, et al.
Publicado: (2012) -
Comparing blastocyst quality and live birth rates of intravaginal culture using INVOcell™ to traditional in vitro incubation in a randomized open-label prospective controlled trial
por: Doody, Kevin J., et al.
Publicado: (2016) -
SNP array-based analyses of unbalanced embryos as a reference to distinguish between balanced translocation carrier and normal blastocysts
por: Treff, Nathan R., et al.
Publicado: (2016)