Identification of small-scale auroral structures is key to searching for auroral events. However, it is impracticable for humans to manually select sufficient aurora events for statistical analysis, and it is also challenging for computers because of the non-rigid shape and fluid nature of auroras. Fold structure is the most common type of auroral small-scale structure, and its appearance is indicative of a variety of auroral events. This paper proposes a small-scale aurora structure identification framework to automatically detect aurora fold structures. First, the location and shape of auroras are identified based on a deep learning segmentation network. Then, the skeleton of the auroral shape is extracted to represent the trajectories of auroras. Finally, the proposed skeleton-based fold identification module (SFIM) can detect the aurora fold structure. To evaluate the effectiveness of the proposed method, we built an aurora fold structure sample dataset, namely F-dataset, containing 2000 images at 557.7 nm obtained by the all-sky imagers at Yellow River Station (YRS), Ny-Ålesund, Svalbard. Experimental results show that automatic identification can achieve good consistency with human perception. Statistical analysis of over 30,000 images shows that the fold occurrence has a distinct double-peak distribution at pre-noon and post-noon.
At present, the Tibetan medicine culture formed by Tibetan medicine and Tibetan Buddhism has a state of aphasia in the global multicultural context. Furthermore, the medicinal resources bred in the special geographical location of the Qinghai-Tibet Plateau are not only the important material basis for the formation and development of Tibetan medicine culture but also provide potential value for modern drug discovery and medical research. Based on the existing research texts and scientific research data, this paper constructs the SPS sustainable development framework by combing the general situation of the medicinal resource and industry in the Qinghai-Tibet plateau, the background, and the prospect of the formation of Tibetan medicine culture, which provides the basic theoretical research and relevant countermeasures for the sustainable development and resource reuse of Tibetan medicine in the context of Tibetan medicine culture. It is meaningful that the research on the cultural propaganda of Tibetan medicine's national idea and medicinal value has found that the cultural industry code and the resource application potential in the Qinghai-Tibet Plateau region will have prominent geo-economic benefits in the near future, especially in the moment when the global epidemic is suddenly spreading.
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