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Copyright of Urban Mass Transit is the property of Urban Mass Transit Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Isotopes is the property of Journal of Isotopes Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

[Purpose/Significance] Ancient map literature is an important component of Chinese ancient literature, which is the subjective cognition, expression, exploration, and recording of the objective environment by ancient ancestors. It mainly uses map language such as symbols, text, graphics, and lines to depict simple geographical spatial information locally on physical carriers such as clay tablets, stone tablets, woodcuts, silk, and paper. It records and carries the glorious process of civilization continuation and cultural inheritance in China for thousands of years. How to better do a good job in its digital protection and development and utilization is an important issue worth paying attention to in the current field of information resource management. [Method/Process] On the basis of a brief exposition of the cultural connotations and important values of ancient map literature, this article briefly summarizes the current status of its digital research, and then designs and proposes a knowledge-based description framework for ancient map literature in China in the digital age. This framework clarifies the key modules of resource entities, description objects, knowledge abstraction, map expression, map display, etc. of ancient map literature, and analyzes the relevant key modules separately, Finally, taking the "Wanli Coastal Defense Map" drawn in Volume 8 of Zheng Kaiyang's Miscellaneous Works as an example, typical application scenarios such as automatic question and answer services for ancient map literature knowledge, intelligent construction services for the South China Sea rights protection evidence chain, and interactive narrative services for ancient map literature were explored. [Results/Conclusions] Chinese ancient maps and texts showcase the expression and cognition of ancient Chinese ancestors towards the real physical world and geographical space through methods such as landscape painting, six body drawing, planning, and triangulation. They not only carry the excellent genes of China's thousands of years of Chinese civilization and excellent traditional culture, but also serve as important carriers for telling Chinese stories, spreading Chinese spirit, and showcasing China's image; The intervention of mathematical theory and technology has expanded the object space of ancient maps from traditional binary space to a diverse space composed of geographic space, cultural space, information space, and technological space; The knowledge-based description of ancient map literature in the era of digital intelligence requires a comprehensive understanding of all entities, elements, and knowledge related to it, achieving cross domain knowledge organization and integration centered on its geographic spatial information (such as place names, divisions, and locations), involving the identification, extraction, analysis, organization, association, positioning, and transformation of relevant contextual information. This makes the universality of this theoretical framework still need to be strengthened, In the future, it is necessary to continuously expand the existing theoretical and technical framework to meet the knowledge-based description needs of different types of ancient map literature. [ABSTRACT FROM AUTHOR]

As an ultrawide band gap semiconductor, two-dimensional (2D) hexagonal boron nitride ( h-BN) has attracted considerable research interest because of its unique properties such as excellent electrical insulation, high breakdown field, high thermal conductivity, and good chemical inertness, which make it a promising candidate as dielectric and substrate layers for devices based on other 2D materials. The synthesis of high-quality and large-area h-BN layers with few defects is strongly desirable for these applications. In this review, the methods and progress of the epitaxial growth of 2D h-BN on transition metal, h-BN films on dielectric and semiconductor substrates are described in detail. The high-quality 2D h-BN layers can be epitaxially grown on the transition metal substrates with catalytic activity including Cu, Ni, Fe, Pt, etc. However, it is a great challenge to directly grow h-BN single crystal films on insulating dielectric or semiconductor substrates. Sapphire is a preferred substrate for the growth of h-BN for its good thermal stability and chemical stability. The growth of h-BN thin films on sapphire substrate has been widely reported by various techniques, such as chemical vapor deposition, molecular beam epitaxy, ion beam sputtering deposition, metal-organic vapor phase epitaxy, high-temperature post-annealing and so on. Based on these techniques, high-quality 2D h-BN has been prepared on sapphire substrates, it can also be integrated into the epitaxial growth processes of some existing III-V compound semiconductors, laying the foundation for the large-scale application of h-BN. In addition, the growth of h-BN single crystal films have also been attempted on semiconductor substrates like graphene, silicon and germanium, which provide an attractive strategy for the fabrication and application of h-BN-based heterojunctions. [ABSTRACT FROM AUTHOR]

[Purpose/Significance] As an important entry scenario into the application layer of the meta universe, digital collections can not only solve the identity authentication and rights governance problems of digital resources in the meta universe, but also become an important interface connecting a library's physical entity and the virtual space of the meta universe. At present, digital collections have attracted much attention in digital art, digital publishing, digital cultural creation, museums and other fields, but relatively little attention has been paid in the field of libraries. As a new business form in the digital economy era, digital collectibles have typical characteristics such as uniqueness, traceability, immutability, and ease of ownership confirmation. They are the perfect display of digitalization, virtualization, and ownership confirmation of library collection resources (such as books, ancient books, map literature resources, and various digital resources) in the metaverse space of libraries. Therefore, based on a scientific definition of the connotation and characteristics of library digital collections, we attempt to explore their value chain of "resources creativity casting dissemination service". [Method/Process] This article analyzes the differences and connections between the metaverse and digital collectibles, explains the connotation and characteristics of library digital collectibles, and conducts in-depth analysis of the paradigm construction of library digital collectibles' value chain from the perspective of the metaverse from five dimensions: resource end, creative end, casting end, distribution end, and service end. The scene embedding of its value chain is divided into structural embedding. There are three modes of functional embedding and memory embedding and they are explained separately. [Result/Conclusion] Research suggests that digital collections mainly originate from NFT, which is a local concept of NFT's localization of digital assets in China. Digital collections mainly include works of art, ancient books and documents, precious cultural relics, digital cultural creation, digital publications, model surroundings, news collections, digital music, 3D models and other types. Their digital resources are mainly text, images, audio, video and 3D models. Their creation sources are mainly from physical entity resources and virtual digital resources. Library digital collections are generated based on the policy environment, technical conditions, resource structure, business characteristics, and cultural precipitation in which Chinese libraries are located. They strip away the attributes of NFT virtual finance and virtual currency, and have Chinese characteristics and library business characteristics. Blockchain (especially alliance chain) technology is used to digitize the casting, distribution, and circulation of library specific collection resources, literature resources, or digital resources, the only trusted digital rights certificate provided for collection and use. [ABSTRACT FROM AUTHOR]

Copyright of Multipurpose Utilization of Mineral Resources / Kuangchan Zonghe Liyong is the property of Multipurpose Utilization of Mineral Resources Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Guangdong University of Technology is the property of Journal of Guangdong University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Journal of Guangdong University of Technology is the property of Journal of Guangdong University of Technology and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Progress in Modern Biomedicine is the property of Publishing House of Progress in Modern Biomedicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)