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Ruled invariants and associated ruled surfaces of a space curve
Liu, Huili,Liu, Yixuan,Jung, Seoung Dal Elsevier 2019 Applied Mathematics and Computation Vol.348 No.-
<P><B>Abstract</B></P> <P>As we know, a ruled surface is the tangent ruled surface of a space curve if and only if its ruled distance density function vanishes identically; a ruled surface is the binormal ruled surface of a space curve if and only if its ruled translation density function vanishes identically. The ruled distance density function and translation density function are differential invariants of ruled surfaces in three dimensional Euclidean space. In this paper we give the necessary and sufficient condition of which a ruled surface is the principal normal ruled surface of a space curve using the theories of ruled invariants of ruled surface in three dimensional Euclidean space.</P>
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刘弋轩(Yixuan Liu) YIXIN 출판사 2024 Journal of Humanities and Social Sciences Vol.2 No.4
As an important carrier of information dissemination, the media industry is also facing new challenges and opportunities brought about by technological change. In this context, the integration of broadcasting, acquisition and editing, as an important trend to conform to the general trend of media integration and improve the efficiency of news production, has attracted extensive attention and exploration and practice in the industry. The integration of broadcasting, collection and editing refers to the news production mode of breaking down the departmental barriers of news gathering, editing, and publishing with the support of digital technology, and realizing integrated operation and collaborative production. This model can effectively improve the timeliness and flexibility of news production, and meet the needs of focused and personalized information. In recent years, the introduction of artificial intelligence technology has injected new impetus into the integration of broadcasting, acquisition and editing, making it move towards a higher level of intelligence. Starting from the impact of artificial intelligence on the journalism industry, this paper deeply analyzes the application status and prospects of artificial intelligence technology in the process of integration of broadcasting, acquisition and editing, discusses the challenges of the integration of broadcasting, acquisition and editing in the intelligent environment, and puts forward strategic suggestions to promote the development of integration of broadcasting, acquisition and editing, in order to provide reference for the transformation and upgrading of the media industry. 媒体行业作为信息传播的重要载体,同样面临着技术变革带来的新挑战和新机遇。在此背景下,播采编一体化作为顺应媒体融合大势、提高新闻生产效率的重要趋势,引起了业界的广泛关注和探索实践。播采编一体化是指在数字化技术支持下,打破新闻采集、编辑、发布等环节的部门壁垒,实现一体化运作、协同生产的新闻生产模式。这种模式能够有效提高新闻生产的时效性和灵活性,满足分众化、个性化的信息需求。近年来,人工智能技术的引入为播采编一体化注入了新的动力,使其迈向更高的智能化水平。本文从人工智能对新闻业的影响出发,深入分析了人工智能技术在播采编一体化进程中的应用现状和前景,探讨了智能化环境下播采编一体化面临的挑战,并提出了推动播采编一体化发展的策略建议,以期为媒体行业的转型升级提供参考。
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Sensitive parameters’ optimization of the permanent magnet supporting mechanism
Yongguang Liu,Xiaohui Gao,Yixuan Wang,Xiaowei Yang 대한기계학회 2014 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.28 No.7
The fast development of the ultra-high speed vertical rotor promotes the study and exploration for the supporting mechanism. It hasbecome the focus of research that how to improve the speed and overcome the vibration when the rotors pass through the low-order criticalfrequencies. This paper introduces a kind of permanent magnet (PM) supporting mechanism and describes an optimization method ofits sensitive parameters, which can make the vertical rotor system reach 80000 r/min smoothly. Firstly we find the sensitive parametersthrough analyzing the rotor’s features in the process of achieving high-speed, then, study these sensitive parameters and summarize theregularities with the method of combining the experiment and the finite element method (FEM), at last, achieve the optimization methodof these parameters. That will not only get a stable effect of raising speed and shorten the debugging time greatly, but also promote theextensive application of the PM supporting mechanism in the ultra-high speed vertical rotors.
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朱奕璇· ( Zhu Yixuan ),李光春· ( Lee Guangchun ),劉子陽 ( Liu Ziyang ) 한국동양예술학회 2019 동양예술 Vol.43 No.-
本文旨在探討國家品牌形象與産品設計競爭力對消費者購買意愿的影響, 幷將消費者的消費行爲分爲購買意愿與推薦意圖兩個層級, 通過構建以國家品牌形象與産品設計競爭力爲自變量, 消費者購買意愿與推薦意圖爲因變量的模型硏究國家品牌形象與産品設計競爭力分別對于消費者購買意愿、推薦意圖的影響。本硏究運用問卷調査法收集數据, 幷通過SPSS統計軟件進行了信度分析和效度分析, 使用了AMOS進行了構造方程式模型分析。 根据分析結果可以得出, 國家品牌形象與産品設計競爭力對于消費者購買意愿與推薦意圖均有顯著的影響。
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Danlei Qiao,Yixuan Zhang,Chang Su,Guoqiang Liu,Qingxiang Wang,Lei Wen 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.124 No.-
Al-doped Fe-Mn and Ni-Mn based materials with P2-type layered structure has been synthesized andtested as a positive electrode material for rechargeable sodium batteries. The modification mechanismsof Al doping in Fe-Mn and Ni-Mn based materials have been discussed. The synthesized Al-doped Ni-Mnbased material Na0.67Mn0.8Ni0.16Al0.04O2 delivers a reversible capacity of 135.1 mAh g1, which correspondsto 92.1% of the initial capacity with excellent cyclability for 200 cycles. What’s more, it can stillremain a capacity of 96.2 mAh g1 at a current density of 2000 mA g1. When the voltage range increaseto 1.5 – 4.3 V, its initial discharge capacity can reach 190.3 mAh g1.
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