Results 111 to 120 of about 18,206 (246)
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Chemically self‐charging aqueous zinc‐ion batteries (AZIBs) have emerged as promising candidates for energy storage technologies owing to their environmental autonomy and structural simplicity. Nonetheless, the self‐charging performance is significantly compromised by the limited potential difference between cathodes and oxygen, as well as the
Yan Wang +5 more
wiley +1 more source
Research on Capital Structure Optimization of Chinese Company [PDF]
, 2008 自1958年MM定理问世以来，资本结构问题就受到金融学家的持续关注。企业资本结构是如何决定和调整的，它一直困扰着理论界，企业资本结构的优化仍是个难解之谜。迄今为止，资本结构理论并没有十分肯定地提供决定企业资本结构的方法，实践观察和理论解释之间还是存在着相当大的距离。与此同时，在经济全球化的背景下，随着中国企业改革的日益深化，中国企业的产权制度、经营管理体制和融资行为等都发生了比较大的变化，从而引起企业资本结构出现新的明显变化。目前，中国企业的资本结构是否合理？影响中国企业资本结构的因素有哪些 ...
卢宇荣
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Platinum (Pt)‐based catalysts are crucial for the commercialization of hydrogen/metal air batteries, but they suffer from Pt scarcity, high cost, and nanoparticle dissolution/agglomeration, mainly leading to performance degradation. We address this by synthesizing a PtFe alloy catalyst (PtFe–PA–NC) via a phytic acid (PA) assisted pyrolysis ...
Chenyang Shu +9 more
wiley +1 more source
Gaoya dianqi, 2010 介绍了二极管真空绝缘中真空沿面闪络的理论、绝缘结构设计的要点以及沿面闪络域值的估算方法,提出了二极管结构优化设计的思路和方法,通过数值计算对二极管的径向绝缘结构进行了设计优化,一方面降低了三相点的电场强度和绝缘体沿面电场强度,另一方面提高了绝缘体表面的沿面击穿场强。实验结果表明,优化后的二极管绝缘结构满足设计指标,在正常工作电压下未发生击穿现象,并进一步对天鹅绒阴极二极管发射电流的幅值特性和脉宽特性进行了初步研究。
伍友成 +5 more
doaj
The Optimization of Multi-stage Financial Structure of Venture Enterprises in China [PDF]
, 2008 在经济全球化的今天，风险企业的发展一直是各国政府和理论界关注的重点。从长远看，一国要实现经济的可持续发展，其关键不是依靠资本和劳动力投入的增加，而必须依靠技术进步的推动。知识技术能否与经济相结合，不仅取决于高科技成果本身的市场价值，而且取决于是否存在能把技术进步转化为生产力的支持系统，其中最关键的是要有金融的支持。融资问题是关系到风险企业生存与发展的决定性问题，在我国鼓励科技创新、自主创业，构建多层次资本市场的大环境下，对于我国风险企业融资结构优化的研究具有很强的现实意义 ...
沐华
core
钝化层及P型基底结构优化对电子轰击型有源传感器电荷收集效率影响的研究
Chinese Journal of Lasers, 2023 宋园园 Song Yuanyuan +4 more
semanticscholar +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Tellurium (Te), emerging as a promising alternative to sulfur (S) and selenium (Se), offers significant advantages for potassium (K) ion storage due to its comparable theoretical volumetric capacity (2619 mAh cm−3) and higher electronic conductivity (∼102 S m−1), which promotes rapid charge transfer and improves reaction kinetics.
Sung Woo Cho +7 more
wiley +1 more source
Study on Capital Structure of Stated-Owned Commerical Banks [PDF]
, 2005 本文首先简单梳理了资本结构理论。1952年杜兰德提出了早期资本结构理论；随后，1958年，莫迪格利安尼和米勒提出了MM定理，开创了现代资本结构理论；到了20世纪70年代末，资本结构理论引入不对称信息的分析框架，进入到新的发展阶段。其次介绍了商业银行资本结构组成和巴塞尔协议。商业银行的资本概念是由巴塞尔协议提出的，由核心资本和附属资本两部分组成。根据巴塞尔协议规定，商业银行可运用的资本工具有：权益性工具，包括普通股、优先股和可转换优先股；混合型工具，由特殊用途工具和信托优先工具组成；债务性工具 ...
罗宣东
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Aqueous vanadium dioxide (VO2)‐based smart thermal insulation coatings represent a viable strategy to decrease building energy consumption and advance sustainable development goals. However, the inherent instability and limited compatibility with polymer matrices of VO2 hinder its widespread application.
Xiuxian Zhao +9 more
wiley +1 more source