Results 21 to 30 of about 9,120 (157)
A Study on Thermoelectric Energy Harvesting System for Human Body Applications [PDF]
, 2017 随着传感器技术、嵌入式计算机技术、无线通信技术的快速发展，无线传感器网络（WSN）得到了广泛应用。传统电源已无法满足无线传感器网络应用的要求，因此俘获环境能量并将其转换为电能为无线传感器供电成为传统电源的一种替代方案受到越来越多的关注。过去十年利用热电元件从热量中俘获能量成为研究的热点。热电元件将温差形式的热能转换为电能，反之亦然。热电涉及的基本物理过程是塞贝克效应。塞贝克效应是指当两种不同金属的节点处存在温差时，就会产生电动势。热电元件主要有三个优点：不需要人工干预 ...
王昆鹏
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关于电路“互容 mutual capacitance”概念进展的5份资料汇集
, 2023 电路理论（关联“物理学”、“电磁场”）里的互容概念，于1990年代提出。“互容”是“互感”的对偶关系。1995年12月《关于“互容”概念的意义》，首次提出可以沿着互容概念设计集成电路的前景。这种“半电路、半电磁场”电路，同时使用载流子和电磁场传输信号或能量。该方面有5份相关资料没有 doi ，故而附录在本文后面，以期得到 ...
Zheng-Ling YANG
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Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Graphitic carbon nitride (g‐C3N4) doped with 3d transition metals (3d‐TM@g‐C3N4) has gained attention as a noble metal‐free alternative for oxygen evolution and reduction reactions (OER/ORR). Yet the key mechanisms driving its performance remain debated, especially across different charge states.
Jing Zhang +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Metal oxide‐based catalysts for oxygen reduction reaction (ORR) have drawn great attention in recent years. However, it remains technically challenging for the precise regulation of the overall performance due to the trade‐off effect among the activity, selectivity, and stability of electrocatalysts. Herein, a balancing strategy to control the
Haoran Ma +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 4, April 2026.ABSTRACT Lightweight and lead‐free radiation shielding materials remain urgently needed. This work designed a fluorite high‐entropy oxide (FHEO) system through a combined computational–experimental route. Density functional theory based on special quasi‐random structures was used to identify thermodynamically stable fluorites from a wide compositional ...
Xiangjie Duan +9 more
wiley +1 more source
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Low conductivity, slow ion‐diffusion, and limited reactive sites are common problems in electrocatalysts and electrode materials. In this study, a complex NiTe–CoTe heterojunction with abundant Te vacancies embedded in N, P, and F co‐doped hollow carbon nanorods (NiTe1−x–CoTe1−x/NPFC) was fabricated via a simple ionic liquid‐assisted ...
Mingjie Yi +7 more
wiley +1 more source
Analysis of Active Power Measurement Error [PDF]
, 2014 用对称分量分析了三序功率与三相功率间的关系,得出三相功率是同一相序的电压与电流的对称分量函数;三相电路平衡时,用两瓦法能正确测量三相三线电路功率,当三相四线电路不平衡时,用两瓦法测量功率存在误差。Using symmetrical components,this paper analyzes the relationship between 3-sequence power and 3-phase power and concludes that 3-phase power is a function ...
吴舒萍, 许建安, 黄兴平
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT As a promising alternative to sluggish Li2CO3‐based Li‐CO2 electrochemistry, Li2C2O4 offers a favorable 2e− discharge pathway, yet its selective formation and reversible decomposition remain debated. Herein, we propose a nonmetal‐metal synergistic catalyst—B‐Ti coregulated layered transition metal boride Ti18B18O9/graphene (B‐Ti/TiBOG)—to ...
Qiong Peng +8 more
wiley +1 more source
The Research and Application of High Power Factor Constant-current LED Driver [PDF]
, 2013 随着半导体照明技术的发展，LED光源以其独有的特点逐渐成为照明领域研究的热点，并显示出巨大的潜力和良好的发展前景。特别是由科技部、国家发展和改革委员会与信息产业部等有关部门共同组织实施的“国家半导体照明工程”的正式启动，标志着中国LED产业遇到了难得的发展机遇。 从供电电源来看，LED驱动电源作为LED照明系统的心脏，实质为开关变换器在LED照明领域的应用，其主要功能就是在一定的工作条件范围下限制流过LED的电流，而无论输入及输出电压如何变化。然而，随着电力电子设备普及的同时 ...
王晓林
core
Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Efficient and durable bifunctional electrocatalysts are vital for scalable water electrolysis. Here, we realize cobalt‐vacancy (Covac) engineering in CoFeP supported on N,P‐codoped carbon nanocages (Co1‐vacFeP/NPC) through a simple route comprising a CoFe Prussian blue analog precursor, phosphidation–pyrolysis, tannic‐acid etching, and a ...
Yuan‐Liang Yuan +6 more
wiley +1 more source