Results 21 to 30 of about 13,725 (169)
Research on Bridge Modular Switched-Capacitor AC-AC Converter and Control Strategy [PDF]
, 2016 在需要对交流电进行升降压的场合，AC-AC功率变换器相比传统自耦变压器具有体积小、重量轻等优点。开关电容功率变换器由于不含磁性元件，能够显著提高变换器效率、减小体积。本文首先提出了一种桥式模块化双向开关电容AC-AC变换器，能实现变比为4n或1/4n(n=1，2，3…)倍的AC-AC变换。阐述了该变换器的拓扑结构、工作原理及基本性能。设计并研制了一台实验样机，额定功率600W，电压220V/55Vrms，开关频率100kHz。 然后，针对传统开关电容变换器输出电压不可调节问题 ...
李彤
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Rare Metals, Volume 45, Issue 3, March 2026.ABSTRACT Fe‐based amorphous alloys are attractive soft magnetic materials for next‐generation power electronics, yet simultaneously achieving high saturation magnetic flux density (Bs), low coercivity (Hc), and low core loss under scalable processing conditions remains challenging.
Zhi‐Jun Guo +10 more
wiley +1 more source
Research and application on induction heating technology based on the technique of quasi-resonant [PDF]
, 2016 感应加热作为新兴学科，在近30年来得到了真正应用，顾名思义，感应加热是利用电磁感应的原理使被加热的对象内部产生涡流，然后利用涡流做功来达到加热的目的。由于感应加热具有加热效率高、速度快、可控性好并且容易实现机械化、自动化的优点，已在加热、铸造、焊接、热锻和表面热处理等行业得到广泛的应用。 本文首先介绍了感应加热技术在国内外的发展现状和未来发展趋势，紧接着介绍了电磁感应加热技术的基本原理和实现方式。详细分析了串、并联谐振逆变电路的优缺点，并对各种逆变器进行比较 ...
戴立业
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Wildlife Letters, Volume 4, Issue 1, Page 23-31, March 2026.American badgers, a medium‐sized carnivore occurring in much of North America, are important predators in prairie landscapes though our understanding of their habitat use requirements in these areas is unclear. We used a multi‐scale approach to understand American badger habitat use at both local and landscape scales.
Colleen W. Piper +5 more
wiley +1 more source
Separation and Determination of As/Se Species by Chromatography and Inductively Coupled Plasma Mass Spectrometry [PDF]
, 2015 砷和硒是两种与人类生活息息相关的元素，虽然两种元素在生命体系中所起的作用不同，但它们的毒性、生理活性、代谢机理等均与其存在形态密切相关，因此砷、硒两种元素一直是元素形态分析的研究热点之一。 元素形态分析是识别或测定待测样品中一种或多种元素的一个或多个化学形态的分析过程，是目前环境化学、生态毒理学、分析化学等学科的研究热点。经过三十几年的发展，将各类色谱分离技术与元素特效检测器联用，是目前解决元素形态分析最常用的分析方法。其中高效液相色谱（HPLC）与电感耦合等离子体质谱（ICP-MS）联用技术 ...
张洋
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Smart Biomaterials and Dressings for the Treatment of Chronic Inflammatory Skin Diseases
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Chronic inflammatory skin diseases, encompassing immune‐inflammatory conditions and infection‐associated dermatoses, pose significant clinical challenges due to high prevalence, recurrence, and therapeutic resistance, affect over 30% of the global population.
Zehao Lan +5 more
wiley +1 more source
Research on Signal Pickup System for the Wireless Passive LC Resonant Pressure Sensor [PDF]
, 2016 在高温、潮湿等恶劣的环境中以及眼内压测量、疤痕治疗等应用场合，不便利用有线有源的传感器进行压力监测，LC谐振式无线压力传感器采用无线无源方式实现对压力信号的提取，拓展了压力传感器的应用范围。目前，LC谐振式无线压力传感器的信号拾取主要使用网络分析仪或阻抗分析仪，不仅成本高，而且携带不便，极大限制了非实验室场合的应用。本文针对LC谐振式无线MEMS压力传感器的信号拾取现状，从理论分析、系统仿真、硬件设计、软件设计和实验验证等方面展开研究，设计了基于阻抗实部测量法的信号拾取系统。 基于电感耦合理论 ...
蔡建法
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Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT With the continuous advancement of materials science and technology, the rare metal gallium has increasingly emerged as a promising alternative to the toxic metal mercury. Although existing research has predominantly focused on the high electrical conductivity and excellent deformability of liquid metal (LM), its intrinsic fluidic property ...
Feifan Guo +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Fluxgate sensors with Co‐rich amorphous microwires, widely used for their low noise in magnetic field measurements, encounter significant challenges in high‐temperature environments such as well drilling and geological exploration. Prolonged thermal aging degrades the performance of Co‐rich amorphous microwires, resulting in increased noise ...
Lining Pan +10 more
wiley +1 more source
Mechanistic Study on Selenite Absorption and Metabolism Promoted by Exogenous Nitric Oxide in Rice Seedling Roots [PDF]
, 2015 硒(selenium，Se)作为人和动物的必需元素之一，有非常重要的生理功能。可食性植物是人和动物的主要硒源，探索植物硒累积分子机制以及寻找提高植物硒含量的策略具有重要现实意义。 一氧化氮(nitricoxide，NO)作为一种重要的生物信号分子，在动植物体内起着重要的作用。低浓度NO对植物的生长发育以及多种逆境胁迫抗性具有重要影响。已有部分研究表明硒能引起植物体内NO的变化，且NO能缓解硒诱导的水稻脂质过氧化，但目前关于NO对硒吸收代谢调控的分子机制研究尚未报道。本文以重要的粮食作物水稻 ...
李秀玲
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