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regulation and control of Electromagnetic Field in Radio-Frequency Circuits and Systems

Electromagnetic Science 2023年第3期1卷 22-49页

作者： Kaixue Ma Tianjin Key Laboratory of Imaging and Sensing Microelectronic Technology School of MicroelectronicsTianjin UniversityTianjin 300072China

Since the first demonstrations of radio-frequency(RF)circuits,the physics of the electromagnetic(EM)field and its regulation and control with codesigned circuits,have become essential competencies of RF circuit *** advanced regulation or control methods,numerous high-performance circuits have been developed at RF and millimeter-wave(mm-wave)*** main methods of electromagnetic regulation have been widely utilized,namely,the separation of electric and magnetic coupling paths,the manipulation of electromagnetic energy through the coupling of multiple tanks or multiple resonators,and the regulation of electromagnetic fields in air cavities or *** separated coupling paths of electric and magnetic fields provide guidance for designing a high-performance filter topology with a quasielliptical response through additional *** manipulation of the EM field through electrical and magnetic intercouplings of multitanks or multiresonators,such as are used in oscillators,power amplifiers(PAs),etc.,results in remarkable power efficiency,size reduction,and wide *** regulation of electromagnetism through an air cavity,patterned substrate,or metasubstrate reduces dielectric losses and size,especially when using a substrate integrated suspended line(SISL)*** excellent circuits have been reported based on SISL with low loss,high integration,and ***,we present state-of-the-art cases that demonstrate the benefits of EM field regulation and control.

关键词： Electromagnetic Mixed coupling Multiresonators and multitanks Patterned substrate and metasubstrate Radio frequency circuits regulation and control Separate electronic and magnetic coupling paths Substrate integrated suspended line

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Recent advances in fermentative biohydrogen production

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Progress in Natural Science:Materials International 2008年第3期18卷 253-258页

作者： Xuemei Liu a,b, Nanqi Ren a, Funan Song b, Chuanping Yang b, Aijie Wang a a Harbin Institute of Technology, Harbin 150010, China b Northeast Forestry University, Harbin 150040, China Harbin Institute of Technology Harbin 150010 China Northeast Forestry University Harbin 150040 China

Hydrogen energy, as a kind of clean energy with great potential, has been a hotspot for study worldwide. Based on the recent research on biohydrogen production, this paper gives a brief review on the following aspects: fermentative hydrogen production process and the engineering control statagy, key factors affecting the effciency of hydrogen production, such as substrates, cysteine, metal ions, anaerobic fermentation terminal products, and formic acid and ammonia. Moreover, anaerobic fermentative hydrogen-producing strain and reg- ulation and control of enzyme gene in fermentative hydrogen production are also discussed. Finally, the prospect of anaerobic fermen- tative biohydrogen production is proposed in three study areas, namely developing new techniques for breeding hydrogen-producing bacteria, exploitations of more strains and gene resources, and intensifying the application of microbial molecular breeding in hydrogen production.

关键词： Fermentation Biohydrogen production regulation and control Novel strains

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变化环境下水循环与水系统科学的研究与展望

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水资源研究 2012年第3期1卷 21-28页

作者：夏军武汉大学水资源与水电工程科学国家重点实验室

本文论述了在气候变化和人类活动影响下以水循环为纽带，将水文物理过程、地球生物及生物化学过程耦合以及社会经济发展联系的耗用水、水工程及管理的作用与反馈耦合的水系统科学的理念与方法论。通过国内外文献综述，分析了国际水系统... 详细信息

本文论述了在气候变化和人类活动影响下以水循环为纽带，将水文物理过程、地球生物及生物化学过程耦合以及社会经济发展联系的耗用水、水工程及管理的作用与反馈耦合的水系统科学的理念与方法论。通过国内外文献综述，分析了国际水系统科学的发展趋势，其中包括水系统观测、模拟、耦合与调控以及国内相关研究面临的学术问题，阐述了若干观点。展望了对该领域研究新的发展机遇与挑战。

关键词：环境变化水系统作用与反馈调控 Environmental Change Water System Interaction regulation and control

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