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Theoretical Research on a D-band Traveling Wave Extended Interaction Amplifier

Chinese Journal of Electronics 2024年

作者： Zhongtao CUI Xuesong YUAN Xiaotao XU Dongrui CHEN Yifan ZU Matthew Thomas cole Qingyun CHEN Yang YAN Terahertz Science and Technology Key Laboratory of Sichuan Province School of Electronic Science and EngineeringUniversity of Electronic Science and Technology of China Department of Electronic and Electrical Engineering University of Bath

A traveling-wave, extended interaction amplifier is herein investigated for use in millimeter-wave and terahertz amplification sources. By placing engineered extended interaction cavities between the traveling wave structures, higher gain is obtained with a shorter high frequency circuit, compared with conventional traveling wave tubes architectures. The bandwidth of the device is significantly increased relative to extended interaction klystrons. A Dband beam wave interaction circuit of 26 mm long has been designed. Particle in cell simulations at 21.5 kV operating voltage, 0.3 A beam current, and 5 mW input power show that the maximum output power reaches 351 W, with a gain of 48.4 dB and 3-dB bandwidth of 1.42 GHz.

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Aerosol jet printing of surface acoustic wave microfluidic devices

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Microsystems & Nanoengineering 2024年第1期10卷 231-242页

作者： Joseph Rich bria. cole Teng Li Brandon Lu Hanyu Fu Brittany N.Smith Jianping Xia Shujie Yang Ruoyu Zhong James L.Doherty Kanji Kaneko Hiroaki Suzuki Zhenhua Tian Aaron D.Franklin Tony Jun Huang Department of Biomedical Engineering Duke UniversityDurhamNC 27708USA Department of Electrical and Computer Engineering Duke UniversityDurhamNC 27708USA Department of Mechanical Engineering Virginia Polytechnic Institute and State UniversityBlacksburgVA 24061USA Thomas Lord Department of Mechanical Engineering and Materials Science Duke UniversityDurhamNC 27708USA Deptartment of Precision Mechanics Faculty of Science and EngineeringChuo UniversityTokyo 112-8551Japan Department of Chemistry Duke UniversityDurhamNC 27708USA

The addition of surface acoustic wave(SAW)technologies to microfluidics has greatly advanced lab-on-a-chip applications due to their unique and powerful attributes,including high-precision manipulation,versatility,integrability,biocompatibility,contactless nature,and rapid ***,the development of SAW microfluidic devices is limited by complex and time-consuming micro/nanofabrication techniques and access to cleanroom facilities for multistep photolithography and vacuum-based *** simplify the fabrication of SAW microfluidic devices with customizable dimensions and functions,we utilized the additive manufacturing technique of aerosol jet *** successfully fabricated customized SAW microfluidic devices of varying materials,including silver nanowires,graphene,and poly(3,4-ethylenedioxythiophene)polystyrene sulfonate(PEDOT:PSS).To characterize and compare the acoustic actuation performance of these aerosol jet printed SAW microfluidic devices with their cleanroom-fabricated counterparts,the wave displacements and resonant frequencies of the different fabricated devices were directly measured through scanning laser Doppler ***,to exhibit the capability of the aerosol jet printed devices for lab-on-a-chip applications,we successfully conducted acoustic streaming and particle concentration ***,we demonstrated a novel solution-based,direct-write,single-step,cleanroom-free additive manufacturing technique to rapidly develop SAW microfluidic devices that shows viability for applications in the fields of biology,chemistry,engineering,and medicine.

关键词： printing wave fluid

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Capturing CO2 Emissions in the George C. Wallace Tunnel: A Case Study

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Intelligent Control and Automation 2024年第3期15卷 83-94页

作者： Gabe Canitz cole Ciesta Klint Green Justin Sanders Jason Valencia Jeremy Willingham Daniel Fonseca Department of Mechanical Engineering The University of Alabama Tuscaloosa AL USA

This paper describes the design of a ventilation system to be paired with a carbon capture system. The ventilation system utilizes the geometry of the George C. Wallace tunnel, located in the City of Mobile, Alabama, USA to capture and redirect emissions to a direct air capture (DAC) device to sequester 25% of the total CO2 mass generated from inside the tunnel. The total CO2 mass rate for the westbound traffic between the week-day hours of 7 a.m. and 6 p.m. has been estimated between 2,300 to 3,000 lbs./hr. By sequestering these emissions, the overall surrounding air quality was shown to be improved to a level that mirrors that from the pre-US industrial era of 270 ppm.

关键词： CO2 Capture Tunnel Ventilation Air Flow Analysis Jet Fan Sizing

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胸廓内动脉在冠状动脉旁路移植术中的应用

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中华胸心血管外科杂志 1993年第4期9卷 308-310页

作者：郦志军 bria.,B 310009 浙江医科大学附属第二医院

１９８８年～１９９１年施行胸廓内动脉搭桥术３８例。其中男３１例，女７例。年龄５４～７９岁。共搭桥１００根，平均每个病人搭桥２．６３根。包括大隐静脉桥５９根，胸廓内动脉桥４１根；其中左胸廓内动脉３７根，右胸廓内动脉４根... 详细信息

１９８８年～１９９１年施行胸廓内动脉搭桥术３８例。其中男３１例，女７例。年龄５４～７９岁。共搭桥１００根，平均每个病人搭桥２．６３根。包括大隐静脉桥５９根，胸廓内动脉桥４１根；其中左胸廓内动脉３７根，右胸廓内动脉４根。双侧胸廓内动脉搭桥３例，游离胸廓内动脉１例。平均主动脉阻断时间５２ｍｉｎ，体外循环转流８７ｍｉｎ。术后１例使用主动脉内气囊反搏仪，４例应用正性血管药物，１例行剖胸止血术。

关键词：胸廓内动脉冠状动脉旁路移植术

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