Results 21 to 30 of about 9,198 (256)
Applied Sciences, 2022 In order to further explore the technical difficulties involved in orienting the sparse-aperture imaging system towards practical applications, this paper proposes an optical–mechanical structure design scheme and performance simulation, as well as ...
Junhong Qian +5 more
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Energy Reports, 2021 The operation process of free-piston engine generator (FPEG) can be divided into starting process and power generation process, and each of them faces severe challenges especially for the opposed-piston FPEG.
Limin Wu +5 more
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Remote Sensing, 2022 A segmented primary mirror is very important for extra-large astronomical telescopes, in order to detect the phase error between segmented mirrors. Traditional iterative algorithms are hard to detect co−phasing aberrations in real time due to the long ...
Yirui Wang +4 more
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Piston Detection of Optical Sparse Aperture Systems Based on an Improved Phase Diversity Method
Photonics, 2023 The piston error has a significant effect on the imaging resolution of the optical sparse aperture system. In this paper, an improved phase diversity method based on particle swarm optimization and the sequential quadratic programming algorithm is ...
Yang Zhao +5 more
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A Tip–Tilt and Piston Detection Approach for Segmented Telescopes
Photonics, 2020 Accurate segmented mirror wavefront sensing and control is essential for next-generation large aperture telescope system design. In this paper, a direct tip–tilt and piston error detection technique based on model-based phase retrieval with multiple ...
Shun Qin, Wai Kin Chan
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Actuators, 2023 The bi-tandem axial piston pump is an indispensable powerhouse in high-pressure and high-power engineering hydraulic systems, with its output flow response characteristics under pressure disturbance exerting a significant influence on the working process
Zhiyuan Sun +3 more
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Conceptual Design of a Device for Online Calibration of Spirometer Based on Neural Network [PDF]
Journal of Biomedical Physics and Engineering, 2023 Daily calibration of spirometry devices plays an important role in promoting the accuracy of pulmonary diagnostic results. It is needed to have more precise and adequate instruments for calibrating spirometry during the clinical use.
Vahid Reza Nafisi +2 more
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Design and Analysis of Pneumatic Downforce Regulating Device for No-Till Corn Planter
Agriculture, 2022 To avoid the issues of undesired soil compaction and seeding depth variation caused by the downforce fluctuation of the corn no-till planter, the influence of the structural parameters of the air spring on the downforce was researched in this paper, by ...
Xinpeng Cao +5 more
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Motion characteristics of a novel elastic rotating micro-electromechanical power system
Advances in Mechanical Engineering, 2020 This article reports a conceptual study of a new micro-electromechanical power system using elastic leaf piston rotating engine rather than conventional engines as the main component. The proposed innovative elastic rotating micro-electromechanical power
Chunzhi Liu +3 more
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Energy Conversion and Management: X, 2022 The Free Piston Engine (FPE) can be considered a viable and promising option in future low-carbon technology development. When coupled to the Linear Electric Machine (LEM) to produce electrical energy, its characteristic non-linear dynamics typically ...
Patrick Brosnan +4 more
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