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9th International Conference on Surface Engineering, ICSE 2024

作者： Shuai, Shixiang Jiang, Angran Che, Zhigang Lei, Fan Sun, Rujian Co. Ltd. Chengdu610091 China Aviation Key Laboratory of Science and Technology on Advanced Surface Engineering AVIC Manufacturing Technology Institute Beijing100024 China

Laser shock peening (LSP) represents an advanced manufacturing method for surface strain strengthening and anti-fatigue production. In this study, laser shock peening (LSP) was employed to treat fillet structures made from 7050 aluminium alloy. Residual stress distribution and high cycle fatigue performance were investigated by numerical simulation and experiment, respectively. Further, fatigue life extension was verified with mathematical statistics methods. Results show that by utilizing the following LSP parameters: pulse energy of 25 J, spot size of Φ4.5 mm, overlapping rate of 50%, and peening twice, the average compressive residual stress on the fillet structure surface reached 218.3 MPa, the maximum residual stress in the depth direction located at a depth of 0.9 mm, and the thickness of residual stress affecting layer was 1.6 mm. Besides, the high cycle fatigue life significantly improved after LSP. The mean high-cycle fatigue life of the LSP-treated side was 160,626 cycles, in comparison to 58,606 cycles for the BM side. Furthermore, the t-test method of paired comparative experiments demonstrated that the high-cycle fatigue life of the LSP-treated side was 2.18 to 3.36 times higher than that of the BM side at the 95% confidence level. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Aluminum alloys

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Research on residual design of ignition circuit of ejection seat 24

Research on residual design of ignition circuit of ejection ...

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5th International Conference on Computer Information and Big Data Applications, CIBDA 2024

作者： Wang, Wensheng Wu, Shuanglong Li, Jin Jin, Liying Aviation Key Laboratory Science and Technology on Life-Support Technology Xiangyang Hubei441003 China Aerospace Life-Support Industries Ltd. Xiangyang Hubei441003 China Xiangyang Key Laboratory of Intelligent Manufacturing and Machine Vision Hubei University of Arts and Science Hubei Province Xiangyang441053 China

ISBN: (纸本)9798400718106

At present, the programmed ignition circuit is used in the ejection seat to stimulate the explosive materials. This paper analyzes the ignition circuit architecture of the parachute projectile fired by the electric detonator on the ejection seat, and puts forward two other feasible ignition schemes. Combined with the task reliability block diagram and model, the three schemes are respectively quantitatively calculated and qualitatively analyzed, thus the optimal fire scheme is determined. Then it provides a reference for the redundancy design of other parts of the ejection seat. © 2024 ACM.

关键词： Ejection seats

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Incorporation of nano/micron-SiC particles in Ni-based composite coatings towards enhanced mechanical and anti-corrosion properties

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International Journal of Minerals,Metallurgy and Materials 2022年第1期29卷 153-160页

作者： Bowei Zhang Qiao Zhang Zhan Zhang Kui Xiao Qiong Yao Guojia Ma Gang Sun Junsheng Wu Institute for advanced materials and technology University of Science and Technology BeijingBeijing 100083China National Materials Corrosion and Protection Data Center University of Science and Technology BeijingBeijing 100083China Key Laboratory of Space Lauching Site Reliability Technology Haikou 571000China Department of Materials Application Research China Aviation Manufacturing Technology InstituteBeijing 100024China

Ni-based composite coatings incorporated with nano/micron SiC particles were fabricated via electrochemical co-deposition in Watts bath,followed by the evaluation of their mechanical and anti-corrosion *** micrographic observations suggest that the SiC particles with various sizes can be well incorporated to the Ni substrate.X-ray diffraction(XRD)patterns indicate that SiC particles with smaller sizes could weaken the preferential growth of Ni along(200)*** addition,it is found that the incorporated SiC particles with medium micron sizes(8 and 1.5μm)could significantly enhance the micro-hardness of the Ni composite ***,electrochemical measurements demonstrate that micron-sized SiC particles would weaken the corrosion resistance of Ni composite coatings ascribed to the structure defects *** contrast,the combined incorporation of nanosized(50 nm)SiC particles with medium micron(1.5μm)ones is capable of promoting the compactness of the composite coatings,which is beneficial to the long-term corrosion resistance with negligible micro-hardness loss.

关键词： Watts bath Ni coating SiC particles corrosion resistance electrodeposition

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Multi-branch low-light enhancement algorithm based on spatial transformation

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Multimedia Tools and Applications 2024年第18期84卷 1-21页

作者： Wang, Wenlu Sun, Ying Zou, Chunlong Tang, Dalai Fang, Zifan Tao, Bo Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education Wuhan University of Science and Technology Wuhan430081 China School of Computer Information Management Inner Mongolia University of Finance and Economics Hohhot010051 China College of Mechanical Engineering Hubei University of Automotive Technology Shiyan442000 China Research Center for Biomimetic Robot and Intelligent Measurement and Control Wuhan University of Science and Technology Wuhan430081 China Precision Manufacturing Research Institute Wuhan University of Science and Technology Wuhan430081 China Hubei Key Laboratory of Hydroelectric Design & amp Maintenance China Three Gorges University Yichang443002 China

Many state-of-the-art low-light image enhancement techniques now suffer from issues like color distortion, detail blurring, and the halo effect, hindering their ability to produce visual effects. This paper presents a multi-branch low-light enhancement algorithm based on spatial transformation to significantly improve the visual impact of images under low-light settings, overcoming the limitations of existing approaches. The process involves dividing the initial low-light picture into three distinct layers. Bootstrap filtering and Contrast Limited Adaptive Histogram Equalization are used to process the main feature layer. Primary feature extraction is used to extract features for the compensation layer, which is then integrated with Contrast Limited Adaptive Histogram Equalization and MSRCR. The auxiliary layer utilizes spatial transformation to apply gamma correction to the V-channel and performs color space transformation and additional processing. Ultimately, these three layers are combined and refined to create the final improved image. Based on the experimental results, the proposed method outperforms the standard MSRCR algorithm by 52.47%, 71.58%, and 12.10%, respectively, on the assessment metrics AG, SD, and IE. LOE declines by 22.3%. The processed image presents a good visual quality, effectively enhancing the image brightness while retaining a large amount of information and improving the image details. This paper proposes an effective method to deal with the problem of low illumination image enhancement, which provides a strong reference for future research and application in related fields. © The Author(s), under exclusive licence to Springer science+Business Media, LLC, part of Springer Nature 2024.

关键词： Image enhancement

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Enhanced proton irradiation resistance in Cs-doped CH_(3)NH_(3)PbI_(3) films and solar cells

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Journal of Energy Chemistry 2022年第6期31卷 261-269,I0008页

作者： Pan Luo Xue-Yin Sun Hao Jiang Li Yang Yang Li Wen-Zhu Shao Liang Zhen Cheng-Yan Xu School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001HeilongjiangChina National Key Laboratory for Precision Hot Processing of Metals Harbin Institute of TechnologyHarbin 150001HeilongjiangChina MOE Key Laboratory of Micro-Systems and Micro-Structures Manufacturing Harbin Institute of TechnologyHarbin 150080HeilongjiangChina Sauvage Laboratory for Smart Materials School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055GuangdongChina

Mixed-cation perovskite solar cells have attracted tremendous attention in space applications due to their excellent power conversion efficiency (PCE) and stability to light and *** the evolution of photovoltaic performance in different space environments has been investigated,the role of inorganic cesium ions (Cs^(+)) in the enhancement of irradiation resistance needs to be further ***,the structure and performance evolution of Cs-doped CH_(3)NH_(3)PbI_(3)(MAPbI_(3)) films and planar heterojunction devices under proton irradiation up to 1×10^(16)p cm^(-2) were studied.5%of Cs^(+) doping can increase the cohesive energy of MAPbI_(3)and effectively alleviate the lattice strain induced by proton irradiation,thereby enhancing the crystallinity and stability of *** bandgap changes of irradiated Cs_(0.05)MA_(0.95)PbI_(3) films under the identical fluence were only one third of that of MAPbI_(3) *** irradiation under the fluence of 1×10^(14)p cm^(-2),the density of trap states in the undoped and 5%Cs-doped films increased by 71%and 9%,respectively,and the average PCE of 20 corresponding devices decreased only by 12%and 9%,*** proves that the replacement of organic methylamine ion with inorganic cesium ion contributes to the improvement of MAPbI_(3) resistance to proton irradiation,thus confirming the application prospects of mixed-cation or all-inorganic perovskite solar cells in spacecraft.

关键词： Proton irradiation Perovskite solar cells Cesium doping Irradiation resistance

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Photoacoustic microscopy based on transparent piezoelectric ultrasound transducers

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Journal of Innovative Optical Health sciences 2023年第5期16卷 77-92页

作者： Hangbing Peng Zhongwen Cheng Lvming Zeng Xuanrong Ji State Key Laboratory of Precision Electronics Manufacturing Technology and Equipment Guangdong University of Technology Guangzhou 510006 China Key Lab of Optic-Electronic and Communication Jiangxi Science and Technology Normal University Nanchang 330038 China

Photoacoustic microscopy(PAM),due to its deep penetration depth and high contrast,is playing an increasingly important role in biomedical *** imaging systems equipped with conventional ultrasound transducers have demonstrated excellent imaging ***,these opaque ultrasonic transducers bring some constraints to the further development and application of PAM,such as complex optical path,bulky size,and difficult to integrate with other *** overcome these problems,ultrasonic transducers with high optical transparency have *** present,transparent ultrasonic transducers are divided into optical-based and acoustic-based *** this paper,we mainly describe the acoustic-based piezoelectric transparent transducers in detail,of which the research advances in PAM applications are *** addition,the potential challenges and developments of transparent transducers in PAM are also demonstrated.

关键词： Photoacoustic microscopy transparent ultrasound transducer LiNbO_(3) PMN-PT PVDF CMUT

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飞秒激光-化学混合制备多基底超疏水表面

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Journal of Central South University 2024年第1期31卷 1-10页

作者：翁伟轩邓钦文杨鹏宇银恺 Hunan Key Laboratory of Nanophotonics and Devices School of PhysicsCentral South UniversityChangsha 410083China State Key Laboratory of Precision Manufacturing for Extreme Service Performance College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083China State Key Laboratory of Intelligent Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430000China

超疏水表面因具有多种功能和广泛的应用引起了人们极大的兴趣。目前制备超疏水表面的方法大多只适用于一种或几种特定的基底材料,具有依赖基底的缺点。本文提出了一种基于飞秒激光-化学混合加工制备与基底无关的超疏水表面的方法。通过... 详细信息

超疏水表面因具有多种功能和广泛的应用引起了人们极大的兴趣。目前制备超疏水表面的方法大多只适用于一种或几种特定的基底材料,具有依赖基底的缺点。本文提出了一种基于飞秒激光-化学混合加工制备与基底无关的超疏水表面的方法。通过飞秒激光直接写入技术在基底上构建出微/纳米结构,然后用硬脂酸改性。硬脂酸涂覆激光处理后的样品(LTx-SA,x表示不同的样品)表面具有优异的超疏水和自清洁性能。此外,值得注意的是,将基底从20℃加热到100℃,或清洗基板10次,或将基板暴露在空气中60 d后,LTx-SA表面仍然保持稳定的超疏水特性。这项工作为制备与基底无关的超疏水表面提供了一种有效而简单的策略。

关键词：飞秒激光硬脂酸多基底超疏水表面

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Bayesian Game-Based Comfort Trading Strategies for Temperature Regulation in Smart Grids 3

Bayesian Game-Based Comfort Trading Strategies for Temperatu...

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3rd IEEE Industrial Electronics Society Annual On-Line Conference, ONCON 2024

作者： Wang, Xiaocheng Sun, Pengjiao Wang, Na Guo, Jia College of Electronic and Communication Engineering Tianjin Normal University Tianjin Key Laboratory of Wireless Mobile Communications and Power Transmission Tianjin China Wu Yue Aviation Technology Precision Manufacturing Co. Ltd. Tianjin China

ISBN: (纸本)9798331540319

This paper proposes a Heating, Ventilating, and Air Conditioning (HVAC) comfort-level trading model designed to incentivize HVAC systems to provide more Frequency Regulation Service (FRS) for the smart grid. The model first categorizes HVAC systems into two layers: a leader layer with low comfort adjustment levels and a follower layer with high comfort adjustment levels. A Stackelberg game is then established between the leader and follower layers to optimize customer utility. Simultaneously, a Bayesian game model is developed for the HVAC systems in the follower layer, which aims to maximize the utility of customers while enabling the leader layer to provide regulatory services. Finally, simulation results demonstrate that the proposed comfort trading model effectively keeps HVAC temperature setpoints within acceptable comfort ranges and enhances customer satisfaction. © 2024 IEEE.

关键词： Sales

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Adaptive wavefront interferometry for large surface figure error utilizing convolutional neural networks 7

Adaptive wavefront interferometry for large surface figure e...

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7th Global Intelligent Industry Conference, GIIC 2024

作者： Wang, Linfeng Xie, Zikang Mao, Yunfeng Liu, Junfeng Xue, Shuai Chen, Shanyong Dai, Yifan Liu, Yong College of Intelligence Science and Technology National University of Defense Technology Hunan Changsha410073 China Hunan Key Laboratory of Ultra-Precision Machining Technology Hunan Changsha410073 China Laboratory of Science and Technology on Integrated Logistics Support National University of Defense Technology Hunan Changsha410073 China State Key of High Performance Complex Manufacturing Central South University Hunan Changsha410073 China

ISBN: (纸本)9781510682986

In order to solve the problems of large surface figure errors in large value, high spatial frequency and multi-aberration modes which are beyond the dynamic range of the interferometer, and the problems of slow iterative convergence and high non-convergence rate of existing adaptive compensation optimization algorithm, an adaptive wavefront interferometry utilizing convolutional neural network(CNN) for large surface figure error is proposed, based on the existing adaptive compensation interference detection methods. This paper first introduces the aberration regulation principle of spatial light modulator (SLM), and sets up a convolutional neural network. Then, SLM is controlled to generate Zernike aberrations with different coefficients. Combined with Zygo Verifire interferometer, the corresponding far-field light intensity is collected to compose a labeled data set to train CNN. Finally, a large surface figure error coefficient prediction experiment is carried out with the trained CNN, and the aberration compensation is performed according to the prediction coefficient to verify the effectiveness of the method. The experimental results show that the dense fringes can be transformed into resolvable fringes with this method, and the resolvable probability of full-diameter fringes after compensation is 66.7%. This method is able to greatly improve the performance of adaptive compensation detection, thereby meeting the demand for high dynamic range interference detection technology in the ultra-precision optical surface manufacturing process. © 2024 SPIE.

关键词： Light modulation

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A novel approach of jet polishing for interior surface of small-grooved components using three developed setups

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极端制造(英文) 2024年第2期6卷 426-446页

作者： Qinming Gu Zhenyu Zhang Hongxiu Zhou Jiaxin Yu Dong Wang Junyuan Feng Chunjing Shi Jianjun Yang Junfeng Qi State Key Laboratory of High-performance Precision Manufacturing Dalian University of TechnologyDalian 116024People's Republic of China School of Energy and Power Engineering Dalian University of TechnologyDalian 116024People's Republic of China Key Laboratory of Testing Technology for Manufacturing Process Ministry of EducationSouthwest University of Science and TechnologyMianyang 621010People's Republic of China State Key Laboratory of High-performance Precision Manufacturing Dalian University of TechnologyDalian 116024People's Republic of China Beijing Spacecraft Manufacturing Co. LtdChina Academy of Space TechnologyBeijing 100094People's Republic of China School of Mechanical Engineering Hangzhou Dianzi UniversityHangzhouZhejiangPeople's Republic of China Facility Design and Instrumentation Institute China Aerodynamics Research and Development Center(CARDC)Mianyang 621000People's Republic of China Beijing Spacecraft Manufacturing Co. LtdChina Academy of Space TechnologyBeijing 100094People's Republic of China

It is a challenge to polish the interior surface of an additively manufactured component with complex structures and groove sizes less than 1 *** polishing methods are disabled to polish the component,meanwhile keeping the structure *** overcome this challenge,small-grooved components made of aluminum alloy with sizes less than 1 mm were fabricated by a custom-made printer.A novel approach to multi-phase jet(MPJ)polishing is proposed,utilizing a self-developed polisher that incorporates solid,liquid,and gas *** contrast,abrasive air jet(AAJ)polishing is recommended,employing a customized polisher that combines solid and gas *** jet polishing,surface roughness(Sa)on the interior surface of grooves decreases from pristine 8.596 μm to 0.701 μm and 0.336 μm via AAJ polishing and MPJ polishing,respectively,and Sa reduces 92％and 96％,***,a formula defining the relationship between linear energy density and unit defect volume has been *** optimized parameters in additive manufacturing are that linear energy density varies from 0.135 J mm-1 to 0.22 J *** unit area defect volume achieved via the optimized parameters decreases to 1/12 of that achieved via non-optimized *** fluid dynamics simulation results reveal that material is removed by shear stress,and the alumina abrasives experience multiple collisions with the defects on the heat pipe groove,resulting in uniform material *** is in good agreement with the experimental *** novel proposed setups,approach,and findings provide new insights into manufacturing complex-structured components,polishing the small-grooved structure,and keeping it unbroken.

关键词： aluminum alloy abrasive air jet polishing multi-phase jet polishing interior curved surface small-grooved component

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