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Prediction and Regulation of Delamination at Flexible Film/Finite-Thickness-Substrate Structure Interfaces

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Acta Mechanica Solida Sinica 2024年第2期37卷 238-251页

作者： Yutang Zhou Yunlong Xu haoran gong Chenyu Wang Department of Engineering Mechanics Northwestern Polytechnical UniversityXi’an710072China School of Instrumentation Science and Opto-Electronics Engineering Beihang UniversityBeijing100191China

Regulating the surface instability of thin film/substrate structures has been successfully applied to prepare new ductile electronic ***,such electronic devices need to be subjected to external loads during operation,which can easily induce delamination of the thin-film electronic device from the *** study aims to investigate the instability characteristics of hard films on flexible substrate surfaces from theoretical analysis and numerical simulation *** finite-thickness substrates,this paper establishes theoretical models for pure bending,bent wrinkle,partial delamination,and total delamination buckling of film/substrate structures based on the nonlinear Euler–Bernoulli beam theory and the principle of minimum energy;then the effects of material and geometric parameters of the structure,interfacial adhesion strength,and pre-strain on the evolutionary path of the four patterns are *** study results show that:the greater Young’s modulus of the substrate is,the larger the parameter region where partial delamination of the film/substrate structure occurs,and the smaller the parameter region where bent wrinkle *** varying Young’s modulus,thickness of the film and substrate,interfacial adhesion coefficient,and pre-strain,the buckling pattern of the structure can be predicted and *** parametric design intervals for each pattern are summarized in the phase *** results of this paper provide theoretical support for the design and reliability evaluation of flexible electronic devices.

关键词： Thin film/finite-thickness-substrate structure Delamination Surface instability Pattern evolution

On-orbit attitude planning for Earth observation imaging with star-based geometric calibration

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Science China Technological Sciences 2025年

作者： Di HUANG Zhifu WANG Jianya gong haoran JI Institute of Aerospace Science and Technology School of Remote Sensing and Information Engineering Wuhan University State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing School of Remote Sensing and Information Engineering Wuhan University National Key Laboratory of Air-based Information Perception and Fusion Intelligent Game and Decision Laboratory

To improve the quality of remote sensing images, a novel on-orbit attitude planning method for Earth observation imaging with star-based geometric calibration is presented in this study. Unlike traditional imaging processes, the proposed method includes both pre-calibration and post-calibration stages to enhance the accuracy of satellite geometric positioning. A multiple-constraint attitude planning algorithm was developed to ensure star-based calibration, wherein the satellite camera and star sensors simultaneously capture the images of stars. This integration of cameras and multiple star sensors enables effective attitude determination. During the Earth imaging stage, a fast on-orbit attitude planning algorithm was developed to determine the satellite attitude and the optimal imaging times for ground targets. Compared with existing methods, the fast on-orbit attitude planning algorithm can significantly reduce computational time and resource consumption via initial value selection and *** demonstrate the effectiveness of the proposed attitude planning method, which was successfully applied to Wuhan 1satellite.

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用于高风险环境安全监测和可调热管理的具有分层核壳结构的耐化学品纱线

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Engineering 2024年第1期32卷 217-225页

作者： Duo Xu Yingcun Liu Can Ge Chong Gao Ze Chen Ziyi Su haoran gong Weilin Xu Jian Fang College of Textile and Clothing Engineering Soochow UniversitySuzhou 215123China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200China

Chemical resistant textiles are vital for safeguarding humans against chemical hazards in various *** as industrialproduction,chemicalaccidents,laboratory activities,and road ***,the ideal integration of chemical resistance,thermal and moisture management,and wearer condition monitoring in conventional chemically protective textiles remains ***,the design,manufacturing,and use of stretchable hierarchical core-shell yarns(HCSYs)for integrated chemical resistance,moisture regulation,and smart sensing textiles are *** yarns con-tain helically elastic spandex,wrapped silver-plated nylon,and surface-structuredpolytetrafluo-roethylene(PTFE)yarns and are designed and manufactured based on a scalable fabrication *** addition to their ideal chemical resistance performance,HCSYs can function as multifunctional stretch-able electronics for real-time human motion monitoring and as the basic element of intelligent ***,a desirable dynamic thermoregulation function is achieved by exploiting the fabric structure with stretching *** HCSYs may provide prospective opportunities for the future development of smart protective textiles with high durability,flexibility,and scalability.

关键词： Hierarchical core-shell structure Chemical resistant yam Wearable strain sensor Thermoregulation

开放叙事、符号意指与现实喜剧:阿基·考里斯马基创作与芬兰电影的发展方向

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电影评介 2022年第21期 66-69页

作者：宫浩然韩国世宗大学南京传媒学院

从20世纪初开始拍摄电影以来,芬兰的电影产量受文化产业发展滞后的影响,始终不尽人意。80年代以来,芬兰电影的平均年产量为10部上下。正是在这个人口仅有一百多万的国家,诞生了世界上较为盛名的现实主义喜剧电影大师阿基·考里斯马基。... 详细信息

从20世纪初开始拍摄电影以来,芬兰的电影产量受文化产业发展滞后的影响,始终不尽人意。80年代以来,芬兰电影的平均年产量为10部上下。正是在这个人口仅有一百多万的国家,诞生了世界上较为盛名的现实主义喜剧电影大师阿基·考里斯马基。这位集布列松、小津安二郎、法斯宾德等电影大师的风格于一身的芬兰导演引领了芬兰新浪潮电影,被瑞典名导英格玛·伯格曼誉为“北欧最具大师潜质的导演”[1]。

关键词：小津安二郎新浪潮电影法斯宾德电影大师喜剧电影布列松英格玛·伯格曼阿基·考里斯马基

喷射沉积SiC_p/6066铝基复合材料的固溶温度

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金属热处理 2000年第6期25卷 15-16页

作者：龚浩然黎文献中南工业大学材料科学与工程系湖南长沙410083

研究了喷射沉积体积分数 1 0 % SiCp/60 66铝基复合材料的固溶温度。结果表明 ,Mg和Cu在界面的富集致使复合材料的固溶温度和过烧温度均低于基体合金。该复合材料的最佳固溶温度为 51 5℃ ,且在 540℃过烧。

关键词：喷射沉积复合材料固溶温度碳化硅铝基

The low-latitude sodium layer:comparative data from lidar observations at Hainan,China and São Paulo,Brazil

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Earth and Planetary Physics 2025年第1期9卷 39-53页

作者： Fang Wu Jing Jiao GuoTao Yang LiFang Du ZhengKuan Liu haoran Zheng JiXin Guo ShaoHua gong YaJun Zhu State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China Hainan National Field Science Observation and Research Observatory for Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China China-Brazil Joint Laboratory for Space Weather NSSC/INPESão Josédos Campos 12227-010Brazil School of Physics and Electronics Engineering Hainan Normal UniversityHaikou 571158China

Physical and chemical processes observed in the mesosphere and thermosphere above the Earth’s low latitudes are complex and highly interrelated to activity in the low-latitude *** sodium detected by lidar can yield clues to dynamic and chemical processes in these spatial layers above the Earth’s *** paper is based on sodium layer data collected at two low-latitude stations,one in the northern hemisphere and one in the *** low-latitude sodium layer exhibits conspicuous seasonal variations in shape,density,and altitude;these variations are similar between Earth’s hemispheres:sodium layer density at both stations reaches its seasonal maximum in autumn and minimum in ***,maximal Na density over Brazil is greater than that over *** variations of Na density above the two low-latitude stations are also similar;at both,maxima are observed before *** variations of the Na layer over Brazil that differ from those observed in the northern hemisphere may be related to the South Atlantic Magnetic Anomaly(SAMA)or fountain *** suggest that low-latitude Na layer data may provide useful additional evidence that could significantly improve the low-latitude part of the WACCM-Na model.

关键词： metallic sodium layer seasonal variation nocturnal variation lidar

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气射流破煤连续过程机理与数学模型

煤炭学报 2020年第9期45卷 3176-3185页

作者：宋鑫王公达马恒龚浩然崔聪辽宁工程技术大学安全科学与工程学院辽宁阜新123000 煤炭科学技术研究院有限公司安全分院北京100083 矿山热动力灾害与防治教育部重点实验室辽宁阜新123000 中国矿业大学(北京)应急管理与安全工程学院北京100083

针对水力化增透措施在松软低渗煤层应用过程中存在的水封抑制瓦斯解吸和降低煤体渗透率的缺陷,提出高压气射流冲孔破煤增透的技术方法,同时为明确气射流冲孔破煤的特性,基于空气动力学与岩石力学理论,分析了气射流破煤的连续过程机理,... 详细信息

针对水力化增透措施在松软低渗煤层应用过程中存在的水封抑制瓦斯解吸和降低煤体渗透率的缺陷,提出高压气射流冲孔破煤增透的技术方法,同时为明确气射流冲孔破煤的特性,基于空气动力学与岩石力学理论,分析了气射流破煤的连续过程机理,推导了连续过程数学模型并建立了破煤能力与破碎坑特征的判识准则。分析认为,高压气体经缩放型喷嘴实现超声速跃迁加速流动;自喷嘴喷出的气流在空气介质的剪切作用下,轴向速度衰减,径向断面扩张;当射流冲击作用于煤体后,产生破碎核和延展裂纹,在拉伸作用下发生失效破坏,形成塑性破碎坑。选取3种不同强度的煤体和1种砂岩进行的气射流破煤规律计算结果表明,当提高喷嘴入口压力和喷嘴直径时,气射流滞止点处压力均不断增大,在低压力入口条件下,气射流可对强度较小的煤体造成冲蚀破坏,当入口压力达到16 MPa时,可实现对砂岩的冲蚀破坏;随着射流压力的提高,冲蚀形成的破碎坑轴向深度和径向长度都不断增大,但轴向深度增加量要远大于径向长度增加量,破碎坑形状由最初的锥形渐变为橄榄球形。

关键词：气射流连续过程超声速流动射流冲击破碎坑

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用给定转角分步实现刚体任意有限转动的研究

力学与实践 2021年第3期43卷 343-346页

作者：巩浩然武迪龚胜平李俊峰清华大学航天航空学院北京100084 北京航空航天大学宇航学院北京100191

刚体的任意有限转动可以分解为3次绕指定转轴的定轴转动,但在实际应用中,可能出现难以绕某轴实现连续任意角度旋转的情况。本文探究的问题是,刚体的任意有限转动是否可以分解为几次旋转角大小给定、转轴方向任意的定轴转动,以及如何实... 详细信息

刚体的任意有限转动可以分解为3次绕指定转轴的定轴转动,但在实际应用中,可能出现难以绕某轴实现连续任意角度旋转的情况。本文探究的问题是,刚体的任意有限转动是否可以分解为几次旋转角大小给定、转轴方向任意的定轴转动,以及如何实现这种分解。本文以姿态四元数为主要工具,构造性地证明了上述分解的可行性,并给出了具体的分解方法。

关键词：姿态运动学旋转分解四元数

从“圣吾不见”到“涂人为禹”--荀子、孔子圣人观比较

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开封文化艺术职业学院学报 2022年第6期42卷 1-3页

作者：宫浩然曲阜师范大学孔子文化研究院山东曲阜273165

“圣人”是儒家的最高道德理想和完满人格,儒学本身即以希圣、成圣为最高精神追求的修身治世之学。在孔子那里,圣人是不可企及的超越性理想人格。在荀子看来,现实性的圣人可通过后天的努力积习仁义礼法而成。从“圣人,吾不得而见之矣”... 详细信息

“圣人”是儒家的最高道德理想和完满人格,儒学本身即以希圣、成圣为最高精神追求的修身治世之学。在孔子那里,圣人是不可企及的超越性理想人格。在荀子看来,现实性的圣人可通过后天的努力积习仁义礼法而成。从“圣人,吾不得而见之矣”到“涂之人可以为禹”,是荀子对孔子圣人观的现实性提升,凸显了儒家圣人观在先秦历史演进中愈加凡俗化、具象化的现实性维度,在此基础上完成了超越与现实的圆融、内圣与外王的贯通。

关键词：圣人观孔子荀子 “圣吾不见” “涂人为禹”