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Stability analysis of a liquid crystal elastomer self-oscillator under a linear temperature field

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Applied Mathematics and Mechanics(English Edition) 2024年第2期45卷 337-354页

作者： Haiy.ng WU Jiangfeng LOU biao ZHAng yuntong DAI Kai LI School of Civil Engineering Anhui Jianzhu UniversityHefei 230601China

Self-oscillating systems abound in the natural world and offer substantial potential for applications in controllers,micro-motors,medical equipments,and so ***,numerical methods have been widely utilized for obtaining the characteristics of self-oscillation including amplitude and ***,numerical methods are burdened by intricate computations and limited precision,hindering comprehensive investigations into self-oscillating *** this paper,the stability of a liquid crystal elastomer fiber self-oscillating system under a linear temperature field is studied,and analytical solutions for the amplitude and frequency are ***,we establish the governing equations of self-oscillation,elucidate two motion regimes,and reveal the underly.ng ***,we conduct a stability analysis and employ a multi-scale method to obtain the analytical solutions for the amplitude and *** results show agreement between the multi-scale and numerical *** research contributes to the examination of diverse self-oscillating systems and advances the theoretical analysis of self-oscillating systems rooted in active materials.

关键词： self-oscillation stability analysis multi-scale method liquid crystal elastomer linear temperature field

Metal–Organic Framework‑Based Photodetectors

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Nano-Micro Letters 2024年第11期16卷 675-703页

作者： Jin‑biao Zhang yi‑Bo Tian Zhi‑Gang Gu Jian Zhang State Key Laboratory of Structural Chemistry Structure of MatterFujian Institute of ResearchChinese Academy of SciencesFuzhouFujian 350002People’s Republic of China College of Chemistry and Materials Science Fujian Nornal UniversityFuzhou 350007FujianPeople’s Republic of China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108FujianPeople’s Republic of China University of Chinese Academy of Science Beijing 100049People’s Republic of China

The unique and interesting physical and chemical properties of metal–organic framework(MOF)materials have recently attracted extensive attention in a new generation of photoelectric *** this review,we summarized and discussed the research progress on MOF-based *** methods of preparing MOF-based photodetectors and various types of MOF single crystals and thin film as well as MOF composites are introduced in ***,the photodetectors applications for X-ray,ultraviolet and infrared light,biological detectors,and circularly polarized light photodetectors are ***,summaries and challenges are provided for this important research field.

关键词： Metal-organic frameworks Semiconductor Photodetectors

Bioinspired directional structures for inhibiting wetting on super-melt-philic surfaces above 1200°C

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International Journal of Extreme Manufacturing 2024年第4期6卷 337-346页

作者： Hujun Wang Xiuyuan Zhao Zhengcan Xie biao y.ng Jing Zheng Kai yin Zhongrong Zhou Tribology Research Institute State Key Laboratory of Rail Transit Vehicle SystemSchool of Mechanical EngineeringSouthwest Jiaotong UniversityChengdu 610031People's Republic of China Hunan Key Laboratory of Nanophotonics and Devices School of PhysicsCentral South UniversityChangsha 410083People's Republic of China

Over the past two decades,superhydrophobic surfaces that are easily created have aroused considerable attention for their superior performances in various applications at room ***,there is a growing demand in special fields for the development of surfaces that can resist wetting by high-temperature molten droplets(>1200°C)using facile design and fabrication ***,bioinspired directional structures(BDSs)were prepared on y2O3-stabilized ZrO2(ySZ)surfaces using femtosecond laser *** from the anisotropic energy barriers,the BDSs featured with no additional modifiers showed a remarkable increase from 9.2°to 60°in the contact angle of CaO–MgO–Al2O3–SiO2(CMAS)melt and a 70.1%reduction in the spreading area of CMAS at 1250°C,compared with polished super-CMAS-melt-philic ySZ ***,the BDSs demonstrated exceptional wetting inhibition even at 1400°C,with an increase from 3.3°to 31.3°in contact angle and a 67.9%decrease in spreading *** work provides valuable insight and a facile preparation strategy for effectively inhibiting the wetting of molten droplets on super-melt-philic surfaces at extremely high temperatures.

关键词： directional structures bioinspired design inhibiting wetting super-melt-philic superhydrophobic

XOR spin logic operated by unipolar current based on field-free spin-orbit torque switching induced by a lateral interface

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Rare Metals 2024年第8期43卷 3868-3875页

作者： yan-Ru Li Mei-yin y.ng Guo-Qiang yu Bao-Shan Cui Jin-biao Liu y.ng-Liang Li Qi-Ming Shao Jun Luo Key Laboratory of Microelectronic Devices and Integrated Technology Institute of MicroelectronicsChinese Academy of Sciences(IMECAS)Beijing 100029China University of Chinese Academy of Sciences(UCAS) Beijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China Institute of Physics Chinese Academy of SciencesBeijing 100190China Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education Lanzhou UniversityLanzhou 730000China Department of Electronic and Computer Engineering The Hong Kong University of Science and TechnologyHong Kong 999077China

Spin logics have emerged as a promising avenue for the development of logic-in-memory *** particular,the realization of XOR spin logic gates using a single spin-orbit torque device shows great potential for low-power stateful logic circuits in the next *** this study,we successfully obtained the XOR logic gate by utilizing a spin-orbit torque device with a lateral interface,which was created by local ion implantation in the Ta/Pt/Co/Ta Hall device exhibiting perpendicular magnetic *** angle of the lateral interface is set at 45°relative to the current direction,leading to the competition between symmetry breaking and current-driven Néel-type domain wall ***,the field-free magnetic switching reversed is realized by the same sign of current amplitude at this *** on this field-free magnetic switching behavior,we successfully proposed an XOR logic gate that could be implemented using only a single spin-orbit torque Hall *** study provides a potentially viable approach toward efficient spin logics and in-memory computing architectures.

关键词： Filed-free magnetic switching Spin-orbit torque XOR logic gate Lateral interface

Injectable Nanorobot-Hydrogel Superstructure for Hemostasis and Anticancer Therapy of Spinal Metastasis

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Nano-Micro Letters 2024年第12期16卷 59-80页

作者： Qing Chen Miao yan Annan Hu Bing Liang Hongwei Lu Lei Zhou yiqun Ma Chao Jia Dihan Su biao Kong Wei Hong Libo Jiang Jian Dong Department of Orthopaedic Surgery Zhongshan HospitalFudan UniversityShanghai 200032People’s Republic of China Department of Chemistry Fudan UniversityShanghai 200438People’s Republic of China Department of Surgery Yong Loo Lin School of MedicineNational University of Singapore1E Kent Ridge RoadSingapore 119228Singapore Department of Geriatrics and Gerontology Huadong HospitalFudan UniversityShanghai 200438People’s Republic of China State Key Laboratory of Molecular Engineering of Polymers Fudan UniversityShanghai 200438People’s Republic of China Department of Orthopaedic Surgery Zhongshan Hospital Wusong Branch Fudan UniversityShanghai 200940People’s Republic of China

Surgery remains the standard treatment for spinal ***,uncontrolled intraoperative bleeding poses a significant challenge for adequate surgical resection and compromises surgical *** this study,we develop a thrombin(Thr)-loaded nanorobothydrogel hybrid superstructure by incorporating nanorobots into regenerated silk fibroin nanofibril *** superstructure with superior thixotropic properties is injected percutaneously and dispersed into the spinal metastasis of hepatocellular carcinoma(HCC)with easy bleeding characteristics,before spinal surgery in a mouse *** near-infrared irradiation,the self-motile nanorobots penetrate into the deep spinal tumor,releasing Thr in a controlled ***-induced thrombosis effectively blocks the tumor vasculature and reduces bleeding,inhibiting tumor growth and postoperative recurrence with Au nanorod-mediated photothermal *** minimally invasive treatment platform provides a novel preoperative therapeutic strategy for HCC spinal metastasis effectively controlling intraoperative bleeding and tumor growth,with potentially reduced surgical complications and enhanced operative outcomes.

关键词： Silk fibroin Nanofibril hydrogels Nanorobots Thrombin Spinal metastasis

Optimize Purcell filter design for reducing influence of fabrication variation

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Chinese Physics B 2024年第6期33卷 589-594页

作者：蔡晓周翼彪于文龙熊康林冯加贵 Gusu Laboratory of Materials Suzhou 215123China Suzhou Institute of Nano-Tech and Nano-Bionics Chinese Academy of SciencesSuzhou 215123China

To protect superconducting qubits and enable rapid readout, optimally designed Purcell filters are essential. To suppress the off-resonant driving of untargeted readout resonators, individual Purcell filters are used for each readout ***, achieving consistent frequency between a readout resonator and a Purcell filter is a significant challenge. A systematic computational analysis is conducted to investigate how fabrication variation affects filter performance, through focusing on the coupling capacitor structure and coplanar waveguide(CPW) transmission line specifications. The results indicate that the T-type enclosing capacitor(EC), which exhibits lower structural sensitivity, is more advantageous for achieving target capacitance than the C-type EC and the interdigital capacitor(IDC). By utilizing a large-sized CPW with the T-type EC structure, fluctuations in the effective coupling strength can be reduced to 10%, given typical micro-nanofabrication variances. The numerical simulations presented in this work minimize the influence of fabrication deviations, thereby significantly improving the reliability of Purcell filter designs.

关键词： superconducting circuit Purcell filter coplanar waveguide capacitor structure

选区激光熔化成形钛合金薄壁件热行为及打印极限高度研究

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塑性工程学报 2024年第7期31卷 114-123页

作者：彭凯蔡高参胡彪浙江理工大学机械工程学院浙江杭州310018

为了研究钛合金薄壁件在选区激光熔化工艺下的热行为及工艺参数对打印极限高度的影响,采用理论建模、模拟仿真和正交试验法等手段开展了钛合金薄壁件在复杂热循环作用下的热行为及打印极限高度研究。分别从单层单道、单层多道和多层单... 详细信息

为了研究钛合金薄壁件在选区激光熔化工艺下的热行为及工艺参数对打印极限高度的影响,采用理论建模、模拟仿真和正交试验法等手段开展了钛合金薄壁件在复杂热循环作用下的热行为及打印极限高度研究。分别从单层单道、单层多道和多层单道展开研究。模拟结果表明,对于单层单道成形,当激光束从节点N1移动到节点N3时,熔池峰值温度和最大冷却速率逐渐增加;对于单层多道成形,当激光束从第1道扫描至第3道时,熔池尺寸和熔池峰值温度呈递增趋势;对于多层单道成形,当激光束从第1层扫描至第5层时,熔池尺寸呈递增趋势。试验结果表明,打印极限高度与激光功率成正相关,与扫描速度呈负相关,随着扫描间距的增加先增加后减小,且与激光能量密度呈线性增长趋势。

关键词：选区激光熔化增材制造薄壁件热行为打印极限高度

基于视觉与激光雷达的输电线路无人机自动化巡检控制

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自动化与仪表 2024年第7期39卷 37-41页

作者：熊彪深圳供电局有限公司深圳518000

为了使无人机快速到达指定位置,提高输电线路巡检效率,该文提出了基于视觉与激光雷达的输电线路无人机自动化巡检控制方法。利用光流传感器获取无人机巡检速度信息,通过激光雷达与IMU分别确定无人机高度信息及姿态信息,采用扩展卡尔曼... 详细信息

为了使无人机快速到达指定位置,提高输电线路巡检效率,该文提出了基于视觉与激光雷达的输电线路无人机自动化巡检控制方法。利用光流传感器获取无人机巡检速度信息,通过激光雷达与IMU分别确定无人机高度信息及姿态信息,采用扩展卡尔曼滤波器对各传感器数据融合,完成无人机巡检速度的预估,根据多传感器数据融合结果,设计基于PID的串联双环控制器,实现无人机巡检定高、定点位置控制。实验结果表明,该方法可实现多传感器数据融合,降低无人机巡检干扰,使其以相对平稳速度巡检;可实现无人机巡检控制,X、y方向上的位置曲线与实际结果基本一致,位置误差较小;巡检过程中,无人机仰俯角、横滚角误差低于1°。

关键词：激光雷达输电线路无人机巡检控制 IMU 扩展卡尔曼滤波

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“五育”融合背景下小学劳动教育的实施路径

教学与管理 2024年第3期 99-103页

作者：王琳田夏彪大理大学教师教育学院云南大理671003

“五育”融合即通过融合的形式实现个体德智体美劳全面均衡发展的教育,“五育”融合是一种教育理念,也是一种教育策略,更是一种育人能力,是对新时代“如何培养人”这一教育根本问题的科学回答。劳动是创造物质财富和精神财富的主要路径... 详细信息

“五育”融合即通过融合的形式实现个体德智体美劳全面均衡发展的教育,“五育”融合是一种教育理念,也是一种教育策略,更是一种育人能力,是对新时代“如何培养人”这一教育根本问题的科学回答。劳动是创造物质财富和精神财富的主要路径,是人类特有的基本社会实践活动,在“五育”之中,劳动教育被认为具有树德、增智、强体、育美的综合协调育人价值,是“五育”的主要突破口和“五育”融合教育的关键所在,劳动教育是融通五育的粘合剂,劳动教育需与其余四育建立有机链接,形成融合互动,谋求与生活实践的紧密结合,努力构建德智体美劳全面培养的教育体系,形成更高水平的人才培养体系。

关键词： “五育”融合小学劳动教育劳动