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Author Correction: High-performance Marangoni hydrogel rotors with asymmetric porosity and drag reduction profile (vol 14, 20, 2023)

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NATURE COMMUNICATIONS 2023年第1期14卷 1928-1928页

作者： Wu, Hao Chen, Yiyu Xu, Wenlong Xin, Chen Wu, Tao Feng, Wei Yu, Hao Chen, Chao Jiang, Shaojun Zhang, Yachao Wang, Xiaojie Duan, Minghui Zhang, Cong Liu, Shunli Wang, Dawei Hu, Yanlei Li, Jiawen Li, Erqiang Wu, HengAn Chu, Jiaru Wu, Dong CAS Key Laboratory of Mechanical Behavior and Design of Materials Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes Department of Precision Machinery and Precision Instrumentation University of Science and Technology of China Hefei 230027 China Key Laboratory of Testing Technology for Manufacturing Process of Ministry of Education Southwest University of Science and Technology Mianyang 621010 China Department of Modern Mechanics University of Science and Technology of China Hefei 230026 China Physical Intelligence Department Max Planck Institute for Intelligent Systems 70569 Stuttgart Germany

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Directional Rebound of Compound Droplets on Asymmetric Self-Grown Tilted Mushroom-Like Micropillars for Anti-Bacterial and Anti-Icing Applications

SSRN

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SSRN 2023年

作者： Yang, Yi Zhang, Yachao Li, Guoqiang Zhang, Miaoqi Song, Yuegan Liu, Sengyun Cai, Yong Wu, Dong Chu, Jiaru Hu, Yanlei Key Laboratory of Testing Technology for Manufacturing Process Ministry of Education Southwest University of Science and Technology Mianyang621010 China Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Mechanical Behavior and Design of Materials Key Laboratory of Precision Scientific Instrumentation Anhui Higher Education Institutes Department of Precision Machinery and Precision Instrumentation University of Science and Technology of China Hefei230027 China Key Laboratory of Icing and Anti/De-icing China Aerodynamics Research and Development Center Sichuan Mianyang621000 China

Directional liquid bouncing is of great significance for a variety of biological and industrial applications. Although surface engineering through 3D printing or self-assembly enables water droplets to rebound directionally, directional bouncing of compound droplets still poses a challenge due to their low surface tension. Moreover, preparation of superamphiphobic surfaces in an efficient and simple manner to accomplish this mission remains to be studied. Here, a tilted stepped mushroom-like micropillar surface (TSMMs), whose structural morphology can be created and tailored by a facile and direct femtosecond laser-induced asymmetric self-growing strategy, is designed to enable the oblique quasi-pancake bouncing of a low surface tension droplet (γ = 32 mN/m). Oblique quasi-pancake bouncing can not only reduce the droplet contact time (7 ms) but also effectively control the direction of droplet bouncing (the horizontal distance of 2.4 cm). Accompanying mechanistic analysis provides an in-depth understanding of the structure-droplet motion relationship. Finally, we demonstrate the applications of TSMMs in antibacterial and anti-icing scenarios. This work advances the investigation of directed droplet transportation, and paves new avenues in the fields of advanced biomedical and other industrial materials. © 2023, The Authors. All rights reserved.

关键词： Femtosecond lasers

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Sliding mode controller by using adaptive exponential reaching law based on nonlinear disturbance observer

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ISA Transactions 2025年

作者： Liu, Ying Li, Gongfa Du Jiang Yun, Juntong Tao, Bo Jiang, Guozhang Kong, Jianyi Chen, Baojia Key Laboratory of Metallurgical Equipment and Control Technology of Ministry of Education Wuhan University of Science and Technology Wuhan 430081 China Research Center for Biomimetic Robot and Intelligent Measurement and Control Wuhan University of science and Technology Wuhan 430081 China Hubei Key Laboratory of Mechanical Transmission and Manufacturing Engineering Wuhan University of science and Technology Wuhan 430081 China Precision Manufacturing Research Institute Wuhan University of Science and Technology Wuhan 430081 China Hubei Longzhong Laboratory Xiangyang 441000 China Hubei Key Laboratory of Hydroelectric Machinery Design& Maintenance China Three Gorges University Yichang 443002 China

Aiming at the position tracking control problem of flexible jointed manipulator in the uncertainties and external disturbances, this paper proposes an integrated nonlinear disturbance observer (NDOB) and a non-singular fast terminal sliding mode (NFTSM) control method based on adaptive exponential reaching law (AERL). The NDOB is designed to ensure that the time-varying disturbance is suppressed in finite time. The AERL is designed to improve the track tracking speed and reduce the chattering of the control input. Simulation results show that compared with the optimal ARL, the proposed method reduces the trajectory tracking error by 1.3 %, improves the trajectory tracking convergence speed. Experimental results show that the proposed method reduces the trajectory tracking error by 0.545 %. © 2025 ISA

关键词： AERL AERL-NFTSM Chattering Convergence accuracy Flexible jointed manipulator

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Effect mechanism of diamond content on tribo-chemical processing of sapphire wafers using developed clusters of diamond and ceria chemically agglomerated abrasive cluster

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Ceramics International 2025年

作者： Wang, Zhankui Huang, Shangci Liu, Kuncheng Zhao, Zhicheng Fan, Yihang Chen, Jiapeng Yao, Yunlong Pang, Minghua Ma, Lijie Su, Jianxiu School of Mechanical and Electrical Engineering Henan Institute of Science and Technology Henan Xinxiang453003 China School of Information Engineering Henan University of Science and Technology Henan Luoyang471000 China Research Center for Advanced Micro-/Nano- Fabrication Materials College of Chemistry and Chemical Engineering Shanghai University of Engineering Science Shanghai201620 China State Key Laboratory for High Performance Tools Zhengzhou Abrasive Grinding Research Institute Co. Ltd Henan 450001 China State Key Laboratory of Silicon and Advanced Semiconductor Materials Zhejiang University Hangzhou310027 China Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology National Key Laboratory of Science and Technology on Helicopter Transmission College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and Astronautics Nanjing210016 China

To enhance the material removal rate (MRR) and surface quality of sapphire wafers during lapping, this study proposes a new method for preparing chemically agglomerated abrasive clusters (CAAC). Using this method, five distinct CAAC abrasives, each with a different diamond content, were prepared for lapping experiments on sapphire wafers. MRR and surface roughness Ra were used as evaluation indicators to elucidate the removal behavior of CAAC abrasive particles during the lapping of sapphire wafers. The study analyzed changes in the friction curve, the elemental composition of the sapphire surface before and after lapping, and the microscopic morphology of the CAAC abrasives. The results indicate that #4 CAAC demonstrates the highest MRR and favorable surface quality among the tested variants. Specifically, #4 CAAC achieved the highest removal rate of 380.267 nm/min and the lowest surface roughness of 33.978 nm, outperforming #1, #2, #3, and #5 CAAC. Compared to W50 single crystalline diamond (W50 SCD) of equivalent grain size, the MRR increased by a factor of 3.1. Furthermore, within a certain range, the machining performance of CAAC improves with an increase in diamond content;however, both excessively high and low diamond contents negatively impact overall performance. When the diamond content in CAAC reaches 42 %, machinability is optimized. This method enhances the processing efficiency of sapphire wafers, improves surface quality, and offers innovative approaches for efficient and cost-effective sapphire wafer processing. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Chemically agglomerated abrasives cluster Diamond Lapping Sapphire

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Additive manufacturing of promising heterostructure for biomedical applications

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International Journal of Extreme manufacturing 2023年第3期5卷 363-405页

作者： Cijun Shuai Desheng Li Xiong Yao Xia Li Chengde Gao State Key Laboratory of Precision Manufacturing for Extreme Service Performance College of Mechanical and Electrical EngineeringCentral South UniversityChangsha 410083People’s Republic of China Institute of Additive Manufacturing Jiangxi University of Science and TechnologyNanchang 330013People’s Republic of China Research Center for Macromolecules and Biomaterials National Institute for Materials Science(NIMS)1-1NamikiTsukubaIbaraki 305-0044Japan

As a new generation of materials/structures,heterostructure is characterized by heterogeneous zones with dramatically different mechanical,physical or chemical *** endows heterostructure with unique interfaces,robust architectures,and synergistic effects,making it a promising option as advanced biomaterials for the highly variable anatomy and complex functionalities of individual ***,the main challenges of developing heterostructure lie in the control of crystal/phase evolution and the distribution/fraction of components and *** recent years,additive manufacturing techniques have attracted increasing attention in developing heterostructure due to the unique flexibility in tailored structures and synthetic *** review focuses on the additive manufacturing of heterostructure for biomedical *** structural features and functional mechanisms of heterostructure are *** typical material systems of heterostructure,mainly including metals,polymers,ceramics,and their composites,are *** the resulting synergistic effects on multiple properties are also systematically discussed in terms of mechanical,biocompatible,biodegradable,antibacterial,biosensitive and magnetostrictive ***,this work outlines the research progress of additive manufacturing employed in developing heterostructure from the aspects of advantages,processes,properties,and *** review also highlights the prospective utilization of heterostructure in biomedical fields,with particular attention to bioscaffolds,vasculatures,biosensors and ***,future research directions and breakthroughs of heterostructure are prospected with focus on their more prospective applications in infection prevention and drug delivery.

关键词： additive manufacturing heterostructure synergistic effects integrated properties biomedical applications

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Effect of the Withdrawal Rate on the Microstructure and Elemental Segregation of the Directionally Solidified Nickel-Based Superalloy DZ125l

SSRN

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SSRN 2025年

作者： Liu, Wenshuai Wang, Haitao Chen, Ming Wu, Shiliang School of Mechanical Engineering and Automation University of Science and Technology Liaoning Anshan114051 China School of Mechanical and Electrical Engineering Shenzhen Polytechnic University Shenzhen518055 China State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment School of Electromechanical Engineering Guangdong University of Technology Guangzhou510006 China

In the directional solidification process, the withdrawal rate influences the cooling rates during alloy solidification. This study investigated the effects of controlling the withdrawal rate (50 μm/s, 60 μm/s, 70 μm/s, 80 μm/s, and 100 μm/s) on the directional solidification of the nickel-based superalloy DZ125L through experiments using the liquid metal cooling (LMC) method. The results revealed that with an increase in withdrawal rate, both the primary and secondary dendrite arm spacings of the alloy gradually decreased, and the deviation in grain growth orientation from diminished. As the withdrawal rate increased, the morphology of the γ' phase transitioned gradually from a disordered to a cubic form, and both the dendritic arm and intradendritic γ' phases diminished. As the withdrawal rate increased, the morphology of the γ' phase transitioned gradually from a disordered to a cubic form, and both the dendritic arm and intradendritic γ' phases diminished. An increase in withdrawal rate resulted in an intensified segregation of Ti, Ta, and C elements, while the segregation of W elements decreased. The average diameter and area fraction of carbides increased with the increasing withdrawal rate. The average diameter of the γ/γ' eutectic decreased, and its area fraction increased, which correlates with the segregation extent of the constituent elements in the precipitates. Moreover, the shapes of carbides and γ/γ' eutectics elongated gradually as the withdrawal rate increased, due to the reduction in dendrite spacing, which concentrated carbides and γ/γ' eutectics primarily between dendrites, elongating their growth space. © 2025, The Authors. All rights reserved.

关键词： Nickel alloys

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Progress of Research on Extraction, Function and Application of Moringa oleifera Polyphenols

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science and technology of Food Industry 2024年第19期45卷 415-423页

作者： Wang, Wenjing Hu, Xia Bai, Yuying Zhang, Li Su, Min Pan, Yuexiu Xie, Jing Tian, Yang College of Food Science and Technology Yunnan Agricultural University Kunming650201 China Engineering Research Center of Development Utilization of Food and Drug Homologous Resources Ministry of Education Kunming650201 China National Research and Development Professional Center for Moringa Processing Technology Kunming650201 China Yunnan Provincial Key Laboratory of Precision Nutrition and Personalized Food Manufacturing Kunming650201 China

Moringa oleifera is a perennial medicinal and edible plant, and polyphenols as one of its main active ingredients. This study reviews the current status of development of the polyphenol types and contents of different parts, polyphenol extraction methods, polyphenol efficacy, and polyphenol applications of Moringa oleifera. Additionally, the current research on the antioxidant, anti-inflammatory, antibacterial, antiviral, anticancer, and hypoglycemic properties of polyphenols from Moringa oleifera is critically examined. The aim of this review is to provide a theoretical basis as well as new insights into the future research and applications of Moringa oleifera polyphenols. © The Author(s) 2024.

关键词： Food ingredients

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Controlled growth of a single carbon nanotube on an AFM probe

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Microsystems & Nanoengineering 2021年第5期7卷 97-103页

作者： Biyao Cheng Shuming Yang Wei Li Shi Li Shareen Shafique Dong Wu Shengyun Ji Yu Sun Zhuangde Jiang State Key Laboratory for Manufacturing Systems Engineering Xi'an Jiaotong UniversityXi'an 710049China National Institute of Metrology Beijing 102200China Department of Precision Machinery and Precision Instrumentation University of Science and Technology of ChinaAnhui 230027China Department of Mechanical and Industrial Engineering University of TorontoTorontoOntario M5S 3G8Canada

Carbon nanotubes(CNTs)can be used as atomic force microscopy(AFM)tips for high-resolution scanning due to their small diameter,high aspect ratio and outstanding wear ***,previous approaches for fabricating CNT probes are complex and poorly *** this paper,we introduce a simple method to selectively fabricate a single CNT on an AFM tip by controlling the trigger threshold to adjust the amount of growth solution attached to the *** yield rate is over 93%.The resulting CNT probes are suitable in length,without the need for a subsequent cutting *** used the CNT probe to scan the complex nanostructure with a high aspect ratio,thereby solving the long-lasting problem of mapping complex nanostructures.

关键词： thereby attached carbon

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Modelling and Optimization Method for Energy Saving of Cnc Machine Tools Under Operating Condition

SSRN

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SSRN 2024年

作者： Wang, Liping Wei, Pengxuan Li, Weitao Du, Li School of Mechanical and Electrical Engineering University of Electronic Science and Technology of China Chengdu611731 China State Key Laboratory of Tribology Department of Mechanical Engineering Tsinghua University Beijing100084 China Beijing Key Lab of Precision/Ultra-precision Manufacturing Equipment and Control Beijing100084 China

The widespread application of machine tools in industry results in very high energy consumption. In order to save energy, it is an effective means to reduce the processing power while improving the processing efficiency of machine tools. Since milling parameters directly affect machine performance, the selection of suitable milling parameters is particularly important. In this regard, this study proposes an integrated modelling and optimization method for energy saving of CNC machine tools under operating condition. Firstly, the processing power and efficiency models of CNC machine tools under operating condition are established. Subsequently, the Pareto optimal solution is introduced to establish an optimization model integrating the processing power and time. To solve the optimization problem, an adaptive chaotic multi-objective chimp algorithm with fast convergence and satisfactory optimization is proposed considering three aspects: search space, convergence factor, and chaotic mapping. Finally, comparative analysis and validation are conducted through simulation cases and actual processing experiments, respectively. The results show that both validation scenarios have the same conclusion. Compared with three existing algorithms, the optimization results of the proposed method reduce the energy consumption by 58.21%, 45.54% and 41.45% through reducing the processing power and increasing the efficiency of machine tools, respectively. © 2024, The Authors. All rights reserved.

关键词： Energy utilization

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Normal Reference Attention and Defective Feature Perception Network for Surface Defect Detection

arXiv

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arXiv 2022年

作者： Luo, Wei Yao, Haiming Yu, Wenyong The State Key Laboratory of Digital Manufacturing Equipment and Technology School of Mechanical Science and Engineering Huazhong University of Science and Technology Wuhan430074 China The State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision Instrument Tsinghua University Beijing100084 China

Visual anomaly detection plays a significant role in the development of industrial automatic product quality inspection. As a result of the utmost imbalance in the amount of normal and abnormal data, growing attention has been given to unsupervised methods for defect detection. Although existing reconstruction-based methods have been widely studied recently, establishing a robust reconstruction model for various textured surface defect detection remains a challenging task due to homogeneous and nonregular surface textures. In this paper, we propose a novel unsupervised reconstruction-based method called the normal reference attention and defective feature perception network (NDP-Net) to accurately inspect a variety of textured defects. Unlike most reconstruction-based methods, our NDP-Net first employs an encoding module that extracts multi scale discriminative features of the surface textures, which is augmented with the defect discriminative ability by the proposed artificial defects and the novel pixel-level defect perception loss. Subsequently, a novel reference-based attention module (RBAM) is proposed to leverage the normal features of the fixed reference image to repair the defective features and restrain the reconstruction of the defects. Next, the repaired features are fed into a decoding module to reconstruct the normal textured background. Finally, the novel multi scale defect segmentation module (MSDSM) is introduced for precise defect detection and segmentation. In addition, a two-stage training strategy is utilized to enhance the inspection performance. The comprehensive experimental results indicate that the NDP-Net method achieves state-of-the-art inspection performance with an area under the receiver operating characteristic curve (ROCAUC) of 98.81% for defect detection and 98.54% for defect segmentation over all 5 textured surfaces on the MVTec AD dataset and 99.59% on 10 challenging texture surfaces on the DAGM dataset. Furthermore, NDP-Net also a

关键词： Textures

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