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Influence of Dislocation Pile-Up on Main Crack Propagation in Nanocrystals in the Hydrogen Environment

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Acta Mechanica Solida Sinica 2023年第6期36卷 851-859页

作者： Jiding Zhang Yue Sheng Hongda Yang jinbo wu Xiaoyu Jiang Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province School of Mechanics and Aerospace EngineeringSouthwest Jiaotong UniversityChengdu 610031China

The influence of material micro-defects on the main crack growth under pure shear loading is studied *** mechanism behind the initiation of micro-cracks and crack propagation induced by dislocation accumulation near the grain boundary(GB)ismainly considered,and the influence of dislocation accumulation on the main crack propagation is *** research results reveal that the initiation of micro-cracks near the GB is prior to the propagation of the main *** a hydrogen environment,hydrogen can cause serious embrittlement of the crack tip and promote crack *** energy release rate in the main crack growth direction in the dislocation emission direction is the ***,the main crack will eventually merge with the micro-cracks at the GB along the direction of the slip band,resulting in fracture of the crystal *** research presented in this paper provides some new information for the first stage of crack propagation and contributes to the analysis of the mechanism of crystal metal fracture.

关键词： Crack propagation Dislocation emission Dislocation pile-up Grain boundary Energy release rate

Chlorine capped SnO_2 quantum-dots modi?ed TiO_2 electron selective layer to enhance the performance of planar perovskite solar cells

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Science Bulletin 2019年第8期64卷 547-552页

作者： Tingting wu Chao Zhen jinbo wu Chunxu Jia Mustafa Haider Lianzhou Wang Gang Liu Hui-Ming Cheng Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences School of Materials Science and Engineering University of Science and Technology of China University of Chinese Academy of Sciences Nanomaterials Centre School of Chemical Engineering and AIBN The University of Queensland Low-Dimensional Material and Device Laboratory Tsinghua-Berkeley Shenzhen Institute Tsinghua University

SnO_2 quantum dots(QDs) ended with chlorine ions are introduced at the interface of spin-coated TiO_2 electron selective layer(ESL)/perovskite to fill the pinholes in the layer and passivate the trapping defects. As a result of the increased interface electron collection and reduced bulk recombination, the planar perovskite solar cell with the QDs modified ESL gives the large power conversion efficiency enhancement from 14.9% to 17.3% and greatly improved stability under the continuous light irradiation.

关键词： TiO2 SnO2 quantum dots Interface modification Perovskite solar cells

Facile fabrication of drug-loaded PEGDA microcapsules for drug evaluation using droplet-based microchip

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Chinese Chemical Letters 2022年第5期33卷 2697-2700页

作者： Xindi Sun Qirui wu Wei Li Xiuqing Gong Jun-Yi Ge jinbo wu Xinghua Gao Materials Genome Institute Shanghai UniversityShanghai 200444China

Droplet-based microfluidic technology can be utilized as a microreactor to prepare novel functional monodisperse *** this study,a droplet-based microfluidic chip with surface modification,which allowed the one-step preparation of double emulsion *** O/W/O double emulsion using polyethylene(glycol)diacrylate(PEGDA)solution as the intermediate water phase was prepared by regulating the hydrophilicity and hydrophobicity of the chip surface,with PEGDA microcapsules prepared using UV *** then anti-tumor drug paclitaxel and neurotoxin 6-OHDA were encapsulated in microcapsules for drug and toxicology evaluation,*** to controls,drug-loaded mi-crocapsules caused a significant increase in the death rate of PC12 *** indicates that the obtained drug-loaded microcapsules could be used in drug evaluation and potentially in drug screening and deliv-ery.

关键词： PEGDA microcapsule Droplet-based microfluidic PC12 cells Drug evaluation

Perspectives on water science: transport and application of confined water

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Science China(Physics,Mechanics & Astronomy) 2014年第5期57卷 829-835页

作者： ZENG XiPing wu jinbo LI ShunBo CHAU YeungYeung HE GuangHong WEN WeiJia YANG GuoZhen Hong Kong University of Science and Technology ChongQing University Institute of Physics Chinese Academy of Sciences

The confinements of water can be divided into two main categories,namely,the confinements on surface or interface and the confinements in bulk *** adding ions or applying electric field,the intensity and distribution of the hydrogen bonds can be greatly *** are collectively known as confinement on water surface or interface,which has potential applications in life science and industries involving evaporation *** bulk water could be found everywhere in nature,such as in granular and porous materials,macromolecules and gels,*** investigation of the physical properties and the transports of the confined bulk water will contribute to understanding certain types of life activities such as the water transport in plant and in new application of extracting the shale oil and water.

关键词： water science confined water surface confined water bulk transport

Split-Ring Structured All-Inorganic Perovskite Photodetector Arrays for Masterly Internet of Things

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Nano-Micro Letters 2023年第1期15卷 25-42页

作者： Bori Shi Pingyang Wang Jingyun Feng Chang Xue Gaojie Yang Qingwei Liao Mengying Zhang Xingcai Zhang Weijia Wen jinbo wu Materials Genome Institute Shanghai UniversityShanghai 200444People’s Republic of China Zhejiang Laboratory Hangzhou 311100People’s Republic of China HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute FutianShenzhenPeople’s Republic of China School of Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA School of Engineering and Applied Sciences Harvard UniversityCambridgeMA 02138USA Department of Physics Shanghai UniversityShanghai 200444People’s Republic of China The Advanced Material Thrust The Hong Kong University of Science and Technology(Guangzhou)GuangzhouPeople’s Republic of China

Photodetectors with long detection distances and fast response are important media in constructing a non-contact human-machine interface for the Masterly Internet of Things(MIT).All-inorganic perovskites have excellent optoelectronic performance with high moisture and oxygen resistance,making them one of the promising candidates for high-performance photodetectors,but a simple,low-cost and reliable fabrication technology is urgently ***,a dual-function laser etching method is developed to complete both the lyophilic split-ring structure and electrode *** novel split-ring structure can capture the perovskite precursor droplet efficiently and achieve the uniform and compact deposition of CsPbBr3 ***,our devices based on laterally conducting split-ring structured photodetectors possess outstanding performance,including the maximum responsivity of 1.44×105 mA W^(−1),a response time of 150μs in 1.5 kHz and one-unit area<4×10-2 *** on these split-ring photodetector arrays,we realized three-dimensional gesture detection with up to 100 mm distance detection and up to 600 mm s^(−1) speed detection,for low-cost,integrative,and non-contact human-machine ***,we applied this MIT to wearable and flexible digital gesture recognition watch panel,safe and comfortable central controller integrated on the car screen,and remote control of the robot,demonstrating the broad potential applications.

关键词： Split-ring Dewetting Perovskite photodetector array Human-machine interface Gesture recognition

Design and experiment of bio-inspired GER fluid damper

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Science China(Information Sciences) 2020年第7期63卷 113-115页

作者： Huayan PU Yining HUANG Yi SUN Min WANG Shujin YUAN Zhen KONG Peipei YANG Liufeng CHU jinbo wu Yan PENG Shaorong XIE Jun LUO School of Mechatronics Engineering and Automation Shanghai University School of Materials Science and Engineering Shanghai University State Key Laboratory of Mechanical Transmission Chongqing University

Dear editor,With the rapid development of industrial robots,the influence of vibration has been considerably increasing. The consequent demand for vibration suppression in robot systems has become increasingly urgent. The effective vibration suppression can remarkably improve the performance of robots such as operation stability, detective and tracking accuracy, and the security of interaction with the human body.

关键词： GER fluid damper biological muscle robotic systems vibration attenuation

Two-dimensional-lag complex logistic map with complex parameters and its encryption application

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Chinese Physics B 2024年第5期33卷 324-335页

作者：张芳芳武金波寇磊马凤英吴黎明张雪 School of Information and Automation Engineering Qilu University of Technology (Shandong Academy of Sciences)Jinan 250353China Institute of Oceanographic Instrumentation Qilu University of Technology (Shandong Academy of Sciences)Qingdao 266000China

With the rapid development of internet technology,security protection of information has become more and more prominent,especially information *** the great advantages of chaotic encryption,we propose a 2D-lag complex logistic map with complex parameters(2D-LCLMCP)and corresponding encryption ***,we present the model of the 2D-LCLMCP and analyze its chaotic properties and system stability through fixed points,Lyapunov exponent,bifurcation diagram,phase diagram,***,a block cipher algorithm based on the 2D-LCLMCP is proposed,the plaintext data is preprocessed using a pseudorandom sequence generated by the *** on the generalized Feistel cipher structure,a round function F is constructed using dynamic S-box and DNA encoding rules as the core of the block cipher *** generalized Feistel cipher structure consists of two F functions,four XOR operations,and one permutation operation per *** symmetric dynamic round keys that change with the plaintext are generated by the ***,experimental simulation and performance analysis tests are *** results show that the block cipher algorithm has low complexit,good diffusion and a large key *** the block length is 64 bits,only six rounds of encryption are required to provide sufficient security and robustness against cryptographic attacks.

关键词： logistic map block ciphers chaotic system encryption

材料、能源、机械工程中高效的电流变技术——从机理到应用

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Engineering 2023年第5期24卷 151-171,I0004页

作者： Yudai Liang Dongyang Huang Xuefeng Zhou Ziqiu Wang Quan Shi Yaying Hong Huayan Pu Mengying Zhang jinbo wu Weijia Wen Materials Genome Institute Shanghai UniversityShanghai 200444China Zhejiang Laboratory Hangzhou 311100China Fok Ying Tung Research Institute The Hong Kong University of Science and Technology(Guangzhou)Guangzhou 511458China School of Mechatronic Engineering and Automation Shanghai UniversityShanghai 200444China Department of Physics Shanghai UniversityShanghai 200444China Department of Physics The Hong Kong University of Science and TechnologyHong Kong 999077China The Advanced Material Thrust The Hong Kong University of Science and Technology(Guangzhou)Guangzhou 511458China

电流变(ER)技术是一种基于电流变效应的先进技术。电流变技术中最常见的材料是电流变液(ERF)。电流变液是一种软物质智能材料,其黏度可以通过施加电场来可逆地调节。电流变液的衍生物、一种新型的电响应软物质材料——电流变弹性体(ERE)... 详细信息

电流变(ER)技术是一种基于电流变效应的先进技术。电流变技术中最常见的材料是电流变液(ERF)。电流变液是一种软物质智能材料,其黏度可以通过施加电场来可逆地调节。电流变液的衍生物、一种新型的电响应软物质材料——电流变弹性体(ERE),由于其不沉降、易封装的优点也得到了越来越多的关注。电流变材料由于其可逆可调、快速响应、低能耗等特性在机械工程中有着广泛的应用。除了基础的电流变材料的合成和应用以外,电流变技术还应用在了能源材料制备、石油运输、储能等诸多领域。电流变技术在能源领域的应用为其在其他领域的潜在应用提供了一个很好的范例。本文结合最新的研究成果,从机理到应用,系统地综述了电流变技术在材料、能源和机械工程等领域的研究现状和未来发展前景。

关键词：电流变技术电流变弹性体电流变材料机械工程石油运输电流变液电流变效应智能材料

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认知无线电系统中的两判决门限能量检测算法

高技术通讯 2009年第9期19卷 887-890页

作者：吴进波罗涛乐光新北京邮电大学信息与通信工程学院无线通信系统与网络教育部重点实验室北京100876

基于传统单门限能量检测算法,提出了一种适用于认知无线电系统的两门限能量检测算法。在算法分析中定义了两个性能指标,即认知用户和主用户间的碰撞概率以及限制认知用户对频谱使用的限占概率。理论分析与仿真结果表明,与传统单门限能... 详细信息

基于传统单门限能量检测算法,提出了一种适用于认知无线电系统的两门限能量检测算法。在算法分析中定义了两个性能指标,即认知用户和主用户间的碰撞概率以及限制认知用户对频谱使用的限占概率。理论分析与仿真结果表明,与传统单门限能量检测算法相比较,两门限能量检测算法降低了认知用户和主用户间的碰撞概率,同时也引起限占概率的增加,即该算法能够在牺牲部分频谱效率的条件下,明显降低认知用户对主用户的干扰,保证了主用户使用频谱的优先权。

关键词：认知无线电能量检测检测门限频谱选择