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Rational design of ZnCdS/TpPa-1-COF heterostructure photocatalyst by strengthening the interface connection in solar hydrogen production reactions

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Nano Research 2024年第3期17卷 1027-1034页

作者： Di Yang Zhi-Gang Li xinghao zhang Zenghuan Ren Weihan Lu Haining Liu Xiaomeng Guo Jijie zhang Xian-He Bu Tianjin Key Laboratory of Metal and Molecule-Based Material Chemistry School of Materials Science and EngineeringNankai UniversityTianjin 300350China College of Chemistry and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang 050018China State Key Laboratory of Elemento-Organic Chemistry College of ChemistryNankai UniversityTianjin 300071China

ZnCdS quantum dots(QDs)are highly coveted in photocatalysis research for their exceptional visible-light responses and high light-absorption ***,their practical application is hindered by their tendency to aggregate,due to having high surface *** address this issue,herein,a heterostructure is synthesized by growing ZnCdS QDs with a size of approximately 5 nm onto the surface of a two-dimensional(2D)covalent organic framework(COF),*** approach suppresses the aggregation of the QDs and improves their *** ZnCdS/TpPa-1-COF composite exhibited a peak hydrogen evolution rate of 6244.16μmol·g^(-1)·h^(-1),which was 2.89 and 4.18 times greater than that of ZnCdS and TpPa-1-COF,*** zero-dimensional/two-dimensional(0D/2D)heterojunction formed by ZnCdS and TpPa-1-COF generates a strong interfacial force,which is attributed to the intimate contact between the *** connections accelerate charge separation,improve the utilisation of reduced electrons,and reduce the extent of agglomeration of the ZnCdS QDs,thereby resulting in high hydrogen production activity of the ***,the photocatalytic mechanism is studied using Kelvin probe force microscopy and theoretical *** study offers a novel approach for creating sulfide photocatalysts and is crucial for investigating the potential practical applications of the related photocatalysts.

关键词： covalent organic frameworks quantum dots photocatalysis hydrogen generation heterojunction

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Direct detection of the transient superresolution effect of nonlinear saturation absorption thin films

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Photonics Research 2015年第4期3卷 100-105页

作者： xinghao zhang Jingsong Wei Shanghai Institute of Optics and Fine Mechanics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China

Using a strong nonlinear saturation absorption effect is one technique for breaking through the diffraction limit. In this technique, formation of a dynamic and reversible optical pinhole channel and transient superresolution is critical. In this work, a pump–probe transient detection and observation–experimental setup is constructed to explore the formation process directly. A Ge2Sb2Te5 thin film with strong nonlinear saturation absorption is investigated. The dynamic evolution of the optical pinhole channel is detected and imaged, and the transient superresolution spot is directly captured experimentally. Results verify that the superresolution effect originates from the generation of an optical pinhole channel and that the formation of the optical pinhole channel is dynamic and reversible. A good method is provided for direct detection and observation of the transient process of the superresolution effect of nonlinear thin films.

关键词： Sb Te Direct detection of the transient superresolution effect of nonlinear saturation absorption thin films ICCD NSA

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A hierarchical algorithm for cyberspace situational awareness based on analytic hierarchy process

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High Technology Letters 2007年第3期13卷 291-296页

作者：胡威 Li Jianhua Jiang xinghao zhang Yueguo Chen Xiuzhen Department of Electronic Engineering Shanghai Jiaotong University Shanghai 200240 P.R. China

The existing network security management systems are unable either to provide users with useful security situation and risk assessment, or to aid administrators to make right and timely decisions based on the current state of network. These disadvantages always put the whole network security management at high risk. This paper establishes a simulation environment, captures the alerts as the experimental data and adopts statistical analysis to seek the vulnerabilities of the services provided by the hosts in the network. According to the factors of the network, the paper introduces the two concepts： Situational Meta and Situational Weight to depict the total security situation. A novel hierarchical algorithm based on analytic hierarchy process （AHP） is proposed to analyze the hierarchy of network and confirm the weighting coefficients. The algorithm can be utilized for modeling security situation, and determining its mathematical expression. Coupled with the statistical results, this paper simulates the security situational trends. Finally, the analysis of the simulation results proves the algorithm efficient and applicable, and provides us with an academic foundation for the implementation in the security situation

关键词： analytic hierarchical process security management situational awareness security vulnerabilities security situation

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700℃实炉验证试验平台过热试件热流密度测量及壁温分布研究

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锅炉技术 2024年第3期55卷 1-9页

作者：钟犁肖平朱忠亮李小敏张兴豪刘卫国徐鸿华北电力大学能源动力与机械工程学院北京102209 北京华能长江环保科技研究院有限公司北京102209 中国华能集团清洁能源技术研究院有限公司北京102209 华能国际电力江苏能源开发有限公司南京电厂江苏南京210035

随着锅炉主蒸汽参数的提高,炉内受热面壁温的监测对于安全运行日益重要,并且有利于根据壁温分布进行选材,降低造价。南京电厂700℃验证试验平台炉内过热试件分布着12个牌号的材料,掌握锅炉管壁温分布及其随负荷变化的规律,是准确分析材... 详细信息

随着锅炉主蒸汽参数的提高,炉内受热面壁温的监测对于安全运行日益重要,并且有利于根据壁温分布进行选材,降低造价。南京电厂700℃验证试验平台炉内过热试件分布着12个牌号的材料,掌握锅炉管壁温分布及其随负荷变化的规律,是准确分析材料验证情况的基础。采用火焰强度热流计对炉内热流密度的空间分布进行实际测量,结合受热面进出口蒸汽参数的实际测量结果,对炉内壁温分布进行计算,结果表明:过热试件不同方向的热流密度在15~180kW/m^(2)范围内,并呈现明显的规律性,其中收到来自前方的热流密度最大、下方的热流密度其次,并且屏底热流密度最高、炉顶位置热流密度最低,屏底水平管平均热流密度约为垂直管的1.3倍。根据热流密度空间分布测量结果计算的过热试件壁温沿着蒸汽流程方向快速增加,在屏底位置出现一个小的峰值,然后增速放缓、最后在靠近管屏出口处略有下降;而管壁和蒸汽温差呈现先增加后减少、并在屏底出现明显峰值的现象,最外侧管屏底最大温差达到约88℃,屏顶温差则降低到约25℃。锅炉负荷越高,热流密度越大,同时壁温沿程增长速率越高。炉内壁温测量元件与壁温计算结果的最大温度偏差小于2%,两者具有良好的一致性。根据壁温计算结果对过热试件进行选材,约有51.2%的锅炉管须采用镍基合金材料,相比全部采用镍基合金材料可大幅降低成本。

关键词： 700℃验证试验平台过热试件高温材料炉内壁温分布热流密度

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Simultaneous Evaporation and Foaming for Batch Coaxial Extrusion of Liquid Metal/Polydimethylsiloxane Porous Fibrous TENG

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Advanced Fiber Materials 2023年第6期5卷 1949-1962页

作者： xinghao zhang Jiawen Xu Xiaomei zhang Guojie Chao Qixin Cao Tianxi Liu Yu Liu Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment School of Mechanical EngineeringJiangnan UniversityWuxi 214122People’s Republic of China Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material EngineeringJiangnan UniversityWuxi 214122People’s Republic of China

The utilization of textile-based triboelectric nanogenerators(t-TENGs)offers great potential for providing sustainable and wearable ***,the current designs of t-TENGs present limitations in terms of low electrical outputs and less developed,straightforward batch processing ***,a facile bottom-up foaming-combined coaxial extrusion method is developed for the massive fabrication of liquid metal/polydimethylsiloxane(PDMS)core–shell porous fibrous TENG,which can be directly woven to form *** designs are studied for high-fidelity fibrous TENG manufacturing and porosity-controlled micropore ***,porous fibrous TENGs are applied to integrate different woven structures,and the electrical and mechanical performances of the t-TENGs are *** with plain surface fibrous TENG,the porous fibrous TENG achieves a~fivefold improvement in the open-circuit voltage(VOC)and a~sevenfold improvement in the short-circuit current(ISC).These outcomes indicate that we can prepare a range of polymers for t-TENGs with enhanced output performance even though they do not demonstrate great *** work also demonstrates successful integration for sustainably powering miniature *** results can contribute to human motion energy harvesting for wearable self-powered sensors.

关键词： Triboelectric nanogenerators Coaxial fibers Porous surface Self-powered sensors

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BDT and Creep Behaviors of NiAl-25 *** Cr Alloy at Various Temperatures

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Journal of Materials Science & Technology 2005年第5期21卷 641-646页

作者： Guangye zhang, xinghao DU, Jianting GUO+ and Hengqiang YEInstitute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

Brittle-to-ductile transition （BDT） behavior and creep behavior of extruded NiAl-25Cr alloy at elevated temperatures were investigated. The results reveal that the alloy exhibits obvious BDT behavior with the increase in temperature and BDT temperature （BDTT） is sensitive to initial strain rate. When the initial strain rate increases by two orders of magnitude, BDTT has an increase of approximate 80 K. The creep data in the temperature range of 1073～1123 K reveal two distinct regions of creep behavior in this material. At lower temperature, the creep characteristics are consistent with structural controlled creep process where creep deformation is controlled by dislocation climb. At higher temperature, the creep characteristics are consistent with mobility-controlled deformation where viscous glide of dislocations controls creep. The apparent activation energy determined by creep in both regions exceeds the value for lattice self-diffusion in NiAl by a considerable amount. This can be explained in terms of the simultaneous deformation of second phase particles （γ′-Ni3Al and a-Cr phase） along NiAl matrix during creep.

关键词： NiAl Intermetallics Mechanical properties Brittle-to-ductile transition Creep

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Optimization of microstructure design for enhanced sensing performance in flexible piezoresistive sensors

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Journal of Advanced Ceramics 2024年第6期13卷 711-728页

作者： xinghao Fan Hailong Hu Bin Liao Yaqi zhang Fan zhang School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China Research Institute of Aerospace Technology Central South UniversityChangsha 410083China

Flexible piezoresistive strain sensors have received significant attention due to their diverse applications in monitoring human activities and health,as well as in robotics,prosthetics,and human–computer interaction *** the various flexible sensor types,those with microstructure designs are considered promising for strain sensing due to their simple structure,high sensitivity,extensive operational range,rapid response time,and robust *** review provides a concise overview of recent advancements in flexible piezoresistive sensors based on microstructure design for enhanced strain sensing performance,including the impact of microstructure on sensing mechanisms,classification of microstructure designs,fabrication methods,and practical ***,this review delves into the analysis of piezoresistive sensor sensing mechanisms and performance parameters,exploring the relationship between microstructure design and performance ***,an in-depth discussion is presented,focusing on the primary themes of microstructure design classification,process selection,performance characteristics,and specific *** review employs mathematical modeling and hierarchical analysis to emphasize the directionality of different microstructures on performance enhancement and to highlight the performance advantages and applicable features of various microstructure *** conclusion,this review examines the multifunctionality of flexible piezoresistive sensors based on microstructure design and addresses the challenges that still need to be overcome and improved,such as achieving a wide range of stretchability,high sensitivity,and robust *** review summarizes the research directions for enhancing sensing performance through microstructure design,aiming to assist in the advancement of flexible piezoresistive sensors.

关键词： microstructure design sensing performance flexible piezoresistive strain sensors microsensing mechanism

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Ash Detection of Coal Slime Flotation Tailings Based on Chromatographic Filter Paper Sampling and Multi-Scale Residual Network

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Intelligent Automation & Soft Computing 2023年第12期38卷 259-273页

作者： Wenbo Zhu Neng Liu Zhengjun Zhu Haibing Li Weijie Fu Zhongbo zhang xinghao zhang School of Mechatronic Engineering and Automation Foshan UniversityFoshan528000China China Coal Technology Engineering Group Tangshan Research Institute Tangshan063000China

The detection of ash content in coal slime flotation tailings using deep learning can be hindered by various factors such as foam,impurities,and changing lighting conditions that disrupt the collection of tailings *** address this challenge,we present a method for ash content detection in coal slime flotation *** method utilizes chromatographic filter paper sampling and a multi-scale residual network,which we refer to as ***,tailings are sampled using chromatographic filter paper to obtain static tailings images,effectively isolating interference factors at the flotation ***,the MRCN,consisting of a multi-scale residual network,is employed to extract image features and compute ash *** the MRCN structure,tailings images undergo convolution operations through two parallel branches that utilize convolution kernels of different sizes,enabling the extraction of image features at various scales and capturing a more comprehensive representation of the ash content ***,a channel attention mechanism is integrated to enhance the performance of the *** combination of the multi-scale residual structure and the channel attention mechanism within MRCN results in robust capabilities for image feature extraction and ash content *** experiments demonstrate that this proposed approach,based on chromatographic filter paper sampling and the multi-scale residual network,exhibits significantly superior performance in the detection of ash content in coal slime flotation tailings.

关键词： Coal slime flotation ash detection chromatography filter paper multi-scale residual network

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弯月面银墨水直写导电图案

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微纳电子技术 2024年第4期61卷 179-186页

作者：于江云张星浩徐嘉文周雯刘禹陈彦秋江南大学机械工程学院江苏无锡214122

为解决微米尺寸下低粘度材料难以弯月面直写的问题,以银墨水作为实验材料,对其弯月面直写过程中的打印参数进行了深入探究。使用外径230μm的针头,在100 nL/min的体积流量下,已能实现单根稳定打印宽度180~300μm的线条,打印速度最高可达... 详细信息

为解决微米尺寸下低粘度材料难以弯月面直写的问题,以银墨水作为实验材料,对其弯月面直写过程中的打印参数进行了深入探究。使用外径230μm的针头,在100 nL/min的体积流量下,已能实现单根稳定打印宽度180~300μm的线条,打印速度最高可达10 mm/s。同时,探究了银墨水打印过程中针尖相对基底的移动速度、针尖与基底间的间距、墨水的体积流量、打印层数对基底上沉积图案的线宽和形貌的影响。研究结果表明,在毛细液柱不会断掉的情况下,沉积线宽随着基底移动速度的增大而减小,随着体积流量的增大而增大。在一定基底移动速度和体积流量下,当针尖与基底间的间距增大,线宽会减小,直至液柱无法正常成形。在无外界干预下,线宽随着打印层数的增大而增大。研究还发现在咖啡环效应与马兰戈尼效应的共同作用下,线条图案会出现“坡-峰-谷”结构。除此之外,通过测量线条的电学性能,发现电阻率最小可至0.19Ω·cm,并打印了电学图案作为展示。

关键词：毛细管力银墨水直写低粘度咖啡环效应弯月面

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Unraveling the Fundamental Mechanism of Interface Conductive Network Influence on the Fast‑Charging Performance of SiO‑Based Anode for Lithium‑Ion Batteries

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Nano-Micro Letters 2024年第3期16卷 53-68页

作者： Ruirui zhang Zhexi Xiao Zhenkang Lin xinghao Yan Ziying He Hairong Jiang Zhou Yang Xilai Jia Fei Wei Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084People’s Republic of China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083People’s Republic of China Beijing Key Laboratory of Chemical Power Source and Green Catalysis School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing 100081People’s Republic of China Institute of Polymer Science and Engineering Department of Chemical EngineeringTsinghua UniversityBeijing 100084People’s Republic of China

Progress in the fast charging of high-capacity silicon monoxide(SiO)-based anode is currently hindered by insufficient conductivity and notable volume *** construction of an interface conductive network effectively addresses the aforementioned problems;however,the impact of its quality on lithium-ion transfer and structure durability is yet to be ***,the influence of an interface conductive network on ionic transport and mechanical stability under fast charging is explored for the first time.2D modeling simulation and Cryo-transmission electron microscopy precisely reveal the mitigation of interface polarization owing to a higher fraction of conductive inorganic species formation in bilayer solid electrolyte interphase is mainly responsible for a linear decrease in ionic diffusion energy ***,atomic force microscopy and Raman shift exhibit substantial stress dissipation generated by a complete conductive network,which is critical to the linear reduction of electrode residual *** study provides insights into the rational design of optimized interface SiO-based anodes with reinforced fast-charging performance.

关键词： Fast charging SiO anode Interface conductive network Ionic transport Mechanical stability

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