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Science China Chemistry 2025年

作者： xiaofang shi Nan shi Miaomiao Dang Chengyu Ji Yingjie Li Peiyi Wu Zhiguo Hu Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials School of Chemistry and Chemical Engineering Henan Normal University State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Chemistry Chemical Engineering and Biotechnology & Center for Advanced Low-dimension Materials Donghua University

The conventional method of fabricating hydrogels constantly confronts the conflict between elasticity and toughness, limiting their repetitive application. Achieving the desired elasticity through a simple and low-cost approach is a significant challenge for hydrogels, particularly through rational molecular design. Here, low-hysteresis and high-toughness hydrogels are developed from the design of a new feature monomer, N-acryloylethylsemicarbazide (NACE). Based on a concept of “asymmetric Hbonding design”, the unique double and triple H-bonding of NACE can result in a novel asymmetric crosslinking polymer with alternating strong and weak H-bonding regions. The NACE is copolymerized with acrylamide (AM) to regulate the mechanical properties of hydrogel via H-bonding density. The P(NACE-AM) ionic hydrogels are obtained simply and rapidly via one-step photopolymerization without a chemical cross-linking agent. The P(NACE-AM) hydrogels combine superb mechanical elasticity and toughness, and excellent ionic conductivity, showing great potential as durable ionic conductive devices for wearable utilization.

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Effect of mold rotation on inclusion distribution in bearing steel during electroslag remelting process

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China Foundry 2014年第5期11卷 452-456页

作者： Chang Lizhong shi xiaofang Wang Runxi Cong Junqiang Li Tao School of Metallurgy Engineering Anhui University of Technology

To remove the inclusions in the ingots by conventional electroslag remelting （ESR）, the bearing steel was prepared using ESR process but with mold rotation in this study. Experimental results show a reduction in amount of large inclusions when the mold rotation rate is 6 r＆#183;min-1, and the inclusions are uniformly distributed in the ESR ingot. As comparison with the electroslag ingots of conventional ESR （stationary mold）, the portion of the Al2O3 inclusions smal er than 1 μm in size increase from 38% to 41.4%, whereas that of the SiO2 inclusions increases from 48% to 74% in the ingots when mold rotation is applied. This phenomenon is caused by the decrease in metal droplet size, resulting in large contact area between the slag pool and metal droplets in ESR process with mold rotation. Moreover, the metal droplets have relatively long movement routes, leading to long metal contact time between the slag pool and metal droplets when a relative motion between the consumable electrodes and mold is present. However, when the mold rotation rate is increased to 45 r＆#183;min-1, inclusion removing effect decreases. An excessive rotation rate causes wild motion in the slag pool, which drives the molten metal droplets to move violently, and as a result, the slag is entrapped into the metal pool, decreasing the ability of slag absorbing inclusions.

关键词： electroslag remelting mold rotation inclusion metal droplet

Effects of Single and Repeated Exposure to a 50-Hz 2-mT Electromagnetic Field on Primary Cultured Hippocampal Neurons

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Neuroscience Bulletin 2017年第3期33卷 299-306页

作者： Ying Zeng Yunyun Shen Ling Hong Yanfeng Chen xiaofang shi Qunli Zeng Peilin Yu Bioelectromagnetics Laboratory Department ofOccupational and Environmental HealthSchool of Public HealthZhejiang UniversityHangzhou 310058China Department of Neurobiology Zhejiang University School of MedicineHangzhou 310058China Department of Toxicology School of Public HealthZhejiang UniversityHangzhou 310058China Institute of Cognitive Neuroscience and Department of Psychology Zhejiang Sci-Tech UniversityHangzhou 310018China

The prevalence of domestic and industrial electrical appliances has raised concerns about the health risk of extremely low-frequency magnetic fields（ELF-MFs）. At present, the effects of ELF-MFs on the central nervous system are still highly controversial, and few studies have investigated its effects on cultured neurons. Here, we evaluated the biological effects of different patterns of ELF-MF exposure on primary cultured hippocampal neurons in terms of viability, apoptosis, genomic instability,and oxidative stress. The results showed that repeated exposure to 50-Hz 2-mT ELF-MF for 8 h per day after different times in culture decreased the viability and increased the production of intracellular reactive oxidative species in hippocampal neurons. The mechanism was potentially related to the up-regulation of Nox2 ***, none of the repeated exposure patterns had significant effects on DNA damage, apoptosis, or autophagy, which suggested that ELF-MF exposure has no severe biological consequences in cultured hippocampal neurons.

关键词： ELF-MF Primary cultured hippocampal neurons Oxidative stress Cell viability

An intelligent light-managing ionic skin for UV-protection,IR stealth,and optical camouflaged Morse codes

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Science China Materials 2022年第8期65卷 2281-2288页

作者： xiaofang shi Zhouyue Lei Peiyi Wu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of ChemistryChemical Engineering and BiotechnologyCenter for Advanced Low-Dimension MaterialsDonghua UniversityShanghai 201620China John A.Paulson School of Engineering and Applied Sciences Harvard UniversityCambridgeMA02138USA State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200433China

Ionic skins that demonstrate great advantages in the mechanical properties and multiple sensory capabilities are regarded as an attractive candidate to mimic functions of human ***,human skin is vulnerable to be damaged under long-time sunlight irradiation,and most of the current ionic skins also lack a protection against harmful ultraviolet and infrared ***,this work develops a multifunctional ionic skin based on ionic conductive and light-managing hydrogels via a facile one-step locally confined *** is mechanically adaptable,able to modulate light in the broadband solar spectrum,and protect human skin from the harmful ultraviolet and infrared ***,without complicated processing,the ionic skin enables human-machine interactions via wireless and optical camouflaged Morse *** believe this work will promote the development of smart wearable devices with multiple customizable functions.

关键词： ionic skins hydrogels light-managing human-machine interfaces

Hybrid C8-BTBT/In GaAs nanowire heterojunction for artificial photosynaptic transistors

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Journal of Semiconductors 2022年第11期43卷 9-21页

作者： Yiling Nie Pengshan Xie Xu Chen Chenxing Jin Wanrong Liu xiaofang shi Yunchao Xu Yongyi Peng Johnny C.Ho Jia Sun Junliang Yang Hunan Key Laboratory for Super Microstructure and Ultrafast Process School of Physics and ElectronicsCentral South UniversityChangsha 410083China Department of Materials Science and Engineering City University of Hong KongKowloon 999077Hong Kong SARChina State Key Laboratory of Terahertz and Millimeter Waves City University of Hong KongKowloon 999077Hong Kong SARChina Key Laboratory of Advanced Materials Processing&Mold(Zhengzhou University) Ministry of EducationZhengzhou 450002China

The emergence of light-tunable synaptic transistors provides opportunities to break through the von Neumann bottleneck and enable neuromorphic ***,a multifunctional synaptic transistor is constructed by using 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene(C8-BTBT)and indium gallium arsenide(InGaAs)nanowires(NWs)hybrid heterojunction thin film as the active *** illumination,the Type-I C8-BTBT/InGaAs NWs heterojunction would make the dissociated photogenerated excitons more difficult to *** persistent photoconductivity caused by charge trapping can then be used to mimic photosynaptic behaviors,including excitatory postsynaptic current,long/short-term memory and Pavlovian ***,a high classification accuracy of 89.72%can be achieved through the single-layer-perceptron hardware-based neural network built from C8-BTBT/InGaAs NWs synaptic ***,this work could provide new insights into the fabrication of high-performance optoelectronic synaptic devices.

关键词： photonic synaptic transistor C8-BTBT InGaAs heterojunction

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债务约束、税收激励与企业研发支出

财会通讯（下） 2019年第4期 98-102页

作者：史晓芳太原学院

本文基于2011-2016年沪深两市主板上市企业的经验数据,对债务约束视角下税收激励对企业研发支出的影响机理进行了研究,研究发现:税收激励与企业研发支出强度之间显著正相关;债务约束则与企业研发支出强度之间显著负相关;债务约束显著增... 详细信息

本文基于2011-2016年沪深两市主板上市企业的经验数据,对债务约束视角下税收激励对企业研发支出的影响机理进行了研究,研究发现:税收激励与企业研发支出强度之间显著正相关;债务约束则与企业研发支出强度之间显著负相关;债务约束显著增强了税收激励与企业研发支出之间的相关性。

关键词：税收激励研发支出研发支出强度债务约束

基于MasterCAM的曲面五轴数控加工方法误差的补偿技术

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机床与液压 2008年第F5期36卷 352-354页

作者：施晓芳张为平江苏技术师范学院机械与汽车工程学院江苏常州213001

介绍了基于MasterCAM的自由曲面五轴加工的加工方法误差分析,并分析了它的影响因素。对自由曲面五轴加工的加工方法误差建立了数学模型,并研究了基于MasterCAM对加工方法误差进行补偿的方法与技巧。

关键词： MasterCAM 曲面误差补偿

碱金属对汞均相氧化影响的化学动力学耦合流体动力学数值模拟

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动力工程学报 2014年第10期34卷 814-820页

作者：史晓方刁永发余婉璇东华大学环境科学与工程学院上海201620

针对生物质中氯、碱金属含量高的特点,在生物质与煤混燃的情况下,建立Hg/C/H/O/N/S/Cl/K/Na模型,结合化学动力学计算及敏感性分析,并运用Chemkin 4.1和Fluent 6.3软件实现化学动力学与流体动力学耦合,来模拟不同Cl2体积分数下汞的均相氧... 详细信息

针对生物质中氯、碱金属含量高的特点,在生物质与煤混燃的情况下,建立Hg/C/H/O/N/S/Cl/K/Na模型,结合化学动力学计算及敏感性分析,并运用Chemkin 4.1和Fluent 6.3软件实现化学动力学与流体动力学耦合,来模拟不同Cl2体积分数下汞的均相氧化,并探讨了生物质中的碱金属对汞均相氧化的影响.结果表明:Hg的氧化活性受到温度的限制,Hg的氧化主要发生在800K左右的温度区域,此时Hg的氯化活性是最强的,但此时K的氯化活性最弱,促进了HgCl2的生成;在有碱金属存在的情况下,碱金属与Cl2的反应对Hg氧化有抑制作用,但碱金属与SO2的反应对Hg氧化有促进作用.

关键词：汞碱金属均相氧化化学动力学耦合计算数值模拟

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英国中小学学生行为管理述评

现代基础教育研究 2017年第1期25卷 83-87页

作者：石晓芳上海市松江区九亭第三小学

学生行为管理对学生的学习与成长、课堂纪律管理、校园氛围的形成等方面都有着重要意义。在学生行为管理方面,我国还需要进一步深度发展,需要拓宽国际视野。文章对英国学生行为管理从政策、模式以及最近的理念三个方面进行了综述,对有... 详细信息

学生行为管理对学生的学习与成长、课堂纪律管理、校园氛围的形成等方面都有着重要意义。在学生行为管理方面,我国还需要进一步深度发展,需要拓宽国际视野。文章对英国学生行为管理从政策、模式以及最近的理念三个方面进行了综述,对有章可循性、科学性、发展性三个方面进行了剖析,并就其带来的启示进行了阐述,旨在为我国中小学学生管理提供一定的借鉴。

关键词：英国中小学学生行为管理

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城市轨道交通地下车站通风空调改造概算分析

隧道与轨道交通 2024年第1期 75-78,83页

作者：史晓方上海市隧道工程轨道交通设计研究院

随着城市轨道交通的快速发展,设备系统更新改造已成为热点。结合上海轨道交通车站通风空调更新改造项目,介绍了轨道交通改造工程分类、管理流程及通风空调更新改造项目概算,介绍了在实施方案概算过程中遇到的几个主要问题,对其产生原因... 详细信息

随着城市轨道交通的快速发展,设备系统更新改造已成为热点。结合上海轨道交通车站通风空调更新改造项目,介绍了轨道交通改造工程分类、管理流程及通风空调更新改造项目概算,介绍了在实施方案概算过程中遇到的几个主要问题,对其产生原因进行分析,同时给出建议和解决办法。这可对类似轨道交通改造项目提供借鉴和参考.

关键词：轨道交通地下车站通风空调设备改造概算