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Recent advances in fluorinated polymers:synthesis and diverse applications

science China Chemistry 2023年第12期66卷 3347-3359页

作者： Yutong Chen Chuan Luo Faqi Hu Zhenkai Huang Kan Yue South China Advanced Institute for Soft Matter Science and Technology School of Emergent Soft MatterSouth China University of TechnologyGuangzhou 510640China School of Materials Science and Hydrogen Energy Foshan UniversityFoshan 528000China Jiangsu Key Laboratory of Advanced Functional Polymers Design and Application Soochow UniversitySuzhou 215000China

Fluorinated polymers exhibit a unique combination of attributes,including chemical inertness,low surface energy,exceptional weather resistance,and intriguing electrical *** mini review provides an overview of recent advancements in the research of fluorinated polymers,highlighting the development of synthetic strategies for novel fluorinated polymers and their diverse applications in various *** fluorinated polyolefins can be modified through chemical methods to produce functional *** of fluorinated olefins with non-fluorinated monomers effectively addresses synthesis challenges,yielding main-chain fluoro-containing polymers with specific functional ***,recent studies have revealed that free radical(co)polymerization of fluorinated(meth)acrylate monomers leads to new fluorinated polymers with enhanced solubility,processability,and structural *** on these new synthetic strategies,a range of fluorinated polymer materials has been developed for a multitude of applications,including flexible electrodes,alternating current(AC)electroluminescent devices,energy storage capacitors,triboelectric nanogenerators,and lithium *** their customized structures and excellent properties,fluorinated polymers hold significant promise to uncover more potential applications in the era of flexible and wearable electronics.

关键词： fluorinated polymers fluorinated monomers flexible electronic device lithium batteries triboelectric nanogenerator

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Effect of copper on edge cracking behavior and microstructure of rolled austenitic stainless steel plate

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Journal of Iron and Steel Research International 2022年第2期29卷 281-294页

作者： Guang-hui Zhao Jian Zhang Juan Li Hua-ying Li Hai-tao Liu Li-feng Ma School of Mechanical Engineering Taiyuan University of Science and TechnologyTaiyuan030024ShanxiChina Shanxi Provincial Key Laboratory of Metallurgical Device Design Theory and Technology Taiyuan030024ShanxiChina State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang110819LiaoningChina

Cu is known to affect the edge cracking characteristics of austenitic stainless steel as it causes *** hot rolling test of four kinds of austenitic stainless steel with different copper content(0,2.42,3.60 and 4.35 wt.%)was carried out to examine the effect of hot rolling cracks on steel containing different copper *** evolution of crack and microstructure was analyzed using the scanning electron microscope,energy-dispersive spectrometer,electron back scattered diffraction and transmission electron *** results showed an upward trend in edge cracking degree when Cu content was 4.35%,and the crack extended from the edge of the steel plate to the middle by about 14 ***,severe oxidation was observed inside the crack by *** the increase in copper content at 1250℃,the content of{110}<112>brass and{112}<111>copper textures *** the content of copper was 4.35%,the decrease was most significant,and{112}<111>copper texture content decreased to only 0.5%.Generally,the textures of 2.42%Cu and 3.60%Cu 304L steel changed little,while a large change in the texture of 4.35%Cu 304L steel was *** conclude,the increase in rolling temperature can prevent edge crack and its propagation effectively.

关键词： Austenitic stainless steel Copper Edge crack Microstructure Ferrite

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High-contrast and real-time visualization of membrane proteins in live cells with malachite green-based fluorogenic probes

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Chinese Chemical Letters 2022年第3期33卷 1637-1642页

作者： Yefeng Chen Chenghong Xue Jie Wang Minqiu Xu Yuyao Li Yiru Ding Heng Song Weipan Xu Hexin Xie State Key Laboratory of Bioreactor Engineering Shanghai Key Laboratory of New Drug DesignFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of PharmacyEast China University of Science and TechnologyShanghai 200237China

Imaging dynamics of membrane proteins of live cells in a wash-free and real-time manner has been a challenging task. Herein, we report unprecedented applications of malachite green(MG), an organic dye widely used in pigment industry, as a switchable fluorophore to monitor membrane enzymes or noncatalytic proteins in live cells. Conformationally flexible MG is non-fluorescent in aqueous solution, yet covalent binding with endogenous proteins of cells significantly enhances its fluorescence at 670 nm by restricting flexibility of dye. Integrating a phosphate-caged quinone methide precursor with MG yielded a covalent labeling fluorogenic probe, allowing real-time imaging of membrane alkaline phosphatase(ALP,a model catalytic protein) activity in live cells with over 100-fold enhancement of fluorescence ***, MG is also applicable to image non-catalytic protein by conjugation with protein-specific ligand. A fluorogenic probe consisted of c-RGDf K peptide and MG proved to be compatible with wash-free and real-time visualization of non-catalytic integrin α_(v)β_(3) in live cells with high contrast.

关键词： Cellular imaging Fluorogenic probe Environment-sensitive fluorophore Alkaline phosphatase Integrin

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TCB Intrusion Detection Method Based on Data Enhancement 10th

TCB Intrusion Detection Method Based on Data Enhancement

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10th International Conference of Pioneering Computer Scientists, Engineers and Educators, ICPCSEE 2024

作者： Ye, Yunlong Zhou, Lin Hu, Xiaobo Wang, Yong Department of Computer Science and Technology Shanghai University of Electric Power Shanghai China State Grid Key Laboratory of Power Industrial Chip Design and Analysis Technology Beijing Smart-Chip Microelectronics Technology Co. Ltd. Beijing China

ISBN: (纸本)9789819787456

Within the online sphere, intrusion detection technology plays an increasingly vital role in safeguarding our information security. The current research on intrusion detection mainly focuses on two aspects: machine learning and deep learning, but it cannot be ignored that data balance also affects the efficiency of intrusion detection. The vast majority of current datasets are imbalanced, and during the training process, the model ignores a few class samples, which affects the efficiency of intrusion detection. Therefore, in response to this issue, this article introduces a novel intrusion detection model that integrates Transformer and CNN-BiLSTM, leveraging WGAN-enhanced data. This model first uses Transformer for global capture, establishes global connections, then uses CNN-BiLTM to capture spatial and temporal features, and finally uses Softmax classifier for classification. The dataset used in this article is NSL-KDD. The experimental results show that after data balance processing, the accuracy of two classification tasks of TCB model reaches 92.19%, which is at least 2.24% higher than other models, and the accuracy of multi classification tasks reaches 82.94%, which is at least 1.03% higher than other models. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Network intrusion

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Beam Tracing with Physical Optics for Angular Glint Calculation in Near Field

Beam Tracing with Physical Optics for Angular Glint Calculat...

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2024 Photonics and Electromagnetics Research Symposium, PIERS 2024

作者： Wu, Yifan Li, Yuxuan Shen, Yuhao Yang, Lizhen Wu, Nan Lin, Hai Zhejiang University State Key Laboratory of CAD&CG Hangzhou310058 China Science and Technology on Electromagnetic Compatibility Laboratory China Ship Development and Design Center Wuhan China

ISBN: (纸本)9798350375909

Angular glint is an important factor affecting radar measurement accuracy, which comes from the interaction of multiple scattering centers of the extended target and cannot be eliminated. In the near-field region, angular glint exerts a more significant impact on radar tracking accuracy, and may even cause radar pointing to fall beyond the actual target extent. There are two methods for calculating angular glint, the Poynting vector method (PVM) and the phase gradient method (PGM), of which PVM is commonly used for theoretical calculations and PGM is often used for practical measurements. In this paper, the angular glint is calculated by PVM using the scattered field of the target. Therefore, optimizing the computational efficiency of the near-field scattered field is of utmost significance. While Geometrical Optics (GO) and Physical Optics (PO) are commonly used methods for high-frequency electromagnetic scattering calculations, GO can only calculate the scattered field in the specular direction, and PO is not applicable to scenarios involving multiple reflections. Therefore, this paper proposes a physical optics method based on beam tracing, which can not only calculate the scattered field in any direction but also solve the problem of multiple reflections. Furthermore, the PO method requires the initial subdivision of the target into small facets. The size of these facets is dependent on the frequency, and the number of facets for the target substantially increases as the frequency rises, thereby affecting computational efficiency. In the proposed method in this paper, the target can be composed of large-size facets, allowing for the rapid computation of the near-field scattering field, and higher computational efficiency can be obtained by introducing space acceleration structure and parallel computing techniques. © 2024 IEEE.

关键词： Radar measurement

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A Finite Element Human Body Model of Chinese Midsize Male for Pedestrian Safety Analysis

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Journal of Bionic Engineering 2024年第6期21卷 2924-2941页

作者： Fuhao Mo Ziyang Liang Tengfei Tian Guibing Li Zhi Xiao Sen Xiao State Key Laboratory of Advanced Design and Manufacture for Vehicle Hunan UniversityChangsha410082China Department of Orthopedics The Second Xiangya Hospital of Central South UniversityChangsha410011China Department of Tuina and Spinal Orthopaedics in Chinese Medicine Shenzhen Traditional Chinese Medicine HospitalThe Fourth Clinical Medical College of Guangzhou University of Chinese MedicineShenzhen518033China Tianjin Key Laboratory of Power Transmission and Safety Technology for New Energy Vehicles Hebei University of TechnologyTianjin300401China School of Mechanical Engineering Hunan University of Science and TechnologyXiangtan411201China

The anthropometric differences between European/American and Chinese population are remarkable and have significant influences on pedestrian kinematics and injury response in vehicle ***,the current study aims to develop and validate a Finite Element(FE)human body model representing the anthropometry of Chinese 50th percentile adult male for pedestrian safety analysis and development of Chinese ATDs(Anthropomorphic Test Devices).Firstly,a human body pedestrian model,named as C-HBM(Chinese Human Body Model),was developed based on the medical image data of a volunteer selected according to both anthropometry and anatomy characteristics of 50th percentile Chinese adult ***,the biofidelity of the C-HBM pedestrian model was validated against cadaver impact test data reported in the literature at the segment and full-body ***,the validated C-HBM pedestrian model was employed to predict Chinese pedestrian injuries in real world vehicle *** results indicate that the C-HBM pedestrian model has a good capability in predicting human body mechanical response in cadaver tests and Chinese leg and thorax injuries in vehicle *** analysis shows that the C-HBM pedestrian model has less sliding on the hood surface,shorter movement in the horizontal direction,and higher pelvis displacement in the vertical direction than cadavers and the pedestrian model in the anthropometry of westerner due to anthropometric differences in the lower *** currently developed C-HBM pedestrian model provides a basic tool for vehicle safety design and evaluation in China market,and for development of Chinese ATDs.

关键词： Biomechanics Chinese human body model Pedestrian safety Finite element modeling

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Tapered Periodic Sheet design for Edge Scattering Suppression

Tapered Periodic Sheet Design for Edge Scattering Suppressio...

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2023 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications, IMWS-AMP 2023

作者： Yao, Gengjiang Chen, Lijie He, Fan Cao, Zhaowang Huang, Ze Li, Haoran China Ship Development and Design Center Wuhan China Science and Technology on Electromagnetic Compatibility Laboratory Wuhan China School of Optics and Electronic Information Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9798350308761

In this paper, a Tapered Periodic Sheet (TPS) loaded on the metal edge is proposed to reduce the oblique incidence monostatic Radar Cross Section (RCS) of the metal plate. The TPS uses a uniform resistance sheet with fixed square resistance, a pattern period taper design is introduced to achieve a smooth transition of surface impedance, the surface current is smoothly tapered to zero from the metal edge to the air, and the edge diffraction field of metal edge is suppressed. The designed TPS is loaded horizontally along the edge of metal plate with a length of 96mm, which thickness closes to zero. The simulation results show that a dual-polarization more than 10dB monostatic RCS reduction effect of 1-12GHz (fractional bandwidth 169.2%) in a wide angle range of inclined incidence is achieved. The proposed TPS has excellent edge scattering suppression effect and can be widely used in RCS reduction design of actual radar stealth platform. © 2023 IEEE.

关键词： edge scattering suppression Radar Cross Section Reduction (RCSR) resistive sheet surface current control tapered periodic sheet

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Preliminary Analysis of Low-Enriched Uranium (LEU) Fuel Performance in the MIT reactor Fission Converter Experimental Facility

Preliminary Analysis of Low-Enriched Uranium (LEU) Fuel Perf...

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2024 Transactions of the American Nuclear Society on Winter Conference and Expo, ANS 2024

作者： Sears, Caroline Yu, Jiankai Hu, Lin-Wen Forget, Benoit Anderson, Kyle Mascolino, Valerio Wilson, Erik H. Massachusetts Institute of Technology Nuclear Reactor Laboratory 138 Albany St Cambridge02139 United States Argonne National Laboratory Nuclear Science and Engineering Division 9700 Cass Avenue LemontIL60439 United States

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Influences of CeO_(2)morphology on enhanced performance of electro-Fenton for wastewater treatment

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Journal of Rare Earths 2022年第12期40卷 1870-1877,I0002页

作者： Jingjing Hu Bei Wu Lei Chen Chengcheng Song Huifang Yang Fei Long Jie Sun Ru'an Chi Hubei Novel Reactor&Green Chemical Technology Key Laboratory Key Laboratory for Green Chemical Process of Ministry of EducationXingfa School of Mining EngineeringWuhan Institute of TechnologyWuhan 430073China Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission&Ministry of Education Hubei ProvinceCollege of Resource and Environmental ScienceSouth-Central University for NationalitiesWuhan 430074China

As a kind of rare-earth oxide,CeO_(2)has been considered as a great potential material for its abundant oxygen vacancies and catalysis activity in wastewater *** this study,three ceria samples with different morphological structure were prepared,and their effect on contaminates degradation in electro-Fenton(E-Fenton)system was *** is found that the morphology of CeO_(2)has great influence on promoting the performance of E-Fenton *** rod-like CeO_(2)(R-CeO_(2))induced EFenton system shows higher azo dye X3 B removal and mineralization rates than cubs(C-CeO_(2))and octahedrons(O-CeO_(2)),and the degradation kinetic rate constants are 0.28,0.169 and 0.181 min^(-1)respectively,already surpass that of the blank one(0.120 min^(-1)).The H_(2)O_(2)generation capacity of R-CeO_(2)induced E-Fenton system is also superior to the others,and the corresponding Faraday current efficiency even increases to 166.2%at 2.5 *** by scanning-transmission electron microscopy(STEM),X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),electron spin resonance(ESR),Raman spectroscopy were conducted to disclose the mystery behind this *** results indicate that the difference of surface oxygen vacancy density in different shaped CeO_(2)acts as a magic driving force for the accelerated oxygen reduction,and then leads to the enhanced degradation efficiency of E-Fenton *** work provides a new insight into the development and application of rare-earth elements based catalyst in E-Fenton technology.

关键词： CeO_(2) Electro-Fenton Current efficiency Exposed facets H_(2)O_(2) Morphology

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Heterogeneous Cu_(x)O Nano‑Skeletons from Waste Electronics for Enhanced Glucose Detection

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Nano-Micro Letters 2024年第11期16卷 554-568页

作者： Yexin Pan Ruohan Yu Yalong Jiang Haosong Zhong Qiaoyaxiao Yuan Connie Kong Wai Lee Rongliang Yang Siyu Chen Yi Chen Wing Yan Poon Mitch Guijun Li Center on Smart Manufacturing Division of Integrative Systems and DesignThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SAR 999077People’s Republic of China The Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya 572000People’s Republic of China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200People’s Republic of China

Electronic waste(e-waste)and diabetes are global challenges to modern ***,solving these two challenges together has been challenging until ***,we propose a laser-induced transfer method to fabricate portable glucose sensors by recycling copper from *** bring up a laser-induced full-automatic fabrication method for synthesizing continuous heterogeneous Cu_(x)O(h-Cu_(x)O)nano-skeletons electrode for glucose sensing,offering rapid(<1 min),clean,air-compatible,and continuous fabrication,applicable to a wide range of Cu-containing *** this approach,h-Cu_(x)O nanoskeletons,with an inner core predominantly composed of Cu_(2)O with lower oxygen content,juxtaposed with an outer layer rich in amorphous Cu_(x)O(a-Cu_(x)O)with higher oxygen content,are derived from discarded printed circuit *** employed in glucose detection,the h-Cu_(x)O nano-skeletons undergo a structural evolution process,transitioning into rigid Cu_(2)O@CuO nano-skeletons prompted by electrochemical *** transformation yields exceptional glucose-sensing performance(sensitivity:9.893 mA mM^(-1) cm^(-2);detection limit:0.34μM),outperforming most previously reported glucose *** functional theory analysis elucidates that the heterogeneous structure facilitates gluconolactone *** glucose detection device has also been downsized to optimize its scalability and portability for convenient integration into people’s everyday lives.

关键词： Copper oxide Electron 3D tomography E-waste Glucose detection Electrochemical activation

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