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Aggregate 2024年第2期5卷 222-228页

作者： Zhongyu Li Kexin Fu Huangjun Deng Kaixuan Nie Zhe Pan Zhu Mao Juan Zhao Gang Li Pengli Zhu Zhenguo Chi Rong Sun National Key Laboratory of Materials for Integrated Circuits Shenzhen Institute of Advanced Electronic MaterialsShenzhen Institute of Advanced TechnologyChinese Academy of SciencesShenzhenChina PCFM Lab GDHPPC LabGuangdong Engineering Technology Research Center for High-performance Organic and Polymer Photoelectric Functional FilmsState Key Laboratory of OEMTSchool of ChemistrySun Yat-sen UniversityGuangzhouChina State Key Laboratory of Optoelectronic Material and Technologies School of Materials Science and EngineeringSun Yat-sen UniversityGuangzhouChina

Polymeric ultralong organic phosphorescence(UOP)with persistent emission is of great importance in practical ***,achieving good water-resistance for long-term environmental stability is a formidable *** this contribution,through tailoring the alkyl-chain length of the hardeners and emitters,polymeric UOPs with varying crosslinking density and hydrophobic effect were ***,all the polymers show no obvious decrease in UOP emission after high temperature-humidity test(85℃/85%relative humidity for 7 days).Detailed investigations demonstrate that the rigid covalent crosslinking networks suppress the quenching of triplet excitons while the hydrophobic microenvironment affords good water/moisture-resistance ***,the polymers with superior processability are successfully applied as optical coatings,prepreg,and afterglow *** this work,we provide a new strategy to promote the long-term stability of polymeric UOP materials in high-temperature-humidity conditions.

关键词： aqueous environment hydrophobic effect long-term stability polymeric phosphorescence room temperature phosphorescence

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MODELING AND ANALYSIS OF ELECTRO-HYDROSTATIC ACTUATORS EFFICIENCY 34th

MODELING AND ANALYSIS OF ELECTRO-HYDROSTATIC ACTUATORS EFFIC...

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34th Congress of the International Council of the Aeronautical sciences, ICAS 2024

作者： Jiang, Chaofan Shang, Yaoxing Yu, Tian Liu, Zhicheng Li, Mingyang School of Automation Science and Electrical Engineering Beihang University Beijing China National Key Laboratory of Aircraft Integrated Flight Control Beihang University Beijing China Ningbo Institute of Technology Beihang University Ningbo China Tianmushan Laboratory Yuhang District Xixi Octagon City Hangzhou China

Electro-hydrostatic Actuator (EHA) is an important part which is used to control the control surface of aircraft. EHA has the advantage of higher efficiency compared with traditional hydraulic system. Compared with the hydraulic actuator, EHA adds motor, hydraulic pump, booster tank and other components. Therefore, the calculation of EHA efficiency is also more complex than that of hydraulic actuators. After research and analysis, the efficiency of wet motor-pump is low under large load or high speed. Using a passive load-sensitive EHA configuration can improve this situation. The motor copper loss can be reduced by reducing the displacement of piston pump under large load. But the displacement cannot be reduced blindly, which will lead to dynamic decline. The influence of displacement change velocity on dynamic and energy loss was studied. The effects of load sensitive variable displacement mechanism parameters such as piston area, spring stiffness, radius of damping hole and initial pressure on the velocity of displacement change were studied. The influence of parameters on dynamics and energy loss is obtained. So in order to balance efficiency and dynamics, particle swarm optimization method is adopted. Piston area, spring stiffness, radius of damping hole and initial pressure of variable displacement are taken as optimization variables. Energy loss and step response risetime are taken as optimization objectives. The energy loss and risetime are kept at a low level by obtaining appropriate load sensing mechanism parameters. The results show that the passive load sensing mechanism parameters obtained by particle swarm optimization algorithm can reduce the energy consumption of EHA under large load conditions and improve the efficiency of EHA without reducing the dynamic of EHA. © 2024, International Council of the Aeronautical sciences. All rights reserved.

关键词： Aircraft hydraulic systems

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circRNAs deregulation in exosomes derived from BEAS-2B cells is associated with vascular stiffness induced by PM_(2.5)

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Journal of Environmental sciences 2024年第3期137卷 527-539页

作者： Qingping Liu Yaling Zhang Bin Han Mengruo Wang Huaifang Hu Jie Ning Wentao Hu Meiyu Chen Yaxian Pang Yuanyuan Chen Lei Bao Yujie Niu Rong Zhang Department of Toxicology Hebei Medical UniversityShijiazhuang 050017China State Key Laboratory of Environment Health(Incubation) Key Laboratory of Environment and HealthMinistry of EducationKey Laboratory of Environment and Health(Wuhan)Ministry of Environmental ProtectionSchool of Public HealthTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China China CDC Key Laboratory of Environment and Population Health National Institute of Environmental HealthChinese Center for Disease Control and PreventionBeijing 100021China Occupational Health and Environmental Health Hebei Medical UniversityShijiazhuang 050017China Hebei Key Laboratory of Environment and Human Health Hebei Medical UniversityShijiazhuang 050017China

As an environmental pollutant,ambient fine particulate matter (PM_(2.5)) was linked to cardiovascular *** molecular mechanisms underlying PM_(2.5)-induced extrapulmonary disease has not been elucidated *** this study the ambient PM_(2.5)exposure mice model we established was to explore adverse effects of vessel and potential ***-term PM_(2.5)exposure caused reduced lung function and vascular stiffness in *** chronic PM_(2.5)induced migration and epithelial-mesenchymal transition (EMT) phenotype in BEAS-2B *** PM_(2.5)treatment,the circRNAs and mRNAs levels of exosomes released by BEAS-2B cells were detected by competing endogenous RNA (ceRNA) array,which contained 1664 differentially expressed circRNAs (DE-circRNAs) and 308 differentially expressed m RNAs (DE-mRNAs).By bioinformatics analysis on host genes of DE-circRNAs,vascular diseases and some pathways related to vascular diseases including focal adhesion,tight junction and adherens junction were ***,ceRNA network was constructed,and DE-mRNAs in ceRNA network were conducted functional enrichment analysis by Ingenuity Pathway Analysis,which indicated that hsa_circ_0012627,hsa_circ_0053261and hsa_circ_0052810 were related to vascular endothelial ***,it was verified experimentally that Exo^(PM2.5)could induce endothelial dysfunction by increased endothelial permeability and decreased relaxation in *** present study,we investigated in-depth knowledge into the molecule events related to PM_(2.5) toxicity and pathogenesis of vascular diseases.

关键词： Fine particulate matter Vascular stiffness Exosome ceRNA microarray Endothelial dysfunction

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Comprehensive investigation of two environmentally-friendly imidazolium nitrate ionic liquids: from calorimetry to thermal risk evaluation

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Journal of Thermal Analysis and Calorimetry 2023年第11期148卷 4913-4925页

作者： Liu, Shang-Hao Yu, Chang-Fei Wu, Ke-Fan Chen, Chan-Cheng School of Chemical Engineering Anhui University of Science and Technology Anhui Huainan232001 China State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines Anhui University of Science and Technology Anhui Huainan232001 China Department of Safety Health and Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung824 Taiwan

Due to their low volatility, ionic liquids (ILs) are widely used in many industries. However, some ILs are reported to be explosive under unstable conditions in the literature, and therefore a comprehensive assessment of the fire safety risks should be conducted before industrial applications. This study aims to investigate the thermal stability of two environmentally friendly used ILs (1-butyl-3-methylimidazolium nitrate ([C4mim]NO3) and 1-butyl-2,3-dimethylimidazolium nitrate ([C4mmim]NO3) using simultaneous thermogravimetric analyzer, differential scanning calorimetry, accelerating rate calorimeter, and thermogravimetry coupled to Fourier transform infrared spectroscopy. Based on the results of dynamic and isothermal thermogravimetric experiments, [C4mmim]NO3 shows higher thermal stability compared with [C4mim]NO3, indicating that the methyl substitution at the imidazolium C2 has a positive effect on the thermal stability of imidazolium nitrate. Additionally, the increased methyl substitution leads to more significant thermal decomposition of [C4mmim]NO3 and enhanced gas production under adiabatic conditions, which means that the potential thermal hazards are increased. Furthermore, [C4mim]NO3 and [C4mmim]NO3 may have different thermal decomposition pathways because the possible thermal decomposition products are not identical. The produced flammable gases also indicate that the operating temperatures of [C4mim]NO3 and [C4mmim]NO3 must be strictly controlled to prevent the occurrence of accidents. © 2022, Akadémiai Kiadó, Budapest, Hungary.

关键词： Nitrates

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Reference surface self-calibration stitching algorithm based on Legendre polynomials for testing synchrotron radiation flat mirrors 8

Reference surface self-calibration stitching algorithm based...

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8th Asia Pacific Conference on Optics Manufacture, APCOM 2023 and 3rd International Forum of Young Scientists on Advanced Optical Manufacturing, YSAOM 2023

作者： Liu, Yong Gao, Xibo Hu, Zubo Xue, Shuai Chen, Shanyong Huang, Cheng Du, Chunyang Hu, Hao Dai, Yifan Peng, Xiaoqiang Wang, Linfeng College of Intelligence Science and Technology National University of Defense Technology Changsha Hunan410073 China Hunan Key Laboratory of Ultra-Precision Machining Technology Changsha Hunan410073 China Laboratory of Science and Technology on Integrated Logistics Support National University of Defense Technology Changsha Hunan410073 China State Key of High Performance Complex Manufacturing Central South University Changsha Hunan410073 China

ISBN: (纸本)9781510672673

X-ray mirrors play a critical role in transmitting and focusing beams in advanced light source devices like synchrotron radiation (SR) and free electron laser (FEL) light sources. The Root-Mean-Square (RMS) value of surface shape accuracy required for these mirrors is typically sub-micro radian/sub-nanometer, and their aperture can be hundreds of millimeters or even meters. To achieve this accuracy, deterministic figuring is required and surface figure error is the premise. Interferometric stitching test is commonly utilized. However, interferometric test obtains the surface figure error relative to the reference surface. To obtain the absolute surface figure error of X-ray mirrors, it is crucial to obtain the surface figure error of the reference surface before or during stitching measurement and separate it from the stitching result. To achieve this, a reference surface self-calibration interferometric stitching algorithm based on Legendre polynomial fitting is reported. The algorithm fits the reference surface by orthogonal Legendre polynomials in the rectangular domain, and the polynomial coefficients are expressed as interlocking terms in the stitching algorithm. The fitting coefficients are optimized and fitted together with the free compensation terms, i. *** translation and tilt terms. The paper established the theoretical model of the algorithm and conducted simulations on an X-ray mirror with a length of 300 mm. A two dimensional stitching interferometry device was built. An X-ray mirror with a length of 300 mm was tested utilizing the proposed method. The short-Term repeatability was preliminarily analyzed. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Synchrotron radiation

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Multi-component quantitative and feed-forward neural network for pattern classification of raw and wine-processed Corni Fructus

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Traditional Medicine Research 2023年第1期8卷 12-19页

作者： Yu Liu Ying-Fang Cui Dan-Dan Shi Shu-Li Man Xia Li Wen-Yuan Gao State Key Laboratory of Food Nutrition and Safety/Key Laboratory of Industrial Microbiology Ministry of Education/Tianjin Key Laboratory of Industry Microbiology/National and Local United Engineering Lab of Metabolic Control Fermentation Technology/China International Science and Technology Cooperation Base of Food NutritionSafety and Medicinal Chemistry/College of BiotechnologyTianjin University of Science&TechnologyTianjin 300457China Tianjin Key Laboratory for Modern Drug Delivery&High-Efficiency School of Pharmaceutical Science and TechnologyTianjin UniversityTianjin 300072China.

Background:To promote the quality evaluation,clarify the processing mechanism and distinguish origins of Corni Fructus(cornus)from different ***:This study developed a high performance liquid chromatography method for simultaneous determination of 5-hydroxymethylfurfural,2 phenolic acids and 4 iridoid glycosides and the reference fingerprint of cornus from different *** addition,the feedforward neural network model provided a pattern classification of sample ***:The content of morroniside and loganin were the highest in all raw cornus samples ranging from 9.45μg/mg to 16.3μg/mg and 6.64μg/mg to 13.7μg/mg,*** level of sweroside in raw cornus from Henan(0.83μg/mg^(-1).39μg/mg)and Zhejiang(0.64μg/mg^(-1).17μg/mg)were greater than other *** wine-processing,the glucose or fructose were dehydrated to increase the levels of *** C-4 position of-COOCH3 of hot-sensitive iridoid glycosides was hydrolyzed to generate-COOH as stable *** derivatives may be degraded to increase the content of phenolic ***,an excellent feedforward neural network model for identification of raw cornus and wine-prepared cornus was established which could distinguish the sample ***:This work provided a trustworthy method to evaluate the quality and distinguish the sources of ***,the clear processing mechanism provided a scientific foundation for controlling the cornus quality during wine-processing.

关键词： Cornus officinalis Sieb.et Zucc. quality evaluation fingerprints processing mechanism feedforward neural network

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Unified throughout-pore microstructure enables ultrahigh separator porosity for robust high-flux lithium batteries

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Electron 2023年第1期1卷 37-49页

作者： Dongjiang Chen Yuanpeng Liu Chao Feng Yuhui He Shengyu Zhou Botao Yuan Yunfa Dong Haodong Xie Guangfeng Zeng Jiecai Han Weidong He National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbinChina Center for Composite Materials and Structures Harbin Institute of TechnologyHarbinChina State Key Laboratory of Electronic Thin Film and Integrated Devices University of Electronic Science and Technology of ChinaChengduChina Chongqing Research Institute Harbin Institute of TechnologyChongqingChina Interdisciplinary Graduate Program in Materials Science Vanderbilt UniversityNashvilleTennesseeUSA

With small thickness,commercial polyolefin separators own low porosity to ensure sufficient thermomechanical properties,resulting in tortuous and enlarged Li+diffusion pathways that induce large overpotentials and detrimental dendrite *** a dilemma,the exploration of highly porous separators has been challenged by their large thickness,impairing the applicability of such ***,an ultraporous architecture is designed to shorten Li+transfer pathways by impregnating electrolyteaffinitive poly(vinylidene fluoride-co-hexafluoropropylene)into ultralight~3μm 3D-polytetrafluoroethylene scaffold(abbreviated as UP3D).The UP3D separator with a porosity of 74%gives rise to 70%enhancement in Li+transference and 77%reduction in Li+transfer resistance(2.67 mΩmm^(−1))and thus enables an ultrahigh Li+flux of 22.7 mA cm^(−2),effectively alleviating Li+concentration gradient across the *** the separator,the LiFePO4 half cell delivers a capacity of 118 mAh g^(−1) with an unparalleled capacity retention of 90%after 1000 cycles at 2 C,and a graphite||LiNi_(0.6)Co_(0.2)Mn_(0.2)O_(2)pouch full cell delivers an areal energy density of 6.8 mWh cm^(−2)at 8.848 mA(1.4 mA cm^(−2))with a high cathode loading of 134.9 *** results,together with the scalable production of the separator,reflect its promising potential in high-flux battery applications of separators that require both ultrahigh porosity and reliability.

关键词： Li deposition Li-ion batteries polytetrafluoroethylene separator ultrahigh porosity

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A simulation research method for data injection attacks on DC microgrids

A simulation research method for data injection attacks on D...

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2024 China Automation Congress, CAC 2024

作者： Hou, Yunhui Liu, Mengxiang Shen, Na National Key Laboratory of Transient Physics Nanjing University of Science and Technology Nanjing China Department of Automatic Control and Systems Engineering University of Sheffield Western Bank Sheffield United Kingdom

ISBN: (纸本)9798350368604

By using Typhoon HIL simulator, a simulation research method of data injection attack against secondary control DC microgrid is established, which reveals the important influence of the attack function on the effectiveness and covertness of the attack. Firstly, a decentralized four-node DC microgrid system using TCP/IP Modbus protocol for communication is built in Typhoon HIL simulator, then, a microgrid security testing experimental platform based on the man-in-the-middle attack as a network attack method is built in Kali Linux system, which can carry out timed single- and multilinks data injection attacks and replay attack on the above four-node DC microgrid. The paper designs a variety of data injection attack schemes to study the impact of data injection attacks on voltage and current control in this DC microgrid, including single-link attack, multi-link composite attack, and replay attack using different attack functions. By controlling the main parameters of the attack function, the amplitude of the fluctuation of the output voltage generated by the attack can be controlled, which can produce a more covert and effective attack effect. © 2024 IEEE.

关键词： DC microgrids False data injection attack Man-in-the-middle attack Power grid cyber security Replay attack

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Attention-Based Residual Dense Shrinkage Network for ECG Denoising

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Computer Modeling in Engineering & sciences 2024年第3期138卷 2809-2824页

作者： Dengyong Zhang Minzhi Yuan Feng Li Lebing Zhang Yanqiang Sun Yiming Ling Hunan Provincial Key Laboratory of Intelligent Processing of Big Data on Transportation Changsha University of Science and TechnologyChangsha410114China School of Computer and Communication Engineering Changsha University of Science and TechnologyChangsha410114China School of Computer and Artificial Intelligence Huaihua UniversityHuaihua418000China School of Computer National University of Defense TechnologyChangsha410073China New Energy Centralized Control Center CHN Energy Hunan Power New Energy Co.Ltd.Changsha410000China

Electrocardiogram(ECG)signal is one of the noninvasive physiological measurement techniques commonly usedin cardiac ***,in real scenarios,the ECGsignal is susceptible to various noise erosion,which affectsthe subsequent pathological ***,the effective removal of the noise from ECG signals has becomea top priority in cardiac diagnostic *** at the problem of incomplete signal shape retention andlow signal-to-noise ratio(SNR)after denoising,a novel ECG denoising network,named attention-based residualdense shrinkage network(ARDSN),is proposed in this ***,the shallow ECG characteristics are extractedby a shallow feature extraction network(SFEN).Then,the residual dense shrinkage attention block(RDSAB)isused for adaptive noise ***,feature fusion representation(FFR)is performed on the hierarchicalfeatures extracted by a series of RDSABs to reconstruct the de-noised ECG *** on the MIT-BIHarrhythmia database and MIT-BIH noise stress test database indicate that the proposed scheme can effectively resistthe interference of different sources of noise on the ECG signal.

关键词： Electrocardiogram signal denoising signal-to-noise ratio attention-based residual dense shrinkage network MIT-BIH

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Source-Configured Microwave Plasmonic Vortices Based on Single Meta-Particle

Source-Configured Microwave Plasmonic Vortices Based on Sing...

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2023 International Applied Computational Electromagnetics Society Symposium, ACES-China 2023

作者： Kong, Xianglin Zhao, Lei Shen, Xiaopeng Xu, Yinfang School of Information and Control Engineering China School of Materials Science and Physics China University Mining and Technology Xuzhou China National Key Laboratory of Science and Technology on Test Physics & Numerical Mathematics Beijing China

ISBN: (纸本)9781733509657

In this paper, generation of plasmonic vortices with tunable topologic charges is proposed in the microwave regime. Tunable vortices with topologic charges of 0, +1 and -1 can be configured by illuminating incident plane waves with linearly polarization (LP), left-circularly polarization (LHCP) and right-circularly polarization (RHCP) on a single meta-particle, respectively. A spiral meta-particle operating at 2.94 GHz is designed, fabricated and measured to demonstrate the source-configured characteristics. The results showed that simulation and test are consistent with the theoretical ones. © 2023 Applied Computational Electromagnetics Society (ACES).

关键词： Vortex flow

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