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Magnetron sputtering deposition of [FePt/Ag]_n multilayers for perpendicular recording

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Rare Metals 2006年第1期25卷 47-50页

作者： wang Fang XU xiaohong WU Haishun School of Chemistry and Materials Science Shanxi Normal University Linfen 041004 China

[FePt/Ag]n multilayers were deposited on glass substrates by RF magnetron sputtering and ex situ annealed at 550℃ for 30 min. The effects of inserted Ag layer thickness and the number of bilayer repetitions （n） on the structure and magnetic properties of the multilayers were investigated. It was found that the difference between in-plane and out-of-plane coercivities varied with an increase of inserted Ag layer thickness in the [FePt 2 nm/Ag x nm]10 multilayers. The ratio of out-of-plane coercivity to in-plane coercivity reached the maximum value with the Ag layer thickness of 5 nm, indicating that the Ag layer thickness plays an important role in obtaining perpendicular orientation. For the [FePt 2 nm/Ag 5 um]n multilayers, perpendicular orientation is also influenced by n. The maximum value of the ratio of out-of-plane coercivity to in-plane coercivity appeared when n was given as 8. It was found that the [FePt 2 nm/Ag 5 nm]8 had a high perpendicular coercivity of 520 kA/m and a low in-plane one of 88 kA/m, which shows a strong perpendicular anisotropy.

关键词： [FePt/Ag]n multilayer perpendicular orientation magnetron sputtering coercivity

Robustness evaluation method for unmanned aerial vehicle swarms based on complex network theory

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Chinese Journal of Aeronautics 2020年第1期33卷 352-364页

作者： xiaohong wang Yuan ZHANG Lizhi wang Dawei LU Guoqi ZENG School of Reliability and Systems Engineering Beihang UniversityBeijing 100083China Unmanned System Institute Beihang UniversityBeijing 100083China Key Laboratory of Advanced Technology of Intelligent Unmanned Flight System of Ministry of Industry and Information Technology Beijing 100083China

Unmanned Aerial Vehicle(UAV)swarms have been foreseen to play an important role in military applications in the future,wherein they will be frequently subjected to different disturbances and destructions such as attacks and equipment ***,a sophisticated robustness evaluation mechanism is of considerable importance for the reliable functioning of the UAV ***,their complex characteristics and irregular dynamic evolution make them extremely challenging and uncertain to evaluate the robustness of such a *** this paper,a complex network theory-based robustness evaluation method for a UAV swarming system is *** method takes into account the dynamic evolution of UAV swarms,including dynamic reconfiguration and information *** paper analyzes and models the aforementioned dynamic evolution and establishes a comprehensive robustness metric and two evaluation *** robustness evaluation method and algorithms considering dynamic reconfiguration and information correlation are ***,the validity of the proposed method is verified by conducting a case study *** results can further provide some guidance and reference for the robust design,mission planning and decision-making of UAV swarms.

关键词： Complex networks Dynamic reconfiguration Information correlation Robustness evaluation Unmanned Aerial Vehicles(UAV)

Ontogeny of the Traumatocrinus hsui

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Acta Geologica Sinica(English Edition) 2011年第3期85卷 544-548页

作者： wang Chuanshang CHEN xiaohong wang Xiaofeng CHENG Long Wuhan Institute of Geology and Mineral Resources CGS Wuhan 430223 China

It is suggested that the characters of Traumatocrinus hsui Mu infants change remarkably in different ages;however,the characters of adult individuals are comparatively *** present study examined specimens of infant and adult individuals of *** on these observations,the authors divided the ontogeny of *** into four infant stages（infant stageⅠ-Ⅳ）and one adult *** addition,the characters of the anal pyramid are supplemented and the infrabasal plates of *** are confirmed in the present paper for the first time.

关键词： Traumatocrinus hsui ontogeny infant individual

Unmanned aerial vehicle swarm mission reliability modeling and evaluation method oriented to systematic and networked mission

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Chinese Journal of Aeronautics 2021年第2期34卷 466-478页

作者： Lizhi wang Xuejiao ZHAO Yuan ZHANG xiaohong wang Tielin MA Xia GAO Unmanned System Institute Beihang UniversityBejing 100083China School of Reliability and Systems Engineering Beihang UniversityBeijing 100083China Digital Twinning and System Engineering Research Center Yunnan Innovation InstituteBeihang UniversityBejing 650233China Key Laboratory of Advanced Technology of Intelligent Unmanned Flight System of M inistry of Industry and Information Technology Beijing 100083China School of Astronautics Beihang UniversityBejing 100083China

With the development of Unmanned Aerial Vehicle(UAV) system autonomy, network communication technology and group intelligence theory, mission execution in the form of a UAV swarm will be an important realization of future applications. Traditional single-UAV mission reliability modeling methods have been unable to meet the requirements of UAV swarm mission reliability modeling. Therefore, the UAV swarm mission reliability modeling and evaluation method is proposed. First, aimed at the interdependence among the multiple layers, a multi-layer network model of a UAV swarm is established. At the same time, based on the system having the following characteristics—using a mission chain to complete the mission and applying the connectivity of the mission network—the mission network model of a UAV swarm is established. Second, vulnerability and connectivity are selected as two indicators to reflect the reliability of the mission, and aimed at random attack and deliberate attack, vulnerability and connectivity evaluation methods are proposed. Finally, the validity and accuracy of the constructed model are verified through simulations,and the model and selected indicators can meet the reliability requirements of the UAV swarm mission. In this way, this study provides quantitative reference for UAV-swarm-related decisionmaking work and supports the development of UAV-swarm-related work.

关键词： Complex networks Connectivity Mission reliability Unmanned Aerial Vehicles(UAV) Vulnerability

Rapid Detection of Cement Raw Meal Composition Based on Near Infrared Spectroscopy

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Journal of Wuhan University of Technology(Materials Science) 2022年第5期37卷 900-904页

作者： HUANG Bing wang xiaohong JIANG Ping QIAO Jia School of Chemistry and Chemical Engineering University of JinanJinan250022China School of Electrical Engineering University of JinanJinan250022China

The composition of cement raw materials was detected by near-infrared *** was found that the BiPLS-SiPLS method selected the NIR spectral band of cement raw materials,and the partial least squares regression algorithm was adopted to establish a quantitative correction model of cement raw materials with good prediction *** root-mean-square errors of SiO_(2),Al_(2)O_(3),Fe_(2)O_(3) and CaO calibration were 0.142,0.072,0.034 and 0.188 *** results show that the NIR spectroscopy method can detect the composition of cement raw meal rapidly and accurately,which provides a new perspective for the composition detection of cement raw meal.

关键词： near infrared spectroscopy cement raw meal band selection detection model

Emission-tunable Ba_(2)Y_(1-x)Sc_(x)NbO_(6):Bi^(3+)(0≤x≤1.0)phosphors for white LEDs

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Journal of Rare Earths 2022年第12期40卷 1819-1826,I0001页

作者： Zhihua Gao Fengyan Fu Lili Niu Min Jin xiaohong wang Department of Applied Chemistry Hengshui UniversityHengshui 053000China Sichuan University Chengdu 610041China

Here,we report a series of Bi^(3+)-doped Ba_(2)Y_(1-x)Sc_(x)NbO_(6)(0≤x≤1.0 mol)phosphors by using the traditional high temperature solid-state *** achieve the structural and photoluminescent(PL)information,several experimental characterizations and theoretical calculations were carried out,including X-ray diffraction(XRD),Rietveld refinement,UV-visible diffuse reflectance and PL spectra,temperature dependent PL spectra,and density functional theo retical(DFT)*** XRD results show that the Bi^(3+)-doped Ba_(2)Y_(1-x)Sc_(x)NbO_(6)samples belong to the double-perovskite phase with a cubic space group of Fm3 m,and the diffraction positions shift toward high diffraction angle when the larger Y^(3+)ions are gradually replaced by the smaller Sc^(3+)*** addition,the refined XRD findings show that the Bi^(3+)ions tend to substitute the Y^(3+)and Sc^(3+)sites in the Bi^(3+)-doped Ba_(2)Y_(1-x)Sc_(x)NbO_(6)0

关键词： Bi^(3+) Double-perovskite Tunable emission Energy transfer White LEDs Rare earths

PIC catalysis based on polyoxometalates promoting 5-HMF oxidation in H_(2)O/MIBK biphase

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Chinese Chemical Letters 2023年第5期34卷 521-524页

作者： Qiwen wang Wenwen Bu Zonghang Li Yu Qi xiaohong wang Key Lab of Polyoxometalate Science of Ministry of Education Faculty of ChemistryNortheast Normal UniversityChangchun 130024China

Novel polyoxometalate(POM)Pickering interfacial catalyst(PIC)was fabricated through loading(NH_(4))_(5)H_(6)PMo_(4)V_(8)O_(40)(PMo_(4)V_(8))on both alkyl and alkyl-amino groups functionalized silica ***_(4)V_(8)/SiO_(2)(C_(8)/C_(8)NH_(2)with molar ratio as 1:1)PIC system provided a new catalytic model for aerobic conversion of 5-hydroxymethylfurfural(5-HMF),as well as its recovery and product separation in H_(2)O/methyl isobutyl ketone(MIBK)biphase *** the ratio of PMo_(4)V_(8),C_(8)and C_(8)NH_(2)gave rise to variety in hydrophilicity and hydrophobicity for PMo_(4)V_(8)/SiO_(2)(C_(8)/C_(8)NH_(2)),which enhanced the transformation of 5-HMF to 2,5-diformylfuran(DFF)in H_(2)O/MIBK with 73.7%yield at 81.8%conversion than in H_(2)O or MIBK single phase.

关键词： Polyoxometalate Pickering interfacial catalyst 5-Hydroxymethylfurfural 2,5-Diformylfuran Atmospheric O_(2)

Improvement of the matrix and the interface quality of a Cu/Al composite by the MARB process

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Rare Metals 2007年第3期26卷 230-235页

作者： XU Rongchang TANG Di REN Xueping wang xiaohong WEN Yonghong National Engineering Research Center for Advanced Rolling Technology University of Science and Technology Beijing Beijing 100083 China

The matrix accumulative roll bonding technology （MARB） can improve the matrix performance of metal composite and strengthen the bonding quality of the interface./n this research, for the fwst time, the technology of MARB was proposed. A sound Cu/AI bonding composite was obtained using the MARB process and the bonding characteristic of the interface was studied using scanning electricity microscope （SEM） and energy-dispersive spectroscopy （EDS）. The result indicated that accumulation cycles and diffusion annealing temperature were the most important factors for fabricating a Cu/AI composite material. The substrate aluminum was strengthened by MARB, and a high quality Cu/AI composite with sound interface was obtained as well.

关键词： matrix accumulative roll bonding Cu/Al composite material interface bonding diffusion annealing

Adaptive event-trigger-based sampled-data stabilization of complex-valued neural networks: a real and complex LMI approach

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Science China(Information Sciences) 2023年第4期66卷 297-298页

作者： xiaohong wang Zhen wang Jianwei XIA Hao SHEN Yuxia LI College of Electrical Engineering and Automation Shandong University of Science and Technology College of Mathematics and Systems Science Shandong University of Science and Technology School of Mathematical Science Liaocheng University School of Electrical Engineering and Information Anhui University of Technology

Dear editor, With the popularization of digital techniques, practical control systems are usually implemented via embedded microprocessors, and sampled-data control is applied. The system state is sampled and received by the controller only at discrete sampling instants [1]. Sampled-data control is fundamentally time-triggered,

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