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用于薄液膜厚度测量的面阵列电导传感器的设计与验证

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传感技术学报 2024年第10期37卷 1667-1673页

作者：魏欢胡珀上海交通大学核科学与工程学院上海200240

液膜厚度是研究降液膜展开及发展演化所需的重要参数,目前市面上主流的膜厚探头主要是基于点探测原理、无法满足液膜展开的面厚度测量需求,本研究基于降液膜厚度的范围,自主设计了基于柔性印刷电路板的电导法同轴圆环面阵列传感器。成... 详细信息

液膜厚度是研究降液膜展开及发展演化所需的重要参数,目前市面上主流的膜厚探头主要是基于点探测原理、无法满足液膜展开的面厚度测量需求,本研究基于降液膜厚度的范围,自主设计了基于柔性印刷电路板的电导法同轴圆环面阵列传感器。成功制造的传感器在42 mm×57 mm面积上有3×4个同轴圆环探测单元,探头间距为15 mm,实现了0.3 mm~3 mm范围内的液膜厚度测量,测量电阻换算厚度的误差在10%以内,能满足薄液膜的面厚度测量需求。

关键词：物理量传感器液膜厚度测量电导法探点阵列柔性印刷电路板

Design and Implementation of Indoor positioning System using Bluetooth Low Energy

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Design and Implementation of Indoor Positioning System using...

Synthesis of Organic-Inorganic Hybrid Aluminum Hypophosphite Microspheres Flame Retardant and Its Flame Retardant Research on Thermoplastic polyurethane

作者： Xianfeng Hu Kun-Ming Yu Ken H.Chuang huan-po hsu Chung-Hsing Liu Shang-Wei Tung Yen-Chiu Chen Ming-Yuan Lei Nancy Tsai Program in Engineering Science Chung Hua University Dept.of Computer Science & Information Engineering Chung Hua University Dept.of Information Management Chung Hua University

Most of the positioning systems nowadays require *** indoor environments,however,GPS signals cannot be received properly due to the obstructions of the walls in the ***,other techniques such as RFID,Zigbee,WIFI or Bluetooth,are used based on the power loss,cost,or transmission range *** study,conducted at the AI+ Experience Center of Chung Hua University,adopts Bluetooth 5.0-based equipment and uses the received signal strength indication（RSSI） and triangulation method to perform indoor *** results show that Bluetooth positioning is more accurate in the sense that when the distance is within 1～3 meters,the error with the actual position is about 1 meter,which is more accurate than the RFID or WIFI positioning with the error of 2～3 meters.

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Journal of Wuhan University of Technology(Materials Science) 2024年第1期39卷 221-233页

作者：刘生鹏 XU Zhi ZHANG Xinyuan WEI huan XIONG Yun DING Yigang huanG Wenbo 许莉莉 Engineering Research Center of Phosphorus Resources Development and Utilization of Ministry of Education Key Laboratory for Green Chemical Process of Ministry of EducationSchool of Chemical Engineering and PharmacyWuhan Institute of TechnologyWuhan 430205China Hubei Three Gorges Laboratory Yichang 443007China School of Technology Materials Science and Engineering Wuhan Institute of TechnologyWuhan 430205China

Aluminum hypophosphite microspheres(AHP) were synthesized by hydrothermal method using NaH2po2·H2O and AlCl3·6H2O as raw materials, and then the AHP microspheres were polymerized by surface polymerization of micro-nanospheres with cyclic cross-linked poly(cyclotriphosphazene-co-4,4'-sulfonyldiphenol)(PZS). A new organic-inorganic poly(phosphonitrile)-modified aluminum hypophosphite microspheres(PZS-AHP) were synthesized by encapsulation and applied to flame retardant thermoplastic polyurethane(TPU). The microstructure and chemical composition of the PZS-AHP microsphere were characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy and X-ray spectroscopy. The thermal stability of PZS-AHP microsphere was explored with thermogravimetric analysis. Thermogravimetric data indicate that the PZS-AHP microspheres have excellent thermal stability. The thermal and flame-retarding properties of the TPU composites were evaluated by thermogravimetric(TG), limited oxygen index tests(LOI), and cone calorimeter test(CCT). The TPU composite achieved vertical burning(UL-94) V-0 grade and LOI value reached 29.2% when 10 wt% PZS-AHP was incorporated. Compared with those of pure TPU, the peak heat release rate(pHRR) and total heat release(THR) of TPU/10%PZS-AHP decreased by 82.2% and 42.5%, respectively. The results of CCT indicated that PZS-AHP microsphere could improve the flame retardancy of TPU composites.

关键词： polyphosphazene thermoplastic polyurethane flame retardancy aluminum hypophosphite surface polymerization

Leaching behavior and microstructure of phosphorus in converter slag

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Journal of Iron and Steel Research International 2024年第7期31卷 1646-1660页

作者： Chao-gang Zhou Jin-yue Li Qing-gong Chen Yin-ye Yang Wei Gong Li-qun Ai Shu-huan Wang Bei-yue Ma College of Metallurgy and Energy North China University of Science and TechnologyTangshan 063210HebeiChina Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081HubeiChina College of Materials Science and Engineering Guizhou Minzu UniversityGuiyang 550025GuizhouChina School of Materials and Architectural Engineering Guizhou Normal UniversityGuiyang 550025GuizhouChina School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina

Converter slag is a by-product of the steelmaking process and contains a large amount of Ca,Fe,P and other *** the phosphorus in the converter slag can be effectively extracted,the resulting phosphorus can be used as a phosphate *** in converter slag is mainly enriched in 2CaO·SiO_(2)-3CaO·P_(2)O_(5)(C_(2)S-C_(3)P)solid solution and is easily dissolved in ***,acid leaching method was used to dissolve the solid solution to extract phosphorus in converter slag,so as to realize the recycling of phosphorus resources in converter *** leaching behavior of three actual converter slags from different steel mills in acid leaching solutions composed of citric acid,sodium hydroxide,hydrochloric acid and deionized water was studied by X-ray diffraction,scanning electron microscopy combined with energy dispersive spectrometry,Fourier transform infrared spectroscopy and Raman spectroscopy to reveal the change in object image structure as well as SiO_(4) and po_(4) tetrahedron before and after acid *** results show that only a small amount of phosphorus in converter slag with too low basicity is enriched in C_(2)S-C_(3)P solid solution,resulting in poor leaching *** the converter slag has a high basicity,the removal effect of phosphorus is 70.64%-81.88%.In addition,when the basicity of converter slag is roughly the same,the dephosphorization effect of slag with high FeO content is relatively *** acid leaching will cause depolymerization behavior of SiO_(4) and po_(4) tetrahedron,so that the mole fraction of Q0(Si)(asymmetric stretching vibration of Si-O bond in SiO_(4) tetrahedron with bridge oxygen number of 0)and NBO/Si(non-bridging oxygen in silicate tetrahedra)will ***-containing solids can be obtained from the solution after acid leaching through static precipitation,and the solids have the potential to make phosphate fertilizers.

关键词： Dephosphorization converter slag Acid leaching Phosphorus Solid solution Slag structure

Fretting wear behaviour of high-nitrogen stainless bearing steel under lubrication condition

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Journal of Iron and Steel Research International 2020年第7期27卷 849-866页

作者： huan Lin Mao-sheng Yang Bai-po Shu College of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093YunnanChina Institute for Special Steel Central Iron and Steel Research InstituteBeijing 100081China

The fretting wear performance of high-nitrogen stainless bearing steel(40Cr15Mo2VN)under lubrication conditions was ***-based grease was preparedusing MoS2 and carbon nanotubes(CNTs)as *** 52100 steel ball was used in four-ball test to evaluate the extreme pressure property and wear resistance of *** four-ball test,the grease adding 0.8 mass%MoS2 and 0.8 mass%CNTs,respectively,was chosen and used for fretting *** 52100 ball and 40Cr15Mo2VN steel disc were used as the upper and lower samples for fretting *** results showed that wear power consumption increased with the increase in both sliding velocity and contact *** initial contact stress was 2.047 GPa,the main wear mechanisms were abrasive wear and plastic deformation as the velocity increased 0.028 to 0.112 m/*** the velocity was 0.028 m/s,the main wear mechanisms changed abrasive wear to adhesion wear and finally to abrasive wear and adhesion wear as the initial contact stress increased 1.788 to 2.579 *** volume loss grew sharply becaof the changes in wear *** this condition,the volume loss growth rate can be divided into three regions according to different wear power consumption ranges corresponding to different wear mechanisms.

关键词： High-nitrogen steel Sliding velocity Contact stress Adhesion wear Abrasive wear Wear power consumption

Robust Cross-Linked Na_(3)V_(2)(po_(4))_(2)F_(3) Full Sodium-Ion Batteries

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Energy & Environmental Materials 2024年第1期7卷 9-20页

作者： Jinqiang Gao Ye Tian Lianshan Ni Baowei Wang Kangyu Zou Yingchang Yang Ying Wang Craig E.Banks Dou Zhang Kechao Zhou huan Liu Wentao Deng Guoqiang Zou Hongshuai Hou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China College of Material and Chemical Engineering Tongren UniversityTongren 554300China Department of Chemistry The Chinese University of Hong KongShatinN.T.Hong Kong S.A.R.China Faculty of Science and Engineering Manchester Metropolitan UniversityManchester UK State Key Laboratory of powder Metallurgy Central South UniversityChangsha 410083China School of Materials Science and Engineering Hunan Provincial Key Lab of Advanced Materials for New Energy Storage and ConversionHunan University of Science and TechnologyXiangtan 411201China School of Materials and Engineering Zhengzhou UniversityZhengzhou 450001China

Sodium-ion batteries(SIBs)have rapidly risen to the forefront of energy storage systems as a promising supplementary for Lithium-ion batteries(LIBs).Na_(3)V_(2)(po_(4))_(2)F_(3)(NVPF)as a common cathode of SIBs,features the merits of high operating voltage,small volume change and favorable specific energy ***,it suffers from poor cycling stability and rate performance induced by its low intrinsic ***,we propose an ingenious strategy targeting superior SIBs through cross-linked NVPF with multi-dimensional nanocarbon frameworks composed of amorphous carbon and carbon nanotubes(NVPF@C@CNTs).This rational design ensures favorable particle size for shortened sodium ion transmission pathway as well as improved electronic transfer network,thus leading to enhanced charge transfer kinetics and superior cycling *** from this unique structure,significantly improved electrochemical properties are obtained,including high specific capacity(126.9 mAh g^(-1)at 1 C,1 C=128 mA g^(-1))and remarkably improved long-term cycling stability with 93.9%capacity retention after 1000 cycles at 20 *** energy density of 286.8 Wh kg^(-1)can be reached for full cells with hard carbon as anode(NVPF@C@CNTs//HC).Additionally,the electrochemical performance of the full cell at high temperature is also investigated(95.3 mAh g^(-1)after 100 cycles at 1 C at 50℃).Such nanoscale dual-carbon networks engineering and thorough discussion of ion diffusion kinetics might make contributions to accelerating the process of phosphate cathodes in SIBs for large-scale energy storages.

关键词： dual-nanocarbon networks full sodium-ion battery ion transfer kinetics Na_(3)V_(2)(po_(4))_(2)F_(3) NASICON structure

Dense-Structured Network Based Bearing Remaining Useful Life Prediction System

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Computer Modeling in Engineering & Sciences 2022年第10期131卷 133-151页

作者： Ping-huan Kuo Ting-Chung Tseng po-Chien Luan Her-Terng Yau Department of Mechanical Engineering National Chung Cheng UniversityChiayi62102Taiwan Advanced Institute of Manufacturing with High-Tech Innovations(AIM-HI) National Chung Cheng UniversityChiayi62102Taiwan

This work is focused on developing an effective method for bearing remaining useful life *** method is useful in accurately predicting the remaining useful life of bearings so that machine damage,production outage,and human accidents caused by unexpected bearing failure can be *** study uses the bearing dataset provided by FEMTO-ST Institute,Besancon,*** study starts with the exploration of neural networks,based on which the biaxial vibration signals are modeled and *** paper introduces pre-processing of bearing vibration signals,neural network model training and adjustment of training *** model is trained by optimizing model parameters and verifying its performance through *** proposed model’s superiority is also confirmed through a comparison with other *** this study,the neural network model is trained with various types of bearing data and can successfully predict the remaining useful *** algorithm proposed in this study achieves a prediction accuracy of coefficient of determination as high as 0.99.

关键词： Bearing neural network remaining useful life prediction machine learning

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独词句研究:现状与展望

外语学刊 2024年第4期 31-37页

作者：黄弋桓杜世洪重庆交通大学外国语学院重庆400074 西南大学外国语学院重庆400715

独词句是一种特殊的语言现象,它在形式上极度简化,却能完成一个句子的功能。目前国内的独词句研究主要在非主谓句范畴内开展,国外则是在叹词范畴内讨论。本文总结独词句的研究现状,包括对独词句性质与地位的传统认识,分析传统认识存在... 详细信息

独词句是一种特殊的语言现象,它在形式上极度简化,却能完成一个句子的功能。目前国内的独词句研究主要在非主谓句范畴内开展,国外则是在叹词范畴内讨论。本文总结独词句的研究现状,包括对独词句性质与地位的传统认识,分析传统认识存在的问题,说明独词句研究的关键在于解决其形式与功能上的不匹配。对此,弗雷格的命题函数理论与维特根斯坦的语言游戏论可以提供解决独词句问题的新思路,据此建立起独词句的新研究范式,推进独词句研究的深入发展。

关键词：独词句性质地位命题函数理论语言游戏论饱和

EZ-Manipulator:Designing a mobile,fast,and ambiguity-free 3D manipulation interface using smartphones

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Computational Visual Media 2018年第2期4卷 139-147页

作者： po-huan Wseng Shih-hsuan Hung Pei-Ying Chiang Chih-Yuan Yao Hung-Kuo Chu "National Tsing Hua University" Hsinchu 30013TaiwanChina. "National Taiwan University of Science and Technology" Taipei 10607TaiwanChina. "National Taipei University of Technology" Taipei 10607TaiwanChina.

Interacting with digital contents in 3 D is an essential task in various applications such as modeling packages, gaming, virtual reality, etc. Traditional interfaces using keyboard and mouse or trackball usually require a non-trivial amount of working space as well as a learning process. We present the design of EZ-Manipulator, a new 3 D manipulation interface using smartphones that supports mobile, fast, and ambiguity-free interaction with 3 D objects. Our system leverages the built-in multi-touch input and gyroscope sensor of smartphones to achieve 9 degrees-of-freedom axis-constrained manipulation and free-form *** EZ-Manipulator to manipulate objects in 3 D is easy. The user merely has to perform intuitive singleor two-finger gestures and rotate the hand-held device to perform manipulations at fine-grained and coarse levels respectively. We further investigate the ambiguity in manipulation introduced by indirect manipulations using a multi-touch interface, and propose a dynamic virtual camera adjustment to effectively resolve the ambiguity. A preliminary study shows that our system has significant lower task completion time compared to conventional use of a keyboard–mouse interface, and provides a positive user experience to both novices and experts.

关键词： 3D manipulation interface interaction technique multi-touch gyroscope sensorl mobile device input device