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Journal of Advanced Dielectrics 2024年第1期14卷 25-32页

作者： Jingxiang Si Changhong Yang Rui Guo Yifan Wu Xiujuan Lin shifeng huang Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials University of Jinan Jinan 250022P.R.China

With the rapid development of modern industries,the high-temperature piezoelectric sensors that can work in extreme environments are in great *** this work,langasite(La_(3)Ga_(5)SiO_(14),LGS),as a high-temperature piezoelectric crystal with stable electro-elastic performance,is used as core element,and air and porous Al_(2)O_(3) are selected as backing layers respectively to prepare two kinds of high-temperature acoustic emission(AE)*** detection sensitivities at 25–500℃ are analyzed by the ball falling test and Hsu–Nielsen *** the condition of 25–500℃,the received amplitude signals by both sensors are maintained above 90 dB stimulated by the ZrO_(2) ceramic ball *** the Hsu–Nielsen experiment,as the temperature rising from 25℃ to 500℃,the signal amplitude of sensor with air backing layer decays from 447 mV to 365 mV,while the signal amplitude varies from 270 mV to 203 mV for the sensor with porous Al_(2)O_(3) backing ***,compared with the bandwidth of the air-backing sensor(37–183 kHz),the sensor with porous Al_(2)O_(3) backing layer broadens bandwidth to 28–273 *** results show that both these AE sensors have strong and stable response ability to AE signals at high-temperature of 500℃.Therefore,piezoelectric AE sensor based on LGS has great potential application in the ffeld of high-temperature structural health monitoring.

关键词： La_(3)Ga_(5)SiO_(14) acoustic emission sensor sensitivity structural health monitoring

基于虚拟地理环境的数字孪生流域防洪应用技术探讨

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遥感学报 2024年第5期28卷 1330-1339页

作者：李毅黄诗峰臧文斌高志国中国科学院空天信息创新研究院北京100094 中国水利水电科学研究院北京100038 天津城建大学地质与测绘学院天津300384

防洪是数字孪生流域的重要应用领域,数字孪生流域防洪应用不仅需要对流域中的自然要素进行科学表达,同时也需要对人类的活动特征进行描述。虚拟地理环境将自然要素与人文要素进行耦合研究,侧重于构建沉浸式的实验和认知环境,可以为数字... 详细信息

防洪是数字孪生流域的重要应用领域,数字孪生流域防洪应用不仅需要对流域中的自然要素进行科学表达,同时也需要对人类的活动特征进行描述。虚拟地理环境将自然要素与人文要素进行耦合研究,侧重于构建沉浸式的实验和认知环境,可以为数字孪生流域防洪中的人地关系建模以及洪水场景表达与风险认知提供新视角和新方法。本文首先介绍数字孪生流域的概念、发展现状以及虚拟地理环境的特征,然后基于虚拟地理环境提出数字孪生流域防洪应用技术框架,阐述了数字化流域场景构建、数字流域状态同步、洪水时空过程建模与实验、人地关系建模、洪水场景表达与风险认知等关键技术,最后对数字孪生流域中的沉浸式VR/AR应用、公众参与防洪等未来的发展进行了展望。

关键词：遥感虚拟地理环境数字孪生流域洪水灾害增强现实元宇宙

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卫星遥感赋能旱情监测:进展与展望

中国水利 2024年第11期 33-37页

作者：黄诗峰孙营伟中国水利水电科学研究院北京100038 水利部遥感技术应用中心北京100038 水利部防洪抗旱减灾工程技术研究中心北京100038

我国干旱灾害发生频繁,造成的损失严重。传统的干旱监测主要基于气象和水文数据,在监测面上的旱情时存在局限。基于新质生产力开展旱情监测迫在眉睫,也是新时期干旱灾害防御工作的重要着力点。近年来,随着卫星遥感技术快速发展,大范围... 详细信息

我国干旱灾害发生频繁,造成的损失严重。传统的干旱监测主要基于气象和水文数据,在监测面上的旱情时存在局限。基于新质生产力开展旱情监测迫在眉睫,也是新时期干旱灾害防御工作的重要着力点。近年来,随着卫星遥感技术快速发展,大范围、高精度、高频次、全天候对地观测能力基本形成,旱情遥感监测由早期的模型研究向业务化应用方向发展,多源遥感星地协同旱情监测、精细化旱情综合评估以及遥感、水文气象耦合的旱情预警是未来发展趋势。

关键词：遥感旱情监测新质生产力卫星进展

Crystal structure and enhanced microwave dielectric properties of the Ce_(2)[Zr_(1−x)(Al_(1/2)Ta_(1/2))_(x)]_(3)(MoO_(4))_(9) ceramics at microwave frequency

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Journal of Advanced Ceramics 2022年第3期11卷 392-402页

作者： Chao FENG Xu ZHOU Bingjing TAO Haitao WU shifeng huang Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials University of JinanJinan250022China School of Environmental and Material Engineering Yantai UniversityYantai264005China

Dense microwave dielectric ceramics of Ce_(2)[Zr_(1−x)(Al_(1/2)Ta_(1/2))_(x)]_(3)(MoO_(4))_(9)(CZMAT) (x = 0.02–0.10) were prepared by the conventional solid-state route. The effects of (Al1/2Ta1/2)^(4+) on their microstructures, sintering behaviors, and microwave dielectric properties were systematically investigated. On the basis of the X-ray diffraction (XRD) results, all the samples were matched well with Pr_(2)Zr_(3)(MoO_(4))_(9) structures, which belonged to the space group R3¯c. The lattice parameters were obtained using the Rietveld refinement method. The correlations between the chemical bond parameters and microwave dielectric properties were calculated and analyzed by using the Phillips—Van Vechten—Levine (P—V—L) theory. Excellent dielectric properties of Ce_(2)[Zr_(0.94)(Al_(1/2)Ta_(1/2))_(0.06)]_(3)(MoO_(4))_(9) with a relative permittivity (ε_(r)) of 10.46, quality factor (Q × f) of 83,796 GHz, and temperature coefficient of resonant frequency (τ_(f)) of −11.50 ppm/℃ were achieved at 850 ℃.

关键词： microwave dielectric ceramics Ce_(2)[Zr_(1−x)(Al_(1/2)Ta_(1/2))_(x)]_(3)(MoO_(4))_(9)(CZMAT) Phillips-Van Vechten-Levine(P-V-L)theory low sintering temperature

Harmonic reducer in-situ fault diagnosis for industrial robots based on deep learning

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Science China(Technological Sciences) 2022年第9期65卷 2116-2126页

作者： ZHOU Xing ZHOU HuiCheng HE YiMing huang shifeng ZHU ZhiHong CHEN JiHong School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China Foshan Institute of Intelligent Equipment Technology Foshan 528234China

The harmonic reducer is an essential kinetic transmission component in the industrial *** is easy to be fatigued and resulted in physical malfunction after a long period of ***,an accurate in-situ fault diagnosis for the harmonic reducers in an industrial robot is especially *** paper proposes a fault diagnosis method based on deep learning for the harmonic reducer of industrial robots via consecutive time-domain vibration *** the sampling signals from industrial robots are long,narrow,and channel-independent,this method combined a 1-dimensional convolutional neural network with matrix kernels(1-D MCNN)adaptive *** adjusting the size of the convolution kernels,it can concentrate on the contextual feature extraction of consecutive time-domain data while retaining the ability to process the multi-channel fusion *** proposed method is examined on a physical industrial robot platform,which has achieved a prediction accuracy of99%.Its performance is appeared to be superior in comparison to the traditional 2-dimensional CNN,deep sparse automatic encoding network(DSAE),multilayer perceptual network(MLP),and support vector machine(SVM).

关键词： harmonic reducer industrial robots fault diagnosis convolutional neural network(CNN)

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花岗岩废料与玻璃废渣制备发泡陶瓷的研究

硅酸盐通报 2024年第1期43卷 329-338页

作者：赵成琳袁文海董祎然姜葱葱何彪黄世峰程新济南大学建筑材料制备与测试技术重点实验室济南250022 重庆三原色节能建筑工程有限公司重庆401120 山东省建筑科学研究院有限公司济南250031

本文以花岗岩废料和玻璃废渣为原料、SiC为发泡剂,采用粉末烧结法制备了高孔隙率、低吸水率的全固废发泡陶瓷,探究了花岗岩废料和玻璃废渣配合比、烧结温度、发泡剂掺量对发泡陶瓷孔结构及性能的影响。结果表明:花岗岩废料形成了发泡陶... 详细信息

本文以花岗岩废料和玻璃废渣为原料、SiC为发泡剂,采用粉末烧结法制备了高孔隙率、低吸水率的全固废发泡陶瓷,探究了花岗岩废料和玻璃废渣配合比、烧结温度、发泡剂掺量对发泡陶瓷孔结构及性能的影响。结果表明:花岗岩废料形成了发泡陶瓷的骨架结构,玻璃废渣具有助熔作用;当玻璃废渣掺量为20%(质量分数)时,烧结温度降低了40℃。在1110~1150℃下制备的发泡陶瓷抗压强度为2.23~0.41 MPa,体积密度为468.41~326.31 kg/m^(3),孔隙率为79.15%~86.81%,吸水率为0.96%~1.00%,平均孔径为0.49~1.43 mm,实现了对发泡陶瓷孔径的有效调控,满足了不同应用场景对发泡陶瓷不同孔径的需求。本研究为花岗岩废料和玻璃废渣的规模化利用及不同孔径发泡陶瓷的制备提供了技术支持。

关键词：发泡陶瓷花岗岩废料玻璃废渣固废利用孔结构碳化硅

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基于容器化的云边高效应用管控方法及应用

科技导报 2024年第9期42卷 51-59页

作者：张建文毛正雄姜莹黄世锋张劲松杨本富杨仕军云南电网有限责任公司信息中心昆明650011 云南电网有限责任公司昆明供电局昆明650011 云南云电同方科技有限公司昆明650011

随着边缘计算需求激增,云边协同成为未来重要演进方向,云边协同发展的难点之一是对边缘端及运行于其上的应用的部署、管理和更新升级,而容器技术为解决以上问题提供了思路。基于容器技术轻量化、部署快、易移植的特点,研究了基于容器化... 详细信息

随着边缘计算需求激增,云边协同成为未来重要演进方向,云边协同发展的难点之一是对边缘端及运行于其上的应用的部署、管理和更新升级,而容器技术为解决以上问题提供了思路。基于容器技术轻量化、部署快、易移植的特点,研究了基于容器化的云边高效应用管控方法,包括在云边协同的总体架构中增加容器设计、基于容器进行应用协同设计;研究了云端部署更新管理机制;对容器的应用部署及更新、容器及应用下发等设计内容也进行了研究和实现。通过实验验证,该方法在系统能耗、效率、计算时延和云端CPU(中央处理器)使用效率方面得到了显著提高,进而使系统更新速率、服务器可用边缘节点数量以及处理的数据容量都有所提升,能够大幅度对云边协同系统进行优化,同时也大幅度提高了整体系统的计算能力。通过该技术的应用可以改善智慧用电平台边缘侧计算资源紧张、边缘设备异源异构、服务管理需求复杂多样等问题,实现了智慧用电云边协同平台的高效应用管控。

关键词：云边协同容器设计 Docker 基于容器的应用协同

Ferroelectric and piezoelectric properties of lead-free Li_(0.06)(K_(0.5)Na_(0.5))_(0.94)NbO_(3) thin films

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Journal of Advanced Dielectrics 2023年第3期13卷 44-51页

作者： Xinyu Bu Changhong Yang Mengjia Fan Wenxuan Wang Xiujuan Lin shifeng huang Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials University of Jinan Jinan 250022P.R.China

Lead-free(K_(0.5)Na_(0.5))NbO_(3)(KNN)and Li_(0.06)(K_(0.5)Na_(0.5))_(0.94)NbO_(3)(LKNN)thin films were fabricated by a sol-gel *** effects of Li substitution on crystal structure,microstructure and electrical properties of KNN film were systematically *** doping can enhance the ferroelectric and piezoelectric properties of KNN *** with pure KNN film,the LKNN film possesses larger remanent polarization(P_(r)~9.3μC/cm^(2))and saturated polarization(P_(s)~41.2μC/cm^(2))and lower leakage current density(~10^(−5)A/cm^(2)at 200 kV/cm).Meanwhile,a typical butterfly shaped piezoelectric response curve is obtained in the LKNN film with a high piezoelectric coefficient(d_(33)~105 pm/V).Excellent fatigue resistance(~10^(9)switching cycles)and aging resistance(~180 days)demonstrate the long-term working stability of LKNN *** findings indicate that KNN-based lead-free piezoelectric films have a broad application prospect in microelectromechanical systems(MEMS).

关键词： Lead-free thin films (K_(0.5)Na_(0.5))NbO_(3) sol-gel piezoelectric property

Formation mechanisms of Ti_(3)(Si,Al)C_(2)/Al_(2)O_(3) composites from Ti_(3)AlC_(2) and SiO via low-temperature sintering

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Journal of Advanced Ceramics 2023年第1期12卷 93-110页

作者： Zhenyu ZHANG Jun JI Yingying CHEN Deli MA Sique CHEN Hailing YANG Guopu SHI Zhi WANG Mengyong SUN Fei CHEN shifeng huang Qinggang LI Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials University of JinanJinan 250022China School of Materials Science and Engineering University of JinanJinan 250022China Institute of China North Industries Group Yantai 264003China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Ti_(3)SiC_(2)/Al_(2)O_(3) composites have attracted attention due to their excellent mechanical and electromagnetic properties,but the high temperatures(≥1400℃)required for the densification of aluminum oxide(Al_(2)O_(3))leads to the decomposition of Ti_(3)SiC_(2).To address this issue,Ti_(3)(Si_(x)Al_(1−x))C2/Al_(2)O_(3)(x represents the Si content)composites were synthesized for the first time via hot-pressing(HP)sintering and current-assisted sintering(CAS)of mixed Ti_(3)AlC_(2) and silicon monoxide(SiO)powders at 1300 and 1200℃,*** approaches produced composites with x values greater than 0.9,indicating that the compositions of the prepared composites were similar to those of Ti_(3)SiC_(2)/Al_(2)O_(3) *** synthetic mechanism involved substitution and continuous interdiffusion of Al and Si *** composite prepared by CAS at 1200℃ was compacted,whereas the composite prepared by HP had a low *** low-temperature densification mechanism is attributed to the combined effects of amorphous SiO,liquid Al,and the high heating rates for *** flexural strength and hardness of the composite prepared by CAS were also comparable to those of compacted Ti_(3)SiC_(2)/Al_(2)O_(3) composites.

关键词： aluminum oxide(Al_(2)O_(3)) current-assisted sintering(CAS) silicon monoxide(SiO) Ti_(3)(Si Al)C_(2)

Stable self-polarization in lead-free Bi(Fe_(0.93)Mn_(0.05)Ti_(0.02))O_(3)thick films

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Journal of Advanced Dielectrics 2022年第6期12卷 48-55页

作者： Mengjia Fan Xinyu Bu Wenxuan Wang Wei Sun Xiujuan Lin shifeng huang Changhong Yang Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials University of Jinan Jinan 250022P.R.China

The BiFeO3-based film is one of the most promising candidates for lead-free piezoelectric film *** this work,the 1μm-thick Bi(Fe_(0.93)Mn_(0.05)Ti_(0.02))O_(3)(BFMT)films are grown on the ITO/glass substrate using a sol-gel method combined with spin-coating and layer-by-layer annealing *** films display a large saturated polarization of 95μC/cm^(2),and a remanent polarization of 70μC/cm^(2).Especially,the films are self-poled caused by an internal bias field,giving rise to asymmetric polarization-electric field(P-E)loops with a positive shift along the x-axis.A stable self-polarization state is maintained during the applied electric field increasing to 1500 kV/cm and then decreasing *** weak dependence of P-E loops on frequency(1-50 kHz)and temperature(25-125°C)indicate that the internal bias field can be stable within a certain frequency and temperature *** results demonstrate that the self-polarized BFMT thick films can be integrated into devices without any poling process,with promising applications in micro-electro-mechanical systems.

关键词： Lead-free stable self-polarization bismuth ferrite thick films.