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Ultrafast Response and Threshold Adjustable Intelligent Thermoelectric Systems for Next‑Generation Self‑Powered Remote IoT Fire Warning

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Nano-Micro Letters 2024年第11期16卷 413-428页

作者： Zhaofu Ding Gang Li Yejun wang Chunyu Du Zhenqiang Ye Lirong Liang Long‑Cheng Tang guangming Chen College of Materials Science and Engineering&College of Civil and Transportation Engineering Shenzhen UniversityShenzhen 518055People’s Republic of China College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material Technology of MoEHangzhou Normal UniversityHangzhou 311121People’s Republic of China

Fire warning is vital to human life,economy and ***,the development of effective warning systems faces great challenges of fast response,adjustable threshold and remote ***,we propose an intelligent self-powered remote IoT fire warning system,by employing single-walled carbon nanotube/titanium carbide thermoelectric composite *** flexible films,prepared by a convenient solution mixing,display p-type characteristic with excellent high-temperature stability,flame retardancy and TE(power factor of 239.7±15.8μW m^(-1) K^(-2))*** comprehensive morphology and structural analyses shed light on the underlying *** the assembled TE devices(TEDs)exhibit fast fire warning with adjustable warning threshold voltages(1–10 mV).Excitingly,an ultrafast fire warning response time of~0.1 s at 1 mV threshold voltage is achieved,rivaling many state-of-the-art ***,TE fire warning systems reveal outstanding stability after 50 repeated cycles and desired durability even undergoing 180 days of air ***,a TED-based wireless intelligent fire warning system has been developed by coupling an amplifier,analogto-digital converter and Bluetooth *** combining TE characteristics,high-temperature stability and flame retardancy with wireless IoT signal transmission,TE-based hybrid system developed here is promising for next-generation self-powered remote IoT fire warning applications.

关键词： Thermoelectric Self-powered IoT fire warning Ultrafast response Threshold adjustable

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Planar Dual-Band Electrically Small Antenna Based on Double-Negative Metamaterials

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Journal of Computer and Communications 2015年第3期3卷 27-34页

作者： Cheng Zhou guangming wang Yu Xiao Laboratory of Microwave Technology and Application Air and Missile Defense College Air Force Engineering University Xi’an China

A coaxially fed dual-band electrically small antenna based on double-negative metamaterials is presented in this letter. The antenna consists of a microstrip patch antenna as driven element and a double-negative metamaterials shell as parasitic element. Nearly complete matching of the entire system to a 50 Ω source without any matching network is achieved at 299 MHz and 837 MHz, with ka = 0.444 and 1.242 respectively. Measured performance agrees with simulations, and the proposed antenna has considerable radiation efficiency and is suitably employed for VHF and UHF applications.

关键词： Electrically Small Planar Efficiency Quality

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An Efficient Method of Generating Parameters for Pairing-Based Cryptosystems

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China Communications 2010年第4期7卷 167-171页

作者： wang Maocai DAI guangming PEN Lei ZHEN Chang QIN Ruijie School of Computer China University of Geosciences Wuhan 430074 China

Efficient computation of Tate pairing is a crucial factor for practical applications of pairing-based cryptosystems(PBC).Recently,there have been many improvements for the computation of Tate pairing,which focuses on the arithmetical operations above the finite *** this paper,we analyze the structure of Miller’s algorithm firstly,which is used to implement Tate *** on the characteristics that Miller’s algorithm will be improved tremendous if the order of the subgroup of elliptic curve group is low hamming prime,a new method for generating parameters for PBC is put forward,which enable it feasible that there is certain some subgroup of low hamming prime order in the elliptic curve group ***,we analyze the computation efficiency of Tate pairing using the new parameters for PBC and give the test *** is clear that the computation of Tate pairing above the elliptic curve group generating by our method can be improved tremendously.

关键词： Pairing-based Cryptosystems Miller's Algorithm Tate Pairing Low Hamming Elliptic Curve

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Nanostructure Study of TiO2 Films Prepared by Dip Coating Process

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Journal of Materials Science & Technology 2002年第1期18卷 31-33页

作者： S.M.Attia, Jue wang, guangming WU, Jun SHEN and Jianhua MAPohl Institute of Solid State Physics, Tongji University, Shanghai 200092, China [ Manuscript received March 30, 2001, in revised form May 31, 2001] Tongji Univ. Shanghai 200092 China

The microstructure properties of the sol-gel derived TiO2 films were studied by the atomic force microscopy (AFM). The films were prepared by dip coating process. The optical properties of the films were explained on ... 详细信息

关键词： Atomic force microscopy TiO2 thin film Sol-gel process

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3 - 93 Anti-radiation Effects of GANRA-Iike Medicine

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IMP & HIRFL Annual Report 2010年第1期 197-198页

作者： Zhu Mingyue wang Jufang Zhou guangming

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Study of the Change in Wave Velocity Ratio before and after Two Strong Earthquakes Using Airgun Source Data

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Earthquake Research in China 2019年第2期33卷 305-319页

作者： LIU Zifeng YE Beng CHEN Jia ZHOU Qingyun wang guangming PENG Guanling LI Yongli Yunnan Earthquake Agency Kunming 650224China Office of the Western Yunnan Earthquake Prediction Study Area China Earthquake AdministrationDali 671000YunnanChina

Using the signals excited by the large-volume airgun source at the Binchuan transmitting seismic station from January to June,2016,arrival-time data was acquired at four stations near the epicenter of the Eryuan MS4.5 and MS4.0 earthquakes on February 8,2016,as well as the epicenter of the Yunlong MS5.0 and Eryuan MS4.6 earthquakes on May 18,2016 through the waveform cross-correlation *** wave velocity ratio of the four stations was calculated using the single-station *** the same time,the b-value and the focal mechanism consistency parameters of the study area were also *** results show that:(1)the wave velocity ratio of each station experienced a process of decline-recovery-fast rise before the two strong earthquakes,and a significant quasi-synchronous rapid rise occurred within 3-12 days before the earthquake;(2)the timing of the rapid rise of the wave velocity ratio of the four stations before the Yunlong MS5.0 and Eryuan MS4.6 earthquakes were related to the epicentral *** station which observed the earliest increase in rapid rise is the farthest one from the epicenter,and the station where the rapid rise appeared in the latest is closest to the epicenter;(3)the form of change of the wave velocity ratio before the earthquake was different between stations located at different directions in the epicenter area;(4)the b-value and the focal mechanism consistency parameter which is commonly used to characterize the stress level both showed a downward trend before the two strong earthquakes,and were consistent with the change in the wave velocity *** to the preliminary analysis,the wave velocity ratio obtained by using airgun source can better reflect the change in the stress state of the underground medium.

关键词： Airgun source Wave velocity ratio b-value Focal mechanism consistency

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Deadbands and the Dynamic Response and Performance of Large Water Transfer Canal System

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Journal of Northeast Agricultural University(English Edition) 2009年第2期16卷 58-65页

作者： DING Zhiliang wang Changde TAN guangming GUAN Guanghua State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University Wuhan 430072 China

An operating simulation mode for multireach canal system in series under gate regulating is established. The discharge feedforward plus water lever feedback PID controller was adopted. And the performance indicators are introduced to evaluate the control effects of canal operation. Influence on dynamic response process and dynamic performance as well as the control actions of canal system are studied according to the variation of the gate deadband and water level deadband. The results showed that the larger the gate deadband, the worse, the control effect of canal system over water level, and so done the stable process of gate discharge, yet the stable process of gate opening was getting better, while the upstream gate regulation of each canal pool was less at the time when canal stabilizes; the closer to downstream end of canal, the lager steady-state error of this canal pool was, and the lager influence of gate deadband on the steady-state error as well as response time of this canal pool was; the canal system can not acquire superiority in both the control performance and control actions when only the water level deadband was established.

关键词： canal operation deadband PID controller performance indicator dynamic response dynamic performance

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淄博地区适宜与玉米间作种植的大豆品种初报

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农学学报 2024年第4期14卷 7-13页

作者：刘蔚霞路笃旭卢振宇张超翟吉庆翟乃家王光明山东省淄博市农业科学研究院山东淄博255033 山东滨州国家农业科技园区管理服务中心山东滨州256600

为了推动淄博市玉米产业健康稳定发展,调整优化种植结构,丰富多元化种植模式,实现绿色、高质、高效生产。本研究通过分析相同玉米品种与不同大豆品种间作的综合性状表现,初步筛选出适宜当地间作种植的大豆品种。结果表明,在同一气象环... 详细信息

为了推动淄博市玉米产业健康稳定发展,调整优化种植结构,丰富多元化种植模式,实现绿色、高质、高效生产。本研究通过分析相同玉米品种与不同大豆品种间作的综合性状表现,初步筛选出适宜当地间作种植的大豆品种。结果表明,在同一气象环境条件下,间作模式下玉米大斑病、黑粉病发病等级较轻,其他性状差别不大;‘荷豆23’‘、荷豆12’和‘齐黄34’等中早熟耐荫大豆品种生育期较其他品种短1~3 d,对点蜂缘蝽抗性强,主茎高度、节数和底荚高度适中且稳定,单株粒重较其他品种高0.53~1.72 g,产量分别较其他品种高88.81~214.59 kg/hm^(2)。综合来看‘,荷豆23’‘、荷豆12’和‘齐黄34’等品种适宜用于淄博地区玉米大豆间作种植。

关键词：淄博市玉米大豆间作品种

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Viscoelastic Analysis of Heavy Duty Flexible Pavements under Three-Dimensional Tire-Pavement Contact Stress

Viscoelastic Analysis of Heavy Duty Flexible Pavements under...

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ISAP2012重载沥青路面和桥面铺装专题会议

作者： guangming wang Dennis Morian Doug Frith Quality Engineering Solutions Inc.

＜正＞Layered elastic analysis has been widely used in the structural analysis of heavy duty flexible ***,asphalt mixtures are well-known to exhibit time-dependent viscoelastic behavior,and consequently,results based on elastic behavior assumptions may not truly represent responses of an asphalt concrete *** the other hand,tire-pavement contact stress is traditionally assumed to be uniform,circular and vertical for pavement design and analysis approximations,while the actual tire-pavement contact stress is three-dimensional（3-D）,non-uniform,and non-circular,

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Compact Broadband Quadrature Power Divider using D-CRLH and C-CRLH Transmission Lines

Compact Broadband Quadrature Power Divider using D-CRLH and ...

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2015年全国天线年会

作者： WU Guocheng wang guangming LIANG Jiangang Air and Missile Defense College Air Force Engineering University

In this paper,a compact broadband quadrature power divider(PD) is first proposed by using unit dual-composite right/left-handed(D-CRLH) and conventional composite right/left-handed(C-CRLH) transmission lines(TLs).The proposed quadrature PD consists of a Wilkinson PD with phase-adjusting D-CRLH/C-CRLH TLs at the *** electromagnetic characteristics of D-CRLH and C-CRLH are simulated and *** proposed quadrature PD is designed,fabricated and *** measured and simulated results are in good agreements,showing that the fabricated quadrature PD operates from 2.1 GHz to 3.1 GHz with return loss better than 10 dB,phase difference less than 10-degree and the magnitude difference less than1.5 dB,*** with the conventional quadrature PD,this one not only has better electromagnetic performances,but also realizes a 17.2% bandwidth ***,the circuit area of the proposed prototype is only 25×30 mm,and a45% size reduction is also obtained.

关键词： Quadrature power divider Dual-composite right/left-handed(D-CRLH) Conventional composite right/left-handed(C-CRLH) Bandwidth enhancement Miniaturization

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