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Energy Model for UAV Communications:Experimental Validation and Model Generalization

China Communications 2021年第7期18卷 253-264页

作者： Ning Gao Yong Zeng Jian Wang Di Wu Chaoyue Zhang Qingheng Song Jachen Qian Shi Jin National Mobile Communications Research Laboratory Southeast UniversityNanjing 210096China Purple Mountain laboratories Nanjing 211111China College of Electronic and Optical Engineering&College of Microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210023China College of Electrical and Information Engineeing Huaihua UniversityHuaihua 418008China Key Laboratory of Intelligent Control Technology for Wuling-Mountain Ecological Agriculture in Hunan Province Huaihua 418008China

Wireless communication involving unmanned aerial vehicles(UAVs)is expected to play an important role in future wireless ***,different from conventional terrestrial communication systems,UAVs typically have rather limited onboard energy on one hand,and require additional flying energy consumption on the other *** renders energy-efficient UAV communication with smart energy expenditure of paramount *** this paper,via extensive flight experiments,we aim to firstly validate the recently derived theoretical energy model for rotary-wing UAVs,and then develop a general model for those complicated flight scenarios where rigorous theoretical model derivation is quite challenging,if not ***,we first investigate how UAV power consumption varies with its flying speed for the simplest straight-and-level *** about 12,000 valid power-speed data points collected,we first apply the model-based curve fitting to obtain the modelling parameters based on the theoretical closed-form energy model in the existing *** addition,in order to exclude the potential bias caused by the theoretical energy model,the obtained measurement data is also trained using a model-free deep neural *** is found that the obtained curve from both methods can match quite well with the theoretical energy ***,we further extend the study to arbitrary 2-dimensional(2-D)flight,where,to our best knowledge,no rigorous theoretical derivation is available for the closed-form energy model as a function of its flying speed,direction,and *** fill the gap,we first propose a heuristic energy model for these more complicated cases,and then provide experimental validation based on the measurement results for circular level flight.

关键词： UAV communications energy model energy consumption flight experiments model generalization

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A High Spatial Resolution FBG Sensor Array for Measuring Ocean Temperature and Depth

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Photonic Sensors 2020年第1期10卷 57-66页

作者： Li WANG Yongjie WANG Jianfeng WANG Fang LI State Key laboratories of Transducer Technology Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China Institute of Oceanology Chinese Academy of SciencesQingdao 266071China

Exploring and understanding the ocean is an important field of scientific *** accurate and high-resolution temperature and depth profiles of the oceans over relatively short periods of time is an important basis for understanding ocean currents and other associated physical *** measuring instruments based on piezoelectric ceramics have a low spatial resolution and are not inherently ***,sensing systems based on fiber Bragg grating(FBG)have the advantage of facilitating continuous measurements and allow multi-sensor distributed ***,in this paper,an all-fiber seawater temperature and depth-sensing array is used to obtain seawater temperature and depth *** addition,by studying the encapsulation structure of the FBG sensors,this paper also solves the problem of the measurement error present in traditional FBG sensors when measuring seawater *** a theoretical analysis and seaborne test in the Yellow Sea of China,the sampling frequency of the all-fiber seawater temperature and depth profile measurement system is 1 Hz,the accuracy of the FBG sensors reaches 0.01℃,and the accuracy of the FBG depth sensors reaches 0.1%of the full *** resulting parameters for these sensors are therefore considered to be acceptable for most survey requirements in physical oceanography.

关键词： Fiber Bragg grating temperature-depth profile cross-sensitivity seaborne test verification

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在61比特可编程超导量子处理器上对量子多体态进行量子神经元感知

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Science Bulletin 2023年第9期68卷 906-912,M0004页

作者：龚明黄合良王石宇郭楚李少炜吴玉林朱庆玲赵有为郭少俊钱浩然叶杨森查辰陈福升应翀余家乐范道金吴大超苏红邓辉荣皓张凯莉曹思睿林金徐昱孙丽华郭成李娜梁福田 Akitada Sakurai Kae Nemoto William JMunro 霍永恒陆朝阳彭承志朱晓波潘建伟 Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences University of Science and Technology of ChinaHefei 230026China Shanghai Research Center for Quantum Science and CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of ChinaShanghai 201315China Hefei National Laboratory University of Science and Technology of ChinaHefei 230088China Henan Key Laboratory of Quantum Information and Cryptography Zhengzhou 450000China Okinawa Institute of Science and Technology Graduate University Onna-son 904-0495Japan NTT Basic Research laboratories and Research Center for theoretical Quantum Physics Atsugi 243-0198Japan National Institute of Informatics Chiyoda-ku 101-8430Japan School of Multidisciplinary Science Department of InformaticsSOKENDAI(the Graduate University for Advanced Studies)Chiyoda-ku 101-8430Japan

对具有不同性质和物相的多体量子态进行分类是量子多体物理学中最基本的任务之一.然而,由于巨大数量的相互作用的粒子所产生的指数级的复杂性,大规模量子态的分类对于经典的方法来说极具挑战性.本文提出了一种新的方法,称为量子神经元感... 详细信息

对具有不同性质和物相的多体量子态进行分类是量子多体物理学中最基本的任务之一.然而,由于巨大数量的相互作用的粒子所产生的指数级的复杂性,大规模量子态的分类对于经典的方法来说极具挑战性.本文提出了一种新的方法,称为量子神经元感知.利用一个61比特的超导量子处理器作为演示,作者表明该方案可以有效地对两种不同类型的多体现象,即遍历相和局域相,进行分类.量子神经元感知过程使他们能够通过只测量一个量子比特来区分这些多体物相,并提供比传统方法(如测量不平衡度)更好的分辨率.本研究证明了量子神经元感知在近期量子处理器应用的可行性和扩展性,并为探索更大规模系统中的量子多体现象开辟了新的途径.

关键词：量子态量子神经元不平衡度量子比特感知过程多体指数级相互作用

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In-situ structural evolution of Bi_(2)O_(3) nanoparticle catalysts for CO_(2) electroreduction

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International Journal of Extreme Manufacturing 2022年第3期4卷 113-120页

作者： Hongbo Wang Chongyang Tang Bo Sun Jiangchao Liu Yan Xia Wenqing Li Changzhong Jiang Dong He Xiangheng Xiao Department of Physics Hubei Nuclear Solid Physics Key LaboratoryWuhan UniversityWuhan 430072People’s Republic of China Hubei Yangtze Memory laboratories Wuhan 430205People’s Republic of China

Under the complex external reaction conditions,uncovering the true structural evolution of the catalyst is of profound significance for the establishment of relevant structure–activity relationships and the rational design of ***,the surface reconstruction of the catalyst was characterized by ex-situ methods and in-situ Raman spectroscopy in CO_(2)*** final results showed that the Bi_(2)O_(3) nanoparticles were transformed into Bi/Bi_(2)O_(3) two-dimensional thin-layer nanosheets(NSs).It is considered to be the active phase in the electrocatalytic *** Bi/Bi_(2)O_(3) NSs showed good catalytic performance with a Faraday efficiency(FE)of 94.8%for formate and a current density of 26 mA cm^(−2) at−1.01 *** the catalyst maintained a 90%FE in a wide potential range(−0.91 V to−1.21 V)and long-term stability(24 h).theoretical calculations support the theory that the excellent performance originates from the enhanced bonding state of surface Bi-Bi,which stabilized the adsorption of the key intermediate OCHO^(∗) and thus promoted the production of formate.

关键词： CO_(2)electroreduction structural evolution electrocatalysis interface formic acid

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Wideband cryogenic amplifier for a superconducting nanowire single-photon detector

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Frontiers of Information Technology & Electronic Engineering 2021年第12期22卷 1666-1676页

作者： Lianming LI Long HE Xu WU Xiaokang NIU Chao WAN Lin KANG Xiaoqing JIA Labao ZHANG Qingyuan ZHAO Xuecou TU National Mobile Communications Research Laboratory Department of Radio EngineeringSchool of Information Science and EngineeringSoutheast UniversityNanjing 210096China Purple Mountain laboratories Nanjing 211111China Research Institute of Superconductor Electronics School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China

We present a low-power inductorless wideband differential cryogenic amplifier using a 0.13-μm Si Ge Bi CMOS process for a superconducting nanowire single-photon detector(SNSPD).With a shunt-shunt feedback and capacitive coupling structure,theoretical analysis and simulations were undertaken,highlighting the relationship of the amplifier gain with the tunable design parameters of the *** this way,the design and optimization flexibility can be increased,and a required gain can be achieved even without an accurate cryogenic device *** realize a flat terminal impedance over the frequency of interest,an RC shunt compensation structure was employed,improving the amplifier’s closed-loop stability and suppressing the amplifier *** S-parameters and transient performance were measured at room temperature(300 K)and cryogenic temperature(4.2 K).With good input and output matching,the measurement results showed that the amplifier achieved a 21-d B gain with a 3-d B bandwidth of 1.13 GHz at 300 *** 4.2 K,the gain of the amplifier can be tuned from 15 to 24 d B,achieving a 3-d B bandwidth spanning from 120 k Hz to 1.3 GHz and consuming only 3.1 m *** the chip pads,the amplifier chip core area was only about 0.073 mm^(2).

关键词： Cryogenic amplifier Wideband amplifier Superconducting nanowire single-photon detector(SNSPD)

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在61比特可编程超导量子处理器上对量子多体态进行量子神经元感知（英文）

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Science Bulletin 2023年第9期 906-912页

作者：龚明黄合良王石宇郭楚李少炜吴玉林朱庆玲赵有为郭少俊钱浩然叶杨森查辰陈福升应翀余家乐范道金吴大超苏红邓辉荣皓张凯莉曹思睿林金徐昱孙丽华郭成李娜梁福田 Akitada Sakurai Kae Nemoto William J.Munro 霍永恒陆朝阳彭承志朱晓波潘建伟 Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences University of Science and Technology of China Shanghai Research Center for Quantum Science and CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China Hefei National Laboratory University of Science and Technology of China Henan Key Laboratory of Quantum Information and Cryptography Okinawa Institute of Science and Technology Graduate University National Institute of Informatics School of Multidisciplinary Science Department of Informatics SOKENDAI (the Graduate University for Advanced Studies) NTT Basic Research laboratories and Research Center for theoretical Quantum Physics

对具有不同性质和物相的多体量子态进行分类是量子多体物理学中最基本的任务之一.然而,由于巨大数量的相互作用的粒子所产生的指数级的复杂性,大规模量子态的分类对于经典的方法来说极具挑战性.本文提出了一种新的方法,称为量子神经元感...

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Design of fiber-optic collector for spectrometer based on curved mirror

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Journal of Measurement Science and Instrumentation 2017年第1期8卷 97-102页

作者： ZHUANG Xin-gang WANG Li-li SHAO Xiu-mei FANG Jia-xiong JIANG Ben-he Advanced Research Center for Optics Shandong University Jinan 250100 China School of Information Science and Engineering Shandong UniversityJinan 250100China State Key laboratories of Transducer Technology Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China State Key laboratories o f Transducer Technology Shanghai Institute of Technical Physics Chinese Academy of Sciences Shanghai 200083 China

To enlarge the detection range of traditional fiber-optic spectrometer,two rotating parabolic mirrors were first used in the design of fiber-optic collector for spectrometer,which can extend the detection range of spectrometer from centimeter-scale to50m,as a super-low altitude remote sensing detector under passive lighting *** to the performance requirements of fiber-spectrometer for optical collector,this study deduced the calculation formulae of design size of parabolic optical collector applied to different sensitivity spectrometers,different detection targets,different detection ranges and different *** on the calculation results,the model of fiber-optic collector with a diameter of16mm and a height of7.8mm was designed by *** then,TracePro,a light simulation software,was applied to ray *** simulation results of optical radiation magnification agrees well with theoretical value,and the relative error is less than0.78%.This optical collector can effectively extend the detection range of spectrometer and expand its application fields and *** with traditional refractive optical collector,it has several advantages of compact structure,low weight and low cost.

关键词： fiber-optic collector fiber-spectrometer rotating parabolic mirror infrared radiation atmospheric transmission

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100 years anniversary of the oxide cathode-a historical review

100 years anniversary of the oxide cathode-a historical revi...

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The 5th International Vacuum Electron Sources Conference(IVESC2004)

作者： Georg Gaertner Daniel den Engelsen Philips Research laboratories Weisshausstrasse 2D-52066 AachenGermany LG.Philips Displays Netherlands P.O.Box 8075600 AV EindhovenThe Netherlands

Now 100 years have passed, since Arthur Wehnelt published his famous paper entitled: "On the emission of negative ions from glowing metal compounds and related-phenomena". This paper was the start of the oxide cathode, which has become the work horse not only in cathode ray tubes with a production of about 700 million oxide cathodes in 2000, but also in low pressure gas discharge lamps with about 7 billion pieces produced in the same year. A more systematic and detailed investigation of the physical processes in the oxide cathode began about 1920. The studies of Koller and Becker proved, that the emission of the cathode is due to an excess of metallic Ba in the oxide, which is produced during cathode activation. This excess Ba was thought to be present in the form of a monoatomic Ba film, which also exhibits a much lower Ba evaporation rate than bulk Ba. Reimann 1930 and others in the next years found, that there is a close relationship between the electrical conductivity of the coating and the emission. Regarding the theoretical model and basic investigations, new insights have been obtained and some of these was presented at this conference. Thus the oxide cathode still remains a modern and challenging subject despite its 100 years history.

关键词： Cathodes Valves Tungsten Coatings Discharges Physics Earth Platinum Battery charge measurement Rectifiers

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X-ray absorption spectroscopy study of energy transport in foil targets heated by petawatt laser pulses

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Photonics Research 2018年第4期6卷 234-237页

作者： I. Y. SKOBELEV S. N. RYAZANTSEV D. D. ARICH P. S. BRATCHENKO A. Y. FAENOV T. A. PIKUZ P. DUREY L. DOEHL D. FARLEY C. D. BAIRD K. L. LANCASTER C. D. MURPHY N. BOOTH C. SPINDLOE P. MCKENNA S. B. HANSEN J. COLGAN R. KODAMA N. WOOLSEY S. A. PIKUZ Joint Institute for High Temperatures RAS Moscow 125412 Russia National Research Nuclear University "MEPhl " Moscow 115409 Russia M. V. Lomonosov Moscow State University Moscow 119991 Russia Open and Transdisciplinary Research Initiative Osaka University Osaka 565-0871 Japan Graduated School of Engineering Osaka University Osaka 565-0871 Japan York Plasma Institute Department of Physics University of York York YO10 5DD UK Central Laser Facility STFC Rutherford Appleton Laboratory Didcot OX11 0QX UK Department of Physics SUPA University of Strathclyde Glasgow G40NG UK Sandia National laboratories Albuquerque New Mexico 87123 USA theoretical Division Los Alamos National Laboratory Los Alamos New Mexico 87545 USA

X-ray absorption spectroscopy is proposed as a method for studying the heating of solid-density matter excited by secondary X-ray radiation from a relativistic laser-produced plasma. The method was developed and applied to experiments involving thin silicon foils irradiated by 0.5–1.5 ps duration ultrahigh contrast laser pulses at intensities between 0.5 × 10^(20) and 2.5 × 10^(20) W∕cm^2. The electron temperature of the material at the rear side of the target is estimated to be in the range of 140–300 eV. The diagnostic approach enables the study of warm dense matter states with low self-emissivity.

关键词：激光等离子体辐射通讯技术

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Forward link outage performance of aeronautical broadband satellite communications

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Frontiers of Information Technology & Electronic Engineering 2021年第6期22卷 790-801页

作者： Huaicong KONG Min LIN Shiwen HE Xiaoyu LIU Jian OUYANG Weiping ZHU College of Telecommunications and Information Engineering Nanjing University of Posts and TelecommunicationsNanjing 210003China School of Computer Science and Engineering Central South UniversityChangsha 410083China Purple Mountain laboratories Nanjing 210096China Department of Electrical and Computer Engineering Concordia UniversityMontrealQC H3G 1M8Canada

High-throughput satellites(HTSs) play an important role in future millimeter-wave(mm Wave) aeronautical communication to meet high speed and broad bandwidth requirements. This paper investigates the outage performance of an aeronautical broadband satellite communication system’s forward link, where the feeder link from the gateway to the HTS uses free-space optical(FSO) transmission and the user link from the HTS to aircraft operates at the mm Wave band. In the user link, spot beam technology is exploited at the HTS and a massive antenna array is deployed at the aircraft. We first present a location-based beamforming(BF) scheme to maximize the expected output signal-to-noise ratio(SNR) of the forward link with the amplify-and-forward(AF) protocol,which turns out to be a phased array. Then, by supposing that the FSO feeder link follows Gamma-Gamma fading whereas the mm Wave user link experiences shadowed Rician fading, we take the influence of the phase error into account, and derive the closed-form expression of the outage probability(OP) for the considered system. To gain further insight, a simple asymptotic OP expression at a high SNR is provided to show the diversity order and coding gain. Finally, numerical simulations are conducted to confirm the validity of the theoretical analysis and reveal the effects of phase errors on the system outage performance.

关键词： Aeronautical broadband satellite network Free-space optical(FSO)transmission High throughput mmWave communication Outage probability Phase error

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