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Effect of 1070 nm laser intensity on parameters of In_(0.3)Ga_(0.7)As solar cell

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Chinese Optics Letters 2019年第3期17卷 66-70页

作者： Guangji Li Hongchao Zhang Chengmin Wang Yunxiang Pan Jian Lu Dayong Zhou School of science Nanjing University of Science and Technology College of Mechanical Engineering Huaian Vocational College of Information Technology State Key Laboratory of High-Efficiency Power Conversion Shanghai Institute of Space Power-Sources

The photoelectric properties of In_(0.3)Ga_(0.7) As solar cells applied in laser wireless power transmission(LWPT) were studied when they were irradiated by 1070 nm continuous wave(CW) laser of various intensities. The influences of laser intensity on solar cell parameters extracted by the pollination algorithm were analyzed *** show that the conversion efficiency of the cell rose to the maximum and then decreased rapidly in the laser intensity range of 50–900 mW/cm2. With higher energy laser irradiation, the rise of ideality factor and reverse saturation current would lead to the degradation of voltage at the maximum power point, which was the main reason for the decrease of conversion efficiency. The results provide the basis for choosing the appropriate input energy in the case of different transmission systems.

关键词： 1070 nm laser intensity parameters In0.3Ga0.7As solar cell

基于机器学习的舌象形质诊断分析研究现状与展望

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Digital Chinese Medicine 2024年第1期7卷 3-12页

作者：许家佗江涛刘实上海中医药大学中医学院上海201203

基于图像的智能化诊断是中医舌诊现代化研究的重要方向。近年来,以卷积神经网络(CNNs)、Transformers等深度学习为代表的机器学习方法被广泛应用于电子计算机断层扫描(CT)、核磁共振成像(MRI)等医学影像图像分析领域,使得临床决策更加... 详细信息

基于图像的智能化诊断是中医舌诊现代化研究的重要方向。近年来,以卷积神经网络(CNNs)、Transformers等深度学习为代表的机器学习方法被广泛应用于电子计算机断层扫描(CT)、核磁共振成像(MRI)等医学影像图像分析领域,使得临床决策更加高效和精准。先进的人工智能技术也为中医舌诊医疗器械研发和数字化中医舌诊方法创造了新的机遇,促进了中医舌诊的标准化和智能化。经典图像分析方法实现了舌象的颜色数据化表达,但对于复杂的舌象形质特征如齿痕、点刺、裂纹、厚薄、腐腻、剥苔等的综合识别分析仍是当前舌诊研究面临的瓶颈问题。本文从舌象形质特征的智能分析与病证诊断应用等方面展开论述,归纳了经典的图像分析方法与深度学习方法的研究现状,梳理了舌象特征在临床疾病风险预测中的应用情况,提出了人工智能舌诊技术的机遇挑战和发展方向。总之,传统中医舌诊与人工智能技术结合,将有效提升中医舌诊的科学内涵,提升舌诊临床普适应用,推动中医诊疗模式的现代化发展。

关键词：舌象图像形质特征深度学习智能诊断舌诊

Overview of China’s 2020 Mars mission design and navigation

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Astrodynamics 2018年第1期2卷 1-11页

作者： Xiuqiang Jiang Bin Yang Shuang Li Department of Astronautics Engineering College of AstronauticsNanjing University of Aeronautics and AstronauticsNanjing210016China Space New technology Laboratory Nanjing University of Aeronautics and AstronauticsNanjing210016China

Scheduled for an Earth-to-Mars launch opportunity in 2020,the China’s Mars probe will arrive on Mars in 2021 with the primary objective of injecting an orbiter and placing a lander and a rover on the surface of the Red *** China’s 2020 Mars exploration mission to achieve success,many key technologies must be *** this paper,China’s 2020 Mars mission and the spacecraft architecture are first ***,the preliminary launch opportunity,Earth–Mars transfer,Mars capture,and mission orbits are ***,the main navigation schemes are summarized.

关键词： China’s Mars exploration mission orbiting,landing,and roaming orbit design navigation scheme

Synthesis and Electrochemical Performances of Nano-particle FePO4 and Ce-doped FePO4 Cathode Materials for Lithium Ion Batteries by Microemulsion Method

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Synthesis and Electrochemical Performances of Nano-particle ...

SYNTHESIS OF NANO-SIZED FePO4 CATHODE MATERIAL VIA A MICROEMULSION TECHNIQUE

中国材料大会2012

作者： Shiming Zhang Junxi Zhang Bocheng He Suojiong Xu Xuji Yuan Electrochemical Research Group Shanghai University of Electric Power

ISBN: (纸本)9783037856062;3037856068

Nano-sized FePO4 and Fe1-xCexPO4 （x=0.02, 0.04, 0.08） cathode materials were synthesized by microemulsion method. The samples were prepared via a microemulsion system in a H2O/cyclohexane/Triton x-100/n-butyl alcohol at different temperatures （30 ℃, 45 ℃, 50 ℃, 60 ℃） and then sintered at 380 ℃and 460 ℃ for 3 h. The thermal stability, structure and morphology were investigated by means of TG/DCS, X-ray diffraction （XRD）, field emission-scanning electron microscopy （FE-SEM）, and the electrochemical properties were characterized by cyclic voltammetry （CV） and galvanostatic charge and discharge tests. Results show that synthesis temperature has a great influence on the performances of FePO4 , and the sample synthesized at 45 ℃ shows the best performances with a diameter of about 20 nm and a high discharge initial specific capacity of 142mAh/g and retaining 123mAh/g after 20 cycles at 0.1 C. The Ce-doped FePO4 , Fe1-xCexPO4 （x=0.02, 0.04, 0.08）, can effectively improve the electrochemical properties of FePO 4 cathode materials. The Fe0.96Ce0.04PO4 exhibits an initial discharge capacity of 158.2mAh/g and retains 152mAh/g after 20 cycles at 0.1 C. Hence, Fe0.96Ce0.04PO4 is a promising candidate for cathode materials of lithium ion batteries.

关键词： Cathode materials Nano-particles FePO4 Fe1-xCexPO4 Microemulsion method

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SYNTHESIS OF NANO-SIZED FePO4 CATHODE MATERIAL VIA A MICROEM...

压电叠堆电静液作动器输出性能影响因素的实验研究（英文）

2012 China Functional Materials technology and Industry Forum

作者： Shi Ming ZHANG Jun Xi ZHANG Suo Jiong XU Xu Ji YUAN Tian TIAN Electrochemical Research Group Shanghai University of Electric Power

A novel synthetic method is developed to prepare nano-sized FePO powders used as cathode materials of lithium ion *** samples are prepared via a microemulsion system in a HO/cyclohexane/Triton x-100/n-butyl alcohol,and then sinter at different temperatures(380℃, 460℃,550℃,650℃) for *** thermal stability,structure,morphology and particle size are investigated by means of TG/DSC,X-ray diffraction(XRD),field emission-scanning electron microscopy(FE-SEM),and the electrochemical properties are characterized by cyclic voltammetry (CV) and galvanostatic charge and discharge *** show the grain size of FePO particles sintered at 460℃and 380℃for 3h ranges from 10nm to 20nm,and the crystal structure is *** initial discharge specific capacity of FePO cathode sintered at 460℃for 3h reaches 139mAhg and 110mAh/g,respectively,at 0.1C and *** sintering temperature leads to the small particles agglomeration and the crystalline growth,and the crystal structure changes from amorphous to trigonal when the sintering temperature is up to 550℃.The discharge specific capacity also decreases with the increase of the sintering *** results suggest that nano-sized particles and amorphous structure can significantly improve the performances of FePO cathode.

关键词： Iron Phosphate Microemulsion Cathode Material Lithium Ion Batteries

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机床与液压 2016年第24期44卷 1-8页

作者：郭亚子朱玉川南京航空航天大学南京210016

基于压电叠堆的电静液一体化作动器通过单向阀的整流作用将压电材料和液压系统进行整合,发挥液压系统大位移、大出力的特点和智能材料高频响、高功率密度的优势,同时避免传统液压系统复杂的分布式管路以及智能材料微位移量级太小的缺陷... 详细信息

基于压电叠堆的电静液一体化作动器通过单向阀的整流作用将压电材料和液压系统进行整合,发挥液压系统大位移、大出力的特点和智能材料高频响、高功率密度的优势,同时避免传统液压系统复杂的分布式管路以及智能材料微位移量级太小的缺陷,设计了一种压电叠堆电静液作动器。制造了样机,介绍了其工作原理并分析了其输出流量的形成机制及影响因素。在不同条件下对样机进行输出性能实验,探究影响作动器输出性能的因素并分析具体的影响。实验结果显示:输入140 V正弦偏置电压,作动器峰值流量接近1.6 L/min,峰值频率可以达到275 Hz,带负载能力超过20 kg。

关键词：压电材料电静液作动器输出性能

Corrosion Resistance of Ni-P Composite Coating on Mg Alloy:Critical Role of the Intermediate Phosphate Conversion Coating Layer for Suppressing Galvanic Couple Formation

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上海航天（中英文） 2022年第1期39卷 102-110页

作者： WANG Yuhang GUO Liangshuai ZHOU Peng ZHANG Tao WANG Fuhui Shenyang National Laboratory for Materials science Northeastern UniversityShenyang 110819LiaoningChina Tianjin aerospace Long March Rocket Manufacturing Co. Ltd.Tianjin 300462China

Electroless nickel(EN)plating can give rise to the severe galvanic corrosion of the magnesium(Mg)alloy matrix,owing to its nobler electrochemical potential than Mg *** hinder the formation of galvanic couple,an intermediate phosphate conversion coating(PCC)layer is introduced between the EN layer and the Mg alloy *** the ceramic-like PCC layer cannot be catalyzed,a low-cost Ag-activation technique is used to process the PCC layer before electroless *** cross-section morphology and element distribution of the PCC-EN composite coating indicate that the PCC intermediate layer can effectively separate the Mg alloy from the EN ***,the results of electrochemical tests suggest that the PCC-EN composite coating has a better corrosion resistance in comparison with the EN coating and AZ91D Mg alloy.

关键词： composite material structure spacecraft multilevel test measurement evaluation

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

Ultrafast laser one-step construction of 3D micro-/nanostructures achieving high-performance zinc metal anodes

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PhotoniX 2024年第1期5卷 622-640页

作者： Yanan Liu Ye Ding Zeping Liu Xingchen Li Sichao Tian Lishuang Fan Jichang Xie Liangliang Xu Jinwoo Lee Jian Li Lijun Yang Zhengzhou Research Institute Harbin Institute of TechnologyZhengzhou 450000P.R.China Suzhou Research Institute Harbin Institute of TechnologySuzhou 215104P.R.China School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150001P.R.China Defense Innovation Institute Chinese Academy of Military ScienceBeijing 100071P.R.China Institute of Medicinal Plant Development Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100193P.R.China Laboratoire Roberval UTCSorbonne UniversitesUniversite de Technologie de CompiegneCentre de recherche RoyallieuCS6031960203 Compiegne CedexFrance Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon 34141Republic of Korea School of Mechanical Engineering Beijing Institute of TechnologyBeijing 100081P.R.China

Aqueous zinc-ion batteries provide a most promising alternative to the existing lithium-ion batteries due to their high theoretical capacity,intrinsic safety,and low ***,commercializing aqueous zinc-ion batteries suffer from dendritic growth and side reactions on the surface of metallic zinc,resulting in poor *** overcome this critical challenge,here,we report a one-step ultrafast laser processing method for fabricating three-dimensional micro-/nanostructures on zinc anodes to optimize zinc nucleation and deposition *** is demonstrated that the three-dimensional micro-/nanostructure with increased specific surface area significantly reduces nucleation overpotential,as well as preferentially absorbs zinc ions to prevent dendritic protuberances and *** a result,the presence of threedimensional micro-/nanostructures on the zinc metal delivers stable zinc plating/stripping beyond 2500 h(2 mA cm-2/1 mAh cm-2)in symmetric cells,a high Coulombic efficiency(99.71%)in half cells,and moreover an improved capacity retention(71.8%)is also observed in full *** intriguingly,the pouch cell with three-dimensional micro-/nanostructures can operate across various bending states without severely compromising *** work provides an effective strategy to construct ultrafine and high-precision three-dimensional micro-/nanostructures achieving highperformance zinc metal anodes and is expected to be of immediate benefit to other metal-based electrodes.

关键词： Ultrafast laser processing One-step manufacturing Zinc metal anode Three-dimensional micro-/nanostructures Dendrite-free