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外加能场辅助搅拌摩擦焊研究现状

焊接学报 2024年第4期45卷 109-119,I0009,I0010页

作者：孙广达闫中宪周利高福洋吕逸帆哈尔滨工业大学先进焊接与连接国家重点实验室哈尔滨150001 哈尔滨工业大学(威海) 山东省特种焊接技术重点实验室威海264209 中国船舶重工集团公司第七二五研究所洛阳471000

搅拌摩擦焊作为先进固相连接技术,广泛应用于航空航天等领域,轻质高强材料及异种材料连接对常规搅拌摩擦焊的发展提出了新的挑战.近年来,外加能场辅助搅拌摩擦焊技术的兴起有效地解决了异种材料连接中塑化程度不匹配和界面金属间化合物... 详细信息

搅拌摩擦焊作为先进固相连接技术,广泛应用于航空航天等领域,轻质高强材料及异种材料连接对常规搅拌摩擦焊的发展提出了新的挑战.近年来,外加能场辅助搅拌摩擦焊技术的兴起有效地解决了异种材料连接中塑化程度不匹配和界面金属间化合物导致接头脆化的问题.同时,这一技术也为解决高熔点材料流变应力大、塑性变形能力差以及焊具磨损严重、焊接效率低等问题提供了新的思路.文中综述了外加能场辅助搅拌摩擦焊的研究现状,包括感应加热、激光加热、电流加热、电弧加热和超声辅助等,从过程产热、材料流动、组织性能调控和耦合作用机制等方面分析了热能和机械能对接头微观组织和性能的影响规律,同时对未来的研究方向进行展望.

关键词：高熔点材料异种材料能场辅助搅拌摩擦焊塑性材料流动

On the Innovation,Design,Construction,and Experiments of OMEGA-Based SSPS Prototype:The sun-Chasing Project

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Engineering 2024年第5期36卷 90-101页

作者： Baoyan Duan Yiqun Zhang guangda Chen Ze Zhao Jianwei Mi Xun Li Lin Yang Xi Li Research Institute on Mechatronics Xidian UniversityXi’an 710071China Research Institute of Antenna Xidian UniversityXi’an 710071China

This study systematically introduces the development of the world’s first full-link and full-system ground demonstration and verification system for the OMEGA space solar power satellite(SSPS).First,the OMEGA 2.0 innovation design was ***,field-coupling theoretical models of sunlight concentration,photoelectric conversion,and transmitting antennas were established,and a systematic optimization design method was ***,a beam waveform optimization methodology considering both a high beam collection efficiency and a circular stepped beam shape was ***,a control strategy was developed to control the condenser pointing toward the sun while maintaining the transmitting antenna toward the ***,a high-efficiency heat radiator design method based on bionics and topology optimization was ***,a method for improving the rectenna array’s reception,rectification,and direct current(DC)power synthesis efficiencies is ***,high-precision measurement technology for high-accuracy beam-pointing control was ***,a smart mechanical structure was designed and ***,the developed SSPS ground demonstration and verification system has the capacity for sun tracking,a high concentration ratio,photoelectric conversion,microwave conversion and emission,microwave reception,and rectification,and thus satisfactory results were obtained.

关键词： OMEGA-SSPS Full-link and full-system Beam collection efficiency Circular stepped beam shape Smart structure Field coupling theoretical model `Beam pointing control

Indium-doped perovskite-related cesium copper halide scintillator films for high-performance X-ray imaging

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Photonics Research 2024年第2期12卷 369-376页

作者： RUI LIU ZHIYONG LIU CHENGXU LIN guangda NIU XUNING ZHANG BO sun TIELIN SHI GUANGLAN LIAO State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and TechnologyWuhan 430074China Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China School of Aerospace Engineering Huazhong University of Science and TechnologyWuhan 430074China

Scintillators are widely utilized in high-energy radiation detection in view of their high light yield and short fluorescence decay ***,constrained by their current shortcomings,such as complex fabrication procedures,high temperature,and difficulty in the large scale,it is difficult to meet the increasing demand for costeffective,flexible,and environment-friendly X-ray detection using traditional ***-related cesium copper halide scintillators have recently received multitudinous research due to their tunable emission wavelength,high photoluminescence quantum yield(PLQY),and excellent optical ***,we demonstrated a facile solution-synthesis route for indium-doped all-inorganic cesium copper iodide(Cs_(3)Cu_(2)I_(5))powders and a high scintillation yield flexible film utilizing indium-doped Cs_(3)Cu_(2)I_(5)*** large area flexible films achieved a PLQY as high as 90.2%by appropriately adjusting the indium doping concentration,much higher than the undoped one(73.9%).Moreover,benefiting from low self-absorption and high PLQY,the Cs_(3)Cu_(2)I_(5):In films exhibited ultralow detection limit of 56.2 n Gy/s,high spatial resolution up to 11.3 lp/mm,and marvelous relative light output with strong stability,facilitating that Cs_(3)Cu_(2)I_(5):In films are excellent candidates for X-ray medical *** work provides an effective strategy for developing environment-friendly,low-cost,and efficient scintillator films,showing great potential in the application of highperformance X-ray imaging.

关键词： properties copper halide

基于自适应神经网络观测的无电压传感器PWM整流器功率预测控制

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中国电机工程学报 2021年第3期41卷 1135-1145页

作者：肖雄武玉娟孙广达李静张勇军北京科技大学高效轧制国家工程研究中心北京市海淀区100083

模型预测控制在脉宽调制(pulse width modulation,PWM)整流器上的应用既降低了直接功率控制中的脉振又提高了动态响应速度,但是传统的模型预测功率控制(model predictive power control,MPDPC)中对未来时刻状态量的预测仅依靠模型,对模... 详细信息

模型预测控制在脉宽调制(pulse width modulation,PWM)整流器上的应用既降低了直接功率控制中的脉振又提高了动态响应速度,但是传统的模型预测功率控制(model predictive power control,MPDPC)中对未来时刻状态量的预测仅依靠模型,对模型参数变化较为敏感,功率预测精度受电压传感器的测量精度和网侧谐波变化的影响明显。为实现整流侧参数的实时辨识和提高整体的预测精度,以实现对功率的精准控制,文中在模型预测功率控制(model predictive power control,MPDPC)的基础上引入自适应神经网络电压观测器,提出基于自适应神经网络观测的无电压传感器PWM整流器功率预测控制(adaptive neural model predictive power control,ANMPDPC)策略。通过构建包含自适应神经网络辨识器和自适应神经网络滤波器的自适应电压观测器,实现网侧电压估计的同时滤除电压高次谐波对其的影响,并将电压观测器与功率二步预测相结合,进一步降低功率脉振,提高系统的响应速度和控制精度。仿真和实验结果表明,所提出的改进策略既实现了无电压传感器下的模型预测控制,又有效抑制了网侧谐波的高频干扰及参数变化对预测精度的影响。

关键词：脉宽调制整流器自适应神经网络模型预测控制直接功率控制

固相萃取-超高压液相色谱-串联质谱同时分析环境水样中四环素类和喹诺酮类抗生素

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色谱 2009年第1期27卷 54-58页

作者：孙广大苏仲毅陈猛袁东星厦门大学环境科学研究中心福建厦门361005

应用固相萃取及超高压液相色谱-质谱联用技术，建立了环境水样中4种四环素类和6种喹诺酮类抗生素的同时分析方法。样品经HLB固相萃取柱富集、净化后用甲醇洗脱，以超高压液相色谱-串联质谱仪多反应监测（MRM）离子模式定性、定量分析。... 详细信息

应用固相萃取及超高压液相色谱-质谱联用技术，建立了环境水样中4种四环素类和6种喹诺酮类抗生素的同时分析方法。样品经HLB固相萃取柱富集、净化后用甲醇洗脱，以超高压液相色谱-串联质谱仪多反应监测（MRM）离子模式定性、定量分析。以河水和海水为基质，卡巴氧为替代物进行回收率评价，4种四环素类抗生素在加标质量浓度分别为20．0ng／L和100．0ng／L时的回收率为94．0％～117．0％，相对标准偏差为2．0％～9．7％（n=4），方法的检出限均为20．0ng／L；6种喹诺酮类抗生素在加标质量浓度分别为5．0ng／L和20．0ng／L时的回收率为53．6％～93．9％，相对标准偏差为1．6％～8．1％（n=4），方法的检出限为0．4ng／L。结果表明，所建立的方法可成功地应用于近岸海域表层环境水样中目标抗生素残留的分析。

关键词：固相萃取超高压液相色谱-质谱四环素喹诺酮环境水样

High Efficiency Formamidinium-Cesium Perovskite-Based Radio-Photovoltaic Cells

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Energy & Environmental Materials 2024年第1期7卷 160-167页

作者： Runlong Gao Rui Chen Pengying Wan Xiao Ouyang Qiantao Lei Qi Deng Xinyu Guan guangda Niu Jiang Tang Wei Chen Zonghao Liu Xiaoping Ouyang Linyue Liu Sino-French Institute of Nuclear Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear TechnologyXi'an 710024China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China School of Microelectronics Xi'an Jiaotong UniversityXi'an 710049China Key Laboratory of Beam Technology of Ministry of Education College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China

Radio-photovoltaic cell is a micro nuclear battery for devices operating in extreme environments,which converts the decay energy of a radioisotope into electric energy by using a phosphor and a photovoltaic *** phosphors with high light yield and good environmental stability have been developed,but the performance of radio-photovoltaic cells remains far behind expectations in terms of power density and power conversion efficiency,because of the poor photoelectric conversion efficiency of traditional photovoltaic converters under low-light *** paper reports an radio-photovoltaic cell based on an intrinsically stable formamidinium-cesium perovskite photovoltaic converter exhibiting a wide light wavelength response from 300 to 800 nm,high open-circuit voltage(V_(oc)),and remarkable efficiency at low-light *** a He ions accelerator is adopted as a mimickedαradioisotope source with an equivalent activity of 0.83 mCi cm^(-2),the formamidinium-cesium perovskite radio-photovoltaic cell achieves a V_(oc)of 0.498 V,a short-circuit current(J_(sc))of 423.94 nA cm^(-2),and a remarkable power conversion efficiency of 0.886%,which is 6.6 times that of the Si reference radio-photovoltaic cell,as well as the highest among all radio-photovoltaic cells reported so *** work provides a theoretical basis for enhancing the performance of radio-photovoltaic cells.

关键词： formamidinium-cesium perovskite phosphor photovoltaic converter power conversion efficiency radio-photovoltaic cell

环境水样中9种三唑类农药的固相萃取-气相色谱-质谱分析

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色谱 2008年第6期26卷 704-708页

作者：游明华孙广大陈猛袁东星厦门大学环境科学研究中心福建厦门361005

应用C18柱萃取/富集,NH2柱净化,气相色谱-质谱联用技术检测,建立了环境水样中9种三唑类农药同时分析的方法。9种目标农药在0.025～0.500mg/L质量浓度范围内线性关系良好,方法的检出限为0.002～0.009μg/L。以实际水样为基底,加标质量浓... 详细信息

应用C18柱萃取/富集,NH2柱净化,气相色谱-质谱联用技术检测,建立了环境水样中9种三唑类农药同时分析的方法。9种目标农药在0.025～0.500mg/L质量浓度范围内线性关系良好,方法的检出限为0.002～0.009μg/L。以实际水样为基底,加标质量浓度为0.025μg/L和0.100μg/L时,9种目标农药的基底加标回收率和相对标准偏差(n=3)分别为68.4%～113.9%,1.6%～6.9%(河水)和70.3%～115.2%,0.8%～8.2%(海水)。该方法操作简单、灵敏度高、选择性好,符合多种农药残留分析的要求,并成功地应用于福建九龙江河口区表层水样中三唑类农药的残留状况调查。

关键词：气相色谱-质谱固相萃取三唑类农药环境水样

固相萃取-气相色谱-质谱联用同时测定河水和海水中87种农药

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色谱 2012年第3期30卷 318-326页

作者：宋伟林姗姗孙广大陈猛袁东星厦门大学环境与生态学院福建厦门361005

采用固相萃取-气相色谱-质谱联用技术,建立了河水和海水中87种农药(24种有机磷、15种有机氯、12种唑类、9种拟除虫菊酯类、5种氨基甲酸酯类、7种酰胺类及15种其他新型农药)的多残留同时分析方法。优化了影响分离效果和灵敏度的仪器参数... 详细信息

采用固相萃取-气相色谱-质谱联用技术,建立了河水和海水中87种农药(24种有机磷、15种有机氯、12种唑类、9种拟除虫菊酯类、5种氨基甲酸酯类、7种酰胺类及15种其他新型农药)的多残留同时分析方法。优化了影响分离效果和灵敏度的仪器参数,考察了固相萃取柱柱型及水样体积、pH、盐度的影响,采用NH2柱优化了净化效果,内标法和替代物法用于数据的质量控制。结果表明:在最佳条件下,各目标农药的方法检出限为0.1～6.6ng/L;以实际河水和海水为基底,在5 ng/L和20 ng/L的加标水平下,绝大多数目标农药的回收率为60%～120%,相对标准偏差(n=4)为0.01%～9.7%。该法灵敏、准确,已成功地应用于福建九龙江河口区表层水样中多种类农药的复合污染监测,检出包括5种有机磷类、3种酰胺类、4种唑类、3种氨基甲酸酯类、2种拟除虫菊酯类等农药20种。

关键词：固相萃取气相色谱-质谱农药河水海水多残留分析复合污染

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应急照明技术应用的研究

现代制造技术与装备 2017年第12期53卷 104-105页

作者：孙广大迟耀丹吉林建筑大学吉林130012

应急照明技术在人们的生活中越来越重要。本文就应急照明技术的供电方式、控制方式等进行总结与归纳,旨在使应急照明技术更合理、更节能、更安全地应用到不同的建筑中。

关键词：应急照明供电方式控制方式