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Journal of Modern Power Systems and Clean Energy 2024年第2期12卷 405-414页

作者： hao Liu Fengwei Liang tianyu Hu Jichao Hong Huimin Ma School of Computer and Communication Engineering University of Science and Technology BeijingBeijingChina School of Mechanical Engineering University of Science and Technology BeijingBeijingChina IEEE

Accurate prediction of the state-of-charge(SOC)of battery energy storage system(BESS)is critical for its safety and lifespan in electric vehicles.To overcome the imbalance of existing methods between multi-scale feature fusion and global feature extraction,this paper introduces a novel multi-scale fusion(MSF)model based on gated recurrent unit(GRU),which is specifically designed for complex multi-step SOC prediction in practical BESSs.Pearson correlation analysis is first employed to identify SOC-related parameters.These parameters are then input into a multi-layer GRU for point-wise feature extraction.Concurrently,the parameters undergo patching before entering a dual-stage multi-layer GRU,thus enabling the model to capture nuanced information across varying time intervals.Ultimately,by means of adaptive weight fusion and a fully connected network,multi-step SOC predictions are rendered.Following extensive validation over multiple days,it is illustrated that the proposed model achieves an absolute error of less than 1.5%in real-time SOC prediction.

关键词： Electric vehicle battery energy storage system(BESS) state-of-charge(SOC)prediction gated recurrent unit(GRU) multi-scale fusion(MSF).

Experimental Study on the Performance of ORC System Based on Ultra-Low Temperature Heat Sources

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Energy Engineering 2024年第1期121卷 145-168页

作者： tianyu Zhou Liang hao Xin Xu Meng Si Lian Zhang College of Mechanical Engineering Tianjin University of Science&TechnologyTianjin300222China School of Energy Engineering Tianjin Sino-German University of Applied SciencesTianjin300350China Tianjin“The Belt and Road”Joint Laboratory Tianjin Sino-German University of Applied SciencesTianjin300350China

This paper discussed the experimental results of the performance of an organic Rankine cycle(ORC)system with an ultra-low temperature heat source.The low boiling point working medium R134a was adopted in the system.The simulated heat source temperature(SHST)in this work was set from 39.51°C to 48.60°C by the simulated heat source module.The influence of load percentage of simulated heat source(LPSHS)between 50%and 70%,the rotary valve opening(RVO)between 20%and 100%,the resistive load between 36Ωand 180Ωor the no-load of the generator,as well as the autumn and winter ambient temperature on the system performance were studied.The results showed that the stability of the system was promoted when the generator had a resistive load.The power generation(PG)and generator speed(GS)of the system in autumn were better than in winter,but the expander pressure ratio(EPR)was lower than in winter.Keep RVO unchanged,the SHST,the mass flow rate(MFR)of the working medium,GS,and the PG of the system increased with the increasing of LPSHS for different generator resistance load values.When the RVO was 60%,LPSHS was 70%,the SHST was 44.15°C and the resistive load was 72Ω,the highest PG reached 15.11 W.Finally,a simulation formula was obtained for LPSHS,resistance load,and PG,and its correlation coefficient was between 0.9818 and 0.9901.The formula can accurately predict the PG.The experimental results showed that the standard deviation between the experimental and simulated values was below 0.0792,and the relative error was within±5%.

关键词： ORC load percentage of simulated heat source resistive load rotary valve opening power generation

Large-Area Gravure-Printed AgNWs Electrode on Water/Oxygen Barrier Substrate for Long-Term Stable Large-Area Flexible Organic Solar Cells

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Chinese Journal of Chemistry 2024年第5期42卷 478-484页

作者： hao Wang Yaqin Pan Yunfei Han Zhuo Chen tianyu Liu Lianping Zhang Qun Luo Chang-Qi Ma Printable Electronics Research Center & i-Lab Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences (CAS)SuzhouJiangsu215123 China Nano Science and Technology Institute University of Science and Technology of China166 Ren Ai RoadSEID SIPSuzhouJiangsu215123 China

Large-area AgNWs electrodes(25 cm×10 cm)were fabricated through roll-to-roll printing on the polyvinyl alcohol(PVA)modified water and oxygen barrier substrate.The modification of the barrier film with PVA improved the wettability of silver nanowires on the barrier films and led to the formation of homogenous large-area AgNWs networks.The mechanical flexibility,especially the adhesion force between the silver electrode and the barrier film substrate was dramatically improved through PVA modification.The efficiency of 13.51%for the flexible OSCs with an area of 0.64 cm2 was achieved based on the PET/barrier film/PVA/AgNWs electrode.The long-term stability showed the flexible OSCs based on the PET/barrier film/PVA/AgNWs electrode have a significantly improved stability relative to the device on PET/AgNWs electrode,and comparable air stability as the rigid device with glass/ITO device.The unencapsulated devices maintained nearly 50%of the original efficiency after storage for 600 h in air.After a simple top encapsulation,the flexible devices remained at 60%of the initial efficiency after 2000 h in the air.Therefore,the flexible AgNWs electrode based on the barrier film would have the potential to improve the air storage stability of organic flexible solar cells.

关键词： Flexible organic solar cell AgNWs electrode Air storage stability Barrier films substrate Energy conversion Flexible electronics Interface

Organic heterojunction synaptic device with ultra high recognition rate for neuromorphic computing

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Nano Research 2024年第6期17卷 5614-5620页

作者： Xuemeng Hu Jialin Meng Tianyang Feng tianyu Wang hao Zhu Qingqing Sun David Wei Zhang Lin Chen School of Microelectronics State Key Laboratory of Integrated Chips and SystemsFudan UniversityShanghai 200433China National Integrated Circuit Innovation Center Shanghai 201203China

Traditional computing structures are blocked by the von Neumann bottleneck,and neuromorphic computing devices inspired by the human brain which integrate storage and computation have received more and more attention.Here,a flexible organic device with 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene(C8-BTBT)and 2,9-didecyldinaphtho[2,3-b:2′,3′-f]thieno[3,2-b]thiophene(C10-DNTT)heterostructural channel having excellent synaptic behaviors was fabricated on muscovite(MICA)substrate,which has a memory window greater than 20 V.This device shows better electrical characteristics than organic field effect transistors with single organic semiconductor channel.Furthermore,the device simulates organism synaptic behaviors successfully,such as paired-pulse facilitation(PPF),long-term potentiation/depression(LTP/LTD)process,and transition from short-term memory(STM)to long-term memory(LTM)by optical and electrical modulations.Importantly,the neuromorphic computing function was verified using the Modified National Institute of Standards and Technology(MNIST)pattern recognition,with a recognition rate nearly 100%without noise.This research proposes a flexible organic heterojunction with the ultra-high recognition rate in MNIST pattern recognition and provides the possibility for future flexible wearable neuromorphic computing devices.

关键词： organic heterojunction neuromorphic computing synapse behaviors optical modulation Modified National Institute of Standards and Technology(MNIST)pattern recognition

The structure-performance correlation of bulk-heterojunction organic solar cells with multi-length-scale morphology

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Science China Chemistry 2022年第8期65卷 1634-1641页

作者： tianyu hao Wenkai Zhong Shifeng Leng Rui Zeng Ming Zhang Lei Zhu Yankang Yang Jingnan Song Jinqiu Xu Guanqing Zhou Yecheng Zou Yongming Zhang Feng Liu School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesIn-situ Center for Physical ScienceCenter of Hydrogen ScienceShanghai Key Lab of Electrical Insulation&Thermal AgingShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Fluorinated Functional Membrane Materials Shandong Dongyue Future Hydrogen Energy Materials CompanyZibo 256401China

We build a general multi-length-scale morphology model with mixing phase and pure phase fibril structure,and simulate corresponding organic solar cells performance.Systematical multi-length-scale morphology optimization process by changing the proportion of mixing phase and pure phase in different period width cases shows a clear correlation between period width and device performance that a smaller period width with appropriate proportion of mixing phase and fibril structure is advantageous to achieve high-performance devices.Experiments on multiple donor/acceptor blends have been carried out by varying the composition and processing condition,which afford good structure-performance correlation that supports the model prediction.It is demonstrated that building such a multi-length-scale morphology merging the synergistic effects of mixing and pure phases is indeed an imperative avenue to improve device efficiency.

关键词： multi-length-scale morphology simulations organic photovoltaics morphology-performance relationship

Design Rules of the Mixing Phase and Impacts on Device Performance in High-Efficiency Organic Photovoltaics

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Research 2022年第4期2022卷 621-631页

作者： Jingnan Song Ming Zhang tianyu hao Jun Yan Lei Zhu Guanqing Zhou Rui Zeng Wenkai Zhong Jinqiu Xu Zichun Zhou Xiaonan Xue Chun-Chao Chen Weihua Tang Haiming Zhu Zaifei Ma Zheng Tang Yongming Zhang Feng Liu School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative MoleculesCenter of Hydrogen ScienceShanghai Key Lab of Electrical Insulation Thermal AgingShanghai Jiao Tong UniversityShanghai 200240China Department of Physics Imperial Collge LondonLondon SW72AZUK School of Materials Science and Engineering Shanghai Jiao Tong UniversityShanghai 200240China Institute of Flexible Electronics(IFE Future Technologies)Xiamen UniversityXiamen 361005China Department of Chemistry Zhejiang UniversityHangzhou 310027China Center for Advanced Low-Dimension Materials State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620China State Key Laboratory of Fluorinated Functional Membrane Materials and Dongyue Future Hydrogen Energy Materials Company ZiboCityShandongProvince 256401China

In nonfullerene acceptor-(NFA-)based solar cells,the exciton splitting takes place at both domain interface and donor/acceptor mixture,which brings in the state of mixing phase into focus.The energetics and morphology are key parameters dictating the charge generation,diffusion,and recombination.It is revealed that tailoringthe electronic properties of the mixing region by doping with larger-bandgap components could reduce the density of state but elevate the filling state level,leading to improved open-circuit voltage(V_(OC))and reduced recombination.The monomolecular and bimolecular recombinations are shown to be intercorrelated,which show a Gaussian-like relationship with V_(OC) and linear relationship with short-circuit current density(JSC)and fill factor(FF).The kinetics of hole transfer and exciton diffusion scale with JSC similarly,indicating the carrier generation in mixing region and crystalline domain are equally important.From the morphology perspective,the crystalline order could contribute to V_(OC) improvement,and the fibrillar structure strongly affects the FF.These observations highlight the importance of the mixing region and its connection with crystalline domains and point out the design rules to optimize the mixing phase structure,which is an effective approach to further improve device performance.

关键词： mixing crystalline diffusion

大幅宽SAR图像嵌入式舰船实时检测系统设计

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计算机工程与应用 2024年第1期60卷 301-309页

作者：陆天宇徐湛崔红元龚昊王琤北京信息科技大学信息与通信工程学院北京100101 中国科学院大学计算机科学与技术学院北京100089 北京雷鹰科技有限公司北京100080

针对星载或机载高分辨率合成孔径雷达(synthetic aperture radar,SAR)实时成像后的大幅宽SAR图像舰船实时检测的应用需求,传统的基于FPGA+DSP的嵌入式系统很难同时实现SAR成像处理和基于人工智能技术的大幅宽SAR图像舰船实时检测,为此... 详细信息

针对星载或机载高分辨率合成孔径雷达(synthetic aperture radar,SAR)实时成像后的大幅宽SAR图像舰船实时检测的应用需求,传统的基于FPGA+DSP的嵌入式系统很难同时实现SAR成像处理和基于人工智能技术的大幅宽SAR图像舰船实时检测,为此设计了一种基于3U VPX FPGA+GPU架构的大幅宽SAR图像嵌入式舰船实时检测系统;提出了一种基于YOLOv5s的舰船检测模型,采用基于L2-范数稀疏性惩罚的缩放因子控制法进行轻量化,轻量化舰船检测模型的参数量减小了47.39%,计算量减少了18.67%,平均检测精度为0.968;将轻量化舰船检测模型应用于大幅宽SAR图像嵌入式舰船实时检测系统,并针对典型的10 km×10 km的大幅宽图像应用场景,设计开发基于多线程技术和基于GPU的众核并行计算技术的大幅宽SAR图像嵌入式实时检测系统软件;通过公开的SAR数据集进行功能验证和性能评估,该系统能够满足不同分辨率的大幅宽SAR图像舰船实时检测需求。

关键词：合成孔径雷达(SAR) YOLOv5s 轻量化图形处理器(GPU) 实时舰船检测

地铁隧道车载融合定位系统及精度校正算法研究

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测绘通报 2024年第4期 83-89页

作者：李天宇许献磊周东林王浩张照太煤炭精细勘探与智能开发全国重点实验室北京100083 中国矿业大学(北京)地球科学与测绘工程学院北京100083

地铁隧道安全隐患综合检测车可实现隧道衬砌及表观隐患的快速检测。受限于地铁隧道封闭的地下环境及隧道内外部复杂的结构环境,当前隧道内单一定位技术仍存在定位精度低、累积误差大、多源采集不同步导致的定位信息“打架”等难题。本... 详细信息

地铁隧道安全隐患综合检测车可实现隧道衬砌及表观隐患的快速检测。受限于地铁隧道封闭的地下环境及隧道内外部复杂的结构环境,当前隧道内单一定位技术仍存在定位精度低、累积误差大、多源采集不同步导致的定位信息“打架”等难题。本文开发了一种地铁隧道车载融合定位系统及精度校正算法,包括车载高精度编码信息采集和视觉图像采集系统、融合定位算法、精度校正算法、多源信息坐标转换矩阵等内容。相较已有定位方法,该融合定位系统可实现在直道和弯道条件下检测车车载装备和隧道安全隐患的快速动态融合定位。室内室外测试结果表明,区间的定位精度可达10 cm,地铁内直线测试区间300 m内和曲线测试区间100 m内相对误差控制小于等于0.06%。室内模型试验和现场试验结果验证了该融合定位系统及精度校正算法的有效性和稳定性,为地铁隧道安全隐患的快速检测定位和隧道安全运营提供了技术支撑。

关键词：地铁隧道隐患探测融合定位精度校正快速检测

Photophysics, morphology and device performances correlation on non-fullerene acceptor based binary and ternary solar cells

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Journal of Energy Chemistry 2020年第8期29卷 180-187,I0007页

作者： Guanqing Zhou Hong Ding Lei Zhu Chaoqun Qiu Ming Zhang tianyu hao Wei Feng Yongming Zhang Haiming Zhu Feng Liu School of Physics and Astronomy and Collaborative Innovation Center of IFSA(CICIFSA)Shanghai Jiao Tong UniversityShanghai 200240China School of Chemistry and Chemical Engineering and Center for Advanced Electronic Materials and DevicesShanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Luminescent Materials and Devices South China University of TechnologyGuangzhou 510640GuangdongChina Department of Chemistry Zhejiang UniversityHangzhou 310027ZhejiangChina State Key Laboratory of Fluorinated Materials Zibo 256401ShandongChina

Non-fullerene acceptor(NFA) based organic solar cells(OSCs) are of high efficiency and low energy loss and low recombination features, which is owing to the advantage of non-fullerene acceptors. The photophysics investigation of non-fullerene solar cells, in comparing to fullerene based analogue as well as mixed acceptor ternary blends could help to understand the working mechanism of NFA functioning mechanism. We choose PBDB-T donor, the fullerene derivative PC71 BM acceptor, and the non-fullerene acceptor ITIC as the model system, to construct binary and ternary solar cells, which then subject to ultrafast spectroscopy investigation. The charge transfer pathway in binary and ternary blends is revealed.And it is seen that ITIC leads to a faster exciton separation and exciton diffusion. ITIC in blends suppresses the geminate recombination and shows smaller amount of charge transfer states, which is beneficial for the device performance. And the addition of ITIC enhances the crystallinity for both donor and acceptor leads to a morphology change of forming bicontinuous crystalline networks and phase separation. In a consequence, fill factor and JSC, increase dramatically for the related OSC.

关键词： Non-fullerene electron acceptors Charge transfer Recombination Crystallinity

Defect passivation by nontoxic biomaterial yields 21% efficiency perovskite solar cells

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Journal of Energy Chemistry 2021年第4期30卷 265-271页

作者： Shaobing Xiong tianyu hao Yuyun Sun Jianming Yang Ruru Ma Jiulong Wang Shijing Gong Xianjie Liu Liming Ding Mats Fahlman Qinye Bao Key Laboratory of Polar Materials and Devices Department of Electronic ScienceSchool of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China School of Chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200025China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006ShanxiChina Laboratory of Organic Electronics ITNLinköping UniversitySE-60174 NorrköpingSweden Wallenberg Wood Science Center Linköping UniversitySE-60174 NorrköpingSweden Center for Excellence in Nanoscience(CAS) Key Laboratory of Nanosystem and Hierarchical Fabrication(CAS)National Center for Nanoscience and TechnologyBeijing 100190China

Defect passivation is one of the most important strategies to boost both the efficiency and stability of perovskite solar cells(PSCs).Here,nontoxic and sustainable forest-based biomaterial,betulin,is first introduced into perovskites.The experiments and calculations reveal that betulin can effectively passivate the uncoordinated lead ions in perovskites via sharing the lone pair electrons of hydroxyl group,promoting charge transport.As a result,the power conversion efficiencies of the p-i-n planar PSCs remarkably increase from 19.14%to 21.15%,with the improvement of other parameters.The hydrogen bonds of betulin lock methylamine and halogen ions along the grain boundaries and on the film surface and thus suppress ion migration,further stabilizing perovskite crystal structures.These positive effects enable the PSCs to maintain 90%of the initial efficiency after 30 days in ambient air with 60%±5%relative humidity,75%after 300 h aging at 85℃,and 55%after 250 h light soaking,respectively.This work opens a new pathway for using nontoxic and low-cost biomaterials from forest to make highly efficient and stable PSCs.

关键词： Perovskite solar cells Defect passivation Nontoxic biomaterial Efficiency