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Nano-Micro Letters 2020年第7期12卷 121-134页

作者： Weidong Zhu zeyang zhang Dandan Chen Wenming Chai Dazheng Chen Jincheng zhang Chunfu zhang Yue Hao State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology and Shaanxi Joint Key Laboratory of Graphene School of MicroelectronicsXidian UniversityXi’an 710071People’s Republic of China College of Science Xi’an Shiyou UniversityXi’an 710065ShaanxiPeople’s Republic of China

A novel interface design is proposed for carbon-based,all-inorganic CsPbIBr2 perovskite solar cells(PSCs)by introducing interfacial voids between TiO2 electron transport layer and CsPbIBr2 *** with the general interfacial engineering strategies,this design exempts any extra modification layer in final *** importantly,the interfacial voids produced by thermal decomposition of 2-phenylethylammonium iodide trigger three beneficial e ***,they promote the light scattering in CsPbIBr2 film and thereby boost absorption ability of the resulting CsPbIBr2 ***,they suppress recombination of charge carriers and thus reduce dark saturation current density(J0)of the ***,interfacial voids enlarge built-in potential(Vbi)of the PSCs,awarding increased driving force for dissociating photo-generated charge ***,the PSC yields the optimized e ciency of 10.20%coupled with an open-circuit voltage(Voc)of 1.338 *** Voc achieved herein represents the best value among CsPbIBr2 PSCs reported ***,the non-encapsulated PSCs exhibit an excellent stability against light,thermal,and humidity stresses,since it remains^97%or^94%of its initial e ciency after being heated at 85℃for 12 h or stored in ambient atmosphere with relative humidity of 30–40%for 60 days,respectively.

关键词： All-inorganic perovskite solar cells Cs Pb IBr2 Photovoltage Interfacial engineering Stability

A hybrid data-driven and mechanism-based method for vehicle trajectory prediction

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Control Theory and Technology 2023年第3期21卷 301-314页

作者： Haoqi Hu Xiangming Xiao Bin Li zeyang zhang Lin zhang Yanjun Huang Hong Chen School of Automotive Studies Tongji UniversityShanghai 201804China Dongfeng Motor Corporation Wuhan 430000HubeiChina College of Electronics and Information Engineering Tongji UniversityShanghai 201804China

Ensuring the safe and efficient operation of self-driving vehicles relies heavily on accurately predicting their future *** approaches commonly employ an encoder-decoder neural network structure to enhance information extraction during the encoding ***,these methods often neglect the inclusion of road rule constraints during trajectory formulation in the decoding *** paper proposes a novel method that combines neural networks and rule-based constraints in the decoder stage to improve trajectory prediction accuracy while ensuring compliance with vehicle kinematics and road *** approach separates vehicle trajectories into lateral and longitudinal routes and utilizes conditional variational autoencoder(CVAE)to capture trajectory *** evaluation results demonstrate a reduction of 32.4%and 27.6%in the average displacement error(ADE)for predicting the top five and top ten trajectories,respectively,compared to the baseline method.

关键词： Vehicle trajectory prediction Rule knowledge Graph attention network-Conditional variational autoencoder Moving horizon optimization

Ultrahigh fill-factor all-inorganic CsPbBr_(3)perovskite solar cells processed from two-step solution method and solvent additive strategy

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Journal of Materiomics 2023年第4期9卷 717-724页

作者： Dazheng Chen Yibing He Gang Fan zeyang zhang Weidong Zhu He Xi Long Zhou Chunfu zhang Jincheng zhang Yue Hao State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology&Shaanxi Joint Key Laboratory of Graphene School of MicroelectronicsXidian UniversityXi'anShaanxi710071China

All-inorganic CsPbBr_(3)perovskite solar cells(PSCs)have attracted more attentions due to the excellent environmental stability,however,the wide bandgap and relatively poor crystallinity of CsPbBr_(3)have been the main obstacle to improve their power conversion efficiency(PCE).Herein,we proposed an efficient and simple strategy of precursor additive in the two-step aqueous-solution method,the resulted CsPbBr_(3)film has achieved more uniform grain size,almost pure perovskite phase,smoother surface,less defects,enhanced light absorption and longer carrier *** is due to the rapid evaporation of additive(IPA and CH_(3)OH)in the CsBr/H_(2)O precursor leads to a relatively higher local CsBr concentration on the surface of PbBr_(2),which can provide more nucleation sites and accelerate the crystallization of ***,when utilizing the optimal additive of 5%(in volume)IPA,the HTM-free carbonbased CsPbBr_(3)PSCs obtained a PCE improvement from 9.09%to 10.29%,and an ultrahigh fill factor(FF)of 85.21%.What is more,by adding 0.1 mol/L PbCl_(2)into the PbBr_(2)solution in the first step,the open circuit voltage of device has increased from 1.36 V to 1.48 V,the champion PCE reached 10.37%(steady output PCE of 10.17%),and the non-encapsulated device could maintain 85%of its initial efficiency after 50 d in the *** work provides a cost-effective approach to grow CsPbBr_(3)film and boosts the efficiency benchmark of the CsPbBr_(3)PSCs to more than 10%,it is desirable that the highly efficient and stable CsPbBr_(3)PSCs can be developed in future.

关键词： CsPbBr_(3) Aqueous solution Two-step method Solvent additive High fill factor

Accelerated Sequential Deposition Reaction via Crystal Orientation Engineering for Low-Temperature,High-Efficiency Carbon-Electrode CsPbBr_(3) Solar Cells

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Energy & Environmental Materials 2024年第1期7卷 168-175页

作者： zeyang zhang Weidong Zhu Tianjiao Han Tianran Wang Wenming Chai Jiaduo Zhu He Xi Dazheng Chen Gang Lu Peng Dong Jincheng zhang Chunfu zhang Yue Hao State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology&Shaanxi Joint Key Laboratory of Graphene School of MicroelectronicsXidian UniversityXi'an 710071China Guangzhou Wide Bandgap Semiconductor Innovation Center Guangzhou institute of technologyXidian UniversityGuangzhou 510555China Qinghai Huanghe Hydropower Development CO. LTD.Xining810008China

Low-temperature,ambient processing of high-quality CsPbBr_(3)films is demanded for scalable production of efficient,low-cost carbon-electrode perovskite solar cells(PSCs).Herein,we demonstrate a crystal orientation engineering strategy of PbBr_(2)precursor film to accelerate its reaction with CsBr precursor during two-step sequential deposition of CsPbBr_(3)*** a novel strategy is proceeded by adding CsBr species into PbBr_(2)precursor,which can tailor the preferred crystal orientation of PbBr_(2)film from[020]into[031],with CsBr additive staying in the film as CsPb_(2)Br_(5)*** calculations show that the reaction energy barrier of(031)planes of PbBr_(2)with CsBr is lower about 2.28 eV than that of(O2O)***,CsPbBr_(3)films with full coverage,high purity,high crystallinity,micro-sized grains can be obtained at a low temperature of 150℃.Carbon-electrode PSCs with these desired CsPbBr_(3)films yield the record-high efficiency of 10.27%coupled with excellent operation ***,the 1 cm^(2)area one with the superior efficiency of 8.00%as well as the flexible one with the champion efficiency of 8.27%and excellent mechanical bending characteristics are also achieved.

关键词： carbon-electrode perovskite solar cells crystal orientation engineering CsPbBr_(3) low temperature two-step sequential deposition

基于运动特征提取和2D卷积的鱼类摄食行为识别研究

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农业机械学报 2024年第6期55卷 246-253页

作者：张铮沈彦兵张泽扬上海海洋大学工程学院上海201306 上海城市电力发展有限公司上海200123

为了促进渔业装备智能化,近年来基于视频流的鱼类摄食行为识别研究受到了广泛关注。针对基于视频流的传统识别方法模型过于复杂,难以在边缘计算设备部署的问题,提出了一种轻量级的2D卷积运动特征提取网络Motion-EfficientNetV2,该网络... 详细信息

为了促进渔业装备智能化,近年来基于视频流的鱼类摄食行为识别研究受到了广泛关注。针对基于视频流的传统识别方法模型过于复杂,难以在边缘计算设备部署的问题,提出了一种轻量级的2D卷积运动特征提取网络Motion-EfficientNetV2,该网络以视频流为输入,能够有效识别鱼类摄食行为。提出的模型以EfficientNetV2为主干网络,基于TEA和ECANet构建了运动特征提取模块Motion,并将该模块嵌入到EfficientNetV2的每个Fused-MBConv模块中,使改进后的EfficientNetV2具有运动特征提取能力。同时使用ECANet对EfficientNetV2网络中的MBConv进行改进,增强其通道特征提取能力。在此基础上利用空洞卷积扩大感受野,提高大范围特征提取能力。试验结果表明,Motion-EfficientNetV2的参数量和浮点运算量分别为9.3×106和1.31×1010,优于EfficientNetV2。在TSN-ResNet50、TSN-EfficientNetV2、C3D以及R3D模型上进行对比试验,本文模型在降低参数量和浮点运算量的同时,使识别准确率提高到93.97%。该研究对于渔业装备智能化升级和科学养殖具有推动作用。

关键词：鱼类摄食行为运动特征深度学习卷积神经网络轻量化 EfficientNetV2

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基于特征构造预处理与TCN-BiGRU的池塘溶解氧预测模型

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上海海洋大学学报 2023年第5期32卷 943-952页

作者：张铮高森张泽扬上海海洋大学工程学院上海201306 上海城市电力发展有限公司上海200123

为实现对池塘溶解氧变化趋势的准确和可靠预测,降低池塘养殖风险,提出了一种基于特征构造预处理(Feature construction,FC)与时间卷积网络(Temporal convolutional network,TCN)-双向门控循环单元(Bidirectional gate recurrent unit,BiGRU)的溶解氧预测模型FC-TCN-BiGRU。通过对样本序列的统计特征、环境因子特征和季节特征进行构造,挖掘变量间深层次的相关性;采用TCN对构造特征序列进行多层卷积和降维处理,在保留全局时序特征的同时去除冗余信息;结合BiGRU对降维特征进行建模,实现对溶解氧的准确预测。另外,构建了沙猫群算法(Sand cat swarm optimization,SCSO)优化的非参数核密度估计(Kernel density estimation,KDE)对溶解氧预测误差的分布范围进行估计。实验结果表明,模型的均方误差、平均绝对误差、均方根误差和决定系数分别为0.0275、0.1432、0.1658和0.94,优于其他比较模型。同时,区间估计能够有效覆盖溶解氧的波动范围,量化预测过程中的不确定性。在池塘溶解氧的短期预测中,本模型具有较好的准确性和鲁棒性,对水产养殖的水体健康监测和养殖效率的提升具有一定的指导意义。

关键词：池塘养殖溶解氧特征构造预测模型区间估计

融合IDA-GRU和IIDW的水产养殖溶解氧时空预测模型

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农业工程学报 2023年第21期39卷 161-171页

作者：张铮贾香港张泽扬曹守启上海海洋大学工程学院上海201306 上海城市电力发展有限公司上海200123

为了提高大面积水产养殖中养殖效率、降低养殖风险、提高溶解氧(dissolved oxygen,DO)时空预测精度,该研究基于双重注意力机制改进的门控循环单元(improved gated recurrent unit based on dual attention mechanism,IDA-GRU)和改进逆... 详细信息

为了提高大面积水产养殖中养殖效率、降低养殖风险、提高溶解氧(dissolved oxygen,DO)时空预测精度,该研究基于双重注意力机制改进的门控循环单元(improved gated recurrent unit based on dual attention mechanism,IDA-GRU)和改进逆距离加权插值算法(improved inverse distance weighting interpolation algorithm,IIDW),提出了一种改进的水产养殖溶解氧时空预测模型。首先在门控循环单元(gated recurrent unit,GRU)的基础上,引入特征和时间双重注意力机制(dual attention,DA),实现溶解氧时间序列预测,其中特征注意力机制实时计算各环境特征的贡献率,不断修正各环境特征的权重,时间特征注意力机制自主地提取关键历史时刻信息;然后在溶解氧时间序列的基础上,利用IIDW算法实现溶解氧空间预测,该算法中提出的距离权重校正系数,能够实时调整插值权重。最后,在上海城市电力公司数字化生态养殖基地对该模型进行了试验验证。试验结果表明,对于溶解氧时间序列预测,该研究提出的IDA-GRU模型评价指标均方误差、均方根误差、平均绝对误差分别为0.068 7 mg^(2)/L2、0.262 1 mg/L和0.205 1 mg/L,优于对比模型;对于溶解氧空间预测,该研究提出的IIDW算法,其均方误差、均方根误差、平均绝对误差分别为0.2088 mg^(2)/L2、 0.4570 mg/L和0.3835 mg/L,均优于对比算法。该研究提出的模型提高了溶解氧时空预测精度,对提升大面积水产养殖防灾能力,实现水质智能化调控具有重要的推动作用。

关键词：模型水产养殖溶解氧预测时空预测注意力机制反距离加权插值门控循环单元

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Slow halide exchange in CsPbIBr_(2) films for high-efficiency,carbon-based,all-inorganic perovskite solar cells

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Science China Materials 2021年第9期64卷 2107-2117页

作者： zeyang zhang Dandan Chen Weidong Zhu Junxiao Ma Wenming Chai Dazheng Chen Jincheng zhang Chunfu zhang Yue Hao State Key Discipline Laboratory of Wide Band Gap Semiconductor Technology&Shaanxi Joint Key Laboratory of Graphene School of MicroelectronicsXidian UniversityXi’an710071China College of Science Xi’an Shiyou UniversityXi’an710065China

Halide exchange offers a versatile way to modify the properties of halide perovskites,but it is particularly challenging to slow the reaction rate to restrain defect growth in the ***,we propose a slow halide exchange strategy to simultaneously fine-tune the optical and microstructural characteristics of CsPbIBr_(2) films by physically pairing CsPbIBr_(2) and CH_(3)NH_(3)PbI_(3) *** a proper heating treatment is applied,halide exchange of Br^(-)and I^(-)ions between the films is activated,and the reaction rate can be well-controlled by the heating recipe,in which a high temperature can accelerate the exchange reaction,while a low temperature slows or stops *** using an optimal halide exchange temperature(110℃)and time(2 h),the parent CsPbIBr_(2) film was transformed into high-quality CsPbI_(1+x)Br_(2-x) film,featuring an extended absorption onset from 590 to 625 nm,coarsened grains,improved crystallinity,reduced surface roughness,suppressed halide phase segregation,and identical stability to the pristine ***,the efficiency of a carbon-based,all-inorganic perovskite solar cell(PSC)was boosted to 10.94%,which was much higher than that of the pristine CsPbIBr_(2) film(8.21%).The CsPbI_(1+x)Br_(2-x) PSC also possessed excellent tolerance against heat and moisture stresses.

关键词： halide exchange slow reaction rate CsPbIBr_(2) defects all-inorganic perovskite solar cells

Study on the Negative Effect of Unsprung Mass in IWM Vehicles

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Study on the Negative Effect of Unsprung Mass in IWM Vehicle...

Study on Maneuverability Control of Four In-Wheel Motor Electric Vehicle

2023中国汽车工程学会年会暨展览会

作者： Yang Ping Zhao Chunlai Yang Di Liu Kang zhang zeyang zhang Guoqing Dongfeng Motor Corporation Technical Center

The assembling of the IWM(IWM) leads to a sharp increase in unsprung *** order to study its impact on the handling and ride comfort of IWM vehicles,a three-motor four-wheel drive(4 WD) vehicle is taken as the study object,and a multi-body dynamic simulation model is established by ADAMS for the analyzing of handing performance of the *** show that the increase of unsprung mass has little effect on handling performance under national standard routine test *** on MATLAB/Simulink software,the vibration model of 1/4 vehicle is established,and the ride comfort is simulated and analyzed in frequency domain and time domain,and the influence trend of vehicle parameters on ride comfort is *** disturbance sensitivity analysis,the influence degree of vehicle parameters on ride comfort is quantified,and the general rules of IWM vehicles design and ride comfort tuning are summarized,which has guiding significance fordesign and performance tuning of IWM vehicles.

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Study on Maneuverability Control of Four In-Wheel Motor Elec...