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13th IEEE Data Driven Control and Learning Systems Conference, DDCLS 2024

作者： Ye, Jiaqi Zhang, Zhengjiang Hong, Zhihui Zhu, Zhiliang Zhao, Sheng Xia, Tao Wenzhou University The National and Local Joint Engineering Research Center of Electrical Digital Design Technology Wenzhou325000 China Wenzhou University The Key Laboratory of Low-Voltage Apparatus Intellectual Technology of Zhejiang Wenzhou325035 China State Grid Suzhou Suburban Power Supply Company China

ISBN: (纸本)9798350361674

The measurement data of the battery obtained by the sensor will be affected by gross errors, which will reduce the estimated accuracy of State of Charge (SOC). In order to solve the above problem, this paper proposes a lithium battery SOC estimation method, CRPF -GEDC, which is based on cost reference particle filter (CRPF) combined with gross error detection and compensation. This method detects the errors in the measurement data of lithium battery real time, classifies them and estimates the true value to compensate the abnormal measurement points to improve the accuracy of state estimation. Compared with the traditional CRPF, CRPF-GEDC has a higher robustness because it does not require accurate noise statistic characteristics of noise and can handle measurement data with different types of gross errors. The experimental results show that the proposed CRPF -GEDC can effectively suppress the impact of gross errors when estimating the SOC of lithium battery. © 2024 IEEE.

关键词： State of charge

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Bridging from the Sequence to Architecture: Graft Copolymers engineering via Successive Latent Monomer and Grafting-from Strategies

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Chinese Journal of Chemistry 2021年第5期39卷 1273-1280页

作者： Yajie Zhang Xiaohuan Cao Yang Gao Yujie Xie Zhihao Huang Zhengbiao Zhang Xiulin Zhu State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials Jiangsu Key Laboratory of Advanced Functional Polymer Design and ApplicationCollege of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhouJiangsu 215123China State Key Laboratory of Radiation Medicine and Protection Soochow UniversitySuzhouJiangsu 215123China Global Institute bf Software Technology No.5 Qingshan RoadSuzhou National Hi-Tech DistrictSuzhouJiangsu 215163China

The on-demand building copolymer structures,from sequence to architecture,is crucial in understanding the relation between pol-ymer structure and property,meanwhile motivating the innovation of polymer ***,the challenge is conspicuous for,complicated polymer structures from inherently intricate *** this work,copolymers with tailored grafting density and distributions were achieved using successive latent monomer and grafting-from *** hydroxyl group functionalized fu-ran/maleimide adduct(FMOH)was selected as the latent monomer for RAFT polymerization of an array of copolymers with tailored localization of hydroxyl group along the main *** hydroxyI group further initiated the ring opening polymerization(ROP)of L-lactide or ε-caprolactone,resulting in a library of multicomponent copolymers via grafting-from *** initiating efficiency reached to-100% with variable molecular weight(21300-58600 Da)and narrow distributions(Ð_(M)<1.25),indicating that such graft copolymers possessed controlled density and distribution of side chains as its linear *** investigation on thermal properties of the well-defined graft copolymers implied that the precise tailoring over copolymer structures at the molecule level could lead to tunable chemical/physical *** work bridged polymer from sequence to architecture,unveiled a new meth-od in creating graft copolymers with programmable structures and provided the insight into the structure/property relationship.

关键词： Sequence determination Polymers Latent Monomer Polymerization Maleimide

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Shallow Subsurface Detection with the Resonance Characteristics of Ambient Noise Recording 11

Shallow Subsurface Detection with the Resonance Characterist...

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11th International Conference on Environmental and engineering Geophysics, ICEEG 2024

作者： Wang, Guanchao Zhao, Guangmao Niu, Yongxiao Chen, Chengshen Li, Guohe Li, Peng China Railway Design Corporation Tianjin China Natl. Eng. Research Center of Digital Construction and Evaluation Technology of Urban Rail Transit Tianjin China National and Local Joint Engineering Laboratory of Rail Transit Survey & Design Tianjin China

Imaging near-surface structures, such as voids, tunnels, or high-contrast anomalies, is an essential and critical task in urban area underground engineering projects;the required accuracy is within a few meters vertically and horizontally, which poses considerable challenges to geophysical surveys in shallow subsurface detection. Geophysical methods like seismic are great tools for subsurface exploration with high resolution. Currently, since explosive sources are prohibited in urban areas, passive seismic methods that record the constant vibration signals generated by natural and human activities have become more desirable. Thus, this abstract presents a novel nondestructive geophysical approach using ambient noise recording, namely seismo-acoustic resonance imaging. This approach is mainly based on the analysis of the resonance frequencies content information within the data, related to the mechanical properties of structures under investigation. These resonance frequencies will then be translated into depth-domain images using a kind of layer-stripping strategy;Further, the images are combined with results of other geophysical methods (GRP, surface wave analysis, autocorrelation, etc.) for necessary interpretation. In practice, as a low-cost single-station geophysical technique, resonance imaging is readily applicable to a broad range of scales, which meets the need for spatial suitability, and efficiency in engineering investigations. Two examples are presented in the paper, as the first is elaborated on a known metro tunnel, and the second is demonstrated in an unknown investigation site. The results of two experiments have shown resonance imaging to be very well adapted for shallow subsurface detection. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Cost engineering

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Suppressed light-induced phase transition of CsPbBr_(2)I: Strategies, progress and applications in the photovoltaic field

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Journal of Semiconductors 2021年第7期42卷 24-36页

作者： Hushan Zhang Zhiwen Jin School of Physical Science and Technology&Key Laboratory of Special Function Materials and Structure Design(MoE)&National&Local Joint Engineering Laboratory for Optical Conversion Materials and Technology Lanzhou UniversityLanzhou 730000China

The rapid rise in the power conversion efficiency(PCE)of CsPbBr_(2)I-based perovskite solar cells(PSCs),from 4.7%in 2016 to 11.08%in 2020,render it a promising material for use in photovoltaic ***,the phase stability and current hysteresis caused by photo-induced phase segregation in CsPbBr_(2)I represent major obstacles to further improvements in the PCE for such *** this review,we describe the basic structure and optical properties of CsPbBr_(2)I,and systematically elaborate on the mechanism of the phase *** then discuss the strategies in progress to suppress phase transition in CsPbBr_(2)I,and their potential application in the photovoltaic ***,challenges and application prospects for CsPbBr2I PSCs are summarized in the final section of this article.

关键词： perovskite CsPbBr_(2)I stability phase transition phase segregation

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Band offsets and electronic properties of the Ga_(2)O_(3)/FTO heterojunction via transfer of free-standing Ga_(2)O_(3) onto FTO/glass

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Chinese Physics B 2021年第11期30卷 385-388页

作者： Xia Wang Wei-Fang Gu Yong-Feng Qiao Zhi-Yong Feng Yue-Hua An Shao-Hui Zhang Zeng Liu Department of Electrical Engineering and Automation Shanxi Institute of TechnologyYangquan 045000China School of Optoelectronic Engineering Guangdong Polytechnic Normal UniversityGuangzhou 510665China Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics International Collaborative Laboratory of 2D Materials for Optoelectronics Science and Technology of Ministry of EducationCollege of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China College of Electronic and Optical Engineering&College of Microelectronics Nanjing University of Posts and TelecommunicationsNanjing 210023China National and Local Joint Engineering Laboratory for RF Integration and Micro-Packing Technologies Nanjing University of Posts and TelecommunicationsNanjing 210023China

The determination of band offsets is crucial in the optimization of Ga_(2)O_(3)-based devices,since the band alignment types could determine the operations of devices due to the restriction of carrier transport across the heterogeneous *** this work,the band offsets of the Ga_(2)O_(3)/FTO heterojunction are studied using x-ray photoelectron spectroscopy(XPS)based on Kraut’s method,which suggests a staggered type-II alignment with a conduction band offset(DEC)of 1.66 eV and a valence band offset(DEV)of􀀀2.41 ***,the electronic properties of the Ga_(2)O_(3)/FTO heterostructure are also measured,both in the dark and under ultraviolet(UV)illuminated conditions(254 nm UV light).Overall,this work can provide meaningful guidance for the design and construction of oxide hetero-structured devices based on wide-bandgap semiconducting Ga_(2)O_(3).

关键词： Ga_(2)O_(3)/FTO heterojunction band alignment magnetron sputtering free-standing

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Accurate MTPA Control Based on Ferrari Method for IPMSM with Partial Derivative Term Calculation 27

Accurate MTPA Control Based on Ferrari Method for IPMSM with...

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27th International Conference on electrical Machines and Systems, ICEMS 2024

作者： Li, Yiyang Gu, Xin Wang, Zhiqiang Guo, Liyan Chen, Wei Li, Xinmin Li, Chen School of Electronics and Information Engineering Tiangong University Tianjin China School of Electrical Engineering Tiangong University Tianjin China Tianjin Key Laboratory of Intelligent Control of Electrical Equipment Tianjin China National Local Joint Engineering Research Center of Electrical Machine System Design and Manufacturing China Zhejiang University Advanced Electrical Equipment Innovation Center Hangzhou China

ISBN: (纸本)9784886864406

Even if the exact motor parameters are known, the MTPA strategy cannot obtain precise maximum torque per ampere (MTPA) points under large current amplitude because the partial derivative of inductance to current is ignored in the modeling process. In view of this, the MTPA mathematical model considering the partial derivative of inductance to current is established in this paper, and the MTPA point tracking error caused by ignoring the partial derivative in the modeling process based on Ferrari method is analyzed. Then, an offline-online combined method for calculating the partial derivative term is proposed to compensate the MTPA tracking error. On this basis, an MTPA control strategy based on Ferrari method considering the partial derivative of inductance to current is proposed. Experiment to verify the feasibility and effectiveness of the proposed method. © 2024 The Institute of electrical Engineers of Japan.

关键词： Permanent magnets

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Hexagonally ordered microbowl arrays decorated with ultrathin CuInS_(2) nanosheets for enhanced photoelectrochemical performance

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Journal of Energy Chemistry 2020年第12期29卷 134-142页

作者： Ming Li Le Chen Yanjie Su Huan Yin Kexiang Hu State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China School of Electronic Engineering and Automation Guilin University of Electronic TechnologyKey Laboratory of Optoelectronic Information Processing of Guangxi Colleges and Uniy/ersitiesGuilin 541004GuangxiChina Key Laboratory for Thin Film and Microfabrication of the Ministry of Education Department of Micro/Nano ElectronicsSchool of ElectronicsInformation and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China National and Local Joint Engineering Laboratory of Internet Technology on Mine School of Information and Control EngineeringChina University of Mining and TechnologyXuzhou 221008JiangsuChina School of Physics and Telecommunication Engineering Guangxi Colleges and Universities Key Lab of Complex System Optimization and Big Data ProcessingYulin Normal UniversityYulin 537400GuangxiChina

This paper demonstrates the design and fabrication of three-dimensional(3 D) hexagonally ordered microbowl arrays(MBAs) decorated with Cu In S2 nanosheets for enhanced photoelectrochemical(PEC) performance. The 3 D MBAs are fabricated by a micro-fabrication technique. The ultrathin CuInS2 nanosheets are grown on the 3 D electrodes by solvothermal transformation of Cu film. The photocurrent density of 3 D photocathode(CuInS2@MBAs) is about two times higher than that of the planar counterpart(CuInS2@Planar). The improved PEC performance can be ascribed to the elevated light trapping ability and the increased surface area for loading photocatalysts. In addition, CdS quantum dots as cocatalysts are modified onto the Cu In S2 nanosheets to further enhance the PEC activity because the formed p-n heterojunction can accelerate the separation of photogenerated carriers. As a result, the 3 D photocathode of CuInS2/CdS@MBAs shows an optimal incident photon to current efficiency of 10% at the wavelength of400 nm. It is believed that this work can be generalized to design other hierarchical 3 D photoelectrodes for improved solar water splitting.

关键词： Microbowl array CuInS_(2) Nanosheet Photocathode Photoelectrochemical performance

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Unsteady slipstream of a train passing through a high-speed railway tunnel with a cave

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Transportation Safety and Environment 2022年第4期4卷 107-120页

作者： Xiaohui Xiong Rilong Cong Xiaobai Li Yutang Geng Mingzan Tang Shujun Zhou Yanling Na Chongxu Jiang Key Laboratory of Traffic Safety on Track of Ministry of Education Central South UniversityChangsha 410075HunanChina Joint International Research Laboratory of Key Technology for Rail Traffic Safety Central South UniversityChangsha 410075HunanChina National&Local Joint Engineering Research Centre of Safety Technology for Rail Vehicle Central South UniversityChangsha 410075HunanChina Northeast Normal University Dongan Experimental School Changchun 130000JilinChina Urban rail transit branch China Railway Design CorporationTianjin 300000China National Engineering Laboratory for Digital Construction and Evaluation Technology of Urban Rail Transit China Railway Design CorporationTianjin 300000China.

The cave is of great importance for the storage of equipment and to avoid having workers in the tunnel,but it changes the tunnel section,leads to a change of slipstream and affects the safety of trains and *** Re-normalization group(RNG)k-εturbulence method is used to investigate the slipstream induced by a single train passing through a double-track tunnel at 350 km/*** slipstream in a tunnel with and without a cave is *** slipstream components in three directions are reported *** results show that the existence of a cave changes the slipstream at the tail of the *** measurement points before and after the train passes the cave,the intensity of the slipstream at the tail ismitigated;as the train passes the cave,the tail slipstream is enhanced to a certain *** increasing lateral distance,the peak value of the slipstream with a cave decreases faster than that without a *** findings suggest that the presence of a cave mitigates the slipstream intensity,but special attention should be paid to the design of ancillary facilities,especially their relative location.

关键词： High-speed train railway tunnel cave slipstream

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Cryptanalysis of two strongly unforgeable identity-based signatures in the standard model

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International Journal of Network Security 2018年第6期20卷 1194-1199页

作者： Yang, Wenjie Chen, Min-Rong Zeng, Guo-Qiang College of Cyber Security College of Information Science and Technology Jinan University China School of Computer South China Normal University Guangzhou510631 China National-Local Joint Engineering Laboratory of Digitalize Electrical Design Technology Wenzhou University China

The strong unforgeability of digital signature means that no attacker can forge a valid signature on a message, even given some previous signatures on the message, which has been widely accepted as a common security requirement. Recently, Tsai et al. and Hung et al. presented an efficient identity-based signature scheme and a revocable identity- based signature scheme, respectively. Meanwhile, they all claimed that their scheme is strongly unforgeable against chosen message attacks. In this paper, we point out that the two schemes cannot meet the requirements of strong unforgeability by giving some concrete attacks and brie y analyze the reasons why the provably-secure schemes are insecure following their security model. © 2018 International Journal of Network Security.

关键词： Authentication

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Creep Prediction Model of Concrete-Filled Steel Tube under Different Core Concrete Conditions 3

Creep Prediction Model of Concrete-Filled Steel Tube under D...

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2021 3rd International Conference on Advanced Materials and Ecological Environment, AMEE 2021

作者： Xiong, Zeyu Zhang, Rongling Ma, Lina Hao, Zhaofeng Lv, Wenda Li, Wenbo School of Civil Engineering Lanzhou Jiaotong University Lanzhou China National and Local Joint Engineering Laboratory Road and Bridge Engineering Disaster Prevention Technology Lanzhou Jiaotong University Lanzhou China Lanzhou Railway Design Institute Co. Ltd. Lanzhou China

To reasonably predict the creep law of concrete-filled steel tubular (CFST) members under different working conditions, four groups of creep tests were carried out, and the creep curves of CFST specimens with defects were obtained. Based on the creep prediction formula given in the code for the design of CFST highway arch bridges issued in 2015, the creep prediction models of CFST under different core concrete conditions are studied. The results show that the concrete microcracks around the cavity defects are continuously generated and expanded during the compression process, resulting in the dislocation and sliding of the concrete. It increases the additional deformation of CFST;debonding defects hinder the redistribution of stress between the steel tube and the core concrete, weaken the interaction effect between the steel tube and the concrete, and increase the creep deformation of the core concrete. According to Different core concrete states, appropriate reference factors are selected to modify the creep prediction formula of CFST, which greatly improves the creep prediction accuracy of CFST members and defective members. © Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence.

关键词： Creep

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