Article
Physics, Applied
Meng Zhao, Yongdan Zhu, Yuan Zhang, Teng Zhang
Summary: Co3O4 thin films grown on NSTO substrate exhibit stable bipolar resistive switching and photoresponse characteristics, with reversible magnetization changes attributed to oxygen vacancy redistribution. These results offer promising prospects for multifunctional memory devices with RS, photoresponse, and magnetism.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Yong Zhang, Ming Liu, Chunrui Ma, Lu Lu, Chuan Yu Han
Summary: The concentration and distribution of oxygen vacancies play a crucial role in the performance of oxide materials. This study presents a strategy to control oxygen vacancy doping and discovers the phenomenon of bipolar resistive switching. By utilizing electrochemical migration and oxygen ion redistribution, the control of oxygen vacancies is achieved.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Physical
Hang Yu Zheng, Yu Bai, Yan Shao, Hai Yi Yu, Bing Chen, Jun Liang Lin, Fan Zhang, Chao Wang, Zhan Jie Wang
Summary: The ferroelectric properties and resistive switching behaviors of PZT/LSMO/NSTO heterostructures with different LSMO thicknesses were investigated. It was found that the ferroelectric properties were almost unaffected by the LSMO thickness, while the resistive switching behaviors were closely related to the LSMO thickness, with the maximum switching ratio occurring in the structure with LSMO thickness of 18 nm. Analysis of the energy band structures and I-V curves revealed that the resistive switching behaviors depended on the competition between the tunability of the depletion layer width and the ability of ferroelectric field effect.
APPLIED SURFACE SCIENCE
(2022)
Article
Physics, Applied
Yongdan Zhu, Meng Zhao, Yuan Zhang, Teng Zhang, Hai Zhou
Summary: This letter introduces a BaTiO3/Nb:SrTiO3 heterostructure that exhibits both resistive switching and photovoltaic response characteristics. The resistive switching can be modulated by light illumination, which is attributed to the migration of photogenerated carriers and charge trapping/detrapping. This research helps to understand the multifunctional properties of the heterostructure and provides new possibilities for its practical applications in memory and optoelectronic devices.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Multidisciplinary
Hongfei Xie, Yuhan Chang, Xi Guo, Jianrong Zhang, Baoshan Cui, Yalu Zuo, Li Xi
Summary: We demonstrate the strong orbital torques in light metal Cr through a conversion process from orbital current to spin current by introducing the Pt interfacial layer. The efficiency of the orbital torque in switching the magnetization from light metal Cr layers is proven, with the largest effective orbital torque efficiency around 2.6 Oe/(MA·cm(-2)).
Article
Chemistry, Physical
Hongyan Qi, Weixin Wu, Xinqi Chen, Hee Chul Lee
Summary: In this study, BiFeO3/La0.7Sr0.3MnO3 heterostructures were successfully synthesized and stable bipolar resistive switching characteristics regulated by ferroelectric polarization reversal were observed. The conduction mechanism followed the Schottky emission model, and the memristive behavior was explained by the modulation effect on the depletion region width and Schottky barrier height caused by ferroelectric polarization reversal.
Article
Materials Science, Multidisciplinary
Yanfeng Yin, Chaoyang Kang, Caihong Jia, Weifeng Zhang
Summary: Coexistence of nonvolatile unipolar and volatile threshold resistive switching is observed in Pt/LaMnO3(LMO)/Pt structures. Nonvolatile switching is achieved with negative bias, while volatile switching is obtained with positive bias. Voltage polarity can control the type of resistance switching, which is significant for in-memory computing technology applications.
CURRENT APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Pankaj Solanki, Mayur Vala, Dhananjay Dhruv, Sandip V. Bhatt, Bharat Kataria
Summary: This study describes the synthesis and electrical transport properties of GdMnO3/Al-doped ZnO and GdMnO3/ZnO heterostructures grown by vacuum deposition. The structures of the samples are confirmed by XRD and the surface topography is analyzed using AFM. The electrical properties and resistive switching behavior are investigated through Hall measurements and current-voltage characteristics. Raman spectroscopy is used to study the vibrational modes of the MnO6 octahedra. The results provide insight into the conduction mechanisms and resistive switching behavior of these heterostructures.
SURFACES AND INTERFACES
(2022)
Review
Chemistry, Multidisciplinary
Xianyue Zhao, Stephan Menzel, Ilia Polian, Heidemarie Schmidt, Nan Du
Summary: This review comprehensively examines the state-of-the-art research on resistive switching (RS) in BiFeO3 (BFO)-based memristive devices. It discusses the fabrication techniques for preparing functional BFO layers, analyzes the lattice systems and crystal types responsible for RS behaviors, and reviews the underlying physical mechanisms and effects influencing RS in BFO-based memristive devices. Furthermore, the review explores the applications of BFO devices, evaluates energy consumption in RS, and discusses potential optimization techniques for memristive devices.
Article
Multidisciplinary Sciences
Sunwoo Lee, Jaeyoung Jeon, Kitae Eom, Chaehwa Jeong, Yongsoo Yang, Ji-Yong Park, Chang-Beom Eom, Hyungwoo Lee
Summary: In this study, a resistive switching device based on Pt/LaAlO3/SrTiO3 (Pt/LAO/STO) heterostructures is demonstrated, suitable for multi-level memristive applications. By redistributing surface oxygen vacancies, multiple and tunable conductance states (over 27) are achieved in a non-volatile manner. Additionally, the proposed variance-aware weight quantization (VAQ) method effectively reduces state overlap issues and improves computing accuracy.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Applied
Jialu Li, Wei Guo, Yadong Qiao, Li Yao, Zhiquan He, Fadi Wang, Yuhang Wang, Fengping Wang
Summary: This study investigates the influence of the interface contact condition on the resistive switching effects of metal/Nb:SrTiO3 heterojunctions. It is observed that in situ substrate cleaning treatment significantly weakens the resistive switching effect. SEM images show intimate contact between the metal and the in situ cleaned substrate, while poor contact is observed in the untreated interface. Our research provides an innovative approach to elucidate the mechanism of the resistive switching effect.
APPLIED PHYSICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Yong Zhang, Shunhua Gao, Guiming Cao, Chunrui Ma, Hu Nan, Ming Liu
Summary: This study investigates the influence of oxygen vacancy profiles on the resistive switching (RS) behaviors in perovskite oxide-based memristors. It is found that improving the oxygen vacancies concentration in the LaNiO3 (LNO) film can enhance the resistance on/off ratio of high and low resistance states, with different conducting mechanisms involved. Increasing the oxygen vacancies at the LNO/Nb:SrTiO3 (NSTO) interface enables trap-assisted tunneling, thus improving the device performance. This work provides physical insights into strategies for enhancing the performance of Schottky junction-based memristors.
Article
Physics, Multidisciplinary
Ying Yang, Yuelin Zhang, Liang Yang, Jingdi Lu, Gongxun Deng, Yinshu Wang, Hui Zhu, Aiji Wang
Summary: This study demonstrates the three-state resistive switching (RS) phenomenon on a Pt/BiFeO3/SrRuO3 structure. The three-state storage capability is attributed to the movement of oxygen vacancies and the trapping/detrapping of charge carriers at the interface. Additionally, a ternary OR logic gate is designed using only one memristor.
Article
Materials Science, Ceramics
Yibo Deng, Xiaoguang Xu, Zedong Xu, Mengxi Wang, Qi Liu, Yingli Ma, Jikun Chen, Kangkang Meng, Yong Wu, Jun Miao, Yong Jiang
Summary: In this work, the resistive switching behavior of an amorphous La2Ti2O7 film sandwiched between two Pt electrodes is reported. The resistive switching is forming-free and highly uniform. The mechanism of switching behavior is attributed to trapping/detrapping-mediated electronic bipolar resistance switching.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Birui Wu, Menghao Jin, Ziji Shao, Haodong Fan, Jiahong Wen, Hai Li, Changqiu Yu, Bo Liu, Tiejun Zhou
Summary: This study investigates current-induced magnetization switching and dampinglike field in Pt/Co/PtMn trilayer films with a wedged ultrathin antiferromagnetic (AFM) PtMn layer. By breaking the symmetry with the effective shape anisotropy in the wedged AFM PtMn layer, field-free SOT switching is observed. The study finds that the dampinglike field is boosted by up to 30% through wedging the AFM PtMn layer, and the canting of spins caused by the wedge shape accounts for the observed field-free switching and enhancement of SOT efficiency.
Article
Computer Science, Artificial Intelligence
Zhaohui Dan, Bo Wang, Qian Zhang, Zhou Wu, Huijin Fan, Lei Liu, Muxia Sun
Summary: This paper proposes a novel day-ahead hourly building load forecasting approach using the patch learning framework, which combines a global model and patch models to reduce forecasting errors. The performance of the proposed model is evaluated on practical building load datasets and compared with four advanced building load forecasting models on common metrics.
NEURAL COMPUTING & APPLICATIONS
(2022)
Article
Materials Science, Ceramics
Lei Liu, Zijian Zhou, Xiangkun Elvis Cao, Yue Zhou, Dejun Peng, Ying Liu, Xiaowei Liu, Minghou Xu
Summary: Many dopants have been explored to improve the heat storage performance and sintering resistance of Co3O4, but the performance of these materials is not comparable due to different synthesis methods and test conditions. This study systematically compared and screened nine dopants, including four unreported ones, under the same conditions. The results showed that Cu and Zr doping had the highest re-oxidation rate, while Si and Mg doping had adverse effects on the conversion rate. Cu-doped sample exhibited higher re-oxidation rate and energy density, while Zr-doped sample exhibited more stable cyclability.
CERAMICS INTERNATIONAL
(2023)
Article
Automation & Control Systems
Lei Liu, Yongxiong Liu, Lilin Zhou, Bo Wang, Zhongtao Cheng, Huijin Fan
Summary: In this paper, the application of active disturbance rejection control (ADRC) based on a neural network for the attitude control of a hypersonic vehicle (HV) with uncertain disturbances is investigated. The strong coupling of the HV poses challenges for separate ADRC design for each channel. A cascade active-rejection control scheme is proposed to mitigate this issue, using a Radial Basis Function (RBF) Neural Network instead of the Extended State Observer (ESO) in ADRC. The proposed NNESO-based cascade ADRC demonstrates effective disturbance resistance for HV control.
JOURNAL OF THE FRANKLIN INSTITUTE-ENGINEERING AND APPLIED MATHEMATICS
(2023)
Article
Biochemistry & Molecular Biology
Meiya Li, Linyan Wang, Shiqing Li, Chenglong Hua, Hang Gao, Dandan Ning, Changyu Li, Chunchun Zhang, Fusheng Jiang
Summary: This study revealed the composition of Plagiomnium acutum essential oil (PEO) and confirmed its inhibitory effects on cancer cells. The PEO showed potential antitumor activity by regulating protein expression and interfering with mitochondrial membrane potential. One of the major active components was identified as dolabella-3,7-dien-18-ol.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Automation & Control Systems
Xiao Han, Lei Liu, Huijin Fan, Zhongtao Cheng
Summary: This paper investigates the robust approximate optimal control problem for air-breathing hypersonic vehicle (AHV) and proposed a robust approximate optimal controller based on adaptive dynamic programming (ADP). By input-output linearization and introducing auxiliary variables, the high-order nonlinear AHV dynamics are transformed to a second-order feedback decoupling model. The proposed controller considers both robustness and input cost, optimizes control actions, and avoids chattering. The use of a single critic network design ensures system stability and simplifies implementation. Simulation results demonstrate the effectiveness of the proposed scheme.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2023)
Article
Automation & Control Systems
Hui Hu, Bo Wang, Lei Liu, Zhongtao Cheng
Summary: In this paper, a new adaptive time-varying barrier Lyapunov function (A-TBLF) is proposed for spacecrafts with adaptive time-varying state constraints. The A-TBLF method adapts the barrier in real-time to ensure convergence of the constrained state into a predefined domain. It also includes a barrier update restart scheme to prevent barrier violations. Additionally, a nonlinear margin function is introduced to avoid input saturation and a finite-time estimation adaptive observer chain is proposed for accurate control input design.
INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL
(2023)
Article
Automation & Control Systems
Xinpeng Fang, Huijin Fan, Wei Wang, Lei Liu, Bo Wang, Zhongtao Cheng
Summary: In this article, an adaptive finite-time fault-tolerant control (FTC) strategy is proposed for state tracking of uncertain systems subject to actuator faults and input saturation. The proposed control scheme effectively deals with the coupling of unknown model uncertainties and actuator faults using an adaptive mechanism based on a wisely chosen Lyapunov function. Simulation and comparison results in a flight control system show the effectiveness and advantages of the proposed control scheme.
IEEE TRANSACTIONS ON SYSTEMS MAN CYBERNETICS-SYSTEMS
(2023)
Article
Materials Science, Biomaterials
Qi Hu, Lanlan Jia, Peishan Li, Tingting Zhang, Quzha Silang, Xiaoyu Xie, Sicen Wang
Summary: Efficient integration of cell membrane-nanomaterial hybrids (CN hybrids) is crucial in bioanalysis. However, the poor dispersity of nanomaterials hinders its development. A method was proposed to improve integration efficiency by establishing a dynamic dispersion system to enhance the interaction between cell membranes and nanomaterials. The addition of dextran as a macromolecular stabilizer improved the dispersity of the nanomaterials and avoided resistance to membrane coating. The design principle provided a new perspective for optimizing the behavior of CN hybrids and enhancing their effectiveness in bioanalytical applications.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Article
Automation & Control Systems
Huijin Fan, Xinpeng Fang, Wei Wang, Jiangshuai Huang, Lei Liu
Summary: This paper studies the fault-tolerant control problem for a class of nonlinear systems with uncertain parameters and unknown actuator failures. An adaptive fault-tolerant control scheme based on event-triggered strategy is proposed, and a set of event-triggering conditions are designed for both the controller and the parameter estimators. It has been proven that the closed-loop signals are globally uniformly bounded and the system output converges to a compact set. A modified fault-tolerant control scheme is also designed for the case with a finite number of failures, ensuring the asymptotic convergence of system states. The effectiveness of the proposed schemes is illustrated through a robot manipulator example.
Article
Automation & Control Systems
Wenzhe Fu, Lei Liu, Bo Wang, Zhongtao Cheng, Yongji Wang
Summary: This paper proposes a model predictive static programming (MPSP) based solution to the challenging problem of ascent energy management for hypersonic vehicles using solid rocket boosters. A Bezier spline guidance method is introduced to generate high-quality reference trajectories and improve the performance of MPSP. An online parameter estimation based on the extended Kalman filter is employed to address parametric uncertainties. Numerical simulations demonstrate the effectiveness and robustness of the proposed algorithm in guiding hypersonic vehicles to a given terminal state under uncertainties and outperforming existing methods.
INTERNATIONAL JOURNAL OF ADAPTIVE CONTROL AND SIGNAL PROCESSING
(2023)
Article
Engineering, Aerospace
Gaoxiang Peng, Bo Wang, Lei Liu, Huijin Fan, Zhongtao Cheng
Summary: In this article, a real-time entry trajectory generation algorithm with modular policy is proposed to achieve adaptability to various missions. Deep reinforcement learning is utilized to train two modules, providing a reliable trajectory and solving state misalignment and contradiction.
AEROSPACE SCIENCE AND TECHNOLOGY
(2023)
Article
Automation & Control Systems
Xinpeng Fang, Huijin Fan, Lei Liu, Bo Wang
Summary: The paper focuses on a class of interconnected nonlinear systems with unknown sensor faults and uncertain interactions. A decentralized adaptive fault-tolerant control (FTC) scheme is proposed to compensate for the effects of faults in the control loop. The effectiveness of the proposed scheme is demonstrated through simulation and comparison studies.
JOURNAL OF CONTROL AND DECISION
(2023)
Article
Chemistry, Multidisciplinary
Changdong Shao, Tianyi Xu, Chen Chen, Qionglin Yang, Chao Tang, Ping Chen, Mingzhu Lu, Zhengsong Hu, Huayou Hu, Tingting Zhang
Summary: A simple and effective method for copper-catalyzed selective C5-H bromination and difluoromethylation of 8-aminoquinoline amides using ethyl bromodifluoroacetate as the bifunctional reagent was developed. The combination of cupric catalyst and alkaline additive enables C5-bromination, while the combination of cuprous catalyst and silver additive enables C5-difluoromethylation. This method exhibits a wide substrate scope and provides easy access to desired C5-functionalized quinolones with high yields.
Article
Engineering, Aerospace
Z. Y. Yin, B. Wang, R. T. Xiong, Z. Xiang, L. Liu, H. J. Fan, C. L. Xue
Summary: This paper investigates the constrained attitude control problem of hypersonic vehicles and proposes an improved prescribed performance dynamic surface control method. An adaptive scaling strategy is introduced to avoid state violation, and a nonlinear disturbance observer is used to compensate system disturbances. Numerical simulations demonstrate the effectiveness and superiority of the proposed method.
AERONAUTICAL JOURNAL
(2023)
Proceedings Paper
Geosciences, Multidisciplinary
Tingting Zhang, Yun Shao, Zhengshan Ju, Zhiqu Liu
Summary: This paper introduces the Laboratory of Target Microwave Properties (LAMP) and demonstrates a full-parameters microwave properties measurement experiment for soil salinized process. In this experiment, the microwave characteristic of three targets of soil in different soil salinized stages were measured in a non-interference environment. The changes of soil salt content and distribution can be reflected in radar images. More experiments should be carried out in the future to acquire and analyze the weak signal.
2022 IEEE INTERNATIONAL GEOSCIENCE AND REMOTE SENSING SYMPOSIUM (IGARSS 2022)
(2022)
