A5100642472- HVDC Systems and Fault Protection
- Silicon Carbide Semiconductor Technologies
- Multilevel Inverters and Converters
- Advanced DC-DC Converters
- High-Voltage Power Transmission Systems
- Digital Filter Design and Implementation
- Advanced Adaptive Filtering Techniques
- Traffic control and management
- Cardiac Structural Anomalies and Repair
- Microgrid Control and Optimization
- Analog and Mixed-Signal Circuit Design
- Transportation Planning and Optimization
- Image and Signal Denoising Methods
- Autonomous Vehicle Technology and Safety
- Advanced Data Storage Technologies
- Infrastructure Maintenance and Monitoring
- Wireless Power Transfer Systems
- Vehicle emissions and performance
- Railway Systems and Energy Efficiency
- Transport Systems and Technology
- Asphalt Pavement Performance Evaluation
- Agricultural Innovations and Practices
- Robotic Path Planning Algorithms
- Mass Spectrometry Techniques and Applications
- Traffic and Road Safety
Tianjin Medical University General Hospital
2025
Delft University of Technology
2023-2024
Kunming University of Science and Technology
2024
Beijing Forestry University
2023
Beijing Jiaotong University
2015-2022
Beijing Railway Institute of Mechanical & Electrical Engineering Group (China)
2016
Nanyang Technological University
2002-2003
Deep Reinforcement Learning (DRL) has made remarkable progress in autonomous vehicle decision-making and execution control to improve traffic performance. This paper introduces a DRL-based mechanism for cooperative lane changing mixed (CLCMT) connected automated vehicles (CAVs). The uncertainty of human-driven (HVs) the microscopic interactions between HVs CAVs are explicitly modelled, different leader-follower compositions considered CLCMT, which provides high-fidelity DRL learning...
Encouraging farmers to adopt environmentally friendly technology through the rational use of social learning and agricultural extension is an effective way overcome bottleneck caused by slow diffusion technology. Based on expanding existing objects research farmers' adoption behavior, this paper examines influence behavior from a dynamic perspective. In doing so, it enriches theoretical empirical behavior. Specifically, takes fertigation as example, constructs analysis framework that...
As a crucial element of proteolysis targeting chimeras (PROTACs), the choice E3 ubiquitin ligase significantly influences degradation efficacy and selectivity. However, available arsenal ligases for PROTAC development remains underexplored, severely limiting scope targeted protein degradation. In this study, we identify non-inhibitory aptamer ZYG11B, substrate receptor Cullin 2-RING complex, as an warhead This aptamer-based platform, termed ZATAC, is facilely produced through bioorthogonal...
In view of the DC fault current isolation deficiency for conventional half-bridge sub-module (HBSM) based modular multilevel converter (MMC), this paper presents an improved MMC topology. Both quasi reverse blocking submodules (QRBSMs) and limit modules (CLMs) are employed to improve handling capability HVDC applications. This analyzes such a new configuration operation principles. Then pole-to-pole short circuit is taken into consideration further study, as well mechanism quantitative...
Modular multilevel converter (MMC) is one of the promising voltage source topologies in field high direct current (HVDC) transmission system. Based on analysis existing sub-module topologies, an improved half-bridge topology based reverse blocking IGBTs (RB-HBSM) was proposed for solving fault ride through issues. In this paper, mechanism and electrical stress main power switches are studied firstly detail. Then control flow chart presented. Feasibility protection theory verified by...
Energy storage systems with multilevel converters play an important role in modern electric power large-scale renewable energy integration. This paper proposes a reverse-blocking modular converter for battery system (RB-MMC-BESS). Besides integrating distributed low-voltage batteries to medium or high voltage grids, the inherited advantages of traditional MMCs, RB-MMC-BESS also provides improved DC fault handling capability. analyzes such new configuration and its operating principles....
Huge voltage spikes on auxiliary switches is a common issue for most of the existing zero-current switching (ZCS) pulsewidth-modulated (PWM) converters. The reason spike lies in parasitic resonance between resonant inductance and stray output capacitance Coss switch, which does not have negative impact zero-voltage (ZVS) This paper proposes low-stress ZCS technique to eliminate consequence PWM All power devices, including show low stresses ZCS. cell introduced clamping diode realize...
This paper proposes a super capacitor energy storage-based modular multilevel converter (SCES-MMC) for mine hoist application. Different from the conventional MMCs, sub-modules employ distributed banks, which are designed to absorb regenerative of and released in traction condition, so as improve utilization efficiency. The key control technologies introduced detail, followed by analysis configuration operation principles. feasibility proposed SCES-MMC topology theory also verified....
This paper proposes an enhanced modular multilevel converter based battery energy storage system (EMMC-BESS) for interfacing low voltage batteries to the medium or high grids. Besides distributed integration functionalities and inherited advantages of traditional MMCs, EMMC-BESS also provides DC fault handling capability. Based on analysis operation principles, control algorithms are developed power balancing state charge (SOC). Moreover, typical is taken into consideration further analyzing...
A comparison of various low-pass filter architectures that are commonly used in Sigma-Delta(/spl Sigma/-/spl Delta/) demodulators is presented the paper. In this conventional demodulator such as optimal FIR filter, Sinc/sup k/ and non-linear Zoomer considered. It shown optimum provides most attractive properties among filters. As an alternative to Laguerre IIR architecture then proposed design scheme for via use orthonormal functions. with approach, offers several features. The problem easy...
Conventional sigma-delta (/spl Sigma/-/spl Delta/) decimation methods are not optimal because the downsampling operation following noise-shaping filters enables some quantization noise to alias back into baseband. This paper proposes a novel method that simplifies implementation of process. makes use an Laguerre filter as followed by another acts narrow-band filter. finite-impulse response (FIR) low-pass such FIR and Sinc/sup k/ commonly used in /spl Delta/ demodulators. As alternative,...
Since the traditional half-bridge modular multilevel converter (HB-MMC) is endangered under DC side short-circuit faults. This paper proposes a novel sub-module (SM) topology for MMC with fault limitation capability. The current fully transferred to bypass thyristor by turning off all IGBTs when occurs, then diode freewheeling effect eliminated and thyristors in are arranged as controlled rectifier, so currents can be cleared simply inhibiting gate signals of thyristors. feasibility validity...
As an alternative to conventional FIR filters, optimal IIR filter architecture based on orthonormal Laguerre functions is proposed for Sigma-Delta (/spl Sigma/-/spl Delta/) demodulators. A design methodology presented via the optimization of a quadratic function subject linear and constraint. An efficient procedure perform discussed. The easy implement because it needs only small number components therefore well suited VLSI implementations. impact selection pole stability phase linearity...
A novel direct ac-ac converter based on the switched-capacitor and series resonant principle, featuring with soft switching characteristic bidirectional power flow, is proposed in this paper. The consists of a LC tank, switched-capacitors reverse blocking IGBTs (RB-IGBT), resulting small size light weight; high efficiency achieved by adopting technology. Moreover, designed to apply for 220/110V AC/AC voltage conversion applications. In order demonstrate performance new converter, its...
The dc-link capacitor voltage drift is the key technical problem of converters with multi-intermediate nodes. back-to-back (BTB) configuration balancing control can achieve a certain operation range. Nevertheless, challenge still remains, especially when both sides operate at high but different modulation indexes and power factors. This article focuses on BTB seven-level V-clamp multilevel converter (VMC). balanced limits are presented, effect factor capability analyzed. To maintain under...
Current approaches to identifying driving heterogeneity face challenges in capturing the diversity of characteristics and understanding fundamental patterns from a behaviour mechanism standpoint. This study introduces comprehensive framework for an Action-chain perspective. First, rule-based segmentation technique that considers physical meanings is proposed. Next, Action phase Library including descriptions various created based on findings. The concept then introduced by implementing...
Huge voltage spikes on auxiliary switches is a common issue for most of the existing zero current switching (ZCS) techniques. The are caused by energy oscillations between resonant inductor and stray capacitor switch, since switch can't be employed as capacitor. In this paper, novel low-stress ZCS technique proposed, which makes all in power converter, including have lower stresses than that with traditional introducing an cell. Buck converter taken example. To realize proposed technique,...
Multilevel converters are well suited for high-power and high-quality power conversion. This paper presents a new seven-level V-clamp multilevel converter (VMC) with reduced clamping devices. All phases of the VMC share common DC-link capacitors realize bidirectional conversion without flying capacitors. Each branch sustains only single-level voltage during its commutation process. Hence, series switches can be controlled as simple one switch dynamic unbalancing issue is avoided. In this...
As a bionic optimization algorithm, ant colony algorithm searches for the optimal path by simulating foraging behavior of ants. It has advantages strong global search ability and easy implementation, can be used to solve planning problem patrol robot in campus environment. This paper first constructs MATLAB simulation model environment, then designs method based on algorithm. The effectiveness practicability are verified analysis. results show that effectively plan robot, improve efficiency...
As an alternative to conventional FIR filters, IIR filter architecture based on orthonormal Laguerre functions is proposed for applications in narrow-band filtering. A design methodology presented via a frequency transformation the digital domain. The can then be efficiently designed using min-max criterion modified Parks-McClellan (1972) algorithm. easy implement because it needs only small number of components and therefore well suited VLSI circuits. impact selection pole stability phase...
Featured with the simple structure, V-clamp multilevel converter (VMC) shows good prospect in high-voltage and high-power applications. But VMC is endangered by deviation of dc-link capacitors voltage, especially under high modulation index (MI) power factor (PF) condition. Thus, a voltage balancing strategy for three-phase seven-level proposed this paper. This re-designs carriers reference to achieve reduced switching actions. Besides, an active compensation control presented improve...