A5091913701- Advanced Sensor and Control Systems
- Atmospheric chemistry and aerosols
- Cognitive Radio Networks and Spectrum Sensing
- Power Systems and Renewable Energy
- Microgrid Control and Optimization
- Air Quality and Health Impacts
- Advanced Algorithms and Applications
- Advanced MIMO Systems Optimization
- Hydraulic and Pneumatic Systems
- Smart Grid and Power Systems
- Power System Reliability and Maintenance
- Machine Fault Diagnosis Techniques
- Cooperative Communication and Network Coding
- Power Systems and Technologies
- Embedded Systems and FPGA Design
- Wireless Communication Networks Research
- Atmospheric Ozone and Climate
- Industrial Technology and Control Systems
- Advanced Computational Techniques and Applications
- Vibration and Dynamic Analysis
- Distributed Control Multi-Agent Systems
- Islanding Detection in Power Systems
- Vehicle emissions and performance
- Atmospheric aerosols and clouds
- High-Voltage Power Transmission Systems
Qilu University of Technology
2023
South China Normal University
2023
Shandong University
2010-2022
Shanghai Jiao Tong University
2021
Nanjing Institute of Industry Technology
2019-2021
Shandong Jiaotong University
2021
China Institute of Water Resources and Hydropower Research
2019
Northwest A&F University
2019
Sichuan University of Science and Engineering
2010-2016
Karamay Central Hospital
2016
Abstract. This paper presents the first results of measurements trace gases and aerosols at three surface sites in outside Beijing before during 2008 Olympics. The official air pollution index near Olympic Stadium data from our nearby site revealed an obvious association between quality meteorology different responses secondary primary pollutants to control measures. Ambient concentrations vehicle-related nitrogen oxides (NOx) volatile organic compounds (VOCs) urban dropped by 25% 20–45% two...
Abstract. Heterogeneous processes on dust particles are important for understanding the chemistry and radiative balance of atmosphere. This paper investigates an intense Asian storm episode observed at Mount Heng (1269 m a.s.l.) in southern China 24–26 April 2009. A set aerosol trace gas data collected during study was analyzed to investigate their chemical evolution heterogeneous photochemistry as traveled China. Results show that mineral arriving Mt. experienced significant modifications...
Aiming at the problems of transient over-current and over-voltage in switching process AC/DC hybrid microgrid grid-connected mode island mode, which leads to sudden change transmission power seriously affects quality. In this paper, an improved seamless control strategy droop with disturbance observer is designed. The main work as follow: according diffident calculation methods adaptive realized by detecting current frequency Point Common Coupling(PCC) public grid. Secondly, from will cause...
Abstract This study focuses on the fault diagnosis of a hydroelectric generation system with hydraulic‐mechanical‐electric structures. To achieve this analysis, methodology combining Bayesian network approach and expert is presented, which enables time‐based maintenance to transform condition‐based maintenance. First, types associated characteristics are extensively analyzed establish precise network. Then, Noisy‐Or modeling used implement system, not only reduces node computations without...
Wind turbine fault diagnosis and early warning are important to reduce wind farm operation maintenance costs improve power generation efficiency. In this paper, we take the Supervisory Control Data Acquisition (SCADA) data as research object health purification, model building, unit status monitoring from a completely data-driven perspective. Firstly, for problem that Density-Based Spatial Clustering of Applications with Noise (DBSCAN) algorithm cannot identify high-density anomalous data....
Abstract. This paper presents the first results of atmospheric measurements trace gases and aerosols at three surface sites in around Beijing before during 2008 Olympics. We focus on secondary pollutants including ozone, fine sulfate nitrate, contribution regional sources summer 2008. The reveal different responses to control measures from primary pollutants. Ambient concentrations vehicle-related nitrogen oxides (NOx) volatile organic compounds (VOCs) an urban site dropped by 25% 20–45% two...
AbstractAbstract—A new fault phase selection method for transmission lines is proposed in this article. First, factors are constructed based on the relationship between current of each and difference other two phases at a relay point. By analyzing different characteristics case types, criteria proposed. Simulation results show that fast accurate can be achieved within period cycle after occurs. Also, it verified bears high sensitivity to all types faults immune impact resistance, inception...
Power grid reliability impacts could be significant when a large amount of variable wind generation is integrated with the electric power system. The Sequential Monte Carlo Method are required in system impact assessment order to consider output generating units intermittent and volatility. application optimal flow leads operation method farms cannot meet demand, or other fault aiming at least load shedding. In probabilistic production simulation time varying characteristic farm retained,...
인지무선통신(Cognitive radio, CR)은 사용하지 않는 대역을 동적으로 활용할 수 있는 통신 방식이다. 여기서 CR 사용자는 주사용자와 동일한 스펙트럼을 공유하면서 주사용자에 대한 간섭을 최대한 배제해야한다. 일반적으로 각 자신이 속한 지역을 센싱하는 것으로 스펙트럼 사용 가능 여부를 판단한다. 하지만 사용자가 다중 경로 페이딩이나 섀도잉와 같은 불확실한 무선 환경에 있을 경우 신호를 정확하게 감지하지 못할 확률이 높아진다. 이때 협력 센싱 기법을 이러한 무선환경을 극복할 있게 된다. 본 연구에서는 판정을 위해 연판정 때 주어진 시스템 요구치를 만족하면서 detection 확률을 향상시킬 노드 선택 알고리즘을 제안하였다. SNR이 상대적으로 높은 노드에 가중치를 주는 maximum ratio combining(MRC) 방식으로 최적의 노드를 찾았다. 실험 결과, 제안한 알고리즘으로 요구치에 부합하는 선택할 있었다. Cognitive radio has been...
Spectrum occupancy modeling plays an important role in improving the performance of Cognitive Radio (CR) systems, because most methods to improve Dynamic Access (DSA) need make assumptions about channel periods' distribution. However, Secondary Users (SUs) cannot directly observe accurate distribution due sensing errors caused by noise, which will lead inaccurate analysis transmission efficiency or throughput. In this paper, we analyze influence different types on observed periods, and...
In this paper, the different singularity characteristics of differential current transformer protection under inner-zone and out-zone faults are analyzed while is saturated. Then, using grille fractal, a new approach to prevent maloperation proposed. Combining proposed with an adaptive generalized morphological filter, characteristic signal can be fully reserved. Meanwhile, noises interferences restrained. It not necessary for accurately determine moment when fault occurs appears. Using...
The lithium-ion batteries (LIBs) with high nickel cathode have specific energy, but as the content in active material increases, are suffering from temperature limitations, unstable performance, and transition metal dissolution during long cycling. In this work, a functional electrolyte P-phenyl diisothiocyanate (PDITC) additive is developed to stabilize performance of LiNi
In view of the influence large-scale electric vehicle access to distribution network on spatial load prediction, this paper proposes a prediction method for urban considering and temporal charging load. Firstly, vehicles are classified according mode travel characteristics various types vehicles. Secondly, probability function is fitted rules survey statistical data residents. Then, model chain constructed, in different regions times calculated by Monte Carlo method. Finally, based actual...
Primary channel mean period plays an important role in improving the performance of Dynamic Spectrum Access (DSA), because many algorithms to improve Cognitive Radio (CR) need use as a prior knowledge. Secondary Users (SUs) can obtain statistics primary by spectrum sensing. However, SUs' estimation is inaccurate due errors sensing real world, which will lead degradation CR systems. In this paper, we two-state Markov chain model states, and state transition probability analyze influence on...
Because of the complexity and severity marine environment, probability failure offshore wind farms is much higher than that onshore farms. The original control might fail under a single-machine network communication faults turbines. In this study, centralized replaced with distributed control, leader-follower strategy two types fault conditions proposed to reduce adverse effect on system improve tolerance system. First, expanded into turbine cluster model based Hamiltonian energy theory....
Based appear for magnetic navigation system substation inspection robot course accumulation of errors phenomenon, fuzzy PID control algorithm is applied to system, path through the logic correction, achieve stability navigation.On movement patterns modeled using parameters that affect processing, simulation shows -PID higher precision control, better operational stability.
This paper mainly studys the open valve control hydraulic motor loading system.For electro proportional relief system, and quadratic component DS1 are modeled, then mathematical model of system is obtained. The dynamic steady state characteristics stabilized by fuzzy PID technique. Finally modeling Simulating electro-hydraulic SIMULINK.
Abstract. Heterogeneous processes on dust particles are important for understanding the chemistry and radiative balance of atmosphere. This paper investigates an intense Asian storm episode observed at Mount Heng (1250 m a.s.l.) in Southern China 24–26 April 2009. A set aerosol trace gas data collected during study was analyzed to investigate their chemical evolution heterogeneous photochemistry as traveled China. Results show that mineral arriving Mt. experienced significant modifications...
Unbalanced grid is a normal fault in power system, and order to ensure the rectifier current tracking precision under this condition, design implementation of control strategies become more complex. In view this, simplified strategy proposed, which suitable for LCL-based operating both balanced unbalanced conditions. The sinusoidal achieved by converter-side LCL filter. reference only calculated voltage its 1/4 period lagging signal at stationary coordinates. Compared with conventional...