A5084089609- Advanced Control Systems Design
- Advanced Frequency and Time Standards
- Fractional Differential Equations Solutions
- Network Time Synchronization Technologies
- Inertial Sensor and Navigation
- GNSS positioning and interference
- Mobile Agent-Based Network Management
- Radio Wave Propagation Studies
- Chaos control and synchronization
- Advanced DC-DC Converters
- Induction Heating and Inverter Technology
- Energy Efficient Wireless Sensor Networks
- Dysphagia Assessment and Management
- Advanced Control Systems Optimization
- Advanced Measurement and Detection Methods
- Cloud Computing and Resource Management
- Distributed systems and fault tolerance
- Advanced MIMO Systems Optimization
- Sensorless Control of Electric Motors
- Magnetic Bearings and Levitation Dynamics
- Multilevel Inverters and Converters
- Internet of Things and Social Network Interactions
- IoT-based Smart Home Systems
- Electric Motor Design and Analysis
- Advanced Wireless Communication Technologies
Heilongjiang University of Chinese Medicine
2025
Beijing Institute of Technology
2017-2024
Dalian University of Technology
2019-2024
National Clinical Research Center for Digestive Diseases
2023
Beijing Tian Tan Hospital
2023
Capital Medical University
2023
China Mobile (China)
2021-2022
Shanghai Jiao Tong University
2022
University of Electronic Science and Technology of China
2020
Catholic University of Pusan
2004-2018
In this paper, TiO(2)/Ag sponge-like nanostructure composites have been prepared by the surface sol-gel method with template of natural cellulose, which is relatively simple, low-cost, and environmentally friendly. The Ag nanoparticles are deposited on TiO(2) nanosponges through UV irradiation photoreduction silver nitrate solutions. physicochemical properties as-prepared characterized XRD, BET, SEM, TEM, XPS UV-vis DRS techniques. UV-light photocatalytic activities evaluated...
This paper proposes a modeling and analysis method for Caputo–Fabrizio (C-F) definition-based fractional-order Boost converter with inductive loads. The proposed analyzes the system characteristics of circuit three state variables. Firstly, this constructs large signal model by taking advantage space averaging method, providing accurate analytical solutions quiescent operating point ripple parameters Secondly, small C-F linearization, transfer function Finally, conducts circuit-oriented...
Permanent magnet synchronous machines (PMSMs), which include a dynamic combination of electronics and mechanics, have been widely deployed in emerging mechatronics systems. However, there exist undesirable perturbations the electrical mechanical parameters PMSM with different operating conditions, deteriorate control performance pose risks to connected power conversion To improve robustness considering multiple system perturbations, robust strategy parametric adaptation is established this...
The Caputo–Fabrizio (C–F) definition, which solves the singularity problem in Caputo has been preliminarily applied field of circuit system modeling. However, complex characteristics C–F definition-based systems are still understudied. Therefore, this paper proposes a fractional-order RLC (CF-FORLC) model and analyzes its basic characteristics. First, effects different component orders on performance parameters including impedance, quality factor, bandwidth analyzed, gives insights into...
This study employs the Caputo–Fabrizio and Atangana–Baleanu fractional derivatives to determine impedance admittance model of capacitor inductor. The analog implementation circuits are proposed aiming at fractional-order electric elements based on these two derivatives, which can be widely used in a variety electrical systems using new operators. Constant phase inductor approximated by Oustaloup algorithm recursive net-grid-type circuit, respectively. Based that, approximation components...
This paper introduces an implementation of a clock synchronization method for NTP (Network Time Protocol). is widely used and effective application protocol in maintaining time over the network. But performance depends on Operating System (OS) real property OS because working management functions provided by general-purpose OS. But, currently available Oses' properties are restricted. So needs embedded systems increasing. analyzes dependencies shows requirements synchronization. Also...
The microstructural evolution and underlying mechanism of a new high strength, toughness near β titanium alloy, β20C, during hot deformation, heat treatment were studied qualitatively quantitatively. It was found that dynamic recovery occurs mainly in phase, while α phase undergoes both continuous incomplete recrystallization with fraction high-angle grain boundaries (≥15°) 21.1% under hot-rolling. Subsequently, static an increasing (21.1%→60.7%) annealing, the grains are equiaxed refined...
In order to improve the accuracy and stability of conventional position estimation with interior permanent magnet synchronous motors (IPMSMs), this paper develops a super-twisting sliding mode observer (ST-SMO)-based speed-sensorless control strategy, in which voltage source inverter (VSI) nonlinearity is taken into account. The proposed ST-SMO works by estimating stator currents motor obtaining using phase locked loop. Moreover, since mismatch between reference actual voltages caused VSI...
A pseudolite is used as a GPS backup system, and also for the purpose of indoor navigation correction information transmission. It installed on ground, transmits signals that are similar to those satellite. In addition, in recent years, studies improvement positioning accuracy using pseudorange measurement have been performed. As effect time synchronization error between satellite, 1 us generally induces 300 m; achieve meter-level positioning, ns-level satellite required. Therefore,...
This paper presents a novel approach for modeling Boost converters using the Caputo–Fabrizio (C-F) definition-based fractional-order model to address singular characteristics in definitions and enhance accuracy. A small signal method is proposed improve accuracy of circuit parameter design derive state-averaged models, state-space equations, transfer functions. The influence capacitor inductor orders on steady-state analyzed ripple investigated through simulation. When approaches 1, output...
본 논문은 국제원자시(TAI)를 생성하고 세계협정시(UTC)를 결정하기 위해 GPS에서 전달되는 코드를 기반으로 한 시각비교 기법에 대한 연구 결과이다. 시각비교를 위한 국제표준 양식으로 CGGTTS가 사용되고 있는데, CGGTTS 표준은 시각용 GPS 수신기에서만 제공되고 측지용 수신기에서는 RINEX 형식으로 위성의 정보를 제공한다. 수신기를 시각비교용으로 사용하기 ROB에서는 형식의 데이터를 이용해서 변환하는 r2cggtts 프로그램을 제공하고 TAI link에 참여하는 전 세계 연구실들은 해당 통해 코드 신호에 의한 자료를 BIPM에 주기적으로 전송한다. 논문에서는 위성으로부터 수신기까지 신호가 전달될 때 발생하는 오류 요소들과 그 보상 방법을 간단히 소개한다. 오류요소 중 대류층 지연에 대해 자세히 소개하고 기존 프로그램에 적용된 NATO 모델과 현재 가장 널리 있는 Saastamoinen 모델을 비교 분석한다. This paper shows results of...
Modern security architectures provide Trusted Execution Environments (TEEs) to protect critical data and applications against malicious privileged software in so-called enclaves. However, the seamless integration of existing TEEs into cloud is hindered, as they require substantial adaptation executing inside an enclave well management handle enclaved workloads. We tackle these challenges by presenting VirTEE, first TEE architecture that allows strongly isolated execution unmodified virtual...
Many electrical systems can be characterized more authentically by fractional-order dynamic systems. The Atangana–Baleanu and the Caputo–Fabrizio fractional derivatives have solved singularity problem in Caputo derivative. This work uses to model mutual inductance frequency domain. To use circuit design, T-model equivalent circuits are presented with different derivatives. impedance matching networks based on proposed coupling simulated as an application. characteristics of orders analyzed....