A5075640261- Microwave Engineering and Waveguides
- Antenna Design and Analysis
- Magnetic confinement fusion research
- Radio Frequency Integrated Circuit Design
- Particle accelerators and beam dynamics
- Energy Harvesting in Wireless Networks
- Plasma Diagnostics and Applications
- Infrastructure Maintenance and Monitoring
- Advanced Antenna and Metasurface Technologies
- Advanced Power Amplifier Design
- RFID technology advancements
- Wireless Power Transfer Systems
- Superconducting Materials and Applications
- Heat Transfer and Boiling Studies
- Advanced MEMS and NEMS Technologies
- Structural Health Monitoring Techniques
- Concrete Corrosion and Durability
- Fusion materials and technologies
- Full-Duplex Wireless Communications
- Heat Transfer and Optimization
- Analog and Mixed-Signal Circuit Design
- Fault Detection and Control Systems
- Advanced Fiber Optic Sensors
- Magnetic properties of thin films
- Indoor and Outdoor Localization Technologies
Shenzhen University
2021-2025
Hwa Chong Institution
2024-2025
Dalian University of Technology
2024
Shanghai Jiao Tong University
2022
Institute of Plasma Physics
1999-2020
Chinese Academy of Sciences
2002-2020
Polytechnique Montréal
2015-2019
Université de Montréal
2019
École Normale Supérieure - PSL
2014
Ningbo University
2011-2012
Since the very beginning of RF and microwave integrated techniques energy harvesting, Schottky diodes are most often used in mixing rectifying circuits. However, specific μW power-harvesting applications, diode technique fails to provide a satisfactory RF-dc conversion efficiency mainly because its high zero-bias junction resistance. This paper examines state-of-the-art low-power microwave-to-dc techniques. A comprehensive picture on this aspect is given graphically, which compares different...
The introduction of data-driven inertial navigation provides new opportunities that the pedestrian dead reckoning could not well provide for constraining system error drift on smartphones, and has been considered as another promising approach to meet requirement location-based services. However, indoor localization systems based a single technology still have their limitations, such received signal strength fluctuation Bluetooth, making them unable reliable positioning. To exploit...
In this letter, a compact dual-band rectenna is modeled and developed for low radio frequency (RF) power harvesting. The proposed theoretical model can provide comprehensive analysis of the rectenna, including conversion efficiency (PCE) diode, matching rectifier, total PCE rectenna. design, very omnidirectional dielectric resonator antenna (DRA) with broad bandwidth exceeding 40%. Meanwhile, rectifier designed based on single branch in low-power range bandwidths covering two...
Ion cyclotron range of frequency (ICRF) heating on the large helical device (LHD) is characterized by high power (up to 12 MW) and steady state operation (30 min). The LHD a (with major radius 3.9 m minor 0.6 m) with superconducting coil windings (l=2, m=10). main purpose physical research investigate currentless disruption-free plasma. Research development for ICRF has been carried out in recent years: A rf transmission system consisting stub tuners, ceramic feedthrough, an ion loop antenna...
Benefiting from advantageous features of fast tuning, small size, and easy integration, the electronic impedance synthesizer (EIS) has been developed for on-wafer load-pull characterization systems, tunable matching networks, reconfigurable devices so on. The previous designs EIS were mostly based on empirical data instead a closed-form design. Moreover, incomplete figures merit (FOM) chosen to optimize evaluate EIS. In this paper, we propose present, first all, semiclosed-form design...
In this paper, a simplified model with lower order is first developed for nuclear steam generator system and verified against realistic environments. Based on model, hybrid multi-input multi-out (MIMO) control system, consisting of feedforward (FFC) feedback (PEC), designed wide range conditions by using the genetic algorithm (GA) technique. The FFC control, obtained GA optimization method, injects an priori command input into to achieve optimal performance while GA-based FBC provides...
Steady-state plasma heating was successfully performed and sustained for more than 30 min in the LHD. By using ICRF additional EC NBI heating, a total input energy of 1.3 GJ achieved. The average power 680 kW duration 31 45 sec. hardware divertor plates much improved position antenna optimized. heat load to effectively dispersed by magnetic axis swing technique, which caused large changes distribution along leg traces.
In the absence of any external applied magnetic field, we have found that a tunnel junction (MTJ) can produce significant output direct voltage under microwave radiation at frequencies, which are far from ferromagnetic resonance condition, and this signal be increase by least an order magnitude applying current bias. The enhancement detection explained nonlinear resistance/conductance MTJs. Our estimation suggests optimized MTJs should achieve sensitivities for non-resonant broadband about...
In this communication, a broadband and low-profile pattern-reconfigurable dielectric resonator antenna (DRA) with four different radiation patterns is proposed. By exciting two feeding ports phases, of conical pattern, broadside tilted can be obtained. The excited high gains help to achieve wide spatial coverage. For demonstration, the proposed DRA was designed at 3.5 GHz frequency band for potential 5G applications. prototype fabricated measured verification. A broad bandwidth 15%...
Machine learning models have recently demonstrated the ability to mine structural health monitoring data. While existing machine can provide better performance than previous univariate time-series model, it is still an open challenge of fully mining spatial and temporal characteristics response increase their accuracy. In addition, heterogeneous correlation always missed in traditional models. This article proposes a prediction (HSRP) framework based on deep model improve performance. The...
Ion cyclotron heating has been established as one of the schemes in nuclear fusion research and its use steady state plasma various devices is being considered. The optimal technology for ion range frequency not firmly established. This article reports on liquid stub tuner which was newly developed development activities large helical device. It demonstrated high performance real experiments. Two different impedance-matching systems based are studied: a triple system other single with phase...
We present data characterizing the optical properties of feedhorn‐coupled TES polarimeters useful for future CMB measurements. In this detector architecture, bolometers are coupled to radiation through superconducting microstrip a planar ortho‐mode transducer inserted into waveguide. Filters in define pass bands detectors. will measurements co‐polar efficiency, cross‐polar isolation and bandpass compare these results expectations from simulations.
High temperatures, toxic gases, and smoke resulting from indoor fires pose evident threats to the lives of both trapped individuals firefighters. This study aims predict fire development effectively, facilitating rapid rescue decisions minimizing casualties property damage. A comprehensive database has been developed using Computational Fluid Dynamics (CFD) tools, primarily focused on basic scenarios. total 300 scenarios have simulated for different locations severity levels. Using databases...
An electronic impedance tuner using the negative resistance of tunneling diodes is proposed in this paper. Aside from fact that it an interesting solution to synthesize with reflection coefficient larger than one, scheme proven be simpler and consume less power state-of-the-art techniques. The overall circuit topology consists two parts, namely, tuning including a hybrid block PIN diode for generating set points, wideband nonlinear transmission line-based 360° phase shifter rotating points...
With advantages of small size, light weight, and fast tuning capability, electronic impedance synthesizer (EIS) presents game-changing opportunities for industry. However, their widely acceptance is still restrained by the understanding power-handling capacity linearity issues. This work addresses both issues through development a voltage distribution theory which enables simulating at position every PIN diode in distributed EIS. It provides way predicting nonlinearity EIS from its linear...
This paper presented a deformed microstrip combline UHF (Ultra High Frequency) bandpass filter structure with continuous tunability for both center frequency and bandwidth. By using bandwidth control subnetwork, couplings between resonators can be controlled, so as to achieve the of The electrical length resonator approximately equals eg/8, it not only decreases size filter, but also has second passband centered at somewhat over four times from first passband. 66% tuning range 400 MHz 800...
An experimental study was conducted to investigate the effects of stirrup corrosion, concrete strength and casting position on behaviour bond between steel bars concrete. Accelerated corrosion applied corrode stirrups in specimens under laboratory conditions. In total, 180 were cast tested this experiment. The had three nominal strengths C20, C40 C50 with two deformed 18 mm diameter set a 200 × diagonal prism 8 provide confinement. different pouring positions, namely upper lower ends. Five...