A5100641829- Power Systems and Technologies
- Smart Grid and Power Systems
- Terahertz technology and applications
- Metamaterials and Metasurfaces Applications
- Photonic and Optical Devices
- Privacy-Preserving Technologies in Data
- Cryptography and Data Security
- Error Correcting Code Techniques
- Microwave Engineering and Waveguides
- Advanced Wireless Communication Techniques
- Advanced Antenna and Metasurface Technologies
- Distributed Control Multi-Agent Systems
- Antenna Design and Analysis
- Neural Networks Stability and Synchronization
- High-Voltage Power Transmission Systems
- IoT and Edge/Fog Computing
- Integrated Energy Systems Optimization
- Power Systems and Renewable Energy
- Superconducting and THz Device Technology
- Optical Coatings and Gratings
- Advanced Fiber Optic Sensors
- Stochastic Gradient Optimization Techniques
- Plasmonic and Surface Plasmon Research
- Radio Frequency Integrated Circuit Design
- Advanced Data and IoT Technologies
University of Electronic Science and Technology of China
2008-2025
Southwest Jiaotong University
2024
China Railway Fifth Survey and Design Institute Group
2024
China Railway First Survey and Design Institute Group Co. Ltd.
2024
Xidian University
2023
Tianjin University
2023
Dalian University of Technology
2020-2023
Dalian University of Foreign Languages
2021-2023
Dalian University
2022
University of Science and Technology
2020
Terahertz (THz) modulators are always realized by dynamically manipulating the conversion between different resonant modes within a single unit cell of an active metasurface. In this Letter, to achieve real high-speed THz modulation, we present staggered netlike two-dimensional electron gas (2DEG) nanostructure composite metasurface that has two states: collective state with massive surface characteristics and individual meta-atom characteristics. By controlling transport nanoscale 2DEG...
Tunable focusing planar lens possesses more flexible characteristics to facilitate the expansion of its function and application. This study presents a meta-lens based on phase gradient vanadium dioxide composite metasurface controlled by an external thermal stimulus that enables switchable focusing. By utilizing insulator-metal transition components, can show different distribution could lead various focuses. Both simulated experimental results demonstrate without stimulus, components...
A metasurface composed of multiple resonator arrangements with a certain phase distribution is capable efficient wavefront manipulation. An anisotropic matrix consisting asymmetric metal cross particles near-field coupling-induced achieves simultaneous distinctive dualpolarization anomalous reflections. Using polarization splitting, due to the gradients subunit, x-and-y-polarization components incident terahertz waves can be efficiently deflected different deflection angles in single plane...
In next generation communication system, space-air-ground integrated network (SAGIN) would be utilized to provide ubiquitous and unlimited wireless connectivity with large coverage, high throughput, strong resilience. this network, there are multiple heterogeneous options satisfy service requirements, where an efficient selection strategy is required improve resource utilization achieve load balance. paper, we propose a system model of in SAGIN formulate corresponding evolutionary game. A...
This article demonstrates a 10.23–15.7-GHz varactor-tuned microstrip bandpass filter (BPF) with fully controllable center frequency, bandwidth, and transmission zeros. The concept of cascading tunable low-pass unit together high-pass is adopted to achieve the reconfigurable BPF. A comprehensive loss analysis carried out determine preferable circuit topologies for (LPF) (HPF), respectively. not only overcomes limitation low quality factor varactor at high but also contributes highly flexible...
Terahertz communication technology can provide abundant frequency resources, strong confidentiality, antijamming capability, tracking capability and the ability to achieve high-speed data transmissions serve as an important technical method for communications in future. Among these terahertz technologies, direct modulation is a key means low system complexity power consumption. In this paper, review outlook of are proposed from aspects high-electron-mobility-transistor-based modulation,...
This article uses a software architecture model that combines two architectures, based on the traditional Android environment. Through comparative research network technology today, Java has been selected as tool for developing education systems future and maintenance upgrades. The underlying relies APP to enable between teachers students. can not only give play advantages of computers in data transmission, but also embody new teaching with students main body. It solve various practical...
Abstract:
Summary This paper investigates the distributed scaled consensus problem of multiple agents with high‐order dynamics under asynchronous setting, where each agent measures neighbors' information at certain discrete time instants according to its own clock rather than whole process and all agents' clocks are independent other. Assume that communication topology can be arbitrarily switched transfer between has a time‐varying delay. Under designed control protocol, it is shown same scale will...
In this article, a novel 1.05–1.25 GHz filtering antenna feeding network with reconfigurable frequency and polarization is proposed. It simply consists of in-/out-of-phase power divider 90° hybrid coupler. By controlling the varactors in (RFPD) without any switch component, proposed three-port offers continuous responses four switchable output patterns including equal dividing phase difference negative or positive single-ended at either port. With connecting to regular dual-polarized...
Space-air-ground integrated network (SAGIN) can support a wide variety of task scenarios as next-generation network. In this dynamic network, tasks with different characteristics and demands are usually simultaneously generated, which requires an efficient scheduling method to meet diverse demands, reduce system cost, improve resource utilization. paper, we propose scalable allocation solution suitable for various in SAGIN. Specifically, construct generic framework that considers types With...
Multi-motor servo systems are widely used in industrial control. However, the single-core microprocessor architecture based on microcontroller unit (MCU) and digital signal processor (DSP) is not well suited for high-performance multi-motor due to inherent limitations computing performance serial execution of code. The bus-based distributed formed by interconnecting multiple controllers increases system communication complexity, reduces integration, incurs additional hardware software costs....
Signed digraphs have been developed in multiagent systems to explain cooperative and competitive interactions among agents. This article explores the collective behavior for a group of generic linear agents interacting by random interaction manner on signed presence multiple leaders. In setting interactions, information between neighboring may fail at each time step, which is described Bernoulli variable. The global almost sure convergence system solved using analysis method products...
Machine vision has penetrated into every field of our daily life and is being used more widely, especially in the automatic driving recent years, computer ImageNet Dataset will show very strong accuracy robustness. The research objective this paper to analyze network structure YOLO V3 summarize loss function, use GTSDB dataset train test algorithm, get recall rate, average identifying traffic signs, compare results with R-CNN series algorithms. After testing, we find that algorithm faster...
A design method of a THz metasurface with maximum beam-scanning angle in given bandwidth is proposed. The sequence the dual-mode C-shaped resonator designed, fabricated and tested. 40° deflection coefficient 76% 0.3–0.5 band obtained both simulation experiment. Our results provide new degrees freedom for integration into planar augments frequency scanning limited spectrum resources.
Summary This article studies the problem of consensus tracking control for second‐order agents in multiagent systems over switching signed digraphs. Compared with existing works on structurally balanced digraph where antagonistic relations exist only between two independent subgroups, this explores a more general case first time, sense that relation is allowed any agents. On basis design cooperation‐antagonism environment‐based distributed algorithm, suitable model transformation vectors are...
A four-channel 400 GHz channel spacing InP-based arrayed waveguide grating with a flattened wavelength response by employing multimode interference coupler at the input of filter is prepared. The fabricated devices show spectral broadened 3-dB bandwidth up to 3.5 nm, interchannel non-uniformity <0.7 dB and excellent match simulation results.
To solve the problem of shortage higher education resources, limited resources have to be allocated more efficiently and reasonably. In view this point, optimization allocation method is investigated in paper. An model designed according social contribution capability education. And achieve optimal solution model, algorithm based on genetic proposed. By can optimized improved. The proposed provide a reference scheme take full use resources.
Cloud-based services for federated learning has received widespread attention its ability to collaboratively train a model without collecting users' local data. Although there are existing methods such as homomorphic encryption and secure multi-party computation address the privacy issues associated with parameter exchanging during aggregation, these will inevitably lead huge communication overheads or slow down training time. Functional (FE) is considered new approach privacy-preserving...
Recently, the negative absorption in graphene-based metamaterials became a very attractive direction of THz electronic devices. Here we propose graphene-dielectric hybrid meta-structure to realize photo-induced enhanced regime, which results from strong graphene-light interaction. The is derived degradation conductivity graphene under optical pump. Meanwhile, introduces dispersion relation and resonance mode, can couple with incident wave construct resonance. In this case, both propagating...