A5006851054- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Metamaterials and Metasurfaces Applications
- Hydraulic and Pneumatic Systems
- Advanced Wireless Communication Technologies
- Fluid Dynamics and Turbulent Flows
- Antenna Design and Optimization
- Blockchain Technology Applications and Security
- Advanced Combustion Engine Technologies
- Maritime Transport Emissions and Efficiency
- Semiconductor materials and devices
- Boron and Carbon Nanomaterials Research
- Electric and Hybrid Vehicle Technologies
- Fluid Dynamics and Vibration Analysis
- Radar Systems and Signal Processing
- Advanced Sensor and Control Systems
- Metaheuristic Optimization Algorithms Research
- Advanced Multi-Objective Optimization Algorithms
- FinTech, Crowdfunding, Digital Finance
- Graphene research and applications
- Advanced SAR Imaging Techniques
- Hybrid Renewable Energy Systems
- Wind and Air Flow Studies
- Radio Wave Propagation Studies
- Fullerene Chemistry and Applications
National University of Defense Technology
2023-2024
University of Nottingham Ningbo China
2023
Central South University
2022
Harbin Engineering University
2021-2022
Lehigh University
2002
Peking University
1993-1996
In this article, we propose a method based on time coding metasurface (TCM) to modulate the characteristics of radar targets in complex high-resolution range profiles (HRRPs). Unlike existing works where metasurfaces are typically attached target surfaces, our work, and controlled separable, making modulation more flexible. The proposed involves controlling equivalent scattering phase distance offset false within HRRP, which generated through TCM by adjusting parameters. combined same unit...
This letter presents a wideband Huygens resonant transmitarray (TA) based on lightweight polyimide (PI) membranes. A three-resonant structure unit is proposed by introducing additional resonance points for broadening the bandwidth. The unit, consisting of two pairs metal rings and one pair arcs, exhibits low transmission loss covers almost entire phase range over wide band from 17.5 to 23 GHz. Moreover, units are printed PI membranes using screen printing technology. TA consists only layers...
Magnetic nanoparticles (NPs) hold great promise for both fundamental research and future applications due to their unique structural features, high specific surface area, tailored physical properties. Here, we present a convenient thermal co-evaporation approach deposit Co–C60 composite films with controlled composition, structure, morphology, tunable performances, specifically designed spintronic device applications. By tuning the growth rates of Co C60 during co-evaporation, composition...
Two-dimensional ternary transition metal chalcogenides (TMCs) have aroused great research interest owing to outstanding semiconducting properties and diverse magnetic response. CuFeTe2, as a typical TMC, exhibits ambiguous behavior ground state of spin density waves nature. Herein, we first report efficient nonlinear absorption superior refraction CuFeTe2 nanosheets. The coefficients reach −0.22 cm/GW −1.66 × 10–12 cm2/W, respectively. Semiempirical theory for direct bandgap semiconductors...
In this paper, a joint magnitude-and-phase (MAP) equivalent model based on space-time-coding (STC) metasurface has been proposed to achieve suppression of sidelobe level (SLL) under normally incident plane waves. The approach addresses the limitation traditional phase-only metasurfaces, which cannot form relative magnitudes between elements for special weight fitting. Numerical simulations demonstrate that by establishing appropriate time sequences, peak (PSLL) across all steered angles can...
Researchers have developed and examined space-time adaptive processing (STAP) schemes to cope with the clutter spectral spreading that occurs for a radar mounted on moving platform. Analysis shows these great potential when used good estimates of interference-plus-noise statistics. In practical situations may be very inaccurate. This is case studied here. A general formulation STAP algorithm defined several specific cases are described studied. Both simulated data measured in tests. The...
In recent years, with the improvement of engine technology, adjustable structure among systems has become more and complex, especially in transient state, change system state will have a certain impact on normal operation engine. order to optimize comprehensive performance engine, it is necessary study control coupling between multiple systems, Therefore, important characteristics actuator its hysteresis law under conditions system, as well influence process performance. This paper mainly...
Abstract As a more efficient power machine, diesel engine is widely used in industry, large vehicles, ships, generation and other industries. Because of its high thermal efficiency, low fuel consumption, strong long service life, will continue to occupy leading position application field the coming decades. Therefore, speed control has always been hot research topic. However, there are some disadvantages if only using PID controller for control. This paper studies structure form neural...
In the new era, Tiktok platform has attracted a large number of users with short video and live broadcast functions, forming huge user group, platforms purchasing power gradually increased, providing rich profit opportunities for entrepreneurial users. realizes business value through output users, both parties achieve mutual benefit in game. This paper mainly studies how can make better profits game theory. The problem is analyzed by two aspects which are model ecology relationship between...
In this paper, a wideband conformal programmable metasurface (PM) is proposed for tunable radar cross section (RCS) reduction. A PIN diode soldered between two symmetrical wing-type patches and diodes in each column maintain the same on/off state. The 1-bit phase shift within $180^{\circ} \pm 20^{\circ}$ over wide band from 8 GHz to 12 GHz. Due flexibility of silica gel substrate, $20 \times 20$ PM conformally attached cylinder. simulated results show flat achieves good performance RCS...
As a more efficient power machine at present, diesel engine is widely used in industry, large vehicles, ships, generation and other industries. Because of its advantages high thermal efficiency, low fuel consumption, strong long service life that will continue to occupy leading position application field the next few decades.[1] However, because uses complex hydrocarbons as fuel, air pollution caused by exhaust gas very serious, so development future must shift from concept only economy...