A5004880615- Catalytic Processes in Materials Science
- Advanced Photocatalysis Techniques
- CO2 Reduction Techniques and Catalysts
- Advanced Measurement and Detection Methods
- Wireless Communication Networks Research
- Engineering and Test Systems
- PAPR reduction in OFDM
- GNSS positioning and interference
- Copper-based nanomaterials and applications
- Gas Sensing Nanomaterials and Sensors
- Advanced Wireless Communication Techniques
- Catalysts for Methane Reforming
- Radio Wave Propagation Studies
- Advanced Computational Techniques and Applications
- Inertial Sensor and Navigation
- Antenna Design and Optimization
- Radar Systems and Signal Processing
- Maritime Navigation and Safety
- Advanced Adaptive Filtering Techniques
- Machine Learning in Materials Science
- Electrocatalysts for Energy Conversion
- Optical measurement and interference techniques
- Railway Systems and Energy Efficiency
- Genetic and phenotypic traits in livestock
- Satellite Communication Systems
Henan University
2022-2024
China Ocean Shipping (China)
2017-2019
In this paper, we propose a timing synchronization method for orthogonal frequency division multiplexing (OFDM) systems by exploiting the averaged differential correlations of preamble symbol. For designed simple whose second half-symbol is complex conjugate first one in time-domain, proposed has an impulse-shaped metric. Simulation results indicate that improves estimate mean square errors (MSE) performance remarkably than conventional methods at low signal-to-noise ratio (SNR) multipath...
Titanium dioxide (TiO2) with defects is a promising semiconductor photocatalyst for photoreduction CO2, due to its unique electronic properties. However, defective TiO2 difficult achieve high yield of CO2 photoreduction, especially the high-value-added C2+ hydrocarbons, slow transfer multielectron/proton and sluggish C-C coupling kinetics. Here, we combine photoinduced deposition copper (Cu) nanoparticle on titania (TiO2-SBO) thiocyanate anion (SCN-, KSCN) surface modification via...
The separation efficiency of photo-generated carriers is still a great challenge that restricts the practical application photocatalysts. synergistic implementation atomic-level charge strategies for bulk–surfaces has emerged as innovative approach to address this challenge. Therefore, it important understand how controllably engineer photocatalysts at atomic level. Here, we report first time engineering doping in combination with surface ion grafting was coordinated facilitate significant...
Carrying out the calibrate by placing ball on sea has some disadvantages, such as high cost, low efficiency, etc. Based this point, a maritime calibration method based fixed-wing UAV is proposed. Firstly, choosing appropriate model for marine application analyzing characteristics of tracking ships' application, and route planning suitable during navigation process ships By studying digital guiding scheme tracking, remote beacon frequency modification system designed produced. Secondly,...
Starting from the problems of four kinds no tower calibration methods, analyzed phase characteristics curve a ship-borne Unified C-Band (UCB) system, and refined changing regulations offset curve, proposed towerless method based on piecewise linear fitting, feasibility practicability is verified by tracking different frequency beacon balls together with theodolite, comparing data theodolite's.
This paper is to extend the applications of TDRSS and provide a new thread for survey ship acquire position. An algorithm shipborne TDRSS/SINS integrated navigation proposed by using one-way Doppler autonomous TDRSS. The observation equation with data received from deduced. SINS state deduced, then Kalman filter theory. accuracy analysed in end. result shows that high can be deduced while depends on numbers satellites observed constellation; still it used as an emergency plan substitute GPS.
Cu metal clusters loading on the surface of TiO2 can catalyze reduction CO2 to C2+ products. However, details mechanism this reaction is still not clear. Besides, are there any other replace cluster? In work, C-C bond forming by two CO* several (Cu, Ga, Co, Fe, Ni, Pt, Pd, Mo, and Zr) (101) (M10@TiO2) were investigated climbing image nudged elastic band (cNEB) within density functional theory (DFT). We found energy barrier Cu10@TiO2 ~0.7 eV. On Zr10@TiO2, similar as that Cu10@TiO2....
Cun@TiO2 nanocatalytic materials are widely used in experiments to catalyze the reduction of CO2 hydrocarbon fuels and oxygenated alcohols. However, due complexity coupling reaction catalyst form key C-C bonds C2 products, it is unclear. Therefore, this paper uses density functional theory (DFT) systematically study influence size Cun clusters (or Cu cluster coordination) on bond formation Cun@TiO2. It was discovered that adsorption metal different sizes TiO2 primarily determined by bonding...
In this paper, the theory and design of mono-pulse radar amplitude-phase calibration based on AD sampling are introduced. The methods analyzed. According to theory, a fast-calibrating method that is simulator designed. By testing method, experiment results show effective convenient.
A power combining solution using magic-T is presented to apply in a shipborne X-band transmitter. According scatter parameter theory, the factors that have influence on efficiency are analyzed; and max output calculated. The results show that: (1) has advantage of small size, simple structure, good heat dissipation performance, so it suits situation well. (2) depends mostly insertion loss, amplitude phase input signal. (3) 1kW can be satisfied presented.
The paper introduces the basic situation of modern shipborne TT&C system high frequency receiver, and describes reason harm intermodulation interference in receiver. Taking converter box as an example, from theoretical analysis engineering case respectively, this analyzes investigates interference, thus pinpointing fault location putting forward solution, to effectively reduce influence on system.
The bandwidth of servo system for ship radar was confined, as a result low resonant frequency. main factor error acceleration lag the II system. article submitted new technique complex control to solve this problem and prevent loss target. When method feed-forward compensation adopted, dynamic decreased obviously.
The upcoming non-terrestrial network communication system will comprise unmanned aerial vehicles (UAVs) and satellites as platforms providing broadband service in the future. conventional UAV monopulse tracking technique at ground station receiver requires dedicated signals which suffer from multipath effect air-to-ground (A2G) link with low elevation angles. As an essential physical layer 5G wireless networks, orthogonal frequency division multiplexing (OFDM) under fading channel was not...
BiVO3F is a promising material used in solar energy conversion systems. Here, we first report the calculated structural, electronic, and surface reaction properties using PBE hybrid density functionals. We found it direct band gap semiconductor, consistent with experimental value only functional fraction of Hartree Fock (HF) exchange α=0.1. The (001) most stable among all low index (001), (010), (100) surfaces. There are V Bi sites exposed on which can serves as activity sites. That quite...