A5101994048- GNSS positioning and interference
- Geophysics and Gravity Measurements
- Ionosphere and magnetosphere dynamics
- Inertial Sensor and Navigation
- Advanced Frequency and Time Standards
- Advanced Surface Polishing Techniques
- Target Tracking and Data Fusion in Sensor Networks
- Indoor and Outdoor Localization Technologies
- Integrated Circuits and Semiconductor Failure Analysis
- Semiconductor materials and devices
- Transportation Planning and Optimization
- Advanced Machining and Optimization Techniques
- Advanced Measurement and Detection Methods
- Radar Systems and Signal Processing
- Traffic Prediction and Management Techniques
- Geomechanics and Mining Engineering
- Advanced machining processes and optimization
- Traffic control and management
- Advanced Fiber Laser Technologies
- Distributed Sensor Networks and Detection Algorithms
- High-Voltage Power Transmission Systems
- Grouting, Rheology, and Soil Mechanics
- Copper Interconnects and Reliability
- Advanced Computational Techniques and Applications
- Corrosion Behavior and Inhibition
Shandong University of Science and Technology
2016-2025
Jilin University
2014-2025
Kashi University
2024
Jinan University
2024
Hefei General Machinery Research Institute (China)
2024
Hebei University of Technology
2006-2023
Ocean University of China
2023
Ministry of Natural Resources
2023
Dalian Institute of Chemical Physics
2016-2022
Chinese Academy of Sciences
2007-2022
The bipolar plate (BP) serves as one of the crucial components in proton exchange membrane fuel cells (PEMFCs). Among BP materials, metallic BPs are widely employed due to their outstanding comprehensive properties. However, interfacial contact resistance (ICR) between and gas diffusion layer together with corrosion under acidic operating conditions degrades performance stability PEMFCs. Herein, an approach is proposed for surface reinforcement titanium (Ti) alloy BPs, relying on a directly...
Epidermal electronics are extensively used in human-machine interfaces and wearable sensors. However, managing sweat gas permeability at the skin-device interface to ensure comfort prevent skin damage during prolonged use remains a key challenge. Inspired by fog collection mechanism of cactus spines trichomes, this work develops biomimetic, flexible epidermal electronic device with high unidirectional water transport capability. The exhibits excellent flexibility (Young's modulus: 0.02 MPa),...
The Inertial Navigation System (INS) and Doppler Velocity Log (DVL) combination navigation system has been widely used in Autonomous Underwater Vehicles (AUVs) due to its independence, stealth, high accuracy. Compared the standalone INS or DVL, integrated provides continuous accurate information. However, underwater environment is complex, noise observation may not satisfy condition of mutual independence. In addition, DVL produce abnormal measurement values during operation. this study, an...
We report diode pumped high power 2-µm Tm(3+) fiber lasers with an all-fiber configuration. The configuration is completed by specially designed Bragg gratings similar structure parameters matched to the gain fiber. maximum output 137 W optical-to-optical slope efficiency of 62% respect absorbed 793-nm pump power. laser wavelength stabilized at ~2019 nm a spectral linewidth less than 3 across all levels. To best our knowledge, this highest from single narrow bandwidth system.
We present quad-constellation (namely, GPS, GLONASS, BeiDou and Galileo) time group delay (TGD) differential code bias (DCB) correction models to fully exploit the observations of all four global navigation satellite systems (GNSSs) for positioning. The relationship between TGDs DCBs multi-GNSS is clearly figured out, equivalence TGD DCB combining theory with practice demonstrated. Meanwhile, TGD/DCB have been extended various standard point positioning (SPP) precise (PPP) scenarios in a...
Thanks to the international GNSS service (IGS), which has provided multi-GNSS precise products, point positioning (PPP) time and frequency transfer of great interest in timing community. Currently, PPP is not investigated with different products. In addition, correlation receiver clock offsets between adjacent epochs been studied PPP. this work, products first compared detail. A offset model, considering using an a priori value, then employed improve (scheme2). Our numerical analysis clarify...
Global Navigation Satellite Systems (GNSS) integrated with Inertial (INS) have been widely applied in many Intelligent Transport Systems. However, due to the influence of various factors, such as complex urban environments, etc., accurately describing measurement noise statistics GNSS receivers and inertial sensors is difficult. An inaccurate definition covariance matrix will lead rapid divergence position error navigation system. To overcome this problem, paper proposed a Robust Adaptive...
For the global ordinary users, broadcast ephemeris plays important roles in positioning, navigation and timing (PNT) services. With construction of a new generation BeiDou satellite system (BDS), development BDS has entered era globalization. It is meaningful for users to analyze assess BDS-2 BDS-3 ephemeris. Therefore, orbits clock offsets calculated by are compared with precise orbit offset products provided three analysis centers (i.e., Helmholtz Centre Potsdam German Research Center...
Abstract Aerobic exercise is effective in alleviating mood symptoms while the mechanism poorly understood. There are limited clinical trials that investigated effect of on anterior cingulate cortex (ACC), a key brain region involved regulations, adolescents with subthreshold syndromes. This randomized controlled trial (RCT) aerobic was undertaken middle school Guangzhou, China. Participants were aged 12–14 syndromes including depressive and manic randomly assigned to an intervention or...
ABSTRACT To gain a comprehensive understanding of the energy dissipation double-suction pump, analysing loss its various components is necessary. However, liquid temperature in pump remains almost constant, using entropy production or method to evaluate difficult. The traditional analysis based on pressure drop cannot quantify internal changes each component. solve this problem, evaluation approach developed basis theoretical and numerical prediction, effects cavitation are investigated....
International time transfer based on Global Navigation Satellite System (GLONASS) precise point positioning (PPP) is influenced by inter-frequency code biases (IFCBs) because of the application frequency division multiple access technique. This work seeks to gain insight into influence GLONASS IFCBs international GLONASS-only PPP. With a re-parameterization process, three IFCB handling schemes are proposed: neglecting IFCBs, estimating for each number, and satellite. Observation data...
The real-time traffic status estimation in urban signalized intersections is highly valuable for modern control and management. This paper presents a queue length method based on probe vehicles' data the connected vehicle (CV) environment. are used to identify stopping states of CVs. Based this, time series referring positions CVs built describing queuing process at an intersection. Considering statistical average rate, historical cycles, CV arrival features current cycle, critical...
In this work, quad-frequency precise point positioning (PPP) time and frequency transfer methods using Galileo E1/E5a/E5b/E5 BDS-3 B1I/B3I/B1C/B2a observations were proposed with corresponding mathematical models. addition, the traditional dual-frequency (BDS-3 B1I/B3I E1/E5a) ionospheric-free (IF) model was also described tested for comparison. To assess method transfer, datasets selected from timing labs utilized tested. Moreover, number of or satellites, pseudorange residuals, accuracy...
Pedestrians are some of the worst victims, as one weaker groups in road traffic accidents, but, at same time, their unsafe behaviors also an important factor accidents. This paper builds a pedestrian crossing hazard automatic-balance model and waiting-time threshold by analyzing process which pedestrians cross street. Then, reasons for pedestrians’ behavior when street analyzed using psychology. Finally, this puts forward measures, based on aspects psychology, to reduce or alleviate behaviors.