A5085695096- Geotechnical Engineering and Underground Structures
- Railway Engineering and Dynamics
- Ultrasonics and Acoustic Wave Propagation
- Education and Work Dynamics
- Geoscience and Mining Technology
- Neural Networks and Applications
- Innovative Educational Techniques
- Industrial Technology and Control Systems
- Geophysical Methods and Applications
- Geotechnical Engineering and Soil Stabilization
- Civil and Geotechnical Engineering Research
- Magnetic Field Sensors Techniques
- Innovative concrete reinforcement materials
- Smart Materials for Construction
- Inertial Sensor and Navigation
- Sensor Technology and Measurement Systems
- Seismic Waves and Analysis
- Higher Education and Teaching Methods
Shijiazhuang Tiedao University
2009-2024
Beijing Jiaotong University
2017
As the main disease of railway tunnels, void affects safe operation railways. The traditional detection technology recognition relies on intuitive characteristics signal, there are still problems such as poor edge capability and low intelligence level. To solve this problem, study used Comsol software to establish a sound-solid coupling finite element model tunnel, extracted acoustic signals voids under various conditions, analysed signal different conditions proposed sensitive frequency...
In the field of non-destructive testing (NDT) for concrete structures, traditional air-coupled impact-echo technology often has problems complex operation and low efficiency. order to solve these problems, this study uses Comsol software establish a finite element model (FEM) structure with different void sizes obtains variation rule peak frequency. The recognition property based on frequency is proposed, which explained validated by relevant theory experiments. results show that compared...
Different modelling methods based on neural networks have become popular and been widely used in a great variety of fields. The properties cements were predicted by network according to their chemical compositions, fineness, other factors this paper. results showed that generalized regression (GRNN) has higher accuracy faster training speed compared with BP network. maximum relative errors the hydration heat compressive strength GRNN less than 5% 9%, respectively.
Intelligent odometer is designed using hall effect to avoid the defect of mechanical odometer. The speed and mileage are measured by sensor method pulse detection. double frequency circuit used can improve precision system. User interface system designed. It automatic alarm if exceeds limit. max be setup user. as well controlled in
It is very important for the existence and development of higher education to build up quality consciousness, establish idea guarantee construct a scientific system education. According disadvantages traditional standing on reality reform, paper mainly analyses arduousness facing challenges founding in China.