A5102890563- Ultrasonics and Acoustic Wave Propagation
- Non-Destructive Testing Techniques
- Geophysical Methods and Applications
- Photoacoustic and Ultrasonic Imaging
- Climate Change Policy and Economics
- Flow Measurement and Analysis
- Environmental Impact and Sustainability
- Thermography and Photoacoustic Techniques
- Advanced Fiber Optic Sensors
- Structural Health Monitoring Techniques
- Energy, Environment, and Transportation Policies
- Antenna Design and Analysis
- Ultrasound Imaging and Elastography
- Environmental and Agricultural Sciences
- Material Properties and Processing
- Environmental Changes in China
- Fault Detection and Control Systems
- Antenna Design and Optimization
- Microwave Engineering and Waveguides
- Dielectric materials and actuators
- Phytoestrogen effects and research
- Elasticity and Material Modeling
- Global Energy and Sustainability Research
- Energy Efficiency and Management
- Epoxy Resin Curing Processes
China Electronics Technology Group Corporation
2024
University of Electronic Science and Technology of China
2024
Hubei University of Medicine
2024
Taihe Hospital
2024
Harbin University of Commerce
2024
Beijing Institute of Technology
2015-2023
University of Oxford
2023
Taichung City Government
2023
Nanchang Hangkong University
2013-2022
Chongqing University of Posts and Telecommunications
2021-2022
Abstract A strategy that informs on countries’ potential losses due to lack of climate action may facilitate global governance. Here, we quantify a distribution mitigation effort whereby each country is economically better off than under current pledges. This effort-sharing optimizing approach applied 1.5 °C and 2 warming threshold suggests self-preservation emissions trajectories inform NDCs enhancement long-term strategies. Results show following the reduction efforts, whole world would...
The utilization of prefabricated components is taken as a potential way to reduce carbon emissions from the construction industry, and prefabrication rate may be factor that influences mitigation efficiency. This study develops an assessment method compare building in stage when it built with multiple different rates. Firstly, two sources (building materials machineries) three sub-phases (production components, transportation, on-site construction) are determined clarify calculation...
In order to overcome the drawbacks of traditional method measuring a lithium-ion battery’s state-of-charge by charging and discharging its voltage curve, based on air-coupled ultrasound is proposed, which slows aging battery. Analysis conducted propagation characteristics in battery using Biot’s fluid-saturated porous media model; signal monitored real time monitoring ultrasonic waves during charging, fast-wave slow-wave signals are obtained. Firstly, fast-amplitude value domain analyzed,...
In the paper, an extremely compact multiple-input-multiple-output (MIMO) antenna is proposed for portable wireless ultrawideband (UWB) applications. The prototype consists of four monopole elements, which are placed perpendicularly to achieve polarization diversity. addition, mutual coupling between elements suppressed by designing gap radiation element and ground plane. Moreover, a matching stub has been connected feedline ensure impedance in high frequency. Both simulated measured results...
Breast cancer is a very common malignant tumour that typically occurs in women aged 35–70 years (accounting for 85% of patients). Recently, it has been appearing younger as well. Traditional ultrasonic transducers usually use fixed array, which avoids the radiation from mammography, low cost, and can be used repeated testing. This substantially benefits clinical diagnosis breast cancer. However, transducer-array process exerts considerable pressure on human body, easily cause mass...
Metal materials will produce fatigue cracks under long-term cyclic loading. It is difficult to fully image the topography of defects with current mainstream ultrasound imaging technology. The Reverse time migration (RTM), which has extensive application in geophysical exploration, can complex geological structures. This research introduces RTM into field ultrasonic non-destructive testing. Through numerical simulation, it concluded that based on no absorbing boundary make defect contour...
The ultrasonic transmission spectrum in a double-layered bonded structure is related closely to its interfacial stiffness. Consequently, researching the regularity of significant interest evaluating integrity structure. Based on spring model and potential function theory, theoretical developed by transfer matrix method predict Some shift rules peaks are obtained numerical calculation this with different substrates. results show that resonant move towards higher frequency increase normal...
Abstract China, the second largest economy in world, covers a large area spanning multiple climate zones, with varying economic conditions across regions. Given this variety and conditions, global warming is expected to have heterogeneous impacts country. This study uses annual average temperature conduct an empirical research from top-down perspective evaluate nonlinear of change on aggregate output China. We find that there inverted U-shaped relationship between growth at provincial level,...
Because free-riding behavior is an inherent characteristic of climate change, how to protect the economic benefits emission reduction regions and prompt noncooperative region join coalition particularly important. In this study, we use a global multi-region multi-sector CGE model compare impacts border carbon adjustment (BCA) two unified tariff mechanisms based on different implementation principles USA. The results show that BCA more effective in reducing leakage USA than uniform...
This paper introduces an extended non-stationary phase-shift migration (ENSPS) method for ultrasound imaging of irregular surface components. extends (NSPS) technology based on the classical B-scan data to full-matrix capture (FMC) data. In addition, a new estimation (SEM) is also proposed prepare ultrasonic The implemented in frequency domain, thereby ensuring computational efficiency. numerical simulation, two components with different shapes were simulated study ability hole defects and...
The reflected waves received from ultrasonic propagating in materials contain information that constitutes the physical properties, material composition, defects, and degradation states. When measuring dynamic viscoelasticity, traditional bottom reflection method (BRM) cannot be used to measure irregular samples. In this paper, storage modulus, loss tangent are extracted by surface (SRM) evaluate elastomer sample viscoelasticity. A theoretical study on phase change caused multiple...
For the complexity of unmanned aerial vehicle models and bad robustness such problems, this paper designs an Active Disturbance Rejection Control (ADRC) to achieve high-performance control. And kind ADRC is based on fourth-oder extended state observer, arrangement process nonlinear feedback. Firstly, pitching angle model validated. Based it, compares different effects PID controller. Finally, analyzed. The result simulation experiment indicates that shows better than controllers control,...
Rubber, as a kind of macromolecular material often used in large ships, aviation, aerospace, and other fields, has remarkable viscoelasticity at room temperature. Therefore, it is great significance to evaluate the viscoelastic properties polymer composites. In this paper, four kinds rubber materials are taken research objects. Based on principle ultrasonic detection, evaluation sample carried out through experiments simulations. On basis previous research, surface reflection method (SRM)...
We have developed the V transmission system using for online scanning, insitu-defects testing and automatic detection by Non-contact Air Coupled Ultrasonic Testing (NAUT), NAUT with ultra-high power square burst wave pulser & receiver. Square waves transmit receive more powerful ultrasonic than pulse wave. It is easy to obtain optimum detective condition changing of frequency numbers waves. Therefore it suitable require receiving. This paper mainly discusses non-contact air-coupled method...
Air-coupled ultrasound has shown excellent sensitivity and specificity for the nondestructive imaging of wood-based material.However, it is timeconsuming, due to high scanning density limited by Nyquist law.This study investigated feasibility applying compressed sensing techniques air-coupled imaging, aiming reduce number lines then accelerate imaging.Firstly, an undersampled strategy specified a random binary matrix was proposed address limitation framework.The can be easily implemented,...