Dike health inspection is crucial in river channel regulating. The conventional manual collapse inefficient and costly so that the unmanned aerial vehicle (UAV)-based has been widely applied. However, existing vision-based defect detection methods face challenges, such as lack of sample data closed specified sets. To address them, a method based on improved YOLOv5 recognition combined with imag...

The MESSENGER mission revealed, for the first time, conclusive evidence of explosive volcanism on Mercury. Several previous works have cataloged the appearance and location of explosive volcanism on the planet using a variety of identifying characteristics, including vent presence and deposit color as seen in multispectral image mosaics. We present here a comprehensive catalog of vents of likel...

in this paper, it has been shown that there is a special relation between horizontal and vertical gradients of gravity data and the vertical and horizontal components of magnetic data for some of 2-d sources. it has been shown that the hilbert transform is useful in calculating the vertical gradient of gravity and magnetic anomalies from the horizontal gradient for transformation of gravity and...

MSc THESIS APPLIED MATHEMATICS " Numerical treatment of stochastic control problems by Fourier-cosine expansions, the dike height problem " I would like to acknowledge the advice and guidance of my supervisor Prof.dr.ir. C.W. Oosterlee. I also thank the members of my graduate committee and the members of the department at the CWI. Special thanks go to Bowen Zhang and Fang Fang, for helping me w...

During construction of a dike, slope stability often reaches critical levels, due to the excess pore water pressures in foundation. The loading condition during has similarities with design conditions flood loading. Not only terms as main driving force, but also criticality stability. This paper examines how information survival stage can be used improve reliability estimate for dike conditions...

Dike-ponds in fisheries often present multiple pond conditions such as pure, suspended sediment, water bloom, semidry conditions, etc. However, the impact of these on performance extracting dike-pond from remote sensing images has not been studied. To solve this problem, we explore existence impacts by comparing four rule-based methods two groups test regions. The first group few while second m...

The orientation of crustal seismic anisotropy changed at least twice by up to 80 degrees because of volcanic eruptions at Ruapehu Volcano, New Zealand. These changes provide the basis for a new monitoring technique and possibly for future midterm eruption forecasting at volcanoes. The fast anisotropic direction was measured during three seismometer deployments in 1994, 1998, and 2002, providing...