Abstract In this paper, the elastic full-waveform inversion in frequency domain based on Green functions is investigated. The method allows to image media velocities of compressional wave and shear by using vertical horizontal components. forward problem solved finite difference scheme with perfectly matched layer domain. an optimization iterative process minimize residual between synthetic dat...

This paper presents the modular design and control of a novel variable impedance compact compliant wearable ankle robot (powered Ankle-Foot Orthosis, AFO) for overground gait rehabilitation and assistance mainly for stroke patients. Design of AFO, its construction, kinematics, working principle, actuation, control etc. are described. A novel variable impedance compact compliant series elastic a...

The human-robot interaction has played an important role in rehabilitation robotics and impedance control has been used in the regulation of interaction forces between the robot actuator and human limbs. Series elastic actuators (SEAs) have been an efficient solution in the design of this kind of robotic application. Standard implementations of impedance control with SEAs require an internal fo...

Seismic fluid identification plays an important role in reservoir exploration and development. Natural vertical fractures are common carbonate rocks, it is essential to consider fracture-induced anisotropy the of fractured reservoirs. We have developed a novel Bayesian elastic impedance variation with angle azimuth (EIVAZ) inversion approach for directly estimating fracture indicator (FFI), whi...

INTRODUCTION Problem of reservoir estimation. The optimal exploitation of hydrocarbon reservoirs requires the accurate estimation of the reservoir's characteristics. Placement of wells, injection of gas and water, and production rate of hydrocarbons depend on the correct assessment of the reservoir properties. Furthermore, the field's properties change over tim e as reservoir pore fluid is remo...

S U M M A R Y Geophysical inversion is often ill-posed because of inaccurate and insufficient data. Regularization is often applied to the inversion problem to obtain a stable solution by imposing additional constraints on the model. Common regularization schemes impose isotropic smoothness on solutions and may have difficulties in obtaining geologically reasonable models that are often suppose...