The aim of our study is to analyze the impact of insertion holes in the middle of obstacles on the flow around a surface-mounted cube, In order to do this; we studied four configurations of obstacles in a channel with a Reynods number based on obstacle height ReH = 40000. The hexahedral structured meshes were used to solve the fluid dynamics equations .The finite volume method are employed to s...

* Correspondence: mathwy@hit. edu.cn Department of Mathematics, Harbin Institute of Technology, Harbin 150001, People’s Republic of China Abstract In this paper, we introduce the obstacle problem about the nonhomogeneous A-harmonic equation. Then, we prove the existence and uniqueness of solutions to the nonhomogeneous A-harmonic equation and the obstacle problem.

This paper describes the development of a practical manipulator system. The manipulator requirements dictated by space exploration, the functional elements which meet those require­ ments, and the problems encountered in imple­ menting those requirements are discussed. The paper focuses primarily on the implemen­ tation of the functional elements and the real world problems encountered by the m...

This paper deals with the driving environment perception of cybercars from a vision system. The planification of the trajectory for an Autonomous Guided Vehicle requires to robustly segment the free space around the vehicle to manage an obstacle avoidance task. Opposite to the highways conditions, the urban environment still remains as the most complex environment due to the static scene can no...

The parabolic obstacle problem for the fractional Laplacian naturally arises in American option models when the assets prices are driven by pure jump Lévy processes. In this paper we study the regularity of the free boundary. Our main result establishes that, when s > 12 , the free boundary is a C 1,α graph in x and t near any regular free boundary point (x0, t0) ∈ ∂{u > φ}. Furthermore, we als...

The roles of visual exteroception (information regarding environmental characteristics) and exproprioception (the relation of body segments to the environment) during gait adaptation are not fully understood. The purpose of this study was to determine how visual exteroception regarding obstacle characteristics provided during obstacle crossing modified foot elevation and placement with and with...

micromixers are one of the most crucial components of lab-on-a-chip devices with the intention of mixing and dispersion of reagents like small molecules and particles. the challenge facing micromixers is typically insufficient mixing efficiency in basic designs, which results in longer microchannels. therefore, it is desirable to increase mixing efficiency, in order to decrease mixing length, w...

This paper presents a hierarchical motion planner for humanoid robots navigating complex environments. We use a workspace decomposition that allows our planning algorithm to be separated into high-level, subgoal, and local algorithms. The workspace decomposition consists of a passage map, obstacle map, gradient map, and local map. We verify our approach using a virtual humanoid robot in a simul...

Different methodologies for manipulators have been proposed and applied to robot obstacle detection avoidance in unstructured environments. These methods include different real-time sensors, observer-based algorithms, path planning using genetic algorithms. However, sensor design integration is complex considerably expensive. Moreover, the observer algorithm requires complete system dynamics in...