A hybrid meta-heuristic optimization method is introduced to efficiently find the optimal shape of concrete gravity dams including dam-water-foundation rock interaction subjected to earthquake loading. The hybrid meta-heuristic optimization method is based on a hybrid of gravitational search algorithm (GSA) and particle swarm optimization (PSO), which is called GSA-PSO. The operation of GSA-PSO...

Cap rocks are dams which can prevent the upward movement of hydrocarbons. They have disparities and weaknesses including discontinuities, crushed areas, and faults. Gas injection is an effective mechanism for oil recovery and pore pressure. With increasing pore pressure, normal stress is reduced, and the integrity of impermeable boundaries (cap rock, fault, etc.) becomes instable. A successful ...

Future Mars exploration missions will perform two types of experiments: science instrument placement for close-up measurement, and sample acquisition for return to Earth. In this paper we describe algorithms we developed for these tasks, and demonstrate them in eld experiments using a self-contained Mars Rover prototype, the Rocky 7 rover. Our algorithms perform visual servoing on an elevation ...

Abstract Landslide dams, forming when a landslide blocks watercourse, are significant components of slope-river systems. Dams can fail suddenly and catastrophically, threatening downstream populations structures. So it is important to understand where they could form, how long persist in the landscape, extent inundation once fail. To investigate dam formation, longevity, stability effectively A...

The construction of a cut-off wall is common reinforcement method for earth rock dams. At present, compared with the in-depth study on homogeneous dams, more and attention being paid to stability deformation dams strengthened by concrete wall. In this study, aiming at Wujing project dam wall, influence water level rise fall slope, body, crack width crest were analyzed numerical calculation in s...

Lethal control, which has been used to reduce local abundances of animals in conflict with humans or with endangered species, may not achieve management goals if animal movement is not considered. In populations with emigration and immigration, lethal control may induce compensatory immigration, if the source of attraction remains unchanged. Within the Columbia River Basin (Washington, U.S.A.),...

Soft broken surrounding rock exhibits obvious rheological properties and time-dependent weakening effects under the action of deep high-ground stress, leading to increasingly prominent problem sustained large deformation in roadways. In this study, with II5 Rail Rise Zhuxianzhuang Coal Mine as an example, mechanism control technology damage instability a soft-rock roadway were explored through ...