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Xiang J.,Chongqing Institute of Water Resources
International Journal of Earth Sciences and Engineering

This thesis adopts imperialist competitive algorithm to work out optimization problems of cascade hydropower reservoirs, which are high dimensional, non-stationary and complicated with multiple constraints. The Algorithm shows that compared with standard particle swarm optimization algorithm and genetic algorithm, imperialist competitive algorithm possesses better global optimization ability and higher convergence speed. Thus, it can be effectively applied in the optimization of cascade multi-reservoir systems. © 2014 CAFET-INNOVA TECHNICAL SOCIETY. Source

Xie L.,Chongqing Water Resources and Electrical Engineering College | Lian B.,Chongqing Water Resources and Electrical Engineering College | Shu Q.,Chongqing Institute of Water Resources | Hou X.,Chongqing Institute of Water Resources | Zhang J.,Chongqing Institute of Water Resources
Electronic Journal of Geotechnical Engineering

In this study, four level hedgerows were planted at 8 m intervals on one length of 32 m slope land. Soils were sampled at intervals of 1m from slope top to bottom, and sand, silt, and clay content were measured to evaluate the spatial distribution of soil conservation benefits for hedgerow system. It showed that, in non-hedgerow land, silt and clay content decreased, and sand content increased at locations from 0 to 11m with respect to that of 3 years ago. An average of 1.21% of clay content decreased, with largest reduce 1.97% at location of 8m from the top, and that at locations from 22 to32 m were decreasing gradually. It also showed that, clay content increased significantly along the whole slope with hedgerows compared to hedgerow-free slope. The variation of all particle contents raised with strong variability of sand and silt content. The particle contents of upslope for each hedgerow changed greater than those of downslope with maximum values at 0 to 2 m upper hedgerows. The efficiency of intercepting erosion was different for each-level hedgerow, and the spacing of hedgerow would be decreased from top to bottom in order to control soil erosion maximally. © 2015 ejge. Source

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