Fields distinguished by edges and middles visited by heterogeneous vehicles to minimize non-working distances

摘要: Abstract In rice-wheat rotation systems in China, all vehicles working fields have to make turns because these are surrounded by canals on three sides. All can be divided into two parts – the middle and edges which include head, tail, sides of field. general, a field’s edge is visited only small vehicle it has lighter weight soil does not easily become compacted due vehicle’s many sideways cuts. addition, workers heavy cannot distinguish ridges crops fields. Therefore, visit after already been completely worked vehicles. A general framework including bi-level programming model two-stage algorithm constructed tabu search proposed optimize non-working distance intra- inter-fields for heterogeneous based distinguishing middle. model, lower level determines vehicles’ routes middles will vehicles, upper optimal Then, case study presented verify effectiveness efficiency solution approach. The total reduced 24.2%, significant amount compared with operational schedule farm. This proposes farmers