S-shape Heuristic Transport Strategy

Along with the logistics development, how to reduce the physical distribution cost to become a hot topic of discussion, the warehousing receives as a logistics important link takes seriously. Domestic and foreign scholars on how to walk on the warehouse trucks, how to arrange the goods are made in-depth research, but for auction logistics studies will obviously deficiencies. Auction Logistics main auction the goods in accordance with the winners of different methods for sorting, sorting efficiency can use points goods time, also can be measured by the total distance trucking length for index. Auction logistics and warehouse layout, shelves emissions and sorting truckloads of walking strategy etc, have inseparable relationship. This paper studies the use of S-shaped transport strategy for cargo sorting heuristic when the travel distance problem. The different warehousing layout and the transportation channel's arrangement, is influential to the S shape heuristic transportation strategy, One-way channel layout can save storage space, but the unidirectional channels in limiting conditions of transport strategy is more, its transport strategy did not set is optimal; Two-way channel is improved to one-way channel, it of vehicle in channels in the driving direction without limitation, which makes the width of the longitudinal channels to allow at least two tractor to pull (side by side road), in addition to the width of the longitudinal channels required outside, still need to consider the junction of driving congestion problem. This article carries on the analysis to under dissimilar condition's S shape heuristic transportation strategy, obtains under the dissimilar condition the trailer tractor travel concrete distance formula.This article carries on the analysis separately from several aspects:1,Under the single region simplex channel's condition, carries on the analysis to the S shape transportation strategy. One-way channels in the limits of transportation direction is clear, parity channel traveling direction is fixed, so in calculating the transportation distance can be divided into three sections:From the entrance to the first storage blocks distance+ except the first and last a storage blocks outside the distance between the other storage blocks+ the last storage blocks to the entrance of the distance. Can be drawn from the analysis, a single regional transport strategy for one-way channel S-shaped channel of transport distance with channel parity has the very big relations.2,Bidirectional channels in a single regional conditions, the linear transport strategy for analysis. Transport Strategy linear direction of travel within the channel is not clearly defined, which the width of the vertical channel more demanding, at least two tractor to ensure that travel side by side, but also in the intersection of horizontal and vertical channels, arrange transportation to place the order, to avoid traffic chaos. The same calculation in the distance will be calculated from the three-part, two-way channel linear transport strategy within the current channel is mainly affected by the direction of travel.3,Bidirectional channels in a single region under the conditions of transport strategy for turn-back type transport strategy analysis. Turn-back type transport strategy in the current channel allows vehicles inside the direction of walking replacement, therefore channel width should not only allow the two vehicles driving side by side, still must give the vehicle turning direction leave enough space. Because of this type of transport strategy turn-back only considering the current situation and channel of goods sorting without taking into consideration other general goods distribution situation, so transportation distance only with the current channel driving direction and coordinate relevant goods.4,In the two-zone conditions, the discussion of the integral style and the partition type of transport strategy. The integral type is treats as the double region a big single region to carry on the distance the computation; the district type is saves double region two region to treat as the independent memory region to carry on the discussion. Discussed the center-section-like transportation strategy in the district transportation strategy, its strategic point is that every time after sorting all need dumpers back among the line channel, its distance formula is mainly affected by the position of adjacent storage blocks, need to determine whether the next storage blocks and the current storage blocks in the same storage area, is a north storage area or south storage area.