Method for improving loading efficiency of container based on minimum freedom degree poriority principle
A container and degree of freedom technology, which is applied in the fields of instruments, calculations, electrical digital data processing, etc., can solve the problems of low space utilization rate and fragmented space that cannot be fully utilized
Inactive Publication Date: 2007-11-07
TSINGHUA UNIV
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It can be seen from the top view and side view that the LL method takes care of the largest module during the placement process of each layer, and the fragmented space generated when filling and placing smaller modules cannot be fully utilized, so the space utilization rate of the LL method is very low. However, due to its simple operation and fast calculation speed, it is still the mainstream solution at present. Most of the algorithms are improved or optimized based on this idea.
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[0083] From a physical point of view, according to the LFF method, two steps are required to fill and place a module. First, a series of candidate solutions should be proposed; second, for each candidate solution, after operating in a certain way (described in detail below), select the best solution we think.
[0084] Step 1: First arrange the m modules that need to be placed in the order of the longest side from large to small. When the longest sides are equal, arrange them in the order of the second longest side from large to small to form a sequence of modules to be placed {Mi}. Record all available corner positions in the container. The first module M1 in the sequence of modules to be placed is simulated and filled in each corner position of the container along different placement directions to form n1 placement candidate schemes (M1 1 ~M1 n1 ). Then M1 is taken out of the container, and the module M2 is filled in to form n2 placement candidate schemes (M2 1 ~M2 n2 ),...
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The invention relates to a method for upgrading the loading efficiency of container based on the principle that the minimal freedom is prior, which belongs to loading technology field in transmission technology. The method can be applied to problem for loading the rectangular object into rectangular container. Its character lies in: it provides a candidate plan from all models in the container according to the principle of minimal freedom through the computer simulation, and selects the optimized plan from the candidate plans according to the principle, repeats above mentioned two steps, thus confirms the several models needed to be loaded in the container, and each model is placed along which direction, and the concrete position in the container, finally outputs the arrangement series of several models, thus the volume of the container can be used fully.
Description
technical field [0001] The method of improving the efficiency of container packing based on the principle of minimum degree of freedom priority belongs to the field of packing technology in transportation technology. This method is suitable for all problems of filling cuboid objects into cuboid containers, such as typical container packing problems or Warehouse filling problem. Background technique [0002] Nowadays, with the continuous development of the times, countless goods are loaded into various containers such as containers and carriages for transportation every day. In order to save costs, time and manpower, etc., people are always trying to find a best filling method with a faster speed, so that the container can be loaded with as much goods as possible as conveniently as possible. [0003] The LL (layer by layer-level by level) method is commonly used in today's container packing technology. This method can provide a stable and effective filling method, but with ...
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IPC IPC(8): G06F19/00
Inventor 董社勤周喆洪先龙
Owner TSINGHUA UNIV