作为一类组合优化问题，多约束条件下的三维装载问题属于NP - Hard问题，其求解也是相当困难的。
As a combinatorial optimization problem, three dimension packing problem with multi-constraints is NP-HARD problem. It is very difficult to obtain an optimal solution.
起重机装载和模拟的三维模型起重机装卸。
介绍了上海通用汽车有限公司的循环取货方式，整个路线设计分成建立路线网络、三维卡车货物装载、卡车安排及司机安排。
Cyclic goods - taking method in Shanghai GM is introduced. The entire route layout is divided into route network, 3 - dimensional track loading, truck arrangement and driver arrangement.
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