This paper discusses the advance of computer aided design, analysis and optimum in packaging engineering, and introduces the technology of net aided packaging design.
结合包装工程学科的有关领域，论述了计算机辅助包装设计、分析与优化的若干进展，介绍了网络辅助包装设计技术。
Training a multilayer neural net by BP algorithm is slow and it is difficult to choose the number of hidden units and layers in advance.
使用BP算法训练多层网络的速度很慢而且事先难于确定隐节点和隐层的适当数目。
The net friends can advance their questions freely as well as help other people solve the problems, or exchange experience.
网友可以自由地提出问题以及帮助他人解决问题，或者交流经验（略）。
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