These factors must be balanced by the selection of diamond grade and concentration that will provide the operator with optimum performance at a suitable cost.

这些因素必须同时顾及挑选钻石分级及浓度，将提供最佳的营表现在一个适当费用。

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The immune memory units guarantee this algorithm rapid convergence to global optimum and the uniform crossover operator embody the idea of evolution.

算法中的免疫记忆单元确保了快速收敛于全局最优解，算法中的均匀交叉操作则体现了进化的思想。

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So it has great significancy to realize parameters optimum selection, reduce the requisition for operator, improve quality of spot welding.

所以实现点焊规范参数选择优化、降低对操作者的要求、提高点焊质量，具有重要意义。

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