To establish optimized-instruction criterion rationally is of great importance for the optimization of teaching theory and practice.
合理确定优化教学的标准，是优化教学理论和实践的重要问题。
This phenomenon is all existed under various kinds of optimization criterion of the progressive structural optimization design.
在渐进结构优化设计的各种优化判据下都存在这一现象。
The third one belonged to stability criterion optimization that determined the optimal number and position of wing ribs.
第三个层次为稳定性准则优化，它确定横向骨架的个数与位置的最优布局。
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