Based on fully stressed criterion, a mathematical model for spring optimization design has been built. The model is a constrained nonlinear programming problem.

按满应力准则建立了弹簧优化设计的数学模型，它是一个有约束的非线性规划问题。

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Among companies we've surveyed, fully half of all interactions are constrained by one of five barriers: physical, technical, social or cultural, contextual and temporal.

FORBES: Boosting The Productivity Of Knowledge Workers