No external loads are applied, and one of the extreme nodes in the bottom surface is considered to have zero displacement in the longitudinal direction, while the other is fully constrained.

没有外部负载有应用，与一个极端的节点在底层外表被以为具有零位移纵向方向，另一种是完整约束的。

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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。

youdao

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