The present paper introduces the optimized design of valve springs of the internal-combustion engine by the duality method of the geometric programming with the positive term equations of constraint.
本文对内燃机汽门弹簧进行优化设计，采用了约束正定式几何规划对偶法。
The iteration of geometric programming with constraint positive negative term equations is applied to the optimal design for bolted tight connections used in pressure vessels.
对压力容器的螺柱组紧联接的优化设计，采用了约束正负定式几何规划迭代法。
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