系统宕机、高开发成本、不可控的生产环境以及满脸怒色的客户。
down systems, high development costs, unmanageable production environments and unhappy customers.
得到的结果表明，含有线性或三次参数激励的系统存在不可控区域，在该区域中异宿轨分岔总是导致混沌发生。
The results obtained here show that there exist uncontrollable regions in which chaos always takes place via heteroclinic bifurcation for the system with linear or cubic parametric excitation.
该文首先通过将随机的、不可控的需求控制问题转化为安全库存设置问题的方法，建立了库存系统的仿真模型。
A simulation model of inventory system is set up through turning the stochastic and uncontrolled demand control problem into the method of setting up safe inventory.
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