对象是以一种阶梯方式布置的。
本文对稳定的线性时不变系统提出了一种阶梯模型近似。
A stairs model approximation for stable linear time-invariant system is given in this Paper.
本发明涉及一种阶梯递减式尼古丁生理脱瘾香烟的制造方法，属控烟戒烟领域。
The invention relates to a manufacturing method of a step-decreasing physiology nicotine detoxification tobacco, belonging to the smoking controlling and smoking quitting field.
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