phase crossover

To simplify the computation, the estimate equations of trajectory parameter of boost phase, crossover phase and maneuvering phase in ballistic missile's flying were brought out by approximate treatment according to the motion equation of mass center for missile in this paper.

为简化计算，根据导弹的质心运动方程，通过近似处理导出了导弹机动飞行中助推段、跨越段和机动段弹道参数的估算公式。

The bandwidth of non-minimum phase system can't reflect dynamic characteristics. Crossover frequency ω_c is the performance index instead of the bandwidth, and the ω_c must be less than the non-minimum-phase zero a.

非最小相位系统的带宽不能反映系统的动态特性，应该采用穿越频率ωc代替带宽作为性能指标，且ωc应小于非最小相位的零点a。

These models are the resin damping function and the crossover friction of the warp and weft tows in the shearing phase.

在剪切锁定前阶段，建立树脂的阻尼计算模型，经、纬向纤维束在交叉处的摩擦的计算模型。

METHODS: Each subject participated in a three-phase randomed crossover study. 2. Subject crossover.

方法：各受试者按随机交叉设计进行三次试验，分别为：（1）不服用药物；其次，学科交叉研究。