However, the GM (1, 1) Model requires high stationary of the original data and concave data lines trend which has big gray plane.
但是，GM(1,1)模型对于原始数列的平稳性要求较高、数列连线趋势只能为内凹型、灰平面较大。
The present study numerically investigated a conceptual type of internal steam cooling vane with the impingement cooling technology on the basis of plane model and concave model.
在对射流冷却平板模型和射流冷却凹板模型数值模拟的基础上，设计了射流冲击冷却式蒸汽冷却叶片，并对其进行了热耦合数值模拟。
The differences of the passive mode-locking by the SESAM in the plane-concave stable resonator and the plane-convex unstable resonator lasers were experimentally compared and reasonably explained.
实验比较了SESAM器件在平凹稳定腔和平凸非稳腔激光器中实现被动锁模的差异，并给出理论解释。
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