The project and arithmetic how to control the vacuum deg ree are introduced by the analysis of the reason why the vacuum deg ree is unstable.
并在分析造成真空度不稳定原因的基础上，阐述了的电子束炉真空系统的控制方案及其算法。
The structural damage position and deg ree can be identified and classified, and the test result is highly accurate especially combined with principle component analysis.
当支持向量机和主成分分析结合后，试验的损伤识别效果有明显的提高。
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