因为随机过程理论并不是本课要求的先修课程，所以本课的重点将放在确定性(非随机)的分段集中参数系统上。
Because random process theory is not an assumed prerequisite for this text, emphasis will be on deterministic (nonrandom) lumped parameter systems.
到目前为止，关于激光-电弧复合热源焊接的研究主要集中在应用方面，而涉及到电弧特性及过程稳定性等基础理论，仍有许多问题亟待解决。
By far, research about laser-arc hybrid welding is mostly concentrated on the application and there is still much problem to solve come down to the arc properties and the stability of welding process.
另外，本文用模糊集理论对时间序列数据挖掘过程中的不确定性进行了处理，提出了一种模糊时序数据挖掘的框架。
Moreover, fuzzy sets theory is adopted in the dissertation to deal with the uncertainty of the mining process and a new fuzzy frame of TSDM is given then.
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