说明：  目前流行的机械性能退化评估技术牵涉到在能识别所有故障特征迹象的 基础上对一台机器的当前状态进行评估， 这种方法必需搜集到（机器） 在不同状 态下的完整数据。 但是故障数据总是难以获得， 于是导致了这种技术很难被广泛 应用。 这篇论文介绍了 一个不需要故障历史数据的新颖方法。
(At present, the popular evaluation technology of mechanical performance degradation involves the identification of all fault features To evaluate the current state of a machine, this method must collect the information about the state of the machine Complete data in state. But fault data is always difficult to obtain, which makes this technology difficult to be widely used Application. This paper introduces a novel method without fault history data.)