关于软件系统故障行为的统计假设，是软件可靠性模型的理论基础。
The statistical hypotheses about failure behavior of a software system are theoretical bases of software reliability models.
由在役抽油机故障的现场数据来判定其寿命统计模型，实现对抽油机使用可靠性的定量评定。
According to the failure site data of the well pumping unit in active service, its life statistical model is determined and the service reliability is evaluated quantitatively.
为了更好的对火电厂发电机组设备故障进行检测，运用多变量统计过程控制技术获得更为精确的机组设备参数模型。
For better detection to the thermal generating set equipment fault, using the multivariate statistical process control, a more precise equipment parameter model is obtained.
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