与大多数包装框架不同，Rails能通过查询数据库表发现对象模型的特征。
But unlike most wrapping frameworks, Rails can discover the features of the object model by querying the database table.
通过建立特征模型，引入成组技术，建立工艺数据库，系统的功能得以实现。
The function of this system fulfilled by establishing feature model, presenting group technology, founding process database.
模型与信号分析数据库连接后，可得到该特征频率处的故障参数信息。
When the model is connected with the analytic database of signal, the fault parameters corresponding with the characteristic frequency can be gained.
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