Study in the essay is carried out based on online performance monitoring for transient process of coal-fired power generating unit.

为此，本文围绕火电机组动态过程在线性能分析展开研究。

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And New Relic does have a sales force but the sales people take calls from customers who have tried the product online and are seeking advice on whether they can satisfy their need for performance monitoring with the free version or whether they need the premium one.

FORBES: New Relic Up-Ends Tradition