This article concludes a two-part series on analog velocity loops. It addresses lead-lag velocity control, building on last month’s discussion on proportional-integral (PI) control loops This article ...

Part I of this series introduced the lead/lag control strategy as it applies to parallel pump operation and discussed the need for identifying the designer’s intent for a particular system. Part II ...

I want to design a query to compute some returns for stock data and in searching the 'SQL Server Books Online' I find a very small and not so helpful at all help section on the lead and lag functions.