Kron reduction power system

In power engineering, Kron reduction is a method used to reduce or eliminate the desired node without need of repeating the steps like in Gaussian elimination. It is named after American electrical engineer Gabriel Kron. . Kron reduction is a useful tool to eliminate unused nodes in a matrix. For example, three linear elements linked in series with a port at each end may be easily modeled as a 4X4 of. . • • . The concept behind Kron reduction is quite simple. Y-parameters are measured using nodes shorted to ground, but unused nodes, that is nodes without ports, are not necessarily grounded, and their state is not directly known to the outside. Therefore, the Y. [pdf]

Types of data storage devices

Should I Get a Desktop Drive, or a Portable One?If you have a large media-file collection—perhaps you are a photo or video editor, or maybe a movie buff—you'll likely need several terabytes of sp. . Which Drive Interface Should I Get?How an external drive connects to your PC or Mac is second only to the type of storage mechanism it uses in determining how fast you'll be able to. . Is a Rugged Hard Drive Worth It?If you carry your drive around frequently, you'll want to pay attention to how rugged the drive is. Some models include plastic bumpers, and some e. . So, What Is the Best External Hard Drive to Buy?Also know that you can find external drives that do way more than just store your data. Some include SD card readers to offload footage from a came. [pdf]
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