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Showing 1 to 3 of 3 for “"Frequency square"”.
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Acoustic Method for Detection Large Pneumothoraxes in the Out-of-Hospital Environment
… to a known acoustic input in the form of a frequency sweep and a low frequency square wave and the output signal was recorded at multiple points on the phantom. Analysis of four characteristics of the output revealed no discernable correlation to the volume or location of a pneumothorax. …
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Row-column factorial designs and mutually orthogonal frequency rectangles
… t. We denote such a design by Iₖ (m,n,q,t). A frequency rectangle of type FR(m,n;q) is an m × n array based on a symbol set S of size q, such that each element of S appears exactly n/q times in each row and m/q times in each column. Two frequency rectangles of the same type are said to be …
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Three Dimensional Passive Integrated Electronic Ballast for Low Wattage HID Lamps
… applications. It is well-known that high-frequency electronic ballasts can greatly save energy, improve lamp performance, and reduce the ballast size and weight compared with the conventional magnetic ballast. However, a unique phenomenon called acoustic resonance could occur in HID lamps …