second-order difference

second-order difference

[′sek·ənd ¦ȯr·dər ′dif·rəns]
(mathematics)
One of the first-order differences of the sequence formed by taking the first-order differences of a given sequence.
References in periodicals archive ?
SCLR chooses the second-order difference matrix as the analysis operator to enforce the approximate piecewise linear structure, and it takes use of [l.
edf which is used in our experiments as the test data and take the second-order difference matrix as the cosparse operator.
Finally, substitution of (25), (26) into (24) gives the second-order difference equation
Testing for CI between the second-order difference variables (i.

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