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The zero-crossing rate (ZCR) is the rate at which a signal changes from positive to zero to negative or from negative to zero to positive. [1] Its value has been widely used in both speech recognition and music information retrieval, being a key feature to classify percussive sounds. [2] ZCR is defined formally as
A negative frequency causes the sin function (violet) to lead the cos (red) by 1/4 cycle. The ambiguity is resolved when the cosine and sine operators can be observed simultaneously, because cos(ωt + θ) leads sin(ωt + θ) by 1 ⁄ 4 cycle (i.e. π ⁄ 2 radians) when ω > 0, and lags by 1 ⁄ 4 cycle when ω < 0.
Microsoft Office Excel – for MS Windows and Apple Macintosh. The proprietary spreadsheet leader. Microsoft Works Spreadsheet – for MS Windows (previously MS-DOS and Apple Macintosh). Only allows one sheet at a time. PlanMaker – for MS Windows, Linux, MS Windows Mobile and CE; part of SoftMaker Office
The achievement of, a generally positive feat, three times in a game, or another achievement based on the number three [6] Several: 3+ Three or more but not many. Small gross: 120 Ten dozen (10x12) [7] Great hundred: 120 Ten dozen (10x12) or six score (6x20), also known as long-hundred or twelfty [8] [9] None: 0 Zero Lakh: 100,000
When playing an audio file on a portable media player, such as an iPod, the screen display may show the time remaining as a negative number, which increases up to zero time remaining at the same rate as the time already played increases from zero. Television game shows: Participants on QI often finish with a negative points score.
Different texts (and even different parts of this article) adopt slightly different definitions for the negative binomial distribution. They can be distinguished by whether the support starts at k = 0 or at k = r, whether p denotes the probability of a success or of a failure, and whether r represents success or failure, [1] so identifying the specific parametrization used is crucial in any ...
Zero-inflated models are commonly used in the analysis of count data, such as the number of visits a patient makes to the emergency room in one year, or the number of fish caught in one day in one lake. [1] Count data can take values of 0, 1, 2, … (non-negative integer values). [2]
Complementarily, the false negative rate (FNR) is the proportion of positives which yield negative test outcomes with the test, i.e., the conditional probability of a negative test result given that the condition being looked for is present. In statistical hypothesis testing, this fraction is given the letter β.