Tapering – מילון אנגלי-אנגלי
tapering
adj.
gradually decreasing in width or thickness
taper
v.
gradually decrease in width or thickness at one end; diminish gradually; make thinner at one end; cause to diminish gradually
Tapering
In the context of
sports,
tapering refers to the practice of reducing exercise in the days just before an important competition. Tapering is customary in many endurance sports, such as
long-distance running and
swimming. For many
athletes, a significant period of tapering is essential for optimal performance. The tapering period frequently lasts as much as a week or more.
tapering
Noun
1. the act of gradually lowering the size or amount; "the doctor prescribed the tapering of the dose"
(hypernym) lowering
(derivation) taper
Adjective
1. gradually narrowed toward a point; "a tall tapering spire"
(synonym) tapered
(similar) pointed
2. becoming gradually narrower; "long tapering fingers"; "trousers with tapered legs"
(synonym) tapered, narrowing
(similar) narrow
3. gradually decreasing until little remains
(synonym) dwindling, tapering off
(similar) decreasing
taper
Noun
1. a convex shape that narrows toward a point
(hypernym) convex shape, convexity
(derivation) sharpen, point
2. the property possessed by a shape that narrows toward a point (as a wedge or cone)
(hypernym) narrowing
(hyponym) point, pointedness
(derivation) sharpen, point
3. a loosely woven cord (in a candle or oil lamp) that draws fuel by capillary action up into the flame
(synonym) wick
(hypernym) cord
(hyponym) candlewick
(part-holonym) oil lamp, kerosene lamp, kerosine lamp
4. stick of wax with a wick in the middle
(synonym) candle, wax light
(hypernym) lamp
(hyponym) chandlery
(part-meronym) candlewick
Verb
1. diminish gradually; "Interested tapered off"
(hypernym) decrease, diminish, lessen, fall
(derivation) tapering
2. give a point to; "The candles are tapered"
(synonym) sharpen, point
(hypernym) change shape, change form, deform
(hyponym) acuminate
(see-also) taper off
Tapering
(p. pr. & vb. n.)
of Taper
(a.)
Becoming gradually smaller toward one end.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter.
About
Tapering
The so-called process of
split-cosine-bell tapering in
Time Series is a recommended transformation of the series prior to the spectrum analysis. It usually leads to a reduction of leakage in the periodogram. The rational for this transformation is explained in detail in Bloomfield (1976, p. 80-94). In essence, a proportion (p) of the data at the beginning and at the end of the series is transformed via multiplication by the weights:
w
t = 0.5*{1-cos[
*(t - 0.5)/m]} (for t=0 to m-1)
w
t = 0.5*{1-cos[
*(N - t + 0.5)/m]} (for t=N-m to N-1)
where m is chosen so that 2*m/N is equal to the proportion of data to be tapered (p).
