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This threshold is determined by minimizing intra-class intensity variance, or equivalently, by maximizing inter-class variance. [2] Otsu's method is a one-dimensional discrete analogue of Fisher's discriminant analysis , is related to Jenks optimization method , and is equivalent to a globally optimal k-means [ 3 ] performed on the intensity ...
For example, the size distribution (number of clusters of size s) drops off as a power-law for large s at the threshold, n s (p c) ~ s −τ, where τ is a dimension-dependent percolation critical exponents. For an infinite system, the critical threshold corresponds to the first point (as p increases) where the size of the clusters become infinite.
The original IBM PC (c. 1981) had a clock rate of 4.77 MHz (4,772,727 cycles per second). In 1992, both Hewlett-Packard and Digital Equipment Corporation (DEC) exceeded 100 MHz with RISC techniques in the PA-7100 and AXP 21064 DEC Alpha respectively.
In electrophysiology, the threshold potential is the critical level to which a membrane potential must be depolarized to initiate an action potential.
Threshold, the first volume of the collected short fiction of Roger Zelazny; Threshold, a comic book published by DC Comics; Threshold, a science-fiction novel by Caitlín R. Kiernan; Threshold, a Christian novel by Bill Myers (author) Threshold, a science-fiction novel by Ben Mezrich; Threshold Editions, a conservative imprint
A wireless ad hoc network [1] (WANET) or mobile ad hoc network (MANET) is a decentralized type of wireless network.The network is ad hoc because it does not rely on a pre-existing infrastructure, such as routers or wireless access points.
Threshold limit value − time-weighted average (TLV-TWA): The average exposure on the basis of a 8 hours per day, 40 hours per week work schedule. Threshold limit value − short-term exposure limit (TLV-STEL): A 15-minute TWA exposure that should not be exceeded at any time during a workday, even if the 8-hour TWA is within the TLV-TWA.
The threshold displacement energy is also often used in binary collision approximation computer codes such as SRIM [22] to estimate damage. However, the same caveats as for the Kinchin-Pease equation also apply for these codes (unless they are extended with a damage recombination model).