Encyclopedia : A : AP : APX (3 articles)

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APX
For the architects' fraternity, see Alpha Rho Chi. APX may also refer to the Australia Pacific Exchange or Amsterdam Power Exchange. In complexity theory the class APX (an abbreviation of "approximable") is the set of NP optimization problems that allow polynomial-time approximation algorithms wit..
APXS
An Alpha Particle X-Ray Spectrometer (APXS) or Alpha Proton X-Ray Spectrometer (APXS) for the Pathfinder mission, is a device that analyses the elements of a sample from the scatered Alpha particles and the emitted Protons (for Pathfinder) and X-Rays afer the sample is iridated with alpha particle a..

 

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