129,080 research outputs found
An investigation of the trading agent competition : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science in Computer Science at Massey University, Albany, New Zealand
The Internet has swept over the whole world. It is influencing almost every aspect of society. The blooming of electronic commerce on the back of the Internet further increases globalisation and free trade. However, the Internet will never reach its full potential as a new electronic media or marketplace unless agents are developed. The trading Agent Competition (TAC), which simulates online auctions, was designed to create a standard problem in the complex domain of electronic marketplaces and to inspire researchers from all over the world to develop distinctive software agents to a common exercise. In this thesis, a detailed study of intelligent software agents and a comprehensive investigation of the Trading Agent Competition will be presented. The design of the Risker Wise agent and a fuzzy logic system predicting the bid increase of the hotel auction in the TAC game will be discussed in detail
Spin-Orbit Misalignment of Merging Black-Hole Binaries with Tertiary Companions
We study the effect of external companion on the orbital and spin evolution
of merging black-hole (BH) binaries. An sufficiently close by and inclined
companion can excite Lidov-Kozai (LK) eccentricity oscillations in the binary,
thereby shortening its merger time. During such LK-enhanced orbital decay, the
spin axis of the BH generally exhibits chaotic evolution, leading to a wide
range (-) of final spin-orbit misalignment angle from an
initially aligned configuration. For systems that do not experience
eccentricity excitation, only modest () spin-orbit
misalignment can be produced, and we derive an analytic expression for the
final misalignment using the principle of adiabatic invariance. The spin-orbit
misalignment directly impacts the gravitational waveform, and can be used to
constrain the formation scenarios of BH binaries and dynamical influences of
external companions.Comment: Published in ApJ
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