TY - JOUR

T1 - The relationship between randomness and power-law distributed move lengths in random walk algorithms

AU - Sakiyama, Tomoko

AU - Gunji, Yukio Pegio

N1 - Funding Information:
The authors thank the Japan Society for the Promotion of Science for financial support ( B2130093 ).

PY - 2014/5/15

Y1 - 2014/5/15

N2 - Recently, we proposed a new random walk algorithm, termed the REV algorithm, in which the agent alters the directional rule that governs it using the most recent four random numbers. Here, we examined how a non-bounded number, i.e., "randomness" regarding move direction, was important for optimal searching and power-law distributed step lengths in rule change. We proposed two algorithms: the REV and REV-bounded algorithms. In the REV algorithm, one of the four random numbers used to change the rule is non-bounded. In contrast, all four random numbers in the REV-bounded algorithm are bounded. We showed that the REV algorithm exhibited more consistent power-law distributed step lengths and flexible searching behavior.

AB - Recently, we proposed a new random walk algorithm, termed the REV algorithm, in which the agent alters the directional rule that governs it using the most recent four random numbers. Here, we examined how a non-bounded number, i.e., "randomness" regarding move direction, was important for optimal searching and power-law distributed step lengths in rule change. We proposed two algorithms: the REV and REV-bounded algorithms. In the REV algorithm, one of the four random numbers used to change the rule is non-bounded. In contrast, all four random numbers in the REV-bounded algorithm are bounded. We showed that the REV algorithm exhibited more consistent power-law distributed step lengths and flexible searching behavior.

KW - Optimal strategy

KW - Power-law

KW - Random walk

KW - Randomness

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U2 - 10.1016/j.physa.2014.01.060

DO - 10.1016/j.physa.2014.01.060

M3 - Article

AN - SCOPUS:84894219877

VL - 402

SP - 76

EP - 83

JO - Physica A: Statistical Mechanics and its Applications

JF - Physica A: Statistical Mechanics and its Applications

SN - 0378-4371

ER -