Optimal Combination of Exploration Techniques Based on the Information-cost Function.

Generally information-cost functions of exploration techniques having low unit cost are low in limit information, while those having high unit cost are high in limit information. Consequently, information-cost functions of many techniques intersect each other.The most optimal combination of a low unit cost technique and a high unit cost one is realized by changing from the former to the latter when the information at which the difference of costs between both techniques are largest is obtained.If we use information-unit cost functions which are derivatives of information-cost functions, the optimal combination is represented as the trace where functions having the lowest unit cost at given information among all the functions are chained.