A solution search system, which can search for a test object, expected to output an optimal result, from at least two test objects each outputting a result based on a probability distribution, includes: a record superiority comparing unit which can obtain past records of the test objects based on an accumulation of the output results and can compare all records for superiority/inferiority; a controlling unit which can control a measurement variable of the test objects, based on the compared superiority/inferiority records, and a latest result output from the test object; and an output instructing unit which can instruct the test object, the measurement variable of which has exceeded a threshold value, to output a result, wherein the output instructing unit determines, as a desired solution, at least one test object to which the largest number of the output instructions have finally been given after repetition of the output instructions.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A solution search system configured to search for a test object expected to output an optimal result, among at least two test objects each of which outputs a result based on a probability distribution, the solution search system comprising: a record superiority comparing unit configured to obtain a past record for each of the test objects, based on an accumulation of the results having been output, and to compare the records of the test objects in terms of superiority and inferiority in relation to the records of all the test objects; a controlling unit configured to perform a control to increase or decrease a measurement variable for each of the test objects, based on the superiority/inferiority of the record having been compared by the record superiority comparing unit, and a latest result having been output from the test object; and an output instructing unit configured to instruct the test object, the measurement variable of which has exceeded a threshold value, to output a result, wherein the output instructing unit determines, as a desired solution, at least one test object to which the largest number of the output instructions have finally been given after repetition of the output instructions. 2. The solution search system according to claim 1, the solution search system being further configured to search for a combination of test objects which is expected to output an optimal result, among at least three test objects each of which outputs a result based on a predetermined probability distribution, wherein the output instructing unit determines, as a desired solution, a combination of test objects to which the largest number of the output instructions have been given after repetition of the output instructions. 3. The solution search system according to claim 1, the solution search system being further configured to search for a combination of test objects, each of the test objects having a probability distribution which varies chronologically in response to an output instruction from the output instructing unit, and when searching for the solution, at least two solution-search systems are used. 4. The solution search system according to claim 1, wherein: the record superiority comparing unit raises the past record of one test object to a superior level, when the test object has output a superior result, while the other test objects have output inferior results, and the record superiority comparing unit lowers the past record of one test object to an inferior level, when the test object has output an inferior result, while the other test objects have output superior results. 5. The solution search system according to claim 1, wherein: in the record superiority comparing unit, an internal resource value is a difference between the record of one test object and the mean of the records of all the test objects, and the controlling part: increases the measurement variable, when the internal resource value is positive, and the latest result having been output from the test object is superior; maintains the measurement variable, when the internal resource value is positive, and the latest result having been output from the test object is inferior; increases the measurement variable, when the internal resource value is zero, and the latest result having been output from the test object is superior; decreases the measurement variable, when the internal resource value is zero, and the latest result having been output from the test object is inferior; maintains the measurement variable, when the internal resource value is negative, and the latest result having been output from the test object is superior; and decreases the measurement variable, when the internal resource value is negative, and the latest result having been output from the test object is inferior. 6. The solution search system according to claim 1, wherein the controlling unit performs a control so that the sum of the measurement variables which are assigned to the respective test objects can be kept constant. 7. A solution search program configured to search for a test object expected to output an optimal result, among at least two test objects each of which outputs a result based on a probability distribution, the solution search program comprising the steps of: record superiority comparing, in which a past record is obtained for each of the test objects, based on an accumulation of the results having been output, and the records of the test objects are compared in terms of superiority and inferiority in relation to the records of all the test objects; controlling, in which a control is performed to increase or decrease a measurement variable for each of the test objects, based on the superiority/inferiority of the record having been compared by the record superiority comparing unit, and a latest result having been output from the test object; and output instructing, in which the test object, the measurement variable of which has exceeded a threshold value, is instructed to output a result, wherein in the output instructing step, a computer is caused to determine, as a desired solution, at least one test object to which the largest number of the output instructions have finally been given after repetition of the output instructions. 8. The solution search program according to claim 7, wherein in the record superiority comparing step, the past record of one test object is raised to a superior level, when the test object has output a superior result, while the other test objects have output inferior results, and the past record of one test object is lowered to an inferior level, when the test object has output an inferior result, while the other test objects have output superior results. 9. The solution search program according to claim 7, wherein: in the record superiority comparing step, an internal resource value is a difference between the record of one test object and the mean of the records of all the test objects, and in the step of controlling: the measurement variable is increased, when the internal resource value is positive, and the latest result having been output from the test object is superior; the measurement variable is maintained, when the internal resource value is positive, and the latest result having been output from the test object is inferior; the measurement variable is increased, when the internal resource value is zero, and the latest result having been output from the test object is superior; the measurement variable is decreased, when the internal resource value is zero, and the latest result having been output from the test object is inferior; the measurement variable is maintained, when the internal resource value is negative, and the latest result having been output from the test object is superior; and the measurement variable is decreased, when the internal resource value is negative, and the latest result having been output from the test object is inferior. 10. The solution search program according to claim 7, wherein in the step of controlling, a control is performed so that the sum of the measurement variables which are assigned to the respective test objects can be kept constant. 11. A solution search method for searching for a test object expected to output an optimal result, among at least two test objects each of which outputs a result based on a probability distribution, the solution search method comprising the steps of: record superiority comparing, in which a past record is obtained for each of the test objects, based on an accumulation of the results having been output, and the records of the test objects are compared in terms of superiority and inferiority in relation to the records of all the test objects; controlling, in which a control is performed to increase or decrease a measurement variable for each of the test objects, based on the superiority/inferiority of the record having been compared by the record superiority comparing unit, and a latest result having been output from the test object; and output instructing, in which the test object, the measurement variable of which has exceeded a threshold value, is instructed to output a result, wherein in the step of output instructing, at least one test object to which the largest number of the output instructions have finally been given after repetition of the output instructions of the result is determined as a desired solution. 12. The solution search method according to claim 11, wherein in the step of record superiority comparing, the past record of one test object is raised to a superior level, when the test object has output a superior result, while the other test objects have output inferior results, and the past record of one test object is lowered to an inferior level, when the test object has output an inferior result, while the other test objects have output superior results. 13. The solution search method according to claim 11, wherein: in the step of record comparing, an internal resource value is a difference between the record of one test object and the mean of the records of all the test objects, and in the step of controlling: the measurement variable is increased, when the internal resource value is positive, and the latest result having been output from the test object is superior; the measurement variable is maintained, when the internal resource value is positive, and the latest result having been output from the test object is inferior; the measurement variable is increased, when the internal resource value is zero, and the latest result having been output from the test object is superior; the measurement variable is decreased, when the internal resource value is zero, and the latest result having been output from the test object is inferior; the measurement variable is maintained, when the internal resource value is negative, and the latest result having been output from the test object is superior; and the measurement variable is decreased, when the internal resource value is negative, and the latest result having been output from the test object is inferior. 14. The solution search method according to claim 11, wherein in the step of controlling, a control is performed so that the sum of the measurement variables which are assigned to the respective test objects can be kept constant.