Abstract: A vibration-driven energy harvesting device includes a vibration-driven energy harvesting element that generates power according to vibrations of an electrode; an output unit that, when connected to a load resistor, extracts power generated by the vibration-driven energy harvesting element; a judgment unit that judges whether or not a power value of the power is greater than a predetermined threshold value; a determination unit that determines an input impedance of the output unit based on a judgment result obtained by the judgment unit; and an adjustment unit that adjusts the input impedance of the output unit according to a determination made by the determination unit.

Abstract: A solution-searching system encompasses an output adjustment unit having N signal adjustment circuits for converting provisional output-adjustment signals into final output-adjustment signals, 2N data generation units for generating binary data, 2N data conversion units which convert the binary data into information, a fluctuation setting unit for suppling bias probabilities to the signal adjustment circuits, fluctuation probabilities to the data generation units, and threshold values to the data conversion units, setting occurrence-frequencies of the binary data for making an occurrence-frequency of a specific variable, and a feedback control unit for determining whether an optimal solution has been found based on the information converted by the data conversion units and search-problem information preliminarily entered, by repeating transmission of the final output-adjustment signals to the output adjustment units, if the optimal solution has not been found.

Abstract: A solution search device includes a variable value calculation circuit provided for each variable in a conjunctive-normal-form logical expression of an instance of the Boolean Satisfiability problem (SAT) and calculates a value of the variable; and a notification path that notifies another variable value calculation circuit of the value, in which each of the variable value calculation circuit includes a positive-side variable value calculation circuit that calculates a value of a target variable making all clauses including a target variable having no negation among clauses of the logical expression be true, a negative-side variable value calculation circuit that calculates the value of the target variable making all clauses including a target variable having negation among clauses of the logical expression be true, and a current value calculation circuit that calculates the value of the target variable based on the value of the target variable calculated by the positive- side variable value calculation circu

Abstract: A solution search device includes a variable value calculation circuit that is provided for each variable included in a conjunctive-normal-form logical expression of an instance of the Boolean Satisfiability problem (SAT) and calculates a value of the variable; and a notification path that notifies another variable value calculation circuit of the value of the variable calculated by the variable value calculation circuit, in which each of the variable value calculation circuits includes a positive-side variable value calculation circuit that calculates a value of a target variable in a case where a value of another variable calculated by another variable value calculation circuit is input to the logical expression, the target variable being the variable whose value is calculated by the variable value calculation circuit, the value calculated by the positive-side variable value calculation circuit making all clauses including a target variable having no negation among clauses of the logical expression be true,

Abstract: 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.

Abstract: There are provided a quantum dot, a plurality of quantum dots having a larger volume than the quantum dot, a light detection unit for detecting a light emission state of an output light from the plurality of quantum dots, and a light supply unit capable of supplying a control light to the plurality of quantum dots thereby to excite other exciters to a lower level, and controlling energy discharging of the exciters transiting to the lower level, wherein the control light to be supplied by the light supply unit is controlled per quantum dot based on the light emission state of the output light per quantum dot and previously-input search problem information.

Abstract: 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.