Abstract: The information processing device 1X mainly includes an acquisition means 16Xa and a transition sequence determination means 16Xb. The acquisition means 16Xa acquires a first combination between sellers and buyers conducting transactions and a second combination between the sellers and the buyers differing from the first combination. The transition sequence determination means 16Xb determines a transition sequence of combinations between the sellers and the buyers, the transition sequence being generated in a process of making a transition, per basic operation for changing the combinations between the sellers and the buyers, from the first combination to the second combination, each combination of the transition sequence making a profit of a mediator equal to or larger than a threshold value, the mediator mediating the transactions.

Abstract: A surface acoustic wave device includes a piezoelectric substrate and a pair of interdigital transducer electrodes. The pair of interdigital transducer electrodes include an alternating region as a region where the electrode fingers connected to one busbar and the electrode fingers connected to the other busbar are alternately provided. When a region on an end portion side of the alternating region and a region including distal end portions of the plurality of electrode fingers is referred to as an edge region, a propagation velocity of a surface acoustic wave in the edge region is slower than a propagation velocity of a surface acoustic wave in the alternating region. A propagation velocity of a surface acoustic wave in a busbar region as a region where the busbar is disposed is faster than the propagation velocity of the surface acoustic wave in the alternating region.

Abstract: A surface acoustic wave device includes a piezoelectric substrate and a pair of IDT electrodes. The pair of IDT electrodes includes a pair of busbars and multiple electrode fingers. The pair of busbars are formed on the piezoelectric substrate. The electrode fingers extend in a comb shape from each of the busbars toward the opposing busbar. The pair of IDT electrodes has an intersection region as a region where the electrode fingers connected to one busbar and the electrode fingers connected to another busbar are intersected when viewed along an arrangement direction of the electrode fingers. The electrode finger in a non-intersection region outside the intersection region has a thickness thinner than a thickness of the electrode finger in the intersection region.

Abstract: A surface acoustic wave device includes a piezoelectric material layer, a pair of busbars, a plurality of electrode fingers, and reflectors. The piezoelectric material layer has a thickness that is in a range of 1 to 2.5 times of an acoustic wavelength. A main mode of an elastic wave excited on the piezoelectric material layer by the electrode fingers is a leaky surface acoustic wave. A design variable is set such that a minimum propagation loss frequency where a propagation loss becomes minimum and a frequency of a plate wave spurious formed due to a slow shear wave excited together with the leaky surface acoustic wave are matched. A propagation velocity of a slowest bulk wave of an elastic wave that propagates in a lower layer of the piezoelectric material layer is equal to or more than 1.05 times of a velocity of the leaky surface acoustic wave.

Abstract: A surface acoustic wave device includes a piezoelectric material layer, a pair of busbars, a plurality of electrode fingers, and reflectors. The piezoelectric material layer has a thickness that is in a range of 1 to 2.5 times of an acoustic wavelength. A main mode of an elastic wave excited on the piezoelectric material layer by the electrode fingers is a leaky surface acoustic wave. A design variable is set such that a minimum propagation loss frequency where a propagation loss becomes minimum and a frequency of a plate wave spurious formed due to a slow shear wave excited together with the leaky surface acoustic wave are matched. A propagation velocity of a slowest bulk wave of an elastic wave that propagates in a lower layer of the piezoelectric material layer is equal to or more than 1.05 times of a velocity of the leaky surface acoustic wave.

Abstract: A surface acoustic wave device includes a piezoelectric substrate and a pair of interdigital transducer electrodes. The pair of interdigital transducer electrodes include an alternating region as a region where the electrode fingers connected to one busbar and the electrode fingers connected to the other busbar are alternately provided. When a region on an end portion side of the alternating region and a region including distal end portions of the plurality of electrode fingers is referred to as an edge region, a propagation velocity of a surface acoustic wave in the edge region is slower than a propagation velocity of a surface acoustic wave in the alternating region. A propagation velocity of a surface acoustic wave in a busbar region as a region where the busbar is disposed is faster than the propagation velocity of the surface acoustic wave in the alternating region.

Abstract: A brushless motor includes a stator 11 which forms a rotating magnetic field, a rotor 12 which is rotated by the rotating magnetic field, a motor case 13 to which the stator 11 is attached, a bracket 16 which is interposed between the motor case 13 and a gear box 15, and a resolver 21 which detects the rotational angle of the rotor 12. The brushless motor further includes a first bearing 14 and a second bearing 20, which rotatably support the rotor 12. The first bearing 14 and the second bearing 20 are disposed at mutually different positions in the direction along the axis A serving as a rotation center of the rotor 12. In the direction along the axis A, the second bearing 20 is disposed on an interior side of the gear box 15 with respect to the position at which the bracket 16 is attached to the gear box 15. Accordingly, the moment generated when the rotor 12 vibrates can be reduced.