Abstract: A tire state estimation system (10) is provided with a crack shape acquisition unit (240) for acquiring the shape of a crack on the outer surface of a tire, a crack information DB (230) for holding a correspondence relationship in which at least either degree of opening or deviation width of the crack based on the shape of the crack is associated with the depth of the crack, and a crack depth estimation unit (250) for estimating the depth of the crack based on the acquired crack shape and the correspondence relationship.

Abstract: An earphone includes an inserter configured to be inserted into an outer ear hole of an ear, a main body configured to be coupled to the inserter, and an earpiece covering the inserter. The main body includes a bottom surface and a side surface that are configured to contact a surface of a cavum concha. The side surface has a first region configured to contact a side wall of an antihelix. The first region has a protrusion configured to contact an inner side of the antihelix.

Abstract: In an IPM rotor, a first core sheet has a first sheet hole forming a part of an accommodation hole. The first sheet hole has an edge portion having a flat spring portion which is bent by a magnet through insertion of the magnet into the accommodation hole. A pair of recesses forming a clearance with respect to the magnet are formed at both side portions of the flat spring portion of the edge portion of the first sheet hole. A size of the clearance is set based on a relationship between a magnitude of a pressing force of the flat spring portion on the magnet and variation in pressing force.

Abstract: An opposed-piston engine includes: a cylinder; a one-side piston disposed inside the cylinder on one side in an axial direction; and an other-side piston disposed inside the cylinder on another side in the axial direction. Atop surface of the one-side piston has a one-side cavity recessed in a central portion. A top surface of the other-side piston has an other-side cavity recessed in a central portion. An outer peripheral edge of the one-side cavity is at least 0.1D1 away from an outer peripheral edge of the top surface of the one-side piston over the entire circumference, where D1 is a diameter of the top surface of the one-side piston. An outer peripheral edge of the other-side cavity is at least 0.1D2 away from an outer peripheral edge of the top surface of the other-side piston over the entire circumference, where D2 is a diameter of the top surface of the other-side piston.

Abstract: An opposed-piston engine according to an embodiment is a first fuel injection device configured to inject fuel from a circumferential wall surface of at least one cylinder into the cylinder, and a second fuel injection device disposed to be displaced in a circumferential direction so as to be opposite to the first fuel injection device across an axial center of the cylinder. Each of the first fuel injection device and the second fuel injection device includes a plurality of injection holes having different injection directions, in a cross-section orthogonal to the axial direction. A direction directed by a first downstream injection hole is configured to pass through a second injection region, and a direction directed by a second downstream injection hole is configured to pass through a first injection region.

Abstract: An ammonia engine includes: an engine body which includes a first cylinder and a second cylinder; an air supply unit which supplies air to each of the first cylinder and the second cylinder; an ammonia supply unit which supplies ammonia to each of the first cylinder and the second cylinder; an ammonia amount adjustment unit which adjusts an ammonia supply amount to the second cylinder by the ammonia supply unit to be larger than an ammonia supply amount to the first cylinder; and an exhaust gas supply unit which supplies an exhaust gas generated by the second cylinder to the first cylinder.

Abstract: An opposed-piston engine according to an embodiment is a first fuel injection device configured to inject fuel from a circumferential wall surface of at least one cylinder into the cylinder, and a second fuel injection device disposed to be displaced in a circumferential direction so as to be opposite to the first fuel injection device across an axial center of the cylinder. Each of the first fuel injection device and the second fuel injection device includes a plurality of injection holes having different injection directions, in a cross-section orthogonal to the axial direction. A direction directed by a first downstream injection hole is configured to pass through a second injection region, and a direction directed by a second downstream injection hole is configured to pass through a first injection region.

Abstract: An engine according to an embodiment includes at least one cylinder, at least one piston disposed in the at least one cylinder, a plurality of fuel injection valves disposed on the at least one cylinder, the plurality of fuel injection valves including a first fuel injection valve having a predetermined total hole area and a second fuel injection valve having a total hole area smaller than the total hole area of the first fuel injection valve, and a control device for controlling the first fuel injection valve and the second fuel injection valve according to a load of the engine.

Abstract: A neural-network quantization method includes retrieving, from a reference layer, statistical information on layer parameters related to the reference layer. The layer parameters include features of the reference layer. The neural-network quantization method includes determining, based on the statistical information, a quantization range for the layer parameters related to a quantization target layer. The neural-network quantization method quantizes selected layer parameters in the layer parameters related to the quantization target layer. The selected layer parameters are within the quantization range.

Abstract: In a data processing apparatus, an M×M data processing unit performs M×M convolution processing using data from an input buffer unit. An N×N data processing unit performs N×N convolution processing using the data from the input buffer unit. A first output buffer unit stores one of results of processing by the M×M data processing unit and the N×N data processing unit, and outputs the same to the input buffer unit. A second output buffer unit stores the other of the results of processing by the M×M data processing unit and the N×N data processing unit. The second output buffer unit transfers the result of processing to the external memory.

Abstract: According to an embodiment, a multiplier accumulator includes a controller, a high-order multiplier, a high-order accumulator, a low-order multiplier, and an output unit. The controller is configured to designate each digit within a range of the most significant digit in a coefficient for an input value to a stop digit as a target digit. The high-order multiplier is configured to calculate a high-order multiplication value by multiplying the input value, and a value and a weight of the target digit. The high-order accumulator is configured to calculate a high-order accumulation value by accumulatively adding the high-order multiplication values for input values. The low-order multiplier is configured to calculate a low-order multiplication value by multiplying an input value and a value of a digit smaller than the stop digit. The output unit is configured to output a value determined based on whether the high-order accumulation value exceeds a boundary value.

Abstract: An authentication server according to embodiments performs statistical processing on a plurality of pieces of ID data acquired from an electronic device including a PUF circuit generating the pieces of ID data (S1052 to S1071), determines whether the plurality of pieces of ID data are physical random numbers based on a result of the statistical processing (S1072), and when the plurality of pieces of ID data are determined to be physical random numbers, recognizes the result of authentication of the electronic device as a success of authentication (S1073), and when the plurality of pieces of ID data are determined not to be physical random numbers, recognizes a result of authentication of the electronic device as a failure of authentication (S1074).

Abstract: According to an emboediment, a multiplier accumurator includes a controller, a high-order multiplier, a high-order accumulator, a low-order multiplier, and an output unit. The controller is configured to designate each digit within a range of the most significant digit in a coefficient for an input value to a stop digit as a target digit. The high-order multiplier is configured to calculate a high-order multiplication value by multiplying the input value, and a value and a weight of the target digit. The high-order accumulator is configured to calculate a high-order accumulation value by accumulatively adding the high-order multiplication values for input values. The low-order multiplier is configured to calculate a low-order multiplication value by multiplying an input value and a value of a digit smaller than the stop digit. The output unit is configured to output a value determined based on whether the high-order accumulation value exceeds a boundary value.

Abstract: An authentication server according to embodiments performs statistical processing on a plurality of pieces of ID data acquired from an electronic device including a PUF circuit generating the pieces of ID data (S1052 to S1071), determines whether the plurality of pieces of ID data are physical random numbers based on a result of the statistical processing (S1072), and when the plurality of pieces of ID data are determined to be physical random numbers, recognizes the result of authentication of the electronic device as a success of authentication (S1073), and when the plurality of pieces of ID data are determined not to be physical random numbers, recognizes a result of authentication of the electronic device as a failure of authentication (S1074).

Abstract: A torsion beam type suspension device is provided in which a trailing arm part and a torsion beam part are formed as a unit by press-forming a tailored blank material in which end parts of plate materials having different thicknesses are butt-welded via a weld part. A weld part of the tailored blank material comprises a U-shaped cross section in which front and rear side wall portions are connected via a bottom wall portion, and a pair of cutouts are formed at the edge of each of the side wall portions at positions sandwiching the weld part, and therefore, when the torsion beam part is twistedly deformed, shifting the concentration of stress from the weld part to the cutout enables peeling apart of the weld end part to be prevented and the durability of the torsion beam type suspension device to be enhanced.

Abstract: A torsion beam type suspension device is provided in which a trailing arm part and a torsion beam part are formed as a unit by press-forming a tailored blank material in which end parts of plate materials having different thicknesses are butt-welded via a weld part. A weld part of the tailored blank material comprises a U-shaped cross section in which front and rear side wall portions are connected via a bottom wall portion, and a pair of cutouts are formed at the edge of each of the side wall portions at positions sandwiching the weld part, and therefore, when the torsion beam part is twistedly deformed, shifting the concentration of stress from the weld part to the cutout enables peeling apart of the weld end part to be prevented and the durability of the torsion beam type suspension device to be enhanced.

Abstract: A photovoltaic device that exhibits improved light absorption properties for the electric power generation layer and a process for producing such a photovoltaic device are provided by optimizing the surface shape of the back surface structure. A photovoltaic device 100 comprising a first transparent electrode layer 2, an electric power generation layer 3, a second transparent electrode layer 6 and a back electrode layer 4 provided sequentially on a substrate 1, wherein the back electrode layer 4 comprises a thin film of silver, and the surface of the second transparent electrode layer 6 on the surface of the back electrode layer 4 has a fine uneven texture, for which the surface area magnification ratio relative to the projected surface area is not less than 10% and not more than 32%.

Abstract: The short-circuit current of a photovoltaic device is improved by optimizing the transparent conductive layer. A photovoltaic device comprising a first transparent electrode layer, an electric power generation layer, a second transparent electrode layer and a back electrode layer on a substrate, wherein the film thickness of the second transparent electrode layer is not less than 80 nm and not more than 100 nm, and the light absorptance for the second transparent electrode layer in a wavelength region from not less than 600 nm to not more than 1,000 nm is not more than 1.5%. Also, a photovoltaic device wherein the film thickness of the second transparent electrode layer is not less than 80 nm and not more than 100 nm, and the reflectance for light reflected at the second transparent electrode layer and the back electrode layer is not less than 91% in the wavelength region from not less than 600 nm to not more than 1,000 nm.

Abstract: Attenuation compensation volume computing means (60, 61, 62, 63, 67, 68, 69, 70) of a signal receiver computes attenuation compensation volume of a video signal (GL, GH) on the basis of attenuation of pulses which are arranged in a digital sound signal LRD from the signal transmitter, and video signal attenuation compensation means (60, 61) of the signal receiver compensates the attenuation of the video signal (RAT, GAT, BAT) on the basis of the computed attenuation compensation volume (GL, GH), thereby stably compensating the attenuation of the video signal irrespective of kinds of displays or resolution of an image, and outputting good sounds to a video output machine as well as good videos.

Abstract: Synchronous signal overlapping and outputting means and sound signal transmitting means of a signal transmitter transmit any color signal which synchronous signals overlapped and the other color signals, and a sound signal on which polarity information of the synchronous signals was added through four signal lines to a signal receiver, respectively. Synchronous signal recovering and outputting means of the signal receiver recovers the synchronous signals on the basis of the synchronous signals separated from the color signal with the polarity information and outputs the signals to an image output unit. Then, it is possible to output sounds together with images inputted from the image inputting source from the image outputting unit with only four signal lines.