Abstract: A sheet conveying device includes a conveyor, a sound collector, and circuitry. The conveyor conveys a sheet. The conveyor conveys a sheet in a sheet conveyance direction. The sound collector collects an operating sound generated by a conveyance of the sheet. The circuitry is to extract a feature amount of the operating sound collected by the sound collector, and determine, at different positions in the sheet conveyance direction based on the feature amount, whether an abnormal conveyance of the sheet occurs until the sheet is conveyed to a given position in the sheet conveyance direction.

Abstract: An automatic document feeder includes a document stacker, a document conveyor, a sound generator, a sound collector, and circuitry. The document stacker is a receptacle on which a document is placed. The document conveyor conveys the document on the document stacker along a document conveyance path in a conveyance direction. The sound generator is on a surface of the document conveyance path, and has a protrusion or a recess protruding or recessed from the surface of the document conveyance path, and extending continuously or intermittently from one end to another end of the document conveyance path in a width direction orthogonal to the conveyance direction. The sound collector collects sound generated by contact between the sound generator and a fastening object attached to the document. The circuitry is to predict whether the fastening object is attached to the document, based on the sound collected by the sound collector.

Abstract: A sheet conveying device includes: a conveyor to convey a sheet in a conveyance direction; a sound collector to collect sound generated by a conveyance of the sheet by the conveyor, the sound collector movable in a sheet width direction orthogonal to the conveyance direction; and a circuitry configured to determine whether an abnormal conveyance occurs based on the sound collected by the sound collector.

Abstract: A sheet conveying device includes a conveyor, a sound collector, and circuitry. The conveyor conveys a sheet. The conveyor conveys a sheet in a sheet conveyance direction. The sound collector collects an operating sound generated by a conveyance of the sheet. The circuitry is to extract a feature amount of the operating sound collected by the sound collector, and determine, at different positions in the sheet conveyance direction based on the feature amount, whether an abnormal conveyance of the sheet occurs until the sheet is conveyed to a given position in the sheet conveyance direction.

Abstract: A sheet processing apparatus includes a sheet conveyor, a plurality of processing tools, and a tool moving device. The sheet conveyor is configured to convey a sheet. The plurality of processing tools is disposed in a conveyance direction of the sheet and is configured to perform processing to the sheet. The tool moving device is configured to move the plurality of processing tools in an intersecting direction intersecting the conveyance direction of the sheet.

Abstract: A combined plant is provided. The combined plant of continuously supplying hydrogen and nitrogen to an ammonia synthesis facility that continuously synthesizes ammonia from hydrogen and nitrogen, the combined plant including: a hydrogen production facility for acquiring solar energy and producing hydrogen by utilizing a part of the acquired solar energy; a nitrogen production facility for producing nitrogen from air and supplying the nitrogen to the ammonia synthesis facility; and a hydrogen storage facility for storing the hydrogen produced by the hydrogen production facility and supplying the produced hydrogen to the ammonia synthesis facility.

Abstract: Provided is a process for producing an aromatic carboxylic acid by oxidizing an aromatic compound having an alkyl group or a partially-oxidized alkyl group with a molecular-oxygen-containing gas in an aqueous medium, characterized in that a compound in which a transition metal is incorporated into a heteropoly-acid skeleton having a deficient structural moiety is used as a catalyst.In accordance with the present invention, the aromatic carboxylic acid can be produced efficiently at low costs.