摘要:
A communication device includes a radio frequency identification tag that performs a radio communication with a predetermined device. A first metal body has an electrical conductivity. A space adjustment unit is configured to adjust a space between the first metal body and the radio frequency identification tag. The first metal body is configured to be replaced with a second metal body, and when the first metal body is replaced with the second metal body, the space adjustment unit is configured to adjust a space between the second metal body and the radio frequency identification tag.
摘要:
A liquid surface level control method for an ion-exchange resin tower according to the present invention comprises steps of determining an operation signal (S18, S28, S38) of a discharge device of liquid (6) to be discharged from the ion-exchange resin tower (2a, 2b, 2c), based on a liquid surface level PID operation signal obtained by calculating a liquid surface level signal (S12) in a PID way and a supply flow rate signal (S10, S18, S28) supplied to the ion-exchange resin tower (2a, 2b, 2c), and moving the liquid surface level (6a) close to the target liquid surface level. Preferably, the interface level (4a) is detected by means of an interface level sensor (52), and the target liquid surface level is increased or decreased according to the increase/decrease of the interface level (4a). The interface level sensor (52) includes a plurality of light emitting parts and a plurality of light receiving parts which are opposite to each other in a one-to-one relation.
摘要:
An optical disk is disclosed. The optical disk includes a substrate having lands and pits arranged and formed along a recording track so that data are recorded; a reflective film deposited on the substrate; and a protective layer formed on the reflective film, where an edge of the pits in the array direction is irradiated with light from a side of the protective layer to deform the pits, so that pit data are rewritten and recorded, and the reflective film includes an alloy formed of AlFeX having Al as a main component, where X contains any one or more of Ti, Cu, Au, Pt, and Si.