Mitsubishi Electric Corporation

Ricoh Company, Ltd.

Yoshiaki Yokoyama

Hiroshi Kameda

Hiroshi Sakamaki

Yasushi Obata

Takafumi Nagano

Tetsutaro Yamada

Hisashi Takata

Yasuhiko Hosoe

Takahisa Yano

An observer measures a flow velocity of sea surface with beam, and a coastal wave height. A predictor predicts a next time state vector, from a state vector including flow velocity of each range cell of beam, a wave height difference between range cells, and a coastal wave height. First calculator calculates a prediction error covariance matrix from a smoothing error covariance matrix. Second calculator calculates a gain matrix using results obtained by the observer and the first calculator. Third calculator calculates a smoothing error covariance matrix using results by the observer, the second calculator, and the first calculator. The state vector is smoothed for each wave height difference, from results by the observer, the predictor, and the second calculator. The wave height of each range cell is calculated by adding the wave height and the wave height difference in toward-offshore direction, using the wave height difference smoothing.

State estimation device

A waveform estimation device includes: tracking filter processing unitsandthat execute tracking filter processing on observation values using tracking filters having different drive noises; and a filter output selection unitthat selects a regular waveform component predicted by the tracking filter processing unit, in an irregular section, and selects a regular waveform component predicted by the tracking filter processing unit, in a regular section. A residual processing unitcalculates a residual between observation values extracted by an observation value extraction unit, and a regular waveform component selected by the filter output selection unit. An irregular waveform detection unitdetermines whether the residual is an irregular waveform component.

Waveform estimation device and waveform estimation method

Resupply, recycling and exchange of consumption items of office apparatuses made by two or more manufacturers can be facilitated by a customer support center, a supply center, office systems and customer support terminals connected via a communication network, wherein an apparatus management database, a cost and supply information database, an analysis database, and a supply management database are installed at appropriate locations, each associated with functional units such as a data acquisition unit, a data analysis unit, a report generating unit and the like for issuing purchase orders, recycling orders, exchange orders and office system improvement proposals.

Customer support system, an office system, a customer support center, a supply center and a customer support method

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Tokyo, Japan

Yoshiaki Yokoyama