Tokyo Electric Power Company Holdings, Inc.

Chikara Morooka

Hideharu Oniki

Hiroyuki Abe

Yuki Matsuoka

Noboru Kobayashi

Yuya Niidome

Yuuji Tagawa

Kazunari Kashima

Makoto Koide

Teppei Kishida

Takeya Nakajima

Tamotsu Ogawa

Hideharu Osoguchi

A method is used for selecting a boundary sample. The method includes acquiring a deterioration trend of a new device by performing a deterioration acceleration treatment to the new device, acquiring deterioration trends of a plurality of repaired devices which have been repaired after long-term use by performing a deterioration acceleration treatment to the plurality of repaired devices, calculating an upper limit of deterioration of the repaired device based on the deterioration trend of the new device, and selecting a boundary sample indicating a limit state in which the device can be reused as a standard of reuse of the device by specifying a repaired device having the largest deterioration among the repaired devices having a deterioration not larger than the upper limit.

Method for selecting boundary sample, apparatus for selecting boundary sample, storage medium, and system for selecting boundary sample

A method for measuring a deflection amount of a columnar structure includes the following steps. The method includes placing a longitudinal direction of a columnar structure in a direction parallel to a ground to place the columnar structure on a support member that supports the columnar structure such that the columnar structure is rotatable around an axis in the longitudinal direction; determining that the columnar structure placed has stopped rotating under its own weight around the axis; and measuring, after the stop of the rotation is determined, measuring a distance in a vertical direction between a straight line connecting both ends in the longitudinal direction of the columnar structure and a curved line along a shape in the longitudinal direction of the columnar structure.

Method for measuring deflection amount of columnar structure and method for determining performance of columnar structure

Growing community of inventors

Tokyo, Japan

Chikara Morooka