胸腔内出血により発見された肺動静脈瘻破裂の1例

Article信州医学雑誌 26(4): 554-557(1978)journal articl

Noise suppression and stability in the overcurrent Limited mode of the switching power supply

The steady state and dynamic characteristics in the overcurrent limited mode of the dc-dc converter with energy storage reactor are analyzed theoretically and experimentally. It is revealed that foldback current limiting, constant current and voltage drooping characteristics are realized when the dc gain of the overcurrent limiting control circuit is larger than, equal to and less than unity, respectively, and that the stability in the overcurrent limited mode can be improved by employing a derivative compensator and smaller inductance of the energy storage reactor

THE MONITORING SYSTEM OF THE ROCK SLOPE BY LAYING OPTICAL STRAIN SENSOR IN THE PRINT OF V

光ファイバをひずみセンサとして利用して、岩盤斜面のモニタリングに適用するために室内基礎実験を行なうとともに、実岩盤への適用性について検討した。The optics fiber is usually used to the basic main lines of informatics transmission. In recently，it has been attracted special interest that the optics fiber can be used to the strain sensor lines applicable on the some characterizations of this fiber. In this study the focus was on the strain measurement technology of optical fibers. It was conducted fundamental research for applying optical fibers to rock slope strain measurement. On the basis of theresult，the optical strain sensor was laid in the print of V in natural fracture rock slope. And the movement of a natural slope was measured by laid fibers on the slope.「第11回岩の力学国内シンポジウム」　日時：平成14年1月24～25日　場所：(財)海外職業訓練協会（千葉県幕張