翻訳と辞書 Words near each other ・ Primary shares ・ Primary socialisation ・ Primary source ・ Primary Spine Practitioner ・ Primary stage of socialism ・ Primary Stages ・ Primary Stages Einhorn School of Performing Arts (ESPA) ・ Primary standard ・ Primary State Highway 6 (Washington) ・ Primary station ・ Primary Structures (1966 exhibition) ・ Primary succession ・ Primary Suspect ・ Primary systemic amyloidosis ・ Primary ticket outlet ・ Primary time standard ・ Primary Times ・ Primary tone ・ Primary transcript ・ Primary triad ・ Primary tumor ・ Primary tumors of the heart ・ Primary Urban Area ・ Primary urethral groove ・ Primary ventricular fibrillation ・ Primary Wave Music ・ Primary-amine oxidase ・ Primary/secondary quality distinction ・ Primas Germaniae ・ Primase Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Primary time standard ： ウィキペディア英語版 Primary time standard In telecommunications, a primary time standard is a time standard that does not require calibration against another time standard. Examples of primary time, (''i.e.'', frequency standards) are caesium standards and hydrogen masers. The international second is based on the microwave frequency (9,192,631,770 Hz) associated with the atomic resonance of the hyperfine ground state levels of the caesium-133 atom in a magnetically neutral environment. Realizable caesium frequency standards use a strong electromagnet to deliberately introduce a magnetic field which overwhelms that of the Earth. The presence of this strong magnetic field introduces a slight, but known, increase in the atomic resonance frequency. However, very small variations in the calibration of the electric current in the electromagnet introduce minuscule frequency variations among different caesium oscillators. ==References== * 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Primary time standard」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.