公开(公告)号：EP0032943A4

公开(公告)日：1984-05-03

申请号：EP80901603

申请日：1981-02-24

Applicant: ANDERSON WESTON A ,  FISHER GERALD M

Inventor： ANDERSON WESTON A

IPC: G09B5/06 ,  G09B19/04 ,  G10L13/04

CPC classification number: G09B19/04 ,  G09B5/065 ,  G10L13/00

Abstract: An electronic teaching aid which enables a student viewing a visual display (2) containing text material (4) being read or studied to designate (10) any words or portion of said text for immediate audible vocalization or alternatively to designate any word of said text for immediate visual display of the definition of said designated word.

公开(公告)号：WO2009035883A3

公开(公告)日：2009-05-07

申请号：PCT/US2008075086

申请日：2008-09-03

Applicant: VARIAN INC ,  WONG WAI HA ,  WITHERS RICHARD STACY ,  ANDERSON WESTON A

Inventor： WONG WAI HA ,  WITHERS RICHARD STACY ,  ANDERSON WESTON A

IPC: G01V3/00 ,  G01R33/20

CPC classification number: G01R33/3657 ,  G01R33/035 ,  G01R33/34023 ,  G01R33/34053 ,  G01R33/34061 ,  G01R33/34092 ,  G01R33/341 ,  G01R33/3642 ,  G01R33/3671

Abstract: A multimode resonator resonating at two or more frequencies is operated at cryogenic temperatures and composed of a superconducting material or a normal metal with a superconducting section serving as a RF superconducting switch. The multimode resonator is coupled to a NMR spectrometer and a RF switch power source, wherein its one frequency is selected to correspond to the operating frequency of the NMR spectrometer and at least a second frequency is tuned to a frequency of RF switch power source, unrelated to the spectrometer frequency, therefore power at this frequency does not perturb the operation of the spectrometer. When activated, the RF switch power source induces a current sufficient to approach or exceeds the critical current in one or more sections of the superconducting material of the multimode resonator, thereby increasing its resistance and reducing the Q factor of the multimode resonator.

Abstract translation: 以两个或更多个频率谐振的多模谐振器在低温下工作，并由超导材料或具有用作RF超导开关的超导部分的普通金属组成。 多模谐振器耦合到NMR光谱仪和RF开关电源，其中其一个频率被选择为对应于NMR光谱仪的工作频率，并且至少第二频率被调谐到RF开关电源的频率，不相关 对于光谱仪频率，因此在该频率下的功率不会扰乱光谱仪的操作。 当激活时，RF开关电源在多模谐振器的超导材料的一个或多个部分中引起足以接近或超过临界电流的电流，从而增加其电阻并降低多模谐振器的Q因子。