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    • 2. 发明申请
    • SYSTEM AND METHOD FOR CHARACTERIZING A SAMPLE BY LOW-FREQUENCY SPECTRA
    • 通过低频特征表征样品的系统和方法
    • WO2003083439A2
    • 2003-10-09
    • PCT/US2003/009544
    • 2003-03-28
    • WAVBANK, INC.BUTTERS, John, T.BUTTERS, Bennett, M.BUTTERS, Lisa, C.
    • BUTTERS, John, T.BUTTERS, Bennett, M.BUTTERS, Lisa, C.
    • G01N
    • G01N37/005
    • A method and apparatus for interrogating a sample that exhibits molecular rotation are disclosed. In practicing the method, the sample is placed in a container having both magnetic and electromagnetic shielding, and Gaussian noise is injected into the sample. An electromagnetic time-domain signal composed of sample source radiation superimposed on the injected Guassian noise is detected, and this signal is cross-correlated with a second time-domain signal produced by the same or similar sample, to produce a cross-correlated signal with frequency domain components. The latter is plotted in the frequency domain by a fast Fourier transform to produce a frequency domain spectrum in a frequency range within DC to 50KHz. From this spectrum, one or more low­ frequency signal components that are characteristic of the sample being interrogated are identified.
    • 公开了一种询问显示分子旋转的样品的方法和装置。 在实施该方法时,将样品置于具有磁屏蔽和电磁屏蔽的容器中,并将高斯噪声注入样品。 检测由叠加在注入的Guassian噪声上的样本源辐射组成的电磁时域信号,并且该信号与由相同或相似样本产生的第二时域信号交叉相关,以产生与 频域组件。 后者通过快速傅立叶变换在频域中绘制,以在DC至50KHz的频率范围内产生频域频谱。 从该频谱中,识别被询问的样本的特征的一个或多个低频信号分量。
    • 9. 发明申请
    • SYSTEM AND METHOD FOR SAMPLE DETECTION BASED ON LOW-FREQUENCY SPECTRAL COMPONENTS
    • 基于低频光谱分量的样本检测系统和方法
    • WO2003102566A2
    • 2003-12-11
    • PCT/US2003/011834
    • 2003-04-18
    • WAVBANK, INCBUTTERS, John, T.BUTTERS, Bennett, M.BUTTERS, Lisa, C.
    • BUTTERS, John, T.BUTTERS, Bennett, M.BUTTERS, Lisa, C.
    • G01N27/00
    • G01N37/005H01Q1/22H01Q7/08
    • Method and apparatus for detecting a selected material in a sample are disclosed. In the method, the sample (842) is placed adjacent a detector coil (846), for generating an electromagnetic time-domain signal composed of sample source radiation. The signal is first conditioned to convert the signal to an amplified conditioned signal from which frequency components above a selected frequency have been removed, then filtered to selectively pass low-frequency spectral components that are (i) in a frequency range between dc and 50KHz, and (ii) characteristic of the selected material. The filtered signal is cross-correlated with a data set of low-frequency spectral components that are (i) in a frequency range between dc and 50KHz, and (ii) characteristic of a selected material, to produce a frequency-domain spectrum in the frequency range within DC to 50KHz. This spectrum is then used to determine whether the frequency-domain spectrum contains one or more low-frequency signal components that are characteristic of the selected material, and diagnostic of the presence or absence of such material in the sample.
    • 公开了用于检测样品中选定材料的方法和装置。 在该方法中,将样本(842)放置在检测器线圈(846)附近,以产生由样本源辐射组成的电磁时域信号。 该信号首先被调节为将信号转换成已被去除频率分量高于选定频率的放大调节信号,然后滤波以选择性地传递(i)在dc和50KHz之间的频率范围内的低频频谱分量, 和(ii)所选材料的特性。 经滤波的信号与低频频谱分量的数据集交叉相关,其中(i)在dc和50KHz之间的频率范围内,以及(ii)所选择的材料的特性,以产生频域谱 频率范围在DC到50KHz之间。 然后使用该频谱来确定频域频谱是否包含作为所选材料的特征的一个或多个低频信号分量,以及在样品中是否存在这种材料的诊断。