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    • 11. 发明授权
    • Methods and apparatus for performing reduced complexity discrete fourier transforms using interpolation
    • 使用插值执行复杂度降低的离散傅里叶变换的方法和装置
    • US08015226B2
    • 2011-09-06
    • US11859437
    • 2007-09-21
    • Kameran AzadetSamer HijaziSunitha KopparthiAlbert MolinaRamon Sanchez
    • Kameran AzadetSamer HijaziSunitha KopparthiAlbert MolinaRamon Sanchez
    • G06F17/14
    • G06F17/141
    • Methods and apparatus are provided for performing reduced complexity discrete Fourier transforms using interpolation An input sequence of length N is transformed by extending the input sequence to an extended input sequence of length M, where M is greater than N (a power of two greater than N); performing a discrete Fourier Transform (DFT), such as a power-of-two DFT, on the extended input sequence to obtain an interpolated sequence; and applying a conversion matrix to the interpolated sequence to obtain a DFT output for the input sequence of length N. The input sequence of length N can be extended to an extended input sequence of length M, for example, by employing a zero padding technique, a cyclic extension technique, a windowing of a cyclic extended sequence technique or a resampling-based interpolation technique to extend the input sequence. The conversion matrix is substantially a sparse matrix.
    • 提供的方法和装置用于使用插值来执行降低复杂度的离散付里叶变换通过将输入序列扩展为长度为M的扩展输入序列来变换长度为N的输入序列,其中M大于N(2的幂大于N ); 在扩展输入序列上执行离散傅立叶变换(DFT),例如二次幂DFT,以获得内插序列; 以及将转换矩阵应用到内插序列以获得长度为N的输入序列的DFT输出。例如,通过采用零填充技术,长度N的输入序列可以扩展到长度为M的扩展输入序列, 循环扩展技术,循环扩展序列技术的开窗或基于重新采样的插值技术来扩展输入序列。 转换矩阵基本上是稀疏矩阵。
    • 15. 发明申请
    • Fuel quality sensor assembly and method of use
    • 燃油质量传感器组装及使用方法
    • US20050040834A1
    • 2005-02-24
    • US10961714
    • 2004-10-08
    • Ramon SanchezSantos Burrola
    • Ramon SanchezSantos Burrola
    • G01N27/22G01N33/22G01N27/26
    • G01N27/221G01N33/2852
    • Described herein is a sensing element for sensing a fluid composition comprising an electrode base having a first electrode and a second electrode disposed thereon; the first electrode and the second electrode being electrically isolated from one another except through an external circuitry; the first electrode and the second electrode being configured, dimensioned, and positioned to define a gap therebetween such that electrical conduction through a fluid within the gap is proportional to a composition of the fluid. A sensing assembly is also described including a combination fuel pressure regulator and composition sensor. Also described herein is a method of using the sensing element in sensing a fluid composition.
    • 这里描述的是用于感测流体组合物的感测元件,其包括具有设置在其上的第一电极和第二电极的电极基体; 第一电极和第二电极除了通过外部电路之外彼此电隔离; 所述第一电极和所述第二电极被构造成尺寸和位置以在其间限定间隙,使得通过所述间隙内的流体的电传导与所述流体的组成成比例。 还描述了一种感测组件,其包括组合燃料压力调节器和组合传感器。 本文还描述了使用感测元件来感测流体组合物的方法。