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    • 4. 发明授权
    • Traced fast fourier transform apparatus and method
    • 追踪快速傅里叶变换装置及方法
    • US07246143B2
    • 2007-07-17
    • US09980780
    • 2001-04-09
    • Zhong HuPrakash Chakravarthi
    • Zhong HuPrakash Chakravarthi
    • G06F17/14
    • G06F17/142
    • A Fast Fourier Transform (FFT) arrangement for use in those situations in which not all of the outputs are desired is controlled in such a fashion that at least those multiplications (and possibly those additions) are not performed which do not contribute toward the desired outputs. The technique is usable in those situations in which the desired output signals are noncontiguous, or are in noncontiguous bins. The technique includes signal preprocessing in which the indices are adjusted so that the index for a particular stage points to those butterflies of the previous stage which contribute toward its output. The FFT is performed on the indexed data. In one embodiment, a pipelined FFT processor is controlled in a corresponding manner.
    • 以这样的方式来控制用于不需要所有输出的那些情况下的快速傅立叶变换(FFT)装置,使得至少不对不希望的输出有贡献的那些乘法(和可能的那些加法) 。 该技术可用于期望的输出信号不连续或处于不连续的箱中的情况。 该技术包括信号预处理,其中调整索引,使得特定阶段的索引指向有助于其输出的前一级的那些蝴蝶。 对索引数据执行FFT。 在一个实施例中,以相应的方式控制流水线FFT处理器。
    • 9. 发明申请
    • DIE EXTRACTOR
    • DIE萃取器
    • US20120311836A1
    • 2012-12-13
    • US13307181
    • 2011-11-30
    • JIAN-ZHONG HUDU-XI GAO
    • JIAN-ZHONG HUDU-XI GAO
    • B23P19/04
    • B25B27/023Y10T29/53878
    • A die extractor is used for pulling a workpiece out of a mold assembly, and includes a screw, a connection assembly and a nut assembly. The shaft defines a screw hole at one end of the shaft and an external screw thread. The nut assembly defines an inner screw thread. One end of the connection assembly is rotatably connected to the workpiece, the other end of the connection assembly is rotatably fixed in and connected to the screw hole of the shaft. The shaft passes through the nut assembly, the nut assembly may be twisted to drive the shaft and the connection assembly to rotate in a preset direction and the connection assembly pulls the workpiece out from the mold assembly.
    • 模具提取器用于将工件拉出模具组件,并且包括螺钉,连接组件和螺母组件。 轴在轴的一端和外螺纹上限定一个螺纹孔。 螺母组件限定内螺纹。 连接组件的一端可旋转地连接到工件,连接组件的另一端可旋转地固定在轴的螺钉孔中并与之连接。 轴通过螺母组件,螺母组件可以被扭转以驱动轴并且连接组件以预设方向旋转,并且连接组件将工件从模具组件拉出。