CauchyWindow[x]
表示关于 x 的柯西窗函数.
CauchyWindow[x,α]
使用参数 α.
CauchyWindow
CauchyWindow[x]
表示关于 x 的柯西窗函数.
CauchyWindow[x,α]
使用参数 α.
更多信息
- CauchyWindow,也称为 Abel 窗,是一个窗函数,通常用于需要对数据进行短片段处理的信号处理应用中.
- 窗函数通过在每个片段末尾将数据值逐渐减小至零的方式提供平滑效果.
- CauchyWindow[x,α] 等于
. - CauchyWindow[x] 等价于 CauchyWindow[x,3].
- CauchyWindow 自动线性作用于列表.
范例
打开所有单元 关闭所有单元基本范例 (3)
Plot[CauchyWindow[x], {x, -1, 1}, Exclusions -> None]Plot3D[CauchyWindow[x]CauchyWindow[y], {x, -1, 1}, {y, -1, 1}, PlotRange -> All, Exclusions -> None]FunctionExpand[CauchyWindow[x]]FunctionExpand[CauchyWindow[x, α]]范围 (6)
CauchyWindow[0.1]Plot[CauchyWindow[x, 2], {x, -1, 1}, Exclusions -> None]Plot3D[CauchyWindow[x, α], {α, 0, 5}, {x, -1, 1}]Plot[CauchyWindow[(x - 1) / 2], {x, -1, 3}, Exclusions -> None]Plot3D[CauchyWindow[Sqrt[x ^ 2 + y ^ 2]], {x, -1, 1}, {y, -1, 1}, PlotRange -> All, Exclusions -> None]ListPlot[Array[CauchyWindow, 15, {-1 / 2, 1 / 2}], Filling -> Axis]ListPointPlot3D[Array[CauchyWindow[#1] CauchyWindow[#2]&, {15, 10}, {{-1 / 2, 1 / 2}}], Filling -> Axis, PlotRange -> All]应用 (2)
使用窗指定计算样本 PowerSpectralDensity:
proc = ARMAProcess[1, {.5}, {.3}, 1];
data = RandomFunction[proc, {50}];spec = PowerSpectralDensity[data, w, CauchyWindow];sd = PowerSpectralDensity[data, w];sd === specPlot[{sd, spec}, {w, -π, π}, PlotRange -> All, PlotLegends -> {"no window", "with window"}]Plot[{spec, Evaluate@PowerSpectralDensity[proc, w]}, {w, -π, π}, PlotLegends -> {"data", "process"}]data = RandomFunction[ARMAProcess[1, {.3}, {.4}, 1], {300}];EstimatedProcess[data, ARMAProcess[1, 1], ProcessEstimator -> {"SpectralEstimator", "Window" -> CauchyWindow}]属性和关系 (3)
CauchyWindow[x,0] 等价于狄利克雷窗:
FunctionExpand[CauchyWindow[x, 0]] == FunctionExpand[DirichletWindow[x]]area = Integrate[CauchyWindow[x], {x, -∞, ∞}]Plot[{CauchyWindow[x], CauchyWindow[x] / area}, {x, -1, 1}]f = FourierTransform[CauchyWindow[x], x, w]LogLinearPlot[20 Log[10, Abs[f]], {w, .1, 80}]可能存在的问题 (1)
柯西窗的二维采样将对样本的每一行使用一个不同的参数,当作为符号传递给 Array:
Array[CauchyWindow, {30, 30}, {{-1 / 2, 1 / 2}}]//ListPlot3DListPlot3D[Array[CauchyWindow[#1] CauchyWindow[#2]&, {30, 30}, {{-1 / 2, 1 / 2}}], PlotRange -> All]相关指南
文本
Wolfram Research (2012),CauchyWindow,Wolfram 语言函数,https://reference.wolfram.com/language/ref/CauchyWindow.html.
CMS
Wolfram 语言. 2012. "CauchyWindow." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/CauchyWindow.html.
APA
Wolfram 语言. (2012). CauchyWindow. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/CauchyWindow.html 年
BibTeX
@misc{reference.wolfram_2026_cauchywindow, author="Wolfram Research", title="{CauchyWindow}", year="2012", howpublished="\url{https://reference.wolfram.com/language/ref/CauchyWindow.html}", note=[Accessed: 09-August-2026]}
BibLaTeX
@online{reference.wolfram_2026_cauchywindow, organization={Wolfram Research}, title={CauchyWindow}, year={2012}, url={https://reference.wolfram.com/language/ref/CauchyWindow.html}, note=[Accessed: 09-August-2026]}