Then there are plans to examine the gravitational wave background, which would show what the universe looked like a fraction of a second after the Big Bang.
接下来的计划是检查引力波背景，这可以显示大爆炸后瞬间宇宙的样子。
So the author improves the 2-d sector filtering method, introduces the bang-transit and cake-cut filtering method in frequency - wave count area.
因此，作者将二维扇形滤波方法做了近一步的改善，引入了频率—波数域内带通切饼式滤波方法。
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