phononic crystal 中文意思是什麼
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Using the plane wave expansion method, from the computation result for the band gaps structure of infinitd periodic one dimension phononic crystal, it is found the width of the first gap relates with the material portion ratio
利用平面波展開法，計算一維無限周期結構聲子晶體的帶隙結構，發現每一帶隙的寬度與材料的組份比有關。
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