On the assumption that there was a small solid sphere in the focusing area, the scattering field of concave sphere ultrasonic transducer was analyzed. 以凹球面超聲換能器為研究對象，假設聚焦區存在一剛性球形微粒，對此時的散射場進行分析。
From the Fourier space K corresponding to the scattering field of the object, an imaging evaluation mechanism based on the spatial spectral coverage is proposed. 摘要從物體散射場對應的傅里葉空間出發，提出基於空間譜域分佈的成像系統定性評價體系。
Finally, a method has presentedalso for the fringing field distribution measured experimentally in magneticfield. 最後敘述了由實驗測量得到磁場的邊緣場分佈時有限積分數值的計算方法。
The area pictured is one-thousandth of Kepler's full field of view, and shows hundreds of stars at the very edge of the constellation Cygnus. 本圖區域面積約為整個視圖的千分之一，顯示出天鵝座相當邊緣區域的數百顆恆星。
