imperfect number 中文意思是什麼
imperfect number
解釋
不完數-
And considering the extremely imperfect nature of the fossil record, chances are that this figure significantly underrepresents the number of apes that actually existed at that time
由於化石記錄必然是斷爛朝報,這個數字很可能根本不能反映實情。 -
The object of single photon emission computed tomography ( spect ) is to reconstruct an unknown radioactivity distribution inside the body from projection data consisting of the number of photon collected on a collimated gamma camera. these projections are not simple line integrals but have point - spreads due to the imperfect collimator of the detector and attenuation due to the compton scattering. so
這種投影數據與透射ct中的數據不同,由於存在著光子的點擴散(由準直器引起)和衰減(由散射引起) ,已經不能用簡單的線積分來描述這個問題,因此相對于透射ct而言,這個領域將面臨很多困難。
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