air envelop 中文意思是什麼
air envelop
解釋
大氣層-
Not only including the heat transfer of envelop, it is also considered air infiltration inner heat gain lighting energy efficiency ratio for energy consume calculation
建築能耗計算不僅考慮圍護結構的傳熱，而且要包括空氣滲透傳熱、內部得熱、室內照明、空調採暖設備的能效比等因素。 -
Immediately i felt a soothing air of comfort envelop the venue ! a subtle ambiance tenderly caressed my face like a gentle wind lightly kissing the thin lace. how different it was from the coarse atmosphere that had hung like a thick, heavy blanket over the meditating fellow practitioners just a while ago
那種微細的氣氛像涼風沁入心脾，柔軟地如同薄紗伴隨著微風輕撫著我的臉龐和先前只有同修打坐時，感覺上粗糙地像在厚重的棉被窩里一般，真有如天壤之別。 -
In large rotating machinery using filmatic bearing ( turbogenerator, air compressor, etc. ) there is a potential trouble from impefect installation or running conditions, a metals " contact between rotors and shells. the trouble is usully called rubbing. the advantage of ae technologe in the rubbing diagnosis and early detection is showed. instead of classical ae characteristic parameters ( counts, amplitude, energy, duration and the other ones ) a new feature extraction by frequency analysis of ae envelop signals is discussed. both research of ae process and field experements indicate that periodic components in the envelop spectrum related to rotational speed increase evidently at the beginning of rubbing production, hence are highly sensitive to the rubbing fault diagnosis. according to the new design an acoustic emission equipment for the rubbing diagnosis named buaa ae testing system is developed and described
汽輪發電機、空氣壓縮機等採用油膜支撐的大型轉動機械，由於安裝或運行中的原因，在轉子旋轉過程中，可能和器壁發生輕微的摩擦和碰擊，簡稱碰摩.聲發射技術在碰摩發生特別是故障早期診斷上有優越性.本系統的特點是沒有沿用傳統的計數、幅度、能量和持續時間等聲發射特性參數，而是在聲發射包絡信號的頻率分析中進行特徵提取.聲發射發生的過程分析和現場試驗都表明這種方法對碰摩檢測很敏感，在碰摩發生的起始階段，包絡譜中與轉速同步的周期性分量顯著增加.根據這種新的設計思想自行研製了buaa碰摩聲發射檢測儀並對此作了介紹
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