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Speleology
Speleology (also spelled spelæology or spelaeology) is the scientific study of caves and other karst features, their make-up, structure, physical properties, history, life forms, and the processes by which they form (speleogenesis) and change over time (speleomorphology). The term speleology is also sometimes applied to the recreational activity of exploring caves, but this is more properly known as caving, spelunking or potholing. Speleology and caving are often connected, as the physical skills required for in situ study are the same. Speleology is a cross-disciplinary field that combines the knowledge of chemistry, biology, geology, physics, meteorology and cartography to develop portraits of caves as complex, evolving systems.
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鏈反應
Energy; Nuclear energy
啟動它自己重複的反應。裂變鏈反應,在一個可裂變核吸收中子和次分裂自發性,釋放更多的中子。這些,反過來,能吸收其他裂變的原子核,釋放還是更多的中子。A 裂變鏈反應是自我維持中釋放的中子的數目時給定的時間等於或超過失去了由 nonfissionable 材料中吸收或轉義從系統中子的數目。 ...
凝汽器
Energy; Nuclear energy
大型換熱器用於冷卻從沸點以下汽輪機排汽,以便它可以返回到水作為熱源。在壓水堆中,水回到蒸汽發生器。在沸水反應堆中,它返回反應堆堆芯。從蒸汽凝汽器中刪除的熱轉移到迴圈水系統和環境,通過冷卻塔或直接進入人體內的水用完。 ...