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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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西麗

Software; CRM applications

Siri (語音解釋和識別介面) 是智慧的個人助理作為應用程式適用于蘋果的 IOS。這是為 iphone 4 的功能應用程式引入第一。

分歧

Earth science; Mapping science

在同一節線的兩個度量值的數值之間的區別。分歧和偏是實際上的同義詞。

月球的距離

Earth science; Mapping science

對著月亮的視線和走向另一個天體所測量地球上的一名觀察員的視線之間的角度。它是以前用來確定在海上的經度。

大圓距離

Earth science; Mapping science

加入兩個點的大圓的最短弧的長度。通常表示在海裡。

角多樣性

Wireless technologies; SSL certificates

角多樣性是使用多個天線波束接收多徑信號到達不同角度的技術。

天線

Wireless technologies; SSL certificates

天線是一種輻射和/或接收無線電信號的裝置。

天線波束

Wireless technologies; SSL certificates

天線波束,也稱為半功率束寬,是天線或束的相對力量是峰值功率的 50%以上的角度。

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