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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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3d 坐標系
Medical devices; Radiology equipment
3D 笛卡爾坐標系統提供的空間的三個物理尺寸: 長度、 寬度、 高度 (x、 y、 z)。三個軸定義系統是相互垂直的。
2d 2d 匹配
Medical devices; Radiology equipment
匹配的兩個收購形象 — — 通常 kV/kV,但可能是 MV/kV 或 MV/MV — — 用他們相應的參考圖像。匹配主要基於骨的解剖。
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Medical devices; Radiology equipment
即時在定義的時間,之間的關係的治療計畫軸的位置,並計畫畝。的第一個控制項的點定義初始軸的位置 (時間 = 0) ; 隨後的定義計畫的靜態或動態軸和穆行為作為整個處理通過時間的函數。 ...