名詞

(複數)

1. (物理學) 三相點
   • 2006, David B. Troy, Paul Beringer, Remington: The Science and Practice of Pharmacy, →ISBN，頁號 179:

     A solid sublimes only when the pressure of its vapor is below that of the triple point for that substance.

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   A pressure vs. temperature diagram showing phases of matter and the triple point

2. (物理學) 三相點：入射衝擊波、反射衝擊波、馬赫桿和一個滑流的交匯點
   • 2007, Gabi Ben-Dor, Shock Wave Reflection Phenomena, →ISBN，頁號 198:

     When the incident shock wave is at position “a” the second triple point, T, is still inside the zone where the vibrational degree of freedom has not yet reached its equilibrium and the dissociational degree of freedom is still frozen at that position, as its excitation can be assumed to start only after vibrational equilibrium is reached.

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   • 2012, George Emanuel, Shock Wave Dynamics: Derivatives and Related Topics, →ISBN，頁號 81:

     A triple point may have a convex Mach stem, in which case the SS points upward.

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   • 2015, George Emanuel, Analytical Fluid Dynamics, Third Edition, →ISBN，頁號 130:

     One constant, however, is that the flow, just downstream of the incident shock, at a triple point, must be supersonic.

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3. (數學) 三相點：曲線和曲面延三條弧線相交的點
   • 1998, J. Scott Carter, Masahico Saito, Knotted Surfaces and Their Diagrams, →ISBN，頁號 162:

     The number of the distinguished edges whose orientations point towards the triple point is exactly one, or exactly two.

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   • 2007, Rida T Farouki, Pythagorean-Hodograph Curves: Algebra and Geometry Inseparable, →ISBN:

     A cubic surface with a triple point (a cubic cone) may or may not be rational.

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   Boy's surface, showing the triple point where it intersects itself

4. (氣象學) 三相點：囚錮鋒、冷鋒、暖鋒的交點
   • 1993, Meteorological and Geoastrophysical Abstracts:

     A further investigation is made of the reasonably-close relationship between some multiple tornado outbreaks in the British Isles and the passage of frontal-system triple points (TPs) using, principally, TORRO records and the hourly British Isles charts archived by the Meterorological Office at Bracknell.

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   • 2002, Joseph M. Moran, Online weather studies, →ISBN，頁號 232:

     ...together at the point of occlusion, or triple point, where conditions are favorable for formation of a new cyclone, sometimes called a secondary cyclone.

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   • 2013, Phil Croucher, Private Helicopter Pilot Studies JAA BW, →ISBN，頁號 8-34:

     The point where occluding starts is the triple point, because there are three air masses involved: that ahead of the occlusion, the warm air aloft, and the air behind the occlusion, or where the cold, warm and occluded fronts meet.

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5. (氣象學) 三相點：乾線、外流邊界、冷鋒等兩條邊界的交點
   • 1947, Maurice Adolph Garbell, Tropical and Equatorial Meteorology，頁號 205:

     Few, however, reach the African continent; some dissipate in the intertropical-front bulge east of southern Africa; others form triple points with the temperate fronts available for recurving anywhere between Australia and the Seychelles-Madagascar-Mascarenes (Reunion-Mauritius-Rodriguez) sector.

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   • 2006, The International Journal of Meteorology:

     It is concluded that the severe storms formed in close proximity to a "triple point" (TP), at which a synoptic cold front and "insolation-enhanced" warm front intersected.

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6. (板塊構造論) 三個板塊相交的點
   • 2003, Neville Price, Major Impacts and Plate Tectonics, →ISBN，頁號 131:

     Such a 'piecrust model' has been used to explain the generation of triple points which can give rise to splitting of a continental body.

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   • 2012, O. Oncken, C. Janssen, Basement Tectonics 11 Europe and Other Regions, →ISBN，頁號 43:

     Microstructures like static mineral growth, equilibrated grain boundaries with triple points especially in quartz and feldspar fabric and the lack of plastic crystal lattice deformations even in quartz indicate that metamorphism outlasted deformation.

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   • 2014, Duncan Keppie, The Analysis of Diffuse Triple Junction Zones in Plate Tectonics and the Pirate Model of Western Caribbean Tectonics, →ISBN，頁號 24:

     End-member stable triple point configurations are indicated in which the triple point is fixed to the North or South American plates (dashed grey lines) or fixed to the Caribbean Plate (dotted grey lines).

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triple point in East Africa, where the Arabian Plate, and two parts of the African Plate (the Nubian and the Somali) are splitting along the East African Rift Zone.