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1)  The genearalized tortoise coordination transformation
广义乌龟变换
2)  general tortoise coordinate transformation
广义乌龟坐标变换
1.
Motivated by the work of Robinson et al,we have researched Hawking radiation from the event horizon of Vaidya black hole via covariant anomalies theory and general tortoise coordinate transformation,and the result shows that the Hawking temperature can be correctly determined by covariant anomalies at the horizon.
受Robinson等人的工作的启发,我们推广协变反常理论和广义乌龟坐标变换研究了Vaidya黑洞事件视界处的Hawking辐射,结果表明用协变反常理论计算,可以得到正确的Hawking辐射流和黑洞温度。
3)  tortoise transformation
乌龟变换
4)  generalized tortoise coordinate
广义乌龟坐标
5)  tortoise coordinate transformation
乌龟坐标变换
1.
We put Dirac equation of near the event horizons of black hole change into second order equation of by employing the new tortoise coordinate transformation;get the Hawking radiation temperature near event horizons and Hawking radiation spectrum.
对于一般球对称动态黑洞,将四个相互耦合的Dirac方程化简为二阶方程,分离变量进行了退耦,利用乌龟坐标变换,在视界面附近得到辐射温度函数,导出了热辐射谱。
2.
The temperatures of Schwarzchild and Kerr-Newman black holes computed by this method are identical with the result computed by the definition of black hole s surface gravity,while the temperature of Vaidya black hole accords with the outcome calculated by reducing the Klein-Gordon equation near the event horizon to standard form with a new tortoise coordinate transformation.
由此方法算出的史瓦西黑洞和克尔-纽曼黑洞的温度与以前的结果相符,Vaidya黑洞的温度与引入新的乌龟坐标变换后算得的结果一致。
6)  generalized transform
广义变换
补充资料:乌龟
     (Reeves turtle;金龟、草龟、山龟) 
     国外分布于日本、朝鲜;在中国除东北地区、青  藏高原、山西、内蒙古、宁夏、新疆地区尚无发现外,  其他地区均有分布。 
     背甲长10厘米以上,有三条纵棱,褐色或黑色;  腹甲棕黄色,每一盾片外缘均有暗褐色斑块。头、颈  侧面有黄色纵纹。头、颈、尾和四肢均可完全缩入壳  内。雄性体较小,背甲黑色,尾长,有异臭;雌性体  较大,尾短,无异臭。
      生活于江河、湖沼或池塘中,半水栖,常群居,  有冬眠习性,以植物、小鱼、虾,螺年均食。4月下  旬交尾,5-8月为产卵期,雌龟产卵前,爬到向阳有  荫的岸边松软地上,用后肢掘穴产卵。年产卵3-4次,  每产5-7枚。卵椭圆形,灰白色,在自然条件下孵化  50-80天幼龟出壳,立即下水,即可独立生活。
      肉可食,腹甲称“龟板”,可入药。

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