查询词典 black hole

But, unlike the black hole at the centre of our Milky Way, the million-solar-mass black hole inside NGC 4945 is an Active Galactic Nucleus that is frantically consuming any surrounding matter, and so releasing tremendous amounts of energy.

但与银河系核心的黑洞不同，NGC 4945中数百万太阳质量的超级黑洞正在疯狂地吞噬周围的物质、并释放极为巨大的能量——是个活跃星系核。

In astrophysics, a white hole is a postulated celestial body that spews out matter, in other words an anti-black hole, or the time reversal of a black hole.

在天体物理学中，白洞是一个假定向外喷吐物质的天体，换句话说就是一个反黑洞，或时间逆向流动的洞。

Parikh and Wilczek further refined and extended the thought of Keski-Vakkuri and Kraus, the radiation was explained as a tunneling process crossing the barrier of horizon, and in literatures the method is called Parikh-Wilczek tunneling method. In our paper, we further studied the effect of Hawking radiation of the apparent horizon of the dynamical spacetime, the FRW universe, and the thermodynamics of the apparent horizon of the dynamical black hole modes, the Vaidya black hole and the McVittie black hole.

更为重要的是，近年来联系于视界热力学一些新的性质被发现：Einstein方程在视界上可以作为热力学第一定律的形式出现；在Friedmann-Robertson-Walker宇宙表观视界上，时空动力学方程(Friedmann方程)也可以写成一个所谓的统一热力学第一定律的形式；局域定义的FRW宇宙表观视界，也存在着在Kodama矢量观测者看来的Hawking辐射效应。

In order to study some problems relative to extremal black hole and entropy, a falling-in physical particle in metric and electromagnetic tensor field of a black hole is also studied.

在第二章中，我们首先考虑Reissner-Nordstrom黑洞的度规场和电磁场张量，研究了落入黑洞的带电物理粒子。

Utilizing the first law of thermodynamics for the black hole,the temperature of the black hole is calculated by its entropy.

计算黑洞温度的方法有多种。

Content Summary :According to my theory for spacetime of multimetrice of multiverse to be tangency each other , the white hole is germinating by the black hole having the mighty retractile pressure , it is restricted in the center of the black hole .

内容提要：根据作者提出的正交的多度规多宇宙时空理论，论述了白洞是由具有强大收缩压的黑洞孕育起来的，并被约束于黑洞的中心。

By using statistical entropy of the Dirac field of static spherically symmetric black hole , the black hole s radiant emittance is educed and calculated, the conclusion that the radiant emittance of the black hole is in proportionate to the quartic power of the temperature of the black hole s event horizon is drawn.

利用静态球对称黑洞Dirac场的统计熵，导出黑洞的辐出度，得到了黑洞的辐出度与黑洞视界温度的四次方成正比的结论。

Using the statistical entropy of the spinning gravitation field of static spherically symmetric black hole,the radiant emittance of static spherically symmetric black hole is calculated,and we obtain a conclusin that the radiant emittance of black hole is proportionate to quartic power of temperature of the event horizon of the black hole.

利用静态球对称黑洞引力自旋场的统计熵，导出静态球对称黑洞引力自旋场的辐出度，得到了黑洞的辐出度与黑洞视界温度的四次方成正比的结论。

Black hole, Wormhole and White hole1.Black hole: what is a black hole?

黑洞：什么是黑洞，简单来说黑洞存在于每个宇宙和星系。

"The fate of this black hole and others like it is an active area of research," said George Helou, deputy director of NASA's Spitzer Science Center at the California Institute of Technology in Pasadena."Some theories hold that the black hole might quiet down and eventually entera more dormant state like our Milky Way black hole."

美国加利福尼亚州帕萨迪纳市加州理工学院，美国宇航局斯皮策科研中心副主管乔治·赫鲁说：&这个黑洞以及类似黑洞的命运是一个研究热点，某些理论坚信黑洞最终会平静下来并最后像银河中心黑洞一样进入休眠模式。&

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。