【摘 要】
：
通常情况下,黑洞将低质量粒子流喷向周围的星系,长度可达到数千光年.这些喷流让太空中的物质和能量实现再循环,影响一个星系在何时何地形成恒星.现在,科学家首次发现一个向外
论文部分内容阅读
通常情况下,黑洞将低质量粒子流喷向周围的星系,长度可达到数千光年.这些喷流让太空中的物质和能量实现再循环,影响一个星系在何时何地形成恒星.现在,科学家首次发现一个向外喷出铁和镍等更重原子的黑洞,喷流的移动速度达到光速的三分之二或者说每小时7亿千米.rn黑洞就像一个物质和能量聚集器,拥有令人敬畏的密度和引力,就连光线也无法逃脱它们的魔爪.质量相当于恒星的黑洞通常以伴星的物质为食,在来自恒星的物质流向黑洞时,黑洞周围形成一个物质盘.这个放射出X射线的物质盘温度极高.
其他文献
The passive voice often appears in patent documents but seldom gets the right translation results,which has greatly affected the understanding of the full t
Bag-of-words (BoW) representation becomes one of the most popular methods for representing image content and has been successfully applied to object categor
With the introduction of the household contract responsibility system, the traditional ruralcooperative medical service has declined rapidly in terms of its co
This paper studies the current status of handwritten character recognition and two major problems for research.Then one of the problems of feature selection
In recent years,web service is the hotspot in the academia and industry research.How to select the service to meet user needs accurately and efficiently,has
广州石油化工总厂炼油及化肥作业工人健康影响的研究陈伟明，卫建平（广东省职业病防治院）报道：对２０２１名石油化工炼油、化肥作业工人及１９０名对照组人员进行了体检，结果发现慢性上呼吸道炎症
Content extraction is the basis of many other technologies about data mining,which aims to extract the worthiest information from data-intensive web pages f
针对多个传感器于不同方位对某一特性参数进行测量的数据融合问题，提出了一种基于最优融合集的多传感器数据融合算法。该算法通过定义最优融合集荻取有效观测数据，并在此基
提起杨澜,很多人都说她太幸运了。从著名节目主持人到制片人,从传媒界到商界,从奥运形象大使到全国政协委员,到慈善大使,她一次次成功实现了人生的转型。杨澜是幸运的,但这种