Author Affiliations
Abstract
In 2017 the sensational gravitational wave event GW170817 was confirmed to originate from a binary neutron star merger. This was the first time in human history that such a violent catastrophic phenomenon was detected. A binary neutron star system consists of two co-rotating neutron stars, which may form after a very long time during the evolution of normal binary stars. We present a comprehensive introduction to this merger event, including a few aspects before and after the merger. In the near future, after an upgrade of current observational instruments, we may expect to detect further similar gravitational wave events and their various electromagnetic counterparts.
中子星 引力波 伽马射线暴 千新星 neutron star gravitational wave gamma-ray burst kilonova Journal of Semiconductors
2019, 48(9):
1 南京航空航天大学 自动化学院 生物医学工程系， 南京 210016
2 南京邮电大学 通信与信息工程学院，南京 210046
激光诱导间质热疗疗效评估的前提是必须获得准确的激光在不同功率、不同照射时间的生物组织温度场分布.利用多物理场直接耦合分析软件COMSOL Multiphysics构建了在组织光学参量不变情况下的三维有限元传热模型.该模型基于Pennes生物传热方程和轴对称高斯形状的激光光束热源方程，参量针对离体猪肝组织，考虑到了生物组织热物性密度、比热和热导率随温度变化的情况.仿真获得激光功率为0.77 W、0.95 W、1.23 W，照射时间为10~90 s，径向距离0~2 mm范围和轴向距离0~4 mm范围的温度场数据集.利用拟合算法，获得了自变量为激光功率、照射时间、径向距离和轴向距离的生物组织温度场分布模型.将功率为0.88 W和1.05 W时的结果与Pennes方程结果相比较，两者误差在5%以内.
激光诱导间质热疗 温度场 有限元 Pennes生物传热方程 Laser-induced interstitial thermotherapy Temperature distribution Finite element Pennes bio-heat transfer equation
