In this paper, neutronphysics research based on the 4.
本文综述了北京大学在中子物理方面依托4。
2
Perturbation calculation will be required to rapidly determine the changes of reactivity caused by core neutron cross sections perturbation in reactor physics design and analysis.
在反应堆物理设计和分析时，经常要进行微扰计算，以快速分析堆芯中子截面扰动下反应性的变化量。
3
Perturbation calculation in reactor physics requires the neutron adjoint eigenvalue equation.