dark sector meaning in English

暗之领域
黑暗地带

The centre of the dark sector soliton evolution equation is derived by means of particle analytical method , equivalent form dark soliton ' s evolution equation in the photorefractive crystal , esceptialy between tow dark soliton ; the potential expression and it ' s numerically calculation is achieved , the conclusion is drawn : when the distance between two dark soliton = 0 , its potential function has minimum , shows there is an stead soliton in the photorefractive maternal , and interaction between two dark soliton raches biggest ; when the distance between two dark soliton 5 , its potential function is nearly equal zero , shows that the interaction between two lark soliton is very weak , nearly zero
摘要本文从光折变晶体中能得出暗孤子所满足的演化方程出发，用粒子分析力法得出了两暗孤子相互作用时，其质心间的距离所满足的演化方程，并得出了两暗孤子相互作用势函数的表达式，得到其数值解，并得出如下结论：当两暗孤子间距离= 0时，其相互作用势函数有最小值，表示在光折变晶体中有稳定的暗孤子对，并且相互作用达到最大；当两暗孤子距离5时，其相互作用势函数几乎为零，表示两暗孤子间相互作用很弱，几乎为零。