用强子和弦级联模型 ,JPCIAE及相应的MonteCarlo事例产生器 ,研究相对论性核 -核碰撞中有限快度区间内正负荷电粒子比单事例起伏与能量、中心度、共振态衰变及快度间隔的关系 .JPCIAE模型能够较好地符合CERN SPS能区Pb +Pb碰撞的实验结果 .本文还用此模型预言了RHIC能区Au +Au碰撞和ALICE能区Pb +Pb碰撞中的正负荷电粒子比单事例起伏 .可以看出碰撞能量、中心度、共振态衰变及快度间隔对正负荷电粒子比单事例起伏的影响都不大 . Using the hadron chord concatenation model, JPCIAE and the corresponding Monte Carlo case generator, we study the relationship between positive and negative charge particles in relativistic nuclear-nuclear collisions than single case fluctuation and energy, center, resonance decay and fast JPCIAE model can well meet the experimental results of Pb + Pb collisions in the CERN SPS energy region.We also use this model to predict the positive and negative charge in Au + Au collisions and Pb + Pb collisions in ALICE energy regions The particles are smaller than the single case, and it can be seen that the impact energy, centrality, resonant state decay and fast interval have little effect on the positive charged particles than the single case undulation.