ty -jour a2-歌曲，Yue au -ma，jiangming au -luo -xiankang py -2021 da -2021/09/02 ti-衰减模型的随机线性和非线性系统的最佳清算行为分析SP -85553689VL - 2021 AB - When the market environment changes, we extend the self-exciting price impact model and further analysis of investors’ liquidation behaviour. It is assumed that the model is accompanied by an exponential decay factor when the temporary impact and its coefficient are linear and nonlinear. Using the optimal control method, we obtain that the optimal liquidation behaviours satisfy the second-order nonlinear ODEs with variable coefficients in the case of linear and nonlinear temporary impact. Next, we solve the ODEs and get the form of the investors’ optimal liquidation behaviour in four cases. Furthermore, we prove the decreasing properties of the optimal liquidation behaviour under the linear temporary impact. Through numerical simulation, we further explain the influence of the changed parameters ρ ，，，， 一个 ，，，， b ，，，， X ， 和 α 关于投资者的清算策略 X t 在十二个场景中。发现了一些有趣的属性。SN -1076-2787 UR -https：//doi.org/10.1155/2021/8553689 do -10.1155/2021/8553689 JF-复杂性PB -Hindawi KW- hindawi kw -er--er- er- er-