Simulation scripts: update 1

Scripts used to simulate and analyze the hypothetical pharmacokinetic model data. The aici.R and aicp.R scripts have been updated from http://dx.doi.org/10.6084/m9.figshare.157246.用于模拟与分析假想药代动力学模型数据的脚本。aici.R和aicp.R脚本已从http://dx.doi.org/10.6084/m9.figshare.157246更新。