中文摘要：

为提高工作流模型挖掘技术的准确性，提出了一种新的工作流模型挖掘方法。首先，阐述了工作流模型直接依赖矩阵的定义，并利用工作流日志建立了直接依赖矩阵的算法，设计了一种基于直接依赖矩阵的模型自动生成算法。给出的模型实例表明了这种方法在提高模型准确率与描述能力等方面的优势所在。

英文摘要：

To improve mining accuracy of workflow models, a new algorithm for mining workflow models was proposed. Firstly, the Workflow-Model Direct-depend Matrix （WDM） was defined, and an algorithm was designed to set up WDM by using workflow logs. Secondly, another algorithm was designed to automatically generate model based on WDM. The given example was used to demonstrate improvements on model accuracy and description ability of the proposed algorithm.