中文摘要：

在对投影寻踪聚类方法深入分析的基础上，首次把投影寻踪聚类的思想和动态聚类方法结合起来构造投影指标，提出了投影寻踪动态聚类（PPDC）新方法，新方法在整个运算过程中完全由自身数据驱动，毋需人为给定参数，具有聚类结果客观、明确以及稳定性好、操作简便等特点。计算结果表明，PPDC法应用于区域泥石流危险度评价不仅切实可行，而且能克服了现有评价方法的不足，取得了令人满意的实际应用效果。上述应用为同类问题的研究开创了一条新途径，也进一步为生态保护、防灾减灾提供科学依据和技术支持。

英文摘要：

Based on penetrating analysis of the projection pursuit cluster method （PPC）, aprojection pursuit dynamic cluster （PPDC） method, which combines dynamic cluster method with projection pursuit principle, is proposed for the first time in this study. As to PPDC method, we construct a new projection index, which successfully avoids the problem of parameter calibration in PPC method and makes the cluster results more objective and definite, besides that, PPDC method is also robust and easy to operate in practice. PPDC method is applied to study multi-factor evaluation of regional dangerous degree of debris flow, and the tests show that it is not only feasible, but also can overcome the short coming of current evaluating methods and achieve satisfying practical results. This application initiates a new approach for solution of similar problems, and further more also provides scientific foundation and technical support for ecological protection, disaster prevention and disaster relief.