comparative risk meaning in Chinese

相对危险性

China marine oil spill contingency plan is now in the process of improvement . the inland waterway oil spill is another important area remain to be explored in term of increasing accident rate and booming shipping amount in yang tzi river . the need for inland waterway oil spill contingency plan is imperative . at strategic level , this paper compares several existing oil spill risk analysis methods including " historical date analysis " and " comparative risk indexes " , pointing out limitation of them , and then apply the " comparative risk indexes " approach to " river segment " spill risk analysis , developing " river segment oil spill comparative risk assessment framework " this paper also take new approach to collision and grounding in river by stochastic modeling tanker traffic in narrow waterway
本文在内河溢油反应战略规划层次上，分析现有的溢油风险评估方法，包括历史数据统计法和比较风险评估法，指出相关方法的适用性和局限性；基于长江下游水道采用“区段”和“河段”双层评估的思路，提出“长江下游河段比较溢油风险评估模式” ；将马尔科夫状态转移的思想应用到船舶运动描述中，从随机过程角度分析船舶在水道中的运行和事故发生，得出船舶事故概率计算模型。