基于相关向量机和模糊综合评价的路况预测模型

林浩,李雷孝,王慧,马志强,万剑雄

Model based on relevance vector machine and fuzzy comprehensive evaluation for road condition prediction

Hao LIN,Lei-xiao LI,Hui WANG,Zhi-qiang MA,Jian-xiong WAN

表 3 不同核函数的性能对比结果

Tab.3 Comparison of performance of different kernel function

编号 核函数 准确率 数据集1 数据集2 数据集3 1 $\exp\; \left( { - \dfrac{ {\left\| {{{a}}_1 - {{{a}}_2} } \right\|} }{ { {\rm{2} }{\sigma ^{\rm{2} } } } } } \right)$ 0.8084 0.7964 0.7131 2 $\exp\; \left( { - \dfrac{ { { {\left\| {{{a}}_1 - {{{a}}_2} } \right\|}^2} } }{ {2{\sigma ^2} } } } \right)$ 0.8520 0.8355 0.7452 3 ${{a}}_1^{\rm{T}}{{a}}_2$ 0.8529 0.8310 0.7472 4 $\gamma {\left( {{{a} }_1^{\rm{T} }{{a} }_2 + 1} \right)^d} + c$ 0.8514 0.8367 0.7544 5 $\exp\; \left( { - \dfrac{ {\left\| {{{a}}_1 - {{{a}}_2} } \right\|} }{ {2{\sigma ^2} } } } \right)\lambda + \left( { {\rm{1 - } }\lambda } \right)\left[ {\gamma { {\left( {{{a}}_1^{\rm{T}}{{a}}_2 + 1} \right)}^d} + c} \right]$ 0.8529 0.8368 0.7554 6 $\exp \;\left( { - \dfrac{ { { {\left\| {{{a}}_1 - {{{a}}_2} } \right\|}^2} } }{ {2{\sigma ^2} } } } \right)\lambda + \left( { {\rm{1 - } }\lambda } \right)\left[ {\gamma { {\left( {{{a}}_1^{\rm{T}}{{a}}_2 + 1} \right)}^d} + c} \right]$ 0.8503 0.8387 0.7555