“…Moreover, Table 4 lists the multimodal navigation. The applications of the multimodal navigation consist of entertainment [ 143 ], security [ 133 ], transport [ 2 , 106 , 107 , 110 , 112 , 147 ], assistance [ 2 , 16 , 108 ], exploration [ 3 , 134 , 135 , 138 , 141 ], social applications [ 12 , 140 ], tracking [ 105 , 125 , 131 , 145 , 146 ], caring and monitoring [ 113 ], disaster monitoring or search and rescue [ 136 , 149 ], floor cleaning [ 137 ], wheeled robot [ 109 ], person following [ 129 ], and false-ceiling inspection [ 157 ]. The combination of virtual sensors and neural networks is most commonly used in multimodal navigation, which represents 77.19% of the cited research.…”