“…Table 8 summarizes implementation of PSO and its variants for STHTS. [92], [94], [97], [105], [110], [112], [124], [128], [134] Near With different neighborhood topologies [92], [123], [130] Constriction factor PSO [113], [115], [117], [129] Hybrid of PSO and Evolutionary programming [95] Updating Inertia weights PSO [106] Quantum behaved PSO [98], [99], [127] Modified adaptive PSO [100] Self-organizing hierarchical PSO [101], [102] Time varying acceleration coefficients PSO [103], [122] Improved PSO [96], [104], [109] Efficient PSO [107] Mixed-binary evolutionary PSO [111] Dynamically controlled PSO [114], [125] Hybrid of PSO and DE [116], [121] Hybrid of PSO and direct search method [118] Enhanced PSO [120] Auxiliary search based PSO [131] Hybrid of PSO and GSA [132] Fully informed PSO [135] Accelerated PSO [136], [137] FIGURE 9. Year wise distribution of arti...…”