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BSO: Binary Sailfish Optimization for feature selection in sentiment analysis
























                                                     (a) F-score values





















                                                    (b) Execution time

                     Figure 3. F-score and execution time comparisons of ML algorithms according to k value



























                                      Figure 4. The results of preprocessing combination

            4.3. Binary Sailfish Optimization (BSO)           also implement binary versions of the Harmony
                 for SA                                       Search (HS) 89  and Bat Algorithms (BA), 90  both
                                                              of which have been successfully applied to various
            In this section, we employ the BSO algorithm as   optimization problems. 91,92  Besides these, we ex-
            a feature selector for the first time in the con-  tend our performance evaluation by including the
            text SA. To evaluate the performance of BSO, we   Atom Search Optimization (ASO) algorithm,  93  a

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