Table 7: Effects of various standard deviations on the average MSEs of HS, IHS, NGHS, and IGHS.
 Problem NI Algorithm Example a () 2000 HS 0.031915 0.026339 0.021641 0.020161 0.031606 0.030344 0.073344 IHS 0.023133 0.01932 0.018847 0.017164 0.025531 0.02863 0.06602 NGHS 0.012373 0.01317 0.0080251 0.0087471 0.017701 0.015685 0.05541 IGHS 0.0090595 0.0081459 0.0063491 0.0060281 0.0082031 0.012456 0.05064 Example a () 5000 HS 0.04305 0.053554 0.044272 0.061806 0.052752 0.056594 0.072702 IHS 0.040038 0.05833 0.039185 0.050786 0.059166 0.044153 0.065037 NGHS 0.01394 0.017639 0.011319 0.016349 0.017154 0.022171 0.034087 IGHS 0.0042096 0.0054617 0.0032124 0.004798 0.0065079 0.01026 0.021561 Example b () 2000 HS 0.0020816 0.002023 0.0021274 0.0023366 0.0048039 0.011212 0.044087 IHS 0.0016932 0.0016984 0.001846 0.0020514 0.0042728 0.010803 0.043885 NGHS 0.0016883 0.0016907 0.0018335 0.0019744 0.004277 0.010804 0.043811 IGHS 0.0016881 0.0016894 0.0018321 0.0019734 0.0042728 0.010799 0.043809 Example b () 5000 HS 0.0021598 0.002027 0.0018595 0.0023973 0.0035314 0.011308 0.042578 IHS 0.0017257 0.0017276 0.0017401 0.0022161 0.0034728 0.011198 0.042543 NGHS 0.0017311 0.0017232 0.0017334 0.0022162 0.0034424 0.011172 0.0425 IGHS 0.0017063 0.0017185 0.0017295 0.0022099 0.0034249 0.011163 0.042491 Example a () 5000 HS 2.8627 3.9382 3.7033 3.2856 3.5386 5.1986 3.1728 IHS 2.8343 3.9123 3.6921 3.2648 3.5163 5.1678 3.1443 NGHS 2.6651 3.7442 3.5112 3.0952 3.3575 4.9886 2.9954 IGHS 2.6546 3.7404 3.4886 3.0747 3.3407 4.9715 2.9847 Example b () 5000 HS 1.2711 1.2759 1.2776 1.2868 1.292 1.2358 1.3175 IHS 1.2339 1.236 1.2508 1.2473 1.242 1.2165 1.2836 NGHS 1.0437 1.0418 1.0432 1.0411 1.0456 1.0064 1.0917 IGHS 1.0276 1.0264 1.0294 1.029 1.0219 0.99213 1.0689