Page 118 - Special Topic Session (STS) - Volume 1
P. 118

STS410 Abdul Ghapor H. et al.
                             Table 6.7 The power of performance of FDMCEC in outlier detection
                               n                  =10       =15       =20
                               70       0.2       6.80       9.20       13.80
                                        0.4       24.60      50.00      73.60
                                        0.6       74.60      96.20      99.20
                                        0.8       99.00      99.80      100.00
                                        1         99.60      100.00     100.00
                               100      0.2       5.60       6.40       14.80
                                        0.4       22.00      49.40      69.00
                                        0.6       72.00      93.80      99.60
                                        0.8       97.00      100.00     100.00
                                        1         99.80      100.00     100.00
                               130      0.2       6.40       9.00       12.00
                                        0.4       22.00      45.80      66.20
                                        0.6       65.80      91.40      99.80
                                        0.8       96.80      100.00     100.00
                                        1         99.60      100.00     100.00

                  For  better  understanding,  Figure  4  shows  the  pattern  of  the  power  of
                  performance when n = 100.




















                  Figure 4 Power of performance for FDMCEC in detecting outliers for equal error concentration
                                                  when n is 100.

                  4.  Application to Real Wind Direction Data
                      The  method  above  is  illustrated  using  real  wind  direction  data  from
                  Holderness coastline, Humberside Coast, UK, developed by UK Rutherford and
                  Appleton  Laboratories,  with  the  sample  size  of  129.  Variable  x  is  the  data
                  measured  by  the  techniques  of  HF  radar  system.  It  uses  pulse  radar  and
                  operates at frequency of 24.2-27 MHz. Meanwhile the variable y is measured
                  by  using  the  technique  of  anchored  wave  buoy.  Previous  researchers  of



                                                                     107 | I S I   W S C   2 0 1 9
   113   114   115   116   117   118   119   120   121   122   123