/*-----Start_2D-acoutic Simulation-PML-------*/
/*
/*
space step is too long ,it may arise obvious dispersion
im=0
alph=20587654.346982
Ev0=0.000000
Ev1=0.000000
alph_pro=21705.499298
tau=0.001054
alph0=20000000.000000
im=1
alph=21305660.850484
Ev0=0.000000
Ev1=0.000000
alph_pro=20302.847167
tau=0.000953
alph0=20000000.000000
im=2
alph=22192634.861076
Ev0=0.000000
Ev1=0.000000
alph_pro=18967.114071
tau=0.000855
alph0=20000000.000000
im=3
alph=23307495.069984
Ev0=0.000000
Ev1=0.000000
alph_pro=17693.598272
tau=0.000759
alph0=20000000.000000
im=4
alph=24741182.670375
Ev0=0.000000
Ev1=0.000000
alph_pro=16473.939123
tau=0.000666
alph0=20000000.000000
im=5
alph=26642868.546347
Ev0=0.000000
Ev1=0.000000
alph_pro=15297.889844
tau=0.000574
alph0=20000000.000000
im=6
alph=29268105.170851
Ev0=0.000000
Ev1=0.000000
alph_pro=14162.707170
tau=0.000484
alph0=20000000.000000
im=7
alph=33038343.602511
Ev0=0.000000
Ev1=0.000000
alph_pro=13102.166895
tau=0.000396
alph0=20000000.000000
im=8
alph=38755549.388975
Ev0=0.000000
Ev1=0.000000
alph_pro=12137.551823
tau=0.000313
alph0=20000000.000000
im=9
alph=48130844.860325
Ev0=0.000000
Ev1=0.000000
alph_pro=11286.417415
tau=0.000234
alph0=20000000.000000
im=10
alph=65656239.011169
Ev0=0.000000
Ev1=0.000000
alph_pro=10556.170058
tau=0.000161
alph0=20000000.000000
im=11
alph=107170673.964507
Ev0=0.000000
Ev1=0.000000
alph_pro=9968.394399
tau=0.000093
alph0=20000000.000000
im=12
alph=341964468.491819
Ev0=0.000000
Ev1=0.000000
alph_pro=9454.081168
tau=0.000028
alph0=20000000.000000
im=13
alph=-257648201.624751
Ev0=0.000000
Ev1=0.000000
alph_pro=9021.459756
tau=-0.000035
alph0=20000000.000000
im=14
alph=-88542941.575384
Ev0=0.000000
Ev1=0.000000
alph_pro=8623.973617
tau=-0.000097
alph0=20000000.000000
im=15
alph=-75699152.742337
Ev0=0.000000
Ev1=0.000000
alph_pro=9060.077462
tau=-0.000120
alph0=20000000.000000
im=16
alph=-70217464.067361
Ev0=0.000000
Ev1=0.000000
alph_pro=9627.191135
tau=-0.000137
alph0=20000000.000000
im=17
alph=-69745488.175871
Ev0=0.000000
Ev1=0.000000
alph_pro=10352.020585
tau=-0.000149
alph0=20000000.000000
im=18
alph=-74268322.219169
Ev0=0.000000
Ev1=0.000000
alph_pro=11273.616264
tau=-0.000152
alph0=20000000.000000
im=19
alph=-85457631.812767
Ev0=0.000000
Ev1=0.000000
alph_pro=12429.423270
tau=-0.000146
alph0=20000000.000000
im=20
alph=-107444173.609613
Ev0=0.000000
Ev1=0.000000
alph_pro=13833.892595
tau=-0.000129
alph0=20000000.000000
im=21
alph=-151130750.814141
Ev0=0.000000
Ev1=0.000000
alph_pro=15475.540916
tau=-0.000102
alph0=20000000.000000
im=22
alph=-254908721.894499
Ev0=0.000000
Ev1=0.000000
alph_pro=17324.680585
tau=-0.000068
alph0=20000000.000000
im=23
alph=-682460175.753044
Ev0=0.000000
Ev1=0.000000
alph_pro=19326.027524
tau=-0.000028
alph0=20000000.000000
im=24
alph=1323456219.866122
Ev0=0.000000
Ev1=0.000000
alph_pro=21475.360097
tau=0.000016
alph0=20000000.000000
im=25
alph=346701555.077053
Ev0=0.000000
Ev1=0.000000
alph_pro=23836.345912
tau=0.000069
alph0=20000000.000000
im=26
alph=-183482037.852327
Ev0=0.000000
Ev1=0.000000
alph_pro=21484.069907
tau=-0.000117
alph0=20000000.000000
im=27
alph=-66049139.207197
Ev0=0.000000
Ev1=0.000000
alph_pro=19378.648034
tau=-0.000293
alph0=20000000.000000
im=28
alph=-82948932.230121
Ev0=0.000000
Ev1=0.000000
alph_pro=21533.492378
tau=-0.000260
alph0=20000000.000000
im=29
alph=-108692683.922467
Ev0=0.000000
Ev1=0.000000
alph_pro=23872.009182
tau=-0.000220
alph0=20000000.000000
im=30
alph=-153809841.871958
Ev0=0.000000
Ev1=0.000000
alph_pro=26429.312044
tau=-0.000172
alph0=20000000.000000
im=31
alph=-249258597.188648
Ev0=0.000000
Ev1=0.000000
alph_pro=29189.481854
tau=-0.000117
alph0=20000000.000000
im=32
alph=-586976891.618757
Ev0=0.000000
Ev1=0.000000
alph_pro=32167.536326
tau=-0.000055
alph0=20000000.000000
im=33
alph=2911475989.385759
Ev0=0.000000
Ev1=0.000000
alph_pro=35306.481588
tau=0.000012
alph0=20000000.000000
im=34
alph=458668939.686639
Ev0=0.000000
Ev1=0.000000
alph_pro=38618.686611
tau=0.000084
alph0=20000000.000000
im=35
alph=-197841614.923536
Ev0=0.000000
Ev1=0.000000
alph_pro=35308.613447
tau=-0.000179
alph0=20000000.000000
im=36
alph=-73883093.741435
Ev0=0.000000
Ev1=0.000000
alph_pro=32183.694431
tau=-0.000436
alph0=20000000.000000
im=37
alph=-91164857.474362
Ev0=0.000000
Ev1=0.000000
alph_pro=35255.587806
tau=-0.000387
alph0=20000000.000000
im=38
alph=-115859404.909000
Ev0=0.000000
Ev1=0.000000
alph_pro=38514.462906
tau=-0.000333
alph0=20000000.000000
im=39
alph=-154772699.839046
Ev0=0.000000
Ev1=0.000000
alph_pro=41990.389865
tau=-0.000271
alph0=20000000.000000
im=40
alph=-220566605.954164
Ev0=0.000000
Ev1=0.000000
alph_pro=45616.357504
tau=-0.000207
alph0=20000000.000000
im=41
alph=-355973038.169139
Ev0=0.000000
Ev1=0.000000
alph_pro=49398.152750
tau=-0.000139
alph0=20000000.000000
im=42
alph=-824902889.381444
Ev0=0.000000
Ev1=0.000000
alph_pro=53386.806696
tau=-0.000065
alph0=20000000.000000
im=43
alph=4145493029.215552
Ev0=0.000000
Ev1=0.000000
alph_pro=57555.297675
tau=0.000014
alph0=20000000.000000
im=44
alph=642218546.607074
Ev0=0.000000
Ev1=0.000000
alph_pro=61892.345101
tau=0.000096
alph0=20000000.000000
im=45
alph=-220544970.981672
Ev0=0.000000
Ev1=0.000000
alph_pro=57528.127993
tau=-0.000261
alph0=20000000.000000
im=46
alph=-86595854.375014
Ev0=0.000000
Ev1=0.000000
alph_pro=53308.153214
tau=-0.000616
alph0=20000000.000000
im=47
alph=-101261342.408445
Ev0=0.000000
Ev1=0.000000
alph_pro=57279.006344
tau=-0.000566
alph0=20000000.000000
im=48
alph=-120604214.474062
Ev0=0.000000
Ev1=0.000000
alph_pro=61469.529203
tau=-0.000510
alph0=20000000.000000
im=49
alph=-146808009.225026
Ev0=0.000000
Ev1=0.000000
alph_pro=65862.565867
tau=-0.000449
alph0=20000000.000000
im=50
alph=-180878663.138509
Ev0=0.000000
Ev1=0.000000
alph_pro=70333.446496
tau=-0.000389
alph0=20000000.000000
im=51
alph=-226577278.386072
Ev0=0.000000
Ev1=0.000000
alph_pro=74880.827834
tau=-0.000331
alph0=20000000.000000
im=52
alph=-287380289.346554
Ev0=0.000000
Ev1=0.000000
alph_pro=79448.807997
tau=-0.000277
alph0=20000000.000000
im=53
alph=-377810428.701425
Ev0=0.000000
Ev1=0.000000
alph_pro=84121.498992
tau=-0.000223
alph0=20000000.000000
im=54
alph=-522191721.800126
Ev0=0.000000
Ev1=0.000000
alph_pro=88878.418506
tau=-0.000170
alph0=20000000.000000
im=55
alph=-777433836.767334
Ev0=0.000000
Ev1=0.000000
alph_pro=93693.302071
tau=-0.000121
alph0=20000000.000000
im=56
alph=-1305331504.274956
Ev0=0.000000
Ev1=0.000000
alph_pro=98530.442728
tau=-0.000076
alph0=20000000.000000
im=57
alph=-2863639072.948341
Ev0=0.000000
Ev1=0.000000
alph_pro=103371.990585
tau=-0.000036
alph0=20000000.000000
im=58
alph=-25030426139.392372
Ev0=0.000000
Ev1=0.000000
alph_pro=108180.772077
tau=-0.000004
alph0=20000000.000000
im=59
alph=5105263796.034708
Ev0=0.000000
Ev1=0.000000
alph_pro=113004.619424
tau=0.000022
alph0=20000000.000000
im=60
alph=2555771646.100738
Ev0=0.000000
Ev1=0.000000
alph_pro=117902.761881
tau=0.000046
alph0=20000000.000000
im=61
alph=-272754484.199824
Ev0=0.000000
Ev1=0.000000
alph_pro=113221.757268
tau=-0.000415
alph0=20000000.000000
im=62
alph=-122302884.806795
Ev0=0.000000
Ev1=0.000000
alph_pro=108459.031396
tau=-0.000887
alph0=20000000.000000
im=63
alph=-121511454.208915
Ev0=0.000000
Ev1=0.000000
alph_pro=112482.243072
tau=-0.000926
alph0=20000000.000000
im=64
alph=-122220986.393382
Ev0=0.000000
Ev1=0.000000
alph_pro=116813.539738
tau=-0.000956
alph0=20000000.000000
im=65
alph=-126063638.714810
Ev0=0.000000
Ev1=0.000000
alph_pro=121688.994146
tau=-0.000965
alph0=20000000.000000
im=66
alph=-128412613.257455
Ev0=0.000000
Ev1=0.000000
alph_pro=126495.554698
tau=-0.000985
alph0=20000000.000000
im=67
alph=-129512441.512607
Ev0=0.000000
Ev1=0.000000
alph_pro=131265.985808
tau=-0.001014
alph0=20000000.000000
im=68
alph=-129877068.329175
Ev0=0.000000
Ev1=0.000000
alph_pro=136063.708209
tau=-0.001048
alph0=20000000.000000
im=69
alph=-129475073.368125
Ev0=0.000000
Ev1=0.000000
alph_pro=140876.680260
tau=-0.001088
alph0=20000000.000000
im=70
alph=-128139778.138481
Ev0=0.0000
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