<div dir="ltr"><div dir="ltr"><div dir="ltr"><div>I have never seen any quantity raised to the 186038500 power. :-)<br></div><div>Double precision.</div><div><br></div><div><br></div><div>d = 2510.02d<br> a = 27.02d<br> b = 4.53d<br> c = 587.02d<br> m = 186038500<br> x = fspan(1d,25d,25)<br> y = d+(a-d)/(1+(x/c)^b)^m<br><br> print(x+" "+y)<br><br></div><div><br></div><div>(0) 1 27.15261929070493<br>(1) 2 30.08187239595736<br>(2) 3 46.1741014424274<br>(3) 4 96.80117019817772<br>(4) 5 214.0957520905181<br>(5) 6 433.778538060867<br>(6) 7 777.1109061695299<br>(7) 8 1224.84337331945<br>(8) 9 1702.177160490996<br>(9) 10 2103.542510714167<br>(10) 11 2357.030426786869<br>(11) 12 2470.21751524107<br>(12) 13 2503.483073444604<br>(13) 14 2509.408653665199<br>(14) 15 2509.991006732112<br>(15) 16 2510.019387317239<br>(16) 17 2510.019995000746<br>(17) 18 2510.019999986545<br>(18) 19 2510.01999999999<br>(19) 20 2510.02<br>(20) 21 2510.02<br>(21) 22 2510.02<br>(22) 23 2510.02<br>(23) 24 2510.02<br>(24) 25 2510.02<br><br></div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Mar 20, 2019 at 1:24 AM ABDULLA SAKALLI <<a href="mailto:abdulla.sakalli@iste.edu.tr">abdulla.sakalli@iste.edu.tr</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="overflow-wrap: break-word;">Dear All,<div>I’m trying to calculate the wind production of a wind farm. According to the data sheet of the wind turbine, I should use a 5th grades asymmetric sigmoidal function which is:</div><div><br></div><div>f(x)=d+(a-d)/(1+(x/c)^b)^m</div><div><br></div><div>d=2510.02</div><div>a=27.02</div><div>b=4.53</div><div>c=587.02</div><div>m=186038500</div><div><br></div><div>where x is the wind speed (3 m/s — 25 m/s).</div><div><br></div><div>When I run the code, the results are 27.02 which is equal to parameter “a”.</div><div><br></div><div>I cannot see any error during the script’s run. Does anyone has an idea or suggestion how I can fix it?</div><div><br></div><div>Thank you very much in advance.</div><div><br></div><div>Kind regards,</div><div><br></div><div><br><div>
<div dir="auto" style="letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><div dir="auto" style="letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none"><div dir="auto" style="overflow-wrap: break-word;"><div style="font-family:Helvetica;font-size:12px;font-style:normal;font-variant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><font color="#7f7f7f">---------------------------------------------------------------------------<br>Assoc. Prof. Abdulla Sakalli<br><br>Iskenderun Technical University<br>Faculty of Engineering and Natural Sciences<br>Dept. Industrial Engineering<br>Merkez Kampus<br>Iskenderun-Hatay-Turkey<br><a href="mailto:as@abdulla-sakalli.com" target="_blank">as@abdulla-sakalli.com</a><br><a href="mailto:abdulla.sakalli@iste.edu.tr" target="_blank">abdulla.sakalli@iste.edu.tr</a><br>+90 326 613 5600<br>+90 536 506 9191</font><br></div></div></div></div>
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