All Forums  Origin Forum  Origin Forum  NL-PSO fitting help due to strange K2 values

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Screensize: 640 x 480 800 x 600 1024 x 768 1280 x 1024 UserName: Password: Anti-Spam Code: Format Mode: Basic  Help  Prompt  Format: Font Andale Mono Arial Arial Black Book Antiqua Century Gothic Comic Sans MS Courier New Georgia Impact Lucida Console Script MT Bold Stencil Tahoma Times New Roman Trebuchet MS Verdana   Size 1 2 3 4 5 6   Color Black Red Yellow Pink Green Orange Purple Blue Beige Brown Teal Navy Maroon LimeGreen Message: * HTML is OFF * Forum Code is ON Smilies [quote][i]Originally posted by yoyohami[/i] [br]Hello everyone. I am recently working on NL PSO fitting of my data. NLPSO is the user-defined equation: qt = qe^2*k2*t/1+qt*k2*t I'm quite new to the adsorption study, therefore, I only use the equation wiz initial parameters of qe=1 and k2 =1, the boundary of qe>0 and k2>0. i know my experimental data look poor, cuz I have only three time intervals of 2, 24 and 168 hours. Time (min) 0,0,120,120,1440,1440,10080, 10080 qe (mg/g) 0,0, 6.376 6.556 6.558 6.519 6.544 6.250 well, R2 is 0,99 and everything looks fantastic, except for the results of K2. K2 is 4.15E33 with SE of 6,16E44. I don't think it is right...but Idk how and where to debug. I do appreciate it if someone could help me even slightly! I am working master thesis[:(][:(][:(] No question is the biggest question. No news may be a good news [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.