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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 sxy5306[/i] [br]Origin Version (Select Help-->About Origin): Operating System:xp-sp2 I want to fit the temperature dependence of fluroscence intenstiy according to the formula I(T)=I0(1+Aexp(-E/KT)) , where I(T) is the fluroscence intensity, I0 is the intensity at zero temperature, E and K are constant, and T is temperature, How to realize his formula fitting? Thanks very much! [/quote]   Check here to include your profile signature. Check here to subscribe to this topic.