MatLab dasturida sohaga oid masalalarni yechish

Reactor=Reac(w,x)

Natijalarni olish uchun Subplot operatori yordamida aniqlaymiz.

Subplot(n, m, x)
Bu erda n-sonlar qatorining qiymati, m-sonlarning ustun qiymati, x-manzili.[A- 1 143-bet]




M file: ReactorSO2:
[a,b]=ode15s('Reac',[0 20],[0,750,202650]);
plot(a,b(:,1))
xlabel('W (kg)') ylabel('X') Figure plot(a,b(:,2)) xlabel('W') ylabel('T (K)') Figure plot(a,b(:,3)) xlabel('W') ylabel('P (Pa)')

M file: Reac:
function Reactor=Reac(w,x) X=x(1);
T=x(2);
Presion=x(3);
k=9.8692e-3*exp(-176008/(1.8*(T-273.15)+491.67) -110.1*log((1.8*(T- 273.15)+491.67))+912.8);
Kp=0.0031415*exp(42311/(1.987*(1.8*(T-273.15)+491.67)) -11.24); Ta=700;
Pto=202650; ySO2o=0.10; yO2o=0.11; yN2o=0.79;
PhiO2=yO2o/ySO2o; PSO2o=Pto*ySO2o; Fto=0.02153;
Fao=Fto*ySO2o; epsilon=-0.05; G=0.433; ph=0.45;
rhoo=0.866; Dp=0.00457;
visc=3.72e-5; Ac=0.0016;
rhob=542; To=770;
sumCp=300.85-0.0402*T+0.00018*T^2-9.071e-8*T^3; dCp=-21.535+0.0789*T-7.112*10^(-5)*T^2+2.447e-8*T^3;
deltaHr=-98480-21.535*(T-298)+0.0395*(T^2-298^2)-2.371*10^ (-5)*(T^3- 298^3)+6.117*10^(-9)*(T^4-298^4);
Ucorreg=9.3; if X<0.05;
ra =-k*((1-0.05)/0.05)^(0.5)*(PSO2o*((PhiO2-
0.5*X)/(1+epsilon*0.05))*(Presion/Pto)-(0.05/(Kp* (1-0.05)))^2); else
ra =-k*((1-X)/X)^(0.5)*(PSO2o*((PhiO2-0.5*X)/(1+epsilon*X))*(Presion/Pto)- (X/(Kp*(1-X)))^2);
end
Reactor(1,1)=-ra/Fao;
Reactor(2,1)=(Ucorreg*(Ta-T)+(-ra)*(-deltaHr))/(Fao*(sumCp+X*dCp)); Reactor(3,1)=-G*(1-ph)*(1+epsilon*X)*Pto*T*(150*(1-ph)
*visc/Dp+1.75*G)/(rhob*Ac*rhoo*Dp*ph^3*To*Presion);

Izoh: Matlabdabundan tashqari turli-tuman maxsus funksiyalarni qiymatlarini hisoblash uchun mo’ljallangan buyruqlar ham mavjud. Bu buyruqlarni hisoblashda MAPLE tizimining maxsus funkiyalaridan (MAPLE tizim yadrosida mavjud) foydalaniladi. Bu buyruqlarni >>help elfin va>>help mfunlist kabi buyruqlarini berish orqali batafsil ko’rish mumkin.
MATLAB da matеmatik ifodalar ustida shakl almashtirishlar MATLABda matеmatik ifodalar ustida shakl almashtirish jarayonida quyidagi amallarni bajarish mumkin:

• 
  O’xshash hadlarni ixchamlash;
  
• 
  Ko’paytuvchilarga ajratish;
  
• 
  Qavslarni ochish:
  
• 
  Ratsional kasrlarni qisqartirish va shu kabilar
  

Bunday simvolli hisoblashlarni bajarishdan oldin ifodadagi o'zgaruvchilar syms yordamchi buyrug'i (syms inglizcha "symbols", ya'ni "simvollar" so'zining qisqa ifodasi)orqali e'lon qilinadi.
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