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matlab線性代數方程式問題~請求大大替我解答

題目:q=1/R1*(Ti-T1)=1/R2*(T1-T2)=1/R3*(T2-T3)=1/R4*(T3-To)1m^2的牆熱阻為 R1=0.036

R2=4.01

R3=0.408

R4=0.038 (度k/W)假設Ti=20以及To=-10度C 請求出T1 T2 T3以及牆面積為10m^2時的總熱量流失率感謝大大的幫忙~~
我想你是化工科的嗎..跟我一樣喔

很高興認識你我寫出以下的code

你參考參考

不懂再問clear allclcR = [0.036

4.01

0.408

0.0038];Ti = 20 273.15; To = -10 273.15;% q = (Ti - T(1))/R1 = (T(1) - T(2))/R2 = ...% (T(2) - T(3))/R3 = (T(3) - To)/R4% hence have 3 equations% 1. (Ti - T(1))/R1 = (T(1) - T(2))/R2% 2. (T(1) - T(2))/R2 = (T(2) - T(3))/R3% 3. (T(2) - T(3))/R3 = (T(3) - To)/R4% rerrange% 1. (1 R(2)/R(1))*T(1) - T(2) = R(2)/R(1)*Ti% 2. R(2)/R(1)*T(1) - (1 R(2)/R(1))*T(2) T(3) = 0% 3. R(4)/R(3)*T(2) - (1 R(4)/R(3))*T(2) = -To% matrixA = [1 R(2)/R(1)

-1

0; R(2)/R(1)

-(1 R(2)/R(1))

1; 0

R(4)/R(3)

-(1 R(4)/R(3))];b = [R(2)/R(1)*Ti; 0; -To];% A*x = b;% x = A