Engineering Optimization: Theory and Practice, Fourth Edition

(Martin Jones) #1
Problems 485

subject to
0 ≤x 1

0 ≤x 2 ≤

x 1

3
0 ≤x 1 +


3 x 2 ≤ 6

7.23 Construct theφkfunction, according to(a)interior and(b)exterior penalty function
methods and plot its contours for the following problem:


Maximizef= 2 x

subject to
2 ≤x≤ 10

7.24 Construct theφkfunction according to the exterior penalty function approach and complete
the minimization ofφkfor the following problem.


Minimizef (x)=(x− 1 )^2

subject to
g 1 (x)= 2 −x≤ 0 , g 2 (x)=x− 4 ≤ 0

7.25 Plot the contours of theφkfunction using the quadratic extended interior penalty function
method for the following problem:


Minimizef (x)=(x− 1 )^2

subject to
g 1 (x)= 2 −x≤ 0 , g 2 (x)=x− 4 ≤ 0

7.26 Consider the problem:
Minimizef (x)=x^2 − 10 x− 1


subject to
1 ≤x≤ 10

Plot the contours of theφkfunction using the linear extended interior penalty function
method.

7.27 Consider the problem:


Minimizef (x 1 , x 2 )=(x 1 − 1 )^2 +(x 2 − 2 )^2

subject to
2 x 1 −x 2 =0 and x 1 ≤ 5

Construct theφkfunction according to the interior penalty function approach and complete
the minimization ofφ 1.
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