Using Absolute Values to Solve Systems of Nonlinear/Linear Equations for One Solution or Multiple Solutions in a Single Run 

 

Jsun Yui Wong

“Solving systems of nonlinear equations is perhaps the most difficult problem in all of numerical computations,” Rice [78, 1993, p. 355].

The computer program listed below seeks to solve simultaneously the following system of nonlinear equations:

(SIN(4 * PI * X(1) * X(2)) – 2 * X(2) – X(1)) =0,

((4 * PI – 1) / (4 * PI) * (E ^ (2 * X(1)) – E) + 4 * E * X(2) ^ 2 – 2 * E * X(1)) =0.

These two equations are from Burden, Faires, and Burden [16, p. 656, Exercise 3b/5b].

One notes line 1135, which is 1135 P = -ABS(SIN(4 * PI * X(1) * X(2)) – 2 * X(2) – X(1)) – ABS((4 * PI – 1) / (4 * PI) * (E ^ (2 * X(1)) – E) + 4 * E * X(2) ^ 2 – 2 * E * X(1)).

 

0 DEFDBL A-Z

1 DEFINT K

2 DIM B(99), N(99), A(2002), H(99), L(99), U(99), X(2002), D(111), P(111), PS(33), J44(2002), J(99), AA(99), HR(32), HHR(32), LHS(44), PLHS(44), LB(22), UB(22), PX(22), CC(20), RR(20), WW(20), AL(50), SW(50), SV(50), C2(22), C3(22), C4(22), C5(22)

81 FOR JJJJ = -32000 TO 32000

83 RANDOMIZE JJJJ

87 M = -4E+299

99 E = 2.718281828

111 PI = 3.141592654

120 FOR J44 = 1 TO 2

121 A(J44) = FIX(RND * 6)

122 REM A(J44) = (RND * 5)

 

123 NEXT J44

 

128 FOR I = 0 TO FIX(RND * 100000)

 

129 FOR KKQQ = 1 TO 2

 

130 X(KKQQ) = A(KKQQ)

131 NEXT KKQQ

 

135 FOR IPP = 1 TO FIX(1 + RND * 2.3)

 

143 j = 1 + FIX(RND * 2)

 

154 IF RND < .5 THEN GOTO 156 ELSE GOTO 162

156 REM

157 R = (1 – RND * 2) * (A(j))

 

160 X(j) = A(j) + (RND ^ (RND * 15)) * R

 

161 GOTO 169

162 IF RND < .5 THEN X(j) = A(j) – FIX(1 + RND * 1.3) ELSE X(j) = A(j) + FIX(1 + RND * 1.3)

 

169 NEXT IPP

 

1135 P = -ABS(SIN(4 * PI * X(1) * X(2)) – 2 * X(2) – X(1)) – ABS((4 * PI – 1) / (4 * PI) * (E ^ (2 * X(1)) – E) + 4 * E * X(2) ^ 2 – 2 * E * X(1))

 

1221 IF P <= M THEN 1670

 

1420 M = P

 

1444 FOR KLX = 1 TO 2

 

1455 A(KLX) = X(KLX)

 

1456 NEXT KLX

 

1557 GOTO 128

1670 NEXT I

1894 IF M < -.00001 THEN 1999

1923 PRINT A(1), A(2), M

1999 NEXT JJJJ

 

This BASIC computer program was run with QB64v1000-win [104].  Selected candidate solutions of  a single run through JJJJ= -31916 are shown   below:

.

.

.

1.033071472054275         -.2799618358382454                 -5.37330596683816D-16

-31981

-.3736982167411166          5.626648942274948D-02         -6.678685382510707D-17

-31979

.4080956624125035         -.4926293940538585                   -2.16840434497101D-16

-31974

.

.

.

.1478392372216056          -.4361776221953876                  -5.573883368747978D-16

-31916

 

One notes the four distinct solutions shown above.

Above there is no rounding by hand; it is just straight copying by hand from the monitor screen. On a personal computer with Processor Intel (R) Core (TM) 2 Duo CPU E8400 @ 3.0 GHz  3.0 GHz, 4.00 GB of RAM (3.9 GB usable),  64-bit Operating System, and QB64v1000-win [104], the wall-clock time (not CPU time) for obtaining the output through  JJJJ  = -31916 took 7 seconds, counting from “Starting program…”.  One can compare the computational results above with those in Burden, Faires, and Burden [16, p. 872, Exercise Set 10.2, Exercise 5b].

Acknowledgement

I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.

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Solving Another 2-Objective Integer Nonlinear Programming Problem with the Epsilon-Constraint Method

Jsun Yui Wong

The computer program listed below seeks to solve the following 2-objective integer nonlinear programming problem from Sharma, Dahiya, and Verma [54, p. 1924, Example 1]:

Miniimize      – (-2 * X(1) ^ 2 – 4 * X(1) * X(2) + X(1) – X(2)) / (2 * X(1) * X(2) + X(2) ^ 2 + X(1))

minimize      (X(1) ^ 2 + X(2) ^ 2 + 2 * X(1) * X(2)) / (X(1) ^ 2 + X(1) * X(2) + X(2))

subject to

X(1) >= 0 and integer

X(2) >= 0 and integer

3 * X(1) + 2 * X(2) >= 6

4 * X(1) + 5 * X(2) <= 20.
0 DEFDBL A-Z

1 DEFINT K

2 DIM B(99), N(99), A(2002), H(99), L(99), U(99), X(2002), D(111), P(111), PS(33), J44(2002), J(99), AA(99), HR(32), HHR(32), LHS(44), PLHS(44), LB(22), UB(22), PX(22), CC(20), RR(20), WW(20), AL(50), SW(50), SV(50), C2(22), C3(22), C4(22), C5(22)

81 FOR JJJJ = -32000 TO 32000

85 RANDOMIZE JJJJ

86 M = -3E+50

88 epsi = RND * 10

92 A(1) = (RND * 14)

93 A(2) = (RND * 14)
128 FOR I = 1 TO 3000

129 FOR KKQQ = 1 TO 2
130 X(KKQQ) = A(KKQQ)
131 NEXT KKQQ
151 FOR IPP = 1 TO FIX(1 + RND * 2)
153 J = 1 + FIX(RND * 2)
154 REM GOTO 162

156 r = (1 – RND * 2) * A(J)

158 X(J) = A(J) + (RND ^ (RND * 15)) * r

161 REM GOTO 169

162 REM IF RND < .5 THEN X(J) = A(J) – 1 ELSE X(J) = A(J) + 1

169 NEXT IPP

172 X(1) = INT(X(1))
174 X(2) = INT(X(2))

188 IF X(1) < 0## THEN 1670

189 IF X(2) < 0## THEN 1670
226 IF 3 * X(1) + 2 * X(2) < 6 THEN 1670

227 IF 4 * X(1) + 5 * X(2) > 20 THEN 1670
228 IF X(1) ^ 2 + X(1) * X(2) + X(2) = 0## THEN 1670

229 IF (X(1) ^ 2 + X(2) ^ 2 + 2 * X(1) * X(2)) / (X(1) ^ 2 + X(1) * X(2) + X(2)) > epsi THEN 1670

431 PDU = (-2 * X(1) ^ 2 – 4 * X(1) * X(2) + X(1) – X(2)) / (2 * X(1) * X(2) + X(2) ^ 2 + X(1))

466 P = PDU

1111 IF P <= M THEN 1670

1450 M = P

1454 FOR KLX = 1 TO 2

1455 A(KLX) = X(KLX)
1456 NEXT KLX

1527 gg01star = (-2 * X(1) ^ 2 – 4 * X(1) * X(2) + X(1) – X(2)) / (2 * X(1) * X(2) + X(2) ^ 2 + X(1))

1529 gg02star = (X(1) ^ 2 + X(2) ^ 2 + 2 * X(1) * X(2)) / (X(1) ^ 2 + X(1) * X(2) + X(2))
1557 GOTO 128
1670 NEXT I

1889 IF M < -99999999999 THEN 1999

1924 PRINT -gg01star, gg02star, epsi

1956 PRINT A(1), A(2), -M, JJJJ

1999 NEXT JJJJ
This BASIC computer program was run with QB64v1000-win [60]. The output of a single run through JJJJ= -31980 is summarized below:

.25       4       9.554092884063721
0       4       .25       -31999

3       1       3.04885506629944
2       0       3       -31995

2.142857142857143       1.285714285714286       4.794933199882507
2       1       2.142857142857143       -31994

.3333333333333333       3       3.203887939453125
0       3       .3333333333333333       -31993

2.142857142857143       1.285714285714286       5.443581342697144
2       1       2.142857142857143       -31992

3       1       9.825533032417297
2       0       3       -31990

.25       4       8.194036483764648
0        4       .25       -31989

2.142857142857143       1.285714285714286       8.698806166648865
2       1       2.142857142857143       -31988

3       1       3.1596546649933
2       0       3       -31987

2.142857142857143       1.285714285714286      4.93649301528931
2       1       2.142857142857143       -31985

.25       4       8.634269833564758
0       4       .25       -31983

3       1       9.953094720840454
2       0       3       -31982

.25       4       4.089516997337341
0       4       .25       -31981

.3333333333333333       3       3.526153564453125
0       3       .3333333333333333       -31980

Above there is no rounding by hand; it is just straight copying by hand from the monitor screen. On a personal computer with a Pentium Dual-Core CPU E5200 @2.50GHz, 2.50 GHz, 960 MB of RAM and QB64v1000-win [60], the wall-clock time (not CPU time) for obtaining the output through JJJJ = -31980 was 1 second, not including the time for “Creating .EXE file” (8 seconds, total, including the time for “Creating .EXE file”). The (-1 3) shown above is a dominated point. One can compare the computational results above with those in Sharma, Dahiya, and Verma [54, pp. 1924-1926, Example 1].
Acknowledgment

I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.
References

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Computer program for solving signomial mixed-integer nonlinear programming problems with free variables

Computer program for solving signomial mixed-integer nonlinear programming problems with free variables
Jsun Yui Wong
Similar to the computer program of the preceding paper, the computer program listed below aims to solve directly the following signomial programming problem from Tsai and Lin [89, Example 2 on p. 47]:

Minimize X(1) ^ .5 * X(2) + 3 * LOG(X(1))
subject to
-X(1) + X(2) <= 5
X(1) ^ .5 – X(2) <= 6
X(1) epsilon { .1, .5, .7, 1.2 }
-6 <= X(2) <= 4.

0 REM DEFDBL A-Z
1 REM DEFINT I, J, K
2 DIM B(99), N(99), A(2002), H(99), L(99), U(99), X(2002), D(111), P(111), PS(33), J(99), AA(99), HR(32), HHR(32), LHS(44), PLHS(44), LB(22), UB(22), PX(44), J44(44), PN(22), NN(22)
85 FOR JJJJ = -32000 TO 32000
89 RANDOMIZE JJJJ
90 M = -3D+30

119 A(1) = .1 + (RND * 1.1)

121 A(2) = -6 + (RND * 10)

128 FOR I = 1 TO 10000

    129 FOR KKQQ = 1 TO 2
        130 X(KKQQ) = A(KKQQ)
    131 NEXT KKQQ
    139 FOR IPP = 1 TO FIX(1 + RND * 2)

        140 B = 1 + FIX(RND * 2)

        144 IF RND < .5 THEN 160 ELSE GOTO 167

        160 R = (1 - RND * 2) * A(B)

        164 X(B) = A(B) + (RND ^ (RND * 15)) * R

        165 GOTO 168

        167 IF RND < .5 THEN X(B) = A(B) - FIX(RND * 2) ELSE X(B) = A(B) + FIX(RND * 2)

    168 NEXT IPP

    181 IF RND < .25 THEN X(1) = .1 ELSE IF RND < .3333 THEN X(1) = .5 ELSE IF RND < .5 THEN X(1) = .7 ELSE X(1) = 1.2

    376 IF -X(1) + X(2) > 5 THEN 1670

    379 IF X(1) ^ .5 - X(2) > 6 THEN 1670

    441 IF X(1) < .1 THEN 1670
    442 IF X(1) > 1.2 THEN 1670

    444 IF X(2) < -6 THEN 1670
    445 IF X(2) > 4 THEN 1670

    565 REM   
    566 PD1 = -X(1) ^ .5 * X(2) - 3 * LOG(X(1))
    569 p = PD1
    1111 IF p <= M THEN 1670
    1452 M = p
    1454 FOR KLX = 1 TO 2

        1455 A(KLX) = X(KLX)

    1456 NEXT KLX

1670 NEXT I
1775 IF M < -9999999 THEN 1999
1904 PRINT A(1), A(2), M, JJJJ

1999 NEXT JJJJ

This computer program was run with qb64v1000-win [103]. Its complete output of one run through JJJJ= -31995 is shown below. GW-BASIC also can handle this computer program.

.1 -5.683767 8.70512 -32000
.1 -5.683772 8.705122 -31999
.1 -5.683772 8.705122 -31998
.1 -5.68377 8.705121 -31997
.1 -5.683772 8.705122 -31996
.1 -5.683772 8.705122 -31995

Above there is no rounding by hand; it is just straight copying by hand from the monitor screen. On a personal computer with QB64v1000-win [103], the wall-clock time (not CPU time) for obtaining the output through JJJJ = -31995 was 2 seconds, counting from “Starting program…”. One can compare the computational results presented above with the computational results in Tsai and Lin [89, Example 2 and Table 1 on page 47].
The computational results presented above were obtained from the following computer system:
Processor: Intel (R) Core (TM) i5 CPU M 430 @2.27 GHz 2.26 GHz
Installed memory (RAM): 4.00GB (3.87 GB usable)
System type: 64-bit Operating System

Acknowledgement
I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.
References
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Computer program for solving signomial mixed-integer nonlinear programming problems with free variables

Computer program for solving signomial mixed-integer nonlinear programming problems with free variables
Jsun Yui Wong
Similar to the computer program of the preceding paper, the computer program listed below aims to solve directly the following signomial programming problem from Tsai and Lin [89, Example 1 on p. 45]:

Minimize
(X(1) ^ 2 * X(2) ^ -2 * X(3) – 2 * X(2) ^ .7 * X(3) ^ .2 + X(4) * X(5) ^ -2 – 2 * X(1) – 4 * X(3))
subject to
X(1) + 6 * X(2) – X(3) – 5 * X(4) <= 2
X(3) ^ 1.5 * X(4) + .5 * X(2) + 3 * X(1) <= -10
-X(1) – .5 * X(4) + X(5) <= 6
-7<= X(1) <=5
1 <= X(2) <= 10
1 <= X(3) <= 5
2 <= X(4) <= 8
2 <= X(5) <= 9
X(1), X(2), X(4), X(5) epsilon R, X(3) epsilon Z.

0 DEFDBL A-Z
1 REM DEFINT I, J, K
2 DIM B(99), N(99), A(2002), H(99), L(99), U(99), X(2002), D(111), P(111), PS(33), J(99), AA(99), HR(32), HHR(32), LHS(44), PLHS(44), LB(22), UB(22), PX(44), J44(44), PN(22), NN(22)
85 FOR JJJJ = -32000 TO 32000

89 RANDOMIZE JJJJ
90 M = -3D+30
91 A(1) = -7 + RND * 12

92 FOR J44 = 2 TO 5

    94 A(J44) = 1 + RND * 4

96 NEXT J44

128 FOR i = 1 TO 100000

    129 FOR KKQQ = 1 TO 5
        130 X(KKQQ) = A(KKQQ)
    131 NEXT KKQQ
    139 FOR IPP = 1 TO FIX(1 + RND * 5)

        140 B = 1 + FIX(RND * 5)

        144 IF RND < .5 THEN 160 ELSE GOTO 167

        160 R = (1 - RND * 2) * A(B)

        164 X(B) = A(B) + (RND ^ (RND * 15)) * R

        165 GOTO 168

        167 IF RND < .5 THEN X(B) = A(B) - FIX(RND * 2) ELSE X(B) = A(B) + FIX(RND * 2)

    168 NEXT IPP

    171 FOR J44 = 3 TO 3

        172 X(J44) = INT(X(J44))

    173 NEXT J44

    366 IF X(1) + 6 * X(2) - X(3) - 5 * X(4) > 2 THEN 1670

    372 IF X(3) ^ 1.5 * X(4) + .5 * X(2) + 3 * X(1) > -10 THEN 1670

    376 IF -X(1) - .5 * X(4) + X(5) > 6 THEN 1670


    441 IF X(1) < -7 THEN 1670
    442 IF X(1) > 5 THEN 1670

    444 IF X(2) < 1 THEN 1670
    445 IF X(2) > 10 THEN 1670

    446 IF X(3) < 1 THEN 1670

    447 IF X(3) > 5 THEN 1670
    448 IF X(4) < 2 THEN 1670

    449 IF X(4) > 8 THEN 1670

    450 IF X(5) < 2 THEN 1670

    451 IF X(5) > 9 THEN 1670


    564 PD1 = -(X(1) ^ 2 * X(2) ^ -2 * X(3) - 2 * X(2) ^ .7 * X(3) ^ .2 + X(4) * X(5) ^ -2 - 2 * X(1) - 4 * X(3))

    569 p = PD1
    1111 IF p <= M THEN 1670
    1452 M = p
    1454 FOR KLX = 1 TO 5

        1455 A(KLX) = X(KLX)

    1456 NEXT KLX

1670 NEXT i
1775 IF M < -2.908 THEN 1999

1904 PRINT A(1), A(2), A(3), A(4), A(5), M, JJJJ

1999 NEXT JJJJ

This computer program was run with qb64v1000-win [103]. Its complete output of one run through JJJJ= -31782 is shown below. GW-BASIC also can handle this computer program.

-5.400118338029741 4.63549561117594 1
3.882571065816902 2.541167194268502 -2.906685370935002
-31847
-5.356924592172367 4.554201442494374 1
3.79365681255878 2.539903814078217 -2.905622554601807
-31837
-5.358627122879355 4.557415346016703 1
3.797172990644173 2.539959372442728 -2.905619641192591
-31782

Above there is no rounding by hand; it is just straight copying by hand from the monitor screen. On a personal computer with QB64v1000-win [103], the wall-clock time (not CPU time) for obtaining the output through JJJJ = -31782 was 33 seconds, counting from “Starting program…”. One can compare the computational results presented above with the computational results in Tsai and Lin [89, Example 1, pages 45-47; Table 1 on p. 47].
The computational results presented above were obtained from the following computer system:
Processor: Intel (R) Core (TM) i5 CPU M 430 @2.27 GHz 2.26 GHz
Installed memory (RAM): 4.00GB (3.87 GB usable)
System type: 64-bit Operating System

Acknowledgement
I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.
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Computer program for solving mixed-integer nonlinear programming (MINLP) problems

Computer program for solving mixed-integer nonlinear programming (MINLP) problems
Jsun Yui Wong
Similar to the computer program of the preceding paper, the computer program listed below aims to solve directly the following mixed-integer nonlinear programming (MINLP) problem from Molina-Perez et al. [61, p.19, Test Problem F1]:

Minimize (X(1) – 1) ^ 2 + (X(2) – 3) ^ 2
subject to
(X(1) + 1) ^ 2 + (X(2) + 1) ^ 2 – 1 <= 0
X(1) epsilon [ -3, 1 ], X(1) is a continuous variable
X(2) epsilon { -3, -2, -1, 0, 1 }, X(2) is an integer variable.

One notes line 226, line 227, and line 228, which are
226 FOR J44 = 1 TO 2
227 IF RND < .5 THEN X(J44) = X(J44) ELSE X(J44) = INT(X(J44))
228 NEXT J44.

0 DEFDBL A-Z
1 REM DEFINT I, J, K
2 DIM B(99), N(99), A(2002), H(99), L(99), U(99), X(2002), D(111), P(111), PS(33), J(99), AA(99), HR(32), HHR(32), LHS(44), PLHS(44), LB(22), UB(22), PX(44), J44(44), PN(22), NN(22)
85 FOR JJJJ = -32000 TO 32000
89 RANDOMIZE JJJJ
90 M = -3D+30
91 FOR J44 = 1 TO 2
92 A(J44) = -3 + RND * 4

93 NEXT J44

128 FOR i = 1 TO 20000

    129 FOR KKQQ = 1 TO 2
        130 X(KKQQ) = A(KKQQ)
    131 NEXT KKQQ
    139 FOR IPP = 1 TO FIX(1 + RND * 2)
        140 B = 1 + FIX(RND * 2)

        144 IF RND < .5 THEN 160 ELSE GOTO 167

        160 r = (1 - RND * 2) * A(B)
        164 X(B) = A(B) + (RND ^ (RND * 15)) * r

        167 IF RND < .5 THEN X(B) = A(B) - FIX(RND * 2) ELSE X(B) = A(B) + FIX(RND * 2)

    168 NEXT IPP
    211 FOR J44 = 1 TO 2
        213 IF X(J44) < -3 THEN 1670
        214 IF X(J44) > 1 THEN 1670
    215 NEXT J44

    226 FOR J44 = 1 TO 2
        227 IF RND < .5 THEN X(J44) = X(J44) ELSE X(J44) = INT(X(J44))
    228 NEXT J44

    335 IF (X(1) + 1) ^ 2 + (X(2) + 1) ^ 2 - 1 > 0 THEN 1670

    566 PD1 = -(X(1) - 1) ^ 2 - (X(2) - 3) ^ 2
    569 p = PD1
    1111 IF p <= M THEN 1670
    1452 M = p
    1454 FOR KLX = 1 TO 2

        1455 A(KLX) = X(KLX)

    1456 NEXT KLX
1670 NEXT i
1775 IF M < -999999999 THEN 1999

1904 PRINT A(1), A(2), M, JJJJ

1999 NEXT JJJJ

This computer program was run with qb64v1000-win [103]. Its complete output of one run through JJJJ= -31995 is shown below. GW-BASIC also can handle this computer program.

-1 0 -13 -32000
-1 0 -13 -31999
-1 0 -13 -31998
-1 0 -13 -31997
-1 0 -13 -31996
-1 0 -13 -31995

Above there is no rounding by hand; it is just straight copying by hand from the monitor screen. On a personal computer with QB64v1000-win [103], the wall-clock time (not CPU time) for obtaining the output through JJJJ = -31995 was 2 seconds,
counting from “Starting program…”. One can see the computational results of Molina-Perez et al. [61, p. 19, Test Problem F1].

The computational results presented above were obtained from the following computer system:
Processor: Intel (R) Core (TM) i5 CPU M 430 @2.27 GHz 2.26 GHz
Installed memory (RAM): 4.00GB (3.87 GB usable)
System type: 64-bit Operating System.

Acknowledgement
I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.
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Computer program for solving mixed integer nonlinear programming problems

Computer program for solving mixed integer nonlinear programming problems


Jsun Yui Wong
Similar to the computer program of the preceding paper, the computer program listed below aims to solve directly the immediately following mixed integer nonlinear programming problem from Molina-Perez et al. [61, p. 19, Test Problem F5].

Minimize (X(1) – .5) ^ 2 + (X(2) – 1) ^ 2
subject to
– X(1) ^ 2 +X(2) = 0
X(1) epsilon [ -1, 3.1 ], X(1) is a continuous variable
X(2) epsilon { -1, 0, . . ., 4 }, X(2) is an integer variable.

One notes line 221 through line 223, which are 221 FOR J44 = 1 TO 2, 222 IF RND < .5 THEN X(J44) = X(J44) ELSE X(J44) = INT(X(J44)), and
223 NEXT J44, respectively.

0 DEFDBL A-Z
1 REM DEFINT I, J, K
2 DIM B(99), N(99), A(2002), H(99), L(99), U(99), X(2002), D(111), P(111), PS(33), J(99), AA(99), HR(32), HHR(32), LHS(44), PLHS(44), LB(22), UB(22), PX(44), J44(44), PN(22), NN(22)
85 FOR JJJJ = -32000 TO 32000
89 RANDOMIZE JJJJ

90 M = -3D+30
92 A(1) = -1 + RND * 4.1
93 A(2) = -1 + RND * 5

128 FOR i = 1 TO 2000

    129 FOR KKQQ = 1 TO 2
        130 X(KKQQ) = A(KKQQ)
    131 NEXT KKQQ
    139 FOR IPP = 1 TO FIX(1 + RND * 2)
        140 B = 1 + FIX(RND * 2)
        144 IF RND < .5 THEN 160 ELSE GOTO 167

        160 r = (1 - RND * 2) * A(B)
        164 X(B) = A(B) + (RND ^ (RND * 15)) * r

        167 IF RND < .5 THEN X(B) = A(B) - FIX(RND * 2) ELSE X(B) = A(B) + FIX(RND * 2)

    168 NEXT IPP

    211 FOR J44 = 1 TO 1
        213 IF X(J44) < -1 THEN 1670
        215 IF X(J44) > 3.1 THEN 1670
    216 NEXT J44
    217 FOR J44 = 2 TO 2
        218 IF X(J44) < -1 THEN 1670
        219 IF X(J44) > 4 THEN 1670
    220 NEXT J44

    221 FOR J44 = 1 TO 2

        222 IF RND < .5 THEN X(J44) = X(J44) ELSE X(J44) = INT(X(J44))

    223 NEXT J44

    233 X(2) = X(1) ^ 2

    294 FOR J44 = 1 TO 1
        295 IF X(J44) < -1 THEN 1670
        296 IF X(J44) > 3.1 THEN 1670
    297 NEXT J44

    298 FOR J44 = 2 TO 2
        299 IF X(J44) < -1 THEN 1670
        309 IF X(J44) > 4 THEN 1670
    321 NEXT J44

    345 FOR J44 = 1 TO 2

        348 IF RND < .5 THEN X(J44) = X(J44) ELSE X(J44) = INT(X(J44))

    349 NEXT J44

    565 PD1 = -(X(1) - .5) ^ 2 - (X(2) - 1) ^ 2

    569 p = PD1
    1111 IF p <= M THEN 1670
    1452 M = p
    1454 FOR KLX = 1 TO 2

        1455 A(KLX) = X(KLX)

    1456 NEXT KLX
1670 NEXT i

1775 IF M < -999999999 THEN 1999

1904 PRINT A(1), A(2), M, JJJJ

1999 NEXT
This computer program was run with qb64v1000-win [103]. Its complete output of one run through JJJJ= -31995 is shown below. GW-BASIC also can handle this computer program.

1 1 -.25 -32000
1 1 -.25 -31999
1 1 -.25 -31998
1 1 -.25 -31997
1 1 -.25 -31996
1 1 -.25 -31995

Above there is no rounding by hand; it is just straight copying by hand from the monitor screen. On a personal computer with QB64v1000-win [103], the wall-clock time (not CPU time) for obtaining the output through JJJJ = -31995 was 2 seconds, counting from “Starting program…”. One can see the computational results of Molina-Perez et al. [61, p. 19, Test Problem F5].

The computational results presented above were obtained from the following computer system:
Processor: Intel (R) Core (TM) i5 CPU M 430 @2.27 GHz 2.26 GHz
Installed memory (RAM): 4.00GB (3.87 GB usable)
System type: 64-bit Operating System.

Acknowledgement
I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.
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[81] Vikas Sharma (2012). Multiobjective integer nonlinear fractional programming problem: A cutting plane approach, OPSEARCH of the Operational Research Society of India (April-June 2012), 49(2):133-153.
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[84] Hardi Tambunan, Herman Mawengkang (2016). Solving Mixed Integer Non-Linear Programming Using Active Constraint. Global Journal of Pure and Applied Mathematics, Volume 12, Number 6 (2016), pp. 5267-5281. http://www.ripublication.com/gjpam.htm
[85] Mohamed Tawhid, Vimal Savsani (2018). Epsilon-constraint heat transfer search (epsilon-HTS) algorithm for solvinfg multi-objective engineering design problems. journal of computational design and engineering 5 (2018) 104-119.
[86] Frank A. Tillman, Ching-Lai Hwang, Way Kuo (1977). Determining Component Reliability and Redundancy for Optimun System Reliability. IEEE Transactions on Reliability, Vol. R-26, No. 3, Augusr 1977, pp. 162-165.
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Computer program for solving mixed integer nonlinear fractional programming problems

Jsun Yui Wong

Similar to the computer program of the preceding paper, the computer program listed below aims to solve directly the immediately following mixed integer nonlinear fractional programming problem:

Minimize (2 + X(5)) / (X(1) * X(2) * (2 * (X(3) + X(4)))) – X(5) ^ .5 * X(3) ^ 1.5 + 2 * X(2) + X(4)
subject to
(8 / (((X(1) * (X(2) + 3 * X(4)) ^ 2)))) + 1 / X(5) ^ 3 <= 2
-2 * X(1) + X(3) – X(4) <= 10
X(1) + X(3) + .5 * X(5) <= 8
.1 <= X(1), X(2), X(3), X(4), X(5) <= 10
X(3) is an integer
X(5) is an integer.
One notes that the problem above is the mathematical formulation of Tsai [87, p. 408, Example 3] plus the constraints that X(3) and X(5) are integers.

0 DEFDBL A-Z
1 REM DEFINT I, J, K
2 DIM B(99), N(99), A(2002), H(99), L(99), U(99), X(2002), D(111), P(111), PS(33), J(99), AA(99), HR(32), HHR(32), LHS(44), PLHS(44), LB(22), UB(22), PX(44), J44(44), PN(22), NN(22)
85 FOR JJJJ = -32000 TO 32000

89 RANDOMIZE JJJJ
90 M = -3D+30
125 FOR J44 = 1 TO 5
    126 A(J44) = .1 + RND * 9.9
127 NEXT J44
128 FOR i = 1 TO 500000
    129 FOR KKQQ = 1 TO 5
        130 X(KKQQ) = A(KKQQ)
    131 NEXT KKQQ
    139 FOR IPP = 1 TO FIX(1 + RND * 5)
        140 B = 1 + FIX(RND * 5)
        144 IF RND < .5 THEN 160 ELSE GOTO 167

        160 r = (1 - RND * 2) * A(B)
        164 X(B) = A(B) + (RND ^ (RND * 15)) * r

        165 GOTO 168

        167 IF RND < .5 THEN X(B) = A(B) - FIX(RND * 2) ELSE X(B) = A(B) + FIX(RND * 2)

    168 NEXT IPP
    203 X(3) = INT(X(3))

    205 X(5) = INT(X(5))
    211 FOR J44 = 1 TO 5
        213 IF X(J44) < .1 THEN 1670

        215 IF X(J44) > 10 THEN 1670
    219 NEXT J44
    375 IF (8 / (((X(1) * (X(2) + 3 * X(4)) ^ 2)))) + 1 / X(5) ^ 3 > 2 THEN 1670
    377 IF -2 * X(1) + X(3) - X(4) > 10 THEN 1670
    379 IF X(1) + X(3) + .5 * X(5) > 8 THEN 1670
    565 PD1 = -(2 + X(5)) / (X(1) * X(2) * (2 * (X(3) + X(4)))) + X(5) ^ .5 * X(3) ^ 1.5 - 2 * X(2) - X(4)
    569 p = PD1
    1111 IF p <= M THEN 1670
    1452 M = p
    1454 FOR KLX = 1 TO 5

        1455 A(KLX) = X(KLX)

    1456 NEXT KLX
1670 NEXT i
1775 IF M < 22.27881 THEN 1999
1904 PRINT A(1), A(2), A(3), A(4), A(5), M, JJJJ

1999 NEXT JJJJ

This computer program was run with qb64v1000-win [103]. Its complete output of one run through JJJJ= -31990 is shown below. GW-BASIC also can handle this computer program.

.5000000000000004 .6554256577148628 6
.7331866836234852 3 22.27881655871048
-32000

.5000000000000002 .657333734049241 6
.7325506581786944 3 22.2788184953256
-31999

.5 .6573294803667282 6 .7325520760728648
3 22.27881851157644 -31998

.4999999999999998 .657038272307595 6
.7326481460937687 3 22.2788194061248
-31990

Above there is no rounding by hand; it is just straight copying by hand from the monitor screen. On a personal computer with QB64v1000-win [103], the wall-clock time (not CPU time) for obtaining the output through JJJJ = -31990 was 11 seconds, counting from “Starting program…”.
The computational results presented above were obtained from the following computer system:
Processor: Intel (R) Core (TM) i5 CPU M 430 @2.27 GHz 2.26 GHz
Installed memory (RAM): 4.00GB (3.87 GB usable)
System type: 64-bit Operating System.

Acknowledgement
I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.
References
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[2] Siby Abraham, Sugata Sanyal, Mukund Sangrikar (2013), A Con
Acknowledgement
I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.
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Computer program for solving mixed integer nonlinear fractional programming problems
Jsun Yui Wong
Similar to the computer program of the preceding paper, the computer program listed below aims to solve directly the immediately following mixed integer nonlinear fractional programming problem:

Minimize (2 + X(5)) / (X(1) * X(2) * (2 * (X(3) + X(4)))) – X(5) ^ .5 * X(3) ^ 1.5 + 2 * X(2) + X(4)
subject to
(8 / (((X(1) * (X(2) + 3 * X(4)) ^ 2)))) + 1 / X(5) ^ 3 <= 2
-2 * X(1) + X(3) – X(4) <= 10
X(1) + X(3) + .5 * X(5) <= 8
.1 <= X(1), X(2), X(3), X(4), X(5) <= 10
X(3) is an integer
X(5) is an integer.
One notes that the problem above is the mathematical formulation of Tsai [87, p. 408, Example 3] plus the constraints that X(3) and X(5) are integers.

0 DEFDBL A-Z
1 REM DEFINT I, J, K
2 DIM B(99), N(99), A(2002), H(99), L(99), U(99), X(2002), D(111), P(111), PS(33), J(99), AA(99), HR(32), HHR(32), LHS(44), PLHS(44), LB(22), UB(22), PX(44), J44(44), PN(22), NN(22)
85 FOR JJJJ = -32000 TO 32000

89 RANDOMIZE JJJJ
90 M = -3D+30
125 FOR J44 = 1 TO 5
    126 A(J44) = .1 + RND * 9.9
127 NEXT J44
128 FOR i = 1 TO 500000
    129 FOR KKQQ = 1 TO 5
        130 X(KKQQ) = A(KKQQ)
    131 NEXT KKQQ
    139 FOR IPP = 1 TO FIX(1 + RND * 5)
        140 B = 1 + FIX(RND * 5)
        144 IF RND < .5 THEN 160 ELSE GOTO 167

        160 r = (1 - RND * 2) * A(B)
        164 X(B) = A(B) + (RND ^ (RND * 15)) * r

        165 GOTO 168

        167 IF RND < .5 THEN X(B) = A(B) - FIX(RND * 2) ELSE X(B) = A(B) + FIX(RND * 2)

    168 NEXT IPP
    203 X(3) = INT(X(3))

    205 X(5) = INT(X(5))
    211 FOR J44 = 1 TO 5
        213 IF X(J44) < .1 THEN 1670

        215 IF X(J44) > 10 THEN 1670
    219 NEXT J44
    375 IF (8 / (((X(1) * (X(2) + 3 * X(4)) ^ 2)))) + 1 / X(5) ^ 3 > 2 THEN 1670
    377 IF -2 * X(1) + X(3) - X(4) > 10 THEN 1670
    379 IF X(1) + X(3) + .5 * X(5) > 8 THEN 1670
    565 PD1 = -(2 + X(5)) / (X(1) * X(2) * (2 * (X(3) + X(4)))) + X(5) ^ .5 * X(3) ^ 1.5 - 2 * X(2) - X(4)
    569 p = PD1
    1111 IF p <= M THEN 1670
    1452 M = p
    1454 FOR KLX = 1 TO 5

        1455 A(KLX) = X(KLX)

    1456 NEXT KLX
1670 NEXT i
1775 IF M < 22.27881 THEN 1999
1904 PRINT A(1), A(2), A(3), A(4), A(5), M, JJJJ

1999 NEXT JJJJ

This computer program was run with qb64v1000-win [103]. Its complete output of one run through JJJJ= -31990 is shown below. GW-BASIC also can handle this computer program.

.5000000000000004 .6554256577148628 6
.7331866836234852 3 22.27881655871048
-32000

.5000000000000002 .657333734049241 6
.7325506581786944 3 22.2788184953256
-31999

.5 .6573294803667282 6 .7325520760728648
3 22.27881851157644 -31998

.4999999999999998 .657038272307595 6
.7326481460937687 3 22.2788194061248
-31990

Above there is no rounding by hand; it is just straight copying by hand from the monitor screen. On a personal computer with QB64v1000-win [103], the wall-clock time (not CPU time) for obtaining the output through JJJJ = -31990 was 11 seconds, counting from “Starting program…”.
The computational results presented above were obtained from the following computer system:
Processor: Intel (R) Core (TM) i5 CPU M 430 @2.27 GHz 2.26 GHz
Installed memory (RAM): 4.00GB (3.87 GB usable)
System type: 64-bit Operating System.

Acknowledgement
I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.
References
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Acknowledgement
I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.
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Computer program for solving mixed integer signomial programming problems

Computer program for solving mixed integer signomial programming problems


Jsun Yui Wong
Similar to the computer program of the preceding paper, the computer program listed below aims to solve directly the following mathematical programming problem from Chang [18, Example 5]:

Minimize
(.6224 * X(1) * X(3) * X(4) + 1.7781 * X(2) * X(3) ^ 2 + 3.1661 * X(1) ^ 2 * X(4) + 19.84 * X(1) ^ 2 * X(3))
subject to
X(1) – .0193 * X(3) >= 0
X(2) – .00954 * X(3) >= 0
(pie * X(3) ^ 2)* X(4) + (4 / 3) * pie * X(3) ^ 3) >= (750 * 1728

     1<= X(1) <= 1.375, discrete variable with discreteness .0625 
    .625<= X(2) <= 1, discrete variable with discreteness .0625 
    45<= X(3) <= 55, continuous variable 
    80<= X(4) <= 110, continuous variable. 

0 DEFDBL A-Z
1 REM DEFINT I, J, K
2 DIM B(99), N(99), A(2002), H(99), L(99), U(99), X(2002), D(111), P(111), PS(33), J(99), AA(99), HR(32), HHR(32), LHS(44), PLHS(44), LB(22), UB(22), PX(44), J44(44), PN(22), NN(22)
85 FOR JJJJ = -32000 TO 32000
89 RANDOMIZE JJJJ
90 M = -3D+30
117 pie = 3.1416
119 A(1) = 1 + (.0625 * FIX(RND * 7))
121 A(2) = .625 + (.0625 * FIX(RND * 7))

123 A(3) = 45 + (RND * 10)
124 A(4) = 80 + (RND * 30)
128 FOR i = 1 TO 500000

    129 FOR KKQQ = 1 TO 4
        130 X(KKQQ) = A(KKQQ)
    131 NEXT KKQQ
    139 FOR IPP = 1 TO FIX(1 + RND * 4)

        140 B = 1 + FIX(RND * 4)

        144 IF RND < .5 THEN 160 ELSE GOTO 167

        160 r = (1 - RND * 2) * A(B)

        164 X(B) = A(B) + (RND ^ (RND * 15)) * r

        165 GOTO 168

        167 IF RND < .5 THEN X(B) = A(B) - FIX(RND * 2) ELSE X(B) = A(B) + FIX(RND * 2)

    168 NEXT IPP
    198 X(1) = 1 + (.0625 * FIX(RND * 7))
    199 X(2) = .625 + (.0625 * FIX(RND * 7))

    241 IF X(1) < 1 THEN 1670
    242 IF X(1) > 1.375 THEN 1670

    244 IF X(2) < .625 THEN 1670
    245 IF X(2) > 1 THEN 1670

    246 IF X(3) < 45 THEN 1670

    247 IF X(3) > 55 THEN 1670
    248 IF X(4) < 80 THEN 1670

    249 IF X(4) > 110 THEN 1670
    333 X(4) = (750 * 1728 - (4 / 3) * pie * X(3) ^ 3) / (pie * X(3) ^ 2)

    359 IF X(1) - .0193 * X(3) < 0 THEN 1670
    365 IF X(2) - .00954 * X(3) < 0 THEN 1670
    441 IF X(1) < 1 THEN 1670
    442 IF X(1) > 1.375 THEN 1670

    444 IF X(2) < .625 THEN 1670
    445 IF X(2) > 1 THEN 1670

    446 IF X(3) < 45 THEN 1670

    447 IF X(3) > 55 THEN 1670
    448 IF X(4) < 80 THEN 1670

    449 IF X(4) > 110 THEN 1670
    564 PD1 = -(.6224 * X(1) * X(3) * X(4) + 1.7781 * X(2) * X(3) ^ 2 + 3.1661 * X(1) ^ 2 * X(4) + 19.84 * X(1) ^ 2 * X(3))

    569 p = PD1
    1111 IF p <= M THEN 1670
    1452 M = p
    1454 FOR KLX = 1 TO 4

        1455 A(KLX) = X(KLX)

    1456 NEXT KLX

1670 NEXT i
1775 IF M < -9999999 THEN 1999
1904 PRINT A(1), A(2), A(3), A(4), M, JJJJ

1999 NEXT JJJJ

This computer program was run with qb64v1000-win [103]. Its complete output of one run through JJJJ= -31998 is shown below. GW-BASIC also can handle this computer program.

1 .625 51.81347150212473 84.578167360766
-7006.767905259994 -32000

1 .625 51.8134715025891 84.57816735739247
-7006.767905227657 -31999

1 .625 51.81347150170441 84.5781673681945
-7006.767905289263 -31998

Above there is no rounding by hand; it is just straight copying by hand from the monitor screen. On a personal computer with QB64v1000-win [103], the wall-clock time (not CPU time) for obtaining the output through JJJJ = -31998 was 4 seconds, counting from “Starting program…”. One can compare the computational results presented above with the computational results in Chang [18, Example 5, pp. 1148-1150, Table 2 on p. 1450].
The computational results presented above were obtained from the following computer system:
Processor: Intel (R) Core (TM) i5 CPU M 430 @2.27 GHz 2.26 GHz
Installed memory (RAM): 4.00GB (3.87 GB usable)
System type: 64-bit Operating System.

Acknowledgement
I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.
References
Acknowledgement
I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.
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[104] Wayne L. Winston, (2004), Operations Research–Applications and Algorithms, Fourtth Edition, Brooks/Cole–Thomson Learning, Belmont, California 94002. https://optimization.mccormick.northwestern.edu/index.php/Geometric_Programming
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[106] James Yan. Signomial programs with equality constraints: numerical solution and applications. Ph. D. thesis. University of British Columbia, 1976.

Computer program for solving signomial programming problems

Computer program for solving signomial programming problems
Jsun Yui Wong
Similar to the computer program of the preceding paper, the computer program listed below aims to solve directly the following signomial example in Chang [18]:


Minimize (X(1) * X(2) ^ .5 * X(3) ^ 1.2 + 2 * X(1))
subject to
2 * X(1) + X(2) + X(3) >= 8
X(2) + 2 * X(3) < 10.5 X(1) + 2 * X(3) > 10
1<= X(1) <= 5
1<= X(2) <= 5
1<= X(3) <= 5.

0 DEFDBL A-Z
1 REM DEFINT I, J, K
2 DIM B(99), N(99), A(2002), H(99), L(99), U(99), X(2002), D(111), P(111), PS(33), J(99), AA(99), HR(32), HHR(32), LHS(44), PLHS(44), LB(22), UB(22), PX(44), J44(44), PN(22), NN(22)
85 FOR JJJJ = -32000 TO 32000
89 RANDOMIZE JJJJ
90 M = -3D+30

96 REM      

111 FOR J44 = 1 TO 3
    112 A(J44) = 1 + RND * 4
115 NEXT J44
128 FOR i = 1 TO 200000
    129 FOR KKQQ = 1 TO 3
        130 X(KKQQ) = A(KKQQ)
    131 NEXT KKQQ
    139 FOR IPP = 1 TO FIX(1 + RND * 3)
        140 B = 1 + FIX(RND * 3)
        144 IF RND < .5 THEN 160 ELSE GOTO 167
        160 r = (1 - RND * 2) * A(B)
        164 X(B) = A(B) + (RND ^ (RND * 15)) * r
        165 GOTO 168
        167 IF RND < .5 THEN X(B) = A(B) - FIX(RND * 2) ELSE X(B) = A(B) + FIX(RND * 2)
    168 NEXT IPP
        251 FOR J44 = 1 TO 3
        255 IF X(J44) < 1 THEN 1670
        256 IF X(J44) > 5 THEN 1670
    257 NEXT J44

    364 IF 2 * X(1) + X(2) + X(3) < 8 THEN 1670

    368 IF X(2) + 2 * X(3) < 10.5 THEN 1670

    369 IF X(1) + 2 * X(3) > 10 THEN 1670
    567 PD1 = -(X(1) * X(2) ^ .5 * X(3) ^ 1.2 + 2 * X(1))
    569 P = PD1
    1111 IF P <= M THEN 1670
    1452 M = P
    1454 FOR KLX = 1 TO 3

        1455 A(KLX) = X(KLX)

    1456 NEXT KLX

1670 NEXT i
1775 IF M < -9.46 THEN 1999
1904 PRINT A(1), A(2), A(3), M, JJJJ

1999 NEXT JJJJ

This computer program was run with qb64v1000-win [103]. Its complete output of one run through JJJJ= -31998 is shown below. GW-BASIC also can handle with this computer program.

1.000000000000038 1.500372149267446 4.4998136869499
-9.44616980496227 -31999

1 1.500046695644596 4.499976413759123
-9.445685264432751 -31998

Above there is no rounding by hand; it is just straight copying by hand from the monitor screen. On a personal computer with QB64v1000-win [103], the wall-clock time (not CPU time) for obtaining the output through JJJJ = -31998 was 2 seconds, counting from “Starting program…”. One can compare the computational results presented above with the computational results in Chang [18, Example 4, pp. 1445-1448].
The computational results presented above were obtained from the following computer system:
Processor: Intel (R) Core (TM) i5 CPU M 430 @2.27 GHz 2.26 GHz
Installed memory (RAM): 4.00GB (3.87 GB usable)
System type: 64-bit Operating System.

Acknowledgement
I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.
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Computer program for solving polynomial mixed 0-1 fractional programming problems

Computer program for solving polynomial mixed 0-1 fractional programming problems


Jsun Yui Wong
Similar to the computer program of the preceding paper, the computer program listed below aims to solve directly the following geometric programming problem from Chang [19]:
Minimize
((1 + X(1) * X(2)) / (.5 * X(1) * X(2) + X(2) * X(3)) + ((2 + 3 * X(1) * X(3)) / (2 * X(1) + X(3))))
subject to
X(1) + X(1) * X(3) + X(1) * X(2) * X(3) >= 1,
2 * X(1) + 3 * X(3) – 4 * X(4) <= 3,

.5 * X(1) * X(2) + X(2) * X(3) > 0,
2 * X(1) + X(3) > 0,
where X(1), X(2), X(3), and X(4) are 0-1 integer variables.

0 REM DEFDBL A-Z
1 REM DEFINT I, J, K
2 DIM B(99), N(99), A(2002), H(99), L(99), U(99), X(2002), D(111), P(111), PS(33), J(99), AA(99), HR(32), HHR(32), LHS(44), PLHS(44), LB(22), UB(22), PX(44), J44(44), PN(22), NN(22)
85 FOR JJJJ = -32000 TO 32000
89 RANDOMIZE JJJJ
90 M = -3D+30
91 FOR J44 = 1 TO 4
92 A(J44) = INT(0 + RND)
93 NEXT J44
128 FOR i = 1 TO 500
129 FOR KKQQ = 1 TO 4
130 X(KKQQ) = A(KKQQ)
131 NEXT KKQQ
139 FOR IPP = 1 TO FIX(1 + RND * 4)
140 B = 1 + FIX(RND * 4)

        144 IF RND < .5 THEN 160 ELSE GOTO 167

        160 r = (1 - RND * 2) * A(B)

        164 X(B) = A(B) + (RND ^ (RND * 15)) * r

        165 GOTO 168

        167 IF RND < .5 THEN X(B) = A(B) - FIX(RND * 2) ELSE X(B) = A(B) + FIX(RND * 2)

    168 NEXT IPP
    231 FOR J44 = 1 TO 4
        235 X(J44) = INT(X(J44))
    238 NEXT J44

    251 IF X(1) < 0 THEN 1670
    252 IF X(1) > 1 THEN 1670

    254 IF X(2) < 0 THEN 1670
    255 IF X(2) > 1 THEN 1670

    256 IF X(3) < 0 THEN 1670

    257 IF X(3) > 1 THEN 1670
    259 IF X(4) < 0 THEN 1670

    260 IF X(4) > 1 THEN 1670

    373 IF X(1) + X(1) * X(3) + X(1) * X(2) * X(3) < 1 THEN 1670

    375 IF 2 * X(1) + 3 * X(3) - 4 * X(4) > 3 THEN 1670

    377 IF .5 * X(1) * X(2) + X(2) * X(3) <= 0 THEN 1670
    379 IF 2 * X(1) + X(3) <= 0 THEN 1670
    566 PD1 = -((1 + X(1) * X(2)) / (.5 * X(1) * X(2) + X(2) * X(3)) + ((2 + 3 * X(1) * X(3)) / (2 * X(1) + X(3))))
    569 P = PD1
    1111 IF P <= M THEN 1670
    1452 M = P
    1454 FOR KLX = 1 TO 4
        1455 A(KLX) = X(KLX)
    1456 NEXT KLX
1670 NEXT i
1775 REM IF M < -9999999 THEN 1999
1904 PRINT A(1), A(2), A(3), A(4), M, JJJJ

1999 NEXT JJJJ

This computer program was run with qb64v1000-win [103]. Its complete output of one run through JJJJ= -31995 is shown below. GW-BASIC also can handle with this computer program.
1 1 0 0 -5
-32000
0 0 0 0 -3E+30
-31999
0 0 0 0 -3E+30
-31998
1 1 0 0 -5
-31997
1 1 1 1 -3
-31996

1 1 1 1 -3
-31995
Above there is no rounding by hand; it is just straight copying by hand from the monitor screen. On a personal computer with QB64v1000-win [103], the wall-clock time (not CPU time) for obtaining the output through JJJJ = -31995 was 1 second, counting from “Starting program…”. One can compare the computational results presented above with the results in Chang [19].
The computational results presented above were obtained from the following computer system:
Processor: Intel (R) Core (TM) i5 CPU M 430 @2.27 GHz 2.26 GHz
Installed memory (RAM): 4.00GB (3.87 GB usable)
System type: 64-bit Operating System.

Acknowledgement
I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.
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Computer program for completely solving mixed integer fractional posynomial programming problems

Computer program for completely solving mixed integer fractional posynomial programming problems


Jsun Yui Wong


Similar to the computer program of the preceding paper, the computer program listed below aims to solve directly the following geometric programming problem in Chang [18, Example 4]:


Minimize
((ABS(X(5) ^ 1.8) * X(1) * X(3) ^ .3 * X(4) ^ 1.5 + X(2) * X(3) ^ 1.8 * X(4) ^ 1.3 * X(5) + X(1) * X(2) * X(3) ^ 1.7) / (X(1) * X(3) * X(4) + X(2) * X(3) ^ 2.3 * X(4) ^ 1.4))


subject to
2 * X(1) + X(1) * X(3) ^ 1.6 >= 5
X(1) + X(2) >= 1
X(2) + X(4) <= 6 X(1) + X(2) + X(5) >= 3
1 <= X(3) <= 7
1 <= X(4) <= 6
1 <= X(5) <= 5
where X(1) and X(2) are binary variables (0-1 integer variables)
X(3) and X(4) are continuous variables
X(5) is absolute continuous variable.

0 DEFDBL A-Z
1 REM DEFINT I, J, K
2 DIM B(99), N(99), A(2002), H(99), L(99), U(99), X(2002), D(111), P(111), PS(33), J(99), AA(99), HR(32), HHR(32), LHS(44), PLHS(44), LB(22), UB(22), PX(44), J44(44), PN(22), NN(22)
85 FOR JJJJ = -32000 TO 32000
89 RANDOMIZE JJJJ
90 M = -3D+30
95 PI = 3.1416
113 A(3) = 1 + RND * 6
114 A(4) = 1 + RND * 3
115 A(5) = 1 + RND * 6
116 FOR J44 = 1 TO 2

    117 A(J44) = INT(RND * 1)
122 NEXT J44
128 FOR i = 1 TO 50000

    129 FOR KKQQ = 1 TO 5

        130 X(KKQQ) = A(KKQQ)
    131 NEXT KKQQ

    139 FOR IPP = 1 TO FIX(1 + RND * 5)
        140 B = 1 + FIX(RND * 5)
        144 IF RND < .5 THEN 160 ELSE GOTO 167
        160 r = (1 - RND * 2) * A(B)
        164 X(B) = A(B) + (RND ^ (RND * 15)) * r
        165 GOTO 168
        167 IF RND < .5 THEN X(B) = A(B) - FIX(RND * 2) ELSE X(B) = A(B) + FIX(RND * 2)
    168 NEXT IPP
    221 FOR J44 = 1 TO 2
        223 X(J44) = INT(X(J44))
        224 IF X(J44) < 0 THEN 1670
        226 IF X(J44) > 1 THEN 1670
    227 NEXT J44
    244 IF X(3) < 1 THEN 1670
    245 IF X(3) > 7 THEN 1670
    246 IF X(4) < 1 THEN 1670
    247 IF X(4) > 6 THEN 1670
    248 IF X(5) < 1 THEN 1670
    249 IF X(5) > 7 THEN 1670
    358 IF 2 * X(1) + X(1) * X(3) ^ 1.6 < 5 THEN 1670
    359 IF X(1) + X(2) < 1 THEN 1670
    361 IF X(2) + X(4) > 6 THEN 1670
    362 IF X(1) + X(2) + X(5) < 3 THEN 1670
    421 FOR J44 = 1 TO 2
        423 X(J44) = INT(X(J44))
        424 IF X(J44) < 0 THEN 1670
        426 IF X(J44) > 1 THEN 1670
    427 NEXT J44
    428 IF X(3) < 1 THEN 1670
    445 IF X(3) > 7 THEN 1670
    446 IF X(4) < 1 THEN 1670
    447 IF X(4) > 6 THEN 1670
    448 IF X(5) < 1 THEN 1670
    449 IF X(5) > 7 THEN 1670
    564 PD1 = -((ABS(X(5) ^ 1.8) * X(1) * X(3) ^ .3 * X(4) ^ 1.5 + X(2) * X(3) ^ 1.8 * X(4) ^ 1.3 * X(5) + X(1) * X(2) * X(3) ^ 1.7) / (X(1) * X(3) * X(4) + X(2) * X(3) ^ 2.3 * X(4) ^ 1.4))
    569 P = PD1
    1111 IF P <= M THEN 1670
    1452 M = P
    1454 FOR KLX = 1 TO 5
        1455 A(KLX) = X(KLX)
    1456 NEXT KLX
1670 NEXT i
1775 IF M < -9999999999 THEN 1999
1904 PRINT A(1), A(2), A(3), A(4), A(5), M, JJJJ

1999 NEXT JJJJ

This computer program was run with qb64v1000-win [103]. Its complete output of one run through JJJJ= -31999 is shown below:


1 1 6.99999999999984 4.999999999999148
1.00000000000937 -.3632313212589468 -32000
1 1 6.999999999999842 4.999999999999624
1.00000000000957 -.3632313212589473 -31999

Above there is no rounding by hand; it is just straight copying by hand from the monitor screen. On a personal computer with QB64v1000-win [103], the wall-clock time (not CPU time) for obtaining the output through JJJJ = -31999 was 2 seconds, counting from “Starting program…”. One can compare the computational results above with the those in Chang [18, Example 4].
The computational results presented above were obtained from the following computer system:
Processor: Intel (R) Core (TM) i5 CPU M 430 @2.27 GHz 2.26 GHz
Installed memory (RAM): 4.00GB (3.87 GB usable)
System type: 64-bit Operating System.

Acknowledgement
I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.
References
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Computer program for completely solving posynomial geometric programming problems

Computer program for completely solving posynomial geometric programming problems


Jsun Yui Wong


Similar to the computer program of the preceding paper, the computer program listed below aims to solve directly the following geometric programming problem in Tsai and Lin [92, Example 4, p. 489]:
Minimize
.4 * X(1) ^ .67 / X(7) ^ .67 + .4 * X(2) ^ .67 / X(8) ^ .67 + 10 – X(1) – X(2)
subject to
.0588 * X(5) * X(7) + .1 * X(1) < = 1
.0588 * X(6) * X(8) + .1 * X(1) + .1* X(2) < = 1
4 * X(3) * X(5) ^ -1 + 2 * X(3) ^ -.71 * X(5) ^ -1 + .0588 * X(3) ^ -1.3 * X(7) <= 1
4 * X(4) * X(6) ^ -1 + 2 * X(4) ^ -.71 * X(6) ^ -1 + .0588 * X(4) ^ -1.3 * X(8) <= 1
.1 <= X(i) <= 10, i=1,…, 8.

0 DEFDBL A-Z
1 REM DEFINT I, J, K
2 DIM B(99), N(99), A(2002), H(99), L(99), U(99), X(2002), D(111), P(111), PS(33), J(99), AA(99), HR(32), HHR(32), LHS(44), PLHS(44), LB(22), UB(22), PX(44), J44(44), PN(22), NN(22)
85 FOR JJJJ = -32000 TO 32000
89 RANDOMIZE JJJJ
90 M = -3D+30
95 PI = 3.1416
113 REM
115 FOR J44 = 1 TO 8
117 A(J44) = .1 + (RND * 7)
122 NEXT J44
128 FOR i = 1 TO 50000
129 FOR KKQQ = 1 TO 8
130 X(KKQQ) = A(KKQQ)
131 NEXT KKQQ
139 FOR IPP = 1 TO FIX(1 + RND * 8)
140 B = 1 + FIX(RND * 8)

        144 IF RND < .5 THEN 160 ELSE GOTO 167

        160 r = (1 - RND * 2) * A(B)

        164 X(B) = A(B) + (RND ^ (RND * 15)) * r

        165 GOTO 168

        167 IF RND < .5 THEN X(B) = A(B) - FIX(RND * 2) ELSE X(B) = A(B) + FIX(RND * 2)

    168 NEXT IPP
    171 FOR J44 = 1 TO 8
        172 IF X(J44) < .1 THEN 1670
        173 IF X(J44) > 10 THEN 1670

    174 NEXT J44

    175 X(1) = (1 - .0588 * X(5) * X(7)) / .1

    179 X(2) = (1 - .0588 * X(6) * X(8) - .1 * X(1)) / .1
    277 IF 4 * X(3) * X(5) ^ -1 + 2 * X(3) ^ -.71 * X(5) ^ -1 + .0588 * X(3) ^ -1.3 * X(7) > 1 THEN 1670

    278 IF 4 * X(4) * X(6) ^ -1 + 2 * X(4) ^ -.71 * X(6) ^ -1 + .0588 * X(4) ^ -1.3 * X(8) > 1 THEN 1670

    281 FOR J44 = 1 TO 8
        282 IF X(J44) < .1 THEN 1670
        283 IF X(J44) > 10 THEN 1670
    284 NEXT J44

    562 PD1 = -(.4 * X(1) ^ .67 / X(7) ^ .67 + .4 * X(2) ^ .67 / X(8) ^ .67 + 10 - X(1) - X(2))
    569 P = PD1
    1111 IF P <= M THEN 1670
    1452 M = P
    1454 FOR KLX = 1 TO 8

        1455 A(KLX) = X(KLX)

    1456 NEXT KLX

1670 NEXT i
1775 IF M < -99999999999999 THEN 1999
1904 PRINT A(1), A(2), A(3), A(4), A(5), A(6), A(7), A(8), M, JJJJ

1999 NEXT JJJJ

This computer program was run with qb64v1000-win [103]. Its complete output of one run through JJJJ= -31822 is shown below:


6.085618099703825 2.542584997406395 .6808899759257711
.5976964370312111 5.996229755306984 5.54084986984051
1.110216310414345 .4210523628845067 -3.95681469509836
-31885


6.346541989965907 2.310983975397095 .6710339922139241
.596726344128467 5.952666426052781 5.535124747033767
1.043795085753378 .4124783470777264 -3.952107188461668
-31822


Above there is no rounding by hand; it is just straight copying by hand from the monitor screen. On a personal computer with QB64v1000-win [103], the wall-clock time (not CPU time) for obtaining the output through JJJJ = -31822 was 53 seconds, counting from “Starting program…”. One can compare the computational results above with the those in Tsai and Lin [92, Example 4, Table 3].
The computational results presented above were obtained from the following computer system:
Processor: Intel (R) Core (TM) i5 CPU M 430 @2.27 GHz 2.26 GHz
Installed memory (RAM): 4.00GB (3.87 GB usable)
System type: 64-bit Operating System.

Acknowledgement
I would like to acknowledge the encouragement of Roberta Clark and Tom Clark.
References
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