Sharp JX-9400 Technické informace stáhnout pdf (Strana 77)

the points 8, 5 and 2 can be deleted (in that order) giving ﬁnally a design

having 12 points and a condition number of 4.8. Finally, deleting two more

points (3 and 15) gives the design C3, which has six points in the centre of

the faces and four points at opposite corners (see Figure 3.10).

The condition number of M

M calculated using the absolute value norm

M| for these designs and three models is given in Table 3.9.

There are numerous other possibilities that can be imagined or found in

the literature.

Table 3.7 Full factorial design for assessing the coeﬃcients of a linear model

with interactions

No x y z

1 1 1 1

211 1

3 111

4111

5 1 11

6111

7 111

8111

Table 3.8 3-D centred star design

No x y z

9100

10 0 1 0

11 0 0 1

12 100

13 0 10

14 0 0 1

15 0 0 0

Figure 3.10 Experimental designs C3 (left) and composite centred (right)

56 Ventilation and Airﬂow in Buildings

1 2 ... 72 73 74 75 76 77 78 79 80 81 82 ... 210 211

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Sharp JX-9400 Technické informace Strana 77