全因子CCD

细履平沙

Central Composite Design with Full Factorial
This design is a central composite design in which the factorial portion is a full factorial design with all combinations of the factors at two levels. These designs are available for up to 7 factors（适用于少于7因素实验）. Of course, design points can be duplicated or deleted in the resulting Design Layout.

Choose the number of numeric factors you are studying. You may also want to include categorical factors.

Enter the numeric factor names, units, and low and high levels.

Choose the number of blocks.

The alpha location will default to the practical alpha. If blocking is specified, the alpha for orthogonality of blocks will be a choice. There usually isn't much difference. Alpha can be set to any location by selecting Other and entering a value. For a face-centered design, choose the alpha of 1.00.（默认情况，alpha值根据实验情况设定。alpha值对于正交分析和旋转分析差异不会很大，并且可以设定它为任意位置）

The default setting is for the factor low and high levels to be set to the coded units of +1 and -1.（默认情况，低水平为-1，高水平为+1） If you want the low and high levels to be set to +/-alpha, then click on the appropriate box（也可以设定高水平和低水平分别为 +/-alpha）. If set to +/- 1, axial points will be calculated at +/-alpha (outside the 'Low' and 'High' specifications if alpha > 1). If set to +/-alpha, the numbers you enter will be the extremes, and the +/- 1 values will be calculated so that all points will be set inside the range you indicate.（当第二种情况时，输入的这个值可以很极端，且+/-1位置的值要被计算，从而使所有的点在指定范围内）（因为没有用过这种情况，所以没有能好好的理解这句话的意思！）
请朋友们讨论分析。

monkey2007

呵呵，学习！