In the process of iterative operation of 0.618 method, the iterative interval keeps shrinking, and the reduction rate of the interval is ()in the process of iteration.
A. getting smaller
B. getting bigger
C. constant
D. not sure
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The principle to select the inner point in golden section method is that each discarded interval is () times of the original interval.
A. 0.618
B. 0.5
C. 0.382
D. 0.75
Gradient method and Newton method can be regarded as a special case of ().
A. coordinate transformation method
B. conjugate method
C. variable scale method
D. compound method
What direction does the function have which is the gradient direction?()
A. The steepest descent method
B. The fastest rise
C. The minimum change
D. The maximum rate of change
Optimal step size is the basic element of mathematical model of optimization design problem.()