Carlsbad, Calif. Linear LLC has upgraded its standalone AK series of access entry keypads by adding new programming features. The new AK-11, AK-21W and AK-31 will replace the older AK-1, AK-2W and ...

Concave objective functions which are both piecewise linear and separable are often encountered in a wide variety of management science problems. Provided the constraints are linear, problems of this ...