The unequal area facility layout problem (UA-FLP) refers to the reasonable arrangement of a certain number facilities in given area. should satisfy constraints and optimize optimization objectives as far possible. In this paper, method combining improved lowest horizontal line particle swarm algorithm is proposed solve UA-FLP, which achieves multi-objective material handling cost, adjacent valu...

The unequal-areas facility layout problem is concerned with finding the optimal arrangement of a given number of non-overlapping indivisible departments with unequal area requirements within a facility. We present a convex-optimisation-based framework for efficiently finding competitive solutions for this problem. The framework is based on the combination of two mathematical programming models....

A method of construction of A-optimal binary block designs for multiple asymmetrical parallel line assays has been proposed. Illustration of the method with examples has been provided. By this method two series of designs are obtained. The first series of designs have equal replication of treatments with unequal block sizes. The second series of designs have equal block sizes with unequal repli...

A novel double-layer collagen membrane with unequal pore sizes in each layer was designed and tested in this study. The inner, loose layer has about 100-μm-diameter pores, while the outer, compact layer has about 10-μm-diameter pores. In a rat model of incomplete spinal cord injury, a large number of neural stem cells were seeded into the loose layer, which was then adhered to the injured side,...

This article obtains some sufficient conditions to establish the A-optimality of block designs with unequal block sizes for making test treatments control comparisons under a suitable heteroscedastic model. Balanced test treatments incomplete block designs with unequal block sizes of type G are defined. Some general methods of constructing these designs are given and their A-efficiencies are in...