The proposed algorithm considers the retrieval time of the document from servers in addition to the frequency of references to the document, the document size, and an ageing factor and maximizes a performance metric called Communication Delay Ratio (CDR .1 The new algorithm has been tested and compared to the existing policies such as, LRU, LFU, LNC-R-W3, and Greedy-Dual-Size Frequency.
Furthermore, the controller has a tuning parameter which can be used to maximize a suitable performance measure, e.g. the net present value (NPV).
Traditional cache replacement algorithms use the historical information about content requests to decide which item to keep in the cache to maximize a certain performance metric (e.g., hit rate, the amount of saved bandwidth) [101].
Based on factor graphs, a variant of the sum-product algorithm [5], namely the min-sum algorithm [12], can then be applied in order for all nodes, through iterative message passing with their respective neighbor nodes, to decide upon the best set of local parameters that can collectively maximize a global performance metric across the network.
The goal is to determine open service facilities and their service capacities, and to assign customers to primary and backup facilities in order to maximize an aggregated performance measure, which is a balanced sum of the customers' and the system owner's criteria.
"Because the A.D.A. is outcome neutral, we are not looking to maximize a student's performance so that they can do the best they can," says Susan Michaelson, ACT's manager of test accommodations.
Having a model involving all of these components, one may try to find the best configuration the configuration maximizing a given performance metric [38].
In relay networks, PC parameters on the direct (DeNB-UE), access, and relay links should be optimized jointly in order to find the optimum solution which maximizes a target performance metric.
Additional efforts could consider more refined methods of combining codes, and or different algorithms focused on maximizing a single performance measure such as specificity.
