Whether the design of knowledge base or the modeling of complex systems, when systems are characterized as complex systems with high dimension and a variety of variables and factors, to reduce complexity are necessary. Fuzzy cognitive maps (FCM) are a soft computing method for simulation and analysis of complex system, which combines the fuzzy logic with theories of neural networks. It is flexi...

Squall is a scalable online query engine that runs complex analytics in a cluster using skewresilient, adaptive operators. Online processing implies that results are incrementally built as the input arrives, and it is ubiquitous for many applications such as algorithmic trading, clickstream analysis and business intelligence (e.g., in order to reach a potential customer during the active sessio...

Web-scale search engines deal with a volume of data and queries that forces them to make use of an index partitioned across many machines. Two main methods of partitioning an index for distributed processing have been described in the literature. In document partitioning, each processor node holds the information for a subset of documents, while in term partitioning, each node holds the informa...

Optimal partitioning of a distribution arises in many contexts, including quantization in information theory, piecewise constant approximation of a function, stratified sampling, goodness-of-fit tests, principal points and clustering, and selective assembly in manufacturing. This article studies the behavior of optimal partitions, develops conditions under which the optimal partitioning of a di...

In this paper, the blocking probabilities of a hierarchical cellular system, with 36 macrocells and 27 microcells, under non-uniform traffic distribution have been simulated. Separated Autonomous Reuse Partitioning (SARP) and Hierarchical Autonomous Reuse Partitioning schemes (HARP) have been used to allocate channels to the users. It is found that at a GOS of 2% , HARP can accept more than dou...