Two reconfigurable control allocation (called also as control reallocation) schemes for Unmanned Aerial Vehicle (UAV) under stuck actuator failures have been proposed in this paper. The two control reallocation algorithms include a cascaded generalized inverse algorithm and a fixed-point algorithm. The performance of the two algorithms has been evaluated with a UAV model known as ALTAV (Almost-...

Swarm is a storage system that provides scalable, reliable, and cost-effective data storage. Swarm is based on storage servers, rather than file servers; the storage servers are optimized for cost-performance and aggregated to provide high-performance data access. Swarm uses a striped log abstraction to store data on the storage servers. This abstraction simplifies storage allocation, improves ...

This paper proposes a summarization system for summarizing multiple tamil documents. This system utilizes a combination of statistical, semantic and heuristic methods to extract key sentences from multiple documents thereby eliminating redundancies, and maintaining the coherency of the selected sentences to generate the summary. In this paper, Latent Dirichlet Allocation (LDA) is used for topic...

The optimal contract design for cloud computing service with resource guarantee under the consideration of resource redundancy and network externality is studied in this research. A model in which a service provider determines joint pricing and resource allocation decisions is constructed by proposing two types of contracts with different service-level agreements (SLAs). The SLA of each contrac...

This paper reported another recovery model to enhance system survivability. The model focuses on how to preserve the system and resume its critical service while incident occurs by reconfiguring the damaged critical service resources based on available resources without affecting the stability and functioning of the system. There are three critical requisite conditions in this recovery model: t...

in this paper, we study different methods of solving joint redundancy-availability optimization for series-parallel systems with multi-state components. we analyzed various effective factors on system availability in order to determine the optimum number and version of components in each sub-system and consider the effects of improving failure rates of each component in each sub-system and impr...

The trade-off between allocation to sexual and clonal reproduction in clonal plants is influenced by a variety of environmental factors; however, it has rarely been examined under field conditions. In this study, we investigated the trade-off between two modes of reproduction in Carex brevicuspis C. B. Clarke across a small-scale elevational gradient (21-27 m a.s.l.) at the Dongting Lake wetlan...