3134884 documents found, page 313150 of 313489

CumuloNimbo: A Cloud Scalable Multi-tier SQL Database

Shunt capacitor placement in radial distribution networks considering switching...

This paper provides a new approach in decision making process for shunt capacitor placement in distribution networks. The main core of the evaluation process is a multi-objective framework to allocate the capacitor banks. The power loss and the total harmonic distortion (THD) are the objective functions of the system under study in a long-term planning horizon. In order to select the executive plan introduced b...

Verification Templates for the Analysis of User Interface Software Design

The paper describes templates for model-based analysis of usability and safety aspects of user interface software design. The templates crystallize general usability principles commonly addressed in user-centred safety requirements, such as the ability to undo user actions, the visibility of operational modes, and the predictability of user interface behavior. These requirements have standard forms across diffe...

Optimization models for an EV aggregator selling secondary reserve in the elect...

Power system regulators and operators are creating conditions for encouraging the participation of the demand-side into reserve markets. The electric vehicle (EV), when aggregated by a market agent, holds sufficient flexibility for offering reserve bids. Nevertheless, due to the stochastic nature of the drivers' behavior and market variables, forecasting and optimization algorithms are necessary for supporting ...

A simulation-optimization approach to integrate process design and planning dec...

Electrochemical behaviour of ZnO/flavonoid pairs

The last years are witnesses of continuous raise in the price of traditional fuels. This fact, joined to environmental concerns and the fears concerning the inevitable oil reserves depletion, has empowered the search for new energetic sources. Organic photovoltaic cells or Gratzel cells are a solution for collecting solar energy. Searching for new materials for this type of solar cells is normally a trial-and-e...

Lot sizing versus batching in the production and distribution planning of peris...

Joint production and distribution planning at the operational level has received a great deal of attention from researchers. In most industries these processes are decoupled by means of final goods inventory that allow for a separated planning of these tasks. However, for example, in the catering industry, an integrated planning framework tends to be more favorable due to the perishable nature of the products t...

A multi-population hybrid biased random key genetic algorithm for hop-constrain...

Genetic algorithms and other evolutionary algorithms have been successfully applied to solve constrained minimum spanning tree problems in a variety of communication network design problems. In this paper, we enlarge the application of these types of algorithms by presenting a multi-population hybrid genetic algorithm to another communication design problem. This new problem is modeled through a hop-constrained...

An Efficient Mechanism for Establishing IP Connectivity in Next Generation Netw...

The changes in the communication paradigm envisioned for next-generation networks (NGNs), with peer-to-peer/symmetric attachments gaining momentum and two Internet Protocol (IP) versions coexisting, will pose new challenges to mobile communication networks. Traditional IP auto-configuration mechanisms will not work properly, since they were designed mostly having in mind a client-server/asymmetric attachment mo...

A linear algebra approach to OLAP

Inspired by the relational algebra of data processing, this paper addresses the foundations of data analytical processing from a linear algebra perspective. The paper investigates, in particular, how aggregation operations such as cross tabulations and data cubes essential to quantitative analysis of data can be expressed solely in terms of matrix multiplication, transposition and the Khatri-Rao variant of the ...