Economists know how to calculate optimal prices for electricity transmission. These are rarely applied in practice. This paper develops a thirteen node model, based on the transmission system in England and Wales, incorporating losses and transmission constraints. It is solved with optimal prices, and with uniform prices for demand and for generation, but re-dispatching to take account of trans...

generally ordering policies are done by two methods, including fix order quantity (foq) and fix order period (fop). these methods are static and either the quantity of ordering or the procedure of ordering is fixing in throughout time horizon. in real environments, demand is varying in any period and may be considered as uncertainty. when demand is variable in any period, the traditional and st...

Very long-running queries in database systems are not uncommon in non-traditional application domains such as image processing or data warehousing analysis. Query optimization, therefore, is important. However, estimates of the query characteristics before query execution are usually inaccurate. Further, system conngu-ration and resource availability may change during long evaluation period. As...

Person Re-Identification (ReID) has witnessed tremendous improvements with the help of deep convolutional neural networks (CNN). Nevertheless, because different fields have their characteristics, most existing methods encounter problem poor generalization ability to invisible people. To address this problem, based on relationship between temporal and camera position, we propose a robust effecti...

What: It can be difficult to re-find information in dynamic information environments. For example, people often use search engines not just to find new information, but also to return to previously found information. However, results change as search engines update to reflect the current state of the Web. These changes benefit users by providing new information, but hinder returning. To help pe...

A simulation model of a log transport logistics network was developed. The model could be structured to either share truck capacity among a group of loggers, or to assign a fixed number of trucks to individual loggers. Another variation of the model allowed the use of a staging yard to set out loaded trailers and deliver them to destinations using dedicated shuttle trucks that operated continuo...

We model small deviations from linear mechanical behaviour of a loaded vertically suspended helical spring. A Taylor expansion of the elasticity equations governing the axial extension of the spring is used to determine the relative magnitudes of linear and (quadratic and cubic) nonlinear terms in the force–extension relationship. This relationship is the basis for the derivation of a model for...

The evolution of a series of low-speed zonal centrifuge rotors for the separation of cells, bacteria, and subcellular particles visible in the light microscope {Rotors A-V, VI, IX, and XII) is described. All are dynamically loaded and unloaded and may be used for either rate-zonal or isopycnic-zonal separations. Transparent plastic end caps allow direct observation of the separations. The last ...

The building of a re-configurable business process (BP) has gained importance in organizations. It helps the organization to adapt agility goals. A proper context-driven BP should be capable integrating dynamic context information. However, this is absent existing studies. As result, providing suitable, expressive and stakeholders become challenging issue. prevailing research works lack conside...