it is well-known that severe deformation to metals causes a direct grain refinement of the matrix without special heat-treatments due to the mechanism of dynamic continuous recrystallization (dcr). however, the microstructural revolution during severe deformation is seemed to be different depending on the deformation mode, namely the direction of deformation. in general, multi-directional defor...

This paper presents an exact model for the resource investment problem with generalized precedence relations in which the minimum or maximum time lags between a pair of activities may vary depending on the chosen modes. All resources considered are renewable. The objective is to determine a mode and a start time for each activity so that all constraints are obeyed and the resource investment co...

The paper presents a multi-factor decision-making approach for prioritizing failure modes as an alternative to traditional approach of failure mode and effect analysis (FMEA). The approach is based on the ‘technique for order preference by similarity to ideal solution’ (TOPSIS). The priority ranking is formulated on the basis of six parameters (failure occurrence, non-detection, maintainability...

A microgrid is an eco-friendly power system because renewable sources are used as main power sources. In the islanded operation mode of a microgrid, maintaining the balance between power supply and power demand is a very important problem. In the case of surplus supply, decreased generation output and/or charge of distributed storages can be applied to solve the imbalance between power supply a...

A comparative s t u d y of arbitrari ly programmable, but fixed-rate videophone codecs using quar ter common intermediate format (QCIF) video sequences scanned a t 10 frames/s is offered. These codecs were designed t o allow direct replacement of mobile radio voice codecs i n second generation wireless systems, such as t h e Pan-European GSM, t h e American IS-54 a n d IS-95 a s well as t h e J...

With renewable power sources and new topology structures being widely introduced into the system, current local information-based generation-side protection cannot fully guarantee performance safety coordination with grid. This paper proposes an improved hierarchical system on generation-side. The proposed takes advantage of fusion multi-information provided by station layers. layer provides in...