in this paper, a stochastic two-stage model is offered for optimization of the day-ahead scheduling of the microgrid. system uncertainties including dispatchable distributed generation and energy storage contingencies are considered in the stochastic model. for handling uncertainties, monte carlo simulation is employed for generation several scenarios and then a reduction method is used to d...

The major digital preservation initiatives are about as old as the idea of the Semantic Web but the research areas only had little effect upon each other. This article identifies connections between the two research agendas. Three types of ageing processes are distinguished which affect digital records: media ageing, semantic ageing, and cultural ageing. It is argued that a period of 100 years ...

The hardening and microstructural evolution during ageing of a Al-1.2Cu-0.5Mg and a Al-1.2Cu-1.2Mg (at.%) alloy has been investigated. Artificial ageing at 150°C of stretched and naturally aged samples initially (up to about 48 h) leads to very limited further strengthening, but ageing at 190°C results a quick increase in strength. Detailed microstructural investigation using differential scann...

The identification and characterization of the molecular determinants governing ageing represents the key to counteracting age-related diseases and eventually prolonging our health span. A large number of fundamental insights into the ageing process have been provided by research into the budding yeast Saccharomyces cerevisiae, which couples a wide array of technical advantages with a high degr...

Convexity theory and duality theory are important issues in math- ematical programming. Within the framework of credibility theory, this paper rst introduces the concept of convex fuzzy variables and some basic criteria. Furthermore, a convexity theorem for fuzzy chance constrained programming is proved by adding some convexity conditions on the objective and constraint functions. Finally,...

Throughout the world governments are beginning to respond to the challenges of population ageing, often in rhetoric implying that ageing will bring about a ‘crisis’. These responses generally centre on the fi scal implications of retirement income support and health care services (OECD, 1998). The OECD notes the need for a broad and holistic approach to ageing, refl ecting the interdependence o...

This article argues that a strategy of active ageing, by linking the key policy domains of employment, pensions, retirement, health and citizenship, provides a sound basis for industrialized countries to respond to the challenges presented by population ageing. The article outlines the genesis of the concept of active ageing and the principles that should be embodied in a modernized, comprehens...

Performing speaker verification in the simultaneous presence of ageing progression and changing speech sample quality is an important, open problem. The issues of ageing and quality variation go hand in hand; the effect of ageing increases with time, while variations in quality are also more likely to be encountered as time passes. In this work we demonstrate the effect of ageing on speaker ver...

Cutaneous ageing is a complex biological phenomenon consisting of two components; intrinsic ageing, which is largely genetically determined and extrinsic ageing caused by environmental exposure, primarily UV light. In sun-exposed areas, these two processes are superimposed. The process of intrinsic skin ageing resembles that seen in most internal organs and is thought to involve decreased proli...

Railway track infrastructure asset management is a challenging problem with added values on safety, society and environment. With railways serving as key sustainable mode of transportation for passengers freight, the industry facing an increasing demand to expand its capacity, availability speed, resulting in faster deterioration ageing railway infrastructure. Given constrained maintenance budg...