نتایج جستجو برای: lifetime testing

تعداد نتایج: 389779  

2012
Changxu Wu Jingyan Wan Guozhen Zhao

The electric vehicle (EV) has been developing rapidly and predicting the lifetime of Li-ion batteries in EVs has become an important issue. Characteristics of human drivers and the battery configuration interact and both play important roles in determining EV battery lifetime. Moreover, due to the relatively high cost of real EVs and long testing time for battery life of EVs, it is important to...

Due to the rapid development of technology in recent years, market competition and customer expectations have increased more than ever. In this situation, it is vital for businesses survival to determine the appropriate policy for inventory control, pricing, and routing, and decisions regarding each of them are often made separately. If the products have a perishable nature, it will be more imp...

2014
John K. Papadopoulos

If negotiations about value are essentially political (Graeber 2001:115), our understanding of past political systems is illuminated by an understanding of how and through what processes value is attributed to objects in a particular context. We cannot examine this “object value” through a focus on only one attribute or set of attributes, such as scarcity of raw material or labor investment, bu...

2014
Fabio Corubolo Anna Eggers Adil Hasan Mark Hedges Simon Waddington Jens Ludwig

When aiming to ensure the long-term usage of digital objects, it is important to carefully select what information to keep, considering also what lives outside of them. In the PERICLES project we start by analysing how such information has been described in related work, considering common definitions of metadata, context, significant properties and environment, and we come to the conclusion th...

2009
Jeremy E. Schaffer

The role of cold work reduction and its effect on fatigue properties are examined by means of rotary beam fatigue testing. In this study, processing parameters from the initial ingot to the final size before finish drawing were held constant. Fatigue specimens were prepared with between 20 and 55% cold work in five percent increments. These samples were subsequently heat treated, cut into test ...

2005
Yoram Halevy

A decision maker with time consistent preferences may exhibit diminishing impatience, when uncertain lifetime is accounted for. Uncertain lifetime captures not only the risk of mortality, but also the possibility that a promise for a delayed reward might be breached, or a postponed consumption might not be realized. The restrictions that time consistency imposes on additive intertemporal prefer...

2007
Luis de Marcos Carmen Pagés-Arévalo José-Javier Martínez José Antonio Gutiérrez de Mesa Juan-Manuel de Blas José María Gutiérrez

The learning objects paradigm actually drives the majority of researches and commercial developments in elearning field. Nevertheless, this paradigm has been harshly criticized due to the fact that it has not achieved the objectives proposed in its initial definition. This, together with some false assumptions surrounding the e-learning concept, have led costumers and organizations to the belie...

1995
Rabindra N. Mohapatra

Neutrinoless double beta decay is a sensitive probe of new physics beyond the standard model. In this review, we begin by describing the various mechanisms for this process and the kind of new physics scenarios where these mechanisms can arise. The present experimental lower bound on the lifetime for ββ0ν is then used to set limits on the parameters of these new physics scenarios. We then consi...

1998
Ali Hamie Franco Civello John Howse Stuart Kent Richard Mitchell

The Object Constraint Language (OCL), which forms part of the UML set of modelling notations, is a precise, textual language for expressing constraints that cannot be shown diagrammatically in UML. This paper reflects on a number of aspects of the syntax and semantics of the OCL, and makes proposals for clarification or extension. Specifically, the paper suggests that: the concept of flattening...

2004
Paul Martini

Despite many years of effort, observational studies have not found a strong correlation between the presence of any proposed fueling mechanism and low-luminosity AGN. After a discussion of the mass requirements for fueling, I summarize this observational work and provide a number of hypotheses for why the nature of AGN fueling has remained unresolved. In particular, I stress the potential impor...

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