نتایج جستجو برای: lifetime testing

تعداد نتایج: 389779  

Journal: :E3S web of conferences 2021

Etalim has developed and lifetime tested a flexure-based thermoacoustic (TAC) genset operating at high pressure frequency. It is an efficient practical 1 kWe ready for deployment as or micro-cogeneration system when integrated with recuperated natural gas burner stroke controlling power electronics. maintenancefree, extreme reliability particularly suited remote applications. The fully costed d...

Journal: :Mathematics 2022

When the lifetime of an electronic component does not reach required level, it can be enhanced by means paralleling current sharing backup system or redundant system. The is sum lifetimes all components, which maximum components’ lifetimes, compared with parallel For purpose enhancing products’ reliability, goods are usually designed spare components. If assumed that there m−1 components for ea...

Journal: :Statistics, Optimization and Information Computing 2021

A new lifetime distribution is proposed and its properties are studied. The density function has a heavy right skew tails with different shapes. failure rate can be “constant”, “bathtub (U)”, “increasing-constant”, “decreasing-constant”, “upside down” down-U”. Complexity of the most integrals related to statistical solved numerically analyzed. Simple type copula presented. Numerical calculation...

Journal: :Europace : European pacing, arrhythmias, and cardiac electrophysiology : journal of the working groups on cardiac pacing, arrhythmias, and cardiac cellular electrophysiology of the European Society of Cardiology 2015
Zacharias Mandalenakis Lotta Von Koch Henry Eriksson Mikael Dellborg Kenneth Caidahl Lennart Welin Annika Rosengren Per-Olof Hansson

AIM This study aimed to estimate the prevalence, incidence rate, and lifetime risk of developing atrial fibrillation (AF) in a population-based study of Swedish men. METHODS AND RESULTS The study is a part of 'The Study of Men Born in 1913', which is a longitudinal prospective cohort study of 855 men born in 1913 and living in the city of Gothenburg in Sweden. They were followed from the age ...

2005
R. John Robertson Jane Barton John Robertson

The different purposes present within a distributed information environment create the potential for repositories to enhance their metadata by capitalising on the diversity of metadata available for any given object. This paper presents three conceptual reference models required to achieve this optimisation of metadata workflow: the ecology of repositories, the object lifecycle model, and the m...

Journal: :journal of arthropod-borne diseases 0
hadis mosayebian department of medical entomology and vector control, school of public health, tehran university of medical sciences, tehran, iran hamid reza basseri department of medical entomology and vector control, school of public health, tehran university of medical sciences, tehran, iran mojgan baniardalani department of medical entomology and vector control, school of public health, tehran university of medical sciences, tehran, iran hossein ladonni department of medical entomology and vector control, school of public health, tehran university of medical sciences, tehran, iran

background: the brown-banded cockroach, supella longipalpa , is not as common as the german cockroach in iran. this species seeks out areas that are very warm most of the time, and prefer warmer area than what german cock­roaches pre­fer. there is relationship between development of instars and diet of cockroaches. the aim of this study was to determine the effect of different diets on biology,...

Journal: :Symmetry 2021

With the high demands on quality of high-tech products for consumers, assuring lifetime performance is a very important task competitive manufacturing industries. The index CL frequently used to monitor larger-the-better products. This research related topic asymmetrical probability distributions and applications across disciplines. Chen distribution with bathtub shape or increasing failure rat...

2017
Marion Kerr Robert Pears Zofia Miedzybrodzka Kate Haralambos Moyra Cather Melanie Watson Steve E. Humphries

Aims Familial hypercholesterolaemia (FH) is a vastly under-diagnosed genetic disorder, associated with early development of coronary heart disease and premature mortality which can be substantially reduced by effective treatment. Patents have recently expired on high-intensity statins, reducing FH treatment costs. We build a model using UK data to estimate the cost effectiveness of DNA testing ...

Mashroor Ahmad Kha Navin Chandra

In this paper, we consider an  i.e., multiple step-stress accelerated life testing (ALT) experiment with unequal duration of time . It is assumed that the time to failure of a product follows Rayleigh distribution with a log-linear relationship between stress and lifetime and also we assume a generalized Khamis-Higgins model for the effect of changing stress levels. Taking into account that the...

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