نتایج جستجو برای: maintenance
تعداد نتایج: 145494 فیلتر نتایج به سال:
Introduction: The importance of medical equipments in preventive, diagnostic, treatment, and medical education and also need to their development are evident. Evidences show that with no control and managing for equipments maintenance, leads to poor and ineffective performances. Control and management of medical equipment to accede the rising lifetime of medical equipment, decrease of cost cont...
In industries, Preventive Maintenance (PM) is not a new practice to minimise the sudden breakdown of production machine. PM will be performed at predetermine intervals to provide a balance between failure cost and component utilisation (aging). However, most of PM interval is based on experience or original equipment manufacturer (OEM) recommendations. Consequently, the benefits from PM are not...
In real-world environments it is usually difficult to specify the quality of a preventive maintenance (PM) action precisely. This uncertainty makes it problematic to optimise maintenance policy. This problem is tackled in this paper by assuming that the quality of a PM action is a random variable following a probability distribution. Two frequently studied PM models, a failure rate PM model and...
introduction: activation of n-methyl-d-aspartate (nmda) glutamate receptors in the nucleus accumbens is a component of drug-induced reward mechanism. in addition, nmda receptors play a major role in brain reward system and activation of these receptors can change firing pattern of dopamine neurons. blockade of glutamatergic neurotransmission reduces the expression of conditioned place preferenc...
background and aims: mental disorders may negatively affect on the quality of life in hemodialysis patients and their response to treatment. the aim of present study was to examine the prevalence of depression and related risk factors in hemodialysis patients. methods: in this cross-sectional study, during june 2013 to september 2013, 217 patients with hemodialysis whom were admitted to kerman ...
in this paper we focus on a continuously deteriorating two units series equipment which its failure can not be measured by cost criterion. for these types of systems avoiding failure during the actual operation of the system is extremely important. in this paper we determine inspection periods and maintenance policy in such a way that failure probability is limited to a pre-specified value and ...
Most manufacturers use human-machine systems to produce high-quality products. Dealing with human-machine systems is very complicated since not only machines should be utilized in proper condition but also appropriate environment should be provided for human resources. Most manufacturers have a maintenance plan for machines but many of them do not have a proper work-rest schedule for human reso...
Public lighting networks are constructed and maintained to provide social security and traffic safety. Due to the expansion of cities, the development in public lighting is inevitable. In addition to new investment, the public lighting service and maintenance program imposes high costs on distribution companies. Since performance assessment methods focus on a combination of key performance indi...
This paper entertains the notion that software maintenance and innovation are more closely related than is commonly accepted. We consider perspectives where innovation projects are understood as attempts to engineer both the social and the technological, where processes of innovation imply the configuring of users, communities, and artifacts through the work of maintenance, manifest perhaps as ...
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