نتایج جستجو برای: we can providemany additional costs for maintenance
تعداد نتایج: 11633832 فیلتر نتایج به سال:
Electric power industry have always try to provide reliable electricity to customers and at the same time decrease system costs. High Voltage circuit-breakers are an essential part of the power network. This study has developed a maintenance and replacement scheduling model for high voltage circuit- breakers that minimize maintenance costs while maintaining the acceptable reliability. This mo...
We consider the class of polynomial differential equation x&= , 2(,)(,)(,)nnmnmPxyPxyPxy++++2(,)(,)(,)nnmnmyQxyQxyQxy++&=++. For where and are homogeneous polynomials of degree i. Inside this class of polynomial differential equation we consider a subclass of Darboux integrable systems. Moreover, under additional conditions we proved such Darboux integrable systems can have at most 1 limit cycle.
Abstract Background and objective: According to high prevalence of diabetes mellitus in societies and public attention to using complementary medicine in disease treatment, this survey be accomplished with the purpose validating effects of Tribulus terrestris Extract , Allium schoenoprasum extract and Walnut leaves aqueous extract on serum glucose of diabetic rates in comparison of Glibenclami...
testing plays a vital role in any language teaching program. it allows teachers and stakeholders, including program administrators, parents, admissions officers and prospective employers to be assured that the learners are progressing according to an accepted standard (douglas, 2010). the problems currently facing language testers have both practical and theoretical implications but the first i...
Maintenance is a source of large costs; in the EU the maintenance costs amount to between 4% and 8% of the total sales turnover. Opportunistic maintenance is an attempt to lower the maintenance cost by considering the failure of one component as an opportunity to replace yet non-failed components in order to prevent future failures. At the time of failure of one component, a decision is to be m...
abstract the variables affecting the nature of reading comprehension can be classified into two general categories: reader’s variables, and text variables (alderson, 2000). despite the wave of research on vocabulary knowledge as reader’s variable, the role of this knowledge in c-test as a text-dependent test and its interaction with lexical cohesion of the test as a text feature has remained a...
during centuries, humans have changed their environment into a perspective of cultural heritage using tact and wisdom. these perspectives that show the legacy of human civilization, have established a long cultural relationship via safety international pathways. hence, investing for maintenance of critical infrastructures which is the safe way, seems to be necessary. the main problem is not the...
abstract amino acids are building blocks of proteins, and play a vital role in living beings existence and their functionality. the interaction of these compounds with metal ions is of great importance to biochemists, and chemists, because their functions can be utilized as a model in understanding enzymes mechanism for transport of metal ions to tissues. among twenty essential amino acids w...
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