نتایج جستجو برای: hover fly
تعداد نتایج: 33797 فیلتر نتایج به سال:
the total coal and lignite consumption of the thermic power plants in turkey is approximately 55 million tons and nearly 15 million tons of fly ash is produced. the remarkable increase in the production of fly ash and its disposal in an environmentally friendly manner is increasingly becoming a matter of global concern. studies for the utilization of fly ash in turkey are necessary to reduce en...
a survey was conducted on the fauna of the hover flies in northern iran in 2011. among the collected and identified material, the genus temnostoma le peletier & serville, 1828represented by a single species, t. vespiforme (linnaeus, 1758) is newly detected in iran. diagnostic characters and geographical distribution of the newly recorded species is briefly discussed.
Background and purpose: One of the most popular methods to control the synanthropic flies is using parasitoid wasps. The aim of this study was to estimate the experimental parasitism rates of pupae of Musca domestica, Lucilia sericata, and Sarcophaga heamorrhoidalis by parasitoid wasps, including Nasonia vitripennis, Spalangia nigroaenea, and Pachycrepoideus vindemmiae. Materials and methods: ...
Neural networks have recently been widely used to model some of the human activities in many areas of civil engineering applications. In the present paper, artificial neural networks (ANN) for predicting compressive strength of cubes and durability of concrete containing metakaolin with fly ash and silica fume with fly ash are developed at the age of 3, 7, 28, 56 and 90 days. For building these...
In this paper, a computational fluid dynamics simulation method is developed to study the influence of rotor overlapping azimuth on aerodynamic performance compound coaxial helicopter. The verified by comparing numerical results with wind tunnel experiment data NASA rotor. Two azimuths upper and lower blades are considered, isolated helicopter in hover forward analyzed respectively. State 1 mea...
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