نتایج جستجو برای: changing diameter
تعداد نتایج: 257495 فیلتر نتایج به سال:
Vertically aligned single-walled carbon nanotube arrays were synthesized from dip-coated binary Co/Mo catalyst by no-flow chemical vapor deposition from either pure ethanol or acetonitrile as carbon feedstock. By changing to acetonitrile the mean diameter was reduced from 2.1 nm to less than 1.0 nm despite using identically prepared catalyst. The demonstrated diameter control on flat substrates...
We report here on the control of remote surface-plasmon-mediated two-photon-induced luminescence of dendritic silver nanoparticle aggregates as observed by femtosecond laser microscopy. With a focal spot diameter approximately 1 microm, polarized remote emission has been observed 99 microm from the focal spot. We show control over the regions of emission by changing the polarization of the inci...
to determine the droplet characteristics of agricultural spray nozzles through water sensitive paper (wsp), the non-circular and overlapped spots appearing on the water sensitive paper surfaces are eliminated. in the conventional approach, the procedure is done according to the subjective self determined estimation of the operator. the objective of this study was to develop a practical alternat...
تولید انبوه مرکبات در ایران، لزوم درجه بندی کیفی این محصولات را برای ورود به بازارهای جهانی تقاضا می کند. به همین منظور، در تحقیق حاضر، یک دستگاه سورتر (sorter) روباتیکی طراحی و ساخته شد تا بتواند میوه ها را بر اساس اندازه به سه قسمت کوچک، متوسط و بزرگ تقسیم نماید. دستگاه شامل بخش های نرم افزاری و سخت افزاری می باشد. قسمت سخت افزاری دستگاه از دو واحد تشکیل شده است. واحد اول، واحد تصویر برداری م...
Background and aims: Extensive industrial and production activities are one of the major sources of dust. In many cases, cyclones are used as the control measure. The removal efficiency of dust in cyclones depends on different factors. Some of these factors are, the design parameters, e.g. cyclone diameter, particle density, operating temperature and fluid physical properties, density of gas ...
Electrospinning is a unique way to producing novel polymer nano fibres with diameter typically in the range from 10 nm to 1500nm. Large length to diameter ratio and small mass to volume ratio of these nanosizes fibres widens the areas of their application to many industrial uses. Nylon 6 nanofibres with diameter ranging from 150nm to 1300 nm were produced by the electrospinning process. The fib...
The dependence of the resistivity with changing diameter of heavily-doped self-seeded germanium nanowires was studied for the diameter range 40 to 11 nm. The experimental data reveal an initial strong reduction of the resistivity with diameter decrease. At about 20 nm a region of slowly varying resistivity emerges with a peak feature around 14 nm. For diameters above 20 nm, nanowires were found...
Tension leg platforms are compliant structures for oil extraction in deep water consisting of hull, deck foundation, tendons and risers. The hull is very important part of a TLP from functionality, weight and cost point of views that is made of vertical column and horizontal pontoon with circular and rectangular sections. The hull geometry plays very important rule in optimum action of the stru...
in the area of automotive engineering there is a tendency to more electrification of power train. in this work control of an induction machine for the application of electric vehicle is investigated. through the changing operating point of the machine, adapting the rotor magnetization current seems to be useful to increase the machines efficiency. in the literature there are many approaches wh...
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