نتایج جستجو برای: airship
تعداد نتایج: 298 فیلتر نتایج به سال:
SDL is a system design language for the development of distributed systems, including real-time systems. In this paper, we apply SDL to capture design solutions found in safety-critical real-time systems. In particular, we present a methodology to augment system safety step-by-step, and systematically define and apply reusable design solutions for safety-critical real-time systems, expressed as...
The normalized radar backscatter (σ) in scatterometer measurements over water is theorized to go to zero below a threshold wind speed due to insufficient friction between the wind and water to create capillary waves from which the radar signal scatters. Evidence of the threshold wind speed and a hysteresis effect have been observed in airship and wave tank data. The threshold wind speed is addi...
Gaseous nitrous acid (HONO) is an important precursor of tropospheric hydroxyl radicals (OH). OH is responsible for atmospheric self-cleansing and controls the concentrations of greenhouse gases like methane and ozone. Due to lack of measurements, vertical distributions of HONO and its sources in the troposphere remain unclear. Here, we present a set of observations of HONO and its budget made ...
Blimps robot with helium gas have main advantages, there will be no need of driving force. In this project we are going to present a low weight , embedded system based blimp unmanned Airship. Advantages of this project could be less energy consumption low noise and cost efficiency which could made them ideal for exploration of areas without Disturbing environment. In this project we are going t...
Rotorcraft UAV (RUAV) has similar mechanical structure with helicopter. It can be operated in different flight modes which the fixed-wing UAV is unable to achieve, such as vertical take-off/landing, hovering, lateral flight, pirouette, and bank-to-turn. For these advantages, RUAV can be used in many fields where human intervention is considered difficult or dangerous (Napolitano et al., 1998). ...
Exhausts of airship fabric bag in the stratosphere such as hydrogen which can be used for fuels by using catalytic combustion method. This can save the extra fuels used in the power system. Pd/γAl2O3 catalyst was prepared in this work by impregnation method and the H2 catalytic combustion reaction kinetic was investigated between the pressure of 3.6 kPa and 101.3 kPa. The effects of temperature...
Ultra-wideband synthetic aperture radar (UWB SAR) is a sufficient approach to detect landmines over large areas from a safe standoff distance. Feature extraction is the key step of landmine detection processing. On the one hand, the feature vector should contain more scattering characteristics to discriminate landmines from clutters; on the other hand, the dimensionality of feature vector shoul...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید