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Full-Text Articles in Engineering
Assessment Of Surface Soil Moisture Using High-Resolution Multi-Spectral Imagery And Artificial Neural Networks, Leila Hassan-Esfahani, Alfonso Torres-Rua, Austin Jensen, Mac Mckee
Assessment Of Surface Soil Moisture Using High-Resolution Multi-Spectral Imagery And Artificial Neural Networks, Leila Hassan-Esfahani, Alfonso Torres-Rua, Austin Jensen, Mac Mckee
Leila Hassan-Esfahani
Many crop production management decisions can be informed using data from high-resolution aerial images that provide information about crop health as influenced by soil fertility and moisture. Surface soil moisture is a key component of soil water balance, which addresses water and energy exchanges at the surface/atmosphere interface; however, high-resolution remotely sensed data is rarely used to acquire soil moisture values. In this study, an artificial neural network (ANN) model was developed to quantify the effectiveness of using spectral images to estimate surface soil moisture. The model produces acceptable estimations of surface soil moisture (root mean square error (RMSE) = …
Energy Losses In Cross Junctions, Zac B. Sharp, Michael C. Johnson, S. L. Barfuss, W. J. Rahmeyer
Energy Losses In Cross Junctions, Zac B. Sharp, Michael C. Johnson, S. L. Barfuss, W. J. Rahmeyer
Zachary Sharp
Energy losses occurring in pipe junctions have been studied for many years. Head loss coefficients (KK) are commonly used to characterize losses across elbows, tees, crosses, valves, and other pipe fittings. When accurate values of KK are used, the flow rate and corresponding total head at any location in a pipe network can be calculated. While KK is well defined for most pipe junctions and fittings, the literature has limited documentations of KK for crosses. This study was commissioned to determine KK for a wide range of flow combinations in a pipe cross with equal diameter pipes and varied flow …
Effects Of Pipe Wall Offsets On Differential Pressure Meter Accuracy, Zac B. Sharp, Jesse M. Pope, S. L. Barfuss, Michael C. Johnson
Effects Of Pipe Wall Offsets On Differential Pressure Meter Accuracy, Zac B. Sharp, Jesse M. Pope, S. L. Barfuss, Michael C. Johnson
Zachary Sharp
Accurate flow measurement is essential for the management of any type of fluid system. This research investigated the effect on accuracy that five types of 12-in. differential-pressure flow meters have as a result of being installed in pipelines of differing inside diameter. The types of meters chosen for this research were the classical Venturi meter, Halmi Venturi Tube, wedge meter, V-cone meter, and the X-meter. Each meter was tested for accuracy with 10 pipe wall offsets varying from a 0.125-in. sudden contraction to a 0.937-in. sudden expansion of the pipe radius. The meters' reading during each test series was compared …