Meaningful laws of nature must be independent of the units employed to measure the variables. The principle of similitude (Rayleigh 1915) or dimensional homogeneity, states that only commensurable quantities (ones having the same dimension) may be compared, therefore, meaningful laws of nature must be homogeneous equations in their various units of measurement, a result which was formalized in ...

The lattice Boltzmann method (LBM) is an alternative to the conventional computational fluid dynamic (CFD) methods. It gained popularity due its simplicity in coding and dealing with a complex flow such as multiphase flow. based on kinetic theory, which mesoscopic scale. Hence, applying LBM for macroscopic problems requires proper conversion from physical scale (conventional units) (lattice vic...

Abstract In the present research, three different data-driven models (DDMs) are developed to predict discharge coefficient of streamlined weirs (Cdstw). Some machine-learning methods (MLMs) and intelligent optimization (IOMs) such as Random Forest (RF), Adaptive Neuro-Fuzzy Inference System (ANFIS), gene expression program (GEP) employed for prediction Cdstw. To identify input variables Cdstw b...

Sunflower threshing is one of the most interesting field processes for making sunflower ready seed handling, drying, cleaning and oil extraction. One biggest problems observed during process accumulation threshed crop on first third roller passing off some unthreshed parts heads. To solve aforementioned problem optimize efficiency process, this research was focused devising testing a machine wi...

Introduction: Hand and wrist stability are critical for optimal upper extremity function. Instability occurs when injury or a pathological condition alters balance, typically in the basketball players and handball players. Injury also can occur whenever the ligaments are subjected to tensile forces that exceed their physiological capacities. For example, thumb is stable in ext...

We present a new set of experiments in local scour due to confined twin propeller jets aiming include driving characteristics the analysis scouring action during in-port manoeuvres. The maximum depth is studied as function bed clearance, wall clearance and efflux velocity jet. Aiming reproduce more realistic manoeuvres, both forward backward rotation propellers are analysed showing different be...

The use of similarity transforms in the design and the interpretation of feed-forward neural networks is proposed. The method is based on the so-called Buckingham-Theorem or Pi-Theorem and is valid for all neural network function approximation problems which belong to the class of dimensionally homogeneous equations. The new design method allows the a priori determination of a minimal topology ...