In today’s society, investment wealth management has become a mainstream of the contemporary era. Investment wealth management refers to the use of funds by investors to arrange funds reasonably, for example, savings, bank financial products, bonds, stocks, commodity spots, real estate, gold, art...
The energy functions (18) and (19) allow us to interpret the mechanical behavior of the hypar pattern. Since the shape coefficient k appears in Eqs. (18) and (19) in its quadratic form (i.e., k2), we conclude that symmetry of system energy (with respect to k) exists for k <...
The hybridiza- tion coefficient, defining the proportion of feature subset evaluations to be accomplished by wrapper means, is denoted by λ∈ [0, 1]. In the following ⌈·⌉ denotes value rounding. www.intechopen.com Eficient Feature Subset Selection and Subset Size Optimization 89 Definition...
The integration of a leading-edge droop and a Gurney flap to improve rotor airfoil dynamic stall and post-stall was investigated [49]. The dynamic stall was delayed for a 20-degree leading-edge droop and 0.5 percent chord Gurney flap. Moreover, the maximum lift coefficient increased, but the...
However, the sole use of the droop nose wing cannot ensure as high levels of the maximum lift coefficient (CL,max) and the stall angle of attack (AoA) as those obtained by two- or three-elements slats. Research on high-lift devices has been carried out for several decades. Gillis and ...
The maximum lift coefficient and the lift coefficient of the reference airfoil at each angle of attack were implemented as constraints. Penalty functions applied constraints to the objective function to ensure that the optimum performance was obtained at each given angle of attack. The free-stream ...
Four fit indices were used to verify the accuracy of the presented models, namely the correlation coefficient (r), the mean absolute error (MAE), root mean squared error (RMSE), and mean absolute percentage error (MAPE). The values of the indices were calculated according to the following fo...