Abstract Most of GA-based portfolio assets allocation uses normalization method to allocate investment asset’s weight. However, the normalization process will cause unease converging and even diverging characteristics, because it changes the gene’s relativity of address in chromosome. In this paper, we propose a weighed encoding scheme and crossover algorithm to allocate suitable assets in port...

Investigating nozzle’s orifice flow is challenging both experimentally and theoretically. This paper focuses on simulating flow inside diesel injector nozzle via Ansys fluent v15. Validation is performed with experimental results from Winkhofler et al (2001). Several important parameters such as mass flow rate, velocity profiles and pressure profiles are used for this validation. Results includ...

Vegetative filters (VF) are used to remove sediment and other pollutants from overland flow. When modeling the hydrology of VF, it is often assumed that overland flow is planar, but our research indicates that it can be two-dimensional with converging and diverging pathways. Our hypothesis is that flow convergence will negatively influence the sediment trapping capability of VF. The objectives ...

The effects of perturbation-based active flow control on supersonic rectangular twin jets (SRTJ) over a wide range nozzle pressure ratios (NPR = 2.77 to 6.7, corresponding fully expanded Mach numbers M j 1.3 1.9) were investigated. aspect ratio and design number for the bi-conic, converging-diverging nozzles 2 1.5, respectively. acoustic fields SRTJ are known couple, often generating high near-...