In this article, the design of a fuzzy logic control system (FLCS) in combination with multi-objective optimization for diver’s buoyancy device (BCD) is presented. To either change or maintain depth, diver manually controls two pneumatic valves that are mounted on inflatable diving jacket. This task can be very difficult, especially specific circumstances such as poor visibility, safety stop pr...

A class of bipolar sequences is identified which has optimally flat spectrum using the Complex Reverse Jacket Transform (CRJT). This class is found to correspond exactly to the family of Bent bipolar sequences using the Walsh-Hadamard Transform. In total there are 576 such transforms for which this class has optimal spectrum of which the CRJT is one. The spectral properties of odd-power-of-two ...

in this paper, pile behavior embedded in layered soil deposits subjected to seismic loadings is analyzed using a nonlinear fiber element for simulation of soil – pile interactions. in the created model, both pile and surrounding soil are modeled using fiber elements in a practical beam on nonlinear winkler foundation (bnwf) concept. herein, the features of drain–3dx finite element software are ...

marine industry requires continued development of new technologies in order to produce oil. an essential requirement in design is to be able to compare experimental data from prototype structures with predicted information from a corresponding analytical finite element model. in this study, structural model updating may be defined as the fit of an existing analytical model in the light of measu...

the subjects of heat transfer and cooling system are very important topics in the internal combustion engines (ice). in modern cooling systems, low weight, small size and high compactness are the critical designing criteria that requires heat transfer enhancement. boiling phenomenon which is occurred in the water jacket of the ice is one of the methods to increase heat transfer in the coolant s...