A prephase synthesis method is proposed for sidelobe level (SLL) suppression of a 1 bit phase-only control metasurface under plane wave incidence. The array factor the with $N \times N$ unit cells shows that controlling number prephas...

This paper investigates a tabu assisted genetic algorithm based hyper-heuristic (hyper-TGA) for personnel scheduling problems. We recently introduced a hyper-heuristic genetic algorithm (hyper-GA) with an adaptive length chromosome which aims to evolve an ordering of low-level heuristics in order to find good quality solutions to given problems. The addition of a tabu method, the focus of this ...

A robust direct data domain least squares (D3LS) beamforming algorithm that is capable of reducing the sidelobe level of the beam pattern is presented. By exploiting the sparsity of the desired beam pattern, the proposed method can enhance the performance with its lower sidelobe level and deeper null for interference while the robustness against steering vector mismatch is increased when a prop...

The solutions used to solve bi-level congestion pricing problems are usually based on heuristic network optimization methods which may not be able to find the best solution for these type of problems. The application of meta-heuristic methods can be seen as viable alternative solutions but so far, it has not received enough attention by researchers in this field. Therefore, the objective of thi...

One of the most important factors that affects construction costs of highways is the earthwork cost. On the other hand, the earthwork cost strongly depends on the design of vertical alignment or project line. In this study, at first, the problem of vertical alignment optimization was formulated. To this end, station, elevation and vertical curve length in case of each point of vertical intersec...

This paper proposes a compact 4×4 filtering microstrip patch antenna array with Dolph-Chebyshev distribution implemented by multilayer structure. The proposed features good performance but contains no extra parts in the feeding or radiating element. whole consists of four 1×4 subarrays, each subarray is composed antennas which are coupled-fed single line. Inside desired passband, properly choos...

Sidelobes cancellation is challenging task in beamforming and beam steering in smart antenna systems. The high level of sidelobes can significantly degrade the system performance as well as antenna power efficiency. In this paper, we present the new decimal genetic algorithm to reduce the sidelobe and at the same time create the nulls toward interferers and jammers. This technique takes advanta...

Wireless Sensor Network (WSN) nodes inherently feature limited transmission range. A recent solution to the long range problem is Collaborative Beamforming (CBF). The outcome of an ideal CBF process ought be a radiation pattern whose main beam oriented towards intended destination (WSN sink), increasing Owing random and complex nature WSNs, development use improved metaheuristic algorithms in e...