Particle swarm optimizer is a well-known efficient population and control parameter-based algorithm for global optimization of different problems. This paper focuses on a new and primary sample for ...PSO, which is named phasor particle swarm optimization (PPSO) and is based on modeling the particle control parameters with a phase angle (
θ
), inspired from phasor theory in the mathematics. This phase angle (
θ
) converts PSO algorithm to a self-adaptive, trigonometric, balanced, and nonparametric meta-heuristic algorithm. The performance of PPSO is tested on real-parameter optimization problems including unimodal and multimodal standard test functions and traditional benchmark functions. The optimization results show good and efficient performance of PPSO algorithm in real-parameter global optimization, especially for high-dimensional optimization problems compared with other improved PSO algorithms taken from the literature. The phasor model can be used to expand different types of PSO and other algorithms. The source codes of the PPSO algorithms are publicly available at
https://github.com/ebrahimakbary/PPSO
.
Over the past decades, quite a few investigations have been carried out to utilize slags as a cementing agent in landfills, road construction, concrete, and mortars. However, a limited number of ...research studies investigated the use of magnesium slag as a soil stabilizer in geotechnical engineering projects. The manufacturing process of metallic magnesium produces a large volume of magnesium slag which is occasionally dumped in open areas. In this research, the potential use of magnesium slag as an additive agent to improve the properties of lime-stabilized soil was experimentally investigated. For this purpose, a number of different tests such as pH, Standard Proctor Compaction, Unconfined Compressive Strength, Indirect Tensile Strength, Toxicity Characteristic Leaching Procedure, X-ray diffraction, and Scanning Electron Microscopy were performed on the clayey sand containing 0%, 10%, 20%, 30%, 40% and 50% magnesium slag with 4% and 8% lime (by dry weight of the used soil). Samples were cured for 7, 28, and 56 days. The results of the study indicated that the addition of the maximum amount of magnesium slag (50%) at all curing days improved the geotechnical characteristics of soil samples containing 8% Lime. Generally, it was found that magnesium slag can be effectively applied in soil stabilization projects to improve the geotechnical properties and alleviate environmental repercussions.
This paper proposes a new, efficient and powerful heuristic-hybrid algorithm using hybrid DE (differential evolution) and PSO (particle swarm optimization) techniques DEPSO (differential evolution ...particle swarm optimization) designed to solve eight optimization problems with benchmark functions and the MAED (multi-area economic dispatch), RCMAED (reserve constrained MAED) and RCMAEED (reserve constrained multi area environmental/economic dispatch) problems with reserve sharing in power system operations. The proposed hybridizing sum-local search optimizer, entitled HSLSO, is a relatively simple but powerful technique. The HSLSO algorithm is used in this study for solving different MAED problems with non-smooth cost function. The effectiveness and efficiency of the HSLSO algorithm is first tested on a number of benchmark test functions. Experimental results showe the HSLSO has a better quality solution with the ability to converge for most of the tested functions.
•Solving multi-area economic dispatch with tie-line constraints.•A comparative study of proposed DEPSOs for MAED problem.•The HSLSO has a better quality solution with the ability to converge.
In this paper, we firstly derive a general expression for the entries of the mth (m∈ℕ) power for two certain types of tridiagonal matrices of arbitrary order. Secondly, we present a method for ...computing the positive integer powers of the anti-tridiagonal matrix corresponding to these matrices. Also, we give Maple 18 procedures in order to verify our calculations.
Sparse matrices appear frequently in mathematical models. In this paper, we firstly present a general expression for the entries of the r th r∈ℕ power of a certain n-square sparse matrix, in terms of ...the Chebyshev polynomials of the second kind. Secondly, we present a method for integer positive powers of the skew matrix corresponding to these sparse matrices. This method will be inspiring to calculate the positive integer powers of the similar matrices. Finally, we present some examples to illustrate our results. Also, we give maple 18 procedures in order to verify our calculations.
PurposeThe aim of this paper is to investigate the interaction effect that sponsor-team congruence and team fan (home/rival team) have on the influence of different types of sports sponsorship ...(joint, corporate social responsibility CSR-linked and conventional sponsorship) on fans' attitudes and purchase intentions toward the sponsor.Design/methodology/approachTwo experimental studies were conducted on 391 and 297 participants. The data gathered underwent analysis through five multivariate general linear model analyses.FindingsThe study found that CSR-linked sponsorship had the strongest positive impact and the weakest negative impact on the attitude and purchase intention of home team supporters and the attitude of rival team supporters. Nonetheless, the sponsor-team congruence did not significantly moderate the relationship. Additionally, the research demonstrated that the fan identity of both home and rival teams moderates the impact of sports sponsorships on attitude and purchase intention.Originality/valuePrevious research has studied the effectiveness of sponsorship format types independently. This is the first research comparing sponsorship formats regarding fan type and congruence.
Tridiagonal matrices appear frequently in mathematical models. In this paper, we derive the positive integer powers of special tridiagonal matrices of arbitrary order.
PurposeThe purpose of the study was to compare young adult responses to rational and emotional sports product advertisements. The moderating roles of product type and gender were also ...examined.Design/methodology/approachThe study utilized a 2 (advertising appeal: emotional vs rational) ×2 (gender: male vs female)×2 (sport product type: utilitarian vs hedonic) research design. Data were collected from 160 sport product users. The collected data were analyzed using three-way analysis of variance (ANOVA).FindingsThe results indicated that emotional advertising has a greater impact on the attitude toward advertising and the intention to purchase sports products. The results also revealed that rational advertising appeals have more impact for utilitarian sports products and that emotional advertising appeals are more effective for hedonic sports products. However, there were no significant effects for gender as a moderating variable.Originality/valueThis is the first study to examine responses to rational and emotional appeals in sports product advertisements.
Purpose The purpose of this study was to investigate the determinants of purchase intentions for utilitarian and hedonic counterfeit sporting goods among Muslim’ consumers. The moderating effect of ...income and status consumption was also examined. Design/methodology/approach Questionnaires were distributed among male undergraduate university students who were consumers of sports goods. A total of 360 valid and usable questionnaires were collected and analyzed through descriptive and inferential statistics. Findings The results showed that perceived risk, personal gratification, religiosity, information susceptibility and normative susceptibility all have a positive and significant effect on negative attitudes toward counterfeit sports goods. The effect of a negative attitude toward counterfeit goods was also negative and significant for the intention to purchase utilitarian and hedonistic goods. Income was not a moderator in the relationship between negative attitudes and the intention to purchase utilitarian and hedonic goods. However, the moderating effect of status consumption on the intention to purchase both utilitarian and hedonic goods was significant. Research limitations/implications The use of a male-only student sample potentially limits the generalization of the findings, but not the underlying relationships between the variables. Efforts to discourage or prevent the purchase of counterfeit sporting goods should highlight the risk and reduced personal gratification associated with purchasing counterfeit products, while also appealing to a person’s faith-based ethics. Originality/value This study produces a novel model explaining the purchase intentions for utilitarian and hedonic counterfeit sporting goods. This model can inform the development of anti-counterfeiting strategies in Muslim countries.
Prostate cancer is the most prevalent type of cancer and the second cause of death in men worldwide. Various diagnostic and treatment procedures are available for this type of malignancy, but ...High-grade or locally advanced prostate cancers showed the potential to develop to lethal phase that can be causing dead. Therefore, new approaches are needed to prolong patients' survival and to improve their quality of life. Precision medicine is a novel emerging field that plays an essential role in identifying new sub-classifications of diseases and in providing guidance in treatment that is based on individual multi-omics data. Multi-omics approaches include the use of genomics, transcriptomics, proteomics, metabolomics, epigenomics and phenomics data to unravel the complexity of a disease-associated biological network, to predict prognostic biomarkers, and to identify new targeted drugs for individual cancer patients. We review the impact of multi-omics data in the framework of systems biology in the era of precision medicine, emphasising the combination of molecular imaging modalities with highthroughput techniques and the new treatments that target metabolic pathways involved in prostate cancer.
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