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-copter. ❑ Conducting a comparative study between SHO and PSO algorithms in terms of dynamic performance and robustness characteristics. The rest of the article is arranged as follows: Section 2 developed the mathematical model of Tri-copter. Section 3 presents the

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Abstract  

The influence of the concentration of nitric, hydrochloric and phosphoric acids, petroleum sulfoxides (PSO), salting-out agent, kind of diluent and temperature on the distribution ratio of U(VI) and Th(IV) has been systematically studied. It is found that the extraction regularity of PSO is similar to that of TBP. The distribution ratio in phosphoric acid is lower, but it increases with the increase of hydrochloric acid concentration and reaches a high value. The U(VI) exhibits the maximum distribution ratio at 3–4 mol/l HNO3. The distribution ratio of U(VI) and Th(IV) increases rapidly in the presence of a salting out agent. The extracted compounds are determined to be UO2(NO3)22PSO and Th(NO3)42PSO. The extraction enthalpies of U(VI) and Th(IV) with PSO were also calculated.

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The study was designed to explore the antioxidative effect of pomegranate seed oil (PSO) at different concentrations (5 and 7%) against oxidation of plant-based oils (canola oil and sunflower oil) during storage (60 days) as compared to artificial antioxidant butylated hydroxyanisole (BHA, 200 ppm). Rancimat and Schaal oven analysis were employed for the assessment of potential consequences of PSO against oxidation in plant based oils. The variation in total phenolic contents (TPC), antioxidant activity, peroxide value (POV), and tocopherol contents during storage were evaluated by Schaal oven test at 62 °C. The substantially (P≤0.05) higher induction period (IP) values were observed for PSO blended oil samples as compared to blank oil samples. The addition of PSO in plant-based oils improved the oxidative stability by enhancing the antioxidant potential and TPC, decreasing POV, and slowing down the degradation of tocopherol contents during storage. The findings of the present study suggest that PSO might be used as an alternative potential antioxidant to synthetic antioxidants.

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have gained popularity in optimization and AI for their ability to handle complex real-world challenges where traditional methods may struggle. The optimization technique known as Particle Swarm Optimization (PSO) draws inspiration from social behaviors

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Abstract  

An expression for rate constant for diffusion controlled reaction of positronium atom /Ps/ with acceptor in condensed phase was obtained, accounting the tunnelling of Ps. The obtained equation is good also for description of the reactions of solvated electron with electroneutral molecules. Owing to the tunnelling transfer existence, the rate constant /k/ is the sum of two terms — the first of them is proportional to the coefficient of relative diffusion of reagents and the second one /characterizing the subbarrier reaction/ does not include the diffusion coefficient. The correlation of the calculated and experimentally obtained rate constants for Ps+O2 reaction in liquids with different diffusion coefficients demonstrates good agreement between theoretical and experimental results. The possibility of electron tunnelling in liquid reaction of excited anthracene quenching with dissolved oxygen is also suggested.

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Abstract  

The extensive use of fossil fuels in energy production causes serious pollution of atmosphere with SO2, CO2, NOx, etc. In Estonia the electricity production is based mainly on the pulverized firing (PF) of low-grade local fuel – Estonian oil shale (EOS) which is characterized by a low calorific value (~9 MJ kg–1) and a high content of mineral matter (65–70%) from which approximately 50% are carbonates. Since 2004, also two boilers based on circulating fluidized bed combustion (CFBC) of EOS are in exploitation. The present study is focused on the comparative investigation of the efficiency of different ashes collected from different technological points of CFB and PF boilers as sorbents for SO2. The influence of experimental temperature on the SO2-binding characteristics of ashes as well as the possibilities of activation of ashes (grinding, hydration) were investigated. It was shown that the SO2-binding capacity of initial ashes at 700C and p(SO2)=190 mm Hg was for CFBC ashes 24–30 mg and for PF ashes 10–23 mg SO2 per 100 mg sample, the best binding capacities belonging to economizer ash (ECOA) and electrostatic precipitator ash from the 1st field (PESPA1f), respectively. However, during initial stage of binding the best results were obtained with air pre-heater ash (PHAA) and ESPA1f (both CFBC ashes). Grinding improved the SO2-binding ability, being the most effective in the case of bottom ash (BA) from CFBC and cyclone ash (PCA) from PF – increase in binding capacity 2 and 2.3 times, respectively. As compared to initial CFBC ashes, the binding characteristics of PF ashes remained lower even after grinding. Hydration and previous calcination improved the binding characteristics only of PF ashes. Hereby, the SO2-binding ability of CFBC ashes is better than of PF ashes and they are more promising sorbents for acidic gases, for example, for sulphur dioxide.

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Particle Swarm Optimization (PSO) algorithm, a heuristic optimization method, to estimate the parameters that define the impact zone on a beam. This method was specifically designed to accurately locate a non-punctual impact zone. To overcome these

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and complicated calculation [ 7 ]. This incorporation of Particle Swarm Optimization (PSO) not only improved the prediction accuracy of the neural network model but also contributed to a more robust and precise characterization of the asphalt foaming

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. In this section, a speech scrambling system using Particle Swarm Optimization (PSO) is introduced which is implemented using Matlab. To solve a practical optimization problem, the number of particles is often set between 10 and 50. At first, the

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] Kanović Ž. , Bugarski V. , Bačkalić T. Ship lock control system optimization using GA , PSO and ABC: A comparative review, Promet -Traffic&Transportation , Vol. 26 , No. 1 , 2014 , pp. 23 ‒ 31

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