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Found 6319 publications

Data-driven terminal voltage prediction of li-ion batteries under dynamic loads

Adrienn Dineva Szabolcs Kocsis Szurke Istvan Vajda

Publication Name: 2020 21st International Symposium on Electrical Apparatus and Technologies Siela 2020 Proceedings

Publication Date: 2020-06-01

Volume: Unknown

Issue: Unknown

Page Range: Unknown

Description:

Extensive investigation and prediction of the effects of dynamic battery loading is key to on-board Battery Management Systems (BMS) of Electric Vehicles (EVs) in order to ensure reliable operation and efficient energy management. In this paper, measurements of WLTP discharge tests at different temperatures are conducted on a Lithium Nickel Manganese Cobalt Oxide (LiNiMnCoO2) cell. Terminal voltage, discharge rate and temperatures at four points are taken into consideration. After, historical measurement data is used to build ensemble of boosted tree models and then predict cell voltage outcome sequence into the future. The efficiency of the performance is compared in case of various measurement sets. The results support the efficiency and applicability of direct multi-step-ahead forecasting strategy with standard Machine Learning techniques in battery SoC prediction.

Open Access: Yes

DOI: 10.1109/SIELA49118.2020.9167039

Optimization of the time-dependent traveling salesman problem using interval-valued intuitionistic fuzzy sets

Peter Foldesi Boldizsar Tuu-Szabo Ruba Almahasneh Ĺaszĺo T. Ḱoczy

Publication Name: Axioms

Publication Date: 2020-06-01

Volume: 9

Issue: 2

Page Range: Unknown

Description:

This study proposes a new model and approach for solving a realistic extension of the Time-Dependent Traveling Salesman Problem, by using the concept of distance between interval-valued intuitionistic fuzzy sets. For this purpose, we developed an interval-valued fuzzy degree repository based on the relations between rush hour periods and traffic regions in the "city center areas", and then we utilized the interval-valued intuitionistic fuzzy weighted arithmetic average to aggregate fuzzy information to be able to quantify the delay in any given trip between two nodes (cities). The proposed method is illustrated by a simple numerical example.

Open Access: Yes

DOI: 10.3390/AXIOMS9020053

Penal sanctioning of Zoophilia in light of the legal status of animals—a comparative analysis of fifteen European countries

László Ózsvári Szilvia Vetter Anita Boros

Publication Name: Animals

Publication Date: 2020-06-01

Volume: 10

Issue: 6

Page Range: 1-14

Description:

The criminal legislation regarding zoophilia and the legal status of animals were examined in 15 European countries. With regard to zoophilia, answers to the following questions were sought: are sexual acts performed with animals and the possession and distribution of animal pornography criminally punishable? Several aspects of the legal status of animals were examined including: (1) is the protection of individual animals included in the constitution, (2) do animals have a special status beyond mere objects, (3) can we find specific legislative provisions that explicitly state that animals are not simply things, and (4) does the legal system also take the “dignity” of animals into consideration. The assessment of zoophilia and the legal status of animals resulted in two country rankings, which the authors compared with each other. The correlation was not significant (p = 0.3147). At the same time, countries with differentiated criminal legislation for zoophilia were also 3.62 times more likely to rank higher in terms of the legal status of animals. The Swiss regulations are exceptional in both respects, while at the other end of the list, Italy does not have specific legislative provisions for either aspect.

Open Access: Yes

DOI: 10.3390/ani10061024

Conventional and nonconventional extraction techniques for optimal extraction processes of rosmarinic acid from six Lamiaceae plants as determined by HPLC-DAD measurement

E. Lakatos V. Kapcsándi Beatrix Sik Zsolt Ajtony

Publication Name: Journal of Pharmaceutical and Biomedical Analysis

Publication Date: 2020-05-30

Volume: 184

Issue: Unknown

Page Range: Unknown

Description:

The goal of this study was to improve the extraction efficiency of rosmarinic acid (RA) from Lamiaceae herbs (lemon balm, peppermint, oregano, rosemary, sage, and thyme) using various extraction techniques (maceration with stirring, MACS; heat reflux, HRE; and microwave-assisted extraction, MAE) and extraction conditions (solvent acidity, solvent type, extraction time and temperature). The RA content was measured by high-performance liquid chromatography with diode-array detection (HPLC-DAD) under test conditions. Our results showed that extraction with acidified aqueous ethanol (EtOH-H2O-HCl, 70:29:1, v/v/v) was the best choice for the recovery of RA compared to other solvent systems. Further study suggested the following optimal extraction times for the different techniques: 120 min at 25 °C with MACS, 15 min at boiling point with HRE, and 5 min at 50 °C and 80 °C with MAE. Based on our results, we demonstrated that by careful adjustment of the extraction conditions, it is possible to set up a single extraction protocol to extract RA from different plants.

Open Access: Yes

DOI: 10.1016/j.jpba.2020.113173

Metallographic and magnetic analysis of direct laser sintered soft magnetic composites

Imre Fekete L. K. Varga B. Kocsis

Publication Name: Journal of Magnetism and Magnetic Materials

Publication Date: 2020-05-01

Volume: 501

Issue: Unknown

Page Range: Unknown

Description:

In this present study, soft magnetic composite samples were made from iron-silicon alloys. For the purpose of optimizing 3D printing parameters, preliminary experiments were performed. Metallographic and computed tomography investigations were used to determine the appropriate sintering settings. Besides the microscopic and CT analysis, considering the permeability spectra have been compared to the samples.

Open Access: Yes

DOI: 10.1016/j.jmmm.2020.166425

Supporting the sustainable development of railway transport in developing countries

Daniel Rohacs Anita Boros Agnes Wanjiku Wangai

Publication Name: Sustainability Switzerland

Publication Date: 2020-05-01

Volume: 12

Issue: 9

Page Range: Unknown

Description:

Generally, the development process of the railway transport system is determined by the market pull effects initiated by the economy and society and the market push effects induced by technological progress. The policymakers can provide a balance between these two effects; this results in more effective, safer, and greener future railway systems. In developing countries, the railway systems lag compared to the developed economies. Therefore, the supporting management tools and legal supports for policymakers and strategic management play significant roles in the development of future sustainable transport systems. This paper deals with such required tools and the potential legal framework that support the development of sustainable railway systems in developing countries. The major novelty and advantages of the introduced methodology is the harmonised interaction between society, economic demands, technological development, and regulation. The proposed tools are applied to the Kenya rail system development.

Open Access: Yes

DOI: 10.3390/SU12093572

Fuzzy control of self-balancing robots: A control laboratory project

Péter Odry Akos Odry Imre J. Rudas Robert Fuller

Publication Name: Computer Applications in Engineering Education

Publication Date: 2020-05-01

Volume: 28

Issue: 3

Page Range: 512-535

Description:

This paper presents a novel control laboratory project that provides hands-on experience in feedback control concepts (embedded control systems) through dedicated assignments, with a particular focus on the design and implementation of fuzzy control. The project is structured around an inexpensive, portable self-balancing robot (SBR), whose embedded system is realized using commercially available breakout boards as the first assignment. For the stabilization of the plant, students are guided to execute the essential stages of control system design, from system modeling and parameter optimization, over basic or advanced control strategy design in the MATLAB/Simulink environment, to both implementation and validation of the closed loop on the real robot. To demonstrate and foster the application of fuzzy logic, the second part of the paper introduces a simple control strategy based on fuzzy logic controllers. Then, a lookup table-based implementation technique is described for the demonstration of manual interfacing and embedded coding of fuzzy control strategies. The proposed methods are clear and straightforward; they highly foster the understanding of feedback control techniques and allow students to gain vast knowledge in the practical implementations of control systems.

Open Access: Yes

DOI: 10.1002/cae.22219

Dissipation-Induced Luttinger Liquid Correlations in a One-Dimensional Fermi Gas

Ádám Bácsi Balázs Dóra Balázs Dóra Cǎtǎlin Paşcu Moca

Publication Name: Physical Review Letters

Publication Date: 2020-04-03

Volume: 124

Issue: 13

Page Range: Unknown

Description:

We study a one-dimensional Fermi gas in the presence of dissipative coupling to environment through the Lindblad equation. The dissipation involves energy exchange with the environment and favours the relaxation of electrons to excitations. After switching on the dissipation, the system approaches a steady state, which is described by a generalized Gibbs ensemble. The fermionic single particle density matrix resembles deceivingly to that in a hermitian interaction quench. It decays inversely with the distance for short times due to the fermionic correlations in the initial state, which changes into a noninteger power law decay for late times, representing dissipation-induced Luttinger liquid behavior. However, the crossover between the two regions occurs due to dissipation-induced damping, and is unrelated to the propagation of excitations. The velocity of information spreading is set by the dissipative coupling, and differs significantly from the original sound velocity. The thermodynamic entropy grows as -t ln t initially, and saturates to an extensive value. Our results can be tested experimentally in one-dimensional Dirac systems.

Open Access: Yes

DOI: 10.1103/PhysRevLett.124.136401

Princes of Igboland: inchoate feudalization, feudal masculinity and postcolonial patriarchy in Ifeoma Okoye’s radical feminist narratives

Adam Mayer

Publication Name: African Identities

Publication Date: 2020-04-02

Volume: 18

Issue: 1-2

Page Range: 95-108

Description:

Space for emancipatory projects during military rule in Nigeria shrinks considerably (1983–1999, with short interruptions). This affects anti-feudalist initiatives and radical feminist movements equally. Ifeoma Okoye, the preeminent socialist-feminist writer of Igboland, publishes novels and short stories in these years that deal with women’s lives and that attack post-colonial patriarchy. Her novel Men Without Ears also uncovers the mechanisms by which processes of feudalization come to characterize ethnic Igbo regions that hitherto had had no traditional rulers. Okoye in the novel weaves a narrative around a particularly toxic kind of masculinity, feudal masculinity, which imprints the newly instituted faux Igbo royal and faux Igbo feudatory. In Okoye’s world, Nigerian mainstream academic feminists, criminal uncles who try to disinherit orphans, and Igbo royalty with invented ranks but with very real thugs in their employ, all represent the comprador class that directs the developmental failure of Nigeria under military rule and beyond.

Open Access: Yes

DOI: 10.1080/14725843.2020.1773239