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Ellipticity-dependent ionization yield for noble atoms

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Chinese Physics B 2019年第8期28卷 73-78页

作者： Hristina Deliba?ic violeta Petrovi Faculty of Science University of Kragujevac

The photoionization in the frame of the Ammosov-Delone-Krainov theory has been theoretically examined for noble gases,argon,krypton,and xenon,in an elliptically polarized laser *** consider the intermediate range of the Keldysh parameter,γ~1,and analyze the influence of shifted ionization potential and temporal profile to eliminate disagreement between theoretical and experimental *** including these effects in the ionization rates,we solve rate equations in order to determine an expression for the ionization *** use of modified ionization potential shows that the ionization yields will actually decrease below the values predicted by original(uncorrected)*** paper will discuss the causes of this discrepancy.

关键词： elliptical polarization ponderomotive potential Stark effect Gaussian laser pulse

Application of heterogeneous catalysis to biodiesel synthesis using microalgae oil

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Frontiers of Environmental Science & Engineering 2021年第5期15卷 45-65页

作者： violeta Makareviciene Egle Sendzikiene Ieva Gaide Agriculture Academy Vytautas Magnus UniversityK.Donelaicio str.58LT-44248KaunasLithuania

Recently,there is a growing interest in the use of microalga in various *** have properties such as rapid reproduction and high biomass accumulation,and under certain conditions,some are able to accumulate a large amount of ***,microalgae oil often contains more free fatty acids than the vegetable oil and is therefore unsuitable for biodiesel synthesis using alkaline *** this reason,some authors suggest the application of heterogeneous catalysis.A particular interest in the use of immobilized enzymes has *** solid substances can also be used as heterogeneous catalysts are usually metal oxides,carbonates or *** use of these catalysts results in simpler biodiesel synthesis,especially purification processes,a cleaner end product and a less polluted *** molar ratio of alcohol to oil is lower during enzymatic transesterification,and more than 90%ester yield is obtained using a molar ratio of alcohol to oil of 3:1 to 4.5:*** alcohols do not have a negative effect on the effectiveness of chemical catalysts,so it is possible to use alcohols in molar ratio from 4:1 to 12:*** optimal temperature of enzymatic process is 30℃–50℃.An ester yield of more than 95%was obtained in 12–48 *** chemical catalysts,greater than a 95%yield of esters was obtained at higher temperatures in a shorter *** costs of enzymatic catalysis can be reduced by reusing the catalysts directly or after regeneration.

关键词： Biodiesel Heterogeneous catalysis Transesterification Microalgae oil

Filling of dolines with aeolian sediments in the high-mountain karst of the Dinarides(***,Montenegro)

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Journal of Mountain Science 2022年第7期19卷 1886-1900页

作者： DJUROVic Mirela GAJic violeta DJUROVic Predrag University of Belgrade Faculty of PhilosophyDepartment of ArcheologyCika Ljubina 18-20Belgrade11000Serbia University of Belgrade Faculty of Mining and GeologyDepartment of MineralogyCrystallographyPetrology and GeochemistryDjusina 7Belgrade11000Serbia University of Belgrade Faculty of GeographyStudentski trg 3/ⅢBelgrade11000Serbia

Filling of dolines with aeolian sediments,one of the less frequently described ways in which they are filled,is analysed in the present study on an example of a doline in the high-mountain karst of the *** is a series of deep dolines on a broad ridge(about 2450 m a.s.l.)on ***(Montenegro)in the southeastern part of the *** accumulation of very fine-grained sand that almost completely fills one of the dolines was *** than 99% of the accumulation was found to be composed of well-sorted quartz grains with an average size of 89μm and no vertical differences in granulometric or textural *** respect to mineral composition,the accumulation differs significantly from that prevalent in this part of the Dinarides,in which different kinds of carbonate rocks are *** conducted analyses indicated an aeolian origin of the *** aridification that began in the Middle Holocene made the area of North Africa a source of sediments that were transported by the aeolian process to neighbouring ***-sedimentological research on *** and earlier investigations of the wider Mediterranean region indicate that dolines in highmountain karst can be filled with aeolian *** sediments originated from territory of the northern Sahara,and the filling occurred in the late Holocene,at the close of the African humid *** present study shows that apart from the influence of local factors,regional geomorphological processes such as aeolian transport can also exert significant influence on the filling of *** also indicates a high intensity and strongly expressed dynamics of aeolian sediment transport from the territory of Africa to this part of Southern Europe.

关键词： Doline Filling Aeolian sediments Karst Dinarides Montenegro

Multi-layer photovoltaic fault detection algorithm

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High Voltage 2017年第4期2卷 244-252页

作者： Mahmoud Dhimish violeta Holmes Bruce Mehrdadi Mark Dales Department of Computing and Engineering University of HuddersfieldHD1 3DH HuddersfieldUK

This study proposes a fault detection algorithm based on the analysis of the theoretical curves which describe the behaviour of an existing grid-connected photovoltaic(GCPV)*** a given set of working conditions,a number of attributes such as voltage ratio(VR)and power ratio(PR)are simulated using virtual instrumentation labVIEW ***,a third-order polynomial function is used to generate two detection limits(high and low limits)for the VR and PR *** high and low detection limits are compared with real-time long-term data measurements from a 1.1 kWp GCPV system installed at the University of Huddersfield,United ***,samples that lie out of the detecting limits are processed by a fuzzy logic classification system which consists of two inputs(VR and PR)and one output membership *** obtained results show that the fault detection algorithm accurately detects different faults occurring in the PV *** maximum detection accuracy(DA)of the proposed algorithm before considering the fuzzy logic system is equal to 95.27%;however,the fault DA is increased up to a minimum value of 98.8%after considering the fuzzy logic system.

关键词： system membership fault

Management in Sustainable Tourism Development of Serbian Spas

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Journal of Agricultural Science and Technology(A) 2012年第12期2卷 1356-1363页

作者： Biljana I1ic Dragica Stojanovic violeta Jovanovic Dragan Mihajlovic Department of Faculty of Management University of Megatrend Belgrade Zajecar 19000 Serbia

Since Serbia disposes with significant natural potentials, it could have been among the most attractive countries in Europe only if the historical circumstances had been different. Existing natural resources and possibilities for their improvement demand planned strategy to make them efficient. Tourism, as a significant instrument of development, can and should take an active part in the strategy of sustainable development. Special attention in the paper is paid to the development of Vrnjacka Banja Spa as it is one of the main tourist destinations in Serbia. The strengths, weaknesses, opportunities, and threats of a business venture （SWOT） analysis offers the basic elements for defining the strategic direction and program priorities, measures and targets for improving the overall development of spas in Serbia. To identify the SWOT factors, we used materials from a number of studies on Serbian tourism, surveys on tourists in Vrnjcka Banja Spa and analysis of the market and competition. The SWOT analysis proves that the priority in development of spas in Serbia is attractiveness of the destination which involves the spa-health tourism with great potential in complementary forms of tourism, such as sport-recreational, cultural, transit and hunting tourism. It means that the future strategy should be based on improving and involving modern spa products. It means improving and maximizing marketing so as to make the tourist destination attractive. It further implies maximum investment in modern tourist products.

关键词： Natural potentials spas in Serbian the SWOT analysis investment tourist product.

Modelling Dry Port Systems in the Framework of Inland Waterway Container Terminals

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Computer Modeling in Engineering & Sciences 2023年第10期137卷 1019-1046页

作者： Milovan Kovac Snezana Tadic Mladen Krstic violeta Roso Faculty of Transport and Traffic Engineering University of BelgradeBelgrade11000Serbia Department of Technology Management and Economics Chalmers University of TechnologyGothenburg41296Sweden

Overcoming the global sustainability challenges of logistics requires applying solutions that minimize the negative effects of logistics *** most efficient way of doing so is through intermodal transportation(IT).Current IT systems rely mostly on road,rail,and sea transport,not inland waterway *** dry port(DP)terminals has been proven as a sustainable means of promoting and utilizing IT in the hinterland of seaport container *** DP systems consolidate container flows from/to seaports and integrate road and rail transportation modes in the hinterland which improves the sustainability of the whole logistics *** this article,to extend literature on the sustainable development of different categories of IT terminals,especially DPs,and their varying roles,we examine the possibility of developing DP terminals within the framework of inland waterway container terminals(IWCTs).Establishing combined road–rail–inland waterway transport for observed container flows is expected to make the IT systems *** such,this article is the first to address the modelling of such DP *** mathematically formulating the problem of modelling DP systems,which entailed determining the number and location of DP terminals for IWCTs,their capacity,and their allocation of container flows,we solved the problem with a hybrid metaheuristic model based on the Bee Colony Optimisation(BCO)algorithmand themeasurement of alternatives and ranking according to compromise solution(i.e.,MARCOS)multi-criteria decision-making *** results from our case study of the Danube region suggest that planning and developingDP terminals in the framework of IWCTs can indeed be sustainable,as well as contribute to the development of logistics networks,the regionalisation of river ports,and the geographic expansion of their ***,the main contributions of this article are in proposing a novel DP concept variant,mathematically formulating

关键词： Dry port intermodal transport terminal sustainability Bee Colony Optimization MARCOS inland waterway transport

Preliminary assessment of the solar resource in the United Kingdom

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Clean Energy 2018年第2期2卷 112-125页

作者： Mahmoud Dhimish violeta Holmes Peter Mather Martin Sibley laboratory of Photovoltaics School of Computing and EngineeringUniversity of HuddersfieldUnited Kingdom

Solar radiation resources data are the foundation of knowledge for programs of large-scale deployment of solar energy *** article summarizes the analysis of a new weather stations network in the United *** analysis used three years(January 2015-December 2017)of data from 27 weather stations distributed across the *** data comprises global horizontal irradiance(GHI),diffuse horizontal irradiance,direct normal irradiance and the ambient *** design,implementation and data quality assurance are described to document the network extent and *** all observed datasets,we found that Plymouth(located in southwest England)has the dominant GHI and ambient temperature among all other 26 *** least GHI is observed for Aberdeen(located in northeast Scotland)estimated at 77.3 kWh/*** least average ambient temperature is equal to 9.1℃;the data were detected by the weather station located in the capital of Scotland(Edinburgh).Although continued measurements are needed to understand the interannual resource variability,the current study should have significant applications for preliminary technology selection,power plant modeling and resource forecasting.

关键词： solar resources GHI ambient temperature United Kingdom

A memristive map with coexisting chaos and hyperchaos

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Chinese Physics B 2021年第11期30卷 286-296页

作者： Sixiao Kong Chunbiao Li Shaobo He Serdar C¸ic¸ek Qiang lai Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CicAEET) Nanjing University of Information Science&TechnologyNanjing 210044China School of Artificial Intelligence Nanjing University of Information Science&TechnologyNanjing 210044China School of Physics and Electronics Central South UniversityChangsha 410083China Department of Electronic&Automation Vocational School of Hacıbektas¸Nevs¸ehir HacıBektas¸Veli UniversityHacıbektas¸50800Nevs¸ehirTurkey School of Electrical and Automation Engineering East China Jiaotong UniversityNanchang 330013China

By introducing a discrete memristor and periodic sinusoidal functions,a two-dimensional map with coexisting chaos and hyperchaos is *** coexisting chaotic and hyperchaotic attractors under different Lyapunov exponents are firstly found in this discrete map,along with which other regimes of coexistence such as coexisting chaos,quasiperiodic oscillation,and discrete periodic points are also *** hyperchaotic attractors can be flexibly controlled to be unipolar or bipolar by newly embedded constants meanwhile the amplitude can also be controlled in combination with those coexisting *** on the nonlinear auto-regressive model with exogenous inputs(NARX)for neural network,the dynamics of the memristive map is well predicted,which provides a potential passage in artificial intelligencebased applications.

关键词： memristor hyperchaos coexisting attractors amplitude control neural network

Adynamic and dynamic muscle transposition techniques for anal incontinence

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Gastroenterology Report 2014年第2期2卷 98-105页

作者： Goran Barišic Zoran Krivokapic Clinic for Digestive Surgery First Surgical ClinicBelgrade School of MedicineUniversity of BelgradeSerbia

Gracilis muscle transposition is well established in general surgery and has been the main muscle transposition technique for anal ***,through a schedule of continuous electrical stimulation,converts the fatigue-prone muscle fibres to a tonic fatigue-resistant morphology with acceptable results in those cases where there is limited sphincter muscle *** differences between gluteoplasty and graciloplasty,as well as the techniques and complications of both procedures,are outlined in this ***,these techniques are rarely carried out in specialized units with experience,as there is a high revision and explantation rate.

关键词： anal incontinence muscle transposition gluteoplasty graciloplasty dynamization