检索结果-南通市图书馆

Techno-economic-environmental comparison of floating photovoltaic plant with conventional solar photovoltaic plant in northern Iran

在线全文

学校读者我要写书评

暂无评论

Clean Energy 2022年第2期6卷 353-361页

作者： Sina Semeskandeh Mehrdad Hojjat Mohamad hosseini Abardeh Department of Electrical and Computer Engineering Shahrood BranchIslamic Azad UniversityShahroodIran

Photovoltaic(PV)systems can be used to generate electricity due to the potential for solar energy in *** floating photovol-taic(FPV)systems is a new approach to utilizing PV systems in *** of Iran’s energy consumption is supplied from fossil fuels,especially oil and *** recent years,Iran has faced environmental problems and air *** generation using fossil fuels has led to increased environmental ***,PV systems can be used to generate electricity due to the potential for solar energy in *** interest in predicting the energy production of PV power plants has increased in recent *** this regard,the techno-economic-environmental study of constructing PV power plants is a basic process to encourage people to use solar energy.A techno-economic-environmental feasibility study has been performed to construct a 5-kW FPV and ground PV(GPV)power plant in a northern city of ***,the FPV system is compared with the ground PV system using MATLAB^(■)Simulink and RETScreen^(■)*** this study,the effects of wind and water temperature have been ***,a sensitivity analysis was performed due to the uncertainty in climatic conditions and the amount of PV energy *** simulation results show that due to the cooling effect for panels in the FPV system,the production capacity and panels’efficiency are respectively 19.47%and 27.98%higher than the those of the GPV *** addition,the FPV system was found to have a 16.96%increase in the annual performance ***,using the FPV system reduces the equity payback to 6.3 years(a 22.2%reduction compared to the GPV power plant).

关键词： photovoltaic solar energy floating feasibility environmental

The Fabrication of Water-Soluble Chitosan Capsule Shell Modified by Alginate and Gembili Starch(Dioscorea esculenta L)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Renewable Materials 2022年第9期10卷 2365-2376页

作者： Yatim Lailun Ni’mah Suprapto Suprapto Harmami Ita Ulfin Puput Asmaul Fauziyah Chemistry Department Faculty of Science and Analytical DataInstitut Teknologi Sepuluh NopemberSurabayaIndonesia

Capsule shells have been successfully fabricated from water-soluble chitosan(WSC)with the addition of alginate and Gembili *** was synthesized from crab shell chitosan by depolymerization *** capsule shells were made with the composition of WSC:Alginate,2:1,3:1 and 4:1(w/w)with and without the addition of Gembili *** starch was added with a ratio of Alginate:Starch,1:1(w/w).The capsule shell properties were evaluated according to Indonesian Pharmacopoeia *** solubility test showed that the capsule shells were comply with the *** highest degrees of swelling in water and HCl 0.1 N solution were 491.93%and 410.51%,*** highest degradation percentages in water and HCl 0.1 N solution were 57.80%and 21.44%,*** observation of physical appearance indicated that the capsule shell with WSC:Alginate:Starch in ratio of 3:1:1 has appearance close to commercial capsule shell.

关键词： Capsule shell water soluble chitosan capsule shell degradation capsule shell solubility

Kernel Search-Framework for Dynamic Controller Placement in Software-Defined Network

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2021年第9期68卷 3391-3410页

作者： Ali Abdi Seyedkolaei Seyed Amin hosseini Seno Rahmat Budiarto Faculty of Engineering Ferdowsi University of MashhadMashhadIran Department of Informatics Faculty of Science and TechnologyUniversitas Alazhar IndonesiaJakartaIndonesia

In software-defined networking(SDN)networks,unlike traditional networks,the control plane is located separately in a device or *** of the most critical problems in these networks is a controller placement problem,which has a significant impact on the network’s overall *** paper attempts to provide a solution to this problem aiming to reduce the operational cost of the network and improve their survivability and load *** researchers have proposed a suitable framework called kernel search introducing integer programming formulations to address the controller placement *** demonstrates through careful computational studies that the formulations can design networks with much less installation cost while accepting a general connected topology among controllers and user-defined survivability *** researchers used the proposed framework on six different topologies then analyzed and compared with Iterated Local Search(ILS)and Expansion model for the controller placement problem(EMCPP)along with considering several evaluation *** results show that the proposed framework outperforms the ILS and ***,the proposed framework has a 38.53%and 38.02%improvement in reducing network implementation costs than EMCPP and ILS,respectively.

关键词： Software-defined network controller placement kernel search integer programming survivability cost

Techno-economic-environmental feasibility study of a photovoltaic system in northern part of Iran including a two-stage multi-string inverter with DC-DC ZETA converter and a modified P&O algorithm

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Clean Energy 2022年第1期6卷 127-140页

作者： Sina Semeskandeh Mehrdad Hojjat Mohamad hosseini Abardeh Department of Electrical and Computer Engineering Shahrood BranchIslamic Azad UniversityShahroodIran

Inverters play a significant role in the configuration of grid-connected photovoltaic(PV)*** perturb-and-observe(P&O)algorithm is a common method to derive the maximum power from grid-connected inverters;however,the possibility of losing maximum power due to sudden changes in radiation is a significant drawback of this control *** overcome this barrier,the two-stage multi-string inverter using the ZETA DC-DC converter and a novel P&O algorithm has been proposed to increase the efficiency of these *** proposed inverter has been simulated in MATLAB/SIMULINK *** investigate the performance of the proposed inverter,technical,environmental and economic feasibility studies have been performed for the construction of a 5-kW PV power plant in a northern city of Iran(Sari)using the RETScreen software developed by Natural Resources *** the other hand,most feasibility studies for power-plant construction are based on the concept of inverter peak efficiency,which leads to non-optimal system design due to the short operation duration of the inverter at this ***,the weighted European efficiency has been used in the feasibility study for more accurate ***,the performance of the proposed inverter is compared to that of a two-stage multi-string inverter using a conventional P&O algorithm and the single-stage(central)*** simulation results indicated that the proposed inverter injects 7.6 MW of power into the grid per ***,it prevents the emission of 88 tons of CO_(2)(over 20 years),which is equivalent to saving 1883.5 litres of gasoline per year.

关键词： photovoltaic environmental inverter grid-connected feasibility P&O algorithm

EIS Study on Pitting Corrosion of AA5083-H321 Aluminum-Magnesium Alloy in Stagnant 3.5% NaCl Solution

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2008年第2期24卷 215-219页

作者： K.Jafarzadeh T.Shahrabi M.G.hosseini Corrosion Lab. Materials Eng.Dept.Tarbiat Modares Univ.TehranIran Dept.of Physical Chemistry Facul-ty of ChemistryTabriz Univ.TabrizIran

In this research, EIS （electrochemical impedance spectroscopy） technique was utilized to study the pitting corrosion behaviour of AA5083-H321 aluminum-magnesium alloy in 3.5% NaCl solution. Impedance spectra were obtained during 240 h of exposure of the sample to the test solution. The surface and cross-section of the samples were studied by scanning electron microscopy （SEM） and EDAX （energy dispersive analysis of X-ray） analysis. The results indicated that as the resistance of the passive layer on intermetallic particles is very small, this parameter on the sample surface layers is controlled by that of pure passive layer. However, the capacitors in the proposed equivalent circuit are replaced with the constant phase elements （CPE）, due to non-uniformity and occurrence of pitting corrosion on the surface. The outward diffusion of Al^＋3 ions through the passive layer and the thickening of this layer cause the impedance decrease in the first 24 h and increase afterwards. The detachment of intermetallic particles from some of pits and the accumulation of the corrosion products inside some others are factors that prevents the continuation of cathodic reactions on the top of the intermetallic particles.

关键词： Corrosion AA5083-H321 aluminum-magnesium alloy Impedance Pitting Intermetallic particle Passive layer

Investigation of solar-induced photoelectrochemical water splitting and photocatalytic dye removal activities of camphor sulfonic acid doped polyaniline-WO3-MWCNT ternary nanocomposite

在线全文

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2020年第3期38卷 7-18页

作者： Mir Ghasem hosseini Pariya Yardani Sefidi Ahmet Musap Mert Solen Kinayyigit Department of Physical Chemistry Electrochemistry Research LaboratoryUniversity of TabrizTabrizIran Engineering Faculty Department of Materials Science and NanotechnologyNear East University99138NicosiaNorth CyprusMersin 10Turkey Laboratory of Nanocatalysis and Clean Energy Technologies Institute of NanotechnologyGebze Technical University41400KocaeliTurkey

The camphor sulfonic acid doped polyaniline-WO3-multiwall carbon nanotube(CSA PANI-WO3-CNT)ternary nanocomposite was synthesized during in-situ oxidative polymerization and characterized by Fourier transform infrared(FTIR)spectroscopy,Raman spectroscopy,X-ray diffraction(XRD),Field emission scanning electron microscopy(FESEM),X-ray photoelectron spectroscopy(XPS),Transmission electron microscopy(TEM),and Energy-dispersive X-ray spectroscopy(EDS).The application of CSA PANIWO3-CNT ternary nanocomposite was investigated as the photocatalyst in the degradation of methylene blue dye(MB)and as the noble metal-free photoanode in photoelectrochemical water splitting under solar light *** degradation percentage of MB dye after 60 min illumination by CSA PANI-WO3-CNT ternary nanocomposite reached 91.40%which was higher than that of pure WO3(43.45%),pure CSA PANI(48.4%)and CSA PANI-WO3 binary nanocomposite(85.15%).The photocurrent density of indium tin oxide(ITO)/CSA PANI-WO3-CNT photoanode obtained 0.81 m A/cm2 at 1.23 V *** hydrogen electrode under illumination which was 1.27,2.13,and 4.26 times higher than that of the ITO/CSA PANI-WO3(0.64 m A/cm2),ITO/pure CSA PANI(0.38 m A/cm2),and ITO/pure WO3(0.19 m A/cm2).Also,the applied bias photon-to-current efficiency(ABPE)of ITO/CSA PANI-WO3-CNT was obtained 0.11%which showed two-fold,four-fold,and five-fold enhancements compared to the ITO/CSA PANI-WO3,ITO/CSA PANI,and ITO/WO3,*** electrochemical impedance spectroscopy,as well as the Mott-Schottky results,confirmed the better photoelectrocatalytic activity of ITO/CSA PANI-WO3-CNT in comparison with ITO/WO3,ITO/CSA PANI,and ITO/CSA *** observed improvement in the photocatalytic and photoelectrocatalytic performances of WO3 in the presence of CSA PANI is due to the formation of type-II heterojunction between WO3 and CSA PANI which allows the separation of charge carriers easier and *** the other hand,MWCNT addition to the CSA PANI-

关键词： Camphor sulfonic acid Polyaniline WO3 Photocatalyst Water splitting

Application of fuzzy logic for determining of coal mine mechanization

在线全文

学校读者我要写书评

暂无评论

Journal of Coal Science & Engineering(China) 2012年第3期18卷 225-231页

作者： hosseini S AA ATAEI M hosseini S M AKHYANI M Department of mining Shahrood BranchIslamic Azad UniversityShahroodIran Faculty of Mining Petroleum and GeophysicsShahrood University of TechnologyShahroodIran

The fundamental task of mining engineers is to produce more coal at a given level of labour input and material costs, for optimum quality and maximum efficiency. To achieve these goals, it is necessary to automate and mechanize mining operations. Mechanization is an objective that can result in significant cost reduction and higher levels of profitability for underground mines. To analyze the potential of mechanization, some important factors such as seam inclination and thickness, geological disturbances, seam floor conditions and roof conditions should be considered. In this study we have used fuzzy logic, membership functions and created fuzzy rule-based methods and considered the ultimate objective： mechanization of mining. As a case study, the mechanization of the Tazare coal seams in Shahroud area of Iran was investigated. The results show a low potential for mechanization in most of the Tazare coal seams.

关键词： fuzzy logic mechanization coal seams productivity fuzzytech software

Prediction of the soil erosion in a forest and sediment yield from road network through GIS and SEDMODL

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Sediment Research 2014年第1期29卷 118-125页

作者： Aidin PARSAKHOO Majid LOTFALIAN Ataollah KAVIAN Seyed Ataollah hosseini Department of Forestry Gorgan Agricultural Sciences and Natural Resources University Department of Watershed Management Sari Agricultural Sciences and Natural Resources University Department Forestry Sari Agricultural Sciences and Natural Resources University University of Tehran

This study was conducted to classify water erosion risk for a deciduous forest and to predict the amount of sediment yield from forest road *** in combination with AHP was used for determining the soil erosion risk degrees of ***,sediment yield from forest roads with gravel and asphalted surfacing was estimated using *** simulator was used in calibration and validation process of *** showed that47.9%of forest soil is classified from moderate to very high vulnerability.32.3%of roads were located in soil erosion risk class of very *** class is generally found in the eastern region of forest,while areas with very low risk are found in the south western part.14.6%of the forest roads were ranked as having very low sediment *** 61 segments out of 339 segments of forest road network delivered sediment to the ravine *** estimated annual sediment yield for all of road sections by SEDMODL and rainfall simulator were 10,935.45 and10,509.29 g m,*** of the calibration and validation process showed that the variation accounted for in the predicted values by SEDMODL with the observed values under rainfall simulation was 3.90%.Best management practices(BMP) must be considered for the areas with high degrees of erosion risk.

关键词： Soil erosion Forest road GIS SEDMODL

Density-Dependent Conformable Space-time Fractional Diffusion-Reaction Equation and Its Exact Solutions

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2018年第1期69卷 1-4页

作者： Kamyar hosseini Peyman Mayeli Ahmet Bekir Ozkan Guner Department of Mathematics Rasht Branch Islamic Azad University Young Researchers and Elite Club Lahijan Branch Islamic Azad University Department of Mathematics and Computer Art-Science Faculty Eskisehir Osmangazi University Department of International Trade Faculty of Economics and Administrative Sciences Cankiri Karatekin University

In this article, a special type of fractional differential equations(FDEs) named the density-dependent conformable fractional diffusion-reaction(DDCFDR) equation is studied. Aforementioned equation has a significant role in the modelling of some phenomena arising in the applied science. The well-organized methods, including the exp(-φ(ε))-expansion and modified Kudryashov methods are exerted to generate the exact solutions of this equation such that some of the solutions are new and have been reported for the first time. Results illustrate that both methods have a great performance in handling the DDCFDR equation.

关键词： density-dependent conformable fractional diffusion-reaction equation exp(-Ф(ε) )-expansion method modified Kudryashov method exact solutions