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Journal of Zoological Research 2019年第2期1卷 13-16页

作者： maryam taher Mohammad Saeed Heydarnejad Department of Animal Science Faculty of Basic ScienceShahrekord UniversityShahrekordIran

This research was aimed to study aquatic coleopteran faunas of Borujen and Lordegan(as two main towns of the Chaharmahal and Bakhtiari Province).Sampling was done at six stations between September 2017 to July *** aquatic Coleoptera were identified to the species level with the help of keys and related *** of samples was based on morphological characteristics such as taxonomic characters and external genitalia with appropriate entomological reference books and authors.A total of 12 species belonging to 11 genera and 4 families were *** greatest number of species identified were found in the family Dytiscidae Leach,1815 and the least number in the family Hydrophilidae Latreille,*** species of Agabus Leach,1817 namely,Agabus conspersus Marsham,1802 and Agabus bipustulatus Linnaeus,1767 were the most abundant insects.

关键词： Aquatic coleoptera Chaharmahal and bakhtiari Borujen and lordegan Dytiscidae Agabus

Application of honey-bee mating optimization on state estimation of a power distribution system including distributed generators

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第12期9卷 1753-1764页

作者： taher NIKNAM Electronic and Electrical Department Shiraz University of TechnologyShirazIran

We present a new approach based on honey-bee mating optimization to estimate the state variables in distribution networks including distributed generators. The proposed method considers practical models of electrical equipments such as static var compensators, voltage regulators, and under-load tap changer transformers, which have usually nonlinear and discrete characteristics. The feasibility of the proposed approach is demonstrated by comparison with the methods based on neural networks, ant colony optimization, and genetic algorithms for two test systems, a network with 34-bus radial test feeders and a realistic 80-bus 20 kV network.

关键词： Distributed generators (DGs) State estimation Honey-bee mating optimization (HBMO)

AN IMPRINTED POLYMER FOR REMOVAL OF Cd^(2+) FROM WATER SAMPLES:OPTIMIZATION OF ADSORPTION AND RECOVERY STEPS BY EXPERIMENTAL DESIGN

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Chinese Journal of Polymer Science 2011年第6期29卷 658-669页

作者： taher Alizadeh Department of Applied Chemistry Faculty of ScienceUniversity of Mohaghegh ArdabiliArdabilIran

A new ion-imprinted polymer （liP） was synthesized by copolymerization of 4-vinylpyridine （monomer）, ethyleneglycoldimethacrylate （cross-linker） and 2,2-azobis-isobutyronitrile （initiator） in the presence of Cd2＋ and quinaldic acid （complexing agent）. It was found that the adsorption capacity of IIP and blank polymer were 45.0 and 6.2 mg g-l, respectively. The relative selectivity coefficients of the imprinted polymer for different binary mixture were also calculated. Compared to non-imprinted polymer （NIP）, the IIP had higher selectivity for Cd（II）. The IIP was used as a sorbent for cadmium extraction from water samples by using a simple batch extraction procedure. The effect of different parameters on Cd2＋ extraction and its recovery from the IIP were evaluated and optimized by using experimental design methodology. The optimized adsorption/desorption procedure was applied for cadmium removal from the real water samples. The obtained recoveries proved that this IIP could be used for removal of trace cadmium ions from water samples.

关键词： Cd2+ removal Ion imprinted polymer Solid phase extraction Experimental design

Reaction parameters influence on the catalytic performance of copper-silica aerogel in the methanol steam reforming

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燃料化学学报 2016年第1期44卷 84-90页

作者： taher Yousefi Amiri Jafarsadegh Moghaddas Transport Phenomena Research Center Chemical Engineering FacultySahand University of Technology Department of Chemical Engineering Faculty of EngineeringUniversity of Zanjan

Steam reforming of methanol was carried out on the copper-silica aerogel *** effects of reaction temperature,feed rate,water to methanol molar ratio and carrier gas flowrate on the H_2 production rate and CO selectivity were investigated.M ethanol conversion was increased considerably in the range of about 240-300,after which it increased at a slightly lower *** used feed flowrate,steam to methanol molar ratio and carrier gas flowwere 1.2-9.0 m L/h,1.2-5.0 and 20-80 m L/min,*** the feed flowrate increased the H_2 production *** was found that an increase in the water to methanol ratio and decreasing the carrier gas flowrate slightly increases the H2production *** the water to methanol ratio causes the lowest temperature in which CO formation was observed to rise,so that for the ratio of 5.0 no CO formation was detected in temperatures lower than 375℃.In all conditions,by approaching the complete conversion,increasing the main product concentration,increasing the temperature and contact time,and decreasing the steam to methanol ratio,the CO selectivity was *** results suggested that CO was formed as a secondary product through reverse water-gas shift reaction and did not participate in the methanol steam reforming reaction mechanism.

关键词： copper-silica aerogel activity CO selectivity reaction parameters methanol steam reforming

Application of the Ion Pair of 2-(5-Bromo-2-pyridylazo)-5-diethylaminophenol and Ammonium Tetraphenylborate for Preconcentration of Trace Vanadium and Determination by Third Derivative Spectrophotometry

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Chinese Journal of Chemistry 2002年第12期20卷 1584-1590,1463页

作者： taher Mohammad Ali Department of Chemistry Shahid Bahonar University of Kerman Kerman IRAN

Vanadium is quantitatively retained on 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP)-ammonium tetraphenylborate with microcrystalline naphthalene or by a column method in the pH range of 2.1–4.5 from a large volume of aqueous solutions of various samples. After filtration, the solid mass consisting of the vanadium complex and naphthalene was dissolved with 5 mL of dimethylformamide and the metal was determined by the third derivative spectrophotometry. Vanadium complex can alternatively be quantitatively adsorbed on ammonium tetraphenylborate-naphthalene adsorbent packed in a column and determined similarly. About 0.05 μg of vanadium can be concentrated in a column from 250 mL of aqueous sample, where its concentration is as low as 0.2 ng/mL. The interference of a large number of anions and cations has been studied and the optimized conditions developed were utilized for the determination of trace amount of vanadium in various samples.

关键词： trace vanadium determination derivative spectrophotometry 5-Br-PADAP-TPB-naphthalene

Using statistical models and GIS to delimit the groundwater recharge potential areas and to estimate the infiltration rate: A case study of Nadhour-Sisseb-El Alem Basin, Tunisia

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Journal of Arid Land 2021年第11期13卷 1122-1141页

作者： Ali SOUEI taher ZOUAGHI Georesources Laboratory Water Researches and Technologies Center(WRTC)of Borj CedriaSoliman 8020Tunisia Department of Geology FSTUniversity of Tunis El ManarTunis C P 2092Tunisia Department of Geo-Exploration Techniques Faculty of Earth SciencesKing Abdulaziz UniversityJeddah 21589Saudi Arabia

The water resources of the Nadhour-Sisseb-El Alem Basin in Tunisia exhibit semi-arid and arid climatic *** induces an excessive pumping of groundwater,which creates drops in water level ranging about 1-2 m/***,these unfavorable conditions require interventions to rationalize integrated management in decision *** aim of this study is to determine a water recharge index(WRI),delineate the potential groundwater recharge area and estimate the potential groundwater recharge rate based on the integration of statistical models resulted from remote sensing imagery,GIS digital data(e.g.,lithology,soil,runoff),measured artificial recharge data,fuzzy set theory and multi-criteria decision making(MCDM)using the analytical hierarchy process(AHP).Eight factors affecting potential groundwater recharge were determined,namely lithology,soil,slope,topography,land cover/use,runoff,drainage and *** WRI is between 1.2 and 3.1,which is classified into five classes as poor,weak,moderate,good and very good sites of potential groundwater recharge *** very good and good classes occupied respectively 27%and 44%of the study *** potential groundwater recharge rate was 43%of total *** to the results of the study,river beds are favorable sites for groundwater recharge.

关键词： potential recharge remote sensing statistical models MCDM Nadhour-Sisseb-El Alem Basin

Thermal Conductivity of Low-Density Polyethylene Foams Part Ⅱ: Deep Investigation using Response Surface Methodology

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Journal of Thermal Science 2020年第1期29卷 159-168页

作者： HASANZADEH Rezgar AZDAST taher DONIAVI Ali Department of Mechanical Engineering Urmia University

Here,we conducted a deep study on the thermal insulation performance of polymeric foams using response surface methodology(RSM).Cell size,foam density,and cell wall thickness were considered as variable *** of variance(ANOVA)tool was utilized to recognize the effective parameters on the different mechanisms of heat *** models were presented to forecast the different mechanisms of heat transfer and their validities were checked using ANOVA tool as well as compared to the thermal conductivity *** plots were used to study the interaction effect of significant *** optimization procedure was performed using *** density and cell wall thickness are effective parameters on the solid thermal conductivity whereas cell size and foam density were significant parameters on the thermal *** decreasing foam density,gaseous thermal conductivity and thermal radiation were increased and solid thermal conductivity was *** regression model predicted the overall thermal conductivity with an average error smaller than 3%.The results illuminated that the overall thermal conductivity in the optimum conditions was as small as 29 mW/mK.

关键词： thermal insulation polymer foams response surface methodology

On Network Designs with Coding Error Detection and Correction Application

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Computers, Materials & Continua 2021年第6期67卷 3401-3418页

作者： Mahmoud Higazy taher A.Nofal Department of Mathematics and Statistics College of ScienceTaif UniversityTaif21944Saudi Arabia Department of Physics and Engineering Mathematics Faculty of Electronic EngineeringMenoufia UniversityMenouf32952Egypt

The detection of error and its correction is an important area of mathematics that is vastly constructed in all communication ***,combinatorial design theory has several applications like detecting or correcting errors in communication ***(graph)designs(GDs)are introduced as a generalization of the symmetric balanced incomplete block designs(BIBDs)that are utilized directly in the above mentioned *** networks(graphs)have been represented by vectors whose entries are the labels of the vertices related to the lengths of edges linked to ***,a general method is proposed and applied to construct new networks *** method of networks representation has simplified the method of constructing the network *** this paper,a novel representation of networks is introduced and used as a technique of constructing the group generated network designs of the complete bipartite networks and certain circulants.A technique of constructing the group generated network designs of the circulants is given with group generated graph designs(GDs)of certain *** addition,the GDs are transformed into an incidence matrices,the rows and the columns of these matrices can be both viewed as a binary nonlinear code.A novel coding error detection and correction application is proposed and examined.

关键词： Network decomposition network designs network edge covering circulant graphs

A hybrid evolutionary algorithm for distribution feeder reconfiguration

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Science China(Technological Sciences) 2010年第4期53卷 950-959页

作者： taher NIKNAM Ehsan AZAD FARSANI Electronic and Electrical Department Shiraz University of Technology

This paper presents a new method to reduce the distribution system loss by feeder *** new method combines self-adaptive particle swarm optimization(SAPSO) with shuffled frog-leaping algorithm(SFLA) in an attempt to find the global optimal solutions for the distribution feeder reconfiguration(DFR).In PSO algorithm,appropriate adjustment of the parameters is cumbersome and usually requires a lot of time and ***,a self-adaptive framework is proposed to improve the robustness of *** SAPSO the learning factors of PSO coevolve with the *** is combined with the SAPSO algorithm to improve its *** proposed algorithm is tested on two distribution test *** results of simulation show that the proposed algorithm is very powerful and guarantees to obtain the global optimization in minimum time.

关键词： self-adaptive particle swarm optimization(SAPSO) discrete particle swarm optimization(DPSO) binary particle swarm optimization(BPSO) shuffled frog-leaping algorithm(SFLA) evolutionary algorithms(EA) distribution feeder reconfiguration(DFR)

Low-temperature electrochemical synthesis and characterization of ultrafine Y(OH)_3 and Y_2O_3 nanoparticles

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Journal of Rare Earths 2012年第3期30卷 236-240页

作者： Mustafa AGHAZADEH taher YOUSEFI Mehdi GHAEMI Laser and Optic Research School NSTRI P.O. Box 11365-8486 Tehran Iran Material Research School NSTRI P.O. Box 14395-836 Tehran Iran Department of Chemistry Science Faculty Golestan University P.O. Box 49138-15739 Gorgan Iran

Ultrafine Y（OH）3 nanoparticles were successfully deposited from an additive-free 0.005 mol/L YCl3 low-temperature bath on the steel cathode at the current density of 0.5 mA/cm2 and bath temperature of 10 oC. Heat treatment of the prepared Y（OH）3 nanoparticles at 600 oC in air led to the formation of Y2O3 nanoparticles. Thermal behavior and phase transformation during the heat treatment of Y（OH）3 were investigated by differential scanning calorimetry （DSC） and thermogramimetric analysis （TGA）. The morphologies, crystal structures and compositions of the prepared materials were examined by means of scanning and transmission electron microscopy （SEM and TEM） as well as X-ray diffraction （XRD） and FT-IR spectroscopy. The results showed that the prepared Y（OH）3 nanoparticles was essentially amorphous and composed of well dispersed ultrafine particles with size of 4 nm. After heat treatment, the obtained oxide product was well crystallized cubic phase of Y2O3 nanoparticles with the grain size of around 5 nm. It was concluded that low-temperature cathodic electrodeposition offered a facile and feasible way for preparation of ultrafine Y（OH）3 and Y2O3 nanoparticles.

关键词： Y(OH)3 Y2O3 cathodic electrodeposition heat treatment nanoparticles rare earths