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Cadmium sorption by sodium and thiourea-modified zeolite-rich tuffs

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Journal of Environmental Sciences 2017年第2期29卷 39-48页

作者： Perfecto Barragán P m.Guadalupe macedo m maria T.Olguín Instituto Tecnologico de Toluca Laboratorio de Investigacion en Ingenieria Ambiental.Av.Tecnologico S/NColonia Ex-Rancho La VirgenMetepecEstado de Meico CP.52140Mexico Instituto national de Investigaciones nucleares Departamento de QuimicaA.P.18-1027Col.EseandonDelegacion Miguel Hidalgo C.P.11801Mexico

In the present investigation, two zeolite-rich tuffs from Guaymas and El Cajon（State of Sonora）, which were conditioned with a sodium chloride solution and subsequently modified with a thiourea solution, were chosen to evaluate the removal of Cd from aqueous systems. The zeolitic materials were characterized by scanning electron microscopy and X-ray diffraction. The surface area was also determined. The experiments were performed in a batch system, and the influences of p H, contact time between phases, and the concentration of Cd in the solution on the adsorption by sodium or thiourea-modified zeolite-rich tuff were investigated. It was found that the efficiency of Cd ion removal from aqueous solutions is influenced by the p H of the aqueous systems. The Cd adsorption kinetic data were well fitted to a pseudo-second-order model in all cases. The Langmuir and Langmuir–Freundlich isotherms adequately described the Cd sorption behavior by the zeolite from El Cajon pretreated with na Cl and the zeolite from Guaymas modified with thiourea, respectively.

关键词： Cadmium Zeolite-rich-tuff Sorption Kinetics Isotherms

An Efficient Deep Learning-based Content-based Image Retrieval Framework

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Computer Systems Science & Engineering 2022年第11期43卷 683-700页

作者： m.Sivakumar n.m.Saravana Kumar n.Karthikeyan Department of CSE Sri Krishna College of Engineering and TechnologyAnna UniversityCoimbatoreTamil Nadu641008India Department of CSE M.Kumarasamy College of EngineeringAnna UniversityKarurTamil Nadu639113India

The use of massive image databases has increased drastically over the few years due to evolution of multimedia *** retrieval has become one of the vital tools in image processing ***-Based Image Retrieval(CBIR)has been widely used in varied ***,the results produced by the usage of a single image feature are not ***,multiple image features are used very often for attaining better ***,fast and effective searching for relevant images from a database becomes a challenging *** the previous existing system,the CBIR has used the combined feature extraction technique using color auto-correlogram,Rotation-Invariant Uniform Local Binary Patterns(RULBP)and local ***,the existing system does not provide significant results in terms of recall and ***,the computational complexity is higher for the existing CBIR *** order to handle the above mentioned issues,the Gray Level Co-occurrence matrix(GLCm)with Deep Learning based Enhanced Convolution neural network(DLECnn)is proposed in this *** proposed system framework includes noise reduction using histogram equalization,feature extraction using GLCm,similarity matching computation using Hierarchal and Fuzzy c-means(HFCm)algorithm and the image retrieval using DLECnn *** histogram equalization has been used for computing the image *** enhanced image has a uniform ***,the GLCm method has been used to extract the features such as shape,texture,colour,annotations and *** HFCm similarity measure is used for computing the query image vector's similarity index with every database *** enhancing the performance of this image retrieval approach,the DLECnn algorithm is proposed to retrieve more accurate features of the *** proposed GLCm+DLECnn algorithm provides better results associated with high accuracy,precision,recall,f-measure and lesser *** the experimental results,it is

关键词： Content based image retrieval(CBIR) improved gray level cooccurrence matrix(GLCm) hierarchal and fuzzy C-means(HFCm)algorithm deep learning based enhanced convolution neural network(DLECnn)

Analytical approach to dynamics of transformed rotating-wave approximation with dephasing

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Chinese Physics B 2013年第9期22卷 413-418页

作者： m.mirzaee n.Kamani Department of Physics Faculty of scienceArak University

We study the dynamics of the Jaynes-Cummings model within transformed rotating-wave approximation (TRWA). We analyze this model coupled to a dephasing reservoir, through the Lindblad formalism in the master equation. Then, we examine the expectation value of the number operator. Finally, we investigate the validity of this model under dephasing using the mandel parameter and the total number of quanta.

关键词： atom-photon interaction Jaynes-Cummings model mandel parameter

Undrained monotonic and cyclic behavior of sand-ground rubber mixtures

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Earthquake Engineering and Engineering Vibration 2018年第3期17卷 541-553页

作者： Shariatmadari n Karimpour-Fard m Shargh A Department of Civil Engineering Iran University of Science and Technology Geotechnical Engineering Department of Civil EngineeringIran University of Science and Technology

In this study the stress–strain characteristics of sand-ground rubber mixtures are investigated in the sandlike zone,at different confining pressures,using hollow cylinder specimens subjected to torsional monotonic and cyclic *** monotonic loading a mixture of sand-ground rubber with 10% and 25% rubber content show more contraction behaviour than that observed in a pure sand *** transformation point in these mixtures are located on a larger shear *** expected,the shear strength of specimens decreases with increase of ground rubber ***,with increasing of effective confining pressure,the loss in shear strength of the mixture is *** addition,a mixture with 25% ground rubber shows a smaller loss in shear strength compared to a mixture with 10% ground rubber *** cyclic loading mixtures with 10% and 25% ground rubber have similar liquefaction resistance,especially at confining pressures of 110 k Pa and 260 k ***,by using of the mixture with 25% ground rubber,a larger volume of scrap tires could be *** addition of ground rubber to sand would affect the shear strain variation and excess pore water pressure trends,and this effect was further intensified with increasing ground rubber percentage.

关键词： Ground rubber tire crumbs liquefaction resistance hollow cylinder torsional apparatus monotonic and cyclic behaviour

EDSUCh:A robust ensemble data summarization method for effective medical diagnosis

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Digital Communications and networks 2024年第1期10卷 182-189页

作者： mohiuddin Ahmed A.n.m.Bazlur Rashid School of Science Edith Cowan UniversityPerthAustralia

Identifying rare patterns for medical diagnosis is a challenging task due to heterogeneity and the volume of *** summarization can create a concise version of the original data that can be used for effective *** this paper,we propose an ensemble summarization method that combines clustering and sampling to create a summary of the original data to ensure the inclusion of rare *** the best of our knowledge,there has been no such technique available to augment the performance of anomaly detection techniques and simultaneously increase the efficiency of medical *** performance of popular anomaly detection algorithms increases significantly in terms of accuracy and computational complexity when the summaries are ***,the medical diagnosis becomes more effective,and our experimental results reflect that the combination of the proposed summarization scheme and all underlying algorithms used in this paper outperforms the most popular anomaly detection techniques.

关键词： Data summarization Ensemble medical diagnosis Sampling

Effects of Contents of multiwall Carbon nanotubes in Polyaniline Films on Optical and Electrical Properties of Polyaniline

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Chinese Physics Letters 2016年第11期33卷 116-119页

作者： n.Bafandeh m.m.Larijani A.Shafiekhani m.R.Hantehzadeh n.Sheikh Department of Physics Science and Research BranchIslamic Azad University nuclear Radiation Applications Research School Nuclear Science and Technology Research Institute Physics Department Alzahra University School of Physics Institute for Research in Fundamental Sciences

We investigate the effects of different contents of multiwall carbon nanotubes （mWCnTs） on optical and electrical properties of polyaniline （PAnI）. The mWCnTs/PAnI composites are deposited on glass substrates coated with indium tin oxide （ITO） by the spin-coating technique. The scanning electron microscopy shows that nanotubes are coated with the PAnI layer and x-ray diffraction patterns show that all deposited composite films have an amorphous character. The analysis of a UV-vis spectrophotometer indicates the blue shift of the absorbance peak and a decrease in optical band gap value by the enhancement of the CnT content in the PAnI matrix while the Urbach energy increases. The Raman spectrum shows the blue shift 1404→1417cm^-1 and photoluminescence spectra show an increase in the intensity of characteristic PAnI peak at 436 nm with the increasing CnT content.

关键词： PAnI of CnT in CnTs on

Effect of Hydrostatic Pressure on Optical Properties of TlBr and TlCl

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计算物理 2013年第2期30卷 265-270页

作者： Amrane n Benkraouda m Department of Physics United Arab Emirates UniversityAl-AinP.O.Box 17551United Arab Emirates

We present first principles calculations of optical properties of binary semiconductor compounds TlBr and *** of dielectric function,reflectivity and refractive index on hydrostatic pressure are calculated using self-consistent scalar relativistic full potential linear augmented plane wave method(FP-LAPW) within a generalized gradient approximation(GGA).They are compared with previous calculations and experimental *** agreements are found.

关键词： optical properties dielectric function refractive index radiation detectors

Algebraic and group treatments to nonlinear displaced number states and their nonclassicality features:A new approach

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Chinese Physics B 2015年第6期24卷 334-340页

作者： n Asili Firouzabadi m K Tavassoly m J Faghihi Atomic and molecular Group Faculty of PhysicsYazd University The Laboratory of Quantum Information Processing Yazd University Physics and Photonics Department Graduate University of Advanced Technology

Recently, nonlinear displaced number states （nDnSs） have been manually introduced, in which the deformation function f（n） has been artificially added to the previously well-known displaced number states （DnSs）. Indeed, just a simple comparison has been performed between the standard coherent state and nonlinear coherent state for the formation of nDnSs. In the present paper, after expressing enough physical motivation of our procedure, four distinct classes of nDnSs are presented by applying algebraic and group treatments. To achieve this purpose, by considering the DnSs and recalling the nonlinear coherent states formalism, the nDnSs are logically defined through an algebraic consideration. In addition, by using a particular class of Gilmore-Perelomov-type of SU（1,1） and a class of SU（2） coherent states, the nDnSs are introduced via group-theoretical approach. Then, in order to examine the nonclassical behavior of these states, sub-Poissonian statistics by evaluating mandel parameter and Wigner quasi-probability distribution function associated with the obtained nDnSs are discussed, in detail.

关键词： displaced number state nonlinear coherent state Wigner function nonclassical state

nuclear Level Density and Thermodynamic Functions for nuclei with Static Deformation

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Communications in Theoretical Physics 2002年第4期37卷 457-460页

作者： A.n.Behkami m.n.nasrabadi PhysicsDepartment ShirazUniversityShiraz71454Iran

The level densities of even-odd and even-even isotopes 161,162Dy,166 Er and 171,172yb were calculated using microscopic theory of interacting fermions and compared with *** is found that the data can be well reproduced with level density formalism for nuclei with static *** nuclear temperature as well as the entropy of nuclear system as a function of excitation energy has been extracted from the BCS *** is shown that the entropy exhibits an S-formed shape as a function of excitation *** is interpreted as a phase *** of treating the even-odd and even-even nuclear systems has been presented and discussed.

关键词：核物理原子核能级密度热力学函数