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Semicomplete Finite p-Groups of Class 2

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Algebra Colloquium 2016年第4期23卷 651-656页

作者： m. shabani Attar Department of mathematics Payame Noor University P.O. Box 19395-4697 Tehran Iran

Let G be a group and G＇ be its commutator subgroup. An automorphism α of a group G is called an IA-automorphism if x^-1α（x） ∈G＇ for each x∈G. The set of all IA-automorphisms of G is denoted by IA（G）. A group G is called semicomplete if and only if IA（G） = Inn（G）, where Inn（G） is the inner automorphism group of G. In this paper we completely characterize semicomplete finite p-groups of class 2; we also classify all semicomplete finite p-groups of order p^n （n≤5）, where p is an odd prime. This completes our work in 2011.

关键词： semicomplete groups IA-automorphisms finite p-groups

Investigation on leaching of malachite by citric acid

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International Journal of minerals,metallurgy and materials 2012年第9期19卷 782-786页

作者： m.A. shabani m. Irannajad A.R. Azadmehr Department of mining & metallurgical Engineering Amirkabir University of Technology P.O. Box 15875-4413 Tehran *** Iran

Leaching of an oxidized copper ore containing malachite, as a new approach, was investigated by an organic reagent, citric acid. Sulfuric acid is the most common reagent in the leaching of oxide copper ores, but it has several side effects such as severe adverse impact on the environment. In this investigation, the effects of particle size, acid concentration, leaching time, solid/liquid ratio, temperature, and stirring speed were optimized. According to the experimental results, malachite leaching by citric acid was technically feasible. Optimum leaching conditions were found as follows： the range of particle size, 105-150 μm; acid concentration, 0.2 m; leaching time, 30 min; solid/liquid ratio, 1：20 g/mL; temperature, 40℃; and stirring speed, 200 r/min. Under the optimum conditions, 91.61% of copper was extracted.

关键词： malachite copper ore treatment leaching organic acids citric acid

Effect of Ablation Casting on microstructure and Casting Properties of A356 Aluminium Casting Alloy

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Acta metallurgica Sinica(English Letters) 2013年第1期26卷 85-91页

作者： V. Bohlooli m. shabani mahalli S. m. A. Boutorabi Casting Research Center School of Metallurgy and Materials Engineering Iran University of Science and Technology (IUST) Center of Excellence for High Strength Alloys Technology (CEHSAT) School of Metallurgy and Materials Engineering Iran University of Science and Technology (IUST)

Recently the Ablation Casting Technology was invented as a new casting process to improve foundry products quality. In this study, the effects of processing variables on the porosity content, rnicrostructure and feedability of A356 casting alloy were investigated. Secondary dendrite arm spacing （SDAS） and eutectic silicon mor-phologies were studied to evaluate the influence of Ablation Casting on the rnicrostructure. Casting density was measured in order to identify porosity content and feedability of ablated and non-ablated specimens. In addition, solidification behavior of the samples was investigated by using thermal analysis technique. The cooling curves and the first derivative curves were plotted and compared with each other. Results showed the ablation process could increase solidification rate significantly. In addition, the microstructural evidences revealed that Ablation Casting process results in more fine and homogeneous structure compared to the non-ablated casting. The feedability improved, SDAS reduced to 35% and porosity content decreased to 3.84 vol.% by implementing this process. It concluded the Ablation Casting is an effective process to gain higher quality in aluminum foundry.

关键词： Ablation Casting A356 aluminium alloy microstructure Porosity Cooling curve

Numerical and experimental investigations of weld pool geometry in GTA welding of pure aluminum

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Journal of Central South University 2014年第1期21卷 20-26页

作者： A.H.Faraji A.Bahmani m.Goodarzi S.H.Seyedein m.O.shabani Young Researchers Club Varamin-Pishva BranchIslamic Azad University materilal Science and Engineering Department Sharif University of Technology Department of metallurgy and materials Engineering Iran University of Science and Technology materials and Energy Research Center (mERC)

A 2-D numerical model was developed to predict the shape of weld pool in stationary GTA welding of commercial pure aluminium, without considering fluid flow in the weld pool. A Gaussian current density and heat input distribution on the surface of the workpiece were considered. The parameters of Gaussian distribution were modified by comparing calculated results with experimental ones. It was found that these distribution parameters are fimctions of applied current and arc length. Effects of arc length, applied current and welding time on the geometry of the weld pool were investigated. To check the validity of the model, a series of experiments were also conducted. In general, the agreement between calculated overall shape of the weld pool and the experimental one was acceptable, especially in low applied currents. Therefore, it can be concluded that in pure aluminium, the heat conduction is dominant mechanism of heat transfer in the weld pool.

关键词： numerical model GTA welding pure aluminium weld pool

REE Tetrad Effects in Rare-metal Granites

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Chinese Journal Of Geochemistry 1993年第3期12卷 206-219页

作者：赵振华 AKImASA mASUDA m.B.shabani nstitute of Geochemistry(Guangzhou Branch) Academia SinicaGuangzhou510640 The present address:Department of Chemistry The University of Electro-communicationsTokyoJapan Chemistry Department Faculty of SciencesTokyo UniversityJapan

Described in this paper are the characteristics of tetrad effects of REE in rare-metal *** on the analytical data and experimental geochemical data available,it is pointed out that the tetrad effects of REE in the granites are produced in the metal-fluid *** fractional crystallization of granitic melt(containing REE accessary minerals)and its interaction with volatile-rich(F,Cl)fluid are the major factors leading to the tetrad effects of *** this,this paper presents a composite genetic model for high-degree fractional crystallization-volatile-rich fluid metasomatism of rare-metal *** the model,quantitative calculations have been ***,it is pointed out that the tetrad effects of REE can be used as an important indicator to distinguish mineralized granites from barren ones.

关键词：花岗岩稀土元素氟氯成因

Application of a characterized difference-frequency laser source to carbon monoxide trace detection

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Chinese Physics B 2012年第6期21卷 257-263页

作者： Alireza Khorsandi Zahra shabani monireh Ranjbar S. Ali Hoseinzadeh Salati Department of Physics University of Isfahan81746-73441 IsfahanIran

A tunable continuous wave（cw） mid-infrared（mIR） laser based on difference-frequency generation（DFG） in a 1.5-cm long AgGaS2 nonlinear crystal for trace gas detection is *** visible and near-infrared diode lasers were used as pump and signal *** mIR-DFG laser was tunable in a wavelength range of 4.75 μm-4.88 μ*** phase-matching（Pm） condition was non-critically achieved by adjusting the temperature of the crystal for fixed pairs of input pump and signal *** required Pm temperatures of the generated mIR-DFG wavelengths have been calculated by using three sets of recent Sellmeier equations and the temperature-dispersion equations of AgGaS2 given by Willer U,et al.（Willer U,Blanke T and Schade W 2001 ***.40 5439）.Then the calculated Pm temperatures are compared with the experimental *** performance of the mIR-DFG laser is shown by the trace detection of the P（16） carbon monoxide（12C16O） absorption line in a laboratory-fabricated absorption *** enhanced sensitivity of about 0.6×10 4 was obtained through the long path absorption provided by consecutive reflections between coated cylindrical mirrors of a constructed cell.

关键词： difference-frequency generation AgGaS2 crystal multi-pass cell

Interevent times estimation of major and continuous earthquakes in Hormozgan region based on radial basis function neural network

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Geodesy and Geodynamics 2016年第1期7卷 64-75页

作者： m.R.mosavi m.Kavei m.shabani Y.Hatem Khani Department of Electrical Engineering Iran University of Science and Technology Department of Physics University of Hormozgan Department of Electrical Engineering University of Imam Khomeini Marine Sciences

This paper presents a new method to estimate the time of important earthquakes in Hormozgan region with magnitude greater than 5.5 based on the Radial Basis Function （RBF） Neural Network （NN） models. Input vector to the network is composed of different seisrnicity rates between main events that are calculated in convenient and reliable way to create optimized training methods. It helps network with a limited number of training data to estimation. It is common for earthquakes modeling by data-driven methods in this case. In addition, the proposed method is combined with Rosenberg cluster method to remove aftershocks events from the history of catalog for NN to better process the data. The results show that created RBF model successfully estimates the interevent times between large and sequence earthquakes that can be used as a tool to predict earthquake, so that comparison with other NN structure, for example multi- Layer Perceptron （mLP） NN, reveals the superiority of the proposed method. Because of superiority proposed method has higher accuracy, lower costs and simpler network structure.

关键词： Interevent timesRadial basis functionNeural networksEarthquakes

microstructural and abrasive wear properties of SiC reinforced aluminum-based composite produced by compocasting

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Transactions of Nonferrous metals Society of China 2013年第7期23卷 1905-1914页

作者： Ali mAZAHERY mohsen Ostad shabani Karaj Branch Islamic Azad UniversityKarajIran

The effect of SiC particles reinforcement with average size of 1, 5, 20 and 50 μm and volume fraction of 5%, 10% and 15% on the microstructure and tribological properties of Al-based composite was investigated. Composites were produced by applying compocasting process. Tribological properties of the unreinforced alloy and composites were studied using pin-on-disc wear tester, under dry sliding conditions at different specific loads. The influence of secondary mechanical processing with different rolling reductions on the dry sliding wear characteristics of Al matrix composites was also assessed. Hardness measurement and scanning electron microscopy were used for microstructural characterization and investigation of worn surfaces and wear debris. The proper selection of process parameter such as pouring temperature, stirring speed, stirring time, pre-heated temperature of reinforcement can all influence the quality of the fabricated composites. The porosity level of composite should be minimized and the chemical reaction between the reinforcement and matrix should be avoided.

关键词： aluminum matrix composite hardness wear Al 6061 SiC particles

Engineering microneedle Patches for Improved Penetration:Analysis,Skin models and Factors Affecting Needle Insertion

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Nano-micro Letters 2021年第6期13卷 190-230页

作者： Pooyan makvandi melissa Kirkby Aaron RJHutton majid shabani Cynthia K.Y.Yiu Zahra Baghbantaraghdari Rezvan Jamaledin marco Carlotti Barbara mazzolai Virgilio mattoli Ryan F.Donnelly Istituto Italiano Di Tecnologia Centre for Materials InterfaceViale Rinaldo Piaggio 3456025 PontederaPisaItaly School of Pharmacy Queen’s University Belfast97 Lisburn RoadBelfast BT97BLUK The BioRobotics Institute Scuola Superiore Sant’AnnaViale Rinaldo Piaggio 3456025 PontederaPisaItaly Paediatric Dentistry and Orthodontics Faculty of DentistryThe University of Hong KongPrince Philip Dental HospitalHong Kong SARChina Department of Chemical Materials and Industrial Production EngineeringUniversity of Naples FedericoⅡ80125 NaplesItaly Center for Advanced Biomaterials for Health Care(iit@CRIB) Italian Institute of Technology80125 NaplesItaly

Transdermal microneedle(mN)patches are a promising tool used to transport a wide variety of active compounds into the *** serve as a substitute for common hypodermic needles,mNs must pierce the human stratum corneum(~10 to 20μm),without rupturing or bending during *** ensures that the cargo is released at the predetermined place and ***,the ability of mN patches to sufficiently pierce the skin is a crucial *** the current review,the pain signal and its management during application of mNs and typical hypodermic needles are presented and *** is followed by a discussion on mechanical analysis and skin models used for insertion tests before application to clinical *** that affect insertion(e.g.,geometry,material composition and cross-linking of mNs),along with recent advancements in developed strategies(e.g.,insertion responsive patches and 3D printed biomimetic mNs using two-photon lithography)to improve the skin penetration are highlighted to provide a backdrop for future research.

关键词： Insertion responsive Implantable microneedles Skin indentation Transdermal microneedles Pain management