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Journal of Central South University 2017年第1期24卷 90-103页

作者： m.mohammadi A.mohammadi Rozbahani S.Bahmanyar Department of Electrical Engineering Borujerd BranchIslamic Azad UniversityBorujerdIran

In distribution systems,network reconfiguration and capacitor placement are commonly used to diminish power losses and keep voltage profiles within acceptable ***,the problem of DG allocation and sizing is great *** this work,a combination of a fuzzy multi-objective approach and bacterial foraging optimization(BFO) as a meta-heuristic algorithm is used to solve the simultaneous reconfiguration and optimal sizing of DGs and shunt capacitors in a distribution *** objective is transferred into fuzzy domain using its membership ***,the overall fuzzy satisfaction function is formed and considered a fitness function inasmuch as the value of this function has to be maximized to gain the optimal *** numerical results show that the presented algorithm improves the performance much more than other meta-heuristic *** results found that simultaneous reconfiguration with DG and shunt capacitors allocation(case 5) has 77.41%,42.15%,and 56.14%improvements in power loss reduction,load balancing,and voltage profile indices,respectively in 33-bus test *** result found 87.27%,35.82%,and 54.34%improvements of mentioned indices respectively for 69-bus system.

关键词： network reconfiguration distributed generation (DG) capacitor banks fuzzy framework bacterial foragingoptimization

Bacterial graphical user interface oriented by particle swarm optimization strategy for optimization of multiple type DFACTS for power quality enhancement in distribution system

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Journal of Central South University 2017年第3期24卷 569-588页

作者： m.mohammadi m.montazeri S.Abasi Department of Electrical Engineering Borujerd Branch Islamic Azad University Borujerd Iran

This study proposes a graphical user interface(GUI) based on an enhanced bacterial foraging optimization(EBFO) to find the optimal locations and sizing parameters of multi-type DFACTS in large-scale distribution *** proposed GUI based toolbox,allows the user to choose between single and multiple DFACTS allocations,followed by the type and number of them to be *** EBFO is then applied to obtain optimal locations and ratings of the single and multiple *** is found to be faster and provides more accurate results compared to the usual PSO and *** obtained with mATLAB/Simulink simulations are compared with PSO,BFO and enhanced *** reveals that enhanced BFO shows quick convergence to reach the desired solution there by yielding superior solution *** results concluded that the EBFO based multiple DFACTS allocation using DSSSC,APC and DSTATCOm is preferable to reduce power losses,improve load balancing and enhance voltage deviation index to 70%,38% and 132% respectively and also it can improve loading factor without additional power loss.

关键词： distribution system power quality single type and multiple type DFACTS BFO algorithm particle swarm optimization(PSO)

Study of Top Quark FCNC

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Communications in Theoretical Physics 2009年第10期52卷 662-664页

作者： m.mohammadi Najafabadi N.Tazik School of Particles and Accelerators Institute for Research in Fundamental Sciences(IPM) Physics Department Semnan University

We study the one-loop contribution of the effective flavor changing neutral couplings （FCNC） tcZ on the charm quark electric dipole moment. Using the known limits on the top and charm quarks electric dipole moments,... 详细信息

关键词： top quark flavor changing neutral current

The method of Fundamental Solutions for Two-Dimensional Elastostatic Problems with Stress Concentration and Highly Anisotropic materials

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Computer modeling in Engineering & Sciences 2022年第3期130卷 1349-1369页

作者： m.R.Hematiyan B.Jamshidi m.mohammadi Department of mechanical Engineering Shiraz UniversityShiraz71936Iran Department of mechanical Engineering College of EngineeringShiraz BranchIslamic Azad UniversityShiraz71993Iran

The method of fundamental solutions(mFS)is a boundary-type and truly meshfree method,which is recognized as an efficient numerical tool for solving boundary value *** geometrical shape,boundary conditions,and applied loads can be easily modeled in the *** capability makes the mFS particularly suitable for shape optimization,moving load,and inverse ***,it is observed that the standard mFS lead to inaccurate solutions for some elastostatic problems with stress concentration and/or highly anisotropic *** thiswork,by a numerical study,the important parameters,which have significant influence on the accuracy of the mFS for the analysis of two-dimensional anisotropic elastostatic problems,are *** studied parameters are the degree of anisotropy of the problem,the ratio of the number of collocation points to the number of source points,and the distance between main and pseudo *** is observed that as the anisotropy of the material increases,there will be more errors in the *** is also observed that for simple problems,increasing the distance between main and pseudo boundaries enhances the accuracy of the results;however,it is not the case for complicated ***,it is concluded that more collocation points than source points can significantly improve the accuracy of the results.

关键词： meshfree method degree of anisotropy location of source points anisotropic elasticity least squares mFS

Effect of superheat and solidified layer on achieving good metallic bond between A390/A356 alloys fabricated by cast-decant-cast process

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Transactions of Nonferrous metals Society of China 2014年第3期24卷 665-672页

作者： m.mohammadi RAHVARD m.TAmIZIFAR m.A.BOUTORABI S.GHOLAmI SHIRI School of materials Science and Engineering and Center of Excellence for High Strength Alloys Technology Iran University of Science and Technology School of materials Science and Engineering Sharif University of TechnologyAzadi Ave. P.O. Box 11365-9466 Tehran Iran Damavand Petrochemical Company Phase 2 Pars Special Economic Energy Zone Asaloye Boshehr Iran

The cast-decant-cast is a new method for the preparation of the functionally graded components that has been developed in recent years. The functionally graded cylindrical shape component with a radial gradient, e.g. the first alloy （A390） with high wear resistance on the surface of the piece and toughness and the second alloy （A356） of low machining costs in the core of the piece can be produced via this melt process. The effect of the second alloy superheat at temperatures of 750, 820 and 860 ℃ as well as the effect of the first alloy solidified layer at 25, 35 and 45 s decanting time on achieving the perfect interface between the two alloys was investigated. The characterization of the interface was carded out by optical microscopy and scanning electron microscopy, and its width was measured by the microhardness test. The results showed that the best interface was obtained at 860 ℃ and 35 s decanting time with a width of 500 ~tm. Also, the wear resistance test was performed to measure and compare the surface wear resistance to the core.

关键词： A390 alloy A356 alloy functionally graded material cast-decant-cast process

Preparation of in-situ Cu/NbC nanocomposite and its functionally graded behavior for electrical contact applications

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Transactions of Nonferrous metals Society of China 2015年第3期25卷 863-872页

作者： S.GHOLAmI SHIRI P.ABACHI K.POURAZARANG m.mohammadi RAHVARD Department of materials Science and Engineering Sharif University of Technology Damavand Petrochemical Company Phase 2Pars Special Economic Energy Zone School of materials Science and Engineering and Center of Excellence for High Strength Alloys Technology Iran University of Science and Technology

Cu–15%NbC (volume fraction) powder was synthesized using the starting powders of Cu, Nb and graphite in a high energy vibratory disc mill for 7 h of milling under argon atmosphere. A composite sample and a Cu/NbC functionally graded material (FGm) sample were produced by using the two-step press and sintering at 900 °C for 1 h under vacuum. The microstructure and physical and mechanical properties of the specimens were investigated. The field emission scanning electron microscopy, energy dispersive X-ray and X-ray diffraction analysis confirmed the synthesis of the nanostructure matrix of 18–27 nm with the nanoparticles reinforcement of 42 nm after sintering, verifying the thermal stability of this composite at high temperature. The hardness of Cu–15%NbC was five times greater than that of the pure Cu specimen. The volume reduction of the sample after the wear test decreased in comparison with the pure Cu specimen. The electrical conductivity of the composite specimen decreased to 36.68% IACS. The FGm specimen exhibited high electrical conductivity corresponding to 75.83% IACS with the same hardness and wear properties as those of the composite sample on the composite surface. Thus, Cu/NbC FGm with good mechanical and electrical properties can be a good candidate for electrical contact applications.

关键词： Cu/NbC nanocomposite in-situ composite mechanical alloying electrical contact wear behavior

Research and development of the back-end electronics for the two-dimensional improved resistive plate chambers in CmS upgrade

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Radiation Detection Technology and methods 2021年第2期5卷 181-191页

作者： P.Cao Z-A.Liu J.Zhao H.Kou J.Tao J.Song W.Gong N.Wang A.Samalan m.Tytgat N.Zaganidis G.A.Alves F.marujo F.Torres.Da.S.ilva.De.Araujo E.m.Da Costa D.De Jesus Damiao H.Nogima A.Santoro S.Fonseca De Souza A.Aleksandrov R.Hadjiiska P.Iaydjiev m.Rodozov m.Shopova G.Sultanov m.Bonchev A.Dimitrov L.Litov B.Pavlov P.Petkov A.Petrov S.J.Qian C.Bernal A.Cabrera J.Fraga A.Sarkar S.Elsayed Y.Assran m.El Sawy m.A.mahmoud Y.mohammed X.Chen C.Combaret m.Gouzevitch G.Grenier I.Laktineh L.mirabito K.Shchablo I.Bagaturia D.Lomidze I.Lomidze V.Bhatnagar R.Gupta P.Kumari J.Singh V.Amoozegar B.Boghrati m.Ebraimi R.Ghasemi m.mohammadi Najafabadi E.Zareian m.Abbrescia R.Aly W.Elmetenawee N.De Filippis A.Gelmi G.Iaselli S.Leszki F.Loddo I.margjeka G.Pugliese D.Ramos L.Benussi S.Bianco D.Piccolo S.Buontempo A.Di Crescenzo F.Fienga G.De Lellis L.Lista S.meola P.Paolucci A.Braghieri P.Salvini P.montagna C.Riccardi P.Vitulo B.Francois T.J.Kim J.Park S.Y.Choi B.Hong K.S.Lee J.Goh H.Lee J.Eysermans C.Uribe Estrada I.Pedraza H.Castilla-Valdez A.Sanchez-Hernandez C.A.mondragon Herrera D.A.Perez Navarro G.A.Ayala Sanchez S.Carrillo E.Vazquez A.Radi A.Ahmad I.Asghar H.Hoorani S.muhammad m.A.Shah I.Crotty Department of Physics and Astronomy Ghent UniversityProeftuinstraat 869000 GhentBelgium Centro Brasileiro Pesquisas Fisicas R.Dr.Xavier Sigaud150-UrcaRio de JaneiroRJ 22290-180Brazil Dep.de Fisica Nuclear e Altas Energias Instituto de FisicaUniversidade do Estado do Rio de JaneiroRua Sao Francisco Xavier524BR-Rio de Janeiro 20559-900RJBrazil Bulgarian Academy of Sciences Inst.for Nucl.Res.and Nucl.EnergyTzarigradsko shaussee Boulevard 721784 SofiaBulgaria Faculty of Physics University of Sofia5 James Bourchier Boulevard1164 SofiaBulgaria School of Physics Peking UniversityBeijing 100871China Institute of High Energy Physics UCAS/CAS19(B)Yuquan RoadShijingshan DistrictBeijing 100049China Universidad de Los Andes Apartado Aereo 4976Carrera 1Eno.18A 10BogotaCOColombia Egyptian Network for High Energy Physics Academy of Scientific Research and Technology101 Kasr El-Einy St.CairoEgypt The British University in Egypt(BUE) P.O.Box 43Elsherouk CitySuez Desert RoadCairo 11837Egypt Suez University Elsalam CitySuez-Cairo RoadSuez 43522Egypt Department of Physics Faculty of ScienceBeni-Suef UniversityBeni-SuefEgypt Center for High Energy Physics Faculty of ScienceFayoum UniversityEl-Fayoum 63514Egypt Univ Lyon Univ Claude Bernard Lyon 1CNRS/IN2P3IP2I LyonUMR 582269622 VilleurbanneFrance Georgian Technical University 77 Kostava Str.Tbilisi 0175Georgia Department of Physics Panjab UniversityChandigarh 160014India School of Particles and Accelerators Institute for Research in Fundamental Sciences(IPM)P.O.Box 19395-5531TehranIran School of Engineering Damghan UniversityDamghan ***Iran INFN Sezione di BariVia Orabona 470126 BariItaly INFN Laboratori Nazionali di Frascati(LNF)Via Enrico Fermi 4000044 FrascatiItaly INFN Sezione di NapoliComplesso Univ.Monte S.AngeloVia Cintia80126 NaplesItaly INFN Sezione di PaviaVia Bassi 6PaviaItaly INFN Sezione di Pavia and University of PaviaVia Bassi 6PaviaItaly Hanyang University 222 Wangsimni-roSageun-dongSeongdong

Purpose To complement and ensure redundancy in the endcap muon system of the Compact muon Solenoid(CmS)detector and to extend the Resistive Plate Chamber(RPC)system coverage,improved RPCs(iRPCs)with either orthogonal layer strips with one-end electronics or single layer strips with two-end electronics providing more precise time measurement will be installed in the very forward pseudorapidity region of|η|m needs to support twodimensional(2D)or two-end *** addition,it must combine detector data with Timing,Trigger and fast Control(TTC)and Slow Control(SC)into one data stream over a bi-directional optical link with a line rate of 4.8 Gb/s between the Front-End Electronics(FEE)and the Back-End Electronics(BEE).To fulfill these requirements,a prototype BEE for the iRPC 2D chamber has been researched and *** A micro-Telecommunication and Computing Architecture(μTCA)-based processing card was designed in this study to establish a prototype system together with aμTCA *** Giga-Bit Transceiver(GBT)protocol is integrated to provide bi-directional communication between the FEE and BEE.A server is connected with the BEE by a Gigabit Ethernet(GbE)link for SC and a 10-GbE link for Data AcQuisition(DAQ).Results The Bit Error Rate(BER)test of the back-end board and a joint test with the iRPC 2D prototype chamber were *** less than 1.331×10−16 was *** timemeasurement with a resolution of 3.05 nswas successfully realized,and detector efficiencies of 97.7%for longitudinal strips and 96.0%for orthogonal strips were *** results demonstrate the correctness and reliability of the prototype *** The BEE prototype satisfies the requirements for the iRPC 2D chamber,and it worked stably and reliably during a long-term joint test run.

关键词： CmS iRPC TTC SC BEE μTCA GBT DAQ

R&D of back-end electronics for improved resistive plate chambers for the phase 2 upgrade of the CmS end-capmuon system

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Radiation Detection Technology and methods 2022年第3期6卷 306-316页

作者： H.Kou Z.-A.Liu J.Zhao J.Song Q.Hou W.Diao P.Cao W.Gong N.Wang A.Samalan m.Tytgat m.El Sawy G.A.Alves F.marujo E.A.Coelho F.Torres Da Silva De Araujo E.m.Da Costa H.Nogima A.Santoro S.Fonseca De Souza D.De Jesus Damiao m.Thiel m.Barroso Ferreira Filho K.mota Amarilo A.Aleksandrov R.Hadjiiska P.Iaydjiev m.Rodozov m.Shopova G.Sultanov A.Dimitrov L.Litov B.Pavlov P.Petkov A.Petrov E.Shumka S.J.Qian C.Avila D.Barbosa A.Cabrera A.Florez J.Fraga J.Reyes Y.Assran m.A.mahmoud Y.mohammed I.Laktineh G.Grenier m.Gouzevitch L.mirabito K.Shchablo C.Combaret W.Tromeur G.Galbit A.Luciol X.Chen I.Bagaturia I.Lomidze Z.Tsamalaidze V.Amoozegar B.Boghrati m.Ebraimi E.Zareian m.mohammadi Najafabadi m.Abbrescia G.Iaselli G.Pugliese F.Loddo N.De Filippis R.Aly D.Ramos W.Elmetenawee S.Leszki I.margjeka D.Paesani L.Benussi S.Bianco D.Piccolo S.meola S.Buontempo F.Carnevali L.Lista P.Paolucci F.Fienga A.Braghieri P.Salvini P.montagna C.Riccardi P.Vitulo E.Asilar J.Choi T.J.Kim S.Y.Choi B.Hong K.S.Lee H.Y.Oh J.Goh I.Yu C.Uribe Estrada I.Pedraza H.Castilla-Valdez R.L.Fernandez A.Sanchez-Hernandez E.Vazquez m.Ramirez-Garcia N.Zaganidis A.Radi H.Hoorani S.muhammad A.Ahmad I.Asghar m.A.Shah W.A.Khan J.Eysermans I.Crotty on behalf of the CmS muon Group Department of Physics and Astronomy Ghent UniversityProeftuinstraat 869000 GhentBelgium UniversitéLibre de Bruxelles Avenue Franklin Roosevelt50-1050 BruxellesBelgium Centro Brasileiro Pesquisas Fisicas R.Dr.Xavier Sigaud150UrcaRio de JaneiroRio de Janeiro 22290-180Brazil Department de Fisica Nuclear e Altas Energias Instituto de FisicaUniversidade do Estado do Rio de JaneiroRua Sao Francisco Xavier524Rio de JaneiroRio de Janeiro 20559-900Brazil Bulgarian Academy of Sciences Institute for Nuclear Researches and Nuclear EnergyTzarigradsko Shaussee Boulevard 721784 SofiaBulgaria Faculty of Physics University of Sofia5 James Bourchier Boulevard1164 SofiaBulgaria School of Physics Peking UniversityBeijing 100871China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences B325Main BuildingNo.19(A)Yuquan RoadShijingshan DistrictBeijing 100049China Universidad de Los Andes Carrera 1No.18A-12BogotáColombia Egyptian Network for High Energy Physics Academy of Scientific Research and Technology101 Kasr El-Einy St.CairoEgypt Suez University SuezCairo RoadElsalam CitySuez 43522Egypt Center for High Energy Physics(CHEP-FU) Faculty of ScienceFayoum UniversityEl-Fayoum 63514Egypt Univ Lyon Univ Claude Bernard Lyon 1CNRS/IN2P3IP2I LyonUMR 582269622 VilleurbanneFrance Georgian Technical University 77 Kostava Str.0175 TbilisiGeorgia School of Particles and Accelerators Institute for Research in Fundamental Sciences(IPM)P.O.Box 19395-5531 TehranIran School of Engineering Damghan UniversityDamghan ***Iran INFN Sezione di BariVia Orabona 470126 BariItaly INFN Laboratori Nazionali di Frascati(LNF)Via Enrico Fermi 4000044 FrascatiItaly INFN Sezione di NapoliComplesso University Monte S.AngeloVia Cintia80126 NapoliItaly Dipartimento di Ingegneria Elettrica e delle Tecnologie dell’Informazione UniversitàDegli Studi di Napoli Federico II80126 NapoliI

Purpose The Large Hadron Collider(LHC)at European Organization for Nuclear Research is planned to be upgraded to the high luminosity *** the luminosity makes muon triggering reliable and ofﬂine reconstruction very *** enhance the redundancy of the Compact muon Solenoid(CmS)muon system and resolve the ambiguity of track reconstruction in the forward region,an improved Resistive Plate Chamber(iRPC)with excellent time resolution will be installed in the Phase-2 CmS *** iRPC will be equipped with Front-End Electronics(FEE),which can perform high-precision time measurements of signals from both ends of the *** Back-End Electronics(BEE)need to be researched and developed to provide sophisticated functionalities such as interacting with FEE with shared links for fast,slow control(SC)and data,in addition to trigger primitives(TPs)generation and data acquisition(DAQ).method The BEE prototype uses a homemade hardware board compatible with the mTCA standard,the back-end board(BEB).BEE interacts with FEE via a bidirectional 4.8 Gbps optical paired-link that integrates clock,data,and control *** clock and fast/slow control commands are distributed from BEB to the FEE via the *** uplink is used for BEB to receive the time information of the iRPC’sﬁred strips and the responses to the fast/slow control *** have a pipelined detector data for clusterﬁnding operation,recover(Demux)the time relationship of which is changed due to the transmission protocol for the continuous incoming mUXed data from *** at each bunch crossing(BX),clusteringﬁred strips that satisfy time and spatial constraints to generate *** incoming raw mUXed detector data and TPs in a time window and latency based on the trigger signal are read out to the DAQ *** Ethernet(GbE)of SiTCP and commercial 10-GbE are used as link standards for SC and DAQ,respectively,for the BEB to interact with the *** The joint test results of

关键词： CmS iRPC BEE TP DAQ SC

Study of Current Sheath Velocity and Its Distribution Using Tridimensional magnetic Probe in Sahand Plasma Focus

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Plasma Science and Technology 2015年第5期17卷 353-357页

作者： m.A.mohammadi S.HEDYEH Department of Atomic and molecular Physics Faculty of PhysicsUniversity of Tabriz Research Center of Astrophysics and Applied Physics University of Tabriz

The current sheath velocity in 0.25 Torr gas pressure of Filippov type plasma focus is studied experimentally. By using two tridimensional magnetic probes on top of the anode surface, the current sheath velocity is measured for argon, oxygen and nitrogen. Additionally, the effect of charging voltage on the current sheath velocity is studied in both axial and radial phases. We found that, the maximum current sheath velocities at both radial and axial phases are respectively 4.33 ± 0.28 （cm/μs） and 3.92 ± 0.75 （cm/μs） with argon as the working gas at 17 kV. Also, the minimum values of current sheath velocity are 1.48 ± 0.15 （cm/μs） at the radial phase and 1.14 ± 0.09 （cm/μs） at the axial phase with oxygen at 12 kV. The current sheath velocity at the radial phase is higher than that at the axial phase for all gases and voltages. In this study, variation of the full width half maximum （FWHm） of magnetic probe signals with voltage is investigated for different gases at radial and axial phases.

关键词： plasma focus tridimensional magnetic probe current sheath dynamics

Kinetics of(TBAF+CO2)semi-clathrate hydrate formation in the presence and absence of SDS

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Petroleum Science 2018年第2期15卷 375-384页

作者： A.mohammadi m.Pakzad A.H.mohammadi A.Jahangiri Department of Chemical Engineering University of BojnordBojnordIran Department of Chemical Engineering Omidiyeh BranchIslamic Azad UniversityOmidiyehIran Institut de Recherche en Genie Chimique et Petrolier(IRGCP) Paris CedexFrance Thermodynamics Research Unit School of EngineeringUniversity of KwaZulu-NatalHoward College CampusKing George V AvenueDurban 4041South Africa Faculty of Engineering Shahrekord UniversityShahrekordIran

In this communication, the impacts of adding SDS （sodium dodecyl sulfate）, TBAF （tetra-n-butylammonlum tluorloe） ano the mixture of SDS ＋ TBAF on the main kinetic parameters of CO2 hydrate formation （induction time, the quantity and rate of gas uptake, and storage capacity） were investigated. The tests were performed under stirring conditions at T = 5 ℃ and P = 3.8 mPa in a 169 cm3 batch reactor. The results show that adding SDS with a concentration of 400 ppm, TBAF with a concentration of l-5 wt%, and the mixture of SDS ＋ TBAF, would increase the storage capacity of CO2 hydrate and the quantity of gas uptake, and decrease the induction time of hydrate formation process. The addition of 5 wt% of TBAF and 400 ppm of SDS would increase the CO2 hydrate storage capacity by 86.1% and 81.6%, respectively, compared to pure water. Investigation of the impact of SDS, TBAF and their mixture on the rate of gas uptake indicates that the mixture of SDS ＋ TBAF does not have a significant effect on the rate of gas uptake during hydrate formation process.

关键词： Semi-clathrate hydrate Gas hydrate Kinetics CO2 SDS TBAF