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Survey on synchrophasor data quali.y and cybersecuri.y challenges, and evaluati.n of thei. i.terdependenci.s

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Journal of Modern Power Systems and Clean Energy 2019年第3期7卷 449-467页

作者： Adi.ya SUNDARARAJAN Tanwi. KHAN amir.MOGHADASi.Ari. i.SARWAT Flori.a i.ternati.nal Uni.ersi.y

Synchrophasor devi.es guarantee si.uati.n awareness for real-ti.e moni.ori.g and operati.nal vi.i.i.i.y of smart gri.. Wi.h thei. wi.espread i.plementati.n,si.ni.i.ant challenges have emerged, especi.lly i. communi.ati.n, data quali.y and cybersecuri.y. The exi.ti.g li.erature treats these challenges as separate problems,when i. reali.y, they have a complex i.terplay. Thi. paper conducts a comprehensi.e revi.w of quali.y and cybersecuri.y challenges for synchrophasors, and i.enti.i.s the i.terdependenci.s between them. i. also summari.es di.ferent methods used to evaluate the dependency and surveys how quali.y checki.g methods can be used to detect potenti.l cyberattacks.

关键词： Synchrophasor Data quali.y Cybersecuri.y Methodology

Temporal Correlati.n-Based Spati.l Fi.teri.g of Ri.i.n Noi.e for Functi.nal MRi.

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Chi.ese Physi.s Letters 2012年第1期29卷 287-290页

作者： amir.A.Khali. i.M.Qureshi.Jawad.A.Shah Department of Electroni. Engi.eeri.g International Islamic UniversityIslamabadPakistan Ai. Uni.ersi.y ISSSIslamabadPakistan

A novel correlati.n-based fi.ter i. presented for de-noi.i.g functi.nal magneti. resonance i.agi.g (fMRi. *** correlati.n-based exponenti.l wei.hts are defi.ed for spati.l smoothi.g of the data,wi.h bi.s reducti.n usi.g esti.ated noi.e *** proposed scheme i. tested on si.ulated and real fMRi.***,the results are compared wi.h conventi.nal *** method i. found to be effecti.ely suppressi.g the Ri.i.n noi.e i. fMRi.data,whi.e i.provi.g the SNR.

关键词： wei.hts smoothi.g Spati.l

CFD si.ulati.n of i.peller shape effect on quali.y of mi.i.g i. two-phase gas–li.ui. agi.ated vessel

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Chi.ese Journal of Chemi.al Engi.eeri.g 2020年第11期28卷 2733-2745页

作者： amir.Hei.ari Process Si.ulati.n and Modeli.g Laboratory(PSMlab) Faculty of ChemicalPetroleum and Gas EngineeringSemnan UniversitySemnan ***Iran

Mi.i.g effi.i.ncy i. two-phase gas–li.ui. agi.ated vessel i. one of the i.portant challenges i. the i.dustri.l *** flui. dynami.s techni.ue(CFD)was used to i.vesti.ate the effect of four di.ferent pi.ched blade i.pellers,i.cludi.g 15°,30°,45°and 60°,on the mi.i.g quali.y of gas–li.ui. agi.ated *** multi.hase flow behavi.r was modeled by Euleri.n–Euleri.n multi.hase approach,and RNG k-εwas used to model the *** CFD results showed that a strong global vortex plays the mai. role on the mi.i.g quali.y of the gas phase i. the *** on the standard devi.ti.n cri.eri.n,i. was observed that the axi.l di.tri.uti.n of the gas phase i. the 30°i.peller i. about 55%better than the *** addi.i.n,the results showed that the 30°i.peller has a uni.orm radi.l di.tri.uti.n over the other i.pellers and the maxi.um gas phase holdup i. the *** of the power consumpti.n of the i.pellers showed that the 30°i.peller has the hi.hest power consumpti.n among the other pi.ched blade ***,exami.e the effect of same power condi.i.n for pi.ched blade i.pellers showed that the 30°i.peller has the best mi.i.g quali.y i. thi. condi.i.n.

关键词： Pi.ched blade i.peller Mi.i.g CFD Multi.hase flow RNG k-εmodel

A Comparati.e Numeri.al Study of Paraboli. Parti.l i.tegro-Di.ferenti.l Equati.n Ari.i.g from Convecti.n-Di.fusi.n

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Computer Modeli.g i. Engi.eeri.g & Sci.nces 2021年第2期126卷 673-692页

作者： Kami. Khan Arshed Ali.Fazal-i.Haq i.taf Hussai. Nudrat amir Department of Mathemati.s Islamia CollegePeshawar25000Pakistan Department of Mathemati.s Statistics and Computer ScienceThe University of AgriculturePeshawar25000Pakistan Department of Basi. Sci.nces&i.lami.t University of Engineering&TechnologyPeshawar25000Pakistan Department of Basi. Sci.nces&Humani.i.s CECOS University of Information Technology and Emerging SciencesPeshawar25000Pakistan

Thi. arti.le studi.s the development of two numeri.al techni.ues for solvi.g convecti.n-di.fusi.n type parti.l i.tegro-di.ferenti.l equati.n(Pi.E)wi.h a weakly si.gular *** tri.onometri. B-spli.e(CTBS)functi.ns are used for i.terpolati.n i. both *** fi.st method i. CTBS based collocati.n method whi.h reduces the Pi.E to an algebrai. tri.i.gonal system of li.ear *** other method i. CTBS based di.ferenti.l quadrature method whi.h converts the Pi.E to a system of ODEs by computi.g spati.l deri.ati.es as wei.hted sum of functi.n *** effi.i.nt tri.i.gonal solver i. used for the soluti.n of the li.ear system obtai.ed i. the fi.st method as well as for determi.ati.n of wei.hti.g coeffi.i.nts i. the second *** expli.i. scheme i. employed as ti.e i.tegrator to solve the system of ODEs obtai.ed i. the second *** methods are tested wi.h three nonhomogeneous problems for thei. ***,computati.nal effi.i.ncy and numeri.al convergence of the methods are *** of errors i. approxi.ati.ns produced by the present methods versus di.ferent values of di.creti.ati.n parameters and convecti.n-di.fusi.n coeffi.i.nts are *** and di.fusi.n domi.ant cases are di.cussed i. terms of Peclet *** results are also compared wi.h cubi. B-spli.e collocati.n method.

关键词： Parti.l i.tegro-di.ferenti.l equati.n convecti.n-di.fusi.n collocati.n method di.ferenti.l quadrature cubi. tri.onometri. B-spli.e functi.ns weakly si.gular kernel

Phase-plane analysi. of test parti.le orbi.s i. regular black holes

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Communi.ati.ns i. Theoreti.al Physi.s 2020年第1期72卷 111-117页

作者： Muhammed amir Astrophysi.s and Cosmology Research Uni. School of MathematicsStatistics and Computer ScienceUniversity of KwaZulu-NatalPrivate Bag X54001Durban 4000South Africa

We i.vesti.ate phase-plane analysi. of general relati.i.ti. orbi.s i. a gravi.ati.nal fi.ld of the Rei.sner–Nordstr?m-type regular black hole *** employ phase-plane analysi. to obtai. di.ferent phase-plane di.grams of the test parti.le orbi.s by varyi.g charge q and di.ensi.nless parameterβ,whereβcontai.s angular momentum of the test *** compute numeri.al values of radi. for the i.nermost stable orbi.s and correspondi.g values of energy requi.ed to place the test parti.le i. *** on,we employ si.i.ar analysi. on an Ayón–Beato–García(ABG)regular black hole and a compari.on regardi.g key results i. also i.cluded.

关键词： black holes modi.i.d gravi.y phase-plane di.grams

Computer-ai.ed desi.n of classi.al li.ear compensators wi.h appli.ati.n to aerospace

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Journal of Systems Engi.eeri.g and Electroni.s 2009年第6期20卷 1373-1377页

作者： amir.Nassi.harand School of Mechani.al Manufacturing & Materials Engineering Univ.of Nottingham-Malaysia Campus Semenyih 43500 Malaysia

A new Matlab functi.n based on a versati.e compensator desi.n approach i. *** functi.n allows desi.n of lead-lag, Pi., proporti.nal plus rate feedback, proporti.nal-i.tegral plus rate feedback, and nth order li.ear *** pri.ary i.puts to thi. functi.n are the plant transfer functi.n and the desi.ed closedloop behavi.r i. terms of an nth order transfer *** output i. the parti.ular compensator *** uni.i.d desi.n approach i. pri.ari.y based on mi.i.i.i.g a mean-squared error type objecti.e *** mi.i.i.ati.n gi.es the compensator parameters i. terms of a set of li.ear si.ultaneous algebrai. *** soluti.n method requi.es the user to i.put such parameters as the lower and upper li.i.s of frequency range of i.terest;such parameters are automati.ally determi.ed by the use of numeri.al *** desi.n method and the associ.ted soft.are are demonstrated by solvi.g a flexi.le satelli.e problem, and the results are compared wi.h those obtai.ed by two other methods reported i. the open li.eratures.

关键词： li.ear systems classi.al control numeri.al analysi. opti.i.ati.n.

Multi.range controller desi.n for hi.hly nonli.ear systems wi.h appli.ati.n to unmanned aeri.l vehi.les

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Journal of Systems Engi.eeri.g and Electroni.s 2010年第3期21卷 491-495页

作者： amir.Nassi.harand School of Mechani.al Manufacturing & Materials EngineeringUniversity of Nottingham-Malaysia Campus

A new procedure for a desi.n of multi.range controllers for use wi.h hi.hly nonli.ear systems i. *** procedure i.volves obtai.i.g the descri.i.g functi.n models of the nonli.ear plant by soft.are followed by desi.ni.g a controller at nomi.al ***,the controller parameters are opti.i.ed to yi.ld a sati.factory closed-loop response at all operati.g ***,the performance and stabi.i.y of the closed-loop system compri.ed of the desi.ned controller and the nonli.ear plant are *** procedure and the associ.ted soft.are are appli.d to a nonli.ear control problem of the sort encountered i. aerospace,and the results are compared wi.h two other approaches.

关键词： control theory opti.i.ati.n descri.i.g functi.ns Fouri.r analysi. stabi.i.ati.n.

General Energy Decay of Soluti.ns for a Weakly Di.si.ati.e Ki.chhoff Equati.n wi.h Nonli.ear Boundary Dampi.g

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Acta Mathemati.ae Appli.atae Si.i.a 2017年第2期33卷 401-408页

作者： amir.Peyravi Department of Mathemati.s College of Sciences Shiraz University Shiraz 71467-13565 Iran

i. thi. arti.le, we study the weak di.si.ati.e Ki.chhoff equati.n under nonli.ear dampi.g on the boundary We prove a general energy decay property for soluti.ns i. terms of coeffi.i.nt of the fri.ti.nal boundary dampi.g. Our result extends and i.proves some results i. the li.erature such as the work by Zhang and Mi.o （2010） i. whi.h only exponenti.l energy decay i. consi.ered and the work by Zhang and Huang （2014） where the energy decay has been not consi.ered.

关键词： Ki.chhoff equati.n general decay boundary dampi.g

Effect of synthesi. soluti.n pH of Co/γ-Al_2O_3 catalyst on i.s catalyti. properti.s for methane conversi.n to syngas

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燃料化学学报 2018年第3期46卷 311-318页

作者： amir.Mosayebi.Reza Abedi.i Department of Chemi.al Engi.eeri.g Tafresh University Faculty of Chemi.al Engi.eeri.g Babol Noshirvani University of Technology

The cobalt nanoparti.les over γ-Al_2O_3 support were prepared vi. chemi.al reducti.n of CoCl_2·6H_2O usi.g NaBH_4 wi.h vari.us values of pH i. the range of 11. 92-13. 80. Synthesi.ed catalysts were studi.d through X-ray di.fracti.n( XRD),N_2 adsorpti.n/desorpti.n( BET),H_2-temperature programmed reducti.n( H_2-TPR),H_2-chemi.orpti.n,O_2 pulse ti.rati.n and temperature programmed oxi.ati.n( TPO) methods. Obtai.ed results exhi.i.ed the synthesi. soluti.n pH showed a si.ni.i.ant i.fluence on the acti.i.y and selecti.i.y i. parti.l oxi.ati.n of methane reacti.n. The methane conversi.n,CO selecti.i.y and H_2 yi.ld were enhanced by i.creasi.g of the synthesi. soluti.n pH. Compared to other catalysts,the catalyst that synthesi.ed at pH of 13.80,showed a superi.r abi.i.y i. syngas producti.n wi.h a H_2/CO rati. of near 2 and also a proper stabi.i.y agai.st deacti.ati.n duri.g the parti.l oxi.ati.n of methane.

关键词：部分氧化 Co/-Al 2 O 3 nanoparti.les 选择 pH 价值