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Spa.ning Simplicia. Complex of Wheel Gra.h Wn

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a.gebra.Colloquium 2019年第2期26卷 309-320页

作者： a. zahid M.U. Sa.eem a. Ka.hif M. Kha. M.a. Mera. R. Irfa. Depa.tment of Ma.hema.icsf University of Exluca.ion Lahore Pakistan University of Ma.a.ement a.d Technology Lahore Pakistan Depa.tment of Ma.hema.ics University of Education Lahore Pakistan Depa.tment of Ma.hema.ics COMSATS University Islamabad Sahiwal Campus Sahiwal Pakistan

In this pa.er, we explore the spa.ning simplicia. complex of wheel gra.h Wn on vertex set [n]. Combina.oria. properties of the spa.ning simplicia. complex of wheel gra.h a.e discussed, which a.e then used to compute the f-vector a.d Hilbert series of fa.e ring k[Δs(Wn)] for the spa.ning simplicia. complex Δs(Wn). Moreover, the a.socia.ed primes of the fa.et idea. IF(Δs(Wn)) a.e a.so computed.

关键词： simplicia. complexes spa.ning trees spa.ning simplicia. complexes f-vectors Hilbert series vertex covers

Friction stir welding of a.uminum to copper—a. overview

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Tra.sa.tions of Nonferrous Meta.s Society of China 2017年第10期27卷 2113-2136页

作者： Nidhi SHa.Ma.zahid a.KHa. a.sha. Noor SIDDIQUEE Depa.tment of Mecha.ica. Engineering Jamia Millia Islamia New Delhi India

Components ma.e by joining different ma.eria.s a.e required in va.ious engineering *** of suchcomponents is a.cha.lenging ta.k due to the va.t difference in mecha.ica.,therma. a.d electrica. properties of the ma.eria.s *** stir welding(FSW)is ca.a.le of joining dissimila. ma.eria.s such a. a.uminum(a.)a.d copper(Cu)a.d thereforeresea.chers ha.e used this novel process for dissimila. ***,severa. works perta.ning to dissimila. joining,specifica.ly a.?Cu,a.e a.a.la.le in the litera.ure but they a.e sca.tered in different sources,which ma.es the ta.k of ga.heringinforma.ion a.out dissimila. FSW of a.?Cu *** work ha. been written with a. a.m to provide a.l pertinentinforma.ion rela.ed to dissimila. FSW of a.?Cu a. one pla.e to ea.e the problems of *** comprehensively covers a.dsumma.izes the topics such a. the effect of tool design a.d geometry,FSW process pa.a.eters,FSW stra.egies on mecha.ica.properties,microstructure a.d forma.ion of defects during dissimila. FSW of a.?*** a.dition,it a.so presents a.d discussessevera. va.ia.ts of dissimila. FSW of a.?***,this work not only puts forth ma.or findings of the previous resea.chers but a.sosuggests future recommenda.ions for dissimila. FSW of a.?Cu.

关键词： a.uminium copper friction stir welding intermeta.lic compounds mecha.ica. properties weld nugget zone

Review on underwa.er friction stir welding: a.va.ia.t of friction stir welding with grea. potentia. of improving joint properties

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Tra.sa.tions of Nonferrous Meta.s Society of China 2018年第2期28卷 193-219页

作者： Mohd.a.if Wa.ID zahid a.KHa. a.sha. Noor SIDDIQUEE Depa.tment of Mecha.ica. Engineering Jamia Millia Islamia

Friction stir welding（FSW） is a.solid-sta.e welding process which is ca.a.le of joining ma.eria.s which a.e rela.ively difficult to be welded by fusion welding process. Further, this process is highly energy-efficient a.d environmenta.-friendly a. compa.ed to the fusion welding. Despite severa. a.va.ta.es of FSW over fusion welding, the therma. cycles involved in FSW ca.se softening in joints genera.ly in hea.-trea.a.le a.uminum a.loys（a.s） due to the dissolution or coa.sening of the strengthening precipita.es lea.ing to decrea.e in mecha.ica. properties. Underwa.er friction stir welding（UFSW） ca. be a.process of choice to overcome these limita.ions. This process is suita.le for a.loys tha. a.e sensitive to hea.ing during the welding a.d is widely used for hea.-trea.a.le a.s. The purpose of this a.ticle is to provide comprehensive litera.ure review on current sta.us a.d development of UFSW a.d its importa.ce in compa.ison to FSW with a. a.m to discuss a.d summa.ize different a.pects of UFSW. Specific a.tention is given to ba.ic principle including ma.eria. flow, tempera.ure genera.ion, process pa.a.eters, microstructure a.d mecha.ica. properties. From the review, it is concluded tha. UFSW is a. improved method compa.ed with FSW for improving joint strength. a.a.emicia.s, resea.chers a.d pra.titioners would be benefitted from this a.ticle a. it compiles significa.tly importa.t knowledge perta.ning to UFSW.

关键词： a.uminum friction stir welding fusion welding mecha.ica. properties microstructure underwa.er friction stir welding

a.a.ysis of defects in clea. fa.rica.ion process of friction stir welding

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Tra.sa.tions of Nonferrous Meta.s Society of China 2017年第7期27卷 1507-1516页

作者： Noor Za.a. KHa. zahid a.KHa. a.sha. Noor SIDDIQUEE a.dulra.ma. M.a.-a.Ma.I Mustufa.H.a.IDI Depa.tment of Mecha.ica. Engineering Jamia Millia Islamia (A Central University) New Delhi PIN-110025 India Princess Fa.ima.a.nijris Resea.ch Cha.r for a.va.ced Ma.ufa.turing Technology Advanced Manufacturing Institute King Saud University Riyadh-11421 Saudi Arabia

Striving for clea.er production is a.sought-a.ter ma.ufa.turing *** stir welding(FSW)is a.joiningtechnique with pa. excellence a.d fa. less inva.ive to the environment tha. even best conventiona. welding *** is energyefficient a.d free from consuma.les,a.fluent a.d *** is,thus,a.cepted a. a.clea. welding process tha. ca. producea.cepta.le qua.ity *** suffers from some ma.or cha.lenges of defects of its own kind tha. subject the process open toimprovements so a. to prove itself a.relia.le production *** study presents a.holistic cha.a.teriza.ion of defects commonlyfound in FSW *** finding of the present study revea.s tha. most defects a.e ca.sed by ina.equa.e hea. genera.ion,improperma.eria. movement a.ound the pin a.d ina.equa.e ma.eria. consolida.ion behind the *** a.ount of hea. genera.ion a.dma.eria. stirring depends on severa. FSW pa.a.eters which ma. lea. to the defect forma.ion,if not selected *** resultsreported in this work a.e derived from sound litera.ure support a.d *** a.e ma.e in the form ofcha.a.teristics of defects such a. likelihood of their loca.ion,ma.n responsible pa.a.eters a.ong with the recommenda.ions forminimizing them.

关键词： clea. welding process friction stir welding defect process pa.a.eter

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ERP系统在中国企业实施的关键成功要素

中国管理信息化 2013年第19期16卷 57-59页

作者： Muha.ma. a.mir Oba.d Kha.ta. 佘元冠李秋梦 zahid a. Memon Na.sheen Sa.ed Muha.ma. Irfa. 北京科技大学东凌经济管理学院北京100083 北京理工大学经济管理学院北京100081 北京交通大学经济管理学院北京100044

本文定性研究关键成功因素法(CSF)与ERP系统在中国企业实施的相互联系,该研究主要采用多案例研究方法,数据通过对4个组织进行问卷调查获得。5个命题是基于现有文献中归纳的确定因素提出的,并且这些命题已经在其他案例研究中得到了证实... 详细信息

本文定性研究关键成功因素法(CSF)与ERP系统在中国企业实施的相互联系,该研究主要采用多案例研究方法,数据通过对4个组织进行问卷调查获得。5个命题是基于现有文献中归纳的确定因素提出的,并且这些命题已经在其他案例研究中得到了证实。本研究旨在探讨,以往的学术研究中得到认同的关键成功因素法,在中国企业实施ERP系统的情况下,是否值得慎重考虑。研究结果表明,在实施ERP系统的情况下,培训的质量和数量,高层管理的支持和参与以及供应商的支持,这3个因素十分重要并且是中国企业的实际考核因素。

关键词：关键成功因素法企业资源规划建议问卷调查法多案例研究法

Experimenta. a.d a.a.ytica. a.sessment of the hypervelocity impa.t da.a.e of GLa.s fiber REinforced a.uminum

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Defence Technology（防务技术） 2022年第7期18卷 1232-1246页

作者： Md.zahid Ha.a. Ba.gla.esh a.r Force a.a.emy Bangladesh Air Force Base Matiur RahmanBAF Academy Road7404 JessoreKhulnaBangladesh

This a.ticle a.dresses the response of GLa.s fiber REinforced a.uminum to hypervelocity impa.ts of micrometeoroid a.a.ogs a. impa.t velocities of 7 km/s a.d *** rela.ion,the da.a.e modes of different GLa.s fiber REinforced a.uminum configura.ions ha.e been *** GLa.s fiber REinforced a.uminum configura.ions comprised six to twelve va.ia.ly thick a.uminum la.ers a.d up to four plies of gla.s fiber reinforced epoxy per composite *** impa.t experiments ha.e been conducted with the help of a.two-sta.e light-ga. gun,wherein a.uminum-a.d sta.nless steel projectiles were la.nched a. velocities up to 7.15 km/*** inspection of the da.a.e a.ea.suggested the dissipa.ion of impa.t energy in ela.tic-pla.tic deforma.ion,peta.ling,dela.ina.ion,debonding,tensile fa.lure of fibers,a.d pyrolysis of epoxy.a.preva.ling da.a.e mode wa. not a.pa.ent *** qua.i-isotropic ply orienta.ion of S2-gla.s/FM94-epoxy la.ina.es promoted the interference of shocka.d ra.efa.tion wa.es a.d suppressed the da.a.e a.ea.of GLa.s fiber REinforced *** discrimina.e between the impa.t performa.ce of different GLa.s fiber REinforced a.uminum configura.ions,the energy dissipa.ed in different da.a.e modes of GLa.s fiber REinforced a.uminum ha. been a.sessed *** terms of norma.ized energy,the cross-ply GLa.s fiber REinforced a.uminum dissipa.ed higher energy in peta. forma.ion tha. in other prima.y da.a.e *** norma.ized peta.ling energy wa. found to decline with the increa.e of impa.t *** outcomes of this study will help to optimize the GLa.s fiber REinforced a.uminum la.ina.e,which will be employed a. a.bumper shield to prevent the fa.a. da.a.e a.d the unzipping of a.spa.ecra.t pressure bulkhea..

关键词： Hypervelocity impa.t Peta.ling Fiber fa.lure Volumetric compression Sublima.ion of epoxy

a.Multi-Hop Moving Zone(MMZ) Clustering Scheme Ba.ed on Cellula.-V2X

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China.Communica.ions 2018年第7期15卷 55-66页

作者： zahid Kha. Pingzhi Fa. Key La.ora.ory of Informa.ion Coding a.d Tra.smission School of Information Science and TechnologySouthwest Jiaotong University

a.clustering scheme ba.ed on pure V2V communica.ions ha. two prominent issues i.e. broa.ca.t storm a.d network disconnection. The a.plica.ion of the fifth genera.ion(5G) technology to vehicula. networks is a. optima. choice due to its wide covera.e a.d low la.ency fea.ures. In this pa.er, a.Multihop Moving Zone(MMZ) clustering scheme is proposed by combining IEEE 802.11p with the 3rd Genera.ion Pa.tnership Project(3GPP) 5G cellula. technology. In MMZ, vehicles a.e clustered up-to three hops using V2V communica.ions ba.ed on IEEE 802.11 p a.ming to reduce excessive cellula. ha.d-off cost. While the zona. hea.s(ZHs) i.e. cluster hea.s(CHs) a.e selected by cellula.-V2X(C-V2X) on the ba.is of multi-metrics i.e. rela.ive speed, dista.ce a.d link life time(LLT). The ma.n goa. of MMZ is to form sta.le clusters a.hieving high pa.ket delivery a.d low la.ency. The simula.ion results using ns3 show tha., 5G wide ra.ge technology significa.tly improves the sta.ility of MMZ in term of ZH dura.ion a.d cha.ge ra.e. The a.era.e Da.a.Pa.ket Delivery Ra.io(DPDR) a.d E2E la.ency a.e a.so improved a. compa.ed to the existing clustering schemes.

关键词： clustering 3GPP 5G cluster hea. sta.le clusters relia.ility a.d la.ency

Hybrid DFT study of structura.,electronic,ma.netic a.d ela.tic properties of la.es pha.e bina.y intermeta.lics RFe_(2)(R=La.Ce,Pr a.d Nd)

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Journa. of Ra.e Ea.ths 2023年第9期41卷 1367-1375,I0004页

作者： Mura. Mura. zahid a.i Muha.ma. Idrees Centre for Computa.iona. Ma.eria.s Science Department of PhysicsUniversity of MalakandChakdaraDir(Lower)18800KPPakistan

Hybrid density functiona. theory wa. used to investiga.e the structura.,electronic,ma.netic a.d ela.tic properties of the La.es pha.e bina.y intermeta.lics RFe_(2)(R=La.Ce,Pr a.d Nd) in C_(15) crysta. *** ca.cula.ed la.tice consta.ts of these ma.eria.s a.e found in good a.reement with the *** ba.d structures a.d density of sta.es distribution confirm the meta.lic na.ure of a.l these *** optimized energies in different ma.netic pha.es a.d ma.netic susceptibilities by postDFT trea.ments confirm tha. a.l the understudy compounds a.e ferroma.netic in *** pa.a.eters were ca.cula.ed from the cubic ela.tic coefficients C_(11),C_(12) a.d C_(44).The ela.tic properties revea. tha. these intermeta.lics a.e incompressible,ductile,ela.tica.ly a.isotropic a.d mecha.ica.ly *** on the meta.lic na.ure a.d ferroma.netic properties,it is expected tha. these intermeta.lics a.e suita.le ma.eria.s for spintronic technology.

关键词： Intermeta.lics La.es pha.e Density functiona. theory Electronic ba.d structures Ma.netic properties Ela.tic properties

a.LP-DL—a.Novel a.proa.h Employing Lightweight Deep Lea.ning Fra.ework for Optimizing a.cident Severity Level Prediction

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Computers, Ma.eria.s & Continua 2024年第2期78卷 2535-2555页

作者： Sa.a.a.a. zahid Mehmood Depa.tment of Softwa.e Engineering University of Engineering and TechnologyTaxila47050Pakistan Depa.tment of Computer Engineering University of Engineering and TechnologyTaxila47050Pakistan

Highwa. sa.ety resea.chers focus on cra.h injury severity,utilizing deep lea.ning—specifica.ly,deep neura. networks(DNN),deep convolutiona. neura. networks(D-CNN),a.d deep recurrent neura. networks(D-RNN)—a. the preferred method for modeling a.cident *** lea.ning’s strength lies in ha.dling intrica.e rela.ion-ships within extensive da.a.ets,ma.ing it popula. for a.cident severity level(a.L)prediction a.d *** prior success,there is a.need for a. efficient system recognizing a.L in diverse roa. *** a.dress this,we present a. innova.ive a.cident Severity Level Prediction Deep Lea.ning(a.LP-DL)fra.ework,incorpora.ing DNN,D-CNN,a.d D-RNN models fine-tuned through itera.ive hyperpa.a.eter selection with Stocha.tic Gra.ient *** fra.ework optimizes hidden la.ers a.d integra.es da.a.a.gmenta.ion,Ga.ssia. noise,a.d dropout regula.iza.ion for improved *** a.d fa.tor contribution a.a.yses identify influentia. *** on three diverse cra.h record da.a.a.es—NCDB 2018–2019,UK 2015–2020,a.d US 2016–2021—the D-RNN model excels with a. a.C score of 89.0281%,a.Roc a.ea.of 0.751,a. F-estima.e of 0.941,a.d a.Ka.pa.score of 0.0629 over the NCDB *** proposed fra.ework consistently outperforms tra.itiona. methods,existing ma.hine lea.ning,a.d deep lea.ning techniques.

关键词： Injury severity prediction deep lea.ning fea.ure