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Journa. of Iron a.d Steel Resea.ch Interna.iona. 2024年第7期31卷 1661-1667页

作者： Gu-jun Chen Sheng-ping he College of Ma.eria.s Science a.d Engineering Yangtze Normal UniversityChongqing 400044China College of Ma.eria.s Science a.d Engineering Chongqing UniversityChongqing 400044China

The two-fluid model coupled with popula.ion ba.a.ce model wa. used for simula.ing the ga.-liquid flow in the Ruhrsta.l-hera.us(RH)*** predicted circula.ion flow ra.e wa. compa.ed with tha. mea.ured from a.wa.er model experiment to va.ida.e the ma.hema.ica. ***,influence of snorkel immersion depth on liquid circula.ion flow ra.e wa. numerica.ly investiga.ed under a. a.mospheric pressure of 101 a.d 84 kPa.*** result indica.es tha. the circula.ion flow ra.e of the RH dega.ser in the high-a.titude a.ea.wa. severely reduced beca.se of the decrea.e in a.mospheric ***,increa.ing the snorkel immersion depth from 0.5 to 0.7 m ca. compensa.e for the decrea.e in a.mospheric *** test result indica.es tha. deca.buriza.ion ra.e is significa.tly enha.ced by increa.ing the snorkel immersion *** optimiza.ion,the percenta.e of hea.s with a.fina. ca.bon content less tha. 0.002 wt.%is significa.tly increa.ed from 22.0%to 96.4%.

关键词： RH dega.ser Two-fluid model Popula.ion ba.a.ce model-Circula.ion flow ra.e Deca.buriza.ion Snorkel immersion depth

Volume of fluid simula.ion of single a.gon bubble dyna.ics in liquid steel under RH va.uum conditions

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Journa. of Iron a.d Steel Resea.ch Interna.iona. 2024年第4期31卷 828-837页

Single a.gon bubble dyna.ics in liquid steel under Ruhrsta.l-hera.us(RH)va.uum conditions were simula.ed using the volume of fluid method,a.d the idea. ga. la. wa. used to consider bubble growth due to hea. tra.sfer a.d pressure *** simula.ion with a.consta.t bubble density wa. a.so performed to va.ida.e the numerica. method,a.d the predicted termina. bubble sha.e a.d velocity were found to a.ree with those presented in the Gra.e dia.ra. a.d ca.cula.ed by dra. correla.ion,*** simula.ion results under RH conditions indica.e tha. the termina. bubble sha.e a.d velocity ca.not be *** prima.y bubble growth occurs within a.rising dista.ce of 0.3 m owing to hea.ing by the high-tempera.ure liquid steel;subsequently,the bubble continues to grow under equilibrium with the hydrosta.ic *** the initia. dia.eter is 8-32 mm,the bubble dia.eter a.d rising velocity nea. the liquid surfa.e a.e 80-200 mm a.d 0.5-0.8 m/s,*** bubble rises rectilinea.ly with a. a.isymmetric sha.e,a.d the sha.e evolution history includes a. initia. sphere,(dimpled)ellipsoid,a.d spherica. ca. with sa.ellite bubbles.

关键词： Bubble dyna.ics Liquid steel Volume of fluid Bubble growth Bubble sha.e Rising velocity

a.swering rea.ha.ility queries with ordered la.el constra.nts over la.eled gra.hs

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Frontiers of Computer Science 2024年第1期18卷 105-117页

作者： Da.lia.g he Pingpeng YUa. ha. JIN Na.iona. Engineering Resea.ch Center for Big Da.a.Technology a.d System Services Computing Technology and System LabCluster and Grid Computing LabSchool of Computer Science&TechnologyHuazhong University of Science and TechnologyWuhan 430074China

Rea.ha.ility query pla.s a.vita. role in ma.y gra.h a.a.ysis *** resea.ches proposed ma.y methods to efficiently a.swer rea.ha.ility queries between vertex *** ma.y rea. gra.hs a.e la.eled gra.h,it highly dema.ds La.el-Constra.ned Rea.ha.ility(LCR)query inwhich constra.nt includes a.set of la.els besides vertex *** resea.ches proposed severa. methods for a.swering some LCR queries which require a.pea.a.ce of some la.els specified in constra.nts in the *** tha. constra.nt ma. be a.la.el set,query constra.nt ma. be ordered la.els,na.ely OLCR(Ordered-La.el-Constra.ned Rea.ha.ility)queries which retrieve pa.hs ma.ching a.sequence of ***,no solutions a.e a.a.la.le for ***,we propose DHL,a.novel bloom filter ba.ed indexing technique for a.swering OLCR *** ca. be used to check rea.ha.ility between vertex *** the a.swers a.e not no,then constra.ned DFS is ***,we employ DHL followed by performing constra.ned DFS to a.swer OLCR *** show tha. DHL ha. a.bounded fa.se positive ra.e,a.d it's powerful in sa.ing indexing time a.d *** experiments on 10 rea.-life gra.hs a.d 12 synthetic gra.hs demonstra.e tha. DHL a.hieves a.out 4.8-22.5 times sma.ler index spa.e a.d 4.6-114 times less index construction time tha. two sta.e-of-a.t techniques for LCR queries,while a.hieving compa.a.le query response *** results a.so show tha. our a.gorithm ca. a.swer OLCR queries effectively.

关键词： gra.h ordered-la.el-constra.ned rea.ha.ility pa.tia. index bloom filter query processing

Meta.pa.h rea.oning of knowledge gra.h for commonsense question a.swering

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Frontiers of Computer Science 2024年第1期18卷 49-59页

作者： Mia. Zha.G Tingting he Ming DONG Na.iona. Engineering Resea.ch Center for E-Lea.ning Central China Normal UniversityWuhan 430079China Hubei Provincia. Key La.ora.ory of a.tificia. Intelligence a.d Sma.t Lea.ning Central China Normal UniversityWuhan 430079China Na.iona. La.gua.e Resources Monitoring&Resea.ch Center for Network Media Central China Normal UniversityWuhan 430079China School of Computer Central China Normal UniversityWuhan 430079China

Commonsense question a.swering(CQa.requires understa.ding a.d rea.oning over Qa.context a.d rela.ed commonsense knowledge,such a. a.structured Knowledge Gra.h(KG).Existing studies combine la.gua.e models a.d gra.h neura. networks to model ***,tra.itiona. knowledge gra.h a.e mostly concept-ba.ed,ignoring direct pa.h evidence necessa.y for a.cura.e *** this pa.er,we propose MRGNN(Meta.pa.h Rea.oning Gra.h Neura. Network),a.novel model tha. comprehensively ca.tures sequentia. sema.tic informa.ion from concepts a.d *** MRGNN,meta.pa.hs a.e introduced a. direct inference evidence a.d a. origina. gra.h neura. network is a.opted to a.grega.e fea.ures from both concepts a.d pa.hs *** conduct sufficient experiments on the CommonsenceQa.a.d OpenBookQa.da.a.ets,showing the effectiveness of ***,we conduct further a.la.ion experiments a.d expla.n the rea.oning beha.ior through the ca.e study.

关键词： question a.swering knowledge gra.h gra.h neura. network meta.pa.h rea.oning

Resea.ch on Credit Defa.lt Swa.s Pricing Considering Mora. ha.a.d Incentive under Reduce-Form Model

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Journa. of Systems Science a.d Systems Engineering 2024年第3期33卷 311-329页

作者： Lia.g Wu Ka.gjie he Zhe Guo School of Ma.hema.ica. Science Henan Institute of Science and TechnologyXinxiang453003China Public Front Office Depa.tment Industrial and Commercial Bank of ChinaZhengzhou450000China

Equilibrium pricing of credit defa.lt swa.s(CDS)promotes efficient identifica.ion of credit risk in the ma.ket,which in turn lea.s to efficient a.loca.ion of ***,even when CDS ha.e been priced in equilibrium,i.e.,when premiums a.e equa. to a.ticipa.ed pa.ments,the mora. ha.a.d incentives of CDS buyers increa.e with CDS ***,it becomes a. interesting resea.ch direction to study the impa.t of mora. ha.a.d incentives on the tra.ing mecha.ism or pricing of deriva.ives(CDS).Most of the existing litera.ure on the impa.t of mora. ha.a.d incentives in CDS pricing on deriva.ives tra.ing mecha.isms ta.es a.ma.ro perspective a.d focuses on the a.reement risk *** litera.ure exploring the a.a.ysis of the impa.t of mora. ha.a.d on the proba.ility of a.reement defa.lt from a.micro perspective is not yet *** this in mind,this pa.er focuses on the mecha.isms by which“fra.d”,a. extreme ma.ifesta.ion of micro-mora. ha.a.d incentives,a.fects the proba.ility of *** pa.er introduces for the first time the concept of“cla.ming fra.d”by credit protection buyers,which is different from the ma.ro perspective of mora. ha.a.d incentives,a.d thus defines a.specific extreme form of mora. ha.a.d ***,to a.dress the intrinsic fea.ure of the la.k of economic expla.a.ory power of the reduce-form model,this pa.er introduces a.mora. ha.a.d incentive fa.tor into the reduce-form model,a.d proposes a.mora. ha.a.d sta.e va.ia.le a. a.function of the a.set va.ue of the reference entity,which gives the reduce-form model strong economic expla.a.ory power,a.d the defa.lt predicta.ility is reduced by the description of the reduce-form *** terms of the object of study,this pa.er considers the issue of mora. ha.a.d incentives in the presence of cla.ming fra.d in two reference entities to further explore the impa.t of mora. ha.a.d incentives on defa.lt protection a. the micro level in terms of cyclic ***,ba.ed on the

关键词： Fina.cia. engineering mora. ha.a.d incentive cla.ming fra.d reduce-form model proba.ility of defa.lt ca.cula.ion CDS pricing

Review on Security Defense Technology Resea.ch in Edge Computing Environment

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Chinese Journa. of Electronics 2024年第1期33卷 1-18页

作者： Ke Sha.G Weizhen he Shua. Zha.G Na.iona. Digita. Switching System Engineering a.d Technologica. R&D Center

Edge computing, which a.hieves quick da.a.processing by sinking da.a.computing a.d stora.e to the network edge, ha. grown ra.idly a.ong with the Internet of things. The new network a.chitecture of edge computing brings new security cha.lenges. Ba.ed on this, this pa.er investiga.es the edge computing security litera.ure published in recent yea.s a.d summa.izes a.d a.a.yzes resea.ch work on edge computing security from different a.ta.k surfa.es. We sta.t with the definition a.d a.chitecture of edge computing. From the a.ta.k surfa.e between device a.d edge server, a. well a. on edge servers, the resea.ch describes the security threa.s a.d defense methods of edge computing. In a.dition, the ca.se of the a.ta.k a.d the pros a.d cons of defense methods is introduced. The cha.lenges a.d future resea.ch directions of edge computing a.e given.

关键词： Cloud computing Systems a.chitecture Computer a.chitecture Network a.chitecture Da.a.processing Security Servers

Study of primordia. deuterium a.unda.ce in Big Ba.g nucleosynthesis

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Nuclea. Science a.d Techniques 2024年第3期35卷 208-215页

作者： Zhi-Lin Shen Jia.-Jun he Key La.ora.ory of Bea. Technology of Ministry of Educa.ion College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Institute of Ra.ia.ion Technology Beijing Academy of Science and TechnologyBeijing 100875China

Big Ba.g nucleosynthesis(BBN)theory predicts the primordia. a.unda.ces of the light elements^(2) H(referred to a. deuterium,or D for short),^(3)he,^(4)he,a.d^(7) Li produced in the ea.ly *** these,deuterium,the first nuclide produced by BBN,is a.key primordia. ma.eria. for subsequent *** da.e,the uncerta.nty in predicted deuterium a.unda.ce(D/H)rema.ns la.ger tha. the observa.iona. *** this study,the Monte Ca.lo simula.ion code PRIMa. wa. used to investiga.e the sensitivity of 11 importa.t BBN rea.tions to deuterium *** found tha. the rea.tion ra.e uncerta.nties of the four rea.tions d(d,n)^(3)he,d(d,p)t,d(p,γ)^(3)he,a.d p(n,γ)d ha. the la.gest influence on the ca.cula.ed D/H ***,the ca.cula.ed D/H uncerta.nty ca.not rea.h observa.iona. precision even with the recent LUNa.precise d(p,γ)^(3) he *** the nuclea. physics a.pect,there is still room to la.gely reduce the rea.tion-ra.e uncerta.nties;hence,further mea.urements of the importa.t rea.tions involved in BBN a.e still necessa.y.a.photodisintegra.ion experiment will be conducted a. the Sha.gha. La.er Electron Ga.ma.Source Fa.ility to precisely study the deuterium production rea.tion of p(n,γ)d.

关键词： Big Ba.g nucleosynthesis a.unda.ce of deuterium Rea.tion cross section Rea.tion ra.e Monte Ca.lo method

Study on a.semi-resolved CFD-DEM method for rod-like pa.ticles in a.ga.-solid fluidized bed

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Pa.ticuology 2024年第4期87卷 20-36页

作者： Liping he Zhengxia. Liu Yongzhi Zha. Depa.tment of Mecha.ics School of Mechanical EngineeringTianjin UniversityTianjin300350China Insttute of Process quipment College of Energy EngineeringZhejiang UniversityHangzhou30027China

Ba.ed on a.semi-resolved CFD-DEM coupling method,this study proposed a.method tha. uses the minimum dista.ce between the fluid grid a.d the pa.ticle bounda.y a. a.reference va.ue to determine the degree of influence of the ta.get fluid grid on the pa.ticle's dra. force.a.fluidized bed of rod-like pa.ticles wa. chosen a. a.typica. ca.e to investiga.e the effect of different fluid grid sca.es on va.ious fluidized bed cha.a.teristic *** ca.cula.ion performa.ce of the semi-resolved a.d unre-solved CFD-DEM coupling a.gorithm on key fluidized bed cha.a.teristic pa.a.eters such a. a.era.e pressure drop,pa.ticle frequency distribution with bed height,a.d pa.ticle orienta.ion distribution were *** wa. found tha. the semi-resolved CFD-DEM coupling a.gorithm gra.ua.ly obta.ned results with higher consistency with decrea.ing fluid grid sca.e for key pa.a.eters such a. pa.ticle frequency distribution with bed height,pa.ticle orienta.ion distribution,a.d time-history mixing index,exhibiting a.phenomenon simila. to grid independence in fluid *** compa.ing with experimenta. results,it wa. verified tha. the semi-resolved CFD-DEM coupling a.gorithm ca. be a.plied to simula.e multi-gra.ula. ga.-solid systems with fluid grid sca.es equiva.ent to pa.ticle *** a.gorithm solves the limita.ion of fluid grid sca.e in the unresolved CFD-DEM coupling fra.ework a.d improves the grid a.a.ta.ility of the CFD-DEM coupling simula.ion a.gorithm.

关键词： CFD-DEM Semi-resolved method Fluid-solid flow Non-spherica. pa.ticle Fluidized bed

a.pipeline to cha.a.terize p53 effectors by integra.ive cistrome a.d tra.scriptome a.a.ysis in a.genetica.ly-defined orga.oid model

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Genes & Disea.es 2024年第2期11卷 512-515页

作者： June-ha.Shin Hwa.Ryeon Kim Ja.-Seok Roe Depa.tment of Biochemistry College of Life Science and BiotechnologyYonsei UniversitySeoul 120-749Republic of Korea

Tumor-protein 53(p53)is a.tra.scription fa.tor(TF)encoded by TP53(Trp53 in mice)a.d is a.ma.ter regula.or of tumor-suppressive progra.s'.Importa.tly,TP53 is the most frequently muta.ed gene in huma. ca.cer,a.d its loss of function contributes to tumor development,exemplified by va.ia.le p53 muta.ions detected in 50%-75%of pa.crea.ic ca.cers.2 From these perceptions,a.number of ta.gets tra.scribed by p53 tha. confer tumor suppression ha.e been ***,our understa.ding of how p53 prevents norma. cells from initia.ing tumorigenesis is still *** complement this limita.ion,herein,we esta.lished a.new a.proa.h to identify underlying effectors tra.scribed by p53 in norma. physiology.

关键词： incomplete initia.ing herein

The Minimum Centroid Bra.ch Spa.ning Tree Problem

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Journa. of the Opera.ions Resea.ch Society of China 2024年第2期12卷 528-539页

作者： ha. Lin Cheng he School of Science Henan University of TechnologyZhengzhou450001HenanChina

For a.spa.ning tree T of gra.h G,the centroid of T is a.vertex v for which the la.gest component of T-v ha. a. few vertices a. *** number of vertices of this component is ca.led the centroid bra.ch weight of *** minimum centroid bra.ch spa.ning tree problem is to find a.spa.ning tree T of G such tha. the centroid bra.ch weight is *** a.plica.ion to design of communica.ion networks,the loa.s of a.l bra.ches lea.ing from the switch center should be a. ba.a.ced a. *** this pa.er,we prove tha. the problem is strongly NP-ha.d even for bipa.tite ***,the problem is shown to be polynomia.ly solva.le for split gra.hs,a.d exa.t formula. for specia. gra.h fa.ilis,sa. Kn_(1),n_(2),...,n_(k)a.d P_(m)×P_(n),a.e presented.

关键词： Spa.ning tree optimiza.ion Centroid bra.ch-NP-ha.dness Polynomia.-time a.gorithm