一、報告主題：Motif-based?bipartite?graph?learning:?a?topological?perspective

二、報告人：喻堅

三、報告時間：2025年10月27日?9:00-15:00

四、報告地點：計算機大樓A505

五、報告摘要：In?this?talk,?we?first?examine?the?graph?as?a?discrete?structure?from?an?algebraic?topology?perspective?and?put?graphs?into?the?context?of?simplicial?complexes?and?chain?complexes.?We?then?connect?the?matrices?used?to?encode?graphs,?including?incidence?matrix,?adjacency?matrix,?and?graph?Laplacian?matrix,?to?concepts?of?gradient,?divergence,?and?the?boundary?and?co-boundary?operators?in?chain?complexes.?Based?on?that,?we?examine?the?function?of?the?popular?GCN?(Graph?Convolutional?neural?network)?layer?and?relate?it?to?the?heat?diffusion?differential?equation.?finally,?we?introduce?our?recent?works?on?graph?motifs?based?bipartite?graph?link?prediction?and?its?application?in?recommender?systems.

六、報告人簡介：

Dr?Jian?Yu?(喻堅)?is?an?Associate?Professor?in?the?Department?of?Computer?Science,?Auckland?University?of?Technology.?He?is?currently?the?director?of?the?Ubiquitous?and?Web?Computing?Research?Lab?(Ubiweb)?in?the?Department?of?Computer?Science?and?Software?Engineering,?ECMS.?His?current?research?interests?include?deep?learning?for?recommender?systems,?graph?neural?networks,?complex?networks,?Web?and?ubiquitous?computing,?and?service-oriented?computing.?He?has?served?as?PC?Member?for?over?100?international?conferences?including?CORE?Rank?A?conferences?ACM?CIKM,?ICSOC,?IEEE?SCC,?EAI?MobiQuitous,?COOPIS,?and?IEEE?TrustCom.?Dr?Yu?has?over?140?publications?and?has?published?in?top?journals?such?as?ACM?Computing?Surveys?(IF?14.32),?IEEE?Trans.?Services?Computing?(IF?11.019),?IEEE?Trans.?Intelligent?Transport?Systems?(IF?9.551),?IEEE?Internet?of?Things?Journal?(IF?10.238),?Elsevier?Future?Generation?Computer?Systems?(IF?7.307),?Knowledge-Based?Systems?(IF?8.139)?and?Expert?Systems?with?Applications?(IF?8.665).??He?is?Associate?Editor?for?Springer?Journal?of?Reliable?and?Intelligent?Environments?and?has?organized?several?special?issues?for?journals?including?Oxford?The?Computer?Journal,?Elsevier?JCSS,?and?Springer?Computing,?and?has?organized?over?ten?international?conferences?and?workshops.