Using attributed graph transformation productions defined on wscg model , the consistency between wscg execution instance and wscg model is guaranteed with a sound formal semantic basis Wscg模型的執(zhí)行語義有兩種描述方式,一種是定義在wscg元模型之上的基本的執(zhí)行語義,這是wscg模型進(jìn)行解釋執(zhí)行的基礎(chǔ)。
A similarity measure combining multiple features and layout is also presented . two attributed graph match methods based on local searching and genetic algorithm are proposed to meet the occasions of different applications . ( 3 ) a static image retrieval testing system is designed and implemented ( 3 )設(shè)計(jì)并實(shí)現(xiàn)了靜態(tài)圖像檢索實(shí)驗(yàn)原型系統(tǒng),包括:提出了圖像內(nèi)容的分層描述模型;設(shè)計(jì)實(shí)現(xiàn)了基于自組織神經(jīng)網(wǎng)絡(luò)聚類技術(shù)的樹狀多特征索引結(jié)構(gòu);提出了一種新的相關(guān)反饋模型。
Secondly , based on attributed graph grammar theory , we present a meta - model named wscg grammar for wscg model . elements , elements " attributes and elements " relationships of wscg model are all defined in wscg grammar . directed by wscg grammar , a wscg model can be developed , which can satisfy the specification of wscg model and eliminate some structure errors 其次,基于屬性圖文法,本文給出了由wscg文法描述的web服務(wù)復(fù)合元模型,對(duì)wscg模型的設(shè)計(jì)過程進(jìn)行約束,形成一種以屬性圖文法導(dǎo)向的wscg模型設(shè)計(jì)方式;不但保證了用戶可以生成符合規(guī)范的wscg模型,而且消除了wscg模型在結(jié)構(gòu)上可能引發(fā)死鎖的部分原因。
Firstly , wscg ( web service composition graph ) model , a model for web service composition , is proposed , which consists of visual presentation model and executable model . according to this model , the interactions and execution sequences among web services are characterized by wscg nodes and edges and their attributes . based on attributed graph theory , we give the formal definition of wscg model 本文首先提出了一個(gè)基于屬性圖理論的web服務(wù)復(fù)合模型? ? wscg模型,改進(jìn)了現(xiàn)有web服務(wù)復(fù)合模型在可視化表示能力和執(zhí)行語義的確定性等方面的不足;模型包括web服務(wù)復(fù)合的可視化表示模型和執(zhí)行模型兩個(gè)方面。