产品设计中的工程语义文本解析及检索技术研究

华中科技大学硕士学位论文产品设计中的工程语义文本解析及检索技术研究姓名：龚小寒申请学位级别：硕士专业：机械设计及理论指导教师：朱林;罗年猛2011-01-15ICADIIAbstractEngineeringsemanticstextisaspecialtextusedtodescribethestructuralpropertiesshapepropertiesprocessingpropertiesandsomeadditionalattributesofcomponents.Itoccupytheequalimportancewithengineeringgraphicengineeringdrawingandthree-dimensionalmodelinprocessofproductdesignwhatisaessentialcomponentfordesignertoexpresshisideaandIntent.Conventionalengineeringsemanticstextincludingdimensions,wealthinformationofcomponentsanddesignerincludedintitlebarandcolumn,engineeringrequirements,assemblyrequirements,drawingscaleandsoon.Inconsiderationoftheimportanceofengineeringsemanticstextinengineerdesignprocess,engineeringsemanticstextisdeeplydiscussedandresearchedinthispaper.Firstofall,thecurrentsituationinhomeandaboardforresearchonengineeringsemanticstextisstudiedcompletely;theinternaldatastructureofengineeringsemanticstextisanalysisdeeply;aorderlinessforexpressingspecialattributesofengineeringsemanticstextissummarized,it’saboutthatallofthespecialattributesofengineeringsemanticstextareexpressedbycontrolcharacterswhichiscomposedofspecialcharacters.Onthebasisofthisorderliness,severalalgorithmforengineeringsemanticstextareproposed,includingsplitalgorithmforcontrolcharactersrepresentthespecialattribute,displayalgorithm,aseriesofgeometrictransformationalgorithmsuchascopy,move,rotate,mirrorandsoon.Secondly,theresearchoncontrolcharactersofspecialattributelaysagoodfoundationforretrievalofengineeringsemanticstext.Onaccountoftheextraordinarynatureofengineeringsemanticstext,thatisitnotonlyshowofftextfeatureofplaintextobject,butalsoexhibitgraphicfeatureswhichissimilartographicobject.Comparewithtextsimilarityalgorithmandretrievalalgorithmontwo-dimensionalgraphicorthree-dimensionalmodelcomprehensively,aspecialretrievalalgorithmbasedonengineeringsemanticstextisproposed.Thisalgorithmmakestextretrieval,approximatematchingofdrawing,comparisonofdrawingbasedonengineeringsemanticstextpossible.Onthetheoryofdataintegrationmanagement,thealgorithmmakesthesearchthroughthecontentofengineeringdrawing,drawingcomparisonandstatisticalanalysismoreconvenientandfaster.Keywords:CAD,EngineeringSemanticsText,TextSimilarity,RetrievalTechnology“v”11.1CADComputerAidedDesign[1]CADCADCADCAD[2]CAD[3]40%~60%[4]CADWord1.2CADAutoCADWordAutoCADMTextAutoCADCADAutoCADCAD[5]CADCADAutoCADMTextMTextCADCADWillett[6]Salton[7]Callan[8][9]WordNetAgirre[9][10][11][12][13]70(Content-basedimageretrieval)(Semantic-basedimageretrieval)(Textire)[14](Color)(Shape)[15][16,17,18]W.YMA[14]XingQing[19]DengshengZhang[15][20]G.Sheikholesami—SemQuery[21]Fung[22]Vailaya[23]Iqbal(perceptualgrouping)BayesCIRES[24,25][24]1.3CADCADMicrosoftVisualStudioC++CAD1.42CADWord[26]CADCAD2.12.1.1²2-12-1{\Fgdt;u}{\Fgdt;c}{\Fgdt;e}{\Fgdt;g}{\Fgdt;k}{\Fgdt;d}{\Fgdt;f}{\Fgdt;b}{\Fgdt;a}{\Fgdt;j}{\Fgdt;r}{\Fgdt;i}{\Fgdt;h}{\Fgdt;t}²2-22-2Ra3.2mj{\Ra;3.2\}Ra3.2mj{\RaQ;3.2\}Ra3.2mj{\RaO;3.2\}RamaxRa3.2mjminRa1.6mj{\RaQ;maxRa3.2,minRa1.6\}RymaxRy3.2mj{\Ra;maxRy3.2\}maxRz200mj{\RaO;maxRz3.2\}RzmaxRz3.2mjminRz1.6mj{\RaQ;maxRz3.2,minRz1.6\}Rz3.2mjRy12.5mj{\RaQ;maxRz3.2,minRy1.6\}²{\TR;}2.1.2{BlockBegin}BlockEnd\LUnderLineOn\lUnderLineOff\L…\l\OOverLineOn\oOverLineOff\O…\o\T0.75~4\W1.020.5\C1255AutoCAD(ACI)\H\Hvaluevalue\Hvalue×value\Q90-85852.1.3UnicodeUnicodeUnicodef°±%%c%%p%%dUnicode2-32-3UnicodeUnicode≈\U+2248∠\U+2220?\U+0394Φ\U+0278==\U+2261≠\U+2260Ω\U+2126O\U+03A922\U+20822\U+00B23\U+00B32.1.4CADSHXTrueTypeSHXAutoCADTrueType[16]TrueTypeTrueTypeSHX\fTrueType\FSHX|bTrueType|b1010|iTrueType|i1010|c|c|p|p2.1.52-12-1a%%C125\H0.7x;\SH7/js6\SH7/js6b%%C125\H0.7x;\SH7#js6;\SH7#js6c%%C273.52\H0.7x;\S^-0.081;\S^-0.081d%%C273.52\H0.7x;\S+0.030^;\S+0.030^2-3a2-3b2-2c\A\A0122-22.1.6²tvaluetvaluenln=value/l2.5t1042-32-3ttctDtr²in(FirstLine)nlvalue=n*h102.5\pxi4;contentsivalueFirstLinex(Hanging)ylvaluevalue=(x-y)/lvaluernRight2-4102.52.52.5i3,l1,r1;4112-4²5qlqcqrqjqd²bvalueavalueb4a244222.542.5×=102x2.5=5²1.66x1x2x0.0833(0.25x)1.3333(4x)AtleastExactlyMultiplysasesmxsavaluex*valuevalue2.2CADCAD2-5—1.2.3.1.2._GB231252-5{\fKaiTi_GB2312|b0|i0|c134|p49;\P1.\P2.\P3.}2-52-61.2.3.4.2-62.3Unicode33.13.1.12001[26][27]12(,,...,)nDDDD=m12,,...,mTTT12(,,...,)TjjjmjDddd=12(,,...,)TmQqqq=ijdijiqimJaccardDice1.JaccardJaccard122111(,)mkikjkijmmmkikjkikjkkkddSimDDdddd=====+-∑∑∑∑Jaccard(,)ijijijijDDCSimDDABCDDDD∩==+-+-∩(3.1)2.12(,,...,)TiiimiDddd=12(,,...,)TjjjmjDddd=iDjD1(,)mijkikjkSimDDdd==∑(3.2)dij=1ijdij=0ij(,)ijijSimDDDD=∩(3.3)ijDD∩iDjD3.12211(,)mkikjkijmmkikjkkddSimDDdd====∑∑∑()12(,)ijijijDDCSimDDABDD∩==++(3.4)4.DiceDice122112(,)mkikjkijmmkikjkkddSimDDdd====+∑∑∑Dice22(,)ijijijDDCSimDDABDD∩==++ijCDD=∩iAD=jBD=(3.5)CAB3.1.2[28][29][,,(,)]iFDQSimCqD(3.6)(,)iSimCqDDQ[,,(,)]iFDQSimCqDiD(iDD∈)g(gQ∈)01qQ∈,0qjw≥(,)jqtj=0,1,...,N-1q,0q,1q,N-1q=(w,w,...,w)tfdfjtjftq,jtjQtfi,jtjDiQidfjtjlog(/)jjidfddf=tf×idftjDidi,j=tfi,j×idfjtjqwq,i=tfq,i×idfjqiD1,,0(,)MiqiijiSimCqDwd-==*∑01234(,,,,)DDDDDD=Q0D=chinachinauniversityuniversity1D=chinainformationchinauniversityinformat