EXPERIMENT WITH A HIERARCHICAL TEXT CATEGORIZATION ...

Chapter 13 EXPERIMENT WITH A HIERARCHICAL TEXT CATEGORIZATION METHOD ON WIPO PATENT COLLECTIONS Domonkos Tikk, György Biró, and Jae Dong Yang

1.

INTRODUCTION
       

 

            
             
      
    
      
   
      
 
         
               



 

    
    
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Preprocession - removal of function words - stemming - dimensionality reduction - term indexing

To be improved

Classifier

Topic descriptors Raise weight of cooccurring terms in topic descriptors

Correct

Misclassified

Category not found

Lower the weight of cooccurring terms in topic descriptors

Performance check (Q-measure) Acceptable

Figure 1.

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288

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296

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70

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Experiment with HITEC on WIPO patent collections

299

obTTLMg IO MGcbSNc IQ | }r~xLS`FL `LNGQN KISSGKNPIQ fssMGaPLNPIQ IO TGNFIu QLTGc{ € ‚ € LƒaG LgGcd o„ … ‚ ob``IMN „GKNIM … LKFPQGd kx€€ ‚ k €GLMGcN €GPRFsIMcv WaLSbLNPIQ oGNNPQR }rw†KIQOh SGaGS T GLcbMG KSh† j hj KSh†i j h‡ chKSh†ij hj T hRh† j hj EI` P`NL ˆ‰hŠ‰j ‹ i h‹e ‰eh ‰ eˆh‡‹ P`NLK ˆ‰h‰ ‹ h‹e ‰ehyŒ eˆhŠ‡ T LPQ ˆ i h‡y ‡ŒheŠ Œ‹hŒy e i hi ‡ j j NtuO ˆŒh Œ ‡eh‰ˆ ‰ hŠˆ eehŠ‰ i h‡ˆ cGT LQNPK ˆˆhŒy Š ‰Œhˆe e‡he‡ sGcN IO ‰‰hjj ‚ Œyhjj ‚ | }r~ `L`GM € do„ … o„ … uPGMGQKG yyhŒy ‚ yehˆe i EI`e P`NL ‡‰h‰ˆ ‹ i h‹e Š‰hjjj‰ ‰‰hŒŒ P`NLK ‡‰hˆy ‹ h‹e Š‰h ‰‰h‰‡ T LPQ ‡ehˆy ‡ŒheŠ Š j h‡‹ Œ‡h‹‡ j NtuO Š hŠy ‡Œhyy ‰ˆh‰Š eŠhj ‰ cGT LQNPK ‡‹hŒy ŠˆhŒ‰ Š‹hŒ‡ ‰‹hˆŒ sGcN IO Š‹hjj ‚ ˆ i hjj ‚ k x€€ | }r~ `L`GM € uPGMGQKG y j hŒy ‚ yŠhŒ‡ fQg P`NL Šehˆ‡ ‹‰h‡e ˆ ii hŒ‰ ŒˆhŒˆ P`NLK ŠehŒyi ‹‰hˆŒ ˆ hi ‡ Œˆhe‡ T LPQ Šyhe ‹Œh‹Š ‰‡h‹Š Œyh‰y NtuO Š i hii ‹ j he‡ ˆ j hy‡ Œ ji hŠyj cGT LQNPK ŠˆhŒˆ ‹ehŒ‡ ˆˆheˆ ‰ h‹ sGcN IO ˆehjj ‚ Œ‡hjj ‚ | }r~ `L`GM € o„ … uPGMGQKG yehŒˆ ‚ y‡heˆ

Table 1.


    
     
    
    

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Acknowledgments
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302

Domonkos Tikk, György Biró, Jae Dong Yang

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