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Ponte and Croft Experiments

  • Data

    • TREC topics 202-250 on TREC disks 2 and 3

      • Natural language queries consisting of one sentence each

    • TREC topics 51-100 on TREC disk 3 using the concept fields

      • Lists of good terms

Topic: Satellite Launch Contracts</p></LI></UL><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" ><desc _tmplitem="15" >Description:</p></LI></UL><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >… </desc></p></LI></UL><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" ><con _tmplitem="15" >Concept(s):</p></LI></UL><OL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >Contract, agreement</p><LI _tmplitem="15" ><p _tmplitem="15" >Launch vehicle, rocket, payload, satellite</p><LI _tmplitem="15" ><p _tmplitem="15" >Launch services, … </con></p></OL></div> </div> </div></div> <div _tmplitem="15" class="slide-metadata"> <hr _tmplitem="15" > <small _tmplitem="15" >Speaker Notes:</small> <div _tmplitem="15" class="slide-note" id="slide_note_tree-273-slide-4242-22"> <p _tmplitem="15" >« Click to add note »</p> </div> <small _tmplitem="15" >Created by <a _tmplitem="15" href="user/29">Tgbyrdmc</a>.</small> <br _tmplitem="15" / ><br _tmplitem="15" /> </div> </div> <div _tmplitem="15" class="slide " id="tree-273-slide-4243-23-view"> <!-- <span _tmplitem="15" onclick="filterLatex(this.id)" id="4243"> Click me! </span> --> <div _tmplitem="15" class="slide-content"><div _tmplitem="15" class="slide-scaler"> <div _tmplitem="15" class="slide-header"> <h2 _tmplitem="15" > <div _tmplitem="15" class="slide-title" id="slide_title_tree-273-slide-4243-23"> Precision/recall results 202-250 </div> </h2> </div> <div _tmplitem="15" class="slide-body" id="slide_body_tree-273-slide-4243-23" onclick="enableWYSISWYG(this)"> <div _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" ></p></LI></UL></div><div _tmplitem="15" ><img _tmplitem="15" src="http://fileservice.slidewiki.org/media/images/29/949.png?filter=Resize-width-350"/></div> </div> </div></div> <div _tmplitem="15" class="slide-metadata"> <hr _tmplitem="15" > <small _tmplitem="15" >Speaker Notes:</small> <div _tmplitem="15" class="slide-note" id="slide_note_tree-273-slide-4243-23"> <p _tmplitem="15" >« Click to add note »</p> </div> <small _tmplitem="15" >Created by <a _tmplitem="15" href="user/29">Tgbyrdmc</a>.</small> <br _tmplitem="15" / ><br _tmplitem="15" /> </div> </div> <div _tmplitem="15" class="slide " id="tree-273-slide-4244-24-view"> <!-- <span _tmplitem="15" onclick="filterLatex(this.id)" id="4244"> Click me! </span> --> <div _tmplitem="15" class="slide-content"><div _tmplitem="15" class="slide-scaler"> <div _tmplitem="15" class="slide-header"> <h2 _tmplitem="15" > <div _tmplitem="15" class="slide-title" id="slide_title_tree-273-slide-4244-24"> Precision/recall results 51-100 </div> </h2> </div> <div _tmplitem="15" class="slide-body" id="slide_body_tree-273-slide-4244-24" onclick="enableWYSISWYG(this)"> <div _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" ></p></LI></UL></div><div _tmplitem="15" ><img _tmplitem="15" src="http://fileservice.slidewiki.org/media/images/29/950.png?filter=Resize-width-344.0624671916"/></div> </div> </div></div> <div _tmplitem="15" class="slide-metadata"> <hr _tmplitem="15" > <small _tmplitem="15" >Speaker Notes:</small> <div _tmplitem="15" class="slide-note" id="slide_note_tree-273-slide-4244-24"> <p _tmplitem="15" >« Click to add note »</p> </div> <small _tmplitem="15" >Created by <a _tmplitem="15" href="user/29">Tgbyrdmc</a>.</small> <br _tmplitem="15" / ><br _tmplitem="15" /> </div> </div> <div _tmplitem="15" class="slide " id="tree-273-slide-4245-25-view"> <!-- <span _tmplitem="15" onclick="filterLatex(this.id)" id="4245"> Click me! </span> --> <div _tmplitem="15" class="slide-content"><div _tmplitem="15" class="slide-scaler"> <div _tmplitem="15" class="slide-header"> <h2 _tmplitem="15" > <div _tmplitem="15" class="slide-title" id="slide_title_tree-273-slide-4245-25"> The main difference is whether “Relevance” figures explicitly in the model or not </div> </h2> </div> <div _tmplitem="15" class="slide-body" id="slide_body_tree-273-slide-4245-25" onclick="enableWYSISWYG(this)"> <div _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" ></p></LI></UL><UL _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >LM approach attempts to do away with modeling relevance</p></LI></UL></UL><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >LM approach asssumes that documents and expressions of information problems are of the same type</p></LI></UL><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >Computationally tractable, intuitively appealing</p></LI></UL></div><div _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >LM vs. Prob. Model for IR</p></LI></UL></div> </div> </div></div> <div _tmplitem="15" class="slide-metadata"> <hr _tmplitem="15" > <small _tmplitem="15" >Speaker Notes:</small> <div _tmplitem="15" class="slide-note" id="slide_note_tree-273-slide-4245-25"> <p _tmplitem="15" >« Click to add note »</p> </div> <small _tmplitem="15" >Created by <a _tmplitem="15" href="user/29">Tgbyrdmc</a>.</small> <br _tmplitem="15" / ><br _tmplitem="15" /> </div> </div> <div _tmplitem="15" class="slide " id="tree-273-slide-4246-26-view"> <!-- <span _tmplitem="15" onclick="filterLatex(this.id)" id="4246"> Click me! </span> --> <div _tmplitem="15" class="slide-content"><div _tmplitem="15" class="slide-scaler"> <div _tmplitem="15" class="slide-header"> <h2 _tmplitem="15" > <div _tmplitem="15" class="slide-title" id="slide_title_tree-273-slide-4246-26"> Problems of basic LM approach </div> </h2> </div> <div _tmplitem="15" class="slide-body" id="slide_body_tree-273-slide-4246-26" onclick="enableWYSISWYG(this)"> <div _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" ></p></LI></UL><UL _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >Assumption of equivalence between document and information problem representation is unrealistic</p></LI></UL></UL><UL _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >Very simple models of language</p></LI></UL></UL><UL _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >Relevance feedback is difficult to integrate, as are user preferences, and other general issues of relevance</p></LI></UL></UL><UL _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >Can’t easily accommodate phrases, passages, Boolean operators</p></LI></UL></UL><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >Current extensions focus on putting relevance back into the model, etc.</p></LI></UL></div><div _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >LM vs. Prob. Model for IR</p></LI></UL></div> </div> </div></div> <div _tmplitem="15" class="slide-metadata"> <hr _tmplitem="15" > <small _tmplitem="15" >Speaker Notes:</small> <div _tmplitem="15" class="slide-note" id="slide_note_tree-273-slide-4246-26"> <p _tmplitem="15" >« Click to add note »</p> </div> <small _tmplitem="15" >Created by <a _tmplitem="15" href="user/29">Tgbyrdmc</a>.</small> <br _tmplitem="15" / ><br _tmplitem="15" /> </div> </div> <div _tmplitem="15" class="slide " id="tree-273-slide-4247-27-view"> <!-- <span _tmplitem="15" onclick="filterLatex(this.id)" id="4247"> Click me! </span> --> <div _tmplitem="15" class="slide-content"><div _tmplitem="15" class="slide-scaler"> <div _tmplitem="15" class="slide-header"> <h2 _tmplitem="15" > <div _tmplitem="15" class="slide-title" id="slide_title_tree-273-slide-4247-27"> Extension: 3-level model </div> </h2> </div> <div _tmplitem="15" class="slide-body" id="slide_body_tree-273-slide-4247-27" onclick="enableWYSISWYG(this)"> <div _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" ></p></LI></UL></div><div _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >3-level model</p></LI></UL><OL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >Whole collection model ( )</p><LI _tmplitem="15" ><p _tmplitem="15" >Specific-topic model; relevant-documents model ( )</p><LI _tmplitem="15" ><p _tmplitem="15" >Individual-document model ( )</p><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >Relevance hypothesis</p></LI></UL><UL _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >A request(query; topic) is generated from a specific-topic model { , }.</p></LI></UL></UL><UL _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >Iff a document is relevant to the topic, the same model will apply to the document.</p></LI></UL></UL><UL _tmplitem="15" ><UL _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >It will replace part of the individual-document model in explaining the document.</p></LI></UL></UL></UL><UL _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >The probability of relevance of a document</p></LI></UL></UL><UL _tmplitem="15" ><UL _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >The probability that this model explains part of the document</p></LI></UL></UL></UL><UL _tmplitem="15" ><UL _tmplitem="15" ><UL _tmplitem="15" ><LI _tmplitem="15" ><p _tmplitem="15" >The probability that the { , , } combination is better than the { , } combination</p></LI></UL></UL></UL></div><div _tmplitem="15" ><img _tmplitem="15" src="http://fileservice.slidewiki.org/media/images/29/951.wmf?filter=Resize-width-33.437532808399"/></div><div _tmplitem="15" ><img _tmplitem="15" src="http://fileservice.slidewiki.org/media/images/29/952.wmf?filter=Resize-width-31.875"/></div><div _tmplitem="15" ><img _tmplitem="15" src="http://fileservice.slidewiki.org/media/images/29/953.wmf?filter=Resize-width-31.875"/></div><div _tmplitem="15" ><img _tmplitem="15" src="http://fileservice.slidewiki.org/media/images/29/954.wmf?filter=Resize-width-33.437532808399"/></div><div _tmplitem="15" ><img _tmplitem="15" src="http://fileservice.slidewiki.org/media/images/29/955.wmf?filter=Resize-width-31.875"/></div><div _tmplitem="15" ><img _tmplitem="15" src="http://fileservice.slidewiki.org/media/images/29/956.wmf?filter=Resize-width-33.437532808399"/></div><div _tmplitem="15" ><img _tmplitem="15" src="http://fileservice.slidewiki.org/media/images/29/957.wmf?filter=Resize-width-31.875"/></div><div _tmplitem="15" ><img _tmplitem="15" src="http://fileservice.slidewiki.org/media/images/29/958.wmf?filter=Resize-width-31.875"/></div><div _tmplitem="15" ><img _tmplitem="15" src="http://fileservice.slidewiki.org/media/images/29/959.wmf?filter=Resize-width-33.437532808399"/></div><div _tmplitem="15" ><img _tmplitem="15" src="http://fileservice.slidewiki.org/media/images/29/960.wmf?filter=Resize-width-31.875"/></div> </div> </div></div> <div _tmplitem="15" class="slide-metadata"> <hr _tmplitem="15" > <small _tmplitem="15" >Speaker Notes:</small> <div _tmplitem="15" class="slide-note" id="slide_note_tree-273-slide-4247-27"> <p _tmplitem="15" >« Click to add note »</p> </div> <small _tmplitem="15" >Created by <a _tmplitem="15" href="user/29">Tgbyrdmc</a>.</small> <br _tmplitem="15" / ><br _tmplitem="15" /> </div> </div>


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