-easuring the %ffect of #entroid 3ize on 7eb 3earch 0recision and 2ecall
نویسندگان
چکیده
We present a controlled experiment that measures the effect, on retrieval effectiveness and efficiency, of varying the maximum keyword number used to represent documents in Web search engines. We defined a general methodology to quantitatively evaluate the impact of a given design option on the retrieval effectiveness-efficiency trad-offs, and apply to this particular case of centroid size. The resulting data suggests that in the general case, the most appropriate centroid size is 100
منابع مشابه
6isualization of 777 3earch 2esults
!BSTRACT 4HE IDEA OF )NFORMATION 6ISUALIZATION IS TO GET INSIGHTS INTO GREAT AMOUNTS OF ABSTRACT DATA %SPECIALLY DOCUMENT SETS FOUND BY SEARCHING THE 7ORLD 7IDE 7EB ARE A SPE CIAL CHALLENGE 4HE PAPER GIVES A SHORT OVERVIEW ON THE VARIETY OF POSSIBLE VISUALIZATIONS FOR THIS APPLICATION AREA 4HE PRESENTED IDEAS ARE GROUPED BY USING THE FOUR PHASE FRAMEWORK OF INFORMATION SEEKING #RUCIAL FACTORS F...
متن کاملCentroid Trees with Application to String Processing
Abstra t. A entroid of a tree T is a node v whi h minimizes over all nodes the largest onne ted omponent of T indu ed by removing v from T . A entroid tree U of another tree T is de ned on the same set of nodes of T : the root v of U is a entroid of T and the subtrees of v (in U) are the entroid trees of the onne ted omponents of T v. We des ribe some interesting properties of the entroid and o...
متن کاملffect of Chlorhexidine on Prevention of Local Infection in Temporary Transvenous Pacemaker Catheter Site
Background and Objectives: The local infection of temporary transvenous pacemaker catheter site is a common hospital acquired infections. This study aimed to assess the effect of the Chlorhexidine Glaciate 2% on prevention of local infection on temporary transvenous pacemaker catheter site. Materials and Methods: In this 7-month randomized controlled trial, 100 patients having temporary transve...
متن کاملCentroid Trees with Appli ation to String Pro essing
Abstra t. A entroid of a tree T is a node v whi h minimizes over all nodes the largest onne ted omponent of T indu ed by removing v from T . A entroid tree U of another tree T is de ned on the same set of nodes of T : the root v of U is a entroid of T and the subtrees of v (in U) are the entroid trees of the onne ted omponents of T v. We des ribe some interesting properties of the entroid and o...
متن کاملffect of Saffron Extract (Crocin) on Bax and Bcl2 and Oxidative Stress Levels in Testis Tissue of Streptozotocin-Induced Diabetic Rats
Aims: Type 1 diabetes is one of the most common endocrine diseases and causes oxidative stress in testis tissue. Today, in the treatment of diabetes, the tendency toward herbal medicines is increasing day by day. This study has been done with the aim of studying the crocin on Bax and Bcl2 and anti-oxidant levels of streptozotocin-induced diabetic rats. Method: In this experimental study, which...
متن کامل