【摘 要】
:
Ranking is a main research issue in IR-styled keyword search over a set of documents.In this paper,we study a new keyword search problem,called context-sensitiv
【机 构】
:
Department of Systems Engineering and Engineering Management
【基金项目】
:
the Research Grants Council of the Hong Kong SAR,China
论文部分内容阅读
Ranking is a main research issue in IR-styled keyword search over a set of documents.In this paper,we study a new keyword search problem,called context-sensitive document ranking,which is to rank documents with an additional context that provides additional information about the application domain where the documents are to be searched and ranked.The work is motivated by the fact that additional information associated with the documents can possibly assist users to find more relevant documents when they are unable to find the needed documents from the documents alone.In this paper,a context is a multi-attribute graph,which can represent any information maintained in a relational database,where multi-attribute nodes represent tuples,and edges represent primary key and foreign key references among nodes.The context-sensitive ranking is related to several research issues,how to score documents,how to evaluate the combining the scores/costs from the documents and the context.More importantly,the relationships between documents and the information stored in a relational database may be uncertain,because they are from difierent data sources and the relationships are determined systematically using similarity match which causes uncertainty.In this paper,we concentrate ourselves on these research issues.and provide our solution on how to rank the documents in a context where there exist uncertainty between the documents and the context.We confirm the effectiveness of our approaches by conducting extensive experimental studies using real datasets.We present our findings in this paper.
其他文献
Background Iron deficiency (ID) is still a great challenge to health care worldwide. Results of randomized controlled trials (RCTs) evaluating the effect of Hel
Background Alzheimer's disease (AD) is a neurodegenerative disorder and the leading cause of dementia in the elderly. The two hallmark lesions in AD brain are d
So far, standard therapy of complex thoracoabdominal aortic disease is open surgical repair requiring aortic clamping and replacement of the involved segment.De
Background The accuracy of microelectrode-guided localization can make the operation safe and effective, but only experienced neurosurgeons are capable of perfo
The non-isothermal crystallization of poly(L-lactide) (PLLA) under quiescent and steady shear flow conditions was in situ investigated by using polarizing optic
Background Genome-wide association studies for type 2 diabetes mellitus (T2DM) identified FTO gene as a locus conferring increased risk for common obesity in ma
Background Ursolic acid (UA) is a ubiquitous molecule in the plant kingdom with specific anticancer effects that have been shown in vitro and in vivo. Although
AIM: To investigate the effectiveness of early infliximab use for induction and maintenance therapy in pediatric Crohn’s disease. METHODS: We performed a retro
针对模幂型公钥密码的快速实现问题提出了一种新的多机协同实现机制,结合RSA详细论述了多机协同机制的设计思想和实现方法,并针对新机制设计了一种多机模幂算法,分别从工作机
Poly(vinylidene fluoride)(PVDF)/multi-walled carbon nanotube(MWCNT) nanocomposites were pre-pared by means of ultrasonic dispersion method. X-ray diffraction(XR