... evidence-oriented probabilistic model for ex-pert search and a method for the implementa-tion are proposed. Experimental results show that the proposed model and the implementa-tion are highly ... (Maconald and Ounis, 2006), query expansion (Macdonald and Ounis, 2007), hierarchical lan-guage model (Petkova and Croft, 2006), and for- mal model generation (Balog et al., 2006; Fang et al., ... sub-sections, we will detail two sub-models: the expert matching model P(c|e) and the evidence matching model P(e|q). 3.2 Expert Matching Model We expand the evidence e as quadruple <topic,...