... sequence until convergence. In both perceptron and CRF training, we average the parameters over training iterations (Collins, 2002). 4 Porting HMM/CFG Model to HCRFs In our first experiment, ... model training, which is seldom available in practical applications outside of large research labs. A generative HMM/CFG composite model, which integrates easy-to-obtain domain knowledge into ... in natural language processing and speech recognition, and best practices in language engineering for every new domain. In the past decade many statistical learning approaches have been proposed,...