论言语行为的结构及言语表达--兼谈汉语口语训练

言语行为(说话)是包括言语心理、言语思维与言语技术在内的一个非常精密而复杂的活动过程,实际生活中的每一个正常的言语行为都必不可少地要涉及到言语心理、言语思维、言语技术诸方面活动的介入.论文旨在阐释言语心理、言语思维与言语技术两个环节的基本内涵及其相互支撑的结构关系.     

Bayesian analysis of linear models exhibiting changes in mean and precisionat an unknown time point

This paper analyses a linear model in which both the mean and the precision change exactly once at an unknown point in time. Posterior distributions are found for the unknown time point at which the changes occurred and for the ratio of the precisions. The Bayesian predictive distribution of k future observations is also derived. It is shown that the unconditional posterior distribution of the ratio of precisions is a mixture of F-type distributions and the predictive distribution is a mixture of multivariate t distributions.