联合分布密度 meaning in Chinese

density of simultaneous distribution

5 . the paper builds a new econometric model for estimating both the returns and durations , as well as gives the joint density of the marked point process of duration and transaction - by - transaction returns with an acd - arma framework
5 、在acd模型的基础上引入arma模型,来描述交易的时间间隔和交易期间的收益两个时间序列之间的相互关系,建立了acd - arma模型,给出了两个变量之间的联合分布密度函数以及估计方法。