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The diffusion model of the innovations in the market has been combined with the average revenue per user model of the innovative products, and the revenue model for the different vendors has been submitted afterwards. Based on the models, the empirical study has been done for China Mobile, China Unicom, China Telecom and China Netcom using the date from 2002 to 2007, including the growing numbers...
To overcome the deficiency of traditional traffic accident estimation models, this paper introduced a new way. It gave two categories on traffic accident affected factors and selected the main ones, using stepwise regression model. ARIMAX model, a dynamic regression one, was used to forecast traffic accident volumes. The former job ensures the precision of estimation, while the latter one owns both...
This paper developed a hypothesis to overcome the disadvantage of the binary logit model used in resident trip generation. It proposed that random parameters beta' obeyed some distribution firstly. Combined the characters of trip generation and observable variables, it then put forward that beta' followed log normal distribution. The hypothesis was validated by demarcating the parameters in SAS software...
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