The interdynamic relation of teacher constant and student varable exists in the Chinese teaching to the Korean.

Three types demand including emission line,transaction and investment of carbon emission right are expounded,and three endogenous variables including use value,use quantity and production technology and their influence on the firm demand of carbon emission right are analyzed.

In this paper,a production function with the endogenous variable as progress of science and technology is introduced,based on which an optimal control of inventory of science and technology is also obtained.

Based on the analysis of the factors of endogenous variable that affect the western industrialization of China, this paper attaches great importance to knowledge, technological progress and human resources so as to ensure long-term economic growth in western part of China.

Meanwhile four exogenous variables including benefit group influence power,substitute energy,transaction price,price expectation and carbon tax and their functional mechanism on the firm demand of carbon emission right are analyzed.

The authors forecast day-ahead electricity price by generalized autoregressive conditional heteroscedasticity(GARCH) model and as exogenous variable the daily price ratios of different weekday types are led into this GARCH mode to intensify the response of the proposed model to external influences.

So in this paper,one tried to apply those theories or methods of nonparametric and semi-parametric regression to nonlinear time series model with exogenous variables.

Due to this reason, population, environment and natura resources are changing into important internal variables from original external variables in economics analysis model.

The explanation is made through two variables: both the internal variable (pension system, family structure, and community structure) and the external variable (c.