Coordinated Development of Logistics Development and Low-Carbon Environmental Economy Base on AHP-DEA Model

Table 1

System evolution equation method.

Method	Formula	Advantages and disadvantages
Multivariable synthesis method	where is the stable region of the system; effect of as variable on system order	The calculation is simple and easy to operate, and the reference index determination is inconsistent and the comparability is poor
Efficiency coefficient method	where and are evaluation functions; ; is coordination degree, is comprehensive evaluation index, and and are weights	It is simple and easy to introduce order parameters, and it is difficult to select reasonable indexes
Coefficient of variation method	where are coefficients; are subsystems	The model is simple, the principle is clear, and the selection of the two system indexes should be accurate and representative
Spatial description method	. Among them, are two subsystems; are the degrees of development of two subsystems; is the average level of the development of two subsystems; are the weights	Analyze the coordination degree from static and dynamic; to calculate the coordination degree of multisystem, the model is complex and the amount of calculation is large
System evolution equation	. Among them, and are two subsystems; and are the evolution rates of the two subsystems; is the coupling degree of the coupled system	Considering the dynamic changes of the system with time, the coordination degree of the system is divided into absolute coordination degree and relative coordination degree, which is complicated in operation and requires high continuity of indicators and data