The reflection travel time of P-P wave deviates from hyperbolic greatly, especially for relative long spreads, so the travel time can be approximated more exactly by three terms Taylor series than by two-term Taylor series.

The results show that,polymerization temperatures affect the thermodynamics behavior,composition and sequence length of AN/MA copolymers.

Linear decomposition time series analysis has become one of useful tools to investigate runoff characteristics, but how the sequence length affects the results of linear decomposition has not yet been studied in detail.

Simulation results show that this algorithm can stabilize the queue length to the target value and its drop probability is less than random early detection algorithm and PI .

Studies the discrete-time Internet congestion control algorithm based on queue length,thus adjusting the congestion rate in accordance to the queue length connecting the nodes in Internet so as to determine the date transmission rate of source nodes.

RAED(rate adaptive RED)algorithm is applied in indicating congestion levels and counting drop probability using the combined method of business flow rate and average queue length.