Reducing the quality fluctuation of PVC resin produced by calcium carbide method among each production batch;

Discussion on influence of coal quality fluctuation in coal-fired power plants;

Influence of load fluctuation on reaction system of LLDPE plant and its countermeasure;

Analyzing the reasons of the pure argon column undulation.

The fish is propelled by undulations of a long-based dorsal fin while the body axis is in many cases held straight in swimming.

And from the industry policy,the industry structure and the economic growth mode transformation,the reason and specialty of the undulation of the energy supply-demand and the energy consumption structure is analyzed.

Sand-dune Q absorption compensation based on 1-D elastic damping wave theory;

The wave characteristic and axial clearance between static state and dynamic state about the screw displacement pump;

Analysis of continuous spectrum wave packet in rotational-stratification two-dimension ocean;

It is shown that the viscous-spring artificial boundary adopted this method has high precision,and the method can be used in analysis of wave motion problem easily.

Three-dimensional visco-elastic artificial boundaries in time domain are developed by means of theory of elastic wave motion in this paper.

It is shown that the effects of the distortion of finite elements on wave motion are significant , great distortions of the element shapes will cause a complete distortion in the simulation of wave motion, the velocity of wave propagation in lumped-mass finite element discrete models is not always less than that in contin.

Comparison of the Price Volatility between Sino-US Soybean Futures;

RMB s Volatility:Measurement and International Comparison;

Long-term Memory in Stock Returns and Volatility: A Multi-national Evidence from V/S Statistic;