The effect of blockage and work lost caused by end wall boundary layer in axial flow compressors is discussed in this paper, and a new method for computing the blockage and the work lost coefficient suitable for engineering design and analysis of axial compressors is proposed.

Measuring the ultrasonic attenuation coefficient of flyash scale in the transport pipeline;

Experimental study on integrated attenuation coefficient of organic contaminant (COD_(Cr)) in upper reaches of Hanjiang River;

Experimental research on attenuation coefficient model of low-frequency wave in oil layer;

Based on the 2nd Lyapunov method,a notion of decay coefficient was introduced.

In this paper flight decay coefficient and ballistic limit of several type fragment in common use are computed and analyzed,and affection of fragment shape to velocity decay coefficient and ballistic limit is also analyzed.

The decay coefficient is introduced into showing dispersion of the copper bar.

The experimental results show that a) the attenuation coefficient of velocity is constant and the air drag coefficient is a linear function of initial velocity.

The experimental results show that:(1) for ideal spheres,the attenuation coefficient of velocity is constant,the air drag coefficient is slightly affected by the initial velocity and is a linear function of initial velocity,and(2) for real fragments formed by a warhead,the flight performances are different from ideal spheres,the air drag coefficient is affected by th.

Determination of creep reduction factor of geosynthetics by time-temperature superposition;

Creep reduction factor of geosynthetics;

The author introduces two calculation models of the manual hole digging pile wall protection,attempts to use the reduction factor methods considering the spatial effect,verifies the feasibility of the method combined with the concrete the numerical example,which provides the reference for the similar projects.