Experience in the construction of mass-flow measurement and control system used in measurement and sensor technology experimental teaching has been summarized.

Reinforcement of the managenent of standard Chinese pronunciation test center to ensure the test quality;

A statistical review of the score characteristics from the test is followed by discussion of aspects like scorer reliability,indexes of difficulty and item discrimination,with a view to ensure the test quality.

Raster sensor and its application in the flow test;

The technology of no-flow-concentrating flow testing in water injection well is based on principle of interpolation of super sonic wave transfer which has a feature of being test without flow-concentration,without setting up the flow-concentration and of conducting test in many formations at once time and preventing the influence on test from temperature,viscosity,residue and turbulent flow.

According to the use of stabilized mixing plant of WBS-300 type for many years, the article presents that flow test is used to control the mix proportion of stabilized soil and then to further guarantee the mixing quality of mixture.

According to testing requirement,test traffic should be similar to practical network traffic.

This paper analyzes the problem of stochastic test traffic generating,concludes the generating expressions of stochastic test traffic.

This paper presents a generating technology of self-similar test traffic.

Differential pressure type vortex mass flowmeter is a new kind of device for mass flowrate measurement.

The basic mechanism and elements responding to measuring precession about many kinds of powder mass flow measurement technologie are presented.