To quench 20 steel in critical zone under different intensity alternation magnetic field and to observe the microstructure after phase transformation.

A theoretical modelling of tensile strength of powder bonded nonwovens is deduced according to the concept of critical zone.

This paper applies "flux increase by degrees method" to measure critical flux and obtain three hydrodynamic operating section of MBR: exceed critical section,critical section and hypo-critical section;Under the condition of MLSS was 6000mg/L and aeration intensity was 0.

The C++Builder is cited as an instance to illustrate the thread establishment, realizing method of process control and that of multithread synchronization, which includes applications of the critical section, mutex signal and affair.

This paper introduces the method of how to use TThread which is one of multithreading object classes and how to use Critical Section and Mutexes which are synchronized control object classes provided in Delphi 3.

A special area with certain thickness located between matrices and fibers is defined as ‘interfacial zone’ in this paper, which consists of a bulk phase (often called as interphase) and two interfaces, that is, the interphase/matrix interface and the interphase/fibre interface.

In this study, the effect of synthetic C-S-H gel hydrothermally produced with a kind of siliceous material and calcia material as raw materials on the interfacial zone between hardened cement paste and aggregate in concrete was investigated.

Cement paste and interfacial zone between aggregate and mortar for concrete were investigated through the method of SEM.