In the course of the expansive transformation of the ethylene plant of Guangzhou General Petrochemical Works,the divisional cracking technology of ethane and naphtha is used to transform the cracking furance,and the transformation rate of ethane has been improved greatly,the circulation of ethane in the system has been reduced effectively.

Studying on domain decomposition using mortar elements and its applications;

The focus of domain decomposition parallel computation is on communication of information in sub domains of parallel course.

Parallel computation is based on the domain decomposition method and load balance is achieved by using METIS system.

The principle, advantages, disadvantages and application area of six main solutions such as half-rate technology, carrier-pool, cell merge, cell split, cell load sharing and carrier adjust are introduced one by one.

With the development of national economy, there are more and more deep underground rock mass engineering, the buried depth is more and more deep, an alternation of fracturing area and intact area phenomenon so-called zonal disintegration was monitored in a lot of engineering site.

According to the test resultst,he diagrams of zonal disintegration distribution of surrounding rock of the roadway are drawn.

The phenomena and laws of zonal fracturing are briefly introduced.