It can provide reliable basic parameters for roadway supporting design and have excellent extension and application foreground.

According to the critical value to predict the danger index of the coal and gas outburst stipulated in "the detailed regulations to prevent and control coal and gas outburst" and in combined with the basic parameters of the seam gas,the paper analyzed and pointed out the only gas outburst in No.

The experimental research and analysis on one of the grinding basic parameters"equivalent chip thickness" which is introduced by CIRP,are reported.

In allusion to variation of methanol project scheme,the basic data of methanol production were re-determined and checked,calculation method concerning methanol production was discussed,the energy consume and cost for new/old schemes were contrasted and summarized.

The paper analyzed the present situation and the problems existed in the construction of informationization in China s manufacturing industries,pointed out that the poor quality of the basic data became the bottleneck of the construction of informationization in the manufacturing industries.

Based on various investigation and wide research on the current status of city geospatial fundamental data (CGFD),this paper gives the principle to set up the CGFD application mode,describes basic contents of CGFD and introduces the classification of users.

design and implementation of data management system, owning to the aim of fundamental data management.

As the refreshing scheme depends heavily on the base data change frequency, researchers have presented many corresponding algorithms and frequency estimators for it.