global description
2.In this paper, a formal description for VAX-11 object language with BNF form and STRUCT model is presented, and the storage method of the global symbol table in image file is discussed. The description and the analysed results can play a directive role in the analysis of the data struetures in image files.
3.Based on the description of the global structure of this system and combined with the J2EE platform the key techniques are discussed in detail and the establishment of the dangerous chemical sources database is explained.
4.Description of remote sensing (RS), global position system (GPS) and geographic information system (GIS) and their relations with development of environmental science and technology, and their practical application to environmental science and technology were presented. The authors proposed to develop the technique of RS, GRS and GIS in one, to make the technique become multifunction which fit for applying to environmental science and the need of sustainable development.
5.The systematic and synthetic description and review of lianas, chiefly in tropic, are described and reviewed in this paper, in which some ecological questions of lianas are included distributed as follows: (1) The conception and significances of lianas; (2) Liana flora and its distribution in the world; (3) Its biological characteristics; (4) Its ecological characteristics; (5) Its abundance (density) and species-richness in tropical forest; (6) The ecological significance of lianas-aggregation in gap and the variance of its abundance in the process of forest succession; (7) The relationship between lianas and trees; (8) The positive and the negative contribution of lianas to tropical forest; (9) The types of climbing mechanism of lianas and its competitive predominance; (10) Global climate-variance (CO2 increase) promotes abundance of lianas to increase, and some ecological consequence are resulted from which.
