Exploitation and Management of Diopside Resources in the Yanping District, Nanping City;

Application of 3S Technology in the Forest Resource Management in Yanping District;

Based on the data of fixed sample plots of continuous survey and typical sample plots and method of stem analysis, evaluation of site quality, stand structure, growth law, biomass, regeneration measure, and selection cutting about natural evergreen broad-leaved forest were studied in Yanping district of Nanping city, Fujian province.

The generators as commutators of transvections in the special linear group over shewfields;

Let A and B be two transvections,with a P∈GL_n(F),satisfing P~(-1)AP=T_(12)(1),P~(-1)BP can be denoted with five simple forms if A and B are not commutative.

A matrix Ain GL_n(F)is called a transvection if A is similar to T_(12)(1) whose elements on(1,2)-position and principal diagonal are all 1 and 0 else.

Geological characteristics and exploration prospect of Upper Paleozoic reservoirs in Yanchang area,Ordos Basin;

Assessment of sustainable development in Yanbian forest region based on ecological footprint model.;

Although water has the central function of the bloodstream in the biosphere,especially in arid or semi-arid regions such as Yan'an region in Northwest China,yet very limited attention is paid to the role of the water-related processes in ecosystem.

In this article,choose Yan'an region as an example,adopt the methods of ecological security and ecological footprint,and evaluate the sustainability of region development.