In accordance with Marx's cost-price theory,established is an exploration cost model in value assessment of oil reserves,which describes the differential profit of an oil reserve unit by way of value grading.

The achievements include the development and application of the value grading technology of oil resources, and the research on the exploration cost model and the profits' present value model in value assessment of oil resources.

As a value-contained category, practice is the start point of value, the dynamic formation process of value, the handling process of contradictions of value relationships and the higher value of human beings.

This paper,based on value chain theory,focused on discussing the new approaches,concepts or ideas and new issues in value chain upgrading in overseas forest products industries and discussing the impact on value chain upgrading in Chinese forest products processing industry.

The classification evaluation in desertification ground resource can direct reflected its distributing characteristic, production diversification and potential and soil fertility, so opinion method and level is very important.

This paper analyzes and researches the existent classification evaluation model,then a new classification evaluation model of statistic data——the classification evaluation model of multiattribute decision-making is put forward,based on mathematical statistic and decision-making theoretics,choosing the classification precision,the quantity of information and classifica.

Then from users welfare, marginal outage cost (MOC) is discussed in energy cost and point out the model of priority pricing depended on the theory of margina.