Structure forecast on advantaged coal-bearing district in Longxian region of Ordos Basin;

Relation between infilling patterns of short-term base-level cycle and macroscopic reservoir heterogeneity-taking Chang6 to Chang7 turbidite fan of Yanchang Formation in Longdong area as an example;

Sequence stratigraphic characteristics of the Yanchang Formation in the Longdong area and their significance for petroleum exploration;

Source analysis and depositional systems of Upper Triassic early and mid-term Yanchang Formation in Longdong area;

A dynamic evaluation fragile environment in Longnan District;

Feature and mechanism of the social-economic system in poverty-stricken areas characterized by ecological frailties ——Taken Longnan District as a case;

The fragile ecological environment has been formed for a long time in Longnan district,which is located in the transitional zone among the southern of Gansu Province,thus it is particularly vulnerable to degradation due to its fragile ecosystem and the utilization of natural resources especially water and soil resource.

Status quo and countermeasures of leisure sports activities in Longnan area of Gansu Province;

Medicinal plant resources are abundant in Longnan area.

By the field survey and the analysis of indoor samples,the authors made a study of the Quaternary debris flow sediments and the formation history in Longnan area of the eastern fringe of Tibetan Plateau , and thinks that the Quaternary debris flow s activities in Longnan are amainly concentrate on 2.

The adjustment of agriculture and foresty structure is pressing in Longdong district.

Species and ecological distribution of honey bee in different habitats in eastern Gansu;

Sediment accumulation on the steep slope zone of the continental down-warped lacustrine basin and dynamics of sequence filling: An example from the Triassic Yanchang Formation in the Ordos Basin,eastern Gansu;