Research on Establishment the Quality Evaluation Indicator System for Cross-section of Caragana;

Thus,the experiment of cutting was carried out for Calligonum arborescens(7a),and then its benefit was analyzed based on the monitoring data in middle part of shelterbelt along the Tarim Desert for long time.

Cutting could not only rejuvenate the plants, but also increase the yield and ratio of edible parts (leaves and tender stems).

According to the degradation reasons of Nitraria shrub and by the two measures of manual rainfall and cutting,the growth\,biolmass\,species diversity and soil moisture content were analyzed.

In the meantime,the rejuve-nation measures of stumping the wind protection & sand fixing forests of 4 years-old Calligonum rubicundunma in different season and with different stubble height were also studied in this paper.

The experiment of stumping of Hedysarum scoparium forest was carried out in Yellow River Divert-ing Irrigation Area.

The optimum time of stumping is in the middle and last ten days of April.

Based on the analytical method (2d-3DOF method) for two-dimensional three degrees of freedom coupling flutter, the flutter-driving mechanism and flutter modality of the classical coupled bending-torsional flutter phenomenon about thin plate sections were investigated.

Combining the practical work experience, the paper points out the shortcoming of average cross-section method in computing earth and rockfill volume, and presents a new method--change average cross-section method.

Using this system,the processing parts for inner work can receive the data gathered from outer work and aerial survey,and the plane section or the hydrology section drawing can be created automatically.