Wang Shuli

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The basic principle of life table method is described, and the method of tree height instead of tree age in static life table is suggested, and it is also discussed that the possibility of natural poplar-birch forest recover to broad-leaf Korean pine forest on low pitches in the Xiaoxing’an Mountains by this method. If there is no particular situation,(More)
Korean pine population structure in natural Korean pine forest was studied through massive field investigation and indoor analysis. Small-diameter Korean pines’ origination, growth character and their roles in stand were discussed from the view of population origination and tree growth. The results show that small-diameter Korean pines’ origination and(More)
Electric propulsion system of two seat electric aircraft used permanent magnet synchronous motor as the main drive, combined with vector control system. The aircraft is suffered impact of airflow with a certain chaotic characteristics while the vector control system ignores the chaotic characteristics of airflow impact force. Permanent magnet synchronous(More)
According to a great deal of field investigation and detailed indoor analysis, the natural regeneration pattern and process of Korean pine population under natural Poplar-birch forest has been uncovered. The results show that the regeneration quantity and quality of Korean pine population under mountainous Poplar-birch forest and mountainous white birch(More)
The community ecology of Poplar-Birch forest in China was studied. It includes the distribution, classification, structure, growth, regeneration, succession and forest management. Research direction of community ecology and forest management for Poplar-Birch forest was pointed out. Further studies should be made on the relation between stand and ecological(More)
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