zero-power experiment

The relationship between the characteristics of the changes in edaphon community and the incidence of root rot in sanqi ( Panax notoginseng ( Burk) F.H.Chen) was studied and the main pathogenic microbes were identified in a fixed zero tillage experiment.

通过对三七免耕种植定位研究，找出了三七根腐病高发期与土壤微生物类群变化特征的差异，鉴定出了主要病原微生物类群。

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Experiment results show that different oil-layer groups have a different maximum Lyapunov exponent, all greater than zero.

实验结果表明，不同的油层组具有不同的最大Lyapunov指数，所有油层组的最大Lyapunov指数均大于0。

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The Y connection and delta connection of transformer in DVR is simulated with Matlab and the three-phase four-wire structure with Y connection is used in the experiment, which can compensate zero voltage component of source voltage by approved SVPWM algorithm.

分别对变压器不同的连接方法进行了Matlab系统仿真，并对变压器星形连接的三相四线结构和改进的SVPWM控制方法作了实验，解决了系统中存在电压零序分量问题。

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