从植物种群水平、植物功能群水平到群落水平，地上生物量的年度间变异性逐渐降低，稳定性逐渐增加。
From population level to functional group level, and then to community level, the yearly-variation of aboveground biomass minimizes gradually and stability increases.
在此基础上，讨论了生物-光学变异性与海洋物理过程的关系。
In addition, an analysis was made on the relationship between the temporal variability of bio-optical properties and the physical parameters.
相似性假说通过物种构成的相似性来解释物种丧失是如何影响生物量的变异性的，但还没有得到检验。
The similarity hypothesis may explain how biodiversity loss influences variability in biomass of plant communities but remains untested.
目的：应用心率变异性的频域指标探讨肌电生物反馈中的心脏自主神经系统功能活动的量化改变。
Objective: to explore the change of activities of the cardiac autonomic nervous system in the EMG biofeedback with the quantified index of heart rate variability (HRV).
目的：应用心率变异性的频域指标探讨肌电生物反馈中的心脏自主神经系统功能活动的量化改变。
Objective: to explore the change of activities of the cardiac autonomic nervous system in the EMG biofeedback with the quantified index of heart rate variability (HRV).
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