Net primary productivity (NPP) estimation is an important study field of global change and terrestrial ecosystems (GCTE).
植被净初级生产力(NPP)研究是全球变化与陆地生态系统的核心内容之一。
The paper applied the information diffusion model of non-parametric estimation to project the level of productivity risks for cereals, rice, corn and wheat at major grain-producing area.
本文采用非参数估计的信息扩散模型测算了我国粮食主产区水稻、玉米、小麦和棉花产量损失风险水平。
This technique provides necessary means in the studies of the productivity of such low permeability rock formations, reservoir evaluation, active reserve estimation and resource estimation.
为研究低渗透油层产能状况，评价油层以及预测控制储量和远景储量，提供必要的研究手段和方法。
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