This page provides options for meeting the requirement to create notices of privacy practices (NPP). HHS developed the model NPPs you see on this site to help improve patient experience and understanding.

2013年5月3日 · 为了快速、便捷地实现中国草地净初级生产力 (NPP)的估算,在获取野外调查资料与同期遥感影像数据的基础上,利用归一化植被指数 (NDVI)以及气候数据,构建了草地NPP综合估算模型。 模型包括叶面积指数 (LAI)和光合累积量 (PA)两个子模型,其中LAI子模型利用了遥感数据NDVI,PA子模型利用了温度、降水和辐射等气候数据。通过建模以外独立的实测数据的验证,模拟值与实测值之间有很好的相关性, R2 为0.8519,相关性达到极显著水平。 RMSE和RRMSE均较 …

2021年11月18日 · In this study, we used meteorological data as input data, the estimated NPP using climate productivity model (Thornthwaite Memorial model), synthetic model and CASA model were compared with MOD17A3-NPP as the reference data over China during the past 16 years (2000–2015).

2022年9月9日 · The goal of the MOD17 MODIS project is to provide continuous estimates of Gross/Net Primary Production (GPP/NPP) across Earth’s entire vegetated land surface. MOD17 GPP/NPP outputs are useful for natural resource and land management, global carbon cycle analysis, ecosystem status assessment, and environmental change monitoring.

2013年3月10日 · To estimate NPP accurately, we integrated photosynthetically active radiation (PAR) with a light use efficiency model, derived from Moderate Resolution Imaging Spectroradiometer atmospheric and land products. Validation analyses showed that the PAR and NPP values simulated by the model matched observed data well.

2024年7月1日 · We discover that there is a progressive increase in NPP in the BTH region from 2001 to 2020. This study proposes a new approach to predict NPP by discretely coupling the PLUS model and the CASA model. According to our research, the predicted NPP in the BTH region will decrease in 2030 compared with 2020.

2022年12月1日 · The main objectives of this study were (1) to develop an NPP prediction model based on temperature and LUCCs and to verify its accuracy; and (2) to simulate the land use/cover changes and predict the NPP in the Sichuan-Chongqing region under different SSP-RCP scenarios from 2020 to 2100.

2012年4月18日 · Net photosynthetic accumulation of carbon by plants, also known as net primary production (NPP), provides the energy that drives most biotic processes on Earth. NPP represents much of the organic matter that is consumed by microbes and animals.

该文在回顾植被npp模型类型的基础上,详述了气候生产力模型、生物地球化学模型、光能利用率模型与生态遥感模型实现的方法与机理,同时强调了遥感估测模型的重要性。

2024年12月24日 · 植被净初级生产力（npp）指绿色植物在单位面积单位时间内通过光合作用积累的有机物质总量，扣除自养呼吸后剩余部分。 有很多 模型 可 估算 NPP ，其中朱文泉提出的 CASA 模型 运用较为广泛，本文将介绍如何运用该方法求算 区域 的 NPP 。