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| 1 | Mapping aboveground biomass and its prediction uncertainty using LiDAR and field data, accounting for tree-level allometric and LiDAR model errors显示文摘Background: The increasing availability of remotely sensed data has recently challenged the traditional way of performing forest inventories, and induced an interest in model-based inference. Like traditional design-based inference, model-based inference allows for regional estimates of totals and means, but in addition for wall-to-wall mapping of forest characteristics. Recently Light Detection and Ranging(LiDAR)-based maps of forest attributes have been developed in many countries and been well received by users due to their accurate spatial representation of forest resources. However, the correspondence between such mapping and model-based inference is seldom appreciated. In this study we applied hierarchical model-based inference to produce aboveground biomass maps as well as maps of the corresponding prediction uncertainties with the same spatial resolution. Further, an estimator of mean biomass at regional level, and its uncertainty, was developed to demonstrate how mapping and regional level assessment can be combined within the framework of model-based inference.Results: Through a new version of hierarchical model-based estimation, allowing models to be nonlinear, we accounted for uncertainties in both the individual tree-level biomass models and the models linking plot level biomass predictions with LiDAR metrics. In a 5005 km2 large study area in south-central Sweden the predicted aboveground biomass at the level of 18 m×18 m map units was found to range between 9 and 447 Mg·ha^-1. The corresponding root mean square errors ranged between 10 and 162 Mg·ha^-1. For the entire study region, the mean aboveground biomass was 55 Mg·ha^-1 and the corresponding relative root mean square error 8%. At this level 75%of the mean square error was due to the uncertainty associated with tree-level models.Conclusions: Through the proposed method it is possible to link mapping and estimation within the framework of model-based inference. Uncertainties in both tree-level biomass models and models linking plot level biomass with LiDAR data are accounted for, both for the uncertainty maps and the overall estimates. The development of hierarchical model-based inference to handle nonlinear models was an important prerequisite for the study. | Svetlana Saarela AndréWästlund Emma Holmström Alex Appiah Mensah Sören Holm Mats Nilsson Jonas Fridman Göran Ståhl | 2020 | Forest Ecosystems2020，7，3： | 3 |
| 2 | FeNb在钢液中的溶化行为及在钢包精炼过程中提高Nb收得率的最佳工艺显示文摘阐述了标准铌铁(FeNb)的微观组织特性及其溶入钢液中的研究结果。在实验室的感应炉中进行了不同温度下的非连续试验,分析了固相FeNb与钢液凝固层界面的微观组织,并与原始FeNb粒子的微观组织进行了对比。这些试验研究结果可以阐释FeNb的溶解机制和它在不同炼钢温度下的融入动力学条件。标准FeNb在钢水中溶解的试验结果证实FeNb颗粒的溶解速率高于有关文献中报告的结果,它们认为FeNb粒子的熔化温度高(>1600℃),所以在其模型中假定FeNb的溶解仅是通过固相粒子的扩散实现。本项工作得到的试验证据为标准FeNb的溶解机理提供了一种新的说法:在1500~1510℃受其共晶区的熔化行为控制,在1530~1575℃温度范围内则由初始板条相的熔化行为所主导,也就是说,均低于1600℃左右的炼钢温度。根据这些研究结果和炼钢厂已有的生产经验,对于微合金化钢在二次精炼阶段加入FeNb推荐了最优的工艺。 | Edmundo Burgos Cruz Daniel Pallos Fridman Marcelo C Carboni Rogério Contato Guimares Marcos A Stuart Nogueira Ferdinando Luiz Cavallante 王厚昕 | 2010 | 世界钢铁2010，，6： | 2 |
| 3 | Chattering Analysis in Sliding Mode Systems with Inertial Sensors 显示文摘 | Leonid M Fridman | 2003 | International Journal of Control (S0020- 7179)2003，76，6： | 1 |
| 4 | Totol homocysteine levels in plasma:high-performance liquid choromatographic determination with electrochemical detection and glassy carbon electrode 显示文摘 | Finkelstein AE Boccazzi FO Fridman O | 1998 | J Chromatogr B1998，720，12： | 1 |
| 5 | Control of apoptosis by p53显示文摘 | Fridman JS Lowe SW | 2003 | Oncogene2003，22，56： | 1 |
| 6 | Matrix metalloproteinases: structures, evolution, and diversifi- cation 显示文摘 | Massova LP Kotra R Fridman S | 1998 | FASEB J1998，12，： | 1 |
| 7 | Effects of small of delays on stability of singularly perturbed systems 显示文摘 | Fridman E | 2002 | Automatica (S0005-1098)2002，38，5： | 1 |
| 8 | A Descriptor System Approach to Control of Linear Time-Delay Systems 显示文摘 | E FRIDMAN U SHAKED | 2002 | IEEE Trans Automat Control2002，47，： | 1 |
| 9 | Isoperimetric estimates for the first eigenvalue of the p-Laplace operator and the Cheeger constant 显示文摘 | Kawoh] B Fridman V | 2003 | Comment Math Univ Carolin2003，44，： | 1 |
| 10 | Stability and L2-gain analysis of networked control systems under round-robin scheduling:a time-delay approach显示文摘 | Liu K Fridman E Hetel L | | 0，，05： | 1 |
| 11 | NOx and CO emissions of lean and ultra-lean filtration combustion of methane/air mixtures in an inert porous media显示文摘 | BINGUE J P SAVELIEV A V FRIDMAN A A | 2002 | Clean Air2002，3，2： | 1 |
| 12 | Transvaginal ultrasound and diagnostic hysteroscopy as a predictor of endometrial polyps: risk factors for premalignancy and malignancy显示文摘 | R. MACHTINGER J. KORACH A. PADOA E. FRIDMAN M. ZOLTI J. SEGAL Y. YEFET M. GOLDENBERG G. BEN-BARUCH | 2005 | International Journal of Gynecological Cancer2005，，2： | 1 |
| 13 | A Cognitive Model of Crowd Behavior Based on Social Comparison Theory 显示文摘 | Gal A Kaminka Natalie Fridman | 2006 | American Association for Artificial Intelligence (S0738-4602)2006，7，： | 1 |
| 14 | A senescence program controlled by p53 and p16INK4a contributes to the outcome of cancer therapy显示文摘 | Schmitt CA Fridman JS Yang M | 2002 | Cell2002，109，3： | 1 |
| 15 | Atmospheric pressure plasma of dielectric barrier discharges显示文摘 | Chirokov A Gutsol A Fridman A | 2005 | Pure Appl Chem2005，77，2： | 1 |
| 16 | Enhanced tumor growth of both primary and established human and murine tumor cells in athymic mice after coinjection with Matrigel 显示文摘 | Fridman R Kibbey MC Royce LS | 1991 | J Natl Cancer Inst1991，83，11： | 1 |
| 17 | An epi-allelic series of p53 hypomorphs created by stable RNAi produces distinct tumor phenotypes in vivo 显示文摘 | Hemann M T Fridman J S Zilfou J T | 2003 | Nat Genet2003，33，： | 1 |
| 18 | Matrix Metalloproteinases:structures,evolution,and diversification 显示文摘 | MASSOVA I KOTRA LP FRIDMAN R | 1998 | FASEB J1998，12，12： | 1 |
| 19 | A new H∞ filter design for linear time delay systems显示文摘 | Fridman E Shaked U | 2001 | IEEE Transactions on Signal Processing2001，49，11： | 1 |
| 20 | Fetal cardiac function assessed by Doppler myocardial performance index (Tel Index) 显示文摘 | Fridman D Buyon J Kim M | 2003 | Ultrasound Obstet Gynecol2003，21，1： | 1 |
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