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| 1 | Mapping forest age using National Forest Inventory,airborne laser scanning,and Sentinel-2 data显示文摘Background:The age of forest stands is critical information for forest management and conservation,for example for growth modelling,timing of management activities and harvesting,or decisions about protection areas.However,area-wide information about forest stand age often does not exist.In this study,we developed regression models for large-scale area-wide prediction of age in Norwegian forests.For model development we used more than 4800 plots of the Norwegian National Forest Inventory(NFI)distributed over Norway between latitudes 58°and 65°N in an 18.2 Mha study area.Predictor variables were based on airborne laser scanning(ALS),Sentinel-2,and existing public map data.We performed model validation on an independent data set consisting of 63 spruce stands with known age.Results:The best modelling strategy was to fit independent linear regression models to each observed site index(SI)level and using a SI prediction map in the application of the models.The most important predictor variable was an upper percentile of the ALS heights,and root mean squared errors(RMSEs)ranged between 3 and 31 years(6%to 26%)for SI-specific models,and 21 years(25%)on average.Mean deviance(MD)ranged between^(−1) and 3 years.The models improved with increasing SI and the RMSEs were largest for low SI stands older than 100 years.Using a mapped SI,which is required for practical applications,RMSE and MD on plot level ranged from 19 to 56 years(29%to 53%),and 5 to 37 years(5%to 31%),respectively.For the validation stands,the RMSE and MD were 12(22%)and 2 years(3%),respectively.Conclusions:Tree height estimated from airborne laser scanning and predicted site index were the most important variables in the models describing age.Overall,we obtained good results,especially for stands with high SI.The models could be considered for practical applications,although we see considerable potential for improvements if better SI maps were available. | Johannes Schumacher Marius Hauglin Rasmus Astrup Johannes Breidenbach | 2020 | Forest Ecosystems2020，7，4： | 3 |
| 2 | 氨对垃圾焚烧飞灰浸出特性的影响及地球化学模拟显示文摘垃圾焚烧飞灰可能因为选择性非催化还原法(SNCR)脱硝过程中氨泄漏、垃圾携带的渗滤液受热挥发等原因而吸附氨.本研究中采用人为添加氨水,在pH为3.66~12.44范围内,研究氨对飞灰中溶解性有机碳(DOC)和重金属浸出的影响,并利用地球化学模拟软件Visual MINTEQ从金属化学形态分布上分析氨对飞灰浸出的影响机制.结果表明,DOC在pH>9和有高浓度氨(≥1 357 mg·L-1)存在时,其浸出量大幅增加,而在浸出液中氨的水平不高于537 mg·L-1时则受氨的影响很小;在pH<6时,飞灰中各金属主要以自由态的金属离子和金属-氯络离子形态大量溶出,且受氨的影响较小;而在pH为8~12的碱性环境中和氨浓度较高时(≥3 253 mg·L-1),氨与金属生成了可溶性的金属-氨配合物,能显著增加Cd、Cu、Ni、Zn的浸出,且在pH=9附近时浸出量达到最大值,但氨对Al和Pb的浸出影响甚微;在pH>12时,Cd、Cu、Ni、Zn主要以羟基金属离子形式存在.在氨浓度为3 253 mg·L-1时,通过利用Visual MINTEQ模拟浸出值与试验数据的对比,发现Al、Pb、Zn的浸出主要由溶解/沉淀模型控制,而Cd、Cu、Ni由溶解/沉淀模型和表面吸附反应模型同时控制,且Visual MINTEQ模型能较好地预测飞灰中Al、Cu、Pb、Zn的浸出特性. | 官贞珍 陈德珍 Thomas Astrup | 2013 | 环境科学2013，34，6： | 2 |
| 3 | Is butyrate the link between diet, intestinal microbiota and obesity‐related metabolic diseases?显示文摘 | L. K. Brahe A. Astrup L. H. Larsen | 2013 | Obes Rev2013，，12： | 2 |
| 4 | Targeting Dexamethasone to Macrophages in a Porcine Endotoxemic Model显示文摘 | Asger Granfeldt Christine Lodberg Hvas Jonas Heilskov Graversen Peter Astrup Christensen Mikkel Due Petersen Gabriela Anton Pia Svendsen Christoffer S?lling Anders Etzerodt Else T?nnesen S?ren Kragh Moestrup Holger Jon M?ller | 2013 | Critical Care Medicine2013，，11： | 2 |
| 5 | The fibrin plate method for estimating fibrinolytic activity显示文摘 | Astrup T Muhertz S | 1952 | Arch Biochem BiopHys1952，40，： | 1 |
| 6 | The fibrin plate method for estimating of fibrinolytic activity显示文摘 | ASTRUP T MULLERTZ S | 1952 | Archives of Biochemistry and Biophysics1952，40，： | 1 |
| 7 | The fibrin plate method for the estimation of fibrinolytic activity显示文摘 | Astrup T Astrup T Mullertz S | 1952 | Arch Biochem Biophs1952，40，： | 1 |
| 8 | The Role of Energy Expenditure in the Development of Obesity显示文摘 | Astrup A | 1998 | Int J Obesity1998，22，3： | 1 |
| 9 | The Fibrin Flates Methods for Esti-mating Fibrinolytic Activity显示文摘 | ASTRUP T S MUHERTZ S | 1995 | Arch Biotech Biophysn1995，40，2： | 1 |
| 10 | The Fibrin Plate Method for Estimating Fibrinolytic Activity显示文摘 | ASTRUP T MULLERTZ S | 1952 | Archives of Biochemistry and Biophysics1952，40，2： | 1 |
| 11 | Estima- ting Spruce and Pine Biomass with Interferometric X-band SAR显示文摘 | Solberg S Astrup R Gobakken T | | 0，，10： | 1 |
| 12 | Glucagon-like peptide-1 promotes satiety and suppress energy intake in humans显示文摘 | Flint A Raben A Astrup A | 1998 | J Clin Invest1998，101，3： | 1 |
| 13 | The fibrin plate method for estimating fibrinolytic activity显示文摘 | Astrup T Müllertz Sten | 1952 | Arch Biochem Biophys1952，40，： | 1 |
| 14 | The fibrin plate method for estima- ting fibrinolytie aetivity显示文摘 | Astrup T Mi~llerl:z S | 1952 | Archi''ves of Biockemistry arzd Biopkysics1952，40，： | 1 |
| 15 | The fibrin plate method for estimating fibrinolytic activity显示文摘 | Astrup T Mullertz S | 1952 | Archs Biochem Biophys1952，40，2： | 1 |
| 16 | The fibrin plate method for estimating fibrinolytic activity显示文摘 | ASTRUP T MULLERTZ S | 1952 | Arch Biochem Biophys1952，40，： | 1 |
| 17 | In situ studies of the initial atmospheric corrosion of copper influence of humidity,sulfur dioxide,ozone,and nitrogen dioxide显示文摘 | ASTRUP T WADSAKM J LEYGRAF C | 2000 | Journal of the Electrochemical Society2000，147，7： | 1 |
| 18 | Thresholds in cerebral ischemia-the ischemic penumbra 显示文摘 | Astrup J Siesjo B K Symon L | 1981 | Stroke1981，12，6： | 1 |
| 19 | The fibrin plate method for estimating fibrinolytic activity 显示文摘 | Astrup T Mullertz S | 1952 | Arch Biochem Biophys1952，40，： | 1 |
| 20 | Thresholds in cerebral ischemia: the ischemic penumbra显示文摘 | Astrup J Siesjo BK Symon L | 1981 | Stroke1981，12，6： | 1 |
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