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云南省林业科学院专利:一种竹笋生长测量装置
云南省林科院 竹笋 生长测量装置
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2024/3/22
本实用新型公开了一种竹笋生长测量装置,包括底座,底座的上端转动连接有卷线轮,卷线轮上缠绕有测量线,卷线轮的一端设置有壳体,壳体内设置有随卷线轮转动的转轴,壳体内安装有单片机、电池、计时模块、存储模块,转轴的侧壁安装有永久磁体,壳体内壁的一侧安装有与永久磁体位置相对应的霍尔传感器,壳体的上端设置有显示屏,电池、计时模块、存储模块、霍尔传感器及显示屏均与单片机电连。本实用新型能够在竹笋生长的过程中实时...
石家庄市农林科学研究院专利:新型阔叶植物叶面积活体测定装置
石家庄市农科院 阔叶植物 叶面积 活体测定装置
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2024/3/18
本实用新型公开了新型阔叶植物叶面积活体测定装置,包括防护箱和叶面积测定仪,所述防护箱的顶部通过合页活动连接有盖板,所述防护箱内腔底部的左端固定连接有橡胶缓冲垫,所述橡胶缓冲垫的表面与防护箱内腔的左端之间固定连接有海绵缓冲座,所述叶面积测定仪两侧的中端均固定连接有空心橡胶条,所述空心橡胶条的内腔固定连接有海绵缓冲条。本实用新型通过防护箱和盖板的设置,便于对叶面积测定仪进行盛放,并同海绵缓冲座和橡胶缓...
云南省林业科学院专利:一种基于地径的云南古茶树树龄的判定方法
云南省林科院 云南古茶树 树龄 判定方法
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2024/3/15
本发明提供了一种基于地径的云南古茶树树龄的判定方法,按下述步骤完成,(1)选择风倒或死亡的云南古茶树作为代表性样本,测量地径(cm);(2)将古茶树锯成圆盘,用砂磨机将其表面打磨光滑,至年轮清晰可见;(3)利用winDENDROPRO年轮分析系统,确定两个垂直方向的年轮数,最后取其平均值为该树的树龄;(4)用Origin9.1软件对原始数据建立散点图,其中,地径为横坐标x,树龄为纵坐标y;(5)对...
云南省林业科学院专利:一种确定极小种群野生植物保护小区数量、位置和面积的方法
云南省林科院 极小种群 野生植物 保护小区
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2024/3/15
本发明公开了一种确定极小种群野生植物保护小区数量、位置和面积的方法,包括三个如下步骤:S1:依据种群调查结果统计天然种群的数量及大小,确定出目的物种种群数、总株数和各种群株数的步骤;S2:确定分布于已建保护地的种群数及其株数的步骤;S3:确定极小种群野生植物保护小区数量、位置和面积的步骤。本发明解决了自然保护小区对特定目的物种针对性不强且缺乏确定保护小区数量、位置和面积技术方法的问题,为极小种群野...
云南省林业科学院专利:一种树冠测量装置
云南省林科院 树冠 测量装置
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2024/3/15
本实用新型公开了一种树冠测量装置,其中树冠测量装置包括:支撑部,设置在支撑部上的导向装置;第一测量杆与支撑部转动连接,导向装置与支撑部固定连接,第一测量杆上设置有可沿着第一测量杆延伸方向移动的第一伸缩测量部。本实用新型公开的树冠测量装置可以不受光照和树木所在地的地况的影响精准测量出树冠冠幅,且操作方式简易,大大减少了测量者的工作量。
云南省林业科学院专利:树木大胸径测量设备
云南省林科院 树木 大胸径 测量设备
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2024/3/15
本实用新型公开了树木大胸径测量设备,包括第一测量杆和第二测量杆,第二测量杆之间设置有连接装置,第二测量杆开设有开槽,第二测量杆一端的中部与连接板固定连接,开槽的内腔与连接板转动套接,第二测量杆上表面的一端对称开设有螺纹孔,连接板上表面的一端开设有通孔,其中一个螺纹孔的内腔螺纹套接有第一销轴,第一销轴外壁的中部与通孔转动套接,其中另一个螺纹孔的内腔螺纹套接有第二销轴,第二销轴的底部与连接板贴合连接。...
Aerodynamic Performance of Hex-Rotor UAV Considering the Horizontal Airflow
aerodynamic model dynamic model transition flight trim method transition strategy calculation case
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2024/1/23
A vertical take-off and landing (VTOL) unmanned aerial vehicle (UAV) can meet both VTOL and horizontal flight performance, but how to achieve a safe and stable transition is a research focus of this t...
Optimal Input Features for Tree Species Classification in Central Europe Based on Multi-Temporal Sentinel-2 Data
tree species classification Sentinel-2 multi-temporal Wienerwald biosphere reserve
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2024/1/23
Detailed knowledge about tree species composition is of great importance for?forest?management. The two identical European Space Agency (ESA) Sentinel-2 (S2) satellites provide data with unprecedented...
Nonlinear control for collision-free navigation of UAV fleet
Sliding mode control Collision free navigation UAV coordination
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2024/1/23
This paper presents the development of a cooperation scheme among unmanned aerial vehicle (UAV). Sliding mode control technique is used to guarantee that the set of robots can follow a reference traje...
Canopy Temperature Differences between Liana-Infested and Non-Liana Infested Areas in a Neotropical Dry Forest
lianas temperature difference thermal infrared remote sensing unmanned?aerial?vehicle?system tropical dry?forest
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2024/1/23
Lianas (woody vines) are important non-structural elements of all tropical forests. Current field observations across the Neotropics suggest that liana abundance is rising as a result of?forest?distur...
Estimating aboveground biomass of the mangrove forests on northeast Hainan Island in China using an upscaling method from field plots, UAV-LiDAR data and Sentinel-2 imagery
Mangroves Aboveground biomass UAV-LiDAR Sentinel-2 Random forest
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2024/1/23
The mangrove forests of northeast Hainan Island are the most species diverse forests in China and consist of the Dongzhai National Nature Reserve and the Qinglan Provincial Nature Reserve. The former ...
Integrating LiDAR, Multispectral and SAR Data to Estimate and Map Canopy Height in Tropical Forests
ALOS-PALSAR dry tropical forest Landsat-8 learning algorithms moist tropical forest Sentinel-1 spatial modelling
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2024/1/22
Developing accurate methods to map vegetation structure in tropical forests is essential to protect their biodiversity and improve their carbon stock estimation. We integrated LIDAR (Light Detection a...
Modelling above-ground biomass stock over Norway using national forest inventory data with ArcticDEM and Sentinel-2 data
Space-borne imagery Stereogrammetry Boreal forest structure Biomass mapping Open data
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2024/1/22
Boreal forests constitute a large portion of the global forest area, yet they are undersampled through field surveys, and only a few remotely sensed data sources provide structural information wall-to...
Estimation of aboveground biomass of Robinia pseudoacacia forest in the Yellow River Delta based on UAV and Backpack LiDAR point clouds
UAV-LiDAR Backpack-LiDAR Individual tree segmentation Forest AGB The Yellow River Delta
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2024/1/22
Forest plantations are an important source of terrestrial carbon sequestration. The forest of Robinia pseudoacacia in the Yellow River Delta (YRD) is the largest artificial ecological protection fores...
Forests Growth Monitoring Based on Tree Canopy 3D Reconstruction Using UAV Aerial Photogrammetry
UAV aerial photography forest monitoring canopy 3D model
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2024/1/22
Land cover monitoring is a major task for remote sensing. Compared to traditional methods of forests monitoring which mostly use orthophotography from satellites or aircraft, there is very little rese...