搜索结果: 1-15 共查到“知识库 森林测量学”相关记录35条 . 查询时间(3.125 秒)
在东北三省调查水曲柳临时样地198块,收集234株优势木数据和19株解析木数据,通过对查数年龄木芯的严格筛查,剔除了被压木,确定用于编表的数据845组。用9个函数式对水曲柳的年龄与优势木高、胸径与优势木高分别进行模拟,通过相关系数和剩余标准差的比较,选择了理查德函数式作为导向曲线模型。地位指数级14~30 m,级距2 m,用相对树高法展开曲线簇。经过相关系数检验、X^(2)检验和落点检验,地位指数...
A Complete Transcriptional Landscape Analysis of Pinus elliottii Engelm. Using Third-Generation Sequencing and Comparative Analysis in the Pinus Phylogeny
Pinus elliottii Transcriptional Landscape Analysis Pinus Phylogeny
2023/6/5
The planting of Pinus elliottii Engelm. has now reached close to three million ha in China. Molecular breeding as part of the improvement program for P. elliottii in southern China has been carried ou...
SPATIO-TEMPORAL ASSESSMENT OF MARGALLA HILLS FOREST BY USING LANDSAT IMAGERY FOR YEAR 2000 AND 2018
Change Detection LULC Supervised Classification Satellite Remote Sensing LANDSAT ETM+ and OLI
2018/5/11
Environmental imbalance due to human activities has shown serious threat to ecosystem and produced negative impacts. The main goal of this study is to identify, monitor and classify temporal changes o...
MULTI-TEMPORAL CLASSIFICATION AND CHANGE DETECTION USING UAV IMAGES
Change Detection Random Forest Fully Connected CRF UAV images
2018/6/4
In this paper different methodologies for the classification and change detection of UAV image blocks are explored. UAV is not only the cheapest platform for image acquisition but it is also the easie...
APPLYING RANDOM FOREST CLASSIFICATION TO MAP LAND USE/LAND COVER USING LANDSAT 8 OLI
Classification Landsat 8 OLI Land use Land cover Random Forest Decision Tree
2018/4/18
This study used the Random Forest classifier (RF) running in R environment to map Land use/Land cover (LULC) of Dak Lak province in Vietnam based on the Landsat 8 OLI. The values of two RF parameters ...
RAPID MAPPING OF FORESTED LANDSLIDE FROM ULTRA-HIGH RESOLUTION UNMANNED AERIAL VEHICLE DATA
UAV landslide object-based image analysis Bartı n Black Sea Region rapid mapping
2018/5/8
The Black Sea Region is one of the most landslide prone area due to the high slope gradients, heavy rainfall and highly weathered hillslope material conditions in Turkey. The landslide occurrences in ...
Does prolonged stratification of Douglas fir influence the yield of seedlings?
provenance germination emergence
2015/7/2
A total of ten seed lots were used for evaluating germination capacity, originating from the Czech Republic, Slovakia,
France and the USA. Germination capacity, emergence rate and yield of seedlings...
On the way to continuous cover forest at middle elevations – the question of forest structure and specific site characteristics
Dauerwald stand transformation diversity production waterlogged site
2015/4/24
The transformation process of even-aged forest stands to irregular forest stands on waterlogged sites after 20 years effort was analysed. Data from two 1-ha PRP was analysed with special focus on stru...
Free European data on forest distribution: overview and evaluation
tree species distribution data quality forest management plans accuracy assessment
2015/4/24
A growing need for the evaluation of prospects and sustainability of forest resources calls for the availability of harmonized data on forest distribution. We described and evaluated nine datasets pro...
Analytical hierarchy process to choose the best earthwork machine in northern forests of Iran
best selection earthwork machine environmental criteria analytical hierarchy process northern forests
2015/4/24
This study attempts to use the analytical hierarchy process to choose the most appropriate earthwork machine for slope classes of 30–50% and 50–70%. Required data were collected by pairwise comparison...
Determination of correction coefficient of average skidding distance according to the existing road network in Alikia Soltan forest of Iran
theoretical average skidding distance real average skidding distance skid trails
2015/4/24
One of the factors in planning forest roads is average skidding distance which is calculated in projects from the map, according to forest road density, however it has a low accuracy. In this study re...
Modelling of tree diameter growth using growth functions parameterised by least squares and Bayesian methods
growth function nonlinear least squares Bayes diameter estimation
2015/4/14
The purpose of this paper is to present a new growth and yield function (denoted as KM-function), which was empirically derived from the cumulative density function of the Kumaraswamy probability dist...
Steady infiltration rates estimated for a mountain forest catchment based on the distribution of plant species
Bohemian Forest experimental catchment infiltration map mountain Podzols vegetation cover
2015/4/14
Among other important factors, vegetation cover strongly affects the hydrological processes in mountain catchments. In this paper, we present the results of field infiltration measurements at the loca...
Analysis of the accuracy of GPS Trimble JUNO ST measurement in the conditions of forest canopy
forest canopy impact GPS GPS device accuracy location precision mean square error Trimble JUNO ST
2015/3/20
GPS Trimble JUNO ST was tested at 16 points under forest canopy. The measurements were done on three different dates of the growing seasons in 2007 and 2008. On each date, 4 recordings were measured i...
Road network optimization using heuristic and linear programming
cable yarding mixed integer programming network analysis optimum road density production
2015/3/20
To minimize the cost of logging, it is necessary to optimize the road density. The aim of this study was to determine optimal road spacing (ORS) in Northern Austria. The stepwise regression method was...