搜索结果: 1-15 共查到“知识库 density”相关记录991条 . 查询时间(0.609 秒)
Hydrophobic Formulations Based on Tall Oil Distillation Products for High-Density Fiberboards
tall oil bio-refinery water repellents cellulosic fibers dynamic water vapor sorption
2024/1/10
This study investigates the effect of renewable formulations based on tall oil bio-refinery products on the water vapor sorption and interfiber strength of cellulosic fibers as well as on the properti...
Effects of Stand Structure and Topography on Forest Vegetation Carbon Density in Jiangxi Province
stand characteristics terrain factor driving force regression analysis
2023/12/11
Stand structure and topography are important factors affecting forest vegetation carbon density (FVCD). Revealing the interaction mechanisms between stand structure and topography on FVCD is of great ...
Machine learning-based atom contribution method for the prediction of surface charge density profiles and solvent design
atom contribution computer-aided molecular design decomposition-based algorithm machine learning
2023/6/19
Solvents are widely used in chemical processes. The use of efficient model-based solvent selection techniques is an option worth considering for rapid identification of candidates with better economic...
Spectrometric prediction of wood basic density by comparison of different grain angles and variable selection methods
Spectrometric prediction wood basic density
2023/6/2
Background:Wood basic density (WBD) is one of the most crucial wood property in tree and mainly determined the end use of wood for industry. However, the measurement WBD is time- and cost-consuming, w...
Inheritance and Correlation Analysis of Pulpwood Properties, Wood Density, and Growth Traits of Slash Pine
Growth Traits Slash Pine Pulpwood Properties Wood Density
2023/6/5
Slash pine (Pinus elliottii) is the most important and a fast-growing material that is used for industrial timber and pulp production. A breeding program of slash pine that aims to improve wood proper...
QTLs identification for nitrogen and phosphorus uptake-related traits using ultra-high density SNP linkage
QTL F2 populations QTL mapping Nitrogen Phosphorus Rice
2023/4/21
To understand the genetic basis of nitrogen and phosphorus uptake in the cultivated rice, quantitative trait loci (QTL) analysis for 7 nitrogen and phosphorus uptake-related traits including above-gro...
New Opportunities for Forest Remote Sensing Through Ultra-High-Density Drone Lidar
Drone Global Ecosystem Dynamics Investigation (GEDI) Lidar Remote sensing UAV
2024/2/5
Current and planned space missions will produce aboveground biomass density data products at varying spatial resolution. Calibration and validation of these data products is critically dependent on th...
SURFACE SNOW DENSITY OF EAST ANTARCTICA DERIVED FROM IN-SITU OBSERVATIONS
Surface snow density Matrix completion Empirical Orthogonal Function Kriging
2018/5/15
Models based on physical principles or semi-empirical parameterizations have used to compute the firn density, which is essential for the study of surface processes in the Antarctic ice sheet. However...
INFLUENCE OF SKY CONDITIONS ON ESTIMATION OF PHOTOSYNTHETIC PHOTON FLUX DENSITY FOR AGRICULTURAL ECOSYSTEM
PPFD PAR Solar radiation PAR fraction Quantum-to-energy ratio Diffuse ratio Clearness index Sky conditions
2018/5/16
Photosynthetic photon flux density (PPFD: μmol m−2 s−1) is indispensable for plant physiology processes in photosynthesis. However, PPFD is seldom measured, so that PPFD ...
Adaptive k-tree sample plot for the estimation of stem density: An empirical approach
plotless sampling distance sampling bias efficiency forest sampling
2018/3/6
Available budgets for the inventory of non-commercial woodlands are small. Therefore, there has been increased
interest in using distance methods, such as k-tree sampling, which are faster than fixed...
Numerical simulation of response of groundwater flow system in inland basin to density changes
Inland basin Groundwater Flow System TOUGHREACT Fluid density
2018/3/23
The developmental characteristics of groundwater flow system are not only controlled by formation lithology and groundwater recharge conditions, but also influenced by the physical properties of fluid...
Bone mineral density during pregnancy in women participating in a randomized controlled trial of vitamin D supplementation
bone mineral content bone mineral density cholecalciferol pregnancy vitamin D
2018/11/21
Background: Little is known about bone mineral density (BMD) during pregnancy. Advances in technology with lower radiation emissions by dual-energy X-ray absorptiometry instruments now permit the safe...
Impact of logging intensity on stem density, basal area and biodiversity indices five years after logging in a Caspian hardwood forest
harvesting intensity forest biodiversity northern Iran
2017/6/26
The aim of the present study was to analyse the impacts of different logging intensities after five years from logging including non-logged, low (3.4 felled stems per hectare), medium (5.2 felled stem...
Forest density and orchard classification in Hyrcanian forests of Iran using Landsat 8 data
canopy cover Caspian forests satellite data supervised classification support vector machines two-stage sampling
2018/3/6
Satellite-based remote sensing is of crucial importance to provide timely and continuous thematic maps for practical
forestry tasks. There is currently no existing remote sensing-based, large-scale i...
Influence of site conditions and silvicultural practice on the wood density of Scots pine (Pinus sylvestris L.) – a case study from the Doksy locality, Czech Republic
shelterwood regeneration clearcut forest site softwoods physical properties variability
2018/3/6
After spruce, the Scots pine (Pinus sylvestris Linnaeus) is the second most important commercial coniferous tree
species in the Czech Republic. However, we are finding out that awareness of the varia...