Biomechanical Analysis of Camellia oleifera Branches for Optimized Vibratory Harvesting DOI Creative Commons
Rui Pan,

Ziping Wan,

Mingliang Wu

et al.

Agriculture, Journal Year: 2024, Volume and Issue: 14(12), P. 2220 - 2220

Published: Dec. 5, 2024

To investigate the biomechanical properties of Camellia oleifera branches under two loading speeds within a specific diameter range, three-point bending tests were conducted using universal material–testing machine. The performed at 10 mm/min and 20 on with diameters ranging from 5 mm to 40 mm. This study aims provide insights into design manipulator gripper used in vibrating harvester for fruit. Four main varieties tested determine their elastic modulus. nonlinear least squares method, based hyperbolic tangent function, was employed fit load–deflection curves branches. process constructed multi-parameter transcendental equations involving modulus, diameter, speed. Results indicated that four exhibited significant differences properties, modulus elasticity 459.01 MPa 983.33 MPa. suggests variability performance among different varieties. For instance, Huaxin demonstrated highest rigidity, while Huashuo softer general. proposed empirical fitting equations, when parameter k is 168 ± c 3.102 0.421, relationship can be predicted more accurately. provides theoretical basis enhancing efficiency mechanized vibratory picking optimising gripper.

Language: Английский

Unraveling the individual and interactive effects of climate and competition on branch growth dynamics in Pinus koraiensis in Northeast China DOI Creative Commons
Xinyi Zhao,

Miao Zheng,

Fengri Li

et al.

Frontiers in Plant Science, Journal Year: 2025, Volume and Issue: 16

Published: Feb. 5, 2025

Introduction The quantitative modeling of dynamic branch growth in Korean pine ( Pinus koraiensis ) and the analysis factors influencing are essential prerequisites for making scientifically sound management decisions plantations. To date, effects competition, climate their interactions on have been insufficiently investigated. Additionally, limited knowledge exists regarding whether these impacts vary depending social status trees. In face current challenges posed by change, accurate information to inform forest policy-making is urgently needed. Methods We collected 745 branches from 54 sampled trees and, we employed a mixed-effects model assess tree variables, climate, growth. Furthermore, simulated under different combinations competition climatic conditions provide practical targeted recommendations plantation management. Results Our results demonstrate that (1) addition age, size, height growth, significantly improved model, with surpassing individual which highlights importance considering interactive effects; (2) varied trees, dominant intermediate individuals showing greater sensitivity than suppressed individuals, suggesting that, future research this direction, prioritizing sampling would be cost-effective approach; (3) owing presence interactions, influence was modulated adjusting levels response stress could lead desirable outcomes. Discussion study underscores understanding sources variation crucial advancing our crown dynamics, as well formulating sustainable policies amidst uncertainties change.

Language: Английский

Citations

0
Development of Full Growth Cycle Crown Width Models for Chinese Fir (Cunninghamia lanceolata) in Southern China DOI Open Access
Zheyuan Wu,

Dongbo Xie,

Ziyang Liu

et al.

Forests, Journal Year: 2025, Volume and Issue: 16(2), P. 353 - 353

Published: Feb. 16, 2025

This study focused on 16,101 Cunninghamia lanceolata trees across 133 plots in seven cities of Guangdong Province, China, to develop a comprehensive full growth cycle crown width (CW) model. We systematically analyzed the dynamic characteristics CW and its multi-scale influencing mechanisms. A binary basic model, with diameter at breast height (DBH) (H) as core predictor variables, effectively reflected tree patterns. The inclusion age groups dummy variables allowed model capture changes different stages. Furthermore, incorporation nested two-level nonlinear mixed-effects (NLME) accounting for random effects from forest block- sample plot-level effects, significantly improved precision applicability final (R2 = 0.731, RMSE 0.491). quantified both macro- micro-level region plot CW. Our findings showed that NLME incorporating groups, optimally accounted environmental heterogeneity cycles, resulting best-fitting statistics. proposed enhanced model’s efficiency predictive accuracy lanceolata, providing scientific support sustainable management monitoring plantation forests.

Language: Английский

Citations

0
National Stand Basal Area, Volume and Biomass Growth Models with the Inclusions of Stand Structure for Larch Plantations in China DOI
Yangping Qin, Xiao He, Hong Guo

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
Modeling tree radial growth with competition and crown characteristics from an aerial perspective DOI
Xin Liu, Fengri Li, Yuanshuo Hao

et al.

Forest Ecology and Management, Journal Year: 2024, Volume and Issue: 576, P. 122387 - 122387

Published: Nov. 16, 2024

Language: Английский

Citations

0
Biomechanical Analysis of Camellia oleifera Branches for Optimized Vibratory Harvesting DOI Creative Commons
Rui Pan,

Ziping Wan,

Mingliang Wu

et al.

Agriculture, Journal Year: 2024, Volume and Issue: 14(12), P. 2220 - 2220

Published: Dec. 5, 2024

To investigate the biomechanical properties of Camellia oleifera branches under two loading speeds within a specific diameter range, three-point bending tests were conducted using universal material–testing machine. The performed at 10 mm/min and 20 on with diameters ranging from 5 mm to 40 mm. This study aims provide insights into design manipulator gripper used in vibrating harvester for fruit. Four main varieties tested determine their elastic modulus. nonlinear least squares method, based hyperbolic tangent function, was employed fit load–deflection curves branches. process constructed multi-parameter transcendental equations involving modulus, diameter, speed. Results indicated that four exhibited significant differences properties, modulus elasticity 459.01 MPa 983.33 MPa. suggests variability performance among different varieties. For instance, Huaxin demonstrated highest rigidity, while Huashuo softer general. proposed empirical fitting equations, when parameter k is 168 ± c 3.102 0.421, relationship can be predicted more accurately. provides theoretical basis enhancing efficiency mechanized vibratory picking optimising gripper.

Language: Английский

Citations

0