Biosystems Engineering最新文献_第2页

Hydrodynamic responses of an aquaculture cube net cage suspended inside a jacket foundation for various net solidities and bottom weights 悬挂在护套基础内的水产养殖立方体网箱对不同网固化度和底重的水动力响应

IF 5.3 1区农林科学

Biosystems Engineering Pub Date : 2025-08-19 DOI: 10.1016/j.biosystemseng.2025.104271

Yuan-Mao Zhang , Chun-Wei Bi , Xue-Wen Zhou , Sen-Qi Cui , Liu-Yi Huang

{"title":"Hydrodynamic responses of an aquaculture cube net cage suspended inside a jacket foundation for various net solidities and bottom weights","authors":"Yuan-Mao Zhang , Chun-Wei Bi , Xue-Wen Zhou , Sen-Qi Cui , Liu-Yi Huang","doi":"10.1016/j.biosystemseng.2025.104271","DOIUrl":"10.1016/j.biosystemseng.2025.104271","url":null,"abstract":"<div><div>The wind-aquaculture integration structure offers significant potential for marine resource use and is gaining increasing attention from academia and engineering community. This study introduces an innovative integrated structure called JOWT-AC, which suspends a net cage within a jacket structure. Based on the lumped-mass method, a cube cage is established within the internal space of the jacket. The contact interaction between the net and the jacket is considered by introducing a penetration model. Based on previous research findings and 1/25 scale flume experiments, the accuracy of the cage motion and tension was validated. The results show that as the current velocity increases, the cage state can be categorised into three stages: the safe aquaculture regime, the square bottom ring contact regime, and the cage unbalance regime. When the net solidity is between 0.12 and 0.20, the cage becomes unbalanced at a current velocity of 1.2 m s<sup>−1</sup>. When the bottom weight ranges from 1000 to 1600 kg, the current velocity at which the cage becomes unbalanced varies. The increase of the bottom weight can effectively enhance the cage's ability to resist unbalance. The research results can provide valuable support for integrated systems design of jacket structure and cage.</div></div>","PeriodicalId":9173,"journal":{"name":"Biosystems Engineering","volume":"258 ","pages":"Article 104271"},"PeriodicalIF":5.3,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144866406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Simulating light quantity and quality over plant organs using a ray-tracing method to investigate plant responses in growth chambers 利用光线追踪方法模拟植物器官上的光量和质量，研究植物在生长室内的反应

IF 5.3 1区农林科学

Biosystems Engineering Pub Date : 2025-08-15 DOI: 10.1016/j.biosystemseng.2025.104256

Sabine Demotes-Mainard , Hervé Autret , Christophe Pradal , Julien Le Gall , Vincent Guérin , Nathalie Leduc , Didier Combes , Christophe Renaud , Michaël Chelle , Jessica Bertheloot

{"title":"Simulating light quantity and quality over plant organs using a ray-tracing method to investigate plant responses in growth chambers","authors":"Sabine Demotes-Mainard , Hervé Autret , Christophe Pradal , Julien Le Gall , Vincent Guérin , Nathalie Leduc , Didier Combes , Christophe Renaud , Michaël Chelle , Jessica Bertheloot","doi":"10.1016/j.biosystemseng.2025.104256","DOIUrl":"10.1016/j.biosystemseng.2025.104256","url":null,"abstract":"<div><div>Ray-tracing models enable the assessment of light quantity and quality intercepted by plant organs, supporting biological studies in growth chambers with varying light conditions. However, their validation within canopies and clear usage methods remain limited. This work establishes a reliable method for using these models. The method includes i) accounting for the intensity and spectrum of light sources in the calibration procedure; ii) a generic calibration strategy using a few well-placed light measurement points based on chamber geometry. It evaluates the method to simulate light phylloclimate at the organ scale across biologically relevant wavebands of contrasted widths and properties. Using the SEC2 light simulation framework, three virtual experiments were conducted in a growth chamber, with and without rose plants. Inputs included chamber geometry, material optical properties, lamp emissions, and digitised plant mock-ups. Simulations were compared with spectral measurements at various chamber positions and sensor orientations, both without plants and inside a canopy. Results showed high accuracy in replicating spatial light variability, with RMSE ranging 0.011 to 0.021 and 0.014–0.038 μmol m<sup>−2</sup>s<sup>−1</sup>nm<sup>−1</sup> across different wavebands and sensor orientations, for vertical and horizontal transects, respectively. Applying this approach to a case study demonstrated its effectiveness in formulating new biological hypotheses regarding the role of local light in regulating bud outgrowth. This was achieved by highlighting differences in phylloclimate induced by variations in plant architecture. This work thus provides a comprehensive framework for facilitating the application of ray-tracing models in growth chamber studies.</div></div>","PeriodicalId":9173,"journal":{"name":"Biosystems Engineering","volume":"258 ","pages":"Article 104256"},"PeriodicalIF":5.3,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144842404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characterisation of airflow resistance of different moisture content wheat bulks mixed with different percentages and sizes of dockage 不同含水率、不同填料比例和尺寸的小麦散装料的气流阻力特性

IF 5.3 1区农林科学

Biosystems Engineering Pub Date : 2025-08-15 DOI: 10.1016/j.biosystemseng.2025.104261

Amin Sadeghizadeh , Fuji Jian , Digvir S. Jayas

{"title":"Characterisation of airflow resistance of different moisture content wheat bulks mixed with different percentages and sizes of dockage","authors":"Amin Sadeghizadeh , Fuji Jian , Digvir S. Jayas","doi":"10.1016/j.biosystemseng.2025.104261","DOIUrl":"10.1016/j.biosystemseng.2025.104261","url":null,"abstract":"<div><div>Airflow resistance is a key factor related to physical properties of grain bulks and is influenced by dockage size and its percentage. A cubic chamber with inner dimensions of 500 × 500 × 500 mm was employed to investigate the airflow resistance of wheat bulks mixed with varying sizes (≤1.1 mm, 1.1–2.0 mm, and ≥3.3 mm) and percentages of dockage (0, 1.0, 2.5, and 5.0 %), along with different moisture contents (14.5, 16.5, and 18.5 %), airflow velocities (1.1–6.6 m s<sup>−1</sup>), and in both vertical and horizontal directions. The airflow resistance decreased with the reduced airflow velocity supplied by the fan, and the supplied airflow rate decreased with the increased airflow resistance. Fine materials (≤1.1 mm) mixed with the clean wheat led to 30–50 % increase of airflow resistance in both directions. Adding 1 % of dockage >3.3 mm (chaff) decreased the airflow resistance by ∼10 %, while adding dockage of 1.1–2 mm size (slightly smaller than wheat) did not result in airflow resistance change. Adding dockage with mixed size had an average 45.6 and 41.2 % increase of airflow resistance in horizontal and vertical directions, respectively. Airflow resistance in both clean and wheat mixture in the vertical direction was ∼50 % higher than that in the horizontal direction in any moisture content of wheat mixtures. This increased airflow resistance in the vertical direction was in the range of 10–117 %. The best regression equation was the Modified Haque model for predicting airflow resistances tested in this study.</div></div>","PeriodicalId":9173,"journal":{"name":"Biosystems Engineering","volume":"258 ","pages":"Article 104261"},"PeriodicalIF":5.3,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144842405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Slurry funnels with frequent discharge and partial pit ventilation reduce ammonia, methane, and odorants emissions in sow housing 频繁排放和部分坑通风的泥浆漏斗减少了母猪房内氨，甲烷和气味的排放

IF 5.3 1区农林科学

Biosystems Engineering Pub Date : 2025-08-14 DOI: 10.1016/j.biosystemseng.2025.104259

Pablo García, Anders Feilberg, Frederik Rask Dalby, Lise Bonne Guldberg, Michael Jørgen Hansen

{"title":"Slurry funnels with frequent discharge and partial pit ventilation reduce ammonia, methane, and odorants emissions in sow housing","authors":"Pablo García, Anders Feilberg, Frederik Rask Dalby, Lise Bonne Guldberg, Michael Jørgen Hansen","doi":"10.1016/j.biosystemseng.2025.104259","DOIUrl":"10.1016/j.biosystemseng.2025.104259","url":null,"abstract":"<div><div>Livestock slurry is an important anthropogenic source of ammonia, methane, and odour. Novel techniques need to replace standard practices to mitigate emissions. This study explores a slurry system based on funnels with frequent slurry discharge and partial pit ventilation in an experimental pig house with farrowing pens for loose sows. In the control section, a flat bottom slurry system was installed and emptied only at the end of the batch. Ammonia and methane concentrations were quantified with cavity ring-down spectroscopy and odorants with proton-transfer-reaction mass spectrometry. Applying 30 % pit ventilation in both sections reduced ammonia emissions by approximately 50 % in the funnel section compared to the control. Without pit ventilation in the control, the ammonia emissions were 25 % lower in the funnel section with 30 % pit ventilation. Methane was 20–80 % lower in the funnel section and the odour activity value was reduced by more than 50 % in all batches compared to the control. Alternative pit ventilation percentages of 20 and 40 % revealed that the pit ventilation should not be higher than 30 % to avoid increased emissions The funnel system with frequent slurry discharge significantly reduces ammonia, methane, and odorants emissions relative to the control system. Furthermore, the inclusion of partial pit ventilation reduces NH<sub>3</sub> concentration above the slats providing a healthier environment for the sow and piglets.</div></div>","PeriodicalId":9173,"journal":{"name":"Biosystems Engineering","volume":"258 ","pages":"Article 104259"},"PeriodicalIF":5.3,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144828017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Mitigation of greenhouse gas and ammonia emissions due to livestock housing management practices: Analysis of the DATAMAN database 减少牲畜舍管理做法造成的温室气体和氨排放：对DATAMAN数据库的分析

IF 5.3 1区农林科学

Biosystems Engineering Pub Date : 2025-08-13 DOI: 10.1016/j.biosystemseng.2025.104260

Vasileios Anestis , Wajid Umar , Federico Dragoni , Tony J. van der Weerden , Mélynda Hassouna , Alasdair Noble , Thomas Bartzanas , Barbara Amon

{"title":"Mitigation of greenhouse gas and ammonia emissions due to livestock housing management practices: Analysis of the DATAMAN database","authors":"Vasileios Anestis , Wajid Umar , Federico Dragoni , Tony J. van der Weerden , Mélynda Hassouna , Alasdair Noble , Thomas Bartzanas , Barbara Amon","doi":"10.1016/j.biosystemseng.2025.104260","DOIUrl":"10.1016/j.biosystemseng.2025.104260","url":null,"abstract":"<div><div>This study analysed management effects on methane (CH<sub>4</sub>), nitrous oxide (N<sub>2</sub>O) and ammonia (NH<sub>3</sub>) emissions from pig and cattle houses, using the global DATAMAN-Housing database. Emission factor (EF) data was grouped by animal sub-category and manure type, and single-variable linear models of EF with housing practice variables (e.g. air scrubber, bedding material, with identified control values) were developed. These variables were examined for statistically significant effects on mean EFs. In closed growing pig housing systems, replacing straw with sawdust-based bedding reduced (p = 0.012) the mean EF<sub>CH4</sub> by 46 %. In deep pit growing pig houses, installing biological air scrubbers at the air outlet decreased the mean EF<sub>NH3</sub> (p = 0.031) by 24 %. Limited N<sub>2</sub>O data showed an increased EF<sub>N2O</sub> by 57 % (p < 0.0001), but careful interpretation is required due to the low number of observations. Frequent slurry removal from the pit below slatted floors using a scraper lowered (p = 0.011) the mean EF<sub>NH3</sub> by 53 %. In cubicle and loose cattle houses the mean EF<sub>NH3</sub> decreased when using woodchips instead of straw bedding and when changing from manure removal via scraper to flushing. The latter effects need cautious interpretation due to small sample sizes and differences in potential NH<sub>3</sub> emission driving factors. While these findings are promising, many practices had limited observations. Further studies are required to better quantify these practices’ mitigation potential for pig and cattle houses, ensuring co-benefits and trade-offs for all gases are captured, with data collated in the DATAMAN database for improved quantification.</div></div>","PeriodicalId":9173,"journal":{"name":"Biosystems Engineering","volume":"258 ","pages":"Article 104260"},"PeriodicalIF":5.3,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144828016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimal temperature setpoint control for a complete greenhouse crop cycle under growth uncertainty 生长不确定性下温室作物全周期最优温度设定值控制

IF 5.3 1区农林科学

Biosystems Engineering Pub Date : 2025-08-13 DOI: 10.1016/j.biosystemseng.2025.104250

Simon van Mourik , Bert van ’t Ooster , Michel Vellekoop

{"title":"Optimal temperature setpoint control for a complete greenhouse crop cycle under growth uncertainty","authors":"Simon van Mourik , Bert van ’t Ooster , Michel Vellekoop","doi":"10.1016/j.biosystemseng.2025.104250","DOIUrl":"10.1016/j.biosystemseng.2025.104250","url":null,"abstract":"<div><div>This paper proposes to plan crop production over a complete growing season, by solving a control problem that optimises expected net revenue under stochastic disturbances. Production specifications with payouts only at harvest time (i.e. a reward only at harvest time) and under precise weight constraints on the harvested crop were considered. A case study was conducted for lettuce production in a greenhouse under Dutch weather conditions. Optimal control policies were calculated for weather measured on three different days, three different values for energy costs, and an uncertainty analysis was carried out under varying harvest weight requirements, state dynamics uncertainty levels, initial crop weight and starting time of the production round. The optimal controller balances daily energy costs and the expected maximum harvest revenues and uses state- and time-dependent feedback to adapt its actions under uncertainty. A control policy that is not based on uncertainty, is shown to perform substantially worse, with 15% less net revenues. A control policy without dynamic feedback even lead to a loss of 19% in net revenues. The sensitivity analysis showed that these performance differences persist over large ranges in uncertainty level, harvest weight constraints, deviations from the optimal starting day, and deviations in initial crop weight. Altogether, the results indicate that dynamic feedback, and uncertainty modelling can substantially improve economic outcomes in greenhouse climate control design.</div></div>","PeriodicalId":9173,"journal":{"name":"Biosystems Engineering","volume":"258 ","pages":"Article 104250"},"PeriodicalIF":5.3,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144828013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improving simulation accuracy of a drip irrigation tooth emitter: Simulation and verification of tooth tip fillet 提高滴灌齿射器仿真精度：齿尖圆角的仿真与验证

IF 5.3 1区农林科学

Biosystems Engineering Pub Date : 2025-08-12 DOI: 10.1016/j.biosystemseng.2025.104257

Xuefeng Qiu , Haitao Wang , Qiankun Leng , Suojun Xu , Jiandong Wang , Hongyi Yang , Xurong Mei

{"title":"Improving simulation accuracy of a drip irrigation tooth emitter: Simulation and verification of tooth tip fillet","authors":"Xuefeng Qiu , Haitao Wang , Qiankun Leng , Suojun Xu , Jiandong Wang , Hongyi Yang , Xurong Mei","doi":"10.1016/j.biosystemseng.2025.104257","DOIUrl":"10.1016/j.biosystemseng.2025.104257","url":null,"abstract":"<div><div>Numerical simulations are a reliable and commonly used research method for optimizing the structure of toothed labyrinth channels. However, simulations often involve a physical model of the sharp angle (SA) that is inconsistent with the actual emitter, which distorts the results to a certain extent. This study investigated two tooth-tip filleting methods (constant and variable angles) with five radii (r0.02–r0.10 mm) and compared them with SA, analysing impacts on hydraulic characteristics. Results showed sharp angles widened flow channels by 22.77–22.85 % versus r0.10 mm fillets, reduced emitter flow rates by 23.66–27.94 % under each pressure gradients, and overestimated energy dissipation by 40.36–43.41 %. Internally, SA increased wake vortex areas at tooth tips, Q-criterion vortex intensity was overestimated by 27.75–45.04 %, while mean flow velocity, turbulent kinetic energy (TKE), and TKE dissipation rates were overestimated by 12.66–14.10 %, 18.84–20.59 %, and 20.52–22.42 %, respectively. TKE and dissipation rate zones were overestimated by 50.51–57.96 % and 37.55–47.84 %. Hence, when the SA physical model was used to optimise the structure of the toothed labyrinth channel, in addition to the deviation from the physical structure of the emitter, there were large deviations in the simulation calculations of the flow rate, energy dissipation, and internal hydraulic characteristics. However, the filleted-tooth tip, which was consistent with the machining accuracy of the emitter, further improved the simulation accuracy. The results provide important reference values for the optimal design of drip irrigation emitters and reducing their processing costs.</div></div>","PeriodicalId":9173,"journal":{"name":"Biosystems Engineering","volume":"258 ","pages":"Article 104257"},"PeriodicalIF":5.3,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144827500","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Industry-scale prediction of video-derived pig body weight using efficient convolutional neural networks and vision transformers 利用高效卷积神经网络和视觉变压器对视频衍生猪体重进行工业规模预测

IF 5.3 1区农林科学

Biosystems Engineering Pub Date : 2025-08-05 DOI: 10.1016/j.biosystemseng.2025.104243

Ye Bi , Yijian Huang , Jianhua Xuan , Gota Morota

{"title":"Industry-scale prediction of video-derived pig body weight using efficient convolutional neural networks and vision transformers","authors":"Ye Bi , Yijian Huang , Jianhua Xuan , Gota Morota","doi":"10.1016/j.biosystemseng.2025.104243","DOIUrl":"10.1016/j.biosystemseng.2025.104243","url":null,"abstract":"<div><div>Accurate pig body weight measurement is critical for pig growth, health, and marketing. Although there is a growing trend towards the use of computer vision approaches for pig body weight prediction, their validation with large-scale data collected in commercial environments is still limited. Therefore, the main objective of this study was to predict pig body weight collected at multiple timepoints from a commercial environment using efficient convolutional neural networks and efficient vision transformers. Top-view videos were collected from over 600 pigs at six time points over three months. Scale-based body weight records were simultaneously recorded by a digital weighing system. An automated video conversion pipeline and fine-tuned YOLOv8 were applied to preprocess the raw depth videos. Two families of lightweight deep neural networks, MobileNet and MobileViT, were initialised with the pre-trained weights from ImageNet and customised to predict pig body weight directly from depth images. Two cross-validation strategies were used: single time point random subsampling and time series forecasting with a sparse design considering limited budget scenarios. In single time point random subsampling, the best prediction mean absolute percentage error for each time point was 4.71%, 3.80%, 3.08%, 5.60%, 3.42%, and 3.77%, respectively. On average, the MobileViT-S model produced the best prediction mean absolute percentage error. In time series forecasting, although a sparse design resulted in some performance loss compared to the full design, the use of ViT models mitigated this degradation. These results suggest that efficient deep learning-based supervised learning models are a promising approach for predicting pig body weight from industry-scale depth video data.</div></div>","PeriodicalId":9173,"journal":{"name":"Biosystems Engineering","volume":"257 ","pages":"Article 104243"},"PeriodicalIF":5.3,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of track ground pressure distribution uniformity on traction under slope 轨道地压分布均匀性对坡下牵引的影响

IF 5.3 1区农林科学

Biosystems Engineering Pub Date : 2025-08-05 DOI: 10.1016/j.biosystemseng.2025.104252

Xiaodong Mu , Zonglin Li , Yuxuan Ji , Zhijie Liu , Zheng Wang , Luojia Duan , Shiying Chen , Xiaoyan Zhu , Zhong Lin , Fuzeng Yang

{"title":"Influence of track ground pressure distribution uniformity on traction under slope","authors":"Xiaodong Mu , Zonglin Li , Yuxuan Ji , Zhijie Liu , Zheng Wang , Luojia Duan , Shiying Chen , Xiaoyan Zhu , Zhong Lin , Fuzeng Yang","doi":"10.1016/j.biosystemseng.2025.104252","DOIUrl":"10.1016/j.biosystemseng.2025.104252","url":null,"abstract":"<div><div>Traction is one of the important parameters for measuring the operation of vehicles. When tracked vehicles are driven on slopes, gravity can cause an uneven distribution of ground pressure on both sides of the tracks, seriously affecting the traction adhesion of the vehicle. The purpose of this study is to study the influence of the uniformity of contact pressure distribution on traction force on track slopes with the intent to change the uniformity of the distribution of contact pressure on track slopes by adjusting the position of the vehicle's barycentre. To quantify the distribution phenomenon of track grounding pressure, a coefficient for predicting the uniformity of ground pressure distribution is proposed. Platform tests are conducted on slopes of 5°, 10°, 15°, and 20°, and the results showed that the higher the slope, the worse the uniformity of ground pressure distribution and traction. After adjusting the vehicle's barycentre, the uniformity of ground pressure distribution was improved. Whenever the uniformity of ground pressure distribution increased by 1 %, the vehicle's traction increased by ∼3 %. On a 20° slope, the barycentre adjustment increased the uniformity of ground pressure distribution increases by 17.6 % and improved traction by 58.5 %. Therefore, barycentre-adjusted tracked vehicles can greatly improve the uniformity of ground pressure distribution, thereby improving slope traction adhesion and safety. The results and patterns of this study have great guiding significance for the design and performance evaluation of tracked vehicles in hilly and mountainous areas in the future.</div></div>","PeriodicalId":9173,"journal":{"name":"Biosystems Engineering","volume":"257 ","pages":"Article 104252"},"PeriodicalIF":5.3,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Accuracy of volume equations in innovative egg-shaped calculations: Using shape functions to enhance compensation coefficients 创新蛋形计算中体积方程的准确性：使用形状函数来增强补偿系数

IF 5.3 1区农林科学

Biosystems Engineering Pub Date : 2025-08-05 DOI: 10.1016/j.biosystemseng.2025.104253

Ching-Wei Cheng , Ko-Jung Huang , Yu-Kai Weng , Ping-Kun Tsai , Chia-Chun Lai

{"title":"Accuracy of volume equations in innovative egg-shaped calculations: Using shape functions to enhance compensation coefficients","authors":"Ching-Wei Cheng , Ko-Jung Huang , Yu-Kai Weng , Ping-Kun Tsai , Chia-Chun Lai","doi":"10.1016/j.biosystemseng.2025.104253","DOIUrl":"10.1016/j.biosystemseng.2025.104253","url":null,"abstract":"<div><div>This study employs a non-traditional approach in the volume equation for eggs, emphasising the introduction of an innovative shape function (<span><math><mrow><mfrac><msub><mi>x</mi><mi>m</mi></msub><mi>a</mi></mfrac></mrow></math></span>) in the design of compensation coefficients. While the volume equation itself is not a novel method, the application of the newly proposed shape function in compensation coefficients, based on easily measurable shape parameters (<span><math><mrow><msub><mi>x</mi><mi>m</mi></msub></mrow></math></span>, <span><math><mrow><msub><mi>b</mi><mi>m</mi></msub></mrow></math></span> and <em>a</em>), significantly reduced calculation errors. Experimental results demonstrated that, in the validation of chicken and duck eggs, the error ranged between 2.43 % and −1.17 %, and 2.65 % to −1.75 %, respectively. This not only enhances the accuracy of volume calculations but also highlights the good performance of this new shape function in improving calculation precision. The introduction of this method has far-reaching academic implications for egg volume calculations and opens new research avenues for the application of shape functions in compensation coefficient design, and offering abundant possibilities for future studies.</div></div>","PeriodicalId":9173,"journal":{"name":"Biosystems Engineering","volume":"257 ","pages":"Article 104253"},"PeriodicalIF":5.3,"publicationDate":"2025-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144771591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0