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1. Improved premixing in-line injection system for variable-rate orchard sprayers with Arduino platform
- Author:
- Zhu, Heping, et al. ; Zhang, Zhihong; Guler, Huseyin; Shen, Yue; Show all 4 Authors
- Source:
- Computers and electronics in agriculture 2019 v.162 pp. 389-396
- ISSN:
- 0168-1699
- Subject:
- fluorescence; mixing; nozzles; oils; orchards; pesticides; sprayers; sucrose; tap water; turpentine; viscosity
- Abstract:
- ... To reduce the tank mixture leftover problem associated with variable-rate orchard sprayers, an experimental automatic premixing in-line injection system was developed with Arduino platform. This system primarily consisted of a precision fluid metering pump, a water pump, a static mixer, a premixing tank and a buffer tank. The required amounts of water and chemical concentrates were accurately pump ...
- Handle:
- 10113/6379491
- DOI:
- 10.1016/j.compag.2019.04.023
- https://dx.doi.org/10.1016/j.compag.2019.04.023
- Author:
- Zhu, Heping, et al. ; Hong, Se-Woon; Zhao, Lingying; Show all 3 Authors
- Source:
- Computers and electronics in agriculture 2018 v.155 pp. 58-68
- ISSN:
- 0168-1699
- Subject:
- air-assisted sprayers; computer software; databases; droplets; farmers; fluid mechanics; orchards; pesticide application; pesticides; risk; risk reduction; spray drift; weather
- Abstract:
- ... The challenges of ground pesticide applications arise from the increased concerns on potential risks of spray drift to the environment. This paper presents the development of a software application for estimation of spray efficiency and drift from pesticide applications using orchard air-assisted sprayers. The computational fluid dynamics (CFD) simulations provide solutions to the fate and transpo ...
- Handle:
- 10113/6254362
- DOI:
- 10.1016/j.compag.2018.09.031
- https://dx.doi.org/10.1016/j.compag.2018.09.031
- Author:
- Zhu, Heping, et al. ; Hong, Se-Woon; Zhao, Lingying; Show all 3 Authors
- Source:
- Computers and electronics in agriculture 2018 v.149 pp. 121-132
- ISSN:
- 0168-1699
- Subject:
- air; air flow; air-assisted sprayers; canopy; droplets; field experimentation; geometry; industry; models; pesticide application; pesticides; pollution; porous media; prediction; specialty crops; spray drift; trees
- Abstract:
- ... Effective pesticide application is not only essential for specialty crop industries but also very important for addressing increasing concerns about environmental contamination caused by pesticide spray drift. Numerical analysis using computational fluid dynamics (CFD) can contribute to better understanding of the transport of spray droplets carried by strong air jets from sprayers. In this resear ...
- Handle:
- 10113/5761389
- DOI:
- 10.1016/j.compag.2017.07.011
- https://dx.doi.org/10.1016/j.compag.2017.07.011
- Author:
- Zhu, Heping, et al. ; Hong, Se-Woon; Zhao, Lingying; Show all 3 Authors
- Source:
- Atmospheric environment 2018 v.175 pp. 109-119
- ISSN:
- 1352-2310
- Subject:
- air-assisted sprayers; apples; atmospheric chemistry; canopy; developmental stages; droplets; fluid mechanics; leaves; model validation; orchards; pesticides; simulation models; spray coverage; spray deposition; spraying; trees; wastes; wind speed
- Abstract:
- ... The ultimate goal of a pesticide spraying system is to provide adequate coverage on intended canopies with a minimum amount of spray materials and off-target waste. Better spray coverage requires an understanding of the fate and transport of spray droplets carried by turbulent airflows in orchards. In this study, an integrated computational fluid dynamics (CFD) model was developed to predict displ ...
- Handle:
- 10113/5912818
- DOI:
- 10.1016/j.atmosenv.2017.12.001
- CHORUS:
- 10.1016/j.atmosenv.2017.12.001
- https://dx.doi.org/10.1016/j.atmosenv.2017.12.001
- Author:
- Zhu, Heping, et al. ; Yan, Tingting; Sun, Li; Wang, Xiaochan; Ling, Peter; Show all 5 Authors
- Source:
- Computers and electronics in agriculture 2018 v.152 pp. 363-374
- ISSN:
- 0168-1699
- Subject:
- algorithms; cardboard; color; data collection; greenhouses; texture
- Abstract:
- ... Precise measurement of plant dimensions can provide essential information for variable-rate spray application technologies to discharge the amounts of chemicals actually needed by the plants. The accuracy of a 270° radial laser scanning sensor combined with a specially-designed plant surface mapping algorithm was evaluated in detection of complex-shaped object surfaces and sizes. Data acquisition ...
- Handle:
- 10113/6101615
- DOI:
- 10.1016/j.compag.2018.07.030
- CHORUS:
- 10.1016/j.compag.2018.07.030
- https://dx.doi.org/10.1016/j.compag.2018.07.030
- Author:
- Zhu, Heping, et al. ; Yeary, Whitney; Fulcher, Amy; Klingeman, William; Grant, Jerome; Show all 5 Authors
- Source:
- Journal of environmental horticulture 2018 v.36 no.1 pp. 21-29
- ISSN:
- 0738-2898
- Subject:
- Chrysoperla rufilabris; Hippodamia convergens; beneficial insects; biological control; canopy; carbaryl; chemical control; foliar spraying; insect control; insect pests; insecticides; natural enemies; nontarget organisms; nursery crops; ornamental woody plants; pesticide application; plant architecture; spray coverage
- Abstract:
- ... Ornamental plant producers often rely on chemical control to manage insect pests. However, cultural practices, such as pruning, can influence plant architecture which may, in turn, affect pesticide penetration. Spray penetration was studied to determine the effect of canopy density on beneficial insect survival following insecticide application and to better understand the implications of canopy d ...
- Handle:
- 10113/6471018
- DOI:
- 10.24266/0738-2898-36.1.21
- https://dx.doi.org/10.24266/0738-2898-36.1.21
- Author:
- Zhu, Heping, et al. ; Liu, Hui; Show all 2 Author
- Source:
- Transactions of the ASABE 2016 v.59 no.5 pp. 1181-1192
- ISSN:
- 2151-0032
- Subject:
- accuracy; algorithms; cameras; canopy; computers; cylinders; data collection; detection; equipment performance; image analysis; lasers; ornamental trees; sensors (equipment); sprayers
- Abstract:
- ... Sensors that can accurately measure canopy structures are prerequisites for development of advanced variable-rate sprayers. A 270° radial range laser sensor was evaluated for its accuracy to measure dimensions of target surfaces with complex shapes and sizes. An algorithm for data acquisition and 3-dimensional canopy image construction were designed and processed with an embedded computer. Test ta ...
- Handle:
- 10113/5801825
- DOI:
- 10.13031/trans.59.11760
- http://dx.doi.org/10.13031/trans.59.11760
- Author:
- Zhu, Heping, et al. ; Wallhead, Matthew; Broders, Kirk; Show all 3 Authors
- Source:
- Agricultural sciences 2017 v.8 no.12 pp. 1358-1371
- ISSN:
- 2156-8553
- Subject:
- Internet; Malus domestica; Venturia inaequalis; apples; crop production; decision support systems; disease control; fruit growing; fungicides; health status; hyperspectral imagery; leaves; models; pesticide application; plant health; spectroradiometers; trees; vegetation index; Northeastern United States
- Abstract:
- ... Use of hyperspectral spectroradiometers allows for information on different light bands to be captured, allowing for much easier identification of plant health status. Apple scab, caused by the ascomycete Venturia inaequalis, is globally the most important disease in the production of apples. RIMpro is a web-based decision support system for orchardists that has the capacity to improve optimal fun ...
- Handle:
- 10113/6471420
- DOI:
- 10.4236/as.017.812098
- https://dx.doi.org/10.4236/as.017.812098
- Author:
- Zhu, Heping, et al. ; Xiong, Mingteng; Gao, Zhan; Liang, Xiao; Cai, Pengfei; Pan, Yuanjiang; Show all 6 Authors
- Source:
- Chemical communications 2018 v.54 no.69 pp. 9679-9682
- ISSN:
- 1364-548X
- Subject:
- aromatization; cyclohexanones; dimethyl sulfoxide; oxidants; oxygen
- Abstract:
- ... A novel I₂-catalyzed cross-dehydrogenative aromatization of cyclohexanones and anilines to synthesize N,N′-diaryl-o-phenylenediamines has been unprecedentedly developed with dimethyl sulfoxide and oxygen employed as mild terminal oxidants. To prove the rationality of the two separate dehydration steps of the proposed mechanism, a resulting I₂-catalyzed cross-dehydrogenative aromatization of cycloh ...
- DOI:
- 10.1039/c8cc05320k
- http://dx.doi.org/10.1039/c8cc05320k
- Author:
- Zhu, Heping, et al. ; Jia, Weidong; Show all 2 Author
- Source:
- Transactions of the ASABE 2015 v.58 no.4 pp. 1009-1016
- ISSN:
- 2151-0032
- Subject:
- Glycine max; droplet studies; droplets; generators (equipment); leaves; soybeans; spray coverage; spraying; video cameras
- Abstract:
- ... Soybeans are often sprayed to prevent significant yield loss from damage by insect pests and plant diseases. Understanding interactions of spray droplet reactions on soybean plant surfaces can lead to development of improved application strategies to enhance efficacy of pesticides. In this research, dynamics of impact and spread of water droplets of 185 to 693 µm at 1.85 to 6.4 m s-1 impact speeds ...
- Handle:
- 10113/61831
- DOI:
- 10.13031/trans.58.11147
- http://dx.doi.org/10.13031/trans.58.11147
- Author:
- Zhu, Heping, et al. ; Wallhead, Matthew; Sulik, John; Stump, William; Show all 4 Authors
- Source:
- Plant health progress 2017 v.18 no.2 pp. 95-96
- ISSN:
- 1535-1025
- Subject:
- altitude; data collection; decision making; farmers; health status; image analysis; multispectral imagery; plant health; professionals; unmanned aerial vehicles; vegetation index
- Abstract:
- ... Advances in technologies associated with unmanned aerial vehicles (UAVs) have allowed researchers, farmers and agribusinesses to incorporate UAVs coupled with imaging systems into data collection and decision making. Multispectral imagery allows for a quantitative assessment of biophysical indicators or plant health status. What is needed now is a standardized workflow for the quantitative assessm ...
- DOI:
- 10.1094/PHP-04-17-0025-PS
- https://dx.doi.org/10.1094/PHP-04-17-0025-PS
- Author:
- Zhu, Heping, et al. ; Ru, Yu; Zhao, Lingying; Hadlocon, Lara Jane S.; Ramdon, Sanjay K.; Show all 5 Authors
- Source:
- Environmental technology 2017 v.38 no.1 pp. 23-33
- ISSN:
- 1479-487X
- Subject:
- air; air pollution; animal production; environmental technology; human health; models; particulate emissions; particulates; pollutants; poultry
- Abstract:
- ... Particulate matter (PM) is a major air pollutant from animal production with significant impacts on human health and the environment. Abatement of PM emissions is imperative and effective PM control technologies are strongly needed. In this work, an electrostatic spray wet scrubber (ESWS) technology designed for removal of PM (PM ₁₀ and PM ₂.₅) emissions from poultry facilities was evaluated under ...
- DOI:
- 10.1080/09593330.2016.1184319
- http://dx.doi.org/10.1080/09593330.2016.1184319
- Author:
- Zhu, Heping, et al. ; Lin, Huan; Zhou, Hongping; Xu, Linyun; Huang, Huanhua; Show all 5 Authors
- Source:
- Biosystems engineering 2016 v.143 pp. 42-49
- ISSN:
- 1537-5110
- Subject:
- Eucalyptus tereticornis; Eucalyptus urophylla; air temperature; cypermethrin; droplets; leaves; pesticidal properties; phosphates; relative humidity; surfactants; wettability
- Abstract:
- ... The area wetted by 500-μm diameter droplets of pesticide and deionised water placed at different positions on Eucalyptus urophylla × E. grandis (E.u × E.g) and Eucalyptus tereticornis (E.t) leaves was determined at an air temperature of 30 °C and a relative humidity of 60%. Dimethyl dichlorovinyl phosphate (DDVP), and efficient cypermethrin (EC) were diluted 1000 times in deionised water. Solution ...
- DOI:
- 10.1016/j.biosystemseng.2016.01.003
- https://dx.doi.org/10.1016/j.biosystemseng.2016.01.003
- Author:
- Zhu, Heping, et al. ; Dong, Xiang; Yang, Xuejun; Show all 3 Authors
- Source:
- Pest management science 2015 v.71 no.2 pp. 302-308
- ISSN:
- 1526-498X
- Subject:
- Dracaena fragrans; Euphorbia pulcherrima; Zea mays; biological control; droplets; hydrophilicity; hydrophobicity; leaves; mechanics; nonionic surfactants; pesticides; wastes
- Abstract:
- ... BACKGROUND: Elucidation of droplet dynamic impact and deposit formation on leaf surfaces would assist in modifying application strategies potentially to improve biological control efficiency and minimize pesticide waste. RESULTS: The mechanics of the three‐dimensional droplet impact and formation process on hydrophilic and hydrophobic leaf surfaces was investigated with a system that independently ...
- Handle:
- 10113/61404
- DOI:
- 10.1002/ps.3806
- CHORUS:
- 10.1002/ps.3806
- http://dx.doi.org/10.1002/ps.3806
- Author:
- Zhu, Heping, et al. ; Rosetta, Robin; Reding, Michael E.; Zondag, Randall H.; Ranger, Christopher M.; Fulcher, Amy; Derksen, Richard C.; Ozkan, H. Erdal; Krause, Charles R.; Canas, Luis; Show all 10 Authors
- Source:
- Transactions of the ASABE 2017 v.60 no.2 pp. 337-345
- ISSN:
- 2151-0032
- Subject:
- Aphis spiraecola; Caliroa cerasi; Dasineura; Gleditsia triacanthos; Malus; Prunus avium; air-assisted sprayers; application rate; business enterprises; canopy; cherries; commercial horticulture; economic feasibility; equipment performance; insect control; lasers; leaves; nursery crops; ornamental plants; pesticides; profitability; sawflies; spray volume; trees; Ohio; Oregon
- Abstract:
- ... Conducting on-farm evaluations of pest control and economic feasibility is a necessary procedure to assure successful adoption of new spray technologies by commercial horticulture enterprises. A newly developed laser-guided air-assisted variable-rate sprayer was tested for control of spirea aphids (Aphis spiraecola), pod gall midges (Dasineura gleditchiae), and pear sawflies (Caliroa cerasi) on cr ...
- Handle:
- 10113/5801822
- DOI:
- 10.13031/trans.12020
- http://dx.doi.org/10.13031/trans.12020
- Author:
- Zhu, Heping, et al. ; Fulcher, Amy; Cochran, Diana; Rosetta, Robin; Zondag, Randall; Show all 5 Authors
- Source:
- Acta horticulturae 2014 no.1055 pp. 447-451
- ISSN:
- 0567-7572
- Subject:
- Agricultural Research Service; active ingredients; air pollution; air-assisted sprayers; canopy; controllers; ecosystems; environmental quality; fruit trees; humans; integrated pest management; markets; mixing; mortality; nursery crops; occupational health and safety; ornamental plants; pesticide application; pesticides; pests; plant architecture; plant characteristics; plant residues; risk; solenoids; tractors; trade; water footprint; Georgia; Ohio
- Abstract:
- ... Pests pose a substantial threat to the sale of nursery crops (LeBude et al., 2012) and increase the cost of producing ornamental crops. For example, losses due to plant disease in Georgia nurseries were estimated at $43.4 million in 2007 (Martinez, 2008). Application of pesticides, as part of an integrated pest management (IPM) program, can serve an important role in decreasing plant mortality, ma ...
17. Semi-mechanistic modelling of ammonia absorption in an acid spray wet scrubber based on mass balance
- Author:
- Zhu, Heping, et al. ; Hadlocon, Lara Jane S.; Zhao, Lingying; Wyslouzil, Barbara E.; Show all 4 Authors
- Source:
- Biosystems engineering 2015 v.136 pp. 14-24
- ISSN:
- 1537-5110
- Subject:
- absorption; air; ammonia; animals; correlation; mass transfer; mechanistic models; model validation; prediction; scrubbers; sprayers; sulfuric acid
- Abstract:
- ... A model to describe reactive absorption of ammonia (NH3) in an acid spray scrubber was developed as a function of the combined overall mass transfer coefficient Kyav. An experimental study of NH3 absorption using 1% dilute sulphuric acid was carried out under different operating conditions. An empirical correlation for Kyav with respect to droplet Sauter mean diameter, liquid flow rate, and inlet ...
- Handle:
- 10113/61864
- DOI:
- 10.1016/j.biosystemseng.2015.05.002
- https://dx.doi.org/10.1016/j.biosystemseng.2015.05.002
- Author:
- Zhu, Heping, et al. ; Hadlocon, Lara Jane S.; Soboyejo, Alfred B.O.; Zhao, Lingying; Show all 4 Authors
- Source:
- Biosystems engineering 2015 v.132 pp. 88-95
- ISSN:
- 1537-5110
- Subject:
- absorption; accuracy; air; ammonia; animal housing; decontamination; diameter; droplets; emissions; equipment performance; flow; prediction; pressure; regression analysis; scrubbers; statistical models
- Abstract:
- ... The use of acid spray wet scrubbers for recovering ammonia (NH3) emissions is promising due to its high NH3 removal efficiency, simplicity in design, and minimal pressure drop contribution on fans. An experimental study was conducted to evaluate the performance of a lab-optimised acid spray scrubber using simple modelling tools. Important parameters that significantly affect scrubber efficiency we ...
- Handle:
- 10113/61388
- DOI:
- 10.1016/j.biosystemseng.2015.02.003
- https://dx.doi.org/10.1016/j.biosystemseng.2015.02.003
- Author:
- Zhu, Heping, et al. ; Thistle, Harold W.; Ranger, Christopher M.; Zhou, Hongping; Strom, Brian L.; Show all 5 Authors
- Source:
- Biosystems engineering 2015 v.129 pp. 277-287
- ISSN:
- 1537-5110
- Subject:
- Sirex; agriculture; air; ambient temperature; dispensers; exposure duration; forestry; insects; longevity; measurement; monitoring; pest management; prediction; relative humidity; semiochemicals; terpinolene; weight loss
- Abstract:
- ... Insect semiochemical dispensers are commonly deployed under variable environmental conditions over a specified period. Predictions of their longevity are hampered by a lack of methods to accurately monitor and predict how primary variables affect semiochemical release rate. A system was constructed to precisely determine semiochemical release rates under environmentally-controlled conditions. Thre ...
- Handle:
- 10113/61295
- DOI:
- 10.1016/j.biosystemseng.2014.11.003
- https://dx.doi.org/10.1016/j.biosystemseng.2014.11.003
- Author:
- Zhu, Heping, et al. ; Salyani, Masoud; Sweeb, Roy D.; Pai, Naresh; Show all 4 Authors
- Source:
- CIGR ejournal 2013 v.15 no.2 pp. 101
- ISSN:
- 1682-1130
- Subject:
- Citrus; droplets; image analysis; nozzles; paper; pesticide application; spatial distribution; spray coverage; spray deposition; spray volume; systems analysis
- Abstract:
- ... Spatial distributions of spray droplets discharged from an airblast sprayer, were sampled on pairs of absorbent paper (AP) and water-sensitive paper (WSP) targets at several distances from the sprayer. Spray solutions, containing a fluorescent tracer, were discharged from two size nozzles to achieve low and high volume rates commonly used in citrus applications. Spray deposits on AP targets were m ...
- Handle:
- 10113/58501
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