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- 2015
- Xanthomonas oryzae
- multispectral and multimodal microscopy
- spectroscopic imaging
- plant cell diseases
- classification
- rice
- Applied Physics
- University of Sciences, Technique and Technology Bamako
- Institut National Polytechnique Felix Houphou?t-Boigny Yamoussoukro
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[IEEE 2018 International Ural Conference on Green Energy (UralCon) - Chelyabinsk, Russia (2018.10.4-2018.10.6)] 2018 International Ural Conference on Green Energy (UralCon) - Simulation Model of Autonomous Solar Power Plant with Dual-Axis Solar Tracker
摘要： The article provides a description of a simulation model of a solar power station with an automated dual-axis solar tracker, which was developed using MATLAB/Simulink. The presented development includes a random weather generator (intensity of solar radiation), automated load redundancy, and also simultaneous use of two types of solar cells such as monocrystalline and polycrystalline. This paper presents the results of modeling, which prove the effectiveness of the application of solar modules with a dual-axis solar tracker in comparison with statically located modules. In addition, on the basis of the conducted analysis of the modeling solar power station work in MATLAB/Simulink optimum operating conditions of a photovoltaic plant have been identified. The developed model will allow for researching the characteristics of a solar power plant and predicting the amount of energy generated by solar panels in a specific place.
关键词： designing a solar tracking-system,modeling dual-axis solar tracker,simulation model of solar power plant,simulation of solar PV model in MATLAB
更新于2025-09-11 14:15:04
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Smart Plant Factory (The Next Generation Indoor Vertical Farms) || The Quality and Quality Shifting of the Night Interruption Light Affect the Morphogenesis and Flowering in Floricultural Plants
摘要： The effects of the quality of night interruption (NI) on the morphogenesis and flowering were investigated in Petunia hybrida Hort. “Easy Wave Pink” (qualitative long-day plant), Pelargonium × hortorum L.H. Bailey “Ringo 2000 Violet” (day-neutral plant), and Dendranthema grandiflorum “gaya yellow” (qualitative short-day plant). Plants were grown in a closed-type plant factory under a light intensity of 180 μmol·m?2·s?1 PPFD (photosynthetic photon flux density) provided by white (W) light-emitting diodes (LEDs) under a condition of either long day (LD, 16 h light/8 h dark), short day (SD, 10 h light/14 h dark), or SD with 4 h NI. NI was provided by 10 ± 3 μmol·m?2·s?1 PPFD.
关键词： Day-neutral plant,Long-day plant,Light quality,Morphogenesis,Flowering control,Short-day plant
更新于2025-09-10 09:29:36
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Experimental Comparison of the Efficiency of Low-Power PWM and MPPT Controllers of a PV/Battery under Moscow’s Climatic Conditions
摘要： The paper presents the results of an experimental study of the efficiency of the integrated controllers of PWM and MPPT PV/batteries, which are part of an autonomous photovoltaic power plant. The dependences of the efficiency on the hourly sums of solar radiation are represented, which can be used to calculate the productivity of autonomous photovoltaic systems with an hourly integration step. The operational features of the controllers during low-level periods of solar radiation are considered.
关键词： photovoltaic,solar power,solar battery,solar charge controllers,solar power plant,photoelectric converter,solar battery controller
更新于2025-09-10 09:29:36
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[IEEE 2018 International Conference on Smart City and Emerging Technology (ICSCET) - Mumbai, India (2018.1.5-2018.1.5)] 2018 International Conference on Smart City and Emerging Technology (ICSCET) - Floating Solar Collector for Hybrid Hydro-Solar Power Plant
摘要： In the current era of energy technology, almost popular branch in engineering which deals about study of conventional and non-conventional source of energy for production of non-conventional source of energy is our motto in this paper and application of floating solar collectors requires hybrid-solar power plant is manly discussed in this paper. The main concept of this paper is to generate the electricity to use of solar energy. Since hydroelectricity is the non –conventional source of energy but with the help of solar p-v panels which is the source of conventional source of energy, we can produce the energy throughout the year. We can utilize renewable source of emery for production of electricity. Solar energy is the rich source of energy for production of energy. Solar energy converted to useful energy indirectly via other energy form. There is some limitation to use solar energy as well as some advantage of use of solar emery.
关键词： Hybrid system,Hybrid hydro Solar power plant,Floating solar collectors,Use of solar energy,Future scope
更新于2025-09-10 09:29:36
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Ensemble Feature Selection for Plant Phenotyping: A Journey From Hyperspectral to Multispectral Imaging
摘要： Hyperspectral imaging is becoming an increasingly popular tool for high-throughput plant phenotyping, because it provides remarkable insights about the health status of plants. Feature selection is a key component in a hyperspectral image analysis, largely because a significant portion of spectral features are redundant and/or irrelevant, depending on the desired application. This paper presents an ensemble feature selection method to identify the most informative spectral features for practical applications in plant phenotyping. The hyperspectral data set contained the images of four wheat lines, each with a control and a salt (NaCl) treatment. To rank spectral features, six feature selection methods were used as the base for the ensemble: correlation-based feature selection, ReliefF, sequential feature selection, support vector machine-recursive feature elimination (SVM-RFE), LASSO logistic regression, and random forest. The best results were achieved by the ensemble of ReliefF, SVM-RFE, and random forest, which drastically reduced the dimension of the hyperspectral data set from 215 to 15 features, while improving the accuracy in classifying the salt-treated vegetation pixels from the control pixels by 8.5%. To transform the hyperspectral data set into a multispectral data set, six wavelengths as the center of broad multispectral bands around the most prominent features were determined by a clustering algorithm. The result of salt tolerance assessment of the four wheat lines using the derived multispectral data set was similar to that of the hyperspectral data set. This demonstrates that the proposed feature selection pipeline can be utilized for determining the most informative features and can be a valuable tool in the development of tailored multispectral cameras.
关键词： hyperspectral imaging,Band selection,multispectral imaging,wheat,ensemble feature selection,salt stress,machine learning,plant phenotyping,classification
更新于2025-09-10 09:29:36
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[IEEE IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Valencia, Spain (2018.7.22-2018.7.27)] IGARSS 2018 - 2018 IEEE International Geoscience and Remote Sensing Symposium - Representative Signature Generation for Plant Detection in Hyperspectral Images
摘要： In this study, the effect of utilizing different type of signatures on plant detection success is evaluated on hyperspectral aerial images. Plant regions are tried to detect using spectral signatures of leaf, stem and tassel belonging to the plant separately and the plant representative signature (PRS) is created by averaging of signatures of selected region on the aerial images. The signatures used for detection are generated from hyperspectral images taken from 10m distance to target plant. The Spectral Angle Mapper (SAM) and Generalized Likelihood Ratio Test (GLRT) algorithms are used for target detection. Performance evaluation is made by Receiver Operating Characteristic (ROC) curves. When the results are evaluated, it is observed that the detection performance with the use of PRS is higher.
关键词： hyperspectral image processing,plant classification,corn detection,spectral library
更新于2025-09-10 09:29:36
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Nigella sativa seed based nanocomposite-MnO2/BC: An antibacterial material for photocatalytic degradation, and adsorptive removal of dye from water
摘要： Antimicrobial Nigella sativa seed-based nanocomposite, MnO2/BC, was synthesized and utilized for water purification through adsorption and photocatalytic degradation. MnO2/BC was prepared by co-precipitation method, and characterized using FT-IR, XRD, SEM, TEM, TGA, and DSC techniques. The composite was investigated for inhibition of bacterial cells growth. FT-IR spectrum indicated the presence of oxygenous groups on the surface; TGA and DSC showed thermal degradation; and XRD, SEM, and TEM investigations indicated amorphous, and porous nature of MnO2/BC having particle size of 190-220 nm. The nanocomposite inhibited the growth of both Gram-positive and Gram-negative bacteria cells in water. The adsorption of Methylene blue (MB) from water was investigated in batch method in terms of amount of MnO2/BC, MB concentration, pH, time, and temperature. 1.0 gL-1 of MnO2/BC removed more than 98% of MB from aqueous solution having concentration of 10 mgL-1 and pH 7.0 at 27°C. The maximum Langmuir adsorption capacity of MnO2/BC was 185.185 mgg-1 at 45°C. The adsorption was an endothermic process which obeyed Freundlich isotherm, and pseudo-second order kinetics. Therefore, the MB binding onto MnO2/BC surface was site-specific partially through weak hydrogen bonding and electrostatic interactions. The photocatalytic activity of MnO2/BC has been investigated by degrading the MB molecules/ions in water under the sunlight and 85% of degradation was achieved during 120 min irradiation. The dye was desorbed at lower pH and regenerated MnO2/BC was used for second cycle of MB adsorption. The results obtained for this study are much better than the previous MB adsorption studies with acid washed Black cumin seeds and MnFe2O4/BC for which the capacities were 73.529 mgg-1 and 10.070 mgg-1 at 27°C, respectively (J. Mol. liq. 2018a, 264, 275-284; J. Clean. Prod. 2018a, 200, 996-1008).
关键词： MnO2/BC,Antibacterial activity,Photocatalytic degradation,Adsorption,Nigella sativa plant seeds,Methylene blue
更新于2025-09-10 09:29:36
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[American Society of Agricultural and Biological Engineers 2017 Spokane, Washington July 16 - July 19, 2017 - ()] 2017 Spokane, Washington July 16 - July 19, 2017 - <i>Phenotyping of Arabidopsis for drought stress response using kinetic chlorophyll fluorescence imaging</i>
摘要： Drought stress is one of the major concerns in global agricultural production. Developing an efficient phenotyping technology can bridge the knowledge gap between the plant phenotype and genotype, which can promote the progress of breeding for drought tolerant accessions and provide economic benefits for the producers and consumers. This research was aimed to investigate the plant phenotyping for drought stress responses of two different genotypes of Arabidopsis using chlorophyll fluorescence imaging. 59 treatment groups (three plants for each group) of each genotype were withholding being watered for 8 days as the drought stress treatment, and the other 59 groups considered as control were regularly watered with 6 ml 1% nutrient solution every day. The kinetic chlorophyll fluorescence images of the drought treatment groups and the control groups were acquired at day 1, 3, 5, 7 and 8 after the drought stress treatment started. The conventional chlorophyll fluorescence parameters and the leaf area index were then extracted from the images. In addition, associated morphological and physiological parameters were also assayed. To construct combinatorial images, the sequential forward selection (SFS) algorithm was used to select the maximum contrast images between two genotypes and the linear discriminant analysis (LDA) was used to build combinatorial images. Finally, combinatorial images were analyzed, indicating combinatorial images are valuable in drought stress studies. Above all, the study showed that AQ and osca1 presented different drought stress responses during the treatment period based on the conventional chlorophyll parameters and combinatorial images.
关键词： drought stress,Arabidopsis,plant phenotyping,combinatorial imaging,Chlorophyll fluorescence imaging
更新于2025-09-10 09:29:36
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Utilization of single-image normalized difference vegetation index (SI-NDVI) for early plant stress detection
摘要： An imaging system was refined to monitor the health of vegetation grown in controlled conditions using spectral reflectance patterns. To measure plant health, the single- image normalized difference vegetation index (SI- NDVI) compares leaf reflectance in visible and near- infrared light spectrums. The SI- NDVI imaging system was characterized to assess plant responses to stress before visual detection during controlled stress assays. Images were analyzed using Fiji image processing software and Microsoft Excel to create qualitative false color images and quantitative graphs to detect plant stress. Stress was detected in Arabidopsis thaliana seedlings within 15 min of salinity application using SI- NDVI analysis, before stress was visible. Stress was also observed during ammonium nitrate treatment of Eruca sativa plants before visual detection. Early detection of plant stress is possible using SI- NDVI imaging, which is both simpler to use and more cost efficient than traditional dual- image NDVI or hyper- spectral imaging.
关键词： vegetation index,early stress detection,plant health monitoring,imaging
更新于2025-09-10 09:29:36
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Operation strategy of a hybrid solar and biomass power plant in the electricity markets
摘要： With the potential of low levelized cost of electricity (LCOE) and high dispatchability, the hybrid solar and biomass power (HSBP) plant will become an increasingly attractive alternative of fossil energy in the future. However, the combination of biomass fuels, uncertain solar energy and thermal energy storage (TES) system makes energy flow in HSBP plant more intricate. This problem poses a significant challenge to HSBP plant operation in the electricity markets especially with uncertain market prices. In this paper, the linear operation model of HSBP plant is developed to describe the intricate energy flow and technical constraints. In order to maximize the revenues of HSBP plant in electricity markets, an optimal operation strategy is proposed by taking into account the daily variation of market prices. The uncertainties of solar irradiation and market prices are modeled with stochastic programming approach, i.e. a set of scenarios. The large number of scenarios is reduced to relieve the computational burden of mixed integer linear programming (MILP) problem. In addition, the conditional value at risk (CVaR) is adopted to consider the risk hedge. The validity of the proposed model is demonstrated by case study results.
关键词： Hybrid solar-biomass power plant,Stochastic programming,Optimal operation strategy,Conditional value at risk
更新于2025-09-10 09:29:36