Abstract Optimization and control of the greenhouse light environment is key to increasing crop yield quality. However, saturation point impacts efficient use light. Therefore, dynamic acquisition that influenced by changes in temperature CO 2 concentration an important challenge for development system. In view this challenge, paper describes a optimization model based on growth predicting cucumber photosynthesis. The photosynthetic rate values different photon flux densities (PPFD),...

Cherry-red tobacco has aroused significant interest in both the academic and industrial fields due to its unique aroma style. In order analyze characteristics of intrinsic substance basis, compounds were analyzed by gas chromatography-mass spectrometry (GC-MS), verified sensory evaluation, a correlation analysis was further conducted. The evaluation suggested that significantly richer aroma, containing total 11 aromas, among which nutty, bean, herbal, spicy characteristic aromas. indicated...

Discoloration of red peppers, such as fading and color desaturation, can occur during harvesting, drying storage. In this study, liquid chromatography-mass spectrometry (LC-MS) was used to identify quantify carotenoids. Metabolomics analysis based on ultra-high performance chromatography coupled with a quadrupole extractive orbitrap mass spectrometery (UHPLC-QE Orbitrap/MS) performed determine the metabolites present in discolored peppers normal peppers. This approach showed that carotenoid...

Abstract Pumpkin seeds are nutritious and have some medicinal value. However, the mold sprouting produced during storage of pumpkin seeds. Food safety quality problems may be caused if they not removed in time for processing. The traditional testing methods cumbersome to operate, complex, destructive sample preparation. Therefore, terahertz time‐domain spectroscopy (THz‐TDS) technology was proposed achieve detection internal Firstly, samples different qualities were crafted, moldy 3 days, 6...

Cumin (Cuminum cyminum L. cv.′Xin Ziran 1′), classified within an agricultural crop, necessitates uprooting as a critical harvesting process. In this paper, we tried to study the force dynamics behind direct cumin by developing mechanical models for field and taproot–soil friction. A model friction between taproot sandy loam soil were built. The coefficient of static was determined using laboratory experiments. Pull-out, tensile force, experiments conducted validate model. physical...

ABSTRACT Nondestructive quantitative analysis of fruit damage can not only provide technical support for quality testing, but also the theoretical basis improvement packaging and transportation conditions. However, models prediction are susceptible to influence by own factors (size). Therefore, in order improve accuracy damage, one‐dimensional convolutional neural network (1D‐CNN) combined with mass parameter method was proposed. The study results show that performances 1D‐CNN improved...

Soybean plants cultivated using mulched drip irrigation planting technology have the following characteristics during harvest period: green stems and leaves, a high straw/grain ratio. Moreover, threshing device of soybean combine harvester is difficult to adapt to, resulting in an increase accumulation unevenness threshed mixture. This leads impurity content loss rate. We conducted single-factor experiment on self-developed longitudinal/axial-flow separation test bench, employing drum speed,...

Abstract Impact damage is one of the key factors affecting quality honey peaches. Quantitative study impact great significance for sorting postharvest In order to realize quantitative prediction peaches, peaches was quantitatively studied based on fusion color characteristics with reflection spectra (R), absorbance (A), and Kubelka‐Munk (K‐M). The mechanical parameters during collision were obtained using a single pendulum device. Reflectance damaged by hyperspectral imaging system. R...

Abstract To reduce the number of bruised mangoes at source, it is important to determine different storage times after mild bruise. In order address this issue, a hyperspectral imaging combined with deep learning model was proposed. First, average spectrum sample area extracted as spectral features, and then, six eigenvalues most representative PC1 image were calculated texture features based on gray level co‐occurrence matrix. find optimal discriminative model, random forest (RF), partial...

The quantitative description of the impact damage yellow peaches is an essential basis for evaluating their quality and guiding postharvest handling. In this study, combined hyperspectral technology mechanical parameters method were used to quantitatively investigate peaches. Firstly, parameters, which are damaged area, absorbed energy, maximum contact force, stress peaches, obtained by device. statistical regression models between area established, results showed that energy force optimal...

This study aims at the problems of high labor intensity, cost and loss rate mechanical picking seeds, low mechanization level difficulty to guarantee quality plates in process edible sunflower. Based on principle manual plate taking, a taking control system for sunflower harvesting table was designed. The analyzed. According actual operation requirements, overall scheme is determined, strategy imitating artificial low-loss To reduce grain improve accuracy movement speed displacement key...

Abstract Edamame is a nutritious and economically valuable soybean. The moisture content an important indicator of the quality edamame. traditional methods in detection edamame have disadvantage large errors. In this research, fusion transmittance reflectance spectra hyperspectral imaging combined with chemometrics was proposed to predict Also, effect different preprocessing on predictive performance analyzed. Single spectra, primary intermediate were established as prediction models for...

In order to solve the problems of bottom pod leakage and soil removal by header, a soybean header profiling system was designed in this paper. The cutter height off-ground detection device installed on both sides distance from ground represented angle sensor turning when wheel met rolling ground. hydraulic electromagnetic reversing valve so that could automatically control lifting unilateral power solenoid 0.15 s, changed 10 mm. off set 80 mm, adjustment range 45–125 test results showed...

Existing cleaning devices for edible sunflower have a low efficiency, high loss rate, and impurity rate; therefore, wind-sieve-type device harvesting was designed. According to the characteristics of dislodged objects, vibrating screen designed, objects in were used mechanical analysis force conditions determine displacement different by action airflow. Using FLUENT-DEM gas–solid coupling simulation technology, velocity flow field, vector, trajectory inside analyzed, law motion applied...

Anthracnose of Camellia oleifera is a very destructive disease that commonly occurs in the industry, which severely restricts development industry. In early stage suffering from anthracnose, only diseased parts tree need to be repaired time. With aggravation disease, branches eradicated, and plants should cut down At present, aiming at problems complex experiments low accuracy detecting degree anthracnose oleifera, method proposed detect leaves by using terahertz spectroscopy (THz) combined...

Abstract In this paper, the combined terahertz time-domain spectroscopy (THz-TDS) and chemometrics method is proposed to identify four different parts of Panax notoginseng rapidly nondestructively. The research objects taproot, scissor, rib, hairy root P. are taken. refractive index, absorption coefficient, time-domain, frequency-domain spectra samples analyzed. It found that significantly different, so coefficient selected establish models. Firstly, baseline correction, multiple scattering...