The quality components in postharvest tea leaves determine their characteristics and processing suitability. Currently, chemical analysis is widely used to these indicators. However, this method time-consuming laborious. In study, we developed a NIR-based analytical tool on smartphone for situ rapid detection of indicators multiple varieties harvesting standards. the miniature NIR spectrometer are data acquisition transfer phone via Bluetooth. Partial least squares (PLS) modeling coupled...

Abstract Periodic inspections are required for the safe operation of large pressure vessels such as spherical tanks. Inspection robots have been applied in due to their low cost and high efficiency. This paper presents a robotic system inspection tanks, which can identify track weld lines on shortest running route. Two‐dimensional (2D) maps were prepared robot path planning basis actual distribution lines. In 2D maps, indispensable repetitive added form an Eulerian circuit that traversed all...

In this paper, information entropy and ensemble learning based signal recognition theory algorithms have been proposed. We extracted 16 kinds of features out 9 types modulated signals. The used are numerous, including Rényi energy on S Transform Generalized Transform. three feature selection algorithms, sequence forward (SFS), floating (SFFS) RELIEF-F to select the optimal subset from features. use five classifiers, k-nearest neighbor (KNN), support vector machine (SVM), Adaboost, Gradient...

Abstract The evaluation of Chinese dianhong black tea (CDBT) grades was an important indicator to ensure its quality. A handheld spectroscopy system combined with chemometrics utilized assess CDBT from eight grades. Both variables selection methods, namely genetic algorithm (GA) and successive projections (SPA), were employed acquire the feature each sample spectrum. partial least‐squares discriminant analysis (PLS‐DA) support vector machine (SVM) algorithms applied for establishment grading...

A compact low-temperature and atmospheric-pressure air plasma jet source is developed for the inactivation of oral bacteria. Electrical optical measurements are carried out to understand fundamental characteristics custom-built system. The adjustable operating parameters optimized regulate length plume control generation reactive species. Results show that temperature around 40–45 °C during 5 min plasma-on, without inducing any thermal effects on bacterial cells. Importantly, safety device...

High-voltage pulse power supplies are key input devices for the study and application of discharge plasma. A high-voltage current supply (HV-PCPS) with an energy storage transformer based on flyback topology can output microsecond pulsewidths high-power, ultrahigh voltage, high reliability, which suitable most dielectric barrier (DBD) plasma applications. However, during process DBD driven by HV-PCPS transformer, voltage waveform quality is poor, making it not stable long-term operation....

The construction of power infrastructure not only involves complex engineering techniques but also faces severe safety challenges. This paper proposes a multi-dimensional information integration and intelligent analysis framework aimed at the field safety, designed to achieve comprehensive real-time convergence from site by synthesizing multi-source heterogeneous data. By incorporating BAGAT model graph attention networks, is capable intelligently analyzing conditions accurately identifying...

Nanosecond pulse power has many driving advantages in the dielectric barrier discharge (DBD) application field, including better effect, higher efficiency, and lower electrode temperature. A high-voltage voltage supply (HV-PVPS) with a multi-turn ratio linear transformer (PT) based on Marx circuit PT topologies are suitable for most DBD plasma applications fewer expansion modules, cost, smaller volume, reliability comparing all-solid-state nanosecond supply. However, during process of driven...

Pulsed power technology has found widespread application in environmental governance, biomedicine, food processing, and other fields. This study proposes a pulse generator using forward topology magnetic superposition to get high-voltage outputs. design could adjust the width relatively larger range by optimizing coil structure turns. The isolated supply trigger signal are not needed. RCD (Resistor–Capacitor–Diode) third winding used reset remanence. will take over resetting process when...

ABSTRACT A portable Ar plasma jet (size: 347 × 300 145 mm, weight: 6 kg including the gas bottle) powered by a battery for direct human treatment is developed, and discharge characteristics are investigated with equivalent circuit model in this study. The root‐mean‐square value specific single pulse energy of current calculated as combination to estimate contact safety from perspectives average effects instantaneous effects. built at end figures out essential parameter, plume resistance,...

Complexes of ethyl butyrate and hexanal encapsulated by β-cyclodextrin (β-CD) γ-cyclodextrin (γ-CD) were prepared coprecipitation, gas chromatography was used to quantity the flavour compounds in complexes. The butyrate-γ-CD complex had highest inclusion ratio (12.20%) followed butyrate-β-CD, hexanal-β-CD hexanal-γ-CD complexes (11.29, 4.41 3.33%, respectively). Release experiments performed under different relative humidities (RH 93, 75 52%) temperatures (4 25 °C). release behaviours...

The quality inspection of potato seed tubers is pivotal for their effective segregation and a critical step in the cultivation process potatoes. Given dearth research on intelligent tuber-cutting machinery China, particularly concerning identification bud eyes defect detection, this study has developed multi-target recognition approach utilizing deep learning techniques. By refining YOLOv5s algorithm, novel, lightweight model termed DCS-YOLOv5s been introduced simultaneous tuber buds...

Abstract BACKGROUND Six corn starch inclusion complexes were synthesized using small nonpolar or weak polar aroma compounds (heptanolide, carvone and menthone) (linalool, heptanol menthol). The objectives of this study to (a) investigate the ability form with these (b) characterize structure complexes. RESULTS resulting ratios 75.6, 36.9, 43.8, 91.9, 67.2 54.7% for heptanolide, carvone, menthone, linalool, menthol respectively. had laminated structures a certain amount holes blocky...

The power conditioning unit system is a critical part in spacecraft and responsible for converting the solar panel energy into stable bus voltage. This requires high dynamic characteristic array simulator (SAS) testing purposes. Space simulators (SSASs) used space systems generally use linear topology because of its fast performance good simulation accuracy. However, commercially available SASs are not sufficiently simulating actual output and, therefore unreliable terrestrial testing. In...

Raspberry, the fruit of Rubus Chingji Hu, is a widely distributed economic staple food in China. It has long been used as traditional medicine mainland China to treat kidney enuresis, nocturnal emission and premature ejaculation clinic. In this paper, six known compounds (1 - 6) were purified from fruits chingji. Their structures elucidated (16α)-16,17-dihydroxy-ent-kauran-2-one17-O-β-D-glucopyranoside (1), (16R) -16,17-dihydroxy-ent-kaurane-2-one (2), 3,3'-di-O-methylellagic acid...