As a non-destructive detection method, an electronic nose can be used to assess the freshness of meats by collecting and analyzing their odor information. Deep learning automatically extract features uncover potential patterns in data, minimizing influence subjective factors such as selecting artificially. A transfer-learning-based model was proposed for detect chicken breasts this study. First, 3D-printed system is collect data from breast samples stored at 4 °C 1–7 d. Then, three...

Abstract The global distribution and variations of the monthly mesopause temperature are presented during 2002–2019 covering latitudes 83°S to 83°N based on Sounding Atmosphere using Broadband Emission Radiometry (SABER) observations. To investigate long‐term trend solar response temperature, a three‐component harmonic fit is first applied remove seasonal variation from data series. Then multiple linear regression model performed residual temperatures versus constant, trend, activity,...

Inthis paper, global position system high-resolution sounding data from 1998 to 2008 were used statistically analyze the spatiotemporal distribution and determine probability, thickness, intensity of atmospheric ducts at 12 stations in Alaska. In addition, singular value decomposition (SVD) was examine relationship between Arctic vortex ducts. The annual average probability ducts, primarily surface elevation approximately 30% greater than that area index each subarea significantly negatively...

This study compares wind speeds derived from five satellite microwave radiometers with those directly observed by buoy-mounted anemometers and the global analyses produced European Center for Medium-Range Weather Forecasts (ECMWF) model. Buoy comparisons yield speed root mean square errors of 0.82 m/s WindSat, 1.45 SSMIS F16, 1.39 F17, 1.43 AMSR-E, AMSR2. The overall bias each is typically <0.25 when averaged over all selected buoys a given time. are underestimated respect to buoy...

Atmospheric refraction is a special meteorological phenomenon mainly caused by gas molecules and aerosol particles in the atmosphere, which can change propagation direction of electromagnetic waves atmospheric environment. refractive index, an index to measure refraction, important parameter for wave. Given that it difficult obtain 100 meters (m)–3000°m over ocean, this paper proposes improved extreme gradient boosting (XGBoost) algorithm based on comprehensive learning particle swarm...

The properties of the long-term oscillations in middle atmosphere have been investigated using Sounding Atmosphere Broadband Emission Radiometry (SABER) temperature data and Fabry–Perot interferometer (FPI) data. Results for SABER show that semiannual oscillation (SAO) has three amplitude maxima at altitudes 45, 75, 85 km, respectively, shows prominent seasonal asymmetries there. SAOs upper mesosphere (75 km) are out phase with those mesopause (85 tropical regions, which can generate an...

The propagation of Global Positioning System (GPS) signals at low-elevation angles is significantly affected by a surface duct. In this paper, we present an improved algorithm known as NSSAGA, in which simulated annealing (SA) combined with the non-dominated sorting genetic II (NSGA-II). Matched-field processing was used to remotely sense refractivity structure using data ground-based GPS phase delay and loss from multiple antenna heights. performance checked simulation without noise....

The realistic and accurate estimation of hurricane intensity is highly desired in many scientific operational applications. With the advance passive microwave polarimetry, an alternative opportunity for retrieving wind speed hurricanes has become available. A retrieval algorithm speeds above 20 m/s been developed by using 6.8 10.7 GHz vertically horizontally polarized brightness temperatures WindSat. WindSat measurements 15 category 4 5 from 2003 to 2010 corresponding H*wind analysis data...

In order to address with the problem of traditional or improved cuckoo search (CS) algorithm, we propose a dynamic adaptive crossover operator (DACS-CO) algorithm. Normally, parameters CS algorithm are kept constant adapted by empirical equation that may result in decreasing efficiency solve problem, feedback control scheme is adopted search; Rechenberg's 1/5 criterion, combined learning strategy, used evaluate evolution process. addition, there no information exchanges between individuals...

Abstract The accuracy of temperature data from the Constellation Observing System for Meteorology, Ionosphere and Climate (COSMIC) radio occultation Thermosphere, Ionosphere, Mesosphere Energetics, Dynamics/Sounding Atmosphere using Broadband Emission Radiometry (TIMED/SABER) observation over China is analyzed. High-resolution sounding are used to assess these two kinds satellite at corresponding heights, sets compared in height range 15–40 km. Very good agreement between radiosondes COSMIC...

In this paper, we present a new estimation of the atmospheric refractivity profile combining scattering signal (electromagnetic wave propagation loss) and direct (phase delay). The is modeled using four parameters, i.e., gradient (c1, c2) vertical altitude (h1, h2). We apply NSGA-II (Non-dominated Sorting Genetic Algorithm II), multiobjective optimization algorithm, to achieve goals joint inversion in inverting process, compare method with traditional individual methods. anti-noise ability...

The problem of atmospheric duct inversion is usually solved as a single objective optimization problem. Based on ground-based Global Positioning System (GPS) phase delay and propagation loss, this paper develops multi-objective method including the effect source frequency receiving antenna height. diversity convergence solution sets are evaluated for seven evolutionary algorithms with three performance metrics: Hypervolume (HV), Inverted Generational Distance (IGD), averaged Hausdorff...

The traditional method of retrieving atmospheric ducts is to use the special sensor weather balloons or rocket soundings obtain information intelligently, and it very expensive. Today, with development technology, convenient retrieve from Global Navigation Satellite System (GNSS) phase delay propagation loss observation data, then GNSS receiver on ground forms an automatic receiving sensor. This paper proposes a hybrid decomposition-based multi-objective evolutionary algorithm adaptive...

Evaporation duct is a kind of chaotic phenomenon over the ocean. In this paper, new nonlinear prediction algorithm, Darwinian evolutionary algorithm (DEA), introduced to obtain specific formula P(·) phenomenon. Based on natural selection and survival theory, method first selects suitable training set samples, then produces an initial population before going through process selection, reproduction mutation until optimal individual found. Finally, expression for time series obtained, which can...

The extraction of auroral ovals from images acquired by the Ultraviolet Imager is notoriously difficult due to low contrast, inhomogeneity and presence dayglow. In this paper, address these issues, we propose an improved level set segmentation algorithm incorporating shape feature intensity distribution oval into variational framework. term proposed keep annular ring appearance avoid boundary leak imposing a distance constraint on inner outer boundaries. local information tackles difficulty...

Estimating refractivity profiles from radar sea clutter is a complex nonlinear optimization problem. To deal with the ill-posed difficulties, an inversion algorithm, particle swarm Lévy flight (LPSO), was proposed to be applied in (RFC) technique retrieve atmospheric duct this paper. PSO has many advantages solving continuous problems, while its late period it slow convergence speed and low precision. Therefore, we integrate flights into standard algorithm improve precision enhance...

Using the RFC technique to estimate refractivity parameters is a complex nonlinear optimization problem. In this paper, an improved cuckoo search (CS) algorithm proposed deal with To enhance performance of CS algorithm, parameter dynamic adaptive operation and crossover were integrated into standard (DACS-CO). Rechenberg’s 1/5 criteria combined learning factor used control adjusting process. The genetic was utilized guarantee population diversity. new hybrid has better local ability...

This paper develops a new method for the diagnosis and prediction of evaporation duct heights on sea, which has certain reference significance study ducts. Based traditional diagnostic predictive models heights, model is proposed. By determining overall Richardson number Rib, Monin-Obukhov (M-O) length L wind speed characteristic parameter u*, temperature θ* humidity parameters q* are calculated, then height diagnosed. Taking diagnosed as time series, using support vector regression (SVR)...

An idealized model is used to simulate radio occultation bending angles and residual ionospheric errors. The test results of the proposed simulation method agree with those previous studies that use end-to-end tools. Also, a new error by Healy Culverwell (2015) verified in this letter characterizing key parameter, κ. A simple model, κ(a) = - B × (a 20)/60, estimate values κ, where are constants indicate magnitude variation respectively, represents impact height. When modelled κ applied...