This article gives a brief overview of the major portable techniques: those based on optical spectroscopy techniques, including near-infrared (NIR), mid-infrared (mid-IR), and Raman spectroscopy; mass spectrometry (MS) systems, high-pressure MS (HPMS), gas chromatography–MS (GC–MS), ion mobility (IMS); elemental such as X-ray fluorescence (XRF) laser-induced breakdown (LIBS); emerging miniaturi...

Tomato (Solanum lycopersicum) quality traits such as juice soluble solid content (Brix), juice pH, color parameters (Hue and Chroma), firmness and water content, are critical factors for fruit quality assessment. The need for screening very large numbers of fruit has led to the development of a high-throughput method using visible-near infrared (VIS-NIR) spectrometry. We are reporting here a se...

Near-infrared (NIR) spectroscopy is a widely used technique for determining the composition of textile fibers. This paper analyzes possibility using low-cost portable NIR sensors based on InGaAs PIN photodiode array detectors to acquire spectra samples. The are then processed by applying sequential application multivariate statistical methods (principal component analysis, canonical variate and...

• Low-cost non-destructive measurement of apple hardness by portable NIRS. Robust and reliable models were developed PLS, MLR ANN. Models based on the ANN had highest prediction performance. Seven featured wavelengths selected to form a compact model. A close-formed equation for online monitoring was developed. Portable near-infrared spectrometer in spectral range 900–1700 nm evaluated first ti...

This study develops Near-Infrared Spectroscopy (NIRS) and Mode-Cloning (MC) for the rapid assessment of nutritional quality bamboo leaves, primary diet giant pandas (Ailuropoda melanoleuca) red (Ailurus fulgens). To test NIR-MC approach, we evaluated three species (Phyllostachys bissetii, Phyllostachys rubromarginata, aureosulcata). incorporated a Slope Bias Correction (SBC) transform to crude ...

Recent findings of archaeological research in the Vathy gulf area, Astypalaia Island, indicate its continuous habitation since prehistoric times, most importantly transitional period from Final Neolithic to Early Bronze Age (late 4th/early 3rd millennium BC). The evaluation stone artefacts using non-invasive analytical methods (Near Infrared Spectroscopy—NIR), combination with mineral-petrograp...

Estimation model between soil moisture content and the near infrared reflectance was established by the linear regression method and the models between soil total nitrogen content and the near infrared reflectance were also established by the BP neural network method and Support Vector Machine (SVM) method. Forty-eight soil samples were collected from China Agricultural University Experimental ...

• Software requirements for analyzing soil profiles and predicting properties. A set of common interactive 2D 3D visualizations chemical measurement data. Machine learning deep approaches Deep model pH H 2 O KCl from Vis–NIR spectra. Soil is an essential element life, properties are crucial in health. Recent developments proximal sensor technologies, such as portable X-ray fluorescence (pXRF) s...

We describe the procedures and results of a geological field analysis campaign in Río Tinto area. This geologically/biologically well-documented site with its rock/water/biology interaction represents an ideal open-air laboratory where to collect spectral data samples useful for testing space instruments. During campaign, we collected large set VIS-NIR (0.35–2.5 μm) measurements using ASD Field...

Fiber-free non-contact near-infrared (NIR) imaging devices using wide-field detectors are emerging apart from the contact and fiber-based NIR devices. Unlike the fiber-based devices that can image deep tissues, the fiber-free noncontact devices have been used only for subsurface imaging (≤1 cm) to date. A new compact (7 × 8 × 12 cm3) handheld Near-Infrared. Optical Scanner (NIROS) has been deve...