The detection of adulteration in edible oils is a concern the food industry, especially for higher priced virgin olive oils. This article presents low field unilateral nuclear magnetic resonance (NMR) method oil that can be performed through sealed bottles providing non-destructive screening technique. Adulterations an extra with different percentages sunflower and red palm were measured commercial instrument, profile NMR-Mouse. NMR signal was processed using 2-dimensional Inverse Laplace...

<italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Objective:</i> Passive shielding is usually applied to block electro-magnetic interference (EMI) for portable very-low field MRI scanners, but it goes against the mobility of scanners. Here, reference channel-based active EMI suppression (AES) system was proposed discard them. xmlns:xlink="http://www.w3.org/1999/xlink">Methods:</i> Different from existing studies, this work started with...

This paper proposes a multi-channel magnetic induction tomography measurement system for biological conductivity imaging in human brain model. A hemispherical glass bowl filled with salt solution is used as the model; meanwhile, agar blocks of different are placed to simulate intracerebral hemorrhage. The excitation and detection coils fixed co-axially, axial gradiometer coil order cancel primary field. On outer surface bowl, 15 sensor units arrayed two circles parts, single unit canceling...

Burn depth assessment in clinics is still inaccurate because of the lack feasible and practical testing devices methods. Therefore, this process often depends on subjective judgment burn surgeons. In study, a new unilateral magnetic resonance imaging (UMRI) sensor equipped with 2D gradient coil system was established, we attempted to assess burns using nuclear devices. A reduced Halbach magnet utilized generate field that relatively homogeneous target plane suitable view for spatial...

The use of a close-fitting roughly head-shaped volume coil for MRI (magnetic resonance imaging) has the merit improving filling factor and thus SNR (signal-to-noise ratio) from brain. However, surface RF follows that head which makes it difficult to determine an optimal winding pattern. We describe here new method optimize with objective maximizing its RF-magnetic-field homogeneity operation at ultra-low magnetic field (6.5 mT, 276 kHz).The approach consists FEM (finite-element-method)...

The important role of the distribution cabinets in power system makes voltage monitoring them great significance. However, traditional measurement methods (e.g., electromagnetic transformers) have defects such as galvanic contact and magnetic saturation. Under this background, paper proposes a noncontact (NC) method for three-phase busbar low-voltage cabinets. Injecting high-frequency calibrating signal into capacitive coupling network coupled sensor to achieve self-calibration sensor....

As the researches of electric impedance tomography (EIT) applications in medical examinations deepen, we attempt to produce visualization 3D images human bladder. In this paper, a planar electrode array system will be introduced as measuring platform and series feasible methods are proposed evaluate simulated volume bladder avoid overfilling. The combined regularization algorithm enhances spatial resolution presents distinguishable sketch disturbances from background, which provides us with...

The aging of a silicone rubber insulator threatens the safety power grid. An accurate estimation status is necessary for taking precautions against insulation failure. In this paper, we propose novel unilateral nuclear magnetic resonance (NMR) method to quantify degradation attributed aging. First, NMR sensor was designed specifically transverse relaxation time (T <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> ) measurement. static...

In a companion paper, we have obtained the closed-form solutions to stress and strain fields of two-dimensional Eshelby inclusion. The current work is concerned with complementary formulation displacement. All formulae are derived in explicit closed-form, based on degenerate case three-dimensional (3D) ellipsoidal A benchmark example provided validate present analytical solutions. conjunction our previous study, complete elasticity solution classical elliptic cylindrical inclusion hence...

This study presents a high-performance single-sided portable nuclear magnetic resonance (NMR) sensor. The magnet array, which is composed of five identical cuboid permanent blocks and two passive shimming sheets, generates highly uniform B_{

Silicone rubber insulators (SRIs) play an important role in high-voltage power transmission lines. Given that SRIs critically threaten the safe operation of grid, quantitatively assessing aging status situ is crucial. In this article, a portable unilateral magnetic resonance (UMR) sensor with U-shaped magnet structure and its measuring circuit were designed for nondestructive detection situ. First, optimization efficiency was improved through uniform design method. Then, planar radio...

The sensor determines the basic performance of nuclear magnetic resonance (NMR) logging-while-drilling (LWD) system. However, electromagnetic calculation and structure optimization are complicated difficult. In this study, we proposed an effective design method for inside-out NMR LWD from perspective field. First, a region interest (ROI) was set first, static field strength range in ROI corresponding to ideal operating frequency bandwidth defined as sensitive region, magnet system optimized...

This paper analyzes the dc line fault transient stability characteristics of AC/DC power systems based on three different modular multilevel converter high direct current (MMC-HVDC) configurations. The first configuration is half bridge sub-module MMC (H-MMC) HVDC configuration, which clears faults by tripping ac circuit breakers. Voltage source converters (VSC) with clearance ability constitute second configuration. A line-commutated convener (LCC) and hybrid ability, named LCC-diode-MMC...

Objective. The aim of this study is to investigate continuous blood pressure waveform estimation from a plethysmography (PPG) signal, thus providing more human cardiovascular status information than traditional cuff-based methods.Approach. proposed method utilizes the feature extraction ability convolution neural network estimate (BP) PPG signals without need for analysis and signal extraction.Main results. achieved mean absolute errors standard deviations 2.55 ± 3.92 mmHg systolic BP (SBP),...