This paper focuses on the design and fabrication of a high-temperature piezoresistive pressure sensor with an integrated signal-conditioning circuit, which consists encapsulated pressure-sensitive chip, temperature compensation circuit circuit. A silicon insulation (SOI) material standard MEMS process are used in chip fabrication, electronic components adopted temperature-compensation circuits. The entire achieves hermetic seal can be operated long-term range -50 °C to 220 °C. Unlike...

Due to the similarity of Brillouin optical time domain analyzer (BOTDA) signals, image denoising could be utilized remove noise. However, performance can much degraded due inaccurate noise level estimation. By numerical and experimental study, we compare estimation three different methods for BOTDA: calculating standard deviation (STD) measurements, a filter-based algorithm, patch-based algorithm proposed in this paper, which selects weak textured patches BOTDA signal then estimates using...

The main limitation of high-temperature piezoresistive pressure sensors is the variation output voltage with operating temperature, which seriously reduces their measurement accuracy. This paper presents a passive resistor temperature compensation technique whose parameters are calculated using differential equations. Unlike traditional experiential arithmetic, equations independent parameter deviation among piezoresistors microelectromechanical sensor and residual stress caused by...

According to the standard of GB/T4754-2017 Classification National Economic Industry and characteristics textile apparel industry, industry is divided into three categories: clothing chemical fiber manufacturing industry. Based on panel data from 2010 2019, this paper measures green total factor productivity (GTFP) by using unexpected output super efficiency SBM model ML index. On basis, empirically tests impact digital economy GTFP dual intermediary effects rationalization industrial...

The proposed method for measuring the liquid level focuses on ultrasonic impedance and echo energy inside a metal wall, to which sensor is attached directly, not waves that penetrate gas-liquid medium of container. Firstly, by analyzing sound field distribution characteristics in this paper proposes concept an "energy circle" discusses how calculate under three different states detail. Meanwhile, transmitting receiving circuit designed convert circle into its equivalent electric power....

The periodic impulse feature is the most typical fault signature of vibration signal from rolling element bearings (REBs). However, it easily contaminated by noise and interference harmonics. In order to extract incipient signal, this paper presented an autocorrelation function harmonic ratio (ACFHNR) index based on SVD-Teager energy operator (TEO) method. Firstly, Hankel matrix constructed raw bearing, SVD method used obtain singular components. Afterwards, ACFHNR employed measure abundance...

Obesity is associated with a number of health problems, especial insulin resistance and Type 2 diabetes. Our previous study showed that obese males had decreased neural activity in the orbital frontal cortex (OFC) increased left putamen (Zhang et al., 2015), which could indicate altered eating behaviors obesity related to hyper-functioning striatum hypo-functioning inhibitory control. Accordingly, our goal current was determine whether there are alterations brain structures within these two...

This study presents a novel method for determining the liquid level from outside of sealed container, which is based on balance echo energy received by two receiving sensors. The proposed uses one transmitting transducer and sensors that are encapsulated in coupling plane arranged certain rules. calculation comparison grounded difference ultrasonic impedance between gas media. First, analyzing propagation attenuation characteristics waves solid, an acoustic model calculating established...

This research put forward an exogenous liquid level measurement method based on continuous sound wave amplitude. The distribution of round piston transducers in the field a metal solid was analyzed by building 15 Multi-Gaussian Beam superposition models; calculation for echo pressure worked out according to reflection and refraction properties ultrasonic wave. with three amplitudes used as driving source sensor, two single-crystal sensors same diameter were transmitting terminal receiving...

This paper proposes a cost-effective, compact, noncontacting optoelectronic targeting system for measuring the distribution of projectile motion. The major elements this include light emitting diode (LED) array, photodiode detecting double-layered aperture arrays, adaptive threshold circuit, and date acquisition. Through cooperating with effectively reduces radiation width source to surface, filters out influence incident from adjacent apertures on both sides above each corresponding...

Health indicators (HIs) are greatly significant in sustaining the stable operation of machines and guiding implementation predictable maintenance. Traditional HIs such as kurtosis, negentropy, Gini index manifest some concessions certain scenarios. In this study, we propose a new geometric partition L-Kurtosis (GLK) indicator for bearing condition monitoring leveraging its splendid fault characterization, it is proved to be advantageous perceiving incipient occurrence outlining sufficiently...

Hyperspectral imaging technology can obtain the spatial information and spectral of simulated operational background its camouflage materials at same time identify classify them according to their differences. In this paper, we collected hyperspectral images (400–1000 nm) desert background, jungle netting, clothing through system, samples were preprocessed by denoising black-and-white correction. Then, analysed region interest (ROI) training principal component analysis (PCA). After pixels...

Spherically symmetric volume elements (blobs) have better resolution–noise performance than voxels because of the overlapping their rotational basis functions; however, using blobs is more computationally expensive due to blob overlap. In this paper, we propose an immediate after-backprojection filtering method (ABF) with blob-shaped window functions for a voxel-based reconstruction. We compared general (without filtering), blob-based method, between-iteration (BIF) and post-filtering (POF),...

By simulating the sound field of a round piston transducer with Kirchhoff integral theorem and analyzing shape ultrasound beams propagation characteristics in metal container wall, this study presents model for calculating echo pressure by using paraxial approximation theory, based on which according to different ultrasonic impedance between gas liquid media, method detecting level from outside sealed containers is proposed. Then, proposed evaluated through two groups experiments. In first...

This paper expounded the basic principle of phase interferometer system, established positioning model one-dimensional double-base line, improved bearing accuracy and solved fuzzy problem. The whole circuit system was designed, radio signal communication implemented by RF transceiver chip, low frequency used as to modulate it carrier, antenna radiated electromagnetic wave outside, main station were identify whether corresponding useful or not, received two slave stations went through filter,...

In order to solve the weakness of traditional vertical target coordinate measurement, such as complex structure, inconvenient debugging and difficult form a large area target, method based on intersection laser screens was proposed. The effective constituted by two fan-shaped screens. Photodiode (PD) array used measure intensity light. When projectile passes through screens, corresponding PDs receive signal. After signal processing adaptive threshold comparator circuit processing, is...

Geological evolution determines the spatial distribution of hydraulic conductivity in natural field. This pattern is often characterized using geostatistics and estimates at unmeasured locations are obtained from kriging. In this paper, potential a special class artificial neural networks (ANNs) called radial-basis function (RBF) explored to perform interpolation conductivity. These derive their structure interpretation theory multidimensional spaces. Such networks, almost invariably,...

Blobs have better resolution-noise performance than voxels because of the overlapping their rotational symmetric basis functions; however, using blobs is more computationally costly due to blob overlap. We propose an immediate after-backprojection filtering method (ABF) with blob-shaped window functions for a voxel-based reconstruction. compared this general (without filtering), blob-based method, between-iteration (BIF) and post-filtering (POF), computer simulations. The reconstruction...

The velocity of warhead fragment is the key criteria to determine its mutilation efficiency. But owing small size, larger quantity, irregular shape, high speed, arbitrary direction, large dispersion and adverse environment, test parameter very difficult. paper designed an optoelectronic system measure average fragments accurately. apparatus included two parallel laser screens spaced apart at a known fixed distance for providing time measurement between start stop signals. effective screen...

Abstract for Part 1:This paper is the first of a two-part study that discusses real-time global optimal energy management strategy (EMS) connected plug-in hybrid electric vehicles (PHEVs). The rapid development intelligent transportation systems (ITS) enables PHEVs to perceive traffic flow conditions ahead. Based on this information, two-layer structure future driving condition prediction algorithm developed. top layer cloud receives information from commercial provider execute long-term...

The impacting or penetrating power of high-speed flying object can be evaluated by its mass and velocity, so the velocity are two key parameters. Here we present an optoelectronic measurement method for parameters objects based on parallel laser screen photodiode array. system consists thin screens with each other certain distance, orthogonal dimensional arrays, data acquisition module, control module transmission processing module. When flies through screen, incident light some photodiodes...