Integrated cataluminescence (CTL) sensing for both identification and quantification has become the focus in gas-sensing methods. With development of an integrated circuit, inspiration from electronic automation provided a convenient approach application CTL sensors. Here, global dielectric barrier discharge plasma system supported by digital code is raised process-oriented sampling gaseous dynamic dual-route reaction rapid quantitative qualitative analysis oxidative volatile organic...

With the intensification of explosive-based terrorism attack and environmental concerns, innovation high-efficiency portable sensors for facile, rapid, reliable monitoring explosives has become one major demands in societies. Herein, a easy-to-use cataluminescence sensor system based on Dy3+ doping La2O3 nanorod catalysts been developed identification detection six types military explosive vapors, including homologous compounds even isomers. The efficient discrimination is to make full use...

This paper proposes an S-band microwave transmitting system based on four-way master-slave injection-locked magnetrons, which has the advantages of low cost and high efficiency. The consists a generator antenna array. provides excitations with equal phases amplitudes to array, where radial divider is applied produce control injected signals lock slave magnetrons. array includes four pyramid horns two layers artificial materials 2-D periodic corner-truncated square slots, are arranged enhance...

Abstract Recently, a computer-generated moiré profilometry was proposed by our research group. It can effectively avoid the influence of transient caused fringes’ direct acquisition and generally owns higher accuracy. But when spatial spectrum captured deformed pattern is severely aliased measured object, accuracy this method may be affected to some extent due impure background light component extraction. So, high precision based on component’s accurate elimination proposed. By adding an...

With the development of intelligent transportation system, maintenance railway turnout is an essential daily task which was required to be efficiency and automatically. This paper presents diagnosis method based on deep learning curve segmentation Support Vector Machine. Firstly, we studied approach real-time monitoring power data collected form turnout, for step do a great help improve diagnose accuracy. Then well pre-processed sets, SVM algorithm applied classify samples report health...

In real-time phase measuring profilometry based on color-encoded sinusoidal three-step phase-shifting algorithm, three frames of red (R), green (G), and blue (B) individual channel gratings with an equivalent shifting 2π/3 are combined to be a color fringe pattern. While this pattern is projected onto the measured object rapidly sequentially by special digital light projector, high-speed monochrome camera synchronized projector signal used capture corresponding deformed patterns in R, G, B...

The uniform Fabry-Perot leaky-wave antennas (LWAs) achieve pattern shaping due to a controlled aperture phase field, which is implemented by using partially reflective surface (PRS) with variable propagation constant on ground plane. PRS can convert the radiation from pencil beam flat-topped when tuning constant. Meanwhile, beamwidth of LWA becomes inevitably wide. nonuniform LWA, provide nonlinearly variant thus proposed narrow pattern. concentrated much preferred in microwave wireless...

An online triple-frequency color-encoded fringe projection profilometry is proposed to measure the complex and discontinuous object at straight-line movement. N frames of color patterns are specially designed. Three grayscale sinusoidal grating with geometric progression frequency growth encoded into red (R), green (G), blue (B) channels separately compose a pattern. If these three phase-shifted steps an equivalent shift phase 2π/N, they can corresponding as above respectively. In order...

In this article, a nonvacuum-cooling compact (NVCC) scientific charge-coupled device (CCD) camera is presented that includes low noise clocks, bias driver circuit, data acquisition and temperature control circuit. Experiments are conducted to test the readout performance of proposed imaging system. The scheme for generating CCD clocks circuit through ultralow low-dropout regulators designed. entire design can operate from -40 °C 40 °C. results show system run at maximum rate 5 Mpixels/s. as...

Fusion method based on Discrete Wavelet Transform (DWT) has been wide used in Multisource image fusion. However, some shortcomings such as the shift sensitivity and poor-direction-selectivity of DWT afiected quality fused image. In this paper, a fusion Dual-tree Complex (DT-CWT) is proposed, which can be for integrated map from optical SAR DT-CWT an extension DWT, it provides simple mathematical framework, multiresolution multi-direction. more efiective than because direction selectivity...

We study the geometry of a 2-dimensional cyclic pursuit problem where n identical mobile agents modeled as unicycles are driven by distributed control law. The agent i pursuits + 1 modulo with same constant forward speed. propose, for first time, stable relative (1 : n)-periodic trajectory (RPT) polygonal chain formed system sufficiently large n. Unlike regular polygon, evolves into shape figure-eight while follows this RPT. can be approximated closed Euler elastica. show several geometrical...

The great circle route is often used for the navigation on sea and in air. In this paper, its plotting four main chart projections including polar stereographic projection, Gauss Mercator projection gnomonic proposed. equations of are derived from earth. By making longitude or latitude coordinate as parameter, formulae evaluation curvature extreme distance derived. numerical implementations also provided. proved to be suitable navigation, gauss chart.

Combining wavelet transform and artificial neural network, a network for harmonic detection is proposed. By setting the function as excitation transfer of new structure designed to meet requirements detection, which can obtain parameters such fundamental frequency, amplitude phase at one time. Finally, through simulation analysis, experimental results show that method effective accurate.

The aim of this work was to strengthen the compressive property coated TiCN-based cermets. Plasms nitriding (PN) continuously followed by physical vapor deposited (PVD) TiAlN coating were carried out on Variable N2/Ar ratio mixture gas used as plasma discharge atmosphere. structure and properties cermets investigated. results showed that surface hardness N contents substrate increased, grain refined after increasing ratio. All coatings (200) orientation dominated. TEM revealed grains piled...

The imaging through atmospheric turbulence is an inevitable problem encountered by infrared sensors working in the environment. Before light-rays enter window of sensors, will randomly interfere with transmission light waves came from objects, causing distribution image intensity values on focal plane to diffuse, peak value decrease, get blurred, and pixels deviate, making identification very difficult. Owing fact long processing time that turbulent flow field unknown hard be described...