Abstract To address the challenge of limited training samples in natural gas pipeline leakage detection, a novel transfer learning framework is proposed, which requires only small amount data from specific leak aperture as source domain set. Additionally, new residual structure, named Dual-Pieces Net, designed. This structure combines cross-layer fusion networks with convolutional fragmenting mechanism. By processing feature maps various ways through fragmentation, it enhances model's...

<div class="section abstract"><div class="htmlview paragraph">Energy management strategy is essential for HEV’s to achieve an optimum of energy consumption. With predictive management, taking future vehicle speed predicted from ADAS map information, in-vehicle navigation traffic flow status and current into account, one could anticipate a considerable improvement in energy-saving. The major validating approach widely adopted algorithms nowadays real-world testing, which the...

Increasing attention is being devoted to the airborne emissions resulting from a variety of manufacturing processes because health, safety, and environmental concerns. In this two-part paper, model presented for amount cutting fluid mist produced by interaction with rotating cylindrical workpiece during turning operation. This based on relationships that describe atomization, droplet settling, evaporation. Experiments are performed validate model. Part 1 emphasis development. model, thin...

The integration of intelligent spore image sequence capture device is designed for capturing spores and then generates a series images. Powdery mildew an extremely harmful bacteria in agricultural crops. This paper mainly introduced new method which could realize the automatic detection powdery spores. included pre-processing, segmentation, feature extraction identification. Pre-processing illumination compensation, graying, enhancement. Image segmentation binary, smoothing. Finally...

An electromagnetic flowmeter (EMF) can be used to measure the speed of slurry fluid.In this paper, according Maxwell's equations and dB/dt vortex electric field, a step excitation scheme is proposed.The original process primary current rise time divided into two-step process.Without increasing time, equivalent frequency increased by dB/dt.This method enhance EMF's ability overcome noise.The paper analyzes design parameters designs software hardware.After that, compares with three-value...

Abstract Fundamental mechanisms of cutting fluid mist formation via atomization are investigated. As the impacts a stationary flat workpiece surface, liquid film develops over surface and disintegrates into droplets. Past research has shown Sauter mean diameter droplets to be proportional thickness. For jet impinging on rotating workpiece, three different disintegration modes (drop mode, ligament mode mode) considered. The critical flow rates for transition diameters drops evaluated respectively.

In Part 1 of this paper a model was developed to describe the formation mechanisms and dynamic behavior cutting fluid mist. This part focuses on an experimental investigation mist generated by interaction with rotating cylindrical workpiece during turning operation simulation droplets, resulting in prediction droplet size distribution mass concentration within machining environment. These results are compared measurements order validate theoretical presented paper. It is observed that...

Global navigation satellite system signals are easily distorted by the interferences or disturbances, and global receivers cannot offer continuous effective results in challenging environments. As a representative regional augmentation technology, pseudolite has potential to provide accurate positioning service satisfy specific performance requirements various applications. In this article, we developed dynamic localization network based on technology for purpose. First, collaborative...

The step excitation electromagnetic flowmeter (EMF) can be used to measure slurry-type fluid. Due the interference of slurry noise, flow signal will have irregular baseline drift and fluctuation during measurement. This cause abnormal abrupt changes in amplitude demodulated signal. In order reduce influence this paper, a model is established, outlier identification method proposed accordingly. Based on this, paper proposes processing scheme based elimination double median filtering. uses...

The ignition reliability of the combustion chamber is crucial for overall performance an engine. As aero-engine chambers continue to advance, scope problem has also expanded. This study employs large eddy simulation investigate flow characteristics and process a double-swirl combustor. non-reacting field propagation are acquired using particle image velocimetry (PIV) high-speed cameras. Experimental findings employed validate numerical simulations. results demonstrate close relationship...

Abstract Cutting fluid mist is becoming an increasing concern for manufacturers as additional information obtained on the health risks that it poses. This two-part paper focused investigating cutting formation via atomization mechanism in a turning process. Models will be established to predict mean drop size well distribution. Predictive relationships also presented settling behavior of and mass concentration. Part 1 devoted development requisite models describe creation phenomena. In 2...

Abstract In Part 1 of this paper, models were developed to describe the formation mechanisms and dynamic behavior cutting fluid mist. This part paper focuses on experimentally investigating mist during turning process, then simulating droplets, including distribution mass concentration. Simulation results are compared experimental measurements validate theoretical presented in 1. It is seen that model predictions adequately characterize observed behavior.

Based on the measured and denoised vehicle engine noises, sound quality evaluation (SQE) techniques in common use for A-weighting pressure level (SPL) psychoacoustical parameters, such as loudness, sharpness roughness, are performed compared this paper. The wavelet threshold shrinkage method is adopted signal denoising. comparisons suggest that SPL not sufficient can only be used a reference SQE, parameters provide complete description more exactly reflect to subjective feeling of should...

The V.29 fax demodulation principle is studied, the algorithms of carrier synchronization, inverse signal space mapping and cancellation redundant data are improved. improved algorithm also implemented. Test show that an ideal optimization effect achieved.

Abstract At present, dump diffuser is basically adopted in the combustion chamber of aeroengine. The total pressure loss it may account for 30% or even higher chamber. So necessary to optimize various geometric parameters diffuser. In order solve problem increasing experimental cost due multi-parameter optimization, response surface method (RSM) was used study performance diffuser’s three at inlet Mach numbers (Ma = 0.27, 0.20 and 0.10), namely pre-diffuser expansion angle, gap ratio side...