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Effective and efficient ship detection is a prerequisite in inland video surveillance, e.g. to track the target ship from frame to frame and to analyze the tracked ship to recognize its behavior. In this paper, a real-time inland ship detection algorithm called MEADGS is proposed, which is based on dynamic group sparsity and background subtraction method. The background and foreground image are reconstructed...
In order to effectively prevent direct and indirect losses the lightning disasters bring to coastal ports and guarantee the security of production, this paper proposes to establish a lightning forecast system of ports based on cloud technology, which includes three functions, such as collecting underlying lightning data, analyzing and predicting based on cloud big data technology and pushing warning...
Effective and efficient automatic container code recognition (ACCR) is an important part of Intelligent port management. Due to the severity of nonuniform illumination and invalidation of color information, higher sensitivity and intelligence are required in ACCR. To address this issue, a novel Framework for container code-character recognition based on deep learning and template matching (TM) in...
In the process of cargo handling in bulk port, dynamic weighing of cargo is the basis of the information management system for bulk cargo handling. Due to many interference factors, it is difficult to obtain the actual lifting weight of portal crane by using mechanical way. To address this issue, a new method of using motor power is proposed in this paper. In this method, the real-time motor voltage,...
The behavior of explosive emission cathode plasma was a fundamental physical problem in the study of high current electron beam diode. A diagnosis system was designed for getting the time-resolved and spectrum-resolved emission spectra of cathode plasma on a 1MV diode with dozens of kilo amperes in this paper. A full spectrum of direct reading spectroscopic diagnostic system which includes a high...
Magnetically insulated induction voltage adders are pulsed-power accelerators widely used in various fields. Preliminary cavity experiments concerning the current uniformity have been done on a prototype induction cavity. The cavity is single-point fed by a 1.0-MV/200-kA/60-ns pulse of Chenguang accelerator. Three different configurations of azimuthal lines are tested. The results indicate that the...
In the frog and haze climatic condition, the captured picture will become blurred and the color is partial gray and white, due to the effect of atmospheric scattering. This situation brings a great deal of inconvenience to the video surveillance system, so the study of defogging algorithm in this weather is of great importance. This paper deeply analyzes the physical process of imaging in foggy weather...
In order to guarantee lightning electric field measuring equipment's veracity and relativity, electric field measuring equipment must be emendated before using. In this paper, analysised of the performance of bounded wave simulator, parallel plate electric field generator and homemade U-type emendation device when they were used to emendate lightning electric field measuring equipment. Analysised...
The emergence of horizontal wells brought new vigor to the oil and gas exploration. However, the casing is bended with the hole at the curved portion in horizontal wells, which makes running casing more difficult, because the resistance is larger in horizontal wells than that in vertical ones. Whether the casing strings can run in the bending of horizontal wells relates to the completion style, which...
An important problem in autonomous mobile robot (Mobot) navigation is that the mobot can effectively plan a path in the unknown or partial unknown environment. It’s unpractical to know the environment completely. These factors, such as bias of environmental expression and change of obstacles state, will cause incomplete information of environment. In this case, the motion planning must be implemented...
In this paper, UWB-SAR is used to highway technology. A 2-D FDTD model is used to simulate the behavior of such wide-band radar system. According to the numerical results, the depth of the asphalt above the cement can be decided. And the optimal distance of the transmitter/receiver unit has also been discussed. Thus, through analyzing the data returning to the receiver, we may ensure the highway surface...
This paper presents our global approach to model Ultra Wideband (UWB) FOPEN (Foliage Penetration). In this approach, we consider plane wave scattering (in time domain) from the tree trunks above the soil. The time-domain scattering is computed via FDTD method, which is particularly well adapted to frequency-dependent soil. This method is processed prior to a Fast Fourier Transform (FFT), which is...
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