An ultrasonic detection method for dynamic changes of the water content in plant stem

With the development and spread of networks, online education has become a new way in education. The online education platform encounters a large number of concurrent visiting, while the system must guarantee network security in the process of online education. The network visiting requests are real-time and dynamic in online education. In order to detect network intrusion and abnormal access in real time and adapt to the dynamic changes of network visiting requests, this paper adopts a data stream-based network intrusion detection method to monitor and manage online education visiting. First, a knowledge library is constructed by normal visiting mode and abnormal visiting mode. Second, the dissimilarity between data point and data cluster is used to measure the similarity between normal mode and abnormal mode. Lastly, the knowledge library is updated to reflect the changes of network in online education system by re-clustering. The proposed method is evaluated on a real dataset.

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A multi points ultrasonic detection method for material flow of belt conveyor

Young Scientists Forum 2017 ◽

10.1117/12.2317513 ◽

2018 ◽

Author(s):

Li Zhang ◽

Rongjun He

Keyword(s):

Material Flow ◽

Detection Method ◽

Belt Conveyor ◽

Ultrasonic Detection

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Multi frequency ultrasonic detection of water content in transformer oil with GA-BPNN

2018 IEEE International Conference on High Voltage Engineering and Application (ICHVE) ◽

10.1109/ichve.2018.8641924 ◽

2018 ◽

Cited By ~ 1

Author(s):

Zhuang Yang ◽

Qu Zhou ◽

Xiaodong Wu ◽

Chao Tang ◽

Jian Hao ◽

...

Keyword(s):

Water Content ◽

Transformer Oil ◽

Ultrasonic Detection

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Detection Method Optimization, Dynamic Changes during Alcoholic Fermentation and Content Analysis of “Brett Character” Compounds 4-Ethylphenol (4-EP) and 4-Ethylguaiacol (4-EG) in Chinese Red Wines

Food Analytical Methods ◽

10.1007/s12161-016-0719-8 ◽

2016 ◽

Vol 10 (5) ◽

pp. 1616-1629 ◽

Cited By ~ 1

Author(s):

Xiangyu Sun ◽

Xuan Luo ◽

Tingting Ma ◽

Yilin You ◽

Weidong Huang ◽

...

Keyword(s):

Content Analysis ◽

Alcoholic Fermentation ◽

Detection Method ◽

Red Wines ◽

Dynamic Changes ◽

Method Optimization

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Research on Environmental Materials with Complex Resistivity Dispersion Properties of Chrome-Contaminated Soil

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.540.263 ◽

2014 ◽

Vol 540 ◽

pp. 263-266

Author(s):

Hao Rui Liu ◽

Chang Xin Nai

Keyword(s):

Water Content ◽

Detection Method ◽

Salt Content ◽

Complex Phase ◽

Complex Resistivity ◽

Dispersion Properties ◽

Detection Technology ◽

Environmental Materials ◽

Soil Complex ◽

Soil Dispersion

The complex resistivity dispersion experiment of the soil with different water content and different chromic salt content is the base of the complex resistivity detection method which will be used for evaluating the field polluted by chromium residue. By the soil complex resistivity dispersion properties experiment in kinds of conditions, we find that complex resistivity amplitude, phase, in-phase resistivity and out-phase resistivity can be influenced by the water content and contamination content; but the complex phase and out-phase resistivity have the obvious dispersion properties. The experiment result shows that the complex resistivity detection technology based on soil dispersion properties can be used to evaluate the field polluted by chromium residue.

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Moving Target Shadow Analysis and Detection for ViSAR Imagery

Remote Sensing ◽

10.3390/rs13153012 ◽

2021 ◽

Vol 13 (15) ◽

pp. 3012

Author(s):

Zhihua He ◽

Xing Chen ◽

Tianzhu Yi ◽

Feng He ◽

Zhen Dong ◽

...

Keyword(s):

Detection Method ◽

Simulated Data ◽

Shadow Detection ◽

Frame Rate ◽

Moving Target ◽

Sar Images ◽

Dynamic Changes ◽

Moderate Resolution ◽

Formation Method ◽

Ground Moving Target Detection

The video synthetic aperture radar (ViSAR) is a new application in radar techniques. ViSAR provides high- or moderate-resolution SAR images with a faster frame rate, which permits the detection of the dynamic changes in the interested area. A moving target with moderate velocity can be detected by shadow detection in ViSAR. This paper analyses the frame rate and the shadow feature, discusses the velocity limitation of ViSAR moving target shadow detection and quantitatively gives the expression of velocity limitation. Furthermore, a fast factorized back projection (FFBP) based SAR video formation method and a shadow-based ground moving target detection method are proposed to generate SAR videos and detect the moving target shadow. The experimental results with simulated data prove the validity and feasibility of the proposed quantitative analysis and the proposed methods.

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