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341 results on '"Dong, Shuli"'

36. Water-in-Water Emulsions, Ultralow Interfacial Tension, and Biolubrication

Author

Wang, Yitong, primary, Yuan, Jin, additional, Zhao, Yunpeng, additional, Wang, Ling, additional, Guo, Luxuan, additional, Feng, Lei, additional, Cui, Jiwei, additional, Dong, Shuli, additional, Wan, Shanhong, additional, Liu, Weimin, additional, Hoffmann, Heinz, additional, Tieu, Kiet, additional, and Hao, Jingcheng, additional

Published
2022
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37. A High Dynamic Range Image Fusion Method Based on Dual Gain Image.

Author

Yuan, Linan, Wu, Wenbo, Dong, Shuli, He, Qiangmin, and Zhang, Feiran

Subjects
HIGH dynamic range imaging, AUTOMATIC gain control, IMAGE enhancement (Imaging systems), IMAGE analysis, IMAGE fusion, IMAGE intensifiers
Abstract

For a camera with automatic gain control, two images with high and low optical gain can be output at the same exposure time. Due to the small gain value, most of target details are hidden in the dark pixels for the low gain image, and the brightness saturation usually appears in high gain image for the high luminance areas. To obtain the essential information from the dual gain images, a generation method of high dynamic range image based on dual gain image was developed. The method is composed of five parts, including enhancement of image detail, establishment of Laplacian pyramid, selection of fusion operator, reconstruction of fusion pyramid and adjustment of image contrast. Results showed that combination of the gradient operator for N-1 layer and the neighbourhood filter operator for the Nth layer had better fusion effect. Moreover, based on the analysis of image information entropy and clarity, the fusion efficiency was calculated, and the fusion efficiency of Mertens's method, Jiang's method, Zhang's method, Goshtasby's method and the presented method was 30.5%, 33.5%, 39.5%, 51% and 99%, indicating that the HDR fusion method based on dual gain image is reliable. [ABSTRACT FROM AUTHOR]

Published
2023
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39. Design and implementation of remote sensing object detection system based on MPSoC

Author

Chenghua Cao, Dong Shuli, Li Yang, Wenbo Wu, and Zhang Runxin

Subjects
Edge device, Computer science, Remote sensing application, Overhead (computing), Hardware acceleration, Software system, MPSoC, Object (computer science), Object detection, Remote sensing
Abstract

Real-time detection of object is a hot topic in remote sensing applications. In this field, deep network has shown large potential in terms of accuracy. However, it is difficult to design a lightweight hardware and software system to satisfy the satellite edge deployment due to the complexity of the structure of deep network, large amount of computation and high demand for computing resources and storage. In this article, we propose a lightweight object detecting system, based on MPSoC FPGA processor, to solve the problems. First, the lightweight algorithm for object detection which is suitable for the deployment of satellite edge devices is studied. Then, to reduce the number of parameters and the overhead calculation and storage, a network parameter compression algorithm based on dynamic mapping is laid out. Finally, a prototype verification system based on MPSoC FPGA processor is constructed to realize aircraft object detection. The experimental results highlight that the accuracy of detecting the aircrafts can reach more than 92%. For single frame image with input size of 416×416, the reasoning time is reduced to 7ms, suggesting that the requirement of real-time processing of remote sensing target detection can be met.

Published
2021

45. Design And Implementation of an Efficient Wireless Channel Simulator

Author

Cui Jianling, Tang Yunge, Qiao Huidong, Dong Shuli, and Zhang Taotao

Subjects
Computer science, business.industry, Spectral density, Data_CODINGANDINFORMATIONTHEORY, Harmonic analysis, Superposition principle, symbols.namesake, Computer Science::Networking and Internet Architecture, symbols, Harmonic, Electronic engineering, Wireless, Fading, business, Doppler effect, Computer Science::Information Theory, Communication channel
Abstract

Aiming at the current high-efficiency and accurate simulation of wireless channel fading channels, the article adopts the simulation method of harmonic superposition, and designs a channel simulator by improving the incident angle and initial phase of the incoming wave. The test results show that the statistical distribution of the fading signal envelope and the Doppler power spectrum output by the channel simulator are consistent with the theoretical values. This method can be applied to real and fast reproduction of the propagation characteristics of wireless fading channels.

Published
2021

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