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34 results on '"Lv, Bing"'

19. Low Frequency-Noise Ring Random Fiber Laser With a Dual-Cavity FBG Fabry-Perot Filter.

Author

Lv, Bing, Zhang, Wentao, Huang, Wenzhu, and Li, Fang

Abstract

A low frequency-noise ring random fiber laser (RFL) based on random Bragg grating array (RBGA) feedback is proposed. A dual-cavity fiber Bragg grating Fabry-Perot (FBG-FP) filter, which matches the wavelength of RBGA, is specially designed. Due to the narrower bandwidth, flatter response and steeper rolloff, the dual-cavity FBG-FP filter can significantly suppress the competition-induced frequency jitter and undesired residual random lasing modes, and contribute to establish stable lasing and further reduce frequency noise of RFL. The frequency noise of the proposed RFL is ∼3 Hz/√Hz above 1 kHz, and the frequency jitter is ∼3.11 × 10−11 over 10 s. The 3-dB linewidth is ∼490 Hz with a ∼40 dB of optical signal-to-noise ratio. [ABSTRACT FROM AUTHOR]

Published
2022
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22. Distribution network planning considering offshore wind-tide-virtual energy storage system

Author

Wang Yipei, Liu Xi-mei, Lv Bing, and Yu Fei

Subjects
Offshore wind power, Virtual power plant, Electricity generation, Computer science, business.industry, Distributed generation, Marine energy, Submarine pipeline, business, Automotive engineering, Energy storage, Efficient energy use
Abstract

A virtual energy storage system (VESS) is proposed in this paper based on the virtual power plant (VPP) concept to integrate, regulate, coordinate, and optimize all manner of distributed energy storage facilities. In order to make full use of all kinds of marine energy, reduce the fluctuation of power output, and reduce the power-free time of single energy generation, a combined output model of offshore wind-tide-virtual energy storage system is constructed. The effectiveness of the model is proven by simulation analysis. The influence of the offshore wind-tide-virtual energy storage system on the distribution network structure is preliminarily investigated. The results presented here may demonstrate the advantages of the combined output model and improvements to energy efficiency.

Published
2019

23. A 3-D Printed Continuous Carbon Fiber-Reinforced Composite for Highly Effective Microwave Shielding.

Author

Li, Changyou, Zhu, Qian, Lv, Bing, Huang, Yichou, and Wu, Changying

Abstract

The focus of this letter is on a thin, lightweight, and highly effective microwave shielding composite material reinforced by long continuous fibers, which can be easily fabricated with 3-D printing technique. Numerous long continuous carbon fibers are put into a bundle, then many bundles are parallelly arranged in a periodic way, and then embedded into the matrix material to form a single layer. Multiple layers are stacked up one over the other to produce the laminated composite with fiber bundles in each layer orientated into different directions. Numerical investigations have been carried out to discuss various factors which influence the shielding effectiveness, and highly effective shielding is achieved by the two-cross-layer composite. It is easily fabricated via 3-D printing technique, and experimental results are obtained based on square waveguide device to demonstrate the numerical results. [ABSTRACT FROM AUTHOR]

Published
2021
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28. Automatic measurement of scanned human body in fixed posture

Author

Lv Rui min, Liu Yang, Sun Shou qian, Lv Bing ru, and Zhang Zhi dong

Subjects
Surface (mathematics), Engineering, Scanner, business.industry, Torso, Circumference, Length measurement, medicine.anatomical_structure, Body surface, medicine, Segmentation, Computer vision, Artificial intelligence, Graphics, business
Abstract

Clothing customization needs dimensional data of human body. The 3D scanner can only get the surface data, which usually consists of a great many points and triangles. Measurement of the scanned human body automatically is a very complicated problem in practical applications. This paper proposed a simple but rapid method for automatic measurement of scanned human body in fixed posture. We slice the body surface into many paralleled intersections from which we can detect the landmarks that segmentation needs. In every subsection, we continue to extract more detail landmarks for the circumference and the length measurement. We present experimental results to verify our methods are efficient in processing different body data.

Published
2010

29. The research of reverse valuation methods used for product image assets

Author

Ze Xiang Bo, Lin Sheng, Sang Shu Guang, Xue Hong Man, and Lv Bing

Subjects
Finance, Earnings, Present value, business.industry, Product image, ComputerApplications_MISCELLANEOUS, TheoryofComputation_GENERAL, Cost accounting, Fixed asset, Weighted average return on assets, Book value, business, Industrial organization
Abstract

The paper established valuation methods of enterprises product image assets according to earnings present value methods of intangible assets valuation methods on condition that enterprises product image assets is intangible assets, The assets valuation methods of reverse calculation of the enterprise product image overcome the shortcomings of traditional assessment ideas.

Published
2009

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