Search

Your search keyword '"Mu, Qiang"' showing total 10 results
Start Over Author "Mu, Qiang" Publisher ieee
10 results on '"Mu, Qiang"'

7. Onboard EPR Cable Aging Evaluation by Rectangular-SPP-CNN Based on LMMGS Processing Method.

Author

Quan, Shengwei, Gao, Shibin, Mu, Qiang, Liu, Cong, Zhou, Lijun, and Wang, Dongyang

Subjects
CABLE structures, CONVOLUTIONAL neural networks, MACHINE learning, CABLE-stayed bridges, FEATURE extraction, ELECTRIC locomotives, CABLES
Abstract

Onboard cable is important electrical equipment of an electric locomotive. In order to effectively evaluate the aging state of the cable, this article proposes a method to evaluate the aging state of the cable based on a new method of dielectric spectrum data processing and a new structure model of recognition algorithm. First, the log-min-max gray-scale (LMMGS) method is proposed, which transforms the dielectric parameters based on the frequency-domain dielectric spectrum (FDS) test into the gray matrix. The correlation among different dielectric parameters is retained, and the interference of their order of magnitude difference on feature extraction is reduced. Then, the new structure of spatial pyramid pooling (SPP) is improved by rectangular mesh dividing named Rectangular-SPP, which increases the number of divisible layers of the spatial pyramid, and it is used to optimize convolutional neural network (CNN), so as to remove the limitation of recognition algorithm on the size of input data and expand the scale of feature extraction. Finally, a set of methods for evaluating the aging state of onboard cable is proposed. The experimental results show that this method can effectively distinguish the insulation aging state of onboard cable. Meanwhile, the proposed Rectangular-SPP-CNN algorithm has a better performance than the conventional machine learning algorithms. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

8. Distributed storage system for satellite platform based on SpaceWire network: SpaceWire missions and applications, short paper

Author

Mu Qiang, Liu Weiwei, Li Xin, Yu Junhui, Wang Luyuan, and Niu Yuehua

Subjects
Star network, Router, 020301 aerospace & aeronautics, Engineering, Distributed database, business.industry, Payload, 02 engineering and technology, 01 natural sciences, SpaceWire, 0203 mechanical engineering, Backup, Embedded system, 0103 physical sciences, Distributed data store, Computer data storage, business, 010303 astronomy & astrophysics, Computer hardware
Abstract

To satisfy more and more complicated requirements on information recording, processing, exchange etc. in newly developed intelligent satellites, a distributed storage system is designed based on SpaceWire network in satellite platform. In this distributed storage system, a SpaceWire router unit serving as the core device of star network connects several nodes, including onboard computers, namely, satellite management unit (SMU), data interface units (DIU) and other nodes like attitude and orbit sensors, space environment monitor instruments and payload controllers, etc. A certain number of standard flash memory modules are separately incorporated into SMU and DIUs to provide comprehensive data recording and exchange service for all nodes in the network. All memory modules are centrally controlled by SMU software to store authorized data in specific type files and retrieve data according to policies set by remote memory access protocol commands. Memory modules that can run in parallel in the distributed storage system produce very high data throughput, which boosts satellite platform capability to a great extent. Backup mechanism among memory modules is deployed and any module can be replaced by others when it meets failure, this makes the storage system robust and reliable. Testing and verification work performed on the distributed storage system shows that the system works quite well and also reveals its attractive effect on improving satellite platform efficiency.

Published
2016

9. Study on temporal equalizer for 8-element adaptive array antennas

Author

Mu Qiang and Meng Weixiao

Subjects
Recursive least squares filter, Base station, Engineering, Intersymbol interference, Interference (communication), business.industry, Telecommunications link, Time division multiple access, Electronic engineering, Filter (signal processing), Antenna (radio), business
Abstract

In high-speed multimedia mobile communications, when multi-path signal arrive at the antenna, different time delays must exist among different paths, which bring about inter-symbol interference (ISI). Therefore, the technique called temporal equalizer for 8-element adaptive array antennas (AAA) is studied in this paper. This technique is realized through landscape orientation filter, whose weight vector is formed by RLS algorithm. AAA is only employed on base station, meanwhile, transmitting downlink signal with a simple way. Computer simulation runs in the environment with TDMA/TDD frame structure. The result shows that the BER value is improved and the performance is better than ever.

Published
2003

Catalog

Books, media, physical & digital resources
See catalog results