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浏览/检索结果: 共6条，第1-6条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Performance analysis of cooperative cognitive radio networks based on hybrid NOMA/OMA and best relay selection 期刊论文 IET Communications, 2022 作者:  Li, Suoping;  Liang, Wenwu;  Xu, Qianyu;  Yang, Nana;  Jia, Kejun 收藏  |  浏览/下载：29/0  |  提交时间：2022/09/22 Cognitive radio  Decoding  Error correction  Outages  Cooperative Cognitive Radio Networks  Cooperative schemes  Multiple access  Network-based  Non-orthogonal  Performances analysis  Retransmissions  Secondary networks  Secondary user  Superimposed signal   Optimization Design and Performance Analysis of Improved IEEE802.11p MAC Mechanism Based on High Mobility of Vehicle 期刊论文 Mathematical Problems in Engineering, 2022, 卷号: 2022 作者:  Peng, Jiankui;  Li, Suoping;  Dou, Zufang;  Yang, Sa 收藏  |  浏览/下载：11/0  |  提交时间：2022/07/20 Network performance  Vehicle performance  Vehicle transmissions  Core factors  Design Analysis  High mobility  High Speed  IEEE802.11p  Mechanism-based  Optimization design  Performances analysis  Vehicle mobility  Vehicular Adhoc Networks (VANETs)   Soft forwarding technique for unitary space-time modulation 期刊论文 IET communications, 2013, 卷号: 7, 期号: 16, 页码: 1810-1817 作者:  Qianqian Liu;  Yewen Cao 收藏  |  浏览/下载：3/0  |  提交时间：2019/12/23 error statistics  fading channels  maximum likelihood detection  radio  receivers  radio transmitters  amplify and forward communication  SNR  gain  parallel relay network  bit-error-rate performances  amplify-and-forward schemes  detect-and-forward schemes  generalised  signal-to-noise ratio  detection methods  normalisation factors  relay  forwarding functions  maximum-likelihood detection  UST signal  source  unitary space-time signal  relay regenerates signal  receivers  transmitters  channel state information  piecewise-constant fading  scenarios  estimate-and-forward  information-based forwarding  soft  forwarding schemes  unitary space-time modulation  soft forwarding  technique   A study of operation performance of network cooperation based high-tech enterprise cluster 期刊论文 PROCEEDINGS OF THE FOURTH INTERNATIONAL CONFERENCE ON MANAGEMENT SCIENCE AND ENGINEERING MANAGEMENT, 2010, 页码: 527-529 作者:  Deng, FM 收藏  |  浏览/下载：4/0  |  提交时间：2019/02/28 network cooperation  high-tech enterprise cluster  operation performances  network performance  enterprise resource management   Non-stationary vibration signal analysis and fault diagnosis method of aircraft power plant using wavelet network 会议论文 Chinese Control and Decision Conference 2008, CCDC 2008, Yantai, Shandong, China, July 2, 2008 - July 4, 2008 作者:  Zhao, Jianming;  Liu, Jinjun 收藏  |  浏览/下载：4/0  |  提交时间：2017/01/17 Electric fault currents  Aircraft  Curve fitting  Electric power plants  Least squares approximations  Power plants  Signal analysis  Signal processing  Speech recognition  Systems engineering  Telecommunication  Wavelet transforms  Aero engines  Aeroengine  Eigenvectors  Fault diagnosis  Fault diagnosis method  Fault patterns  Feature vectors  Multi-resolution analysis  Network performances  Network structures  Non-stationary  Pattern recognition  Recursive orthogonal least squares algorithm  Self-organizing learning  Self-organizing learning array  Simulation results  Trained network  Training and testing  Vibration signal analysis  Wavelet networks  Wavelet transform   Wavelet packet and neural network basis medical image compression (EI CONFERENCE) 会议论文 4th International Conference on Photonics and Imaging in Biology and Medicine, September 3, 2005 - September 6, 2005, Tianjin, China Zhao X.; Wei J.; Zhai L. 收藏  |  浏览/下载：14/0  |  提交时间：2013/03/25 It is difficult to get high compression ratio and good reconstructed image by conventional methods  we give a new method of compression on medical image. It is to decompose and reconstruct the medical image by wavelet packet. Before the construction the image  use neural network in place of other coding method to code the coefficients in the wavelet packet domain. By using the Kohonen's neural network algorithm  not only for its vector quantization feature  but also for its topological property. This property allows an increase of about 80% for the compression rate. Compared to the JPEG standard  this compression scheme shows better performances (in terms of PSNR) for compression rates higher than 30. This method can get big compression ratio and perfect PSNR. Results show that the image can be compressed greatly and the original image can be recovered well. In addition  the approach can be realized easily by hardware.