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Jin WANG,Feng SHU,Ri-qing CHEN,Yu-di CUI,Yu CHEN,Jun LI
《信息与电子工程前沿(英文)》 2016年 第17卷 第3期 页码 265-280 doi: 10.1631/FITEE.1500134
关键词: Multi-pair two-way relay Adaptive robust beamformer Channel state information (CSI) Maximum signal-to-interference-and-noise ratio (Max-SINR) Maximum signal-to-leakage-and-noise ratio (Max-SLNR)
基于特征分析和最大信干噪比波束形成器的鲁棒广义旁瓣消除器 Research Articles
Quan-dong WANG, Liang-hao GUO, Wei-yu ZHANG, Sui-ling REN, Chao YAN
《信息与电子工程前沿(英文)》 2019年 第20卷 第7期 页码 975-987 doi: 10.1631/FITEE.1700367
Target tracking methods based on a signal-to-noise ratio model
Dai Liu, Yong-bo Zhao, Zi-qiao Yuan, Jie-tao Li, Guo-ji Chen,ybzhao@xidian.edu.cn
《信息与电子工程前沿(英文)》 2020年 第21卷 第12期 页码 1671-1814 doi: 10.1631/FITEE.1900679
韩修廷,王洁春,焦振强,高飞,宋宇波
《中国工程科学》 2005年 第7卷 第10期 页码 64-68
提出了在套损振动波检测过程中提高信号信噪比的方法。检测过程中,在井口敲击套管并接收、分析套管的回波,以了解介质的变化情况。由于反射波信号强度较微弱,单纯用一组接收信号无法进行正确的套损分析,采用信号增强方法,即利用多个类似信号进行叠加,增强反射波的有效信号,降低背景噪声,从而得到有用信息,进行正确的套损状况分析。开发了相应的信号处理软件,提高了信号处理速度。通过10井次的测试表明,技术原理可行,软件工作稳定、可靠,便于操作,可以进行多种方法的信号处理,极大地提高了工作效率。
Controlling interstory drift ratio profiles via topology optimization strategies
《结构与土木工程前沿(英文)》 2023年 第17卷 第2期 页码 165-178 doi: 10.1007/s11709-022-0892-3
关键词: interstory drift ratio aggregation function bound formulation min–max problem topology optimization
High-order phase-field model with the local and second-order max-entropy approximants
Fatemeh AMIRI
《结构与土木工程前沿(英文)》 2019年 第13卷 第2期 页码 406-416 doi: 10.1007/s11709-018-0475-5
关键词: second-order maximum entropy local maximum entropy second- and fourth-order phase-field models B-spline
Zilin HUANG,Gang WANG,Shaopeng WEI,Changhong LI,Yiming RONG
《机械工程前沿(英文)》 2016年 第11卷 第3期 页码 242-249 doi: 10.1007/s11465-016-0397-7
Laser hot wire cladding, with the prominent features of low heat input, high energy efficiency, and high precision, is widely used for remanufacturing metal parts. The cladding process, however, needs to be improved by using a quantitative method. In this work, volumetric defect ratio was proposed as the criterion to describe the integrity of forming quality for cladding layers. Laser deposition experiments with FV520B, one of martensitic stainless steels, were designed by using the Taguchi method. Four process variables, namely, laser power (P), scanning speed (Vs), wire feed rate (Vf), and wire current (I), were optimized based on the analysis of signal-to-noise (S/N) ratio. Metallurgic observation of cladding layer was conducted to compare the forming quality and to validate the analysis method. A stable and continuous process with the optimum parameter combination produced uniform microstructure with minimal defects and cracks, which resulted in a good metallurgical bonding interface.
关键词: process optimization Taguchi method signal-to-noise (S/N) ratio volumetric defect ratio laser hot wire cladding
Electromagnetic interference modeling and suppression techniques in variable-frequency drive systems
Le YANG, Shuo WANG, Jianghua FENG
《机械工程前沿(英文)》 2018年 第13卷 第3期 页码 329-353 doi: 10.1007/s11465-018-0466-1
Electromagnetic interference (EMI) causes electromechanical damage to the motors and degrades the reliability of variable-frequency drive (VFD) systems. Unlike fundamental frequency components in motor drive systems, high-frequency EMI noise, coupled with the parasitic parameters of the trough system, are difficult to analyze and reduce. In this article, EMI modeling techniques for different function units in a VFD system, including induction motors, motor bearings, and rectifier-inverters, are reviewed and evaluated in terms of applied frequency range, model parameterization, and model accuracy. The EMI models for the motors are categorized based on modeling techniques and model topologies. Motor bearing and shaft models are also reviewed, and techniques that are used to eliminate bearing current are evaluated. Modeling techniques for conventional rectifier-inverter systems are also summarized. EMI noise suppression techniques, including passive filter, Wheatstone bridge balance, active filter, and optimized modulation, are reviewed and compared based on the VFD system models.
关键词: variable-frequency drive (VFD) electromagnetic interference (EMI) motor drive modeling EMI noise suppression
Overlap maximum matching ratio (OMMR): a new measure to evaluate overlaps of essential modules
Xiao-xia ZHANG,Qiang-hua XIAO,Bin LI,Sai HU,Hui-jun XIONG,Bi-hai ZHAO
《信息与电子工程前沿(英文)》 2015年 第16卷 第4期 页码 293-300 doi: 10.1631/FITEE.1400282
关键词: Protein-protein interaction network Essential protein modules Overlap Overlap maximum matching ratio
一种通过循环前缀再利用改善OFDM系统带宽的新型节能ICI消除技术 Article
Sandeep SAROWA, Harmanjeet SINGH, Sunil AGRAWAL, B. S. SOHI
《信息与电子工程前沿(英文)》 2017年 第18卷 第11期 页码 1892-1899 doi: 10.1631/FITEE.1601333
关键词: multiplexing OFDM);快速傅立叶变换(Fast Fourier transform, FFT);循环前缀(cyclic prefix CP);符号间干扰(inter symbol interference, ISI);载波间干扰(inter carrier interference ICI);最大似然估计(maximum likelihood estimation MLE)
Predicting the elemental compositions of solid waste using ATR-FTIR and machine learning
《环境科学与工程前沿(英文)》 2023年 第17卷 第10期 doi: 10.1007/s11783-023-1721-1
● A method based on ATR-FTIR and ML was developed to predict CHNS contents in waste.
关键词: Elemental composition Infrared spectroscopy Machine learning Moisture interference Solid waste Spectral noise
De-noising of diesel vibration signal using wavelet packet and singular value decomposition
DUAN Li-xiang, ZHANG Lai-bin, WANG Zhao-hui
《机械工程前沿(英文)》 2006年 第1卷 第4期 页码 443-447 doi: 10.1007/s11465-006-0055-6
关键词: coefficient de-noised cylinder signal-to-noise wavelet decomposition
Destructive and non-destructive evaluation of concrete for optimum sand to aggregate volume ratio
《结构与土木工程前沿(英文)》 2021年 第15卷 第6期 页码 1400-1414 doi: 10.1007/s11709-021-0779-8
关键词: aggregates non-destructive testing sand-to-aggregate volume ratio (s/a) maximum aggregate size (MAS)
Z干扰信道下非正则信号的最佳设计策略 Article
Dan LI, Shan WANG, Fang-lin GU
《信息与电子工程前沿(英文)》 2017年 第18卷 第11期 页码 1900-1912 doi: 10.1631/FITEE.1700030
标题 作者 时间 类型 操作
Adaptive robust beamformer formulti-pair two-way relay networks with imperfect channel state information
Jin WANG,Feng SHU,Ri-qing CHEN,Yu-di CUI,Yu CHEN,Jun LI
期刊论文
基于特征分析和最大信干噪比波束形成器的鲁棒广义旁瓣消除器
Quan-dong WANG, Liang-hao GUO, Wei-yu ZHANG, Sui-ling REN, Chao YAN
期刊论文
Target tracking methods based on a signal-to-noise ratio model
Dai Liu, Yong-bo Zhao, Zi-qiao Yuan, Jie-tao Li, Guo-ji Chen,ybzhao@xidian.edu.cn
期刊论文
High-order phase-field model with the local and second-order max-entropy approximants
Fatemeh AMIRI
期刊论文
Process improvement in laser hot wire cladding for martensitic stainless steel based on the Taguchi method
Zilin HUANG,Gang WANG,Shaopeng WEI,Changhong LI,Yiming RONG
期刊论文
Electromagnetic interference modeling and suppression techniques in variable-frequency drive systems
Le YANG, Shuo WANG, Jianghua FENG
期刊论文
Overlap maximum matching ratio (OMMR): a new measure to evaluate overlaps of essential modules
Xiao-xia ZHANG,Qiang-hua XIAO,Bin LI,Sai HU,Hui-jun XIONG,Bi-hai ZHAO
期刊论文
De-noising of diesel vibration signal using wavelet packet and singular value decomposition
DUAN Li-xiang, ZHANG Lai-bin, WANG Zhao-hui
期刊论文
Destructive and non-destructive evaluation of concrete for optimum sand to aggregate volume ratio
期刊论文