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Tool State Detection by Harmonic Wavelet and Sample Entropy

Chinese Journal of Mechanical Engineering 2011年第6期24卷 1068-1073页

作者： song wanqing ZHANG Jing College of Electronic and Electrical Engineering Shanghai University of Engineering ScienceShanghai 201620China

It is a fact that acoustic emission(AE) signals contain potentially valuable information for tool wear and breakage monitoring and ***,AE stress waves produced in the cutting zone are distorted by the transmission path and the measurement systems,it is difficult to obtain a reliable result by these raw AE *** is generally known that the process of tool wear belongs to detect weak singularity signals in strong *** objective of this paper is to combine Newland Harmonic wavelet and Richman-Moorman(2000) sample entropy for detecting weak singularity signals embedded in strong ***,the raw AE signal is decomposed by harmonic wavelet and transformed into the three-dimensional time-frequency mesh map of the harmonic wavelet,at the same time,the contours of the mesh map with log space is ***,the profile map of the three-dimensional time-frequency mesh map is offered,which corresponds to decomposed level on harmonic ***,by computing sample entropy in each level,the weak singularity signal can be easily extracted from strong *** test was carried out on HL-32 NC turning *** lathe does not have a *** carbide finishing tool was used to turn free machining mild *** work material was chosen for ease of machining,allowing for generation of surfaces of varying quality without the use of cutting *** turning experiments,the feasibility for tool condition monitoring is demonstrated by 27 kinds of cutting conditions with the sharp tool and the worn tool,54 group data are sampled by *** sample entropy of each level of wavelet decomposed for each one of 54 AE datum is computed,wear tool and shaper tool can be distinguished obviously by the sample entropy value at the 12th level,this is a *** proposed research provides a new theoretical basis and a new engineering application on the tool condition monitoring.

关键词： tool wear harmonic wavelet sample entropy

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A comprehensive overview of the electrochemical mechanisms in emerging alkali metal-carbon dioxide batteries

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Carbon Energy 2023年第5期5卷 78-114页

作者： Jiangfeng Lin wanqing song Caixia Xiao Jingnan Ding Zechuan Huang Cheng Zhong Jia Ding Wenbin Hu Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education) School of Materials Science and EngineeringTianjin UniversityTianjinChina Joint School of National University of Singapore and Tianjin University International Campus of Tianjin UniversityBinhai New CityFuzhouChina

Alkali metal-carbon dioxide(Li/Na/K-CO_(2))batteries are emerging electrochemical energy storage technologies in the context of the energy crisis and the urgent demand for carbon *** metal-CO_(2) batteries offer a new strategy for CO_(2) fixation and utilization,and thus has been receiving considerable attention in recent *** progress has been achieved since alkali metal-CO_(2) batteries were invented,especially in terms of development of new electrode materials,and yet,research is lacking on the underlying mechanisms of the *** is the first typical review focusing on the electrochemical mechanisms of metal-CO_(2) batteries that summarizes the current understanding of and provides insights into the thermodynamic reaction pathways,the kinetic characteristics,and the crucial factors determining the reaction mechanisms in alkali metal-CO_(2) *** review starts with the fundamental concepts of alkali metal-CO_(2) batteries,followed by a comprehensive discussion of the working mechanisms on cathodes and ***,the operation mechanisms of state-of-the-art electrolytes,including liquid and(quasi-)solid-state electrolytes,are also ***,we identify the unsolved problems in current alkali metal-CO_(2) batteries and propose potential topics for future research.

关键词： alkali metal anodes CO_(2)reduction reaction electrochemical mechanism Li-CO_(2)battery Na-CO_(2)battery

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Characterization and Phylogenetic Implications of the Complete Mitogenomes of Two Species in the Genus Zhangixalus(Anura:Rhacophoridae)

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Asian Herpetological Research 2023年第3期14卷 191-211页

作者： Lichun JIANG wanqing song Yujia LIU Yujie ZHANG Jingfeng LIU Chunxiu LIU Xiaodong JIA Wei CHEN Ecological Security and Protection Key Laboratory of Sichuan Province Mianyang Normal UniversityMianyang 621000SichuanChina Key Laboratory for Molecular Biology and Biopharmaceutics School of Life Science and TechnologyMianyang Normal UniversityMianyang 621000SichuanChina School of Resources and Environmental Engineering Anhui UniversityHefei 230601AnhuiChina

Mitochondrial genomes(mitogenomes)in frogs are essential for reconstructing the phylogenetic relationships and shedding light on the molecular evolution in these ***,there are only seven complete Rhacophoridae genomes that have been reported to *** this paper,two complete mitogenomes of the Chinese whipping frog(Zhangixalus chenfui)and Emei tree frog(***)were described,each of which was 20520 and 19782 bp in size,and had A+T contents of 64.26%and 63.83%.The two mitogenomes each included two non-coding control region(D-loop,CR),two ribosomal RNA genes(rRNAs),13 protein-coding genes(PCGs),and 22 transfer RNA genes(tRNAs),and it was found that the mitogenome of *** also includes three tandem tRNAMet gene sequences.A typical clover-leaf structure was found for all tRNAs except for tRNASer1(AGN),which showed a reduced DHU *** putative D-loop region contains multiple types of tandem repeats *** of these two mitogenomes showed similar pattern of gene rearrangement(tRNA-Ser-ND6-tRNA-Glu-CytbCR1-ND5-CR2-tRNA-Thr-tRNA-Leu-tRNA-Pro).Additionally,three consecutive tRNAMet genes were found for the first time in ***,a species in the Rhacophoridae *** all phylogenetic analyses,which were based on 13 protein-coding genes from 91 Ranoidea mitogenomes,the same phylogenetic trees were observed using either maximum likelihood or Bayesian *** results suggest that the phylogenetic hypotheses for the Ranoidea(including Rhacophoridae,Mantellidae,Ranidae and Dicroglossidae)derived from these mitogenomic data could provide substantiation for the relationships of(Dicroglossidae(Ranidae,(Mantellidae,Rhacophoridae))),and support the presence of a monophyletic group in four ***,*** and *** were found to cluster on the same branch,indicating that they were more closely related as a *** group may in turn form sister groups with *** and ***,*** is located on the ba

关键词： mitochondrial genome Phylogeny Ranoidea Rhacophoridae Zhangixalus chenfui Z.omeimontis

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Identifying Heteroatomic and Defective Sites in Carbon with Dual-Ion Adsorption Capability for High Energy and Power Zinc Ion Capacitor

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Nano-Micro Letters 2021年第4期13卷 58-75页

作者： Wenjie Fan Jia Ding Jingnan Ding Yulong Zheng wanqing song Jiangfeng Lin Caixia Xiao Cheng Zhong Huanlei Wang Wenbin Hu Key Laboratory of Advanced Ceramics and Machining Technology(Ministry of Education) School of Materials Science and EngineeringTianjin UniversityTianjin 300072People’s Republic of China School of Materials Science and Engineering Ocean University of ChinaQingdao 266100People’s Republic of China

Aqueous zinc-based batteries(AZB s)attract tremendous attention due to the abundant and rechargeable zinc ***,the requirement of high energy and power densities raises great challenge for the cathode *** we construct an aqueous zinc ion capacitor possessing an unrivaled combination of high energy and power characteristics by employing a unique dual-ion adsorption mechanism in the cathode *** a templating/activating co-assisted carbonization procedure,a routine protein-rich biomass transforms into defect-rich carbon with immense surface area of 3657.5 m^(2) g^(-1) and electrochemically active heteroatom content of 8.0 at%.Comprehensive characterization and DFT calculations reveal that the obtained carbon cathode exhibits capacitive charge adsorptions toward both the cations and anions,which regularly occur at the specific sites of heteroatom moieties and lattice defects upon different depths of discharge/*** dual-ion adsorption mechanism endows the assembled cells with maximum capacity of 257 mAh g^(-1) and retention of72 mAh g^(-1) at ultrahigh current density of 100 A g^(-1)(400 C),corresponding to the outstanding energy and power of 168 Wh kg^(-1)and 61,700 W kg^(-1).Furthermore,practical battery configurations of solid-state pouch and cable-type cells display excellent reliability in electrochemistry as flexible and knittable power sources.

关键词： Aqueous zinc ion capacitor Dual-ion adsorption Charge storage mechanism High energy and power Flexible and knittable devices

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An all optical fiber gas sensor of NH3 and CO based on based on the spectral absorption and harmonic detection

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International English Education Research 2014年第12期 100-103页

作者： Liu Jin Yang Haima Yan Chaochao song wanqing College of Electronic and Electrical Engineering Shanghai University of Engineering Science Shanghai 201620 China School of Optical-Eleclrical and Computer Engineering University of Shanghai for Science and Technology Shanghai 200093 China

An all optical fiber gas sensor is presented to detect the concentration of NH3 and CO. Based on the spectral absorption, The wideband light source is used to reflect two narrowband spectra by fiber grating of different duty. and piezoelectric ceramics to obtain narrowband output light. The high sensitivity detection can be measured from the second harmonic signal. The two narrowband spectra are corresponding to the absorption spectra of NH3 and CO. Concentration detection are realized by the detection of variety of light intensity. Sensitivity is proved and cost is reduced.

关键词： Distribution Optical fiber sensor Concentration detection

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LMD与非凸罚最小化L_q正则子压缩传感的轴承振动信号重建

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中南大学学报（自然科学版） 2015年第10期46卷 3696-3702页

作者：李庆宋万清上海工程技术大学电子电气工程学院上海201620

针对机械振动信号高速传输、大容量长期实时存储问题,提出一种局部均值分解(LMD)与非凸罚最小化Lq正则子压缩传感(CS)相结合的轴承故障振动信号重建方法。该方法利用振动系统信号采样、压缩合并进行的思想,首先通过LMD把振动信号分解为... 详细信息

针对机械振动信号高速传输、大容量长期实时存储问题,提出一种局部均值分解(LMD)与非凸罚最小化Lq正则子压缩传感(CS)相结合的轴承故障振动信号重建方法。该方法利用振动系统信号采样、压缩合并进行的思想,首先通过LMD把振动信号分解为若干个不同频率分量的乘积函数平稳信号,对不同的频段分量寻求最佳的稀疏基,构建基于随机高斯矩阵的高度欠定方程;然后求解合适的压缩比,应用非凸罚最小化Lq正则子(q=0.5)算法重构,对所有重构信号组合得到原始振动信号。研究结果表明:LMD与非凸罚最小化Lq正则子压缩传感相结合的方法提高了轴承振动信号的重构精度,降低了重构计算复杂度,具有更高的处理速度和运行效率。

关键词：局部均值分解非凸罚最小化Lq 压缩传感振动信号信号重建

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聚合装置出料泵变频调速系统的增容改造

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工程塑料应用 2007年第6期35卷 64-67页

作者：宋万清徐刚上海工程技术大学电子电气工程学院上海201620 江苏仪征化纤集团公司工程塑料厂扬州211900

总结了聚合装置出料泵变频调速控制系统增加熔体过滤器之后能提高产品质量、产能可提高到120%、并能在满负荷下长时间稳定运行的增容改造情况。重点介绍了控制系统主电路和控制电路的设计、电机和变频器的选型、变频器的安装与调试过程... 详细信息

总结了聚合装置出料泵变频调速控制系统增加熔体过滤器之后能提高产品质量、产能可提高到120%、并能在满负荷下长时间稳定运行的增容改造情况。重点介绍了控制系统主电路和控制电路的设计、电机和变频器的选型、变频器的安装与调试过程,并对如何提高变频器抗电网波动能力进行了探讨。

关键词：聚合装置变频器变频电机齿轮泵增容改造

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内河小型LNG船碰撞结构损伤数值研究

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中国航海 2017年第2期40卷 88-92页

作者：窦旭吴宛青宋明大连海事大学轮机工程学院辽宁大连116026

对小型液化天燃气(Liquefied Natural Gas,LNG)船在内河航行过程中发生碰撞造成的结构损伤进行数值研究。以内河小型LNG船为目标船,以典型的散货船为撞击船,在Solidworks软件中完成几何建模,在有限元软件ANSYS中进行船舶碰撞数值计算。... 详细信息

对小型液化天燃气(Liquefied Natural Gas,LNG)船在内河航行过程中发生碰撞造成的结构损伤进行数值研究。以内河小型LNG船为目标船,以典型的散货船为撞击船,在Solidworks软件中完成几何建模,在有限元软件ANSYS中进行船舶碰撞数值计算。采用均匀设计法确定计算方案,通过回归分析处理所得数据,得到被撞船的内壳、外壳破裂临界撞击速度经验公式。利用该研究成果,可针对内河不同尺度的LNG船遇到不同吨级散货船时的情况,进行相应的航速安全管理,以便在不采用移动安全区的情况下有效控制LNG船在内河营运过程中的整体风险。

关键词：船舶碰撞结构损伤数值模拟回归分析

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基于波矢可调谐对称结构的条波导型SPR传感系统研究

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传感技术学报 2016年第2期29卷 188-194页

作者：刘瑾杨海马宋万清上海工程技术大学电子电气工程学院上海201620 上海理工大学光电信息与计算机工程学院上海200093

针对目前波导型SPR传感器波矢匹配条件受限及较难与光纤实现固化对接进而实现在线传感的缺点,研究由条波导激励对称结构的SPR传感系统。通过对由金属——介质——金属构成的对称结构进行模式分析,研究可在该结构内激发SPW的可能性及其... 详细信息

针对目前波导型SPR传感器波矢匹配条件受限及较难与光纤实现固化对接进而实现在线传感的缺点,研究由条波导激励对称结构的SPR传感系统。通过对由金属——介质——金属构成的对称结构进行模式分析,研究可在该结构内激发SPW的可能性及其波矢可调谐机制。实验制备单模条波导并激励对称传感结构,对比了条波导激励传统结构与对称结构的检测折射率范围,研究了对称结构中金属材质,金属膜厚及介质厚度对测量结果的影响,给出了折射率测量的结果,实验证明,采用对称结构实现传感,可通过镀金属膜的厚度来改善传感特性,调节两金属膜之间介质的厚度可以实现波矢匹配的调节,进而使得被测范围具有一定的可调性,具有较好的线性。

关键词： SPR 对称传感结构调谐机制波矢匹配

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经验模态分解与EOSA方法的滚动轴承故障诊断

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计算机测量与控制 2014年第4期22卷 1006-1008页

作者：李庆宋万清上海工程技术大学电子电气工程学院上海201620

提出了一种利用经验模态分解(EMD)与Teager能量算子解调算法(EOSA)相结合的滚动轴承故障诊断方法;故障轴承振动信号往往是多分量AM-FM信号,首先对滚动轴承内圈故障调制信号进行EMD分解,得到若干个不同特征时间尺度的内禀模态信号(IMF),... 详细信息

提出了一种利用经验模态分解(EMD)与Teager能量算子解调算法(EOSA)相结合的滚动轴承故障诊断方法;故障轴承振动信号往往是多分量AM-FM信号,首先对滚动轴承内圈故障调制信号进行EMD分解,得到若干个不同特征时间尺度的内禀模态信号(IMF),然后利用Teager能量算子解调法计算各个内禀模态信号的瞬时幅值,对主要内禀模态信号的瞬时幅值包络谱进行分析,可提取轴承故障信号特征信息;实验分析结果表明,利用经验模态分解与EOSA相结合的方法,可有效提取6205-2RS型深沟球滚动轴承的内圈特征频率fi=162.2Hz及其倍频。

关键词：经验模态分解 Teager能量算子解调法滚动轴承包络谱

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