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基于二次聚类分割与Teager能量谱的滚动轴承微弱故障特征提取

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振动与冲击 2020年第13期39卷 246-253页

作者：王望望邓林峰赵荣珍张爱华兰州理工大学机电工程学院兰州730050 兰州理工大学电气工程与信息工程学院兰州730050

如何从含噪振动信号中准确提取微弱周期性故障特征是辨识滚动轴承局部故障的关键。针对此问题,提出一种基于二次聚类分割与Teager能量谱的滚动轴承微弱故障特征提取方法。首先通过傅里叶变换得到故障信号的频谱并利用模糊C均值算法对其... 详细信息

如何从含噪振动信号中准确提取微弱周期性故障特征是辨识滚动轴承局部故障的关键。针对此问题,提出一种基于二次聚类分割与Teager能量谱的滚动轴承微弱故障特征提取方法。首先通过傅里叶变换得到故障信号的频谱并利用模糊C均值算法对其进行聚类分割;然后对每个频段进行傅里叶逆变换并计算不同频段时域信号的峭度,选取峭度最大频段对应的时域信号作为滤波信号,对该信号进行第二次聚类分割及傅里叶逆变换,选取最大峭度对应的频段作为通带过滤信号,进一步消除噪声和自然周期性成分的影响;最后采用Teager能量算子对得到的时域故障信号进行解调分析,以获取滚动轴承微弱故障特征频率。仿真分析和实验验证结果表明,该方法能准确有效地提取出滚动轴承微弱故障特征。

关键词：二次聚类分割 Teager能量谱峭度滚动轴承故障特征提取

基于QPSO‐MPE的滚动轴承故障识别方法

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振动．测试与诊断 2021年第1期41卷 62-68,200,201页

作者：王望望邓林峰赵荣珍张爱华兰州理工大学机电工程学院兰州730050 兰州理工大学电气工程与信息工程学院兰州730050

为准确辨识滚动轴承故障类型,提出了一种基于量子粒子群优化多尺度排列熵(quantum⁃behaved particle swarm optimization and multi⁃scale permutation entropy,简称QPSO⁃MPE)的滚动轴承故障识别方法。首先,对滚动轴承的原始振动信号进... 详细信息

为准确辨识滚动轴承故障类型,提出了一种基于量子粒子群优化多尺度排列熵(quantum⁃behaved particle swarm optimization and multi⁃scale permutation entropy,简称QPSO⁃MPE)的滚动轴承故障识别方法。首先,对滚动轴承的原始振动信号进行集成经验模态分解(ensemble empirical mode decomposition,简称EEMD),得到一系列内禀模态分量(intrinsic mode function,简称IMF)和一个趋势项,并以峭度作为度量指标筛选出含有主要故障特征信息的IMF来重构振动信号;然后,利用量子粒子群优化算法对多尺度排列熵的关键参数进行优化,得到其模型计算重构信号的多尺度排列熵,从而构建轴承故障的多尺度排列熵特征集;最后,将故障特征集输入GG(Gath⁃Geva)模糊聚类算法进行聚类识别。实验结果表明,基于QPSO⁃MPE的滚动轴承故障识别方法可实现滚动轴承典型故障的准确辨识,证明了QPSO⁃MPE在故障特征提取方面的有效性。

关键词：滚动轴承故障识别量子粒子群优化多尺度排列熵集成经验模态分解 GG模糊聚类

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旺忘望作品

中国拍卖 2023年第2期 80-81页

作者：旺忘望不详

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物联网中融合网络流量的恶意软件检测

电子科技大学学报 2023年第4期52卷 602-609页

作者：张云春王旺旺李成杰廖梓琨封凡林英云南大学软件学院昆明650500

针对物联网基础设施、应用程序和终端设备的攻击显著增加,物联网中的代表性恶意软件以产生恶意流量为主。对基于恶意软件字节序列构建的MalConv模型进行改进,与基于恶意流量特征的Bi-LSTM模型进行融合,实现了适用于物联网终端设备恶意... 详细信息

针对物联网基础设施、应用程序和终端设备的攻击显著增加,物联网中的代表性恶意软件以产生恶意流量为主。对基于恶意软件字节序列构建的MalConv模型进行改进,与基于恶意流量特征的Bi-LSTM模型进行融合,实现了适用于物联网终端设备恶意软件检测的融合模型。实验结果表明,融合模型NT-MalConv具有更高的检测能力,检测准确率达95.17%;检测融合对抗样本时,NT-MalConv模型比MalConv改进模型的准确率提升了10.31%。

关键词：对抗攻击物联网恶意流量检测恶意软件检测模型融合

TSP隧道超前地质预报技术在宽大断层内部的应用

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工程地球物理学报 2021年第2期18卷 186-193页

作者：王汪汪牟元存中国中铁二院工程集团有限责任公司四川成都610031

当前借助隧道超前地质预报技术对小规模断层的探测及对断层破碎带范围界限的判定在业界已取得了一定的成果,但实际隧道工程中往往也面临着地质条件复杂多变的宽大断层,而在宽大断层内部准确开展超前地质预报探测是当前亟需进一步应用研... 详细信息

当前借助隧道超前地质预报技术对小规模断层的探测及对断层破碎带范围界限的判定在业界已取得了一定的成果,但实际隧道工程中往往也面临着地质条件复杂多变的宽大断层,而在宽大断层内部准确开展超前地质预报探测是当前亟需进一步应用研究的工作。本次研究采用TSP法(一种弹性波反射法)对宽大隧道断层内部的地质情况进行探测,通过资料处理、对比分析,最终取得了较好的探测效果,为相应隧道断层内部安全施工、优化施工方案提供了较好的指导和参考。本文TSP法在宽大断层内部探测的应用研究,也对其他类似地质条件下的预报工作有积极的指导意义。

关键词：超前地质预报隧道工程宽大断层内部 TSP

Dual modulation of homogeneous nanomaterialization and electrochemical activation enhancing zinc ion storage

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Science China Chemistry 2025年第1期68卷 385-393页

作者： Jianwei wang Huan wang Kangning wang Wenhui wang Wenlin Zhang Yanzhong Zhen School of Chemistry & Chemical Engineering Yan'an University

Vanadium-based electrode materials are widely investigated,but the low specific capacity and slow electrochemical kinetics in aqueous zinc-ion batteries still limit their commercial ***,the VS2/Ca V4O9material with the morphology of nanoflower was synthesized by a one-step hydrothermal *** to the blocky structure of pure VS2material,the VS2/Ca V4O9material is composed of thinner homogeneous *** open structures could provide abundant electrochemical active sites and ion transport channels,and then promote the electrochemical reaction *** addition,they can also buffer the bulk strain during the reaction *** improve the utilization of vanadium elements,an in-situ electrochemical activation strategy is used to explore the storage performance of the VS2/Ca V4O9material,the different activation voltage range of 0.4–1.6 and 0.4–1.4 V are selected,*** with the longer activation plateau of activated-VS2,the VS2/Ca V4O9cathode could quickly reach the activation state in the range of 1.4–1.6 V and cause the release of additional Zn storage sites *** VS2/Ca V4O9cathode delivers a higher power density of 37,000 W kg-1and a significant energy density of 423 Wh *** the high current density of 15 A g-1,the VS2/Ca V4O9cathode still has a discharge capacity of 183.9m Ah g-1after 5,000 cycles,and the capacity decay rate per cycle is only 0.0042%.Continuous cyclic voltammetry （CV） curves,electrochemical impedance spectroscopy （EIS） measurements,density functional theory （DFT） calculation and galvanostatic intermittent titration technique （GITT） measurements demonstrate that the VS2/Ca V4O9cathode has a faster ion diffusion/charge transfer ***,the assembled flexible device has an excellent mechanical stability.

关键词： dual modulation homogeneous nanomaterialization electrochemical activation zinc ion storage

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玄武岩隧道突涌地层段TSP法超前探测研究

工程地球物理学报 2021年第5期18卷 655-664页

作者：王汪汪牟元存王树栋中铁二院工程集团有限责任公司四川成都610031

我国西南地区广泛分布有与地幔柱作用相关的二叠系玄武岩,该地区地质条件复杂、构造发育,隧道施工过程中突泥涌水等地质灾害频发。玄武岩隧道突涌的诱因呈现多样性、复杂性,本次研究首先总结了玄武岩隧道发生突涌的各类地质特征;然后通... 详细信息

我国西南地区广泛分布有与地幔柱作用相关的二叠系玄武岩,该地区地质条件复杂、构造发育,隧道施工过程中突泥涌水等地质灾害频发。玄武岩隧道突涌的诱因呈现多样性、复杂性,本次研究首先总结了玄武岩隧道发生突涌的各类地质特征;然后通过工程实例分析研究TSP(地震波反射预报法)物性参数在突涌位置的变化特征。实例结果表明:隧道发生突涌位置附近横波速度下降,泊松比、纵横波速比明显上升,纵横波速比平均增加率在7%以上,泊松比平均增加率可达15%以上。本文TSP法对玄武岩隧道突涌的有效探测并提取出的参数变化规律,可为今后类似地质条件下的隧道超前地质预报工作提供积极的参考和借鉴。

关键词：玄武岩隧道突涌诱因 TSP 物性参数

Recent Progress on Zinc-Ion Rechargeable Batteries

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Nano-Micro Letters 2019年第4期11卷 575-604页

作者： wangwang Xu Ying wang Department of Mechanical and Industrial Engineering Louisiana State UniversityBaton RougeLA 70803USA

The increasing demands for environmentally friendly grid-scale electric energy storage devices with high energy density and low cost have stimulated the rapid development of various energy storage systems,due to the environmental pollution and energy crisis caused by traditional energy storage *** one of the new and most promising alternative energy storage technologies,zinc-ion rechargeable batteries have recently received much attention owing to their high abundance of zinc in natural resources,intrinsic safety,and cost effectiveness,when compared with the popular,but unsafe and expensive lithium-ion *** particular,the use of mild aqueous electrolytes in zinc-ion batteries(ZIBs)demonstrates high potential for portable electronic applications and large-scale energy storage ***,the development of superior electrolyte operating at either high temperature or subzero condition is crucial for practical applications of ZIBs in harsh environments,such as aerospace,airplanes,or ***,there are still many existing challenges that need to be *** paper presents a timely review on recent progresses and challenges in various cathode materials and electrolytes(aqueous,organic,and solid-state electrolytes)in *** and synthesis of zinc-based anode materials and separators are also briefly discussed.

关键词： Zinc-ion batteries Electrolyte Cathode Zinc anode Flexible device

An Iterated Greedy Algorithm with Memory and Learning Mechanisms for the Distributed Permutation Flow Shop Scheduling Problem

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Computers, Materials & Continua 2025年第1期82卷 371-388页

作者： Binhui wang Hongfeng wang College of Information Science and Engineering Northeastern UniversityShenyang110819China

The distributed permutation flow shop scheduling problem(DPFSP)has received increasing attention in recent *** iterated greedy algorithm(IGA)serves as a powerful optimizer for addressing such a problem because of its straightforward,single-solution evolution ***,a potential draw-back of IGA is the lack of utilization of historical information,which could lead to an imbalance between exploration and exploitation,especially in large-scale *** a consequence,this paper develops an IGA with memory and learning mechanisms(MLIGA)to efficiently solve the DPFSP targeted at the ***,we incorporate a memory mechanism to make a more informed selection of the initial solution at each stage of the search,by extending,reconstructing,and reinforcing the information from previous *** addition,we design a twolayer cooperative reinforcement learning approach to intelligently determine the key parameters of IGA and the operations of the memory ***,to ensure that the experience generated by each perturbation operator is fully learned and to reduce the prior parameters of MLIGA,a probability curve-based acceptance criterion is proposed by combining a cube root function with custom *** last,a discrete adaptive learning rate is employed to enhance the stability of the memory and *** ablation experiments are utilized to verify the effectiveness of the memory mechanism,and the results show that this mechanism is capable of improving the performance of IGA to a large ***,through comparative experiments involving MLIGA and five state-of-the-art algorithms on 720 benchmarks,we have discovered that MLI-GA demonstrates significant potential for solving large-scale *** indicates that MLIGA is well-suited for real-world distributed flow shop scheduling.

关键词： Distributed permutation flow shop scheduling makespan iterated greedy algorithm memory mechanism cooperative reinforcement learning