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Functional Optical Fiber Sensors Detecting Imperceptible Physical/Chemical Changes for Smart Batteries

Nano-Micro Letters 2024年第8期16卷 268-308页

作者： Yiding Li Li wang Youzhi Song wenwei wang Cheng Lin Xiangming He Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084People’s Republic of China National Engineering Research Center of Electric Vehicles Beijing Institute of Technology(BIT)Beijing 100081People’s Republic of China Shenzhen Automotive Research Institute of BIT(Shenzhen Research Institute of National Engineering Research Center of Electric Vehicles) Shenzhen 518118People’s Republic of China

The battery technology progress has been a contradictory process in which performance improvement and hidden risks *** the battery is still a“black box”,thus requiring a deep understanding of its internal *** battery should“sense its internal physical/chemical conditions”,which puts strict requirements on embedded sensing *** paper summarizes the application of advanced optical fiber sensors in lithium-ion batteries and energy storage technologies that may be mass deployed,focuses on the insights of advanced optical fiber sensors into the processes of one-dimensional nano-micro-level battery material structural phase transition,electrolyte degradation,electrode-electrolyte interface dynamics to three-dimensional macro-safety *** paper contributes to understanding how to use optical fiber sensors to achieve“real”and“embedded”*** the inherent advantages of the advanced optical fiber sensor,it helps clarify the battery internal state and reaction mechanism,aiding in the establishment of more detailed *** advancements can promote the development of smart batteries,with significant importance lying in essentially promoting the improvement of system ***,with the help of smart batteries in the future,the importance of consistency can be weakened or even *** application of advanced optical fiber sensors helps comprehensively improve the battery quality,reliability,and life.

关键词： Smart battery Advanced embedded optical fiber sensor Battery internal physical/chemical state Quality-reliability-life characteristic

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Lithological Facies Classification Using Attention-Based Gated Recurrent Unit

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Tsinghua Science and Technology 2024年第4期29卷 1206-1218页

作者： Yuwen Liu Yulan Zhang Xingyuan Mao Xucheng Zhou Jingwen Chang wenwei wang Pan wang Lianyong Qi College of Computer Science and Technology China University of Petroleum(East China)Qingdao 266580China Shandong Provincial University Laboratory for Protected Horticulture Weifang University of Science and TechnologyShouguang 262700China School of Mechanical Electrical and Information EngineeringShandong UniversityWeihai 264209China Shandong Provincial Key Laboratory of Network Based Intelligent Computing University of JinanJinan 250022China School of Modern Posts Nanjing University of Posts and TelecommunicationsNanjing 210023China

Lithological facies classification is a pivotal task in petroleum geology, underpinning reservoir characterization and influencing decision-making in exploration and production operations. Traditional classification methods, such as support vector machines and Gaussian process classifiers, often struggle with the complexity and nonlinearity of geological data, leading to suboptimal performance. Moreover, numerous prevalent approaches fail to adequately consider the inherent dependencies in the sequence of measurements from adjacent depths in a well. A novel approach leveraging an attention-based gated recurrent unit (AGRU) model is introduced in this paper to address these challenges. The AGRU model excels by exploiting the sequential nature of well-log data and capturing long-range dependencies through an attention mechanism. This model enables a flexible and context-dependent weighting of different parts of the sequence, enhancing the discernment of key features for classification. The proposed method was validated on two publicly available datasets. Results demonstrate a considerably improvement over traditional methods. Specifically, the AGRU model achieved superior performance metrics considering precision, recall, and F1-score.

关键词： attention mechanism facies classification GRU MLP(multilayer perceptron)

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Review of Electrical and Electronic Architectures for Autonomous Vehicles:Topologies,Networking and Simulators

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Automotive Innovation 2024年第1期7卷 82-101页

作者： wenwei wang Kaidi Guo Wanke Cao Hailong Zhu Jinrui Nan Lei Yu National Engineering Research Center of Electric Vehicles Beijing Institute of Technology(BIT)Beijing 100081China Shenzhen Automotive Research Institute Beijing Institute of Technology(BIT)Shenzhen 518000China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and TelecommunicationBeijing 100876China Purple Mountain Laboratories Nanjing 211111China Beijing Kawen New Energy Vehicle Co. LTDBeijing 102209China

With the rapid development of autonomous vehicles,more and more functions and computing requirements have led to the continuous centralization in the topology of electrical and electronic(E/E)*** certain Tier1 suppliers,such as BOSCH,have previously proposed a serial roadmap for E/E architecture development,implemented since 2015 with significant contributions to the automotive industry,lingering misconceptions and queries persist in actual engineering ***,there are concerns regarding the perspective of zone-oriented E/E architectures,characterized by zonal concentration,as successors to domain-oriented E/E architectures,known for functional *** these misconceptions and queries,this study introduces a novel parallel roadmap for E/E architecture development,concurrently evaluating domain-oriented and zone-oriented ***,the study explores hybrid E/E architectures,amalgamating features from both *** align with the evolution of E/E architectures,networking technologies must adapt *** networking mechanisms pivotal in E/E architecture design are comprehensively ***,the study delves into modeling and verification tools pertinent to E/E architecture *** conclusion,the paper outlines existing challenges and unresolved queries in this domain.

关键词： Autonomous vehicles Electrical and electronic architectures Topology Networking Domain-oriented Zone-oriented

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DI-VTR:Dual inter-modal interaction model for video-text retrieval

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Journal of Information and Intelligence 2024年第5期2卷 388-403页

作者： Jie Guo Mengying wang wenwei wang Yan Zhou Bin Song State Key Laboratory of Integrated Services Networks Xidian UniversityXian 710071China Hangzhou Institute of Technology Xidian UniversityHangzhou 311231China

Video-text retrieval is a challenging task for multimodal information processing due to the semantic gap between different ***,most existing methods do not fully mine the intra-modal interactions,as with the temporal correlation of video frames,which results in poor matching ***,the imbalanced semantic information between videos and texts also leads to difficulty in the alignment of the two *** this end,we propose a dual inter-modal interaction network for video-text retrieval,i.e.,*** learn the intra-modal interaction of video frames,we design a contextual-related video encoder to obtain more fine-grained content-oriented video *** also propose a dual inter-modal interaction module to accomplish accurate multilingual alignment between the video and text modalities by introducing multilingual text to improve the representation ability of text semantic *** experimental results on commonly-used video-text retrieval datasets,including MSR-VTT,MSVD and VATEX,show that the proposed method achieves significantly improved performance compared with state-of-the-art methods.

关键词： Video-text retrieval Multilingual text Dual interaction Contrastivelanguage-image pretraining(CLIP) Cross-modal retrieval

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基于Arduino的SMA丝材智能修复损伤钢筋混凝土梁试验研究

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桥梁建设 2024年第1期54卷 61-67页

作者：何初生王文炜姜进科张吴桐东南大学交通学院江苏南京210096

为修复钢筋混凝土梁在使用阶段中由于材料老化、裂缝开展等原因造成的损伤,提出一种基于Arduino智能平台和形状记忆合金(Shape Memory Alloy,SMA,具有形状记忆效应和超弹性特性)的智能修复控制系统,根据挠度及裂缝控制原理,设计智能修... 详细信息

为修复钢筋混凝土梁在使用阶段中由于材料老化、裂缝开展等原因造成的损伤,提出一种基于Arduino智能平台和形状记忆合金(Shape Memory Alloy,SMA,具有形状记忆效应和超弹性特性)的智能修复控制系统,根据挠度及裂缝控制原理,设计智能修复控制装置。该装置由输入模块、处理模块和输出模块组成,当检测到钢筋应变超过限值时,输出模块升高SMA丝材温度对梁体进行修复。为验证该智能修复装置的修复性能,设计对比梁A(无修复装置)与试验梁B(加装智能修复控制装置),在加载过程中对试验梁B进行3次修复,对2根梁的跨中挠度、钢筋应变及裂缝宽度等进行对比分析。结果表明:破坏时试验梁B的跨中挠度、裂缝宽度均小于对比梁A,并且在3次修复中试验梁B的跨中挠度、裂缝宽度和钢筋应变最大回复率分别为31.0%、47.0%和71.5%。说明该智能修复控制装置可以监测试验梁受损情况并激发SMA材料对试验梁实施修复,实现钢筋混凝土梁的智能修复。

关键词：钢筋混凝土梁形状记忆合金智能修复控制系统回复性跨中挠度钢筋应变模型试验

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当代腾冲翡翠玉雕工艺的传承与发展路向研究

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宝石和宝石学杂志（中英文） 2024年第1期26卷 76-87页

作者：王文薇卢靭尹作为中国地质大学(武汉)珠宝学院湖北武汉430074 湖北省人文社科研究基地“珠宝首饰传承与创新发展研究中心” 湖北武汉430074 滇西应用技术大学珠宝学院云南腾冲679100

腾冲翡翠玉雕作为国家级非物质文化遗产,不仅是腾冲文化基因的代表,也是中华优秀传统玉文化的重要组成部分。本文通过对腾冲翡翠玉雕加工基地和玉雕非遗传承人进行实地考察,总结归纳了腾冲翡翠玉雕目前存在的困境;同时,以传承发展为主线... 详细信息

腾冲翡翠玉雕作为国家级非物质文化遗产,不仅是腾冲文化基因的代表,也是中华优秀传统玉文化的重要组成部分。本文通过对腾冲翡翠玉雕加工基地和玉雕非遗传承人进行实地考察,总结归纳了腾冲翡翠玉雕目前存在的困境;同时,以传承发展为主线,重点从传统工艺理念的传承与创新,工艺传承队伍的科学构建,地域非遗文化品牌的塑造,多元媒介的动态展示与传播,国际化的交流与互鉴等五个维度对腾冲翡翠玉雕的传承与发展路向展开探讨,以期在当今非遗语境中对区域性玉雕工艺的可持续发展提供有效的参考与范式。

关键词：腾冲翡翠玉雕工艺传承发展路向非物质文化遗产

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气候冲击下金融风险的研究进展和展望——基于物理风险和转型风险视角

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金融经济 2024年第4期 34-51页

作者：王文蔚中国人民银行金融研究所

本文从物理风险和转型风险两个视角综述了近年来关于气候风险对经济和金融体系影响的研究进展。在宏观经济层面,气候风险对经济增长和波动的影响显著。物理风险通过减少资本积累、降低劳动生产率,对经济增长产生负面影响;转型风险在短... 详细信息

本文从物理风险和转型风险两个视角综述了近年来关于气候风险对经济和金融体系影响的研究进展。在宏观经济层面,气候风险对经济增长和波动的影响显著。物理风险通过减少资本积累、降低劳动生产率,对经济增长产生负面影响;转型风险在短期内抑制经济产出和就业,但长期内通过推动低碳技术进步,有助于提升经济效率和产出。在微观经济层面,气候风险对企业生产经营和财务决策的影响广泛。气候物理风险可能导致企业市场估值下降、成本增加和盈利能力减弱;转型风险则通过影响企业融资成本和资产估值,形成“碳泡沫”并引发金融风险。金融机构方面,银行、保险和资管行业需在现有风险管理体系中纳入气候风险因素,以应对潜在的金融不稳定性。研究表明,气候风险敞口对金融机构资产负债表和经营稳定性构成重要威胁。在梳理现有文献的基础上,本文提出了多角度的气候风险测度方法,并探讨了气候风险对宏观经济波动、微观企业生产经营及金融机构稳定性的影响,最后对未来研究方向进行了展望。本文为进一步研究气候风险及其经济金融影响提供了有益的理论基础和实践参考。

关键词：气候物理风险气候转型风险经济增长金融稳定低碳转型环境规制灾害经济学气候政策

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厚松散层薄基岩下分层开采覆岩破坏高度研究

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煤炭工程 2024年第5期56卷 75-83页

作者：王文卫芦晓伟丁坤朋王文焦作煤业集团赵固(新乡)能源有限责任公司河南新乡453000 中国矿业大学安全工程学院江苏徐州221116 河南理工产业技术研究院有限公司河南焦作454000 河南理工大学能源科学与工程学院河南焦作454000

以赵固一矿厚松散层薄基岩下分层工作面为研究对象,采用理论分析、数值模拟研究、钻孔冲洗液漏失量观测及钻孔窥视方法对采后覆岩破坏高度进行研究,研究表明:采用经验公式计算得到下分层工作面采后,顶板垮落带发育高度为6.93~27.72 m,... 详细信息

以赵固一矿厚松散层薄基岩下分层工作面为研究对象,采用理论分析、数值模拟研究、钻孔冲洗液漏失量观测及钻孔窥视方法对采后覆岩破坏高度进行研究,研究表明:采用经验公式计算得到下分层工作面采后,顶板垮落带发育高度为6.93~27.72 m,导水裂缝带发育高度为22.17~71.73 m;数值模拟结果表明下分层采高2.5 m、累计采高6 m时,最大垮采比为2.61,而累计采厚小于6 m、基岩厚度不小于30 m、黏土层厚度大于5 m时可认为黏土层厚度能够阻隔导水裂缝带向上发育;采用现场实测方法得到累计采厚5.8 m处,垮落带15.26 m,垮采比为2.62,导水裂缝带55.59 m,裂采比为9.58。东一盘区下分层工作面后开采覆岩破坏高度的规律,可以为该矿下分层工作面时确定防水、防砂安全煤(岩)柱厚度提供理论依据。

关键词：厚松散层薄基岩垮落带导水裂隙带下分层

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Mass‑Spring‑Damping Theory Based Equivalent Mechanical Model for Cylindrical Lithium‑ion Batteries under Mechanical Abuse

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Chinese Journal of Mechanical Engineering 2020年第2期33卷 161-174页

作者： wenwei wang Yiding Li Cheng Lin Sheng Yang National Engineering Laboratory for Electric Vehicles Beijing Institute of TechnologyBeijing 100081China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing Institute of TechnologyBeijing 100081China

An equivalent mechanical model with the equivalent physical meaning of mass-spring-damping is proposed for cylindrical lithium-ion batteries through experiments and *** equivalent mechanical model of a cylindrical lithium-ion battery consists of a spring-damping parallel ***,a spring-damping parallel unit connecting a damping unit in series is selected to construct the constitutive characteristics of the battery under mechanical *** results show that the equivalent mechanical model can more effectively describe the mechanical properties of the batteries than most cubic fitting models,of which the average relative error of the equivalent mechanical model under different states-of-charge is less than 6.75%.Combined with the proposed equivalent mechanical model,the failure process of the batteries was simulated and analyzed using LS-Dyna and *** rigid rod tests,failure occurred at the core and bottom of the batteries;under hemispherical punch tests,failure occurred at the core and top,consistent with the experimental *** average prediction error for the failure displacement under different abuse conditions is less than 4%in the *** equivalent mechanical model requires only a few parameters and can be recognized *** the future,the model can be used in safety warning devices based on mechanical penetration.

关键词： Cylindrical lithium-ion battery Mass-spring-damping theory Equivalent mechanical model Mechanical abuse condition Failure analysis

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深部煤系储层缝间干扰多裂缝同步扩展规律试验研究

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矿业安全与环保 2024年第2期51卷 74-81,89页

作者：陈志杰王开张小强姜玉龙丁一侯建王文伟太原理工大学矿业工程学院山西太原030024

为研究深部煤系储层缝间干扰多裂缝同步扩展规律,采用自行研制的TCHFSM-I型大尺寸真三轴压裂渗流模拟装置,开展不同压裂孔间距、不同注液速率对多裂缝同步扩展规律的影响试验。通过观察和分析压裂过程中裂缝扩展形态、注液压力演化规律... 详细信息

为研究深部煤系储层缝间干扰多裂缝同步扩展规律,采用自行研制的TCHFSM-I型大尺寸真三轴压裂渗流模拟装置,开展不同压裂孔间距、不同注液速率对多裂缝同步扩展规律的影响试验。通过观察和分析压裂过程中裂缝扩展形态、注液压力演化规律,以及声发射动态响应特征和注液流量演化特征,结果表明:压裂孔间距较小时,左右两侧裂缝扩展长度大于中部裂缝,随着压裂孔间距增大,左中右3条裂缝均衡扩展;增大注液速率可以使起裂压力增高,多裂缝长度增加,有效提高储层改造体积;增大压裂孔间距和注液速率,可以使左中右3个压裂孔的注液流量占比更均衡。

关键词：深部煤系多孔水力压裂缝间应力干扰压裂孔间距注液速率声发射特征流量演化规律

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