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Effect of preload forces on multidimensional signal dynamic behaviours for battery early safety warning

Journal of Energy Chemistry 2024年第5期92卷 484-498页

作者： Kuijie li jiahua li Xinlei Gao Yao Lu Depeng Wang Weixin Zhang Weixiong Wu Xuebing Han Yuan-cheng Cao Languang Lu Jinyu Wen Shijie Cheng Minggao Ouyang School of Electrical and Electronic Engineering Huazhong University of Science and TechnologyWuhan 430074HubeiChina State Key Laboratory of Automotive Safety and Energy Tsinghua UniversityBeijing 100084China Energy and Electricity Research Center Jinan UniversityZhuhai 519070GuangdongChina Department of Mechanical Engineering Imperial College LondonLondon.SW7:2AZ.UK

Providing early safety warning for batteries in real-world applications is challenging.In this study,comprehensive thermal abuse experiments are conducted to clarify the multidimensional signal evolution of battery failure under various preload forces.The time-sequence relationship among expansion force,voltage,and temperature during thermal abuse under five categorised stages is revealed.Three characteristic peaks are identified for the expansion force,which correspond to venting,internal short-circuiting,and thermal runaway.In particular,an abnormal expansion force signal can be detected at temperatures as low as 42.4°C,followed by battery thermal runaway in approximately 6.5 min.Moreover,reducing the preload force can improve the effectiveness of the early-warning method via the expansion force.Specifically,reducing the preload force from 6000 to 1000 N prolongs the warning time(i.e.,227 to 398 s)before thermal runaway is triggered.Based on the results,a notable expansion force early-warning method is proposed that can successfully enable early safety warning approximately 375 s ahead of battery thermal runaway and effectively prevent failure propagation with module validation.This study provides a practical reference for the development of timely and accurate early-warning strategies as well as guidance for the design of safer battery systems.

关键词： lithium-ion battery Thermal runaway Preload force Expansionforce Early warning Multidimensional signal

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Molar-Tooth Structure from the Mesoproterozoic Wumishan Formation in lingyuan,Yanshan Region,North China,and Geological Implications

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Acta Geologica Sinica(English Edition) 2012年第1期86卷 85-95页

作者： KUANG Hongwei liU Yongqing PENG Nan LUO Shunshe li jiahua CEN Chao CHEN Mingpei Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Key Laboratory of Exploration Technologies for Oil and Gas Resources Ministry of Education of China School of Geophysics and Oil Resources of Yangtze University JingzhouHubei 434023China China University ofGeosciences Beijing 100083China School of Geosciences of Yangtze University Jingzhou Hubei 434023China

Although its origin has not yet reached a consensus so far, MTS （Molar-Tooth Structure） has been documented for more than 100 years. Current study reports a discovery of MTS from the Mesoproterozoic Wumishan Formation, lingyuan, Yanshan Region, North China, and the features and geological implications of MTS are further discussed. Here, straitigraphic horizons of MTS＇s occurrences show that it was mainly located within the top part of the Wumishan Formation, i.e., limestone unit. Four kinds of morphology of MTS, i.e., fine fusiform, debris, ribbon, ptigmatic and nodular （irregular）, were recognized and thought to be highly related to the sedimentary environments and facies. Geochemistry of MTS including oxides, trace elements and C, O and Sr isotopes indicates that the horizons of MTS-bearing is of higher Sr/Ba and Ca/Mg ratios, lower positive ~13C and highly negative 3180 values than the adjacent stratigraphic levels of rare MTS. lithology, morphology and geochemistry of MTS in the Wumishan Formation suggest that MTS occurs mainly in shallow subtidal near the storm wave base, which is typically characterized by warm temperature, oversaturated calcium carbonate seawater and high organic productivity. Furthermore, occasional enrichment of algae bacteria here is more favorable for the calcification of calcium oozes and catalytic for MTS. C isotope composition of the Wumishan Formation and MTS of this study is well correlated with that of the Mesoproterozoic Belt Supergroup, North America and Riphean, Siberia, suggesting that MTS acts as a sedimentary record responding to global changes and is a perfect indicator in Precambrian stratigraphic correlation worldwide.

关键词： Molar-tooth Structure Wumishan Formation Mesoproterozoic Implications lingyuan Yanshan Region

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Genome-wide identification and prediction of long noncoding RNAs in half-smooth tongue sole Cynoglossus semilaevis

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Journal of Oceanology and limnology 2020年第1期38卷 226-235页

作者： JIANG Xiaoli JING Xiaohong LÜ Yan SHAN Changmin li jiahua YU Yan WU Yuyong SUN Yeying College of Pharmacy Binzhou Medical UniversityYantai 264003China College of life Science Yantai UniversityYantai 264005China

At present,the function and profile of long noncoding RNAs(lncRNAs)in half-smooth tongue soles Cynoglossus semilaevis remain poorly understood.Therefore,we identified lncRNAs in the species using large-scale deep sequencing approaches.A total of 96726222 clean reads and 2497 lncRNAs were obtained from the compound samples.In total,1694 known lncRNAs and 803 novel lncRNAs were identified.Most of the novel lncRNAs distributed mainly in a range of 200-3000 nt and contained 2-6 exons.Six novel lncRNAs were selected for expression analysis by quantitative reverse transcription-polymerase chain reaction,of which lnc_770 and lnc_150 were expressed mainly in the ovary.This study provides a valuable resource for lncRNA studies of half-smooth tongue sole and improves our understanding of the function of non-coding RNA in fish.

关键词： Cynoglossus semilaevis long noncoding RNAs(lncRNAs) expression profiles

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古典秩序下的中华巴洛克建筑立面构图研究——以哈尔滨为例

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华中建筑 2024年第7期42卷 1-5页

作者：陈萌李家华哈尔滨工业大学建筑与设计学院寒地城乡人居环境科学与技术工业和信息化部重点实验室

中华巴洛克是在西方巴洛克风格基础上融入中国传统文化而产生的一种近代折衷主义建筑风格,具有重要的历史价值和人文价值。以哈尔滨中华巴洛克建筑立面为研究对象,系统梳理其立面构图特征,分析中华巴洛克与西方古典主义建筑的源流关系... 详细信息

中华巴洛克是在西方巴洛克风格基础上融入中国传统文化而产生的一种近代折衷主义建筑风格,具有重要的历史价值和人文价值。以哈尔滨中华巴洛克建筑立面为研究对象,系统梳理其立面构图特征,分析中华巴洛克与西方古典主义建筑的源流关系。并从法式、属群、均衡三个古典构图原则入手,对具有代表性的建筑立面进行解构分析,总结中华巴洛克建筑立面的古典主义构图规律。完善中华巴洛克建筑遗产理论体系,为中华巴洛克的文物保护修缮提供理论指导。

关键词：古典秩序中华巴洛克建筑立面构图哈尔滨

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Planning of R & D Industrial Parks Under the Civil-Military Integration Strategy

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Journal of Landscape Research 2019年第1期11卷 24-28页

作者： CHE Lu li jiahua Southwest University of Science and Technology

The construction of industrial parks under the civil-military integration strategy is based on the combination of military technology and civil technology. Such an industrial park is a new urban functional area produced in the context of civil-military integration. Compared with industrial parks in the usual sense, it pays more attenteon to scientific research, innovation, cooperation and communication. In this paper, through in-depth analyses of relevant literature and domestic actual situation, the industrial park's basic advantages and external environmental policies were interpreted, and the application prospect and practical significance of the current civil-military integration policy were analyzed based on the platform strategy of the civil-military integration industrial park. With R & D industrial parks as the object of study, this paper clarified the management of enterprises in this type of parks and the support provided by the parks, sorted out the industrial park planning plan under the civil-military integration strategy in accordance with the current economic situation and policy orientation, and finally reached the conclusion that the construction of the construction of R & D industrial parks under the civil-military integration strategy is a new growth point that will drive the deepening reform of the national economy and the sustained development of the national economy.

关键词： Civil-military integration Industrial park Platform strategy

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Planning, Design and Practice of the Pastoral Complex Under the Rural Revitalization Strategy: A Case Study of Guixi Town in Beichuan Qiang Autonomous County

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Journal of Landscape Research 2019年第2期11卷 8-11,15页

作者： CHE Lu li jiahua Southwest University of Science and Technology

The pastoral complex is a product of urban-rural integrated development, an important way to build beautiful villages, and an important channel for the implementation of the rural revitalization strategy. This paper analyzed the planning and design of the pastoral complex, ranging from the planning and design ideas to the functional layout, and put forward the practical strategy of the pastoral complex planning under the rural revitalization strategy: to innovate the pastoral complex model with the construction of characteristic towns as the carrier; to achieve the goal of rural revitalization with poverty alleviation as the guide; and to enrich the pastoral complex with local culture as the reliance. In this paper, Guixi Town of Beichuan Qiang Autonomous County was selected for research to explore its unique national cultural value and ecological advantages, so as to provide perfect theories for the planning of rural towns and explore a new direction of the construction of beautiful villages.

关键词： Rural revitalization strategy Pastoral complex Beautiful village construction Rural revitalization

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The Development of a Venus Flytrap Inspired Soft Robot Driven by IPMC

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Journal of Bionic Engineering 2023年第1期20卷 406-415页

作者： jiahua li Aifen Tian Yue Sun Bin Feng Hongyan Wang Xinrong Zhang School of Materials Science and Engineering Xi’an University of Science and TechnologyXi’an710054China School of Mechanical Engineering Xi’an University of Science and TechnologyXi’an710054China Shaanxi Science and Technology Holding Group Shaanxi Kekong Technology Industry Research Institute Co.LtdXi’an710000China The Key Laboratory of Road Construction Technology and Equipment MOE Chang’an UniversityXi’an710064China

In recent years,more and more creatures in nature have become the source of inspiration for people to study bionic soft robots.Many such robots appear in the public’s vision.In this paper,a Venus flytrap robot similar to the biological Venus flytrap in appearance was designed and prepared.It was mainly cast by Polydimethylsiloxane(PDMs)and driven by the flexible material of Ionic Polymer Metal Composites(IPMCs).Combining with ANSYS and related experiments,the appropriate voltage and the size of IPMC were determined.The results showed that the performance of the Venus flytrap robot was the closest to the biological Venus flytrap when the size of IPMC length,width and driving voltage reach to 3 cm,1 cm and 5.5 V,respectively.Moreover,the closing speed and angle reached 8.22°/s and 37°,respectively.Finally,the fly traps also could be opened and closed repeatedly and captured a small ball with a mass of 0.3 g firmly in its middle and tip.

关键词： Bioinspired soft robot.Venus flytrap ANSYS Ionic polymer metal composite

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雷诺数对不同展弦比下长平板绕流湍流特性影响的实验研究

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应用技术学报 2024年第1期24卷 1-8页

作者：刘宇陆刘欣丁旭李家骅上海应用技术大学理学院上海应用技术大学机械工程学院上海应用技术大学城市建设与安全工程学院

利用粒子图像测速(PIV)实验研究了不同展弦比下，雷诺数对长平板绕流的影响。雷诺数为：Re=500、800、1 000，平板板长L与厚度D的比值为L/D,L/D=3、6。实验结果表明，展弦比L/D=3时，流体从平板前缘分离后重新附着在平板尾缘处。展弦比L... 详细信息

利用粒子图像测速(PIV)实验研究了不同展弦比下，雷诺数对长平板绕流的影响。雷诺数为：Re=500、800、1 000，平板板长L与厚度D的比值为L/D,L/D=3、6。实验结果表明，展弦比L/D=3时，流体从平板前缘分离后重新附着在平板尾缘处。展弦比L/D=3和6时，平板上方再附着长度及平板后的回流区长度会随着雷诺数的增大而增大，展弦比为6时，雷诺数对板上分离泡的影响较小。雷诺数和展弦比会影响流场的湍流特性。展弦比L/D=3时，雷诺数的增加会导致平板两侧的脉动强度增加，而板后的脉动强度减弱；随着展弦比L/D增加，流场的湍流脉动强度减小。同时随着雷诺数的增加，流场中的小尺度涡结构增加。

关键词：长平板绕流涡脱落粒子图像测速

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基于BIM和物联网技术的智慧工地平台在LNG码头施工中的应用

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水运工程 2024年第2期 169-174页

作者：李家华黄黎明陈良志中交第四航务工程勘察设计院有限公司广东广州510290

针对LNG(液化天然气)码头工程施工中存在的安全风险系数大、人员管控要求高、安装难度高、工期进度紧等问题,开展基于BIM和物联网技术在智慧工地平台的研究与应用。通过采用建立BIM技术与物联网技术融合的智慧工地管理方法,深化创建施工... 详细信息

针对LNG(液化天然气)码头工程施工中存在的安全风险系数大、人员管控要求高、安装难度高、工期进度紧等问题,开展基于BIM和物联网技术在智慧工地平台的研究与应用。通过采用建立BIM技术与物联网技术融合的智慧工地管理方法,深化创建施工BIM模型,结合相应的智能化设备,实现模型与现场数据接入和集成的应用,解决了施工过程管控难、数据信息源集成多、劳务人员现场管理难等典型LNG码头工程施工问题。通过将BIM技术与智慧工地平台在施工阶段融合应用,有效提升了LNG码头工程建设项目的施工质量和技术管理水平。研究旨在为LNG码头领域的工程建设提供有益的经验和借鉴,推动智慧工地平台在该领域的应用和发展。

关键词： BIM技术物联网技术智慧工地 LNG码头

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Controlling the Balance of Photoluminescence and Photothermal Effect in Cyanostilbene-Based Luminescent liquid Crystals

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Chinese Journal of Chemistry 2022年第8期40卷 902-910页

作者： Xiang-Jian Cao Wei li jiahua li lin Zou Xing-Wang liu Xiang-Kui Ren Zhen-Qiang Yu School of Chemical Engineering and Technology State Key Laboratory of Chemical EngineeringTianjin UniversityTianjin 300350China College of Chemistry and Environmental Engineering Institute of Low-dimensional Materials Genome InitiativeShenzhen UniversityShenzhenGuangdong 518071China

Molecular motions of the luminescent liquid crystals(LLCs)show a significant effect on fluorescent emission and heat generation.In this article,a series of cyanostilbene-based LLCs(CSs:CS1-6,CS1-12,CS2-6 and CS2-12)are synthesized to investigate how the pho-toluminescence and photothermal effect balanced.Among these materials,the mesogens peripheried by single alkyl chains formed enantiotropic nematic(CS1-6)or smectic C(CS1-12)phase with different alkyl tail lengths.When the single aliphatic chain is re-placed by mini-dendrons,room temperature(RT)monotropic hexagonal columnar phase(CS2-12)or molecular liquid(CS2-6)is formed.The results revealed that all these materials exhibited high efficiency emission with the highest quantum yield reaching 59.0%.The photoluminescence and photothermal effect can be effectively tuned by dispersing CSs into a commercially available RT liquid crystal matrix 8CB,which output significantly improved photothermal conversion efficiency of 63.2%.Furthermore,the pho-tothermal can rapidly trigger the Smectic A-Nematic-Isotropic sequence transitions of 8CB doped with CSs.This work paves a way of adjusting the balance of photoluminescence and photothermal properties of the LLC materials.

关键词： Aggregation-induced emission liquid crystals Molecular motions Photothermal effect Phase transitions

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