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Accuracy comparison and improvement for state of health estimation of lithium-ion battery based on random partial recharges and feature engineering

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Journal of Energy Chemistry 2024年第5期92卷 591-604页

作者： xingjun li Dan Yu Søren Byg Vilsen Daniel Ioan Stroe Department of Energy Aalborg UniversityAalborg 9220Denmark Department of Mathematical Sciences Aalborg UniversityAalborg 9220Denmark Walker Department of Mechanical Engineering The University of Texas at AustinAustinTX 78712USA

State of health(SOH)estimation of e-mobilities operated in real and dynamic conditions is essential and *** of existing estimations are based on a fixed constant current charging and discharging aging profiles,which overlooked the fact that the charging and discharging profiles are random and not complete in real *** work investigates the influence of feature engineering on the accuracy of different machine learning(ML)-based SOH estimations acting on different recharging sub-profiles where a realistic battery mission profile is *** features were extracted from the battery partial recharging profiles,considering different factors such as starting voltage values,charge amount,and charging sliding ***,features were selected based on a feature selection pipeline consisting of filtering and supervised ML-based subset *** linear regression(MLR),Gaussian process regression(GPR),and support vector regression(SVR)were applied to estimate SOH,and root mean square error(RMSE)was used to evaluate and compare the estimation *** results showed that the feature selection pipeline can improve SOH estimation accuracy by 55.05%,2.57%,and 2.82%for MLR,GPR and SVR *** was demonstrated that the estimation based on partial charging profiles with lower starting voltage,large charge,and large sliding window size is more likely to achieve higher *** work hopes to give some insights into the supervised ML-based feature engineering acting on random partial recharges on SOH estimation performance and tries to fill the gap of effective SOH estimation between theoretical study and real dynamic application.

关键词： Feature engineering Dynamic forklift aging profile State of health comparison Machine learning lithium-ion batteries

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Data-driven diagnosis of high temperature PEM fuel cells based on the electrochemical impedance spectroscopy: Robustness improvement and evaluation

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Journal of Energy Chemistry 2024年第9期96卷 544-558页

作者： Dan Yu xingjun li Samuel Simon Araya Simon Lennart Sahlin Vincenzo liso Department of Energy Aalborg UniversityAalborg 9220Denmark Walker Department of Mechanical Engineering The University of Texas at AustinAustinTX 78712USA Materials Research and Technology Development Luxembourg Institute of Science and Technology(LIST)4422 BelvauxLuxembourg

Utilizing machine learning techniques for data-driven diagnosis of high temperature PEM fuel cells is beneficial and meaningful to the system durability. Nevertheless, ensuring the robustness of diagnosis remains a critical and challenging task in real application. To enhance the robustness of diagnosis and achieve a more thorough evaluation of diagnostic performance, a robust diagnostic procedure based on electrochemical impedance spectroscopy (EIS) and a new method for evaluation of the diagnosis robustness was proposed and investigated in this work. To improve the diagnosis robustness: (1) the degradation mechanism of different faults in the high temperature PEM fuel cell was first analyzed via the distribution of relaxation time of EIS to determine the equivalent circuit model (ECM) with better interpretability, simplicity and accuracy;(2) the feature extraction was implemented on the identified parameters of the ECM and extra attention was paid to distinguishing between the long-term normal degradation and other faults;(3) a Siamese Network was adopted to get features with higher robustness in a new embedding. The diagnosis was conducted using 6 classic classification algorithms—support vector machine (SVM), K-nearest neighbor (KNN), logistic regression (LR), decision tree (DT), random forest (RF), and Naive Bayes employing a dataset comprising a total of 1935 collected EIS. To evaluate the robustness of trained models: (1) different levels of errors were added to the features for performance evaluation;(2) a robustness coefficient (Roubust_C) was defined for a quantified and explicit evaluation of the diagnosis robustness. The diagnostic models employing the proposed feature extraction method can not only achieve the higher performance of around 100% but also higher robustness for diagnosis models. Despite the initial performance being similar, the KNN demonstrated a superior robustness after feature selection and re-embedding by triplet-loss method, which sug

关键词： PEM fuel cell Data-driven diagnosis Robustness improvement and evaluation Electrochemical impedance spectroscopy

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《齐民要术》农学思想内涵、价值与应用

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古今农业 2024年第2期 124-136页

作者：李兴军潍坊科技学院农圣文化研究中心山东潍坊262700

以农业哲学思想和农学思想为主要内容的传统农业思想,形成于中国传统哲学与生产生活的融合发展。学界对《齐民要术》的研究重于传统农业科技,而疏于农学思想的系统研究。本文通过文本研究,综合学界相关成果,结合当代农业发展,系统探析... 详细信息

以农业哲学思想和农学思想为主要内容的传统农业思想,形成于中国传统哲学与生产生活的融合发展。学界对《齐民要术》的研究重于传统农业科技,而疏于农学思想的系统研究。本文通过文本研究,综合学界相关成果,结合当代农业发展,系统探析其农学思想内涵、价值,及指导和转化为实用技术的应用,认为《齐民要术》农学思想是继承中国传统哲学和农业哲学思想,创新发展为以农本和民本为本体,技术创新和综合经营致富为根本,系统相关为核心,用养结合、良种选育、防护与生态思想为支撑,勤俭节约为原则的完整体系,可为传统文化“两创”,服务农业产业可持续发展,提供思路借鉴。

关键词：《齐民要术》农学思想传统农业哲学乡村振兴

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声声可作后人师:江恒源躬行职业指导事业的历史轨迹

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江苏高职教育 2024年第2期24卷 76-84页

作者：李兴军广州市职业技术教育研究院科研管理部广东广州510170

江恒源在中华职业教育社事业长期实践中,将职业指导与职业学校教育、职业补习教育一起视为职业教育“三大主干”,躬身入局、挺膺负责,成为同时代职业指导事业“概念化”集成者、职业指导机构“正规化”设计者、职业指导业务“规范化”... 详细信息

江恒源在中华职业教育社事业长期实践中,将职业指导与职业学校教育、职业补习教育一起视为职业教育“三大主干”,躬身入局、挺膺负责,成为同时代职业指导事业“概念化”集成者、职业指导机构“正规化”设计者、职业指导业务“规范化”实践者、职业指导思想“本土化”探索者。在他丰富的职业指导言论与实践中,得以窥见民国职业指导曲折发展脉络,置身其时代思考职业指导功能,见证职业指导由“思辨”向“量化”转变,方能体会职业指导本土应用的艰辛历程,进而启迪当今职业指导事业可持续发展。

关键词：江恒源职业指导中华职业教育社

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基于Roberts算子的激光夜视图像自动分割方法

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激光杂志 2024年第5期45卷 110-114页

作者：李星军邵志伟梁嘉怡西安欧亚学院西安710065

激光夜视图像分辨率较低,边缘信息难以检测,导致图像分割过程存在效率低、精度较差等问题,为此设计基于Roberts算子的激光夜视图像自动分割方法。使用相机采集夜间场景色彩信息,采用加权平均法重构图像数据,输出完整的激光夜视图像。拟... 详细信息

激光夜视图像分辨率较低,边缘信息难以检测,导致图像分割过程存在效率低、精度较差等问题,为此设计基于Roberts算子的激光夜视图像自动分割方法。使用相机采集夜间场景色彩信息,采用加权平均法重构图像数据,输出完整的激光夜视图像。拟合图像周边相邻像素,利用三次样条插值函数平滑处理图像,运用Roberts算子计算图像梯度,实现激光夜视图像边缘检测,得到图像插值后的平滑信息,提升夜视图像分辨率。通过模糊C均值聚类明确聚类范围,引入混沌粒子群算法实现图像分割。实验结果表明,所提方法分割差异率在3%以下,图像分割Dice相似性系数在0.97以上,图像分割平均耗时为9 s。

关键词： Roberts算子三次样条插值函数激光夜视图像图像分割模糊C均值聚类

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以脊髓炎表现为主要症状的疱疹病毒性脑脊髓炎1例报告

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中风与神经疾病杂志 2024年第10期41卷 941-944页

作者：李星君郎悦白晶吉林大学白求恩第一医院神经内科吉林长春130021

疱疹病毒性脑脊髓炎是一种中枢神经系统感染性疾病,疱疹病毒性脑炎合并脊髓炎病例少见。本文报道1例以脊髓炎表现为主要症状的疱疹病毒性脑脊髓炎患者,主要症状为头痛、双下肢活动不灵、排尿困难,分析其病例资料及诊治经过,并结合文献... 详细信息

疱疹病毒性脑脊髓炎是一种中枢神经系统感染性疾病,疱疹病毒性脑炎合并脊髓炎病例少见。本文报道1例以脊髓炎表现为主要症状的疱疹病毒性脑脊髓炎患者,主要症状为头痛、双下肢活动不灵、排尿困难,分析其病例资料及诊治经过,并结合文献进行复习,以提高临床医生对该病的认识。

关键词：中枢神经系统感染疱疹病毒脑脊髓炎二代测序治疗

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A facile ＂ship-in-a-bottle＂ approach to construct nanorattles based on upconverting lanthanide-doped fluorides

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Nano Research 2016年第1期9卷 187-197页

作者： Shan Lu Datao Tu xingjun li Renfu li Xueyuan Chen Key Laboratory of Optoelectronic Materials Chemistry and Physics and State Key Laboratory of Structural Chemistry Fujian Instituteof Research on the Structure of Matter Chinese Academy of Sciences Fuzhou 350002 China

Rattle structure is a topic of great interest in design and application of nano- materials due to the unique core@void@shell architecture and the integration of functions. Herein, we developed a novel ＂ship-in-a-bottle＂ method to fabricate upconverting （UC） luminescent nanorattles by incorporating lanthanide-doped fluorides into hollow mesoporous silica. The size of nanorattles and the filling amount of fluorides can be well controlled. In addition, the modification of silica shell （with phenylene and amine groups） and the variation of efficient UC fluorides （NaYF4：Yb, Er, NaLuF4：Yb, Er, NaGdF4：Yb, Er and liYF4：Yb, Er） were readily achieved. The resulting nanorattles exhibited a high capacity and pH-dependent release of the anti-cancer drug doxorubicin （DOX）. Furthermore, we employed these nanorattles in proof-of-concept UC-monitoring drug release by utilizing the energy transfer process from UC fluorides to DOX, thus revealing the great potential of the nanorattles as efficient cancer theranostic agent.

关键词： nanorattle upconverting luminescence lanthanide-doped fluoride hollow mesoporous silica organosilica drug release

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The development of machine learning-based remaining useful life prediction for lithium-ion batteries

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Journal of Energy Chemistry 2023年第7期82卷 103-121,I0003页

作者： xingjun li Dan Yu Vilsen Søren Byg Store Daniel Ioan Department of Energy Aalborg UniversityAalborg 9220Denmark Department of Mathematical Sciences Aalborg UniversityAalborg 9220Denmark

lithium-ion batteries are the most widely used energy storage devices,for which the accurate prediction of the remaining useful life(RUL)is crucial to their reliable operation and accident *** work thoroughly investigates the developmental trend of RUL prediction with machine learning(ML)algorithms based on the objective screening and statistics of related papers over the past decade to analyze the research core and find future improvement *** possibility of extending lithium-ion battery lifetime using RUL prediction results is also explored in this *** ten most used ML algorithms for RUL prediction are first identified in 380 relevant *** the general flow of RUL prediction and an in-depth introduction to the four most used signal pre-processing techniques in RUL prediction are *** research core of common ML algorithms is given first time in a uniform format in chronological *** algorithms are also compared from aspects of accuracy and characteristics comprehensively,and the novel and general improvement directions or opportunities including improvement in early prediction,local regeneration modeling,physical information fusion,generalized transfer learning,and hardware implementation are further ***,the methods of battery lifetime extension are summarized,and the feasibility of using RUL as an indicator for extending battery lifetime is *** lifetime can be extended by optimizing the charging profile serval times according to the accurate RUL prediction results online in the *** paper aims to give inspiration to the future improvement of ML algorithms in battery RUL prediction and lifetime extension strategy.

关键词： lithium-ion batteries Remaining useful lifetime prediction Machine learning lifetime extension

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Characterization of Kiwifruit Xyloglucan

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Journal of Integrative Plant Biology 2009年第10期51卷 933-941页

作者： xingjun li Naoki Sakurai Donald J. Nevins Academy of the State Administration of Grains Beijing 100037 China Graduate School of Biosphere Science Hiroshima University Kagamiyama 1-7-1 Higashi-hiroshima 739-8521 Japan Department of Plant Sciences University of California Davis CA 95616 USA

Structural characteristics of xyloglucan are constant in the pericarp cell walls of kiwifruit （Actinidia deliciosa） throughout fruit enlargement and maturation. Most of the xyioglucan （XG） persists in the cell walls of ripe kiwifruit. XG from the pericarp tissues of 36-h ethylene-treated kiwifruit was extracted as hemicellulose Ⅱ （HC-Ⅱ） with 4.28 M KOH containing 0.02% NaBH4, and purified using iodine precipitation and subsequent anion-exchange chromatography. This purifying protocol increased XG purity from 50 mol% in HC-Ⅱ fraction to 62 mol% in the purified XG powder. The molar ratio of glucose： xylose： galactose： fucose in the purified XG was 10： 6.9： 2.1： 0.3. Gel permeation chromatography indicated that purified XG had an average molecular-mass of 161 KDa, a value that exceeds the 95 KDa Mr determined for total polymeric sugars. Sugar linkage analysis confirmed the lack of fucose in the kiwifruit XG, but a small amount of arabinoxylan and low Mr glucomannan remained associated with this fraction.

关键词： Actinidia deliciosa cell walls glucomannan hemicellulose sugar linkage analysis xyloglucan

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《人生》之路:路遥的现实主义电影美学观探寻

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大庆师范学院学报 2024年第3期44卷 36-43页

作者：李兴军胡国利柴子倩黑龙江八一农垦大学人文社会科学学院黑龙江大庆163319

路遥擅长文学也精研电影艺术,推崇现实主义电影美学。尚真实,崇思想,求审美,是他一以贯之的美学原则。真实是电影的美学根基,思想和审美则是电影深层的美学追求。文学与电影具有亲缘性,路遥以现实主义文学之泉浇灌电影美学园地,催生了... 详细信息

路遥擅长文学也精研电影艺术,推崇现实主义电影美学。尚真实,崇思想,求审美,是他一以贯之的美学原则。真实是电影的美学根基,思想和审美则是电影深层的美学追求。文学与电影具有亲缘性,路遥以现实主义文学之泉浇灌电影美学园地,催生了中国西部电影发轫之作《人生》。他亲自改编电影《人生》剧本,力图将小说所涉及的生活真实地经由银幕呈现,以期重构城乡交叉地带青春叙事的记忆空间。电影《人生》的叙事表意、人物塑造及情节设计,融真实性、思想性和审美性于一炉,尽显现实主义美学神韵。从小说到电影,《人生》所蕴藉的文化记忆营造了一个跨越时空的沟通场域,从而为同时代人之间的记忆交流,以及不同世代之间的记忆传承提供了文化标识。

关键词：路遥《人生》现实主义文化记忆

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