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A generalizable, data-driven online approach to forecast capacity degradation trajectory of lithium batteries

Journal of Energy Chemistry 2022年第5期31卷 548-555页

作者： Xinyan Liu Xue-qiang Zhang Xiang Chen Gao-Long Zhu Chong yan Jia-Qi Huang hong-Jie Peng Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 611731SichuanChina Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Advanced Research Institute of Multidisciplinary Science Beijing Institute of TechnologyBeijing 100081China

Estimating battery degradation is vital not only to monitor battery’s state-of-health but also to accelerate research on new battery chemistries. Herein, we present a data-driven approach to forecast the capacity fading trajectory of lab-assembled lithium batteries. Features with physical meanings in addition to predictive abilities are extracted from discharge voltage curves, enabling online prediction for a single cell with only its historical data. The robustness and generalizability allow for the demonstration on a compromised quality dataset consisting of batteries varying in battery architectures and cycling conditions,with superior accuracy for end of life and degradation trajectory prediction with average errors of 8.2%and 2.8%, respectively. Apart from the impressive prediction accuracy, the as-extracted features also provide physical insights, the incorporation of which into material design or battery operation conditions further enlightens the development of better batteries. We highlight the effectiveness of time-seriesbased techniques in forecasting battery cycling performance, as well as the huge potential of datadriven methods in unveiling hidden correlations in complicated energy chemistries such as lithium metal batteries.

关键词： Battery prognosis Machine learning Time series forecasting Online prediction Lithium metal batteries

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nfluences of superheat and cooling intensity on macrostructure and macrosegregation of duplex stainless steel studied by thermal simulation

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Journal of Iron and Steel Research International 2021年第9期28卷 1125-1132页

作者： hong-gang Zhong Xiang-ru Chen yan-jie Liu Zhi-qiang Wei Hai-feng Yu Qi-jie Zhai Center for Advanced Solidification Technology Shanghai UniversityShanghai200444China Shanghai Institute of Materials Genome Shanghai200444China Research Institute Baoshan Iron&Steel Co.Ltd.Shanghai200431China

The influences of superheat and cooling intensity on macrostructure and macrosegregation of one new kind duplex stainless steel(DSS)were *** simulation equipment was applied to prepare samples,which could reproduce the industrial processes of DSS manufactured by a vertical continuous slab *** and macrosegregation were analyzed using the digital single lens reflex and laser-induced breakdown spectroscope(LIBSOPA-200),*** percentage of both chill zone and center equiaxed zone increases with the superheat decreasing,while that of the columnar zone *** is only equiaxed grain existing as the superheat is 10 and 20℃.The lower the superheat is,the coarser the gain size *** cooling intensity in mold could remarkably decrease the chill zone length and refine the grains in chill zone and center equiaxed *** influences of cooling intensity on macrosegregation are greater than those of *** macrosegregation of Si,Mn and Cr is slightly dependent on superheat,while that of Cu,Mo and Ni changes greatly with superheat increasing.

关键词： Continuous casting Solidification Thermal simulation Duplex stainless steel Macrosegregation

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Causal effects of circulating vitamin levels on the risk of heart failure:a Mendelian randomization study

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Journal of Geriatric Cardiology 2023年第3期20卷 195-204页

作者： Bo GUAN Xiao-qiang CHEN yan LIU Hui ZHOU Ming-yan yanG hong-Wei ZHENG Shi-Jun LI Jian CAO Medical School of Chinese PLA General Hospital BeijingChina Department of Cardiology Shanghai General HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghaiChina Xiangya School of Nursing Central South UniversityChangshaHunanChina Department of Cardiology Tangshan Gongren Hospital Affiliated to Hebei Medical UniversityTangshanChina Geriatric Cardiology Department of the Second Medical Center and National Clinical Research Center for Geriatric Diseases Chinese PLA General HospitalBeijingChina

BACKGROUND Observational studies suggest inverse associations between serum vitamin levels and the risk of heart failure(HF). However, the causal effects of vitamins on HF have not been fully elucidated. Here, we conducted a Mendelian randomization(MR) study to investigate the causal associations between genetically determined vitamin levels and *** Genetic instrumental variables for circulating vitamin levels, including vitamins A, B, C, D, and E, which were assessed as either absolute or metabolite levels were obtained from public genome-wide association studies. Summary statistics for single-nucleotide-polymorphisms and HF associations were retrieved from the HERMES Consortium(47,309 cases and 930,014controls) and FinnGen Study(30,098 cases and 229,612 controls). Two-sample MR analyses were implemented to assess the causality between vitamin levels and HF per outcome database, and the results were subsequently combined by *** Our MR study did not find significant associations between genetically determined circulating vitamin levels and HF risk. For absolute vitamin levels, the odds ratio for HF ranged from 0.97(95% confidence interval [CI]: 0.85–1.09, P = 0.41) for vitamin C to 1.05(95% CI: 0.61–1.82, P = 0.85) for vitamin A. For vitamin metabolites, the odds ratio ranged between 0.94(95% CI:0.75–1.19, P = 0.62) for α-tocopherol and 1.11(95% CI: 0.98–1.26, P = 0.09) for γ-*** Evidence from our study does not support the causal effects of circulating vitamin levels on HF. Therefore,there may be no direct beneficial effects of vitamin intake on the prevention of primary HF.

关键词： vitamin prevention absolute

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Effects of the information–knowledge–attitude–practice nursing model combined with predictability intervention on patients with cerebrovascular disease

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World Journal of Clinical Cases 2022年第20期10卷 6803-6810页

作者： hong-Liang Huo Yuan-Yuan Gui Chun-Miao Xu yan Zhang qiang Li Department of Nursing The Fourth Affiliated Hospital of Qiqihar Medical UniversityQiqihar 161000Heilongjiang ProvinceChina Nursing School Qiqihar Medical UniversityQiqihar 161006Heilongjiang ProvinceChina

BACKGROUND Cerebrovascular disease(CVD)poses a serious threat to human health and ***,developing a reasonable exercise program plays an important role in the long-term recovery and prognosis for patients with *** have shown that predictive nursing can improve the quality of care and that the information–knowledge–attitude–practice(IKAP)nursing model has a positive impact on patients who suffered a *** studies have combined these two nursing models to treat *** To explore the effect of the IKAP nursing model combined with predictive nursing on the Fugl–Meyer motor function(FMA)score,Barthel index score,and disease knowledge mastery rate in patients with *** A total of 140 patients with CVD treated at our hospital between December 2019 and September 2021 were randomly divided into two groups,with 70 patients in *** control group received routine nursing,while the observation group received the IKAP nursing model combined with predictive *** groups were observed for self-care ability,motor function,and disease knowledge mastery rate after one month of *** There was no clear difference between the Barthel index and FMA scores of the two groups before nursing(P>0.05);however,their scores increased after *** increase was more apparent in the observation group,and the difference was statistically significant(P<0.05).The rates of disease knowledge mastery,timely medication,appropriate exercise,and reasonable diet were significantly higher in the observation group than in the control group(P<0.05).The satisfaction rate in the observation group(97.14%)was significantly higher than that in the control group(81.43%;P<0.05).CONCLUSION The IKAP nursing model,combined with predictive nursing,is more effective than routine nursing in the care of patients with CVD,and it can significantly improve the Barthel index and FMA scores with better knowledge acquisition,as well as produce high satisfaction in ***

关键词： Information–knowledge–attitude–practice nursing model Predictive nursing Cerebrovascular disease Barthel index Fugl–Meyer motor function score Disease knowledge mastery rate

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Effects of nursing care in fast-track surgery on postoperative pain, psychological state, and patient satisfaction with nursing for glioma

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World Journal of Clinical Cases 2021年第20期9卷 5435-5441页

作者： yan-hong Deng Yi-Mei yang Jian Ruan Lin Mu Shi-qiang Wang Department of Neurosurgery Chongqing University Cancer HospitalChongqing 400030China Sterile Supply Center Chongqing University Cancer HospitalChongqing 400030China Department of Anesthesiology Chongqing University Cancer HospitalChongqing 400030China

BACKGROUND The brain is the most complex organ in the human *** for a glioma always involves a multi-disciplinary *** care in fast-track surgery or enhanced recovery after surgery is such kind of work implemented by an interdisciplinary team to provide services to patients to improve their *** To explore the effects of nursing care in fast-track surgery on postoperative pain,psychological state,and patient satisfaction with nursing for *** From June 2018 to June 2020,138 patients who underwent operation for glioma at Cancer Hospital Affiliated to Chongqing University were *** were categorized into groups according to different nursing care that they *** them,69 patients receiving nursing care in fast-track surgery were included in an experimental group,and 69 patients receiving conventional postoperative nursing were included in a control *** analogue scale was used to evaluate postoperative pain in the two groups immediately after the operation and at 3 d after the ***-rating anxiety scale(SAS)and self-rating depression scale(SDS)were used to evaluate the psychological status of patients immediately after operation and on the 3rd postoperative day.A self-made satisfaction scale for patient satisfaction with nursing was used to evaluate and compare patient satisfaction with nursing between the two *** Time to excretion,time to out-of-bed activities,and length of hospital stay were significantly shorter in the observation group than in the control group(P0.05).There was no significant difference in postoperative pain score between the two groups(P>0.05).The pain score was significantly lower in the observation group than in the control group at 3 d after the operation(P<0.05).There was no significant difference in postoperative SAS or SDS score between the

关键词： Nursing care in fast-track surgery Glioma Visual analogue scale Self-rating anxiety scale Self-rating depression scale

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Strong Coupling of a Meta-Diatom to a Plasmonic Nanocavity

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Chinese Physics Letters 2013年第8期30卷 148-151页

作者： CHEN San LU hong-yan LIU Jian-qiang ZHU Yong-Yuan School of Physics and Electronic Information Huaibei Normal UniversityHuaibei 235000 School of Science Jiujiang UniversityJiujiang 332005 National Laboratory of Solid State Microstructures and Department of PhysicsNanjing UniversityNanjing 210093

A strong coupling meta-diatom-plasmonic nanocavity is proposed and numerically *** the meta-diatomic sizes are gradually increased,the meta-diatomic electric dipole and quadrupole resonances could strongly couple to those of the *** characteristic anticrossing behaviors of three hybrid modes manifest the occurrence of the strong coupling from the transmission spectra,with Rabi-type splittings at about 40.8 meV and 128.4 meV for dipole interaction,and 11.8 meV and 72.7 meV for quadrupole interaction,*** also present the coupling strength dependence on meta-atomic positions,in which one meta-atomic position is fixed and the other is *** average Rabi-type splittings of three polariton modes are used to evaluate the coupling strength of the meta-atomic position *** corresponding Rabi-type oscillation in the time domain is also presented,which is obviously different from the one of a single meta-atom strongly coupling to a nanocavity.

关键词： coupling dipole splitting

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Natural nitrogen-doped multiporous carbon from biological cells as sulfur stabilizers for lithium-sulfur batteries

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Chinese Chemical Letters 2017年第4期28卷 738-742页

作者： yan-Ping Xie hong-Wei Cheng Wei Chai hong Yue Xuan Zhang Jian-Hui Fang hong-Bin Zhao Jia-qiang Xu College of Science Shanghai University Shanghai 200444 China Department of Material Science and Engineering Shanghai University Shanghai 200444 China Department of Chemical Engineering Zaozhuang Vocational College Zaozhuang 277800 China

In this context,we firstly synthesized a novel nitrogen-doped multiporous carbon material from renewable biological cells through a facile chemical activation with K;CO;.After sulfur impregnation,the carbon/sulfur composite achieved a sulfur content of about 67 wt%.The C/S composite as the cathode of lithium-sulfur batteries exhibited a discharge capacity of 1410 mAh/g and good capacity retention of912 mAh/g at *** outstanding results were attributed to the synergy effect of microporous carbon and natural doping nitrogen *** believe that the facile approach for the synthesis of nitrogen-doped multiporous carbon from the low-cost and sustainable biological resources will not only be applied in lithium-sulfur batteries,but also in other electrode materials.

关键词： Biological cell Multiporous carbon Nitrogen-doped Lithium-sulfur batteries

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血浆BNP水平在老年COPD患者呼吸机脱机中的评估

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心脑血管病防治 2011年第4期11卷 267-269,I0001,I0002页

作者：许强宏严静龚仕金蔡国龙吴亮戴海文陈进浙江医院浙江杭州310013

接受机械通气的慢性阻塞性肺病（COPD）急性加重患者常常存在脱机困难[1]。呼吸力学加重和所产生的呼吸肌疲劳、肺动脉嵌压升高、急性左心室缺血、左心室射血分数下降和右心室扩大伴随室间隔左移位[2]是脱机失败的主要原因。COPD患者常... 详细信息

接受机械通气的慢性阻塞性肺病（COPD）急性加重患者常常存在脱机困难[1]。呼吸力学加重和所产生的呼吸肌疲劳、肺动脉嵌压升高、急性左心室缺血、左心室射血分数下降和右心室扩大伴随室间隔左移位[2]是脱机失败的主要原因。COPD患者常出现呼气流速受限导致的肺动态充气过度,

关键词： COPD患者呼吸机脱机 P水平慢性阻塞性肺病左心室射血分数评估老年 BN

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Methods and mechanisms for uniformly refining deformed mixed and coarse grains inside a solution-treated Ni-based superalloy by two-stage heat treatment

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Journal of Materials Science & Technology 2021年第18期77卷 47-57页

作者： Guan-qiang Wang Ming-Song Chen hong-Bin Li Y.C.Lin Wei-Dong Zeng yan-Yong Ma School of Mechanical and Electrical Engineering Central South UniversityChangsha 410083China Light Alloy Research Institute Central South UniversityChangsha 410083China State Key Laboratory of High Performance Complex Manufacturing Changsha 410083China College of Metallurgies and Energy North China University Science and TechnologyTangshan 063009China

The uniform refinement mechanisms and methods of deformed mixed and coarse grains inside a solution-treatment Ni-based superalloy during two-stage annealing treatment have been *** two-stage heat treatment experiments include an aging annealing treatment(AT)and a subsequent recrystallization annealing treatment(RT).The object of AT is to precipitate someδphases and consume part of storage energy to inhibit the grain growth during RT,while the RT is to refine mixed and coarse grains by *** can be found that the recrystallization grains will quickly grow up to a large size when the AT time is too low or the RT temperature is too high,while the deformed coarse grains cannot be eliminated when the AT time is too long or the RT temperature is too *** addition,the mixed microstructure composed of some abnormal coarse recrystallization grains(ACRGs)and a large number of fine grains can be observed in the annealed specimen when the AT time is 3 h and RT temperature is 980℃.The phenomenon attributes to the uneven distribution ofδphase resulted from the heterogeneous deformation energy when the AT time is too *** the regions with a large number ofδphases,the recrystallization nucleation rate is promoted and the growth of grains is limited,which results in fine ***,in the regions with fewδphases,the recrystallization grains around grain boundaries can easily grow up,and the new recrystallization nucleus is difficult to form inside grain,which leads to ***,in order to obtain uniform and fine annealed microstructure,it is a prerequisite to precipitate even-distributedδphase by choosing a suitable AT time,such as 12 ***,a relative high RT temperature is also needed to promote the recrystallization nucleation aroundδ*** optimal annealing parameters range for uniformly refining mixed crystal can be summarized as:900℃×12 h+990℃×(40-60 min)and 900℃×12 h+1000℃×(10-15 min).

关键词： Ni-based superalloy Aging annealing Recrystallization annealing Grain refinement Microstructural evolution Mixed grain microstructure

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Deployment dynamics of a simplified spinning IKAROS solar sail via absolute coordinate based method

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Acta Mechanica Sinica 2013年第1期29卷 132-142页

作者： Jing Zhao Hai-yan Hu qiang Tian State Key Lab of Mechanics and Control of Mechanical Structures Nanjing University of Aeronautics and Astronautics School of Aerospace Engineering Beijing Institute of Technology

The spinning solar sail of large scale has been well developed in recent years. Such a solar sail can be considered as a rigid-flexible multibody system mainly composed of a spinning central rigid hub, a number of flexible thin tethers, sail membranes, and tip masses. A simplified interplanetary kite-craft accelerated by radiation of the Sun （IKAROS） model is established in this study by using the absolute-coordinate-based （ACB） method that combines the natural coordinate formulation （NCF） describing the central rigid hub and the absolute nodal coordinate formulation （ANCF） describing flexible parts. The initial configuration of the system in the second-stage deployment is determined through both dynamic and static analyses. The huge set of stiff equations of system dynamics is solved by using the generalized-alpha method, and thus the deployment dynamics of the system can be well understood.

关键词： Solar sail · Spinning deployment - Natural coordinate formulation Absolute nodal coordinate formulation

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