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Adaptive Neural Tracking Control of MIMO Nonlinear Time-Varying Delay Systems With Actuator Faults

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Adaptive Neural Tracking Control of MIMO Nonlinear Time-Vary...

The effect of volume change and stack pressure on solid-state battery cathodes

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作者： Yuefei Wu xiangwen gao College of Automation and College of Artificial Intelligence Nanjing University of Posts and Telecommunications College of Mechanical Engineering Suzhou University of Science and Technology

This paper studies an adaptive neural control for nonlinear multiple-input multiple-output systems with unknown actuator failures and nonlinear dynamic *** novel decentralized adaptive neural control algorithms are developed by introducing a well defined smooth *** unknown time-varying delays and the unmodeled dynamics are dealt with by constructing appropriate Lyapunov-Krasovskii functions and introducing available dynamic *** main advantage of the proposed controllers is that they contain less parameter estimates that need to be updated online,which simplifies the computation of the control effort,and therefore extends its ***,simulation example is provided to illustrate the effectiveness and merits of the proposed control schemes.

关键词： Neural network multi-input-multi-output(MIMO) systems unknown actuator faults time delay

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SusMat 2023年第5期3卷 721-728页

作者： Boyang Liu Shengda DPu Christopher Doerrer Dominic Spencer Jolly Robert A.House Dominic L.R.Melvin Paul Adamson Patrick S.Grant xiangwen gao Peter G.Bruce Department of Materials University of OxfordOxfordUK The Faraday Institution DidcotUK The Henry Royce Institute University of OxfordOxfordUK Future Battery Research Center Global Institute of Future TechnologyShanghai Jiao Tong UniversityShanghaiChina Department of Chemistry University of OxfordOxfordUK

Solid-state lithium batteries may provide increased energy density and improved safety compared with Li-ion ***,in a solid-state composite cathode,mechanical degradation due to repeated cathode volume changes during cycling may occur,whichmay be partially mitigated by applying a significant,but often impractical,uniaxial stack ***,we compare the behavior of composite electrodes based on Li4Ti5O12(LTO)(negligible volume change)and Nb2O5(+4%expansion)cycled at different stack *** initial LTO capacity and retention are not affected by pressure but for Nb2O5,they are significantly lower when a stack pressure of<2MPa is applied,due to inter-particle cracking and solid-solid contact loss because of cyclic volume *** confirms the importance of cathode mechanical stability and the stack pressures for long-term cyclability for solid-state *** suggests that low volumechange cathode materials or a proper buffer layer are required for solid-state batteries,especially at low stack pressures.

关键词： cathode interface mechanical degradation stack pressure solid-state battery

Carbon-emcoating architecture boosts lithium storage of Nb_(2)O_(5)

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Science China Materials 2021年第5期64卷 1071-1086页

作者： Qing Ji Zhuijun Xu xiangwen gao Ya-Jun Cheng Xiaoyan Wang Xiuxia Zuo George Z.Chen Binjie Hu Jin Zhu Peter G.Bruce Yonggao Xia Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo 315201China The University of Nottingham Ningbo China Ningbo 315100China University of Chinese Academy of Sciences Beijing 100049China Department of Materials University of OxfordParks RdOX13PHOxfordUnited Kingdom Materials Science and Engineering Program and Texas Materials Institute University of Texas at AustinAustinTX 78712USA University of Nottingham University ParkNottingham NG72RDUnited Kingdom The Henry Royce Institute Parks RoadOxford OX13PHUnited Kingdom The Faraday Institution Quad OneBecquerel AvenueHarwell CampusDidcot OX11 OR1United Kingdom Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Intercalation transition metal oxides (ITMO)have attracted great attention as lithium-ion battery negative electrodes due to high operation safety,high capacity and rapid ion ***,the intrinsic low electron conductivity plagues the lifetime and cell performance of the ITMO negative *** we design a new carbon-emcoating architecture through single CO_(2)activation treatment as demonstrated by the Nb_(2)O_(5)/C *** structure engineering of the carbon-emcoating Nb_(2)O_(5)/C nanohybrid is achieved in terms of porosity,composition,and crystallographic *** carbon-embedding Nb_(2)O_(5)/C nanohybrids show superior cycling and rate performance compared with the conventional carbon coating,with reversible capacity of 387 m A h g(-1)at 0.2 C and 92%of capacity retained after 500cycles at 1 *** electrochemical mass spectrometry(DEMS) indicates that the carbon emcoated Nb_(2)O_(5)nanohybrids present less gas evolution than commercial lithium titanate oxide during *** unique carbon-emcoating technique can be universally applied to other ITMO negative electrodes to achieve high electrochemical performance.

关键词： niobium pentoxide/carbon nanohybrids mesoporous CO_(2)activation emcoating lithium-ion battery negative electrode

昊华国泰60000Nm^3/h空分试车运行总结

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低温与特气 2016年第5期34卷 22-25页

作者：曾祥文高兴东鄂尔多斯市国泰化工有限公司内蒙古杭锦旗017418

简述了昊华国泰化工有限公司60 000 Nm^3/h空分装置的工艺流程和主要技术参数,详细介绍了在空分装置试车运行过程中出现的问题,以及采取的相应处理措施,保证了空分装置的安全、稳定运行。

关键词：空分装置试车处理措施

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无柄人工髋关节在青壮年中的临床应用探讨

生物骨科材料与临床研究 2011年第1期8卷 47-48,51页

作者：胡彦高祥文李齐付湖北省洪湖市中医医院骨科湖北洪湖433200

目的探讨无柄人工髋关节置换术在青壮年中应用的疗效与优越性。方法对使用无柄人工全髋关节置换术治疗的12例青壮年病例进行总结。结果术后随访3-27个月,根据Harrisi髋关节功能评价标准进行评价,优良率11/12,髋关节功能良好。结论无柄... 详细信息

目的探讨无柄人工髋关节置换术在青壮年中应用的疗效与优越性。方法对使用无柄人工全髋关节置换术治疗的12例青壮年病例进行总结。结果术后随访3-27个月,根据Harrisi髋关节功能评价标准进行评价,优良率11/12,髋关节功能良好。结论无柄全髋置换术创伤小,出血少,不扩髓,保留股骨颈,为青壮年患者的翻修手术保留了基础。

关键词：髋关节置换无柄青壮年

10种杀虫剂对悬铃木方翅网蝽的毒力及混配增效作用

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山东农业科学 2023年第7期55卷 133-138页

作者：高德良吴希宝高祥文赵圣英宋化稳庄占兴于伟丽山东省农药科学研究院山东济南250100 山东仕邦农业科技有限公司山东济南250100 山东仕邦农化有限公司山东济南250100

本研究采用浸叶法测定了10种杀虫剂对悬铃木方翅网蝽成虫和若虫的毒力,并开展了高效药剂联合毒力评价及打孔注射法对悬铃木方翅网蝽的田间防治效果研究。毒力测定结果表明,甲氨基阿维菌素苯甲酸盐、噻虫嗪、联苯菊酯、呋虫胺、阿维菌素... 详细信息

本研究采用浸叶法测定了10种杀虫剂对悬铃木方翅网蝽成虫和若虫的毒力,并开展了高效药剂联合毒力评价及打孔注射法对悬铃木方翅网蝽的田间防治效果研究。毒力测定结果表明,甲氨基阿维菌素苯甲酸盐、噻虫嗪、联苯菊酯、呋虫胺、阿维菌素、螺虫乙酯对方翅网蝽毒力相对较高,对成虫的LC_(50)值分别为2.525、5.823、6.665、7.659、8.361、9.679 mg/L,对若虫的LC_(50)值分别为1.145、4.686、4.435、5.406、2.781、6.918 mg/L。甲氨基阿维菌素苯甲酸盐与噻虫嗪有效成分量以1∶2的比例混配对悬铃木方翅网蝽的增效作用最为显著,共毒系数达157.37。田间试验结果表明,5%甲氨基阿维菌素苯甲酸盐微乳剂与10%噻虫嗪微乳剂混配(有效成分配比1∶2)10 mL/棵、15 mL/棵处理对悬铃木方翅网蝽的防效相对较好,药后10 d防效达80%以上,药后20 d和30 d防效保持90%以上,5%甲氨基阿维菌素苯甲酸盐微乳剂与10%噻虫嗪微乳剂混配5 mL/棵、10%噻虫嗪微乳剂10 mL/棵、22.4%螺虫乙酯悬浮剂5 mL/棵处理药后20 d和30 d防效在80%左右。

关键词：杀虫剂悬铃木方翅网蝽毒力联合毒力防治效果

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髋关节骨折置换术后假体松动的影响因素分析

巴楚医学 2024年第3期7卷 46-49页

作者：胡彦杨斌李齐付高祥文周大标湖北中医药大学附属洪湖市中医医院骨科湖北洪湖433200 湖北中医药大学第一临床学院湖北武汉430065

目的:分析髋关节骨折置换术后假体松动的影响因素。方法:纳入2018年9月—2022年6月在湖北中医药大学附属洪湖市中医医院行全髋关节置换术的118例患者,根据术后关节是否松动分为不松动组(n=109)和松动组(n=9)。收集患者临床资料,采用单... 详细信息

目的:分析髋关节骨折置换术后假体松动的影响因素。方法:纳入2018年9月—2022年6月在湖北中医药大学附属洪湖市中医医院行全髋关节置换术的118例患者,根据术后关节是否松动分为不松动组(n=109)和松动组(n=9)。收集患者临床资料,采用单因素和多因素Logistic回归分析术后假体松动的独立影响因素。结果:髋关节置换术后假体松动的发生率为7.63%(9/118),多因素Logistic回归分析结果显示,高龄≥75岁(OR=2.623,95%CI:2.370,4.784)、骨质疏松(OR=3.280,95%CI:4.470,7.538)、BMI>28 kg/m^(2)(OR=2.936,95%CI:4.816,6.781)、假体周围骨折(OR=3.739,95%CI:5.210,6.705)均是术后假体松动的独立影响因素(均P<0.05)。结论:高龄、骨质疏松、超重、假体周围骨折是髋关节置换术后假体松动的独立影响因素。

关键词：髋关节置换术假体松动骨质疏松

Factors Limiting the Forecast Skill of the Boreal Summer Intraseasonal Oscillation in a Subseasonal-to-Seasonal Model

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Advances in Atmospheric Sciences 2019年第1期36卷 104-118页

作者： Zheng HE Pangchi HSU xiangwen LIU Tongwen WU Yingxia gao Key Laboratory of Meteorological Disaster of Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and Technology Weather Modification Office of Heilongjiang Province Heilongjiang Meteorological Bureau Climate Model Division National Climate CenterChina Meteorological Administration

In this study,we evaluate the forecast skill of the subseasonal-to-seasonal(S2S)prediction model of the Beijing Climate Center(BCC)for the boreal summer intraseasonal oscillation(BSISO).We also discuss the key factors that inhibit the BSISO forecast skill in this *** on the bivariate anomaly correlation coefficient(ACC)of the BSISO index,defined by the first two EOF modes of outgoing longwave radiation and 850-hPa zonal wind anomalies over the Asian monsoon region,we found that the hindcast skill degraded as the lead time *** ACC dropped to below 0.5for lead times of 11 days and longer when the predicted BSISO showed weakened strength and insignificant northward *** identify what causes the weakened forecast skill of BSISO at the forecast lead time of 11 days,we diagnosed the main mechanisms responsible for the BSISO northward *** same analysis was also carried out using the observations and the outputs of the four-day forecast lead that successfully predicted the observed northward-propagating *** found that the lack of northward propagation at the 11-day forecast lead was due to insufficient increases in low-level cyclonic vorticity,moistening and warm temperature anomalies to the north of the convection,which were induced by the interaction between background mean flows and BSISO-related anomalous *** BCC S2S model can predict the background monsoon circulations,such as the low-level southerly and the northerly and easterly vertical shears,but has limited capability in forecasting the distributions of circulation and moisture anomalies.

关键词： BCC S2S model boreal summer intraseasonal oscillation forecast skill northward propagation

The occurrence phases and enrichment mechanism of rare earth elements in cobalt-rich crusts from Marcus-Wake Seamounts

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Acta Oceanologica Sinica 2024年第8期43卷 58-68页

作者： Jingjing gao Jihua Liu Hui Zhang Shijuan Yan xiangwen Ren Quanshu Yan Key Laboratory of Marine Geology and Metallogeny First Institute of OceanographyMinistry of Natural ResourcesQingdao 266061China Laboratory for Marine Geology Laoshan LaboratoryQingdao 266237China

To explore the occurrence phases and enrichment mechanism of rare earth elements(REEs)in cobalt-rich crusts,this study analyzes the mineral composition and REE contents of the samples from Marcus-Wake Seamounts by XRD,ICP-OES and *** results show that,(1)the cobalt-rich crusts contain the major crystalline mineral(vernadite),the secondary minerals(quartz,plagioclase and carbonate fluorapatite),and a large amount of amorphous ferric oxyhydroxides(FeOOH).(2)The cobalt-rich crusts contains higher Mn(10.83%to 28.76%)and Fe(6.14%to 18.86%)relative to other elements,and are enriched in REEs,with total REE contents of 1563−3238μg/g and Ce contents of 790−1722μg/*** earth element contents of the old crusts are higher than those of the new ***,the non-phosphatized crusts have positive Ce and negative Y anomalies,and yet the phosphatized crusts have positive Ce and positive Y anomalies,indicating that cobalt-rich crusts is hydrogenetic and REEs mainly come from seawater.(3)Analytical data also show that the occurrence phases of elements in cobalt-rich crusts are closely related to their mineral *** the non-phosphatized crusts,REEs are adsorbed by colloidal particles into the crusts(about 67%of REEs in the Fe oxide phase,and about 17%of REEs in the Mn oxide phase).In contrast,in the phosphatized crusts(affected by the phosphatization),REEs may combine with phosphate to form rare earth phosphate minerals,and about 64%of REEs are enriched in the residual phase containing carbonate fluorapatite,but correspondingly the influence of Fe and Mn oxide phases on REEs enrichment is greatly *** addition,the oxidizing environment of seawater,high marine productivity,phosphatization,and slow growth rate can promote the REE *** study provides a reference for the metallogenesis of cobalt-rich crusts in the Pacific.

关键词： cobalt-rich crusts REEs occurrence phase enrichment mechanism Marcus-Wake Seamounts