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Adaptive control method for nonlinear time-delay processes

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Journal of Systems Engineering and Electronics 2007年第3期18卷 566-576页

作者： chen Zonghai Zhang haitao Li Ming Xiang Wei Dept of Automation Univ of Science and Technology of China Hefei 230027 P R China

Two complex properties, varying time-delay and block-oriented nonlinearity, are very common in chemical engineering processes and not easy to be controlled by routine control methods. Aimed at these two complex properties, a novel adaptive control algorithm the basis of nonlinear OFS （orthonormal functional series） model is proposed. First, the hybrid model which combines OFS and Volterra series is introduced. Then, a stable state feedback strategy is used to construct a nonlinear adaptive control algorithm that can guarantee the closed-loop stability and can track the set point curve without steady-state errors. Finally, control simulations and experiments on a nonlinear process with varying time-delay are presented. A number of experimental results validate the efficiency and superiority of this algorithm.

关键词： adaptive control block-oriented nonlinearity varying time-delay OFS Volterra Series,

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既有铁路桥梁桩基检测与病害加固处治

世界桥梁 2024年第2期52卷 120-126页

作者：陈海涛马远刚吕曹炯毛建锋桥梁智能与绿色建造全国重点实验室湖北武汉430034 中铁大桥科学研究院有限公司湖北武汉430034 高速铁路建造技术国家工程研究中心湖南长沙410075

某既有铁路桥梁因水害导致墩身位移,为快速无损进行桩基完整性检测,采用基于桩侧切割小平台作为激发点的瞬态激振的双速度法,共检测5根角桩,判定3根桩无缺陷反射,2根桩局部有缺陷异常反射。对其中2根无缺陷桩和1根有缺陷桩进行钻孔验证,... 详细信息

某既有铁路桥梁因水害导致墩身位移,为快速无损进行桩基完整性检测,采用基于桩侧切割小平台作为激发点的瞬态激振的双速度法,共检测5根角桩,判定3根桩无缺陷反射,2根桩局部有缺陷异常反射。对其中2根无缺陷桩和1根有缺陷桩进行钻孔验证,3根桩芯样结果与检测结果一致。针对墩身位移病害,分两阶段进行加固处治,第一阶段主要采取山体侧清方卸载、设置环形截水沟、临空侧设置钢板桩及填土反压等应急抢险措施,阻止病害程度进一步加剧;第二阶段综合采取增设仰斜孔排水、锚杆框架梁、锚固桩、扩大承台及加桩等永久整治措施。经两阶段加固处治后线路恢复运营,桩身应变、墩身及轨道位移监测数据均正常。

关键词：铁路桥梁水害墩身位移桩基检测双速度法加固处治扩大承台加固桩

非独立组网架构下5G网络全网性能优化及仿真分析

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信息记录材料 2024年第9期25卷 6-9页

作者：陈海涛梁有程广州民航职业技术学院广东广州510403

非独立(non-standalone,NSA)组网是在4G网络的基础上进行5G网络的部署,通过将4G网络改造接入到5G核心网,实现5G网络的业务功能。为了更好地分析NSA组网架构下的网络性能,对5G网络的组网架构进行详细介绍,分析NSA组网架构下5G网络性能指... 详细信息

非独立(non-standalone,NSA)组网是在4G网络的基础上进行5G网络的部署,通过将4G网络改造接入到5G核心网,实现5G网络的业务功能。为了更好地分析NSA组网架构下的网络性能,对5G网络的组网架构进行详细介绍,分析NSA组网架构下5G网络性能指标,在此基础上结合无线网络性能参数探讨5G网络性能优化的具体策略。根据网络优化策略结合网络优化软件对NSA组网架构下的网络性能参数开展网络优化案例分析,仿真分析实例可为无线网络性能参数优化方法提供具体的实施参考。

关键词：非独立(NSA)组网 5G无线网络网络性能网络优化

同方期刊数据库博看期刊评论

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电伴热在光热发电熔盐系统中的应用浅析

电力设备管理 2024年第15期 131-133页

作者：申晓蕾陈海涛北京吉北电力工程咨询有限公司

随着光热发电行业的发展,高温管道伴热对传统伴热行业提出了新的需求和挑战。本文以槽式熔盐光热电站为参考,对熔盐系统中的管道、设备电伴热的需求、市场现有电伴热产品的特点进行了分析,同时,就集肤电伴热、电加热管用于熔盐管道伴热... 详细信息

随着光热发电行业的发展,高温管道伴热对传统伴热行业提出了新的需求和挑战。本文以槽式熔盐光热电站为参考,对熔盐系统中的管道、设备电伴热的需求、市场现有电伴热产品的特点进行了分析,同时,就集肤电伴热、电加热管用于熔盐管道伴热的优势及限制进行了简单讨论,并提出了电伴热系统在选型、设计思路、现场应用的建议。

关键词：电伴热光热发电槽式熔盐管道

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基于AIGC检测技术的版权管理模式研究

出版发行研究 2024年第7期 72-79页

作者：张立张宏伟肖宏陈海涛耿崇张馨月山东大学新闻传播学院中国音像与数字出版协会同方知网数字出版技术股份有限公司山东大学

AIGC的爆发及其广泛应用,极大地冲击了传统的版权管理体制,其不仅影响文案写作,还波及学术论文、文学作品、音乐绘画、动画、动漫等的创作。面对这一冲击,全球版权界尚无可行的应对策略,目前的解决办法仅限于:不承认AI生成内容的作品性... 详细信息

AIGC的爆发及其广泛应用,极大地冲击了传统的版权管理体制,其不仅影响文案写作,还波及学术论文、文学作品、音乐绘画、动画、动漫等的创作。面对这一冲击,全球版权界尚无可行的应对策略,目前的解决办法仅限于:不承认AI生成内容的作品性,或要求作者提供使用AI生成作品的比例与细节,或自行声明自己的作品未使用AI生成等。但这些都不是根本的解决办法。基于此,迫切需要将一种AIGC的检测工具应用于版权管理,从而使断裂的管理流程再次修复并完善。文章从AIGC检测工具的研究、设计入手,通过技术手段的引入,构建AI时代具有中国特色的版权管理体系,服务于国家管理、司法鉴定、行业规范、企业知识产权策略和作者个人维权等。

关键词：人工智能 AIGC 版权管理检测技术

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气垫船导管内蒙皮结构疲劳分析

舰船科学技术 2024年第12期46卷 13-16页

作者：陈海涛张梗林张平王云霆许博方中国船舶及海洋工程设计研究院上海200011

针对气垫船导管内蒙皮结构使用中出现撕裂的问题,应用实测载荷和材料数据,进行有限元静强度分析,基于采用名义应力法,采用MSC Fatigue进行疲劳分析,根据结果对内蒙皮结构做改进设计,表明导管内蒙皮结构须按疲劳强度要求进行设计,提出的... 详细信息

针对气垫船导管内蒙皮结构使用中出现撕裂的问题,应用实测载荷和材料数据,进行有限元静强度分析,基于采用名义应力法,采用MSC Fatigue进行疲劳分析,根据结果对内蒙皮结构做改进设计,表明导管内蒙皮结构须按疲劳强度要求进行设计,提出的名义应力法可用于导管内蒙皮结构疲劳强度评估。

关键词：气垫船导管内蒙皮名义应力法疲劳分析

Morphological and phylogenetic diversity of magnetotactic bacteria and multicellular magnetotactic prokaryotes from a mangrove ecosystem in the Sanya River,South China

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Journal of Oceanology and Limnology 2021年第6期39卷 2015-2026页

作者： haitao chen Jinhua LI Long-Fei WU Wei-Jia ZHANG Beijing Key Laboratory of Biological Electromagnetism Institute of Electrical EngineeringChinese Academy of SciencesBeijing 100190China France-China Joint Laboratory for Evolution and Development of Magnetotactic Multicellular Organisms Chinese Academy of SciencesBeijing 100029China Deep-Sea Microbial Cell Biology Department of Deep Sea SciencesInstitute of Deep-Sea Science and EngineeringChinese Academy of SciencesSanya 572000China Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China LCB Aix Marseille UniversityCNRSMarseille 13402France

Magnetotactic bacteria(MTB)are morphologically and phylogenetically diverse prokaryotes commonly able to produce magnetic nanocrystals within intracellular membrane-bound organelles(i.e.,magnetosomes)and to swim along geomagnetic field *** studied the diversity of MTB in the samples collected from a mangrove area in the Sanya River,Hainan,South China,using microscopic and microbial phylogenetic *** of microanalysis and observation in microscopy and energy dispersive X-ray spectroscopy(EDXS)reveal a highly morphological diversity of MTB including unicellular cocci,vibrios,rod-shaped bacteria,and three morphotypes of multicellular magnetotactic prokaryotes(MMPs).In addition,analysis of the 16S rRNA gene showed that these MTB were clustered into 16 operational taxonomic units affi liated to the Alpha-,Delta-,and Gamma-proteobacteria classes within the Proteobacteria ***,by using the coupled fluorescence and transmission electron microscopy analysis,rodshaped bacteria,vibrio,and cocci were phylogenetically and structurally identified at the single-cell *** study demonstrated highly diverse MTB communities in the mangrove ecosystem and provide a new insight into the overall diversity of MTB.

关键词： magnetotactic bacteria diversity magnetosome phylogenetic analysis coordinated fl uorescence in-situ hybridization transmission electron microscopy(FISH-TEM) mangrove

Microstructure and Mechanical Properties of Nickel‑Aluminum Bronze Coating on 17‑4PH Stainless Steel by Laser Cladding

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Chinese Journal of Mechanical Engineering 2022年第6期35卷 403-414页

作者： Lu Zhao Baorui Du Jun Yao haitao chen Ruochen Ding Kailun Li Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Shenyang Dalu Laser Advanced Manufacturing Technology Innovation Co.Ltd Shenyang 110000China Institute of Science and Technology China Three Gorges CorporationBeijing 100038China

Bimetallic copper-steel composite could be an effective structural material to improve the performance of traditional nickel-aluminum bronze(NAB)ship propeller due to its high structural strength and corrosion *** this work,the defect-free NAB coatings has been successfully fabricated by laser direct depositing technique on the 17-4PH stainless steel *** phase constitution,microstructure characteristics and hardness properties were investigated in *** XRD results showed that the coatings mainly consisted ofα-Cu,Fe and intermetallicκphases despite the diffraction peaks shifted more than 0.5°,which may due to the influence of the Ni,Fe and Al atoms dissolved into *** microstructures of the coatings were affected significantly by laser energy density according to SEM and EDS *** top region of the coating was more undercooled during solidification,therefore the grains at this region was much finer than that at the bottom *** higher energy input would lead to coarser ***-rich dendrites and spherical particles were found in the Cu matrix,which could be a result of liquid *** hardness of the coating is in the range of 204 HV0.2–266 HV0.2 which is higher than traditional as-cast *** uneven distribution of Fe-rich phases as well as the hardκphases could be the main reasons for the fluctuations of the hardness *** fracture occurred at bronze side,not at transition zone,which shows there is a good interfacial bonding between the two metals produced by laser cladding.

关键词： Laser direct depositing Nickel-aluminum bronze Microstructure Hardness Tensile Liquid separation

Preparation of Cellulose Nanofibrils by Multi-Site Regioselective Oxidation

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Journal of Renewable Materials 2020年第10期8卷 1269-1282页

作者： Liying Song Xixiang Pei Rui Li haitao chen Xiaozheng Sun College of Engineering Northeast Agricultural UniversityHarbin150030China Harbin Botai Biological Technology Co. Ltd.Harbin150030China

Cellulose nanofibrils(CNFs)are promising sustainable materials that can be applied to nanocomposites,as well as medical and life-sciences ***,methods for the preparation of these important materials are energy intensive because heating and mechanical disintegration are required to produce cellulose fibers below 100 nm in *** this study,CNFs were prepared through the multi-site regioselective oxidation of cellulose with 2,2,6,6-tetramethylpiperidine-1-oxyl(TEMPO)and periodate at room temperature(20–25°C),without any mechanical-disintegration *** electron microscopy(TEM)revealed that the CNFs had the average widths of 14.1,55.4,and 81.9 nm for three different ***-transform infrared spectroscopy revealed that carboxyl groups were created on the surfaces of the microfibrils,while X-ray diffraction studies showed that the cellulose I structure was maintained after oxidation,and that the cellulose nanofibril crystallinity index exceeded 70%.These results demonstrate that CNFs can be prepared by multi-site regioselective oxidation at room temperature in the absence of mechanical disin*** addition,a model was developed to calculate the total content of carboxylate and aldehyde groups of CNFs prepared by the TEMPO mediate oxidation,the periodate oxidation,and the multi-site regioselective oxidation methods based on the particle width determined by *** calculated values of the model were in good agreement with the total content(experimental value)of carboxylate and aldehyde groups of CNFs prepared by the TEMPO-mediated oxidation and the multi-site regioselective oxidation ***,the model was not valid for CNFs prepared by the periodate oxidation method.

关键词： Cellulose nanofibril multi-site regioselective oxidation total content of carboxylate and aldehyde groups particle width