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一类复杂非线性系统的模糊控制

控制理论与应用 2008年第4期25卷 780-782页

作者：杜贞斌胡寿松烟台大学计算机学院山东烟台264005 南京航空航天大学自动化学院江苏南京210016

针对一类复杂非线性系统,把模糊T-S模型和自适应模糊逻辑系统结合起来,提出了一种跟踪控制方案.首先,应用模糊T-S模型对非线性系统建模,设计观测器用来观测系统状态:其次,应用基于权值、中心和宽度3个参数可调节的自适应时延模糊逻辑系... 详细信息

针对一类复杂非线性系统,把模糊T-S模型和自适应模糊逻辑系统结合起来,提出了一种跟踪控制方案.首先,应用模糊T-S模型对非线性系统建模,设计观测器用来观测系统状态:其次,应用基于权值、中心和宽度3个参数可调节的自适应时延模糊逻辑系统补偿器来消除建模误差和不确定性.文中证明了闭环系统满足期望的跟踪性能.示例仿真结果表明了该方案的有效性.

关键词：模糊T-S模型自适应模糊逻辑系统非线性系统不确定性时延跟踪控制

Postoperative abdominal herpes zoster complicated by intestinal obstruction:A case report

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World Journal of Clinical Cases 2024年第6期12卷 1138-1143页

作者： zhen-Yu Dong Rui-Xian Shi Xiao-Biao Song Ming-Yue du Ji-Jun Wang Department of General Surgery Baotou Central HospitalBaotou 014040Inner Mongolia Autonomous RegionChina Department of General Surgery Baotou Medical CollegeBaotou 014040Inner Mongolia Autonomous RegionChina Department of Neurology Baotou Central HospitalBaotou 014040Inner Mongolia Autonomous RegionChina Department of Neurology Inner Mongolia Medical UniversityHohhot 010110Inner Mongolia Autonomous RegionChina

BACKGROUND Intestinal obstruction is a common occurrence in clinical ***,the occurrence of herpes zoster complicated by intestinal obstruction after abdominal surgery is exceedingly *** the diagnostic and treatment process,clinicians consider it crucial to identify the primary causes of its occurrence to ensure effective treatment and avoiding *** SUMMARY Herein,we present the case of a 40-year-old female patient with intestinal obstruction who underwent laparoscopic appendectomy and developed herpes zoster after *** the patient's clinical manifestations and relevant laboratory tests,it was suggested that the varicella zoster virus reactivated during the latent period after abdominal surgery,causing herpes ***,the herpes virus invaded the visceral nerve fibers,causing gastrointestinal dysfunction and loss of intestinal peristalsis,which eventually led to intestinal *** patient was successfully treated through conservative treatment and antiviral therapy and subsequently discharged from the *** Pseudo-intestinal obstruction secondary to herpes zoster infection is difficult to distinguish from mechanical intestinal obstruction owing to various *** cases of inexplicable intestinal obstructions,considering the possibility of a viral infection is essential to minimize misdiagnosis and missed diagnoses。

关键词： Herpes zoster Pseudo-intestinal obstruction Ogilvie syndrome Peripheral motor neuropathy Case report

多输入多输出多重时延非线性系统的自适应模糊控制

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控制理论与应用 2006年第5期23卷 838-840页

作者：杜贞斌胡寿松南京航空航天大学自动化学院江苏南京210016

针对多输入多输出多重时延非线性系统,提出了一种自适应模糊跟踪控制方案．该方案有机综合了自适应控制和H∞控制.文中构建了一种自适应时延模糊逻辑系统用来逼近有多重时延的未知函数;设计了H∞补偿器来抵消模糊逼近误差和外部扰动．... 详细信息

针对多输入多输出多重时延非线性系统,提出了一种自适应模糊跟踪控制方案．该方案有机综合了自适应控制和H∞控制.文中构建了一种自适应时延模糊逻辑系统用来逼近有多重时延的未知函数;设计了H∞补偿器来抵消模糊逼近误差和外部扰动．根据跟踪误差给出了参数调节规律．构造了包含时延的李雅普诺夫函数,从而证明了误差闭环系统满足期望的H∞跟踪性能．仿真结果表明了该方案的可行性．

关键词：非线性系统时延模糊逻辑系统跟踪控制

非线性系统的模糊混合H_2/H_∞采样控制

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控制与决策 2017年第5期32卷 930-934页

作者：杜贞斌胡寿松烟台大学计算机与控制工程学院山东烟台264005 南京航空航天大学自动化学院南京210016

针对一类非线性系统,提出模糊混合H_2/H_∞采样控制方案.应用T-S模糊系统表征非线性系统,控制器是零阶保持采样信号.采用输入时延方法,闭环系统转换成连续时延系统.应用Lyapunov-Krasovskii函数和LeibnizNewton公式,由线性矩阵不等式给... 详细信息

针对一类非线性系统,提出模糊混合H_2/H_∞采样控制方案.应用T-S模糊系统表征非线性系统,控制器是零阶保持采样信号.采用输入时延方法,闭环系统转换成连续时延系统.应用Lyapunov-Krasovskii函数和LeibnizNewton公式,由线性矩阵不等式给出模糊采样控制器存在的一个新充分性条件.所提出的模糊采样控制方案在确保系统稳定意义下取得了期望的H_2/H_∞性能.通过卡车拖车系统实验验证了采样控制设计方案的可行性和有效性.

关键词： T-S模糊系统采样控制非线性系统 H2/H∞控制

Number of Solitons Emerged in the Initial Profile of Shallow Water Using Convolutional Neural Networks

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Journal of Systems Science & Complexity 2024年第2期37卷 463-479页

作者： WANG zhen CUI Shikun School of Mathematical Sciences Dalian University of TechnologyDalian 116024China School of Mathematical Sciences Beihang UniversityBeijing 100191China

The soliton resolution conjecture proposes that the initial value problem can evolve into a dispersion part and a soliton ***,the problem of determining the number of solitons that form in a given initial profile remains unsolved,except for a few specific *** this paper,the authors use the deep learning method to predict the number of solitons in a given initial value of the Korteweg-de Vries(KdV)*** leveraging the analytical relationship between Asech^(2)(x)initial values and the number of solitons,the authors train a Convolutional Neural Network(CNN)that can accurately identify the soliton count from spatio-temporal *** trained neural network is capable of predicting the number of solitons with other given initial values without any additional *** extensive calculations,the authors demonstrate the effectiveness and high performance of the proposed method.

关键词： Convolutional neural network deep learning method KdV equation soliton

Design Research of a Novel Aftercool-Humidifier Concept for Humid Air Turbine Cycle

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Journal of Thermal Science 2024年第3期33卷 951-969页

作者： ZHANG Junzheng XU zhen School of Energy and Power Engineering Shandong UniversityJi’nan250061China Shandong Engineering Laboratory for High-efficiency Energy Conservation and Energy Storage Technology&Equipment Shandong UniversityJi’nan250061China

Humid air turbine cycle(HAT)has potential of electrical efficiencies comparable to combined cycle,with lower investment cost and NO_(x) *** typical heat exchanger network of HAT consists of intercooler(if there is),aftercooler,recuperator,economizer and humidifier,which brings higher efficiency but makes the system more *** simplify HAT layout,a novel humidifier concept is proposed by integrating the aftercooler into traditional counter-current *** on this concept,a one-dimensional model including pressure drop and exergy calculation is established to distinguish the thermodynamic and hydrodynamic characteristics,and then the structural parameters,such as the number of rows and columns,tube diameter,pitch and type for a micro HAT are *** results show that the aftercool-humidifier plays the same role as original aftercooler and humidifier,and can match the in-tube air,out-tube air and water stream well with lower *** the case of micro HAT cycle,the volume of heat and mass transfer area can be reduced by 47%compared with traditional *** major thermal resistance occurred in the convection heat transfer process inside the tube;however,using enhanced tube cannot effectively improve the compactness of device.

关键词： humid air turbine cycle humidifier thermodynamic analysis one-dimensional model

Recent advances in probiotics oral delivery systems targeting the inflammatory bowel disease: Types， mechanisms and perspectives

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Food Science and Human Wellness 2024年

作者： Yaxin Yin Xiaoqun Zeng zhen Wu Qiwei du Tao Zhang Daodong Pan Ming du Maolin Tu State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-products， Ningbo University Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province， Zhejiang-Malaysia Joint Research Laboratory for Agricultural Product Processing and Nutrition， College of Food Science and Engineering， Ningbo University School of Food Science and Technology， National Engineering Research Center of Seafood， Collaborative Innovation Center of Seafood Deep Processing， Dalian Polytechnic University

Inflammatory bowel disease (IBD) influences several million people around the globe， with a high prevalence in North America and Europe. Results from the studies about host-gut microbial interactions demonstrated that gut microbiota plays a critical role in the progression of IBD， and probiotics can significantly improve microflora dysbiosis and inflammatory response caused by intestinal pathogens. However， several limitations existed for the probiotics delivered to the intestine in the free form (non-encapsulated)， such as low pH and diverse digestive enzymes in the gastrointestinal tract， etc. To overcome the problems， several probiotic delivery systems were established and verified with effects. Here， the types and applications of probiotics in animal models and clinical studies are firstly reviewed in this paper. Subsequently， various types of probiotic delivery systems are elaborated， containing the well-known microcapsules and hydrogel delivery systems， and the engineered probiotic delivery systems are also introduced. Furthermore， mechanism of action associated with probiotics are illustrated， including maintaining gut microbiota barrier balance， modulating the immune response， and alleviating oxidative stress， etc. Finally， we discussed the relative advantages and disadvantages of different encapsulation methods， as well as future trends for further development of probiotic delivery systems with health benefits.

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Effect of cerium alloying on microstructure,texture and mechanical properties of magnesium during cold-rolling process

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Journal of Rare Earths 2024年第5期42卷 1001-1008,I0007页

作者： zhen Zhang Huanhuan Chen Shiju Cao Jinhua Peng Peng Guo Chang Long Shan Wang Chang Chen Yong Wu Ji'an Huang Xiaodong du Haigen Wei School of Materials Science and Engineering Hefei University of TechnologyHefei230009China NationalLocal Joint Research Center of Non-ferrous Metal Materials and Processing Technology Hefei230009China Laboratory of Nonferrous Metal Material and Processing Engineering of Anhui Province Hefei230009China School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang212003China Institute of Industry and Equipment Technology Hefei University of TechnologyHefei230009China Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou341000China

Hot-extrusion and cold-rolling were conducted on Mg-Ce binary alloys to explore the effect of cerium(Ce)on microstructure,texture and mechanical properties of Mg *** addition of Ce results in significant grain refinement both in as-cast and hot-extruded *** basal texture is also weakened after extrusion and an inclined basal texture is formed with Ce *** strength and elongation of the Mg-Ce alloys are improved simultaneously due to such grain refinement and texture weakening *** cold-rolling,plenty of twins are found in the pure Mg and AZ31 plates while grains in the Mg-0.3Ce plate deform more uniformly without lamellar twin ***,Mg-0.3Ce alloys own strong and continuous strain hardening because Ce atoms and Mg-Ce precipitated phases serve as obstacles for dislocation slip.

关键词： Mg-Ce alloys Hot extrusion Cold-rolling Rare earths

A flexible Hf_(0.5)Zr_(0.5)O_(2) thin film with highly robust ferroelectricity

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Journal of Materiomics 2024年第1期10卷 210-217页

作者： Xiang Zhou Haoyang Sun Jiachen Li Xinzhe du He Wang zhen Luo Zijian Wang Yue Lin Shengchun Shen Yuewei Yin Xiaoguang Li Hefei National Research Center for Physical Sciences at the Microscale Department of Physicsand CAS Key Laboratory of Strongly-Coupled Quantum Matter PhysicsUniversity of Science and Technology of ChinaHefei230026China Collaborative Innovation Center of Advanced Microstructures Nanjing210093China

Flexible hafnia-based ferroelectric memories are arousing much interest with the ever-growing demands for nonvolatile data storage in wearable electronic ***,high-quality flexible Hf_(0.5)Zr_(0.5)O_(2)membranes with robust ferroelectricity were fabricated on inorganic pliable mica substrates via an atomic layer deposition *** flexible Hf_(0.5)Zr_(0.5)O_(2) thin membranes with a thickness of∼8 nm exhibit a high remanent polarization of∼16μC/cm^(2),which possess very robust polarization switching endurance(>10^(10) cycles,two orders of magnitude better than reported flexible HfO_(2)-based films)and superior retention ability(expected>10 years).In particular,stable ferroelectric polarization as well as excellent endurance and retention performance show negligible degradations under 6 mm radius bending conditions or after 10^(4) bending cycles with a 6 mm bending *** results mark a crucial step in the development of flexible hafnium oxide-based ferroelectric memories for wearable electronic devices.

关键词： Ferroelectric polarization Hf_(0.5)Zr_(0.5)O_(2) Flexibility Mica Atomic layer deposition