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Hybrid intelligent PID control design for PEMFC anode system

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第4期9卷 552-557页

作者： Rui-min WANG ying-ying ZHANG Guang-yi CAO Fuel Cell Institute Department of Automation Shanghai Jiao Tong University Shanghai 200030 China Institute of Oceanographic Instrument Shandong Academy of Science Qingdao 266001 China

Control design is important for proton exchange membrane fuel cell (PEMFC) generator. This work researched the anode system of a 60-kW PEMFC generator. Both anode pressure and humidity must be maintained at ideal levels during steady operation. In view of characteristics and requirements of the system, a hybrid intelligent PID controller is designed specifically based on dynamic simulation. A single neuron PI controller is used for anode humidity by adjusting the water injection to the hydrogen cell. Another incremental PID controller, based on the diagonal recurrent neural network (DRNN) dynamic identification, is used to control anode pressure to be more stable and exact by adjusting the hydrogen flow rate. This control strategy can avoid the coupling problem of the PEMFC and achieve a more adaptive ability. Simulation results showed that the control strategy can maintain both anode humidity and pressure at ideal levels regardless of variable load, nonlinear dynamic and coupling characteristics of the system. This work will give some guides for further control design and applications of the total PEMFC generator.

关键词： Proton exchange membrane fuel cell (PEMFC) Anode system Single neuron Diagonal recurrent neural network (DRNN) PID controller

On textile biomedical engineering

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Science China(Technological Sciences) 2019年第6期62卷 945-957页

作者： LI yi ZHANG Xin ying BaoAn College of Textile Science and Engineering Xi'an Polytechnic University Xi'an 710048 China School of Materials The University of Manchester Manchester Ml3 9PL United Kingdom Research Center of Clothing Engineering and Technology Apparel and Art Design College Xi'an Polytechnic University Xi'an 710048 China

The demand for advanced fiber biomaterials and medical devices has risen rapidly with the increasing of aging population in the world. To address this grand societal challenge, textile biomedical engineering(TBE) has been defined as a holistic and integrative approach of designing and engineering advanced fiber materials for fabricating textile structures and devices to achieve various functions such as drug delivery, tissue engineering and artificial implants, pressure therapy and thermal therapy,bioelectric/magnetic detection and stimulation for the medical treatment and rehabilitation of human body. TBE is multidisciplinary in nature and needs integration of cross disciplinary expertise in medical science, healthcare professionals, physiologists, scientists and engineers in chemistry, materials, mechanics, electronics, computing, textile and designers. Engineering fiber materials and designing textile devices for biomedical applications involve the integration of the fundamental research in physics, chemistry, mathematics, and computational science with the development of engineering principles and understanding on the relationship between textile materials/devices and human physiology, behaviour, medicine and health. Theoretical concepts have been advanced together with creating new knowledges created from molecules to cells, organs and body-textile systems, and developing advanced fiber materials, innovative textile devices and functional apparel products for healthcare,comfort, protection against harmful external environment, diseases prevention, diagnosis and treatment, as well as rehabilitations. A holistic, integrative and quantitative approach has been adopted for deriving the technical solutions of how to engineer fibers and textiles for the benefits of human health. This paper reviews the theoretical foundations for textile biomedical engineering and advances in the recent years.

关键词： biomaterials fibers textile biomedical engineering healthcare smart functions nano

Metabolic reprogramming in cancer: the bridge that connects intracellular stresses and cancer behaviors

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National Science Review 2020年第8期7卷 1270-1273页

作者： yi Zhou Huiyan Sun ying Xu Cancer Systems Biology Center The China-Japan Union Hospital Department of Biochemistry and Molecular Biology University of Georgia School of Artificial Intelligence Jilin University

Extensive changes in cellular metabolisms have been observed in cancer. They are probably induced by the same intracellular stressor, persistent off-balance in intracellular p H across possibly all adult cancers. It is these altered metabolisms that gives rise to a variety of cancerous behaviors such as continuous cell division, metastasis and drug resistance.

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Effects of Vertex Activity and Self-organized Criticality Behavior on a Weighted Evolving Network

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Communications in Theoretical Physics 2008年第8期50卷 421-424页

作者： ZHANG Gui-Qing YANG Qiu-ying CHEN Tian-lun Department of Physics Nankai University Tianjin 300071 China

Effects of vertex activity have been analyzed on a weighted evolving *** network is characterized by the probability distribution of vertex strength,each edge weight and evolution of the strength of vertices with different vertex *** model exhibits self-organized criticality *** probability distribution of avalanche size for different network sizes is also *** addition,there is a power law relation between the size and the duration of an avalanche and the average of avalanche size has been studied for different vertex activities.

关键词： weighted evolving network vertex activity power-law self-organized criticality

Unraveling the mechanism of action of Shangxia Liangji formula for treating insomnia:a metabolomics and network pharmacology approach

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Traditional Medicine Research 2025年第2期10卷 16-29页

作者： Xia-Jie Quan Hao Liang Yong-Hong Tang Li Jiang Xiong-ying Ji Feng-ying Zhang Ping Zhang Bo Ouyang Department of Information The Affiliated Nanhua HospitalHengyang Medical SchoolUniversity of South ChinaHengyang 421002China Department of Neurology The Affiliated Nanhua HospitalHengyang Medical SchoolUniversity of South ChinaHengyang 421002China Department of Gastroscopy The Affiliated Nanhua HospitalHengyang Medical SchoolUniversity of South ChinaHengyang 421002China Department of Traditional Chinese Medicine The Affiliated Nanhua HospitalHengyang Medical SchoolUniversity of South ChinaHengyang 421002China

Background:Insomnia is a prevalent clinical condition and Shangxia Liangji formula(SXLJF)is a well-established method of ***,the specific mechanism of action of SXLJF remains ***:The mouse model of insomnia was established by intraperitoneal injection of ***-two mice were randomly divided into a negative control group,model group,SXLJF group(18.72 g/kg/day),and positive control group(diazepam,2 mg/kg)and treated with the corresponding drugs for 7 consecutive *** open field test and pentobarbital-induced sleeping test were ***-MS-based untargeted metabolomics and network pharmacology were applied to explore the potential targets of SXLJF for treating ***,key targets were validated using ***:Behavioral tests demonstrated that SXLJF reduced the total distance,average velocity,central distance,and sleep latency,and prolonged sleep *** and network pharmacology revealed potential targets,signaling pathways,metabolic pathways,and metabolites associated with the anti-insomnia effects of ***,tyrosine hydroxylase(TH)and tyrosine metabolism emerged as crucial metabolic pathways and targets,***-qPCR results supported the role of TH in the mechanism of SXLJF in treating ***:In conclusion,TH and tyrosine metabolism may represent significant targets and pathways for SXLJF in treating insomnia.

关键词： Shangxia Liangji formula insomnia metabolomics network pharmacology tyrosine hydroxylase tyrosine metabolism

Wave Radiation by A Submerged Ring Plate in Water of Finite Depth

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China Ocean Engineering 2019年第6期33卷 660-672页

作者： CONG Pei-wen LIU ying-yi GOU ying TENG Bin State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China Department of Civil and Environmental Engineering National University of Singapore117576Singapore Research Institute for Applied Mechanics Kyushu UniversityKasugaFukuoka 816-8580Japan

A plate submerged at a certain depth underneath the sea surface has been proposed as a structure type for different purposes, including motion response reduction, wave control, and wave energy harvesting. In the present study, the three-dimensional wave radiation problem is investigated in the context of the linear potential theory for a submerged ring plate in isolation or attached to a floating column as an appendage. In the latter case, the ring plate is attached at a certain distance above the column bottom. The structure is assumed to undergo a heave motion. An analytical model is developed to solve the wave radiation problem via the eigenfunction expansion method in association with the region-matching technique. With the velocity potential being available, the hydrodynamic coefficients, such as added mass and radiation damping, are obtained through the direct pressure integration. An alternative solution of radiation damping has also been developed in this study, in which the radiation damping is related to the Kochin function in the wave radiation problem. After validating the present model, numerical analysis is performed in detail to assess the influence of various plate parameters, such as the plate size and submergence depth. It is noted that the additional added mass due to the attached ring plate is larger than that when the plate is in isolation. Meanwhile, the radiation damping of the column for the heave motion can vanish at a specific wave frequency by attaching a ring plate, corresponding to a condition that there exist no progressive waves in the exterior region.

关键词： compound structure hydrodynamic coefficients ring plate zero radiation damping

Well-dispersed Sb particles embedded on N-doped carbon nanofibers toward high-performance Li-ion battery

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Rare Metals 2024年第7期43卷 2994-3006页

作者： ying Li yi-Han Zhao Lu-Lu Zhao Peng-Fei Wang ying Xie Ting-Feng yi School of Materials Science and Engineering Northeastern UniversityShenyang 110819China Key Laboratory of Dielectric and Electrolyte Functional Material Hebei Province School of Resources and MaterialsNortheastern University at QinhuangdaoQinhuangdao 066004China Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China

The alloy-type material Sb is widely used in the anode materials of lithium-ion batteries(LIBs)due to its high theoretical specific ***,its serious volume expansion problem during alloying/dealloying of Li~+limits its practical *** this work,C-Sb composite was constructed as anode material of LIBs by electrospinning route for the first time,Sb was introduced into the polyacrylonitrile-based hard carbon and coal tar pitch-based soft carbon composite amorphous carbon fiber with a diameter of 300-600 nm,which realized high cycling *** C-Sb-2(the mass ratio of polyacrylonitrile to Sb source is 1:2)electrode displayed charge capacities of 1098.5,930.3,841.7,753.5,643.9 and 545.8 mAh·g^(-1)at 0.1,0.2,0.3,0.5,1 and 2 A·g^(-1),*** when the current density returned to 0.1 A·g^(-1),the charge capacity was 939.3 mAh·g^(-1),revealing good stability and *** introduction of Sb into the amorphous carbon improved its conductivity and addressed the volume expansion issue of high specific capacity Sb during charge/***-situ XRD analysis confirmed the high reversibility of the C-Sb-2 during charging and *** functional theory(DFT)calculations revealed the gradual enhancement of the interface interaction between Sb_(x)Li_(y) and amorphous carbon(AMC)with increasing lithium content,contributing to the anchoring of alloy nanoparticles on the AMC surface and buffering the volume change of the ***,the gradual lithiation of Sb facilitated the electron transfer from Sb_(x)Li_(y) to *** findings hold promise for designing lithium storage materials with exceptional performance,highlighting the potential of C-Sb composites as anode materials for efficient next-generation lithium storage.

关键词： Li-ion battery Metallic Sb Carbon Electrospinning Cycling stability

Spatial distribution of mountainous regions and classifications of economic development in China

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Journal of Mountain Science 2016年第6期13卷 1120-1138页

作者： FANG yi-ping ying Bin Institute of Mountain Hazards&Environment Chinese Academy of SciencesChengdu 610041China Guizhou Normal University Guiyang 550001China

China is a mountainous country with a great diversity of landform and *** diversity underlines the need for regionalization and *** study defines the mountain terrains and regions with three criteria-elevation,relative height,and slope,and examines the extent of mountainous regions by using county as the basic administrative *** to the three parameters of economic base,resident income and development potential,we classified the economic development level in mountainous regions of *** findings reveal that the extent of the mountainous region accounts for 74.9% of the China's Mainland's total *** economic development of mountainous regions in China is classified into 4 main types and 23 subtypes.

关键词： Mountain terrain Mountainous region Classification system Economic development China

特殊高浓度污水电化学氧化预处理技术研究及应用

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石油炼制与化工 2025年第1期56卷 146-153页

作者：田颖中科(广东)炼化有限公司广东湛江524012

针对某石化企业特殊高浓度污水储存及处理的安全环保问题,开展了以电化学氧化为主的预处理试验研究。小试试验确定了阳极和阴极材料,以及电解参数。侧线试验结果表明:在多种配比来水情况下,采用以电化学氧化为主的预处理技术时,氨氮去... 详细信息

针对某石化企业特殊高浓度污水储存及处理的安全环保问题,开展了以电化学氧化为主的预处理试验研究。小试试验确定了阳极和阴极材料,以及电解参数。侧线试验结果表明:在多种配比来水情况下,采用以电化学氧化为主的预处理技术时,氨氮去除率大于93%,化学需氧量(COD)降低率大于45%。在分析、解决了工程化放大的难题后,工业化装置稳定运行7个月,在来水稳定的情况下,出水氨氮质量浓度小于35 mg/L,COD小于1000 mg/L,满足预处理出水要求。该研究解决了高浓度储存废水处理的难题。

关键词：特殊高浓度污水电化学氧化预处理技术化学需氧量氨氮