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The Society of Instrument and control Engineers Annual Conference 2015

作者： Zeshan Lyu Peng Yan Zhen Zhang School of Automation Science and Electrical Engineering Beihang University Key Laboratory of High-efficiency and Clean Mechanical Manufacture Ministry of Education School of Mechanical EngineeringShandong University Department of Mechanical Engineering Tsinghua University Beijing Key Lab of Precision/Ultra-Precision Manufacturing Equipment and Control Tsinghua University

This paper presents an innovative method for rejecting multiple narrow-band disturbances in nano-manipulating servo systems. The proposed control scheme consists of a robust controller and a multiple optimal phase filter structure. The baseline robust controller is synthesized with mixed sensitivity optimization for the purpose of robust stability and servo performance.A novel adaptive digital multiple optimal phase filter structure is then developed with a parallel connection, such that online estimation and suppression of the narrow-band disturbances with unknown or time-varying frequencies can be achieved without sacrificing the stability robustness of the closed-loop systems. The proposed control scheme is evaluated via simulations and implemented on a piezoelectric-actuator driven nanopositioner, where high precision positioning is demonstrated in the presence of both unmodeled dynamics and multiple disturbances.

关键词： multiple narrow-band disturbance rejection,piezoelectric-actuator driven nanopositioning,mixed sensitivity optimization

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Evacuation control of Crowds of Pedestrians: Distributed or Decentralized? ⁎

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IFAC-PapersOnLine 2020年第5期53卷 318-323页

作者： Kecai Cao YangQuan Chen Chenglin Liu Nanjing Institute of Technology Nanjing 211167 China Mechatronics Embedded Systems and Automation Lab School of Engineering University of California Merced CA USA 95343 Key Laboratory of Advanced Process Control for Light Industry (Ministry of Education) Institute of Automation Jiangnan University Wuxi 214122 China

Evacuation of crowds in a corridor with only one exit has been considered in this paper where distributed controllers have been constructed to regulate the crowd’s evacuation speed so that stampede tragedy can be avoided. Macroscopic model for crowds of pedestrians has been firstly derived based on inspiration of LWR (Lighthill-Whitham and Richards) model and Greenshields model from traffic system where finite volume method has been introduced to simplify the obtained PDEs into finite ODEs. Distributed evacuation controllers have been constructed based on inspiration of multi-agent system and stability analysis of obtained closed-loop system has been simplified to linear system with the delicate controllers proposed. Comparisons between distributed evacuation controllers and previous evacuation controllers have also been presented to show the advantages and disadvantages of different controllers under different initial density of crowds so that tragedy of crowd stampede can be effectively avoided with appropriate selection of different controllers.

关键词： Distributed evacuation controller Decentralized evacuation controller Stampede

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Discrete Time-Varying Internal Model-Based control of a Novel Parallel Kinematics Multi-Axis Servo Gantry

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IFAC Proceedings Volumes 2014年第3期47卷 2040-2045页

作者： Zhen Zhang Peng Yan Peng Wang Department of Mechanical Engineering Tsinghua University Beijing 100084 China Beijing Key Lab of Precision/Ultra-Precision Manufacturing Equipment and Control Tsinghua University 100084 China School of Automation Science and Electrical Engineering Beihang University Beijing 100191 China Key Laboratory of High-efficiency and Clean Mechanical Manufacturing Ministry of Education School of Mechanical Engineering Shandong University Jinan Shandong 250061 China

This paper presents an internal model-based approach for trajectory tracking in the discrete time-varying setting. A newly designed parallel kinematics servo gantry is well suited for high precision contouring at high speed ranges. The discrete time-varying internal model-based control is developed for controlling the servo gantry system to track complicated trajectories generated by linear time-varying systems. Based on a novel parallel time-varying internal model structure, a low order robust discrete time-varying stabilizer is synthesized. The proposed tracking control architecture is deployed on the novel parallel kinematics servo gantry system to achieve high precision contour tracking performance for frequency-varying signals generated by high order time-varying autonomous system.

关键词： Mechatrnics Tracking control Robust control

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Accurate 3-D parameterised modelling of complex milling cutter with fir-slots for rotor-groove machining

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International Journal of Manufacturing Research 2016年第4期11卷 309-321页

作者： Su, Xiang Wang, Gang Li, Jianfeng Rong, Yiming Beijing Key Lab of Precision/Ultra-Precision Manufacturing Equipment and Control Tsinghua University Beijing100084 China Key Laboratory of High Efficiency and Clean Mechanical Manufacture Shandong University Ministry of Education Jinan250001 China Mechanical and Energy Engineering Department South University of Science and Technology of China Shenzhen518055 China

Milling cutters with fir-slot (fir tree cutters) are widely used in the high speed machining of blade-root and rotor-groove. The complicated structures and multitudinous specification sizes make it difficult to achieve an accurate three-dimensional (3-D) parameterised modelling of the cutter. In this paper, the conical helix and radial cross-sectional curves are expressed mathematically based on geometric curve and surface theory. The radial geometric angles are calculated from the normal angles based on the analysis of the relationship between radial section and normal section. Finally, rapid computer aided engineering (CAE) software are realised. The results show that the established mathematical model can efficiently express the fir tree cutters, which improves the efficiency and accuracy of cutter design. Copyright © 2016 Inderscience Enterprises Ltd.

关键词： Parameterization

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Analysis of the bullwhip effect in two parallel supply chains with interacting price-sensitive demands

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European Journal of Operational Research 2015年第3期243卷 815-825页

作者： Yungao Ma Nengmin Wang Zhengwen He Jizhou Lu Huigang Liang School of Management Xi'an Jiaotong University Xianning Road Xian Shaanxi 710049 No. 28 China The Key Lab of the Ministry of Education for Process Control & Efficiency Engineering Xianning Road Xian Shaanxi 710049 No. 28 China State Grid Energy Research Institute Changping District 102209 Beijing China Department of Management Information Systems College of Business East Carolina University Greenville NC 27858 USA

This paper offers insights into how the bullwhip effect in two parallel supply chains with interacting price-sensitive demands is affected in contrast to the situation of a single product in a serial supply chain. In particular, this research studies two parallel supply chains, each consisting of a manufacturer and a retailer, and the external demand for a single product depends on its price and the other's price in a situation in which each price follows a first-order autoregressive process. In this paper, we propose an analytical framework that incorporates two parallel supply chains, and we explore their interactions to determine the bullwhip effect. We identify the conditions under which the bullwhip effect is amplified or lessened with interacting price-sensitive demands relative to the situation without interaction.

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Competition and Cooperation Mechanism Between Agency Selling and Wholesale: An Application of the Emerging E-commerce Model

Competition and Cooperation Mechanism Between Agency Selling...

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IEEE International Conference on Industrial engineering and engineering Management

作者： Haonan Wang C. K. M. Lee Ping Ji Gang Li Department of Industrial and Systems Engineering The Hong Kong Polytechnic University Hong Kong China Laboratory for Artificial Intelligence in Design Hong Kong Science Park New Territories Hong Kong SAR China School of Intelligent Finance and Business XJTLU Entrepreneur College (Taicang) Xi'an Jiaotong - Liverpool University China School of Management Xi'an Jiaotong University The State Key Lab for Manufacturing Systems Engineering The Key Lab of the Ministry of Education for Process Control and Efficiency Engineering Xi'an China

Recently, the platform economy allows enterprises to collaborate with business partners and provide additional channels for various parties. E-commerce platforms have become integral channels for connecting suppliers with consumers. In the platform economy, agency selling and reselling are two predominant sales models that often coexist for the same product types, resulting in a competitive relationship. This study analyzes transaction data for 30,000 Stock Keeping Units (SKUs) provided by the Chinese e-commerce platforms over one month. We employ three models to compare the sales quantity and profits of manufacturers and online platforms and to identify the most efficient mode for stakeholders based on the model establishment and empirical evidence. Our findings suggest that apart from the existing channel to provide products to customers, manufacturers enter the platform which will increase the profit of platform operators. On the other hand, platform operators may also affect the profit of the manufacturers.

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Anti-asthmatic mechanism of the Huashanshen dripping pill via suppressing contraction of the airway smooth muscle

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Traditional Medicine Research 2022年第3期7卷 19-27页

作者： Yu Liu Ni-Na Cui Xuan-Shuo Liu Peng-Cheng Lin Lorenzo Pecoraro Giuseppe Venturella Shu-Li Man Wen-Yuan Gao The Innovation Platform for the Development and Construction of Special Project of Key Laboratory for Tibet Plateau Phytochemistry of Qinghai Province(2017-ZJ-Y19) College of pharmacyQinghai Nationalities UniversityXining 810007China State Key Laboratory of Food Nutrition and Safety Key Laboratory of Industrial MicrobiologyMinistry of EducationTianjin Key Laboratory of Industry MicrobiologyNational and Local United Engineering Lab of Metabolic Control Fermentation TechnologyChina International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal ChemistryCollege of BiotechnologyTianjin University of Science&TechnologyTianjin 300457China Tianjin Key Laboratory for Modern Drug Delivery and High Efficiency School of Pharmaceutical Science and TechnologyTianjin UniversityTianjin 300072China Department of Agricultural Food and Forest SciencesUniversity of PalermoPalermoItaly

Background:The Huashanshen(HSS)dripping pill has been widely used in asthma for a long time in ***,the relaxant mechanism of HSS is not well ***:In this report,high performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry was used to identify the constituents in rat plasma after oral administration of ***-sensitized allergic asthma and isolated trachea were studied for the anti-asthmatic mechanism of ***:D-anisodamine,L-anisodamine,scopolamine and atropine were detected in the rat plasma containing *** was clear that the HSS inhibited the release of inflammatory mediators,regulated the balance of T-helper 1 and T-helper 2 to reduce the airway inflammation,and relaxed the tracheal smooth muscle by controlling the KCa channel,Ca^(2+)influx and release to reduce the airway ***:Atropine,anisodamine and scopolamine might be active compounds of HSS which inhibited the release of inflammatory mediators,regulated the balance of Th1/Th2,and relaxed the tracheal smooth muscle to reduce airway hyperresponsiveness.

关键词： Huashanshen dripping pill HPLC-QTOF-MS allergic asthma airway remodeling inflammation airway smooth muscle

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The 2022 report of synergetic roadmap on carbon neutrality and clean air for China:Accelerating transition in key sectors

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Environmental Science and Ecotechnology 2024年第3期19卷 4-18页

作者： Yu Lei Zhicong Yin Xi Lu Qiang Zhang Jicheng Gong Bofeng Cai Cilan Cai Qimin Chai Huopo Chen Renjie Chen Shi Chen Wenhui Chen Jing Cheng Xiyuan Chi Hancheng Dai Xiangzhao Feng Guannan Geng Jianlin Hu Shan Hu Cunrui Huang Tiantian Li Wei Li Xiaomei Li Jun Liu Xin Liu Zhu Liu Jinghui Ma Yue Qin Dan Tong Xuhui Wang Xuying Wang Rui Wu Qingyang Xiao Yang Xie Xiaolong Xu Tao Xue Haipeng Yu Da Zhang Ning Zhang Shaohui Zhang Shaojun Zhang Xian Zhang Xin Zhang Zengkai Zhang Bo Zheng Yixuan Zheng Jian Zhou Tong Zhu Jinnan Wang Kebin He Center of Air Quality Simulation and System Analysis Chinese Academy of Environmental PlanningBeijing100041China Center for Carbon Neutrality Chinese Academy of Environmental PlanningBeijing100041China Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science&TechnologyNanjing210044China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Institute for Carbon Neutrality Tsinghua UniversityBeijing100084China Ministry of Education Key Laboratory for Earth System Modelling Department of Earth System ScienceTsinghua UniversityBeijing100084China State Key Joint Laboratory for Environment Simulation and Pollution Control College of Environmental Sciences and Engineering and Center for Environment and HealthPeking UniversityBeijing100871China National Center for Climate Change Strategy and International CooperationBeijing100035China Nansen-Zhu International Research Centre Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing100029China School of Public Health Key Lab of Public Health Safety of the Ministry of Education and Key Lab of Health Technology Assessment of the Ministry of HealthFudan UniversityShanghai200032China School of Economics and Management Beijing University of Chemical TechnologyBeijing100029China Department of Earth System Science University of CaliforniaIrvineCA92697USA National Meteorological Center China Meteorological AdministrationBeijing100081China College of Environmental Sciences and Engineering Peking UniversityBeijing100871China Policy Research Center for Environment and Economy Ministry of Ecology and Environment of the People's Republic of ChinaBeijing100029China Jiangsu Key Laboratory of Atmospheric Environment Monitoring

China is now confronting the intertwined challenges of air pollution and climate *** the high synergies between air pollution abatement and climate change mitigation,the Chinese government is actively promoting synergetic control of these two *** Synergetic Roadmap project was launched in 2021 to track and analyze the progress of synergetic control in China by developing and monitoring key *** Synergetic Roadmap 2022 report is the first annual update,featuring 20 indicators across five aspects:synergetic governance system and practices,progress in structural transition,air pollution and associated weather-climate interactions,sources,sinks,and mitigation pathway of atmospheric composition,and health impacts and benefits of coordinated *** to the comprehensive review presented in the 2021 report,the Synergetic Roadmap 2022 report places particular emphasis on progress in 2021 with highlights on actions in key sectors and the relevant *** milestones include the proportion of non-fossil power generation capacity surpassing coal-fired capacity for the first time,a decline in the production of crude steel and cement after years of growth,and the surging penetration of electric ***,in 2022,China issued the first national policy that synergizes abatements of pollution and carbon emissions,marking a new era for China's pollution-carbon *** changes highlight China's efforts to reshape its energy,economic,and transportation structures to meet the demand for synergetic control and sustainable ***,the country has witnessed a slowdown in carbon emission growth,improved air quality,and increased health benefits in recent years.

关键词： Synergetic roadmap Carbon neutrality Clean air

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Transcriptome analysis of unsaturated fatty acids biosynthesis shows essential genes in sprouting of Acer truncatum Bunge seeds

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Food Bioscience 2021年 41卷

作者： Chen, Dong-Ju Luo, Xue-Gang Yan, Li-Hua Si, Chuan-Ling Wang, Nan He, Hong-Peng Zhang, Tong-Cun Key Lab of Industrial Fermentation Microbiology of the Ministry of Education Tianjin Key Lab of Industrial Microbiology College of Biotechnology Tianjin University of Science and Technology Tianjin 300457 China Tianjin Engineering Research Center of Microbial Metabolism and Fermentation Process Control Tianjin 300457 China Tianjin Key Laboratory of Pulp & Paper Tianjin University of Science & Technology Tianjin 300457 China

The seeds of Acer truncatum Bunge (ATB) are rich in unsaturated fatty acids (UFA), especially nervonic acid, an important nutrient for the growth and maintenance of the brain. Therefore, the oil of ATB seeds has been approved as a New Resource Food in China. In the present study, changes of transcriptomic profiling and contents of UFA during the sprouting of ATB seeds were analyzed. The results of RNA-seq-based transcriptome analysis showed that the transcription of genes in various metabolic pathways, including the biosynthesis pathway of UFA, were significantly altered during seed sprouting. The gas chromatography-mass spectrometry assay consistently showed that the content of palmitoleic acid, palmitic acid, stearic acid, gondoic acid, arachidic acid, behenic acid, nervonic acid and lignoceric acid increased 77.9, 20.9, 39.6, 26.3, 95.6, 80.0, 41.7 and 141%, respectively, while the content of oleic acid decreased 49.2%, after sprouting. The whole coding sequence regions of genes involved in the UFA biosynthesis were cloned and sequenced, and the alignment analysis predicted that omega-6 fatty acid desaturase and short-chain type dehydrogenase/reductase might have important roles in the biosynthesis of UFA during the sprouting. The results suggested that nervonic acid could be enriched in ATB seeds via sprouting-stimulation, which had not been previously observed. © 2020

关键词： Acer truncatum Bunge Bioinformatics analysis Cloning Transcriptome sequencing Unsaturated fatty acids Yuanbao maple

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Influence of Riboflavin on the Corrosion of X80 Pipeline Steel by Sulfate Reducing Bacteria

SSRN

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SSRN 2023年

作者： Fu, Lei Lin, Li Yan, Shisen Luo, Yunrong Zhang, Yingqian Lai, Sheng Wang, Zhengguo Tan, Mingxing School of Mechanical Engineering Sichuan University of Science & Engineering Zigong643000 China Failure Mechanics and Engineering Disaster Prevention Key Lab of Sichuan Province Sichuan University Chengdu610065 China Key Laboratory of Deep Earth Science and Engineering Sichuan University Ministry of Education Chengdu610065 China School of Material Science and Engineering Sichuan University of Science & Engineering Zigong643000 China Vanadium and Titanium Resource Comprehensive Utilization Key Laboratory of Sichuan Province Panzhihua617000 China Sichuan Provincial Key Lab of Process Equipment and Control Zigong643000 China School of Civil Engineering Sichuan University of Science & Engineering Zigong643000 China

Sulfate reducing bacteria (SRB) are facultative anaerobic, and the electron transfer process of their growth and metabolic activities is as follows: the electrons released from the metal surface pass through the cell wall into the cell by extracellular electron transfer, and the electron shuttle to the body plays the role of electron transfer between cells and metals. In this study, the effect of riboflavin (RF) as an electron shuttle on SRB corrosion of X80 pipeline steel was analyzed. The results showed that the addition of 10 ppm RF to the SRB medium did not significantly change the type of corrosion products, but resulted in an enlarged corrosion pit area and an increased pit depth. The corrosion weight loss rate of the SRB + 10 ppm RF system is about 3 times that of the SRB system, and the corrosion current density of the polarization curve is about 38% higher than that of the SRB system. Therefore, RF can transfer the electrons released by iron oxidation to the cytoplasm by means of electron transfer across the cell wall, thereby accelerating the corrosion of X80 steel. This further proves that the electronic medium RF can accelerate the microbial influenced corrosion (MIC) caused by SRB. © 2023, The Authors. All rights reserved.

关键词： Electron transport properties

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