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Two-Stage OD Flow Prediction for Emergency in Urban Rail Transit

IEEE Transactions on Intelligent Transportation systems 2024年第1期25卷 920-928页

作者： Zhu, Guangyu Ding, Jiacun Wei, Yun Yi, Yang Xu, Sendren Sheng-Dong Wu, Edmond Q. Beijing Jiaotong University Key Lab. of Transport Industry of Big Data Application Technologies for Comprehensive Transport The Beijing Research Center of Urban Traffic Information Sensing and Service Technologies Beijing100044 China Beijing Mass Transit Railway Operation Corporation Ltd. Beijing100014 China Yangzhou University College of Information Engineering Yangzhou225127 China National Taiwan University of Science and Technology Automation and Control Center The Graduate Institute of Automation and Control Taipei106335 Taiwan Shanghai Jiao Tong University Key Laboratory of System Control and Information Processing Ministry of Education of China The Shanghai Engineering Research Center of Intelligent Control and Management Department of Automation Shanghai200240 China

Urban rail transit (URT) is vulnerable to natural disasters and social emergencies including fire, storm and epidemic (such as COVID-19), and real-time origin-destination (OD) flow prediction provides URT operators with important information to ensure the safety of URT system. However, hindered by the high dimensionality of OD flow and the lack of supportive information reflecting the real-time passenger flow changes, study in this area is at the beginning stage. A novel model consisting of two stages is proposed for OD flow prediction. The first stage predicts the inflows of all stations by Long Short-Term Memory (LSTM) in real time, where the dimension is reduced compared with predicting OD flows directly. In the second stage, the notion of separation rate, namely, the proportion of inbound passengers bounding for another station, is estimated. Finally, The OD flow is predicted by multiplying the inflow and separation rate. Experiments based on Hangzhou Metro dataset show the proposed model outperforms the contrast model in weighted mean average error (WMAE) and weighted mean square error (WMSE). Results also suggest that the proposed prediction model performs better on weekdays than on weekends, and with greater accuracy on larger OD flows. © 2000-2011 IEEE.

关键词： Forecasting

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Synchronization control of biaxial electric coordination

Synchronization control of biaxial electric coordination

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International Conference on Computer and Automation engineering, ICCAE

作者： Wangyong He Xiaoqi Tang Liu Yang National Numerical Control System Engineering Research Center HuaZhong University of Science and Technology WuHan People's Republic of China Faculty of Mechanical & Electronic Information China University of Geosciences Wuhan People's Republic of China

With the aim of improving the performance of biaxial electric coordination, in this paper, a new synchronization control method is proposed. The effectiveness of the proposed method is examined by simulation and experiments on a machine tool controlled by a CNC system based on fieldbus servo driver. The experimental results show that synchronization error is decreased obviously in the adopted method.

关键词： Servomotors Servomechanisms Fasteners Machine tools Motion control Computer numerical control Proportional control Equations Programmable control Adaptive control

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Bridging the structure gap between pellets in artificial dissolution media and in gastro-intestinal tract in rats

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Acta Pharmaceutica Sinica B 2022年第1期12卷 326-338页

作者： Hongyu Sun Siyu He Li Wu Zeying Cao Xian Sun Mingwei Xu Shan Lu Mingdi Xu Baoming Ning Huimin Sun Tiqiao Xiao Peter York Xu Xu Xianzhen Yin Jiwen Zhang School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai 201418China Center for Drug Delivery System Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201210China University of Chinese Academy of Sciences Beijing 100049China School of Materials Science and Engineering Center for Supramolecular Chemistry and CatalysisDepartment of ChemistryShanghai UniversityShanghai 200444China NMPA Key Laboratory for Quality Research and Evaluation of Pharmaceutical Excipients National Institutes for Food and Drug ControlBeijing 100050China National Institutes for Food and Drug Control Beijing 100050China Shanghai Synchrotron Radiation Facility/Zhangjiang Lab Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Center for MOST and Image Fusion Analysis Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201210China

Changes in structure of oral solid dosage forms(OSDF) elementally determine the drug release and its therapeutic *** this research,synchrotron radiation X-ray micro-computed tomography was utilized to visualize the 3 D structure of enteric coated pellets recovered from the gastrointestinal tract of *** structures of pellets in solid state and in vitro compendium media were *** in vivo underwent morphological and structural changes which differed significantly from those in vitro compendium ***,optimizations of the dissolution media were performed to mimic the appropriate in vivo conditions by introducing pepsin and glass microspheres in *** sphericity,pellet volume,pore volume and porosity of the in vivo esomeprazole magnesium pellets in stomach for2 h were recorded 0.47,1.55 × 10^(8)μm^(3),0.44 × 10^(8)μm^(3)and 27.6%,*** adding pepsin and glass microspheres,the above parameters in vitro reached to 0.44,1.64 × 10^(8)μm^(3)0.38 × 10^(8)μm^(3)and 23.0%,*** magnesium pellets behaved *** structural features of pellets between in vitro media and in vivo condition were bridged successfully in terms of 3 D structures to ensure better design,characterization and quality control of advanced OSDF.

关键词： Internal 3D structure 3D reconstruction Structural parameter Enteric coated pellets Synchrotron radiation X-ray micro computed tomography In vivo and in vitro structure correlation Esomeprazole magnesium Omeprazole magnesium

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A receding horizon control approach to synchronization for chaotic systems

A receding horizon control approach to synchronization for c...

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ICROS-SICE International Joint Conference 2009, ICCAS-SICE 2009

作者： Choon, Ki Ahn Jung, Hun Park Moon, Kyu Song Chul, Dong Lee Division of Electronic and Control Engineering Wonkwang University Iksan Korea Republic of BK21 School for Creative Engineering Design of Next Generation Mechanical and Aerospace Systems Seoul National University Seoul Korea Republic of Jeonbuk Embedded System Research Center Korea Electronics Technology Institute Korea Republic of

ISBN: (纸本)9784907764333

In this paper, we propose a receding horizon control approach to synchronization for chaotic systems. A new matrix inequality condition on the terminal weighting matrix is proposed for chaotic systems under which nonincreasing monotonicity of the optimal cost is guaranteed. It is shown that the proposed terminal inequality condition guarantees the closed-loop stability of the receding horizon synchronization (RHS) method for chaotic systems. As an application of the proposed method, the RHS problem for Chua's chaotic system is investigated. © 2009 SICE.

关键词： Linear matrix inequalities

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Fault Diagnosis of On-board Equipment in CTCS-3 Based on CNN-LSTM Model

Fault Diagnosis of On-board Equipment in CTCS-3 Based on CNN...

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Chinese Automation Congress (CAC)

作者： Daqian Zhang Yuan Cao Miao Zhang Ming Chai Jidong Lv National Engineering Research Center of Rail Transportation Operation and Control System Beijing Jiaotong University Beijing China National Research Center of Railway Intelligence Transportation System Engineering Technology China Academy of Railway Sciences Corporation Limited Beijing China

Data-driven methods based on deep learning have achieved remarkable results of fault diagnosis of train control system due to their superiority in feature extraction. However, it still faces uneven data distribution problem, which afects the detection accuracy of fault diagnosis. In this paper, by considering different failures both in system and subsystem level of train control system, we propose a novel two-stages fault diagnosis method based on a combination of Convolutional Neural Network (CNN) and Long Short-Term Memory Network (LSTM). Firstly, samples are obtained by segmenting and vectorizing the text form faulty data set, and fed into the proposed CNN-LSTM model. Then, in the first stage, the features of the processed data are extracted through the CNN layer, whereas the correlation between the sample data are derived through the LSTM layer. Thus, the classification of first-level faults, respect as system level, are realized with high accuracy of diagnosis. Finally, in the second stage, to solve the problem of data imbalance, we reconsider part of data from the CNN layer, and put them into the new LSTM layer for secondary faults diagnosis. We apply this method on a real CTCS-3 On-board equipment and the experimental results show that the accuracy rate of our proposed model reaches 96.7% and the accuracy of small data faults is also higher when compare with other neural network models,such as TextCNN, ANN, LSTM and RNN.

关键词： Fault diagnosis Deep learning Recurrent neural networks Feature extraction control systems Data models Convolutional neural networks

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The impact of the atmospheric turbulence-development tendency on new particle formation: a common finding on three continents

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national Science Review 2021年第3期8卷 140-150页

作者： Hao Wu Zhanqing Li Hanqing Li Kun Luo Yuying Wang Peng Yan Fei Hu Fang Zhang Yele Sun Dongjie Shang Chunsheng Liang Dongmei Zhang Jing Wei Tong Wu Xiaoai Jin Xinxin Fan Maureen Cribb Marc L.Fischer Markku Kulmala Tuukka Pet?j? State Key Laboratory of Remote Sensing Science College of Global Change and Earth System ScienceBeijing Normal University ESSIC and Department of Atmospheric Science University of MarylandCollege Park State Key Laboratory of Clean Energy Utilization Zhejiang University School of Atmospheric Physics Nanjing University of Information Science and Technology Meteorological Observation Center China Meteorological Administration State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry Institute of Atmospheric Physics Chinese Academy of Sciences State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Lawrence Berkeley National Laboratory Institute for Atmospheric and Earth System Research/Physics Faculty of ScienceUniversity of Helsinki Aerosol and Haze Laboratory Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology Joint International Research Laboratory of Atmospheric and Earth System Sciences School of Atmospheric Sciences Nanjing University

A new mechanism of new particle formation(NPF) is investigated using comprehensive measurements of aerosol physicochemical quantities and meteorological variables made in three continents,including Beijing,China;the Southern Great Plains site in the USA;and SMEAR Ⅱ Station in Hyytiala,Finland.D espite the considerably different emissions of chemical species among the sites,a common relationship was found between the characteristics of NPF and the stability *** stability parameter(ζ=Z/L,where Z is the height above ground and L is the Monin-Obukhov length) is found to play an important role;it drops significantly before NPF as the atmosphere becomes more unstable,which may serve as an indicator of nucleation *** the atmosphere becomes unstable,the NPF duration is closely related to the tendency for turbulence development,which influences the evolution of the condensation ***,the unstable atmosphere may dilute pre-existing particles,effectively reducing the condensation sink,especially at coarse mode to foster *** new mechanism is confirmed by model simulations using a molecular dynamic model that mimics the impact of turbulence development on nucleation by inducing and intensifying homogeneous nucleation events.

关键词： new particle formation turbulence development molecular dynamic

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The effective thermal conductivity of a screen-printed thermoelectric film of Bi 2 Te 3 and CsSnI 3

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International Journal of Heat and Mass Transfer 2025年 250卷

作者： Koji Miyazaki Anjum Mustafa Ajay Kumar Baranwal Shrikant Saini Kosuke Watanabe Asuka Miura Tomohide Yabuki Manabu Ishimaru Shoya Kawano Qing Wang Satoshi Iikubo Qing Shen Shuzi Hayase Department of Mechanical Engineering Kyushu University 744 Motooka Nishi-ku Fukuoka Fukuoka 819-0395 Japan Department of Mechanical and Control Engineering Kyushu Institute of Technology 1-1 Sensui-cho Tobata-ku Kitakyushu Fukuoka 804-8550 Japan Department of Electronics & Communication Engineering Madan Mohan Malaviya University of Technology Gorakhpur Uttar Pradesh 273010 India Department of Creative Engineering National Institute of Technology Kitakyushu College 5-20-1 Shii Kokuraminami-ku Kitakyushu Fukuoka 802-0985 Japan Department of Materials Science and Engineering Kyushu Institute of Technology 1-1 Sensui-cho Tobata-ku Kitakyushu Fukuoka 804-8550 Japan Department of Electronic Engineering Kyushu Institute of Technology 1-1 Sensui-cho Tobata-ku Kitakyushu Fukuoka 804-8550 Japan Department of Advanced Materials Science and Engineering Kyushu University 6-1 Kasuga-koen Kasuga Fukuoka 816-8580 Japan i-Powered Energy System Research Center (i-PERC) The University of Electro-Communications

In recent years, printed thermoelectric thin films have attracted attention due to their advantages in enabling large-area and flexible designs. We developed printable thermoelectric composites of bismuth telluride and halide perovskite, which were expected to exhibit superior thermoelectric properties compared to other printable materials, such as conductive organic materials. The measured dimensionless figure of merit was about 0.1 at room temperature due to its low thermal conductivity. We assessed the interfacial thermal resistance between bismuth telluride and halide perovskite using multilayered films to understand the measured low thermal conductivity. The calculated thermal conductivity using the measured interfacial thermal resistance was fairly consistent with the effective thermal conductivity observed. We also discussed the interfacial thermal resistance using a phonon transport model based on ab-initio calculations to confirm the validity of our measurements. Additionally, we found that the high interfacial thermal resistance was achieved due to the low group velocities of both materials in the composites. This mechanism can be applied not only to improve thermoelectric materials but also to address thermal issues in composites.

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Lycium b arbarum 's diabetes secrets: A comprehensive review of cellular, molecular, and epigenetic targets with immune modulation and microbiome influence

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Journal of Pharmaceutical Analysis 2025年第5期15卷

作者： Zeshan Ali Aqsa Ayub Yawen Lin Sonam Anis Ishrat Khan Shoaib Younas Rana Adnan Tahir Shulin Wang Jianrong Li College of Food Science and Technology Bohai University National & Local Joint Engineering Research Center of Storage Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products Jinzhou Liaoning 121013 China Department of Biosciences COMSATS University Islamabad Sahiwal Campus Punjab 57000 Pakistan Yashfeen College of Pharmacy Yashfeen Education System Shahdra Lahore 54590 Pakistan School of Life Sciences and Biotechnology Shanghai Jiao Tong University Shanghai 200240 China School of Health Science and Engineering University of Shanghai for Science and Technology Shanghai 200093 China Department of Biology Sultan Qaboos University Muscat 123 Oman College of Agriculture and Animal Husbandry Qinghai University Xining Qinghai 810016 China

Diabetes, a metabolic disease stemming from impaired or defective insulin secretion, ranks among the most severe chronic illnesses globally. While several approved drugs exist for its treatment, they often come with multiple side effects. Therefore, there is a pressing need for safe and effective anti-diabetic medications. Traditional Chinese medicine has recognized Lycium barbarum (LB; goji berry) plant, commonly known as “wolfberry fruit” in China, for over 2,000 years. Natural compounds derived from LB show promise in reducing diabetes levels. Although research on the impact of LB on diabetes is still limited, our review aims to explore the potential of LB in reducing the risk of diabetes and examine the underlying mechanisms involved. LB can modulate diabetes through various pathways, such as inhibiting α-amylase and α-glucosidase activities, promoting β-cell proliferation, stimulating insulin secretion, inhibiting glucagon secretion, improving insulin resistance and glucose tolerance, and enhancing antioxidant and anti-inflammatory activities. Additionally, LB improves gut flora and immunomodulation, further aiding diabetes management. These findings highlight the potential clinical utility of LB in managing diabetes and its complications within the framework of evidence-based modern medicine.

关键词： Bioactive substances Glucose metabolism Gut flora Immunomodulation Traditional Chinese medicine Wolfberry fruit

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research on Centralized Optimization Clearing Method for Interregional Spot Market

Research on Centralized Optimization Clearing Method for Int...

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2022 Power system and Green Energy Conference, PSGEC 2022

作者： Han, Bin Hu, Chenxu Yuan, Xue Yu, Mingkai Wang, Jianxiao Zhang, Lu Chang, Naichao Mu, Yongzheng Beijing Key Laboratory of Research and System Evaluation of Power Dispatching Automation Technology China Electric Power Research Institute Beijing China School of Electrical and Electronic Engineering North China Electric Power University Beijing China College of Information and Electrical Engineering China Agricultural University Beijing China National Power Dispatch Control Center Beijing China

ISBN: (数字)9781665499934

ISBN: (纸本)9781665499934

The paper presents an in-depth analysis of the clearing process of the interregional renewable energy spot market currently in operation and the trading path construction method, and explains the issues that need to be considered for the future development of this market. On this basis, a centralized and efficient interregional spot market clearing model is proposed, which makes full use of the current trading path construction method, considering the same optimization objective of price difference matching method and security constraints of interregional and regional power grids. With high scalability, this model can meet the requirements of power grid safe operation and further improve the enforceability of market clearing results. It can provide theoretic support for the development of interregional spot market and the effective coordination between cross regional and regional spot market in the future. A case study of a 5-region system is adopted to verify the correctness and effectiveness of the proposed model. © 2022 IEEE.

关键词： Electric power transmission networks

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Resource management using dynamical load prediction and multiprocessor cooperation

Resource management using dynamical load prediction and mult...

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作者： Guo, Xiuyan Zhang, Wu Wang, Jinlin Wu, Gang Joint Lab. of Network Communication System and Control Department of Automation University of Science and Technology of China Hefei Anhui 230027 China National Network New Media Engineering Research Center Institute of Acoustics Chinese Academy of Sciences Beijing 100190 China

ISBN: (纸本)9788988678367

Resource management is a complicated problem in multiprocessor system. When tasks with real-time characteristic are scheduled on processor resource constraints such as CPU and memory have to be met, however, it is usually difficult for a system to ensure load balancing and resource constraints simultaneity. In order to handle this problem lots of algorithms have been brought forward. In this paper, a load balancing policy is proposed to manage and integrate processing resource of multiprocessor system which is used to send packets of packets flows on time. The policy dynamically predicts the wait time before a packet to be processed based on the load of the processor and the timestamp of the packet, and decides the migration of packet between processors to guarantee that the packets can be processed before deadline. This policy can not only increase the multiprocessor utilization but also enhance the capacity of the system against the jitter of load by packets migration between the processors as well. We use simulation experiment to show that the policy can reduce the possibility of packets delay and increase the concurrency of flows that the system can serve.1 © 2011 AICIT.

关键词： Resource allocation

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