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The Impact of Floods on the Mobility of Automobile Commuters in Shanghai Under Climate Change

International Journal of Disaster Risk Science 2024年第6期15卷 986-1000页

作者： qian Yao Xinmeng Shan Mengya li jun Wang Key laboratory of Geographic Information Science of Ministry of Education East China Normal University Institute for National Safety and Emergency Management East China Normal University School of Geographic Sciences East China Normal University Key laboratory of Mountain Hazards and Earth Surface Process Institute of Mountain Hazards and Environment Chinese Academy of Sciences China-Pakistan Joint Research Center on Earth Sciences CAS-HEC School of Public Management East China Normal University

As sea level rises, low-lying coastal cites face increasing threat of flood disruption, particularly in terms of human mobility. Commuters are vulnerable to bad weather, as it is difficult to cancel trips even in extreme weather conditions. Using Shanghai's automobile commuting population as an example, we categorized commuters by travel distance and income level to assess disruptions and delays due to floods, considering future sea level rise. The results show that local flooding disrupts commuting patterns by affecting roadways, with disruption decreasing with distance from the flooded area. This offers a mobility perspective on the indirect impacts of floods. During baseline flood events, long-distance commuters and the lowincome group are most affected, while short-distance commuters and the high-income group are less impacted. As sea level rises, floods will threaten all commuting groups, especially the high-income group. Using inaccessibility-commuting delay bivariate maps, this study revealed how socioeconomic differences impact mobility recovery after floods under climate change. The research highlights the differential impacts of floods on various socioeconomic groups in the context of climate change, offering insights for future urban planning and disaster mitigation strategies.

关键词： Climate change Commuting patterns Human mobility Indirect flood effect Shanghai Socioeconomic disparities

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Word-Representation-Based Method for Extracting Organizational Events from Online Media

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Journal of Electronic Science and Technology 2017年第4期15卷 407-412页

作者： jun-qiang Zhang Xiong-Wen Deng Yu qian School of Management and Economics University of Electronic Science and Technology of China Chengdu 611731 China

Online social media exhibit massive organizational event relevant messages, and the well categorized event information can be useful in many real-world applications. In this paper, we propose a research framework to extract high quality event information from massive online media data. The main contributions lie in two aspects: First, we present an event-extraction and event-categorization system for online media data; second, we present a novel approach for both discovering important event categories and classifying extracted events based on word representation and clustering model. Experimental results with real dataset show that the proposed framework is effective to extract high quality event information.

关键词： Event detection social media text mining word representation

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For robust big data analyses:a collection of 150 important pro-metastatic genes

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Chinese Journal of Cancer 2017年第3期36卷 112-120页

作者： Yan Mei jun-Ping Yang Chao-Nan qian State Key laboratory of Oncology in South China Collaborative Innovation Center for Cancer MedicineSun Yat-sen University Cancer CenterGuangzhou 510060GuangdongP.R.China Department of Nasopharyngeal Carcinoma Sun Yat-sen University Cancer CenterGuangzhou 510060GuangdongP.R.China

Metastasis is the greatest contributor to cancer?related *** the era of precision medicine,it is essential to predict and to prevent the spread of cancer cells to significantly improve patient *** to the application of a variety of high?throughput technologies,accumulating big data enables researchers and clinicians to identify aggressive tumors as well as patients with a high risk of cancer ***,there have been few large?scale gene collection studies to enable metastasis?related *** the last several years,emerging efforts have identi?fied pro?metastatic genes in a variety of cancers,providing us the ability to generate a pro?metastatic gene cluster for big data *** carefully selected 285 genes with in vivo evidence of promoting metastasis reported in the *** genes have been investigated in different tumor *** used two datasets downloaded from The Cancer Genome Atlas database,specifically,datasets of clear cell renal cell carcinoma and hepatocellular carcinoma,for validation tests,and excluded any genes for which elevated expression level correlated with longer overall survival in any of the ***,150 pro?metastatic genes remained in our *** believe this collection of pro?metastatic genes will be helpful for big data analyses,and eventually will accelerate anti?metastasis research and clinical intervention.

关键词： Pro-metastatic gene Big data analysis Renal cancer liver cancer

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Effect of chromium content on microstructure and corrosion behavior of W-Cr-C coatings prepared on tungsten substrate

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Frontiers of Materials Science 2015年第1期9卷 77-84页

作者： Yan JIANG jun-Feng YANG qian-Feng FANG Key laboratory of Materials Physics Institute of Solid State Physics Chinese Academy of Sciences Hefei 230031 China

W-Cr-C coatings with different chromium contents （0-3wt.%） were fabricated on the tungsten substrates by spark plasma sintering （SPS） method from the graphite and chromium mixed powders. SEM and XRD were exploited to analyze the effect of Cr contents on the microstructure of coatings. It was found that the abnormal hollow WC grains disappeared with addition of Cr less than 2%, and the microstructures were largely refined and densified. With further increase of Cr addition, the grains changed slightly but the densificaUon was reduced. The most dense coating was achieved at I wt.% Cr. Corrosion behavior of the W-Cr-C coatings were investigated by impedance spectrum and potentiodynamic polarization tests. Results suggested that the W-1Cr-C coated W sample exhibited the lowest corrosion current density and highest corrosion potential due to the most densified microstructure, indicating that the addition of Cr at 1 wt.% was optimal for WC coating against corrosion.

关键词： W-Cr-C coating spark plasma sintering (SPS) corrosion resistance electrochemical measurement

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Volcanism in the Solar System

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Science China Earth Sciences 2023年第11期66卷 2419-2440页

作者： long XIAO jun HUANG Zhiyong XIAO Chao QI Yuqi qian School of Earth Sciences China University of GeosciencesWuhan 430074China School of Atmospheric Sciences Sun Yat-sen UniversityZhuhai 519082China Key laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

Volcanic activity is the main process for heat-material exchange and circulation for differentiated planets. All terrestrial planets in the Solar System, the Moon, the satellites of giant planets, and the dwarf planets once experienced or are currently experiencing volcanic activities. This paper summarized the volcanism(main volcanic features and their formation) on the Moon, Mars, Venus, and Mercury in the inner Solar System, volcanism and cryovolcanism on satellites(Io, Europa,Enceladus) of giant planets, as well as volcanism on dwarf planets including Cere in the main asteroid belt and Pluto in the Kuiper belt. This work shows volcanism in the Solar System is driven by various factors, forming abundant volcanic *** has significant meanings to compare volcanism happening on different planets using comparative planetology approaches for a better understanding of volcanism, the planetary habitability, and the information contained on the origin and evolution of planets in the Solar System.

关键词： Volcanism Terrestrial planets Planetary evolution Solar System

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Two-dimensional analysis of progressive delamination in thin film electrodes

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Acta Mechanica Sinica 2018年第2期34卷 359-370页

作者： Mei liu Bo lu Dong-li Shi jun-qian Zhang Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Department of Mechanics Shanghai University Shanghai Key laboratory of Mechanics in Energy Engineering Shanghai University Materials Genome Institute Shanghai University

By employing the two-dimensional analysis, i.e.,plane strain and plane stress, a semi-analytical method is developed to investigate the interfacial delamination in electrodes. The key parameters are obtained from the governing equations, and their effects on the evolution of the delamination are evaluated. The impact of constraint perpendicular to the plane is also investigated by comparing the plane strain and plane stress. It is found that the delamination in the plane strain condition occurs easier, indicating that the constraint is harmful to maintain the structure stability. According to the obtained governing equations, a formula of the dimensionless critical size for delamination is provided, which is a function of the maximum volumetric strain and the Poisson’s ratio of the active layer.

关键词： lithium-ion battery Thin film electrode Delamination Critical size

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4D Printing:History and Recent Progress

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Chinese Journal of Polymer Science 2018年第5期36卷 563-575页

作者： Jing-jun Wu li-Mei Huang qian Zhao Tao Xie State Key laboratory of Chemical Engineering College of Chemical and Biological Engineering Zhejiang University

4D printing has attracted great interest since the concept was introduced in 2012. The past 5 years have witnessed rapid advances in both 4D printing processes and materials. Unlike 3D printing, 4D printing allows the printed part to change its shape and function with time in response to change in external conditions such as temperature, light, electricity, and water. In this review, we first overview the history of 4D printing and discuss its definition. We then summarize recent technological advances in 4D printing with focuses on methods, materials, and their intrinsic links. Finally, we discuss potential applications and offer perspectives for this exciting new field.

关键词： 4D printing Shape memory polymer Hydrogel Multi-material structure Single-material structure

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Oscillating field stimulation promotes neurogenesis of neural stem cells through miR-124/Tal1 axis to repair spinal cord injury in rats

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Neural Regeneration Research 2023年第4期18卷 895-900页

作者： Chao Fang Jian Sun jun qian Cai-liang Shen Department of Orthopedics&Spine Surgery The First Affiliated Hospital of Anhui Medical UniversityHefeiAnhui ProvinceChina Department of Orthopedics The Second Affiliated Hospital of Anhui Medical UniversityHefeiAnhui ProvinceChina

Spinal cord injury often leads to severe motor and sensory deficits,and prognosis using the currently available therapies remains ***,we aimed to explore a novel therapeutic approach for improving the prognosis of spinal cord *** this study,we implanted oscillating field stimulation devices and transplanted neural stem cells into the thoracic region(T9–T10)of rats with a spinal cord ***-Beattie-Bresnahan scoring revealed that oscillating field stimulation combined with neural stem cells transplantation promoted motor function recovery following spinal cord *** addition,we investigated the regulation of oscillating field stimulation on the miR-124/Tal1 axis in neural stem *** of lentivirus was performed to investigate the role of Tal1 in neurogenesis of neural stem cells induced by oscillating field *** reverse transcription-polymerase chain reaction,immunofluorescence and western blotting showed that oscillating field stimulation promoted neurogenesis of neural stem cells in vitro and in *** and eosin staining showed that oscillating field stimulation combined with neural stem cells transplantation alleviated cavities formation after spinal cord *** the results together,we concluded that oscillating field stimulation decreased miR-124 expression and increased Tal1 content,thereby promoting the neurogenesis of neural stem *** combination of oscillating field stimulation and neural stem cells transplantation improved neurogenesis,and thereby promoted structural and functional recovery after spinal cord injury.

关键词： miR-124 neural stem cell neurogenesis oscillating field stimulation recovery spinal cord injury Tal1 tissue repair transplantation

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A closed-loop particle swarm optimizer for multivariable process controller design

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第8期9卷 1050-1060页

作者： Kai HAN jun ZHAO Zu-hua XU Ji-xin qian State Key lab of Industrial Control Technology Institute of Industrial Process Control Zhejiang University Hangzhou 310027 China

Design of general multivariable process controllers is an attractive and practical alternative to optimizing design by evolutionary algorithms (EAs) since it can be formulated as an optimization problem. A closed-loop particle swarm optimization (ClPSO) algorithm is proposed by mapping PSO elements into the closed-loop system based on control theories. At each time step, a proportional integral (PI) controller is used to calculate an updated inertia weight for each particle in swarms from its last fitness. With this modification, limitations caused by a uniform inertia weight for the whole population are avoided, and the particles have enough diversity. After the effectiveness, efficiency and robustness are tested by benchmark functions, ClPSO is applied to design a multivariable proportional-integral-derivative (PID) controller for a solvent dehydration tower in a chemical plant and has improved its performances.

关键词： Multivariable process control Proportional-integral-derivative (PID) control Model predictive control (MPC) Particle swarm optimization (PSO) Closed-loop system

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Optimal Design of Multiple Stress Constant Accelerated life Test Plan on Non-rectangle Test Region

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Chinese Journal of Mechanical Engineering 2012年第6期25卷 1231-1237页

作者： CHEN Wenhua GAO liang lIU Juan qian Ping PAN jun Department of Mechanical Engineering Zhejiang University Hangzhou 310027 China Zhejiang Province's Key laboratory for Reliability Technology of Mechanical & Electrical Products Zhejiang Sci-Tech University Hangzhou 310018 China

For optimal design of constant stress accelerated life test（CSAlT） with two-stress, if the stresses could not reach the highest levels simultaneously, the test region becomes non-rectangular. For optimal CSAlT design on non-rectangle test region, the present method is only focused on non-rectangle test region with simple boundary, and the optimization algorithm is based on experience which can not ensure to obtain the optimal plan. In this paper, considering the linear-extreme value model and the optimization goal to minimize the variance of lifetime estimate under normal stress, the optimal design method of two-stress type-I censored CSAlT plan on general non-rectangular test region is proposed. First, two properties of optimal test plans are proved and the relationship of all the optimal test plans is determined analytically. Then, on the basis of the two properties, the optimal problem is simplified and the optimal design method of two-stress CSAlT plan on general non-rectangular test region is proposed. Finally, a numerical example is used to illustrate the feasibility and effectiveness of the method, The result shows that the proposed method could obtain the optimal test plan on non-rectangular test regions with arbitrary boundaries. This research provides the theory and method for two-stress optimal CSAlT planning on non-rectangular test regions.

关键词： accelerated life test non- rectangular test region test plan optimal design

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