检索结果-内蒙古大学图书馆

Slope Instability analysis of the Qiongdongnan Basin in the Northern Part of the South China Sea:Implications for the Risk Evaluation of Deepwater Drilling

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Journal of Ocean University of China 2023年第2期22卷 393-409页

作者： MA Linwei WU Shiguo LIU Yanrui SUN Jin OUYANG Min LI Qingping QIN Yongpeng WANG Dawei Laboratory of Marine Geophysics and Georesources Institute of Deep-Sea Science and EngineeringChinese Academy of SciencesSanya 572000China University of Chinese Academy of Sciences Beijing 100049China College of Geophysics Chengdu University of TechnologyChengdu 610059China CNOOC China Limited Zhanjiang BranchZhanjiang 524057China State Key Laboratory of Natural Gas Hydrate CNOOC Research Institute Company LimitedBeijing 100028China

The instability of continental slopes damages marine engineering equipment,such as submarine pipelines,resulting in the generation of tsunamis,which endangers the safety of nearshore ***,research on the instability of continental slopes where submarine landslides usually occur is crucial to the risk evaluation of deepwater *** studies were mainly based on simplified 2D and 3D models,which extend the 2D model applied on submarine slopes with complex *** this study,a numerical model with bathymetric data from the Qiongdongnan Basin was ***,3D slope stability analysis and static and dynamic analyses were *** static analysis found two discussions where slopes are most likely to *** the analysis of different seismic forces,the dynamic result showed that an instability area is added to the two positions where the static analysis is *** scatters and transmits seismic waves and controls the accumulation and diffusion of seismic energy.3D calculations and analysis revealed that the direction of slope instability is closely related to terrain inclination,slope,terrain effect,and terrain *** showed that instability situations could not be derived from a single direction or profile *** situations are an important factor in slope stability analysis and are critical to the prediction and evaluation of marine geological disasters.

关键词： South China Sea submarine landslide slope instability topography curvature topography slope granite

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Research Progress of Lithium Plating on Graphite Anode in Lithium-Ion Batteries

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Chinese Journal of Chemistry 2021年第1期39卷 165-173页

作者： Daozhong Hu Lai Chen Jun Tian Yuefeng Su Ning Li Gang Chen Yulu Hu Yueshan Dou Shi Chen Feng Wu Beiing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Department of Testing Technology China North Vehicle Research InstituteBeijing 100072China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China

Lithium plating on graphite anode is triggered by harsh conditions of fast charge and low temperature,which sig-nificantly accelerates SOH(state of health)degradation and may cause safety issues of lithium ion batteries(LIBs).This paper has reviewed recent research progress of lithium plating on graphite ***,we summarize the forming mechanisms of Li plating with(corresponding influence factors,the detect-ing methods and hazard of Li ***,approaches to suppress Li plating are discussed,including anode surface modification,electrolyte composition optimization and development of optimal ***,we con-clude and propose the remaining challenges and prospects in terms of mechanism research,detecting approaches,and suppressing methods of Li *** review highlights the development of Li plating research and plays a guiding rule of further study on Li plating in LIBs.

关键词： Lithium Plating Graphite anode Electron microscopy Low-temperature physics

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Dynamic nanomechanical characterization of cells in exosome therapy

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Microsystems & Nanoengineering 2024年第4期10卷 185-200页

作者： Ye Chen Zihan Zhang Ziwei Li Wenjie Wu Shihai Lan Tianhao Yan Kainan Mei Zihan Qiao Chen Wang Chuanbiao Bai Ziyan Li Shangquan Wu Jianye Wang Qingchuan Zhang CAS Key Laboratory of Mechanical Behavior and Design of Material Department of Modern MechanicsUniversity of Science and Technology of ChinaHefeiAnhui 230027China Reproductive Medicine Center Department of Obstetrics and GynecologyThe First Affiliated Hospital of Anhui Medical UniversityHefei 230022China Anhui Province Key Laboratory of Reproductive Health and Genetics Anhui Medical UniversityHefei 230022China Department of Cell Biology and Genetics College of Basic Medical SciencesJilin UniversityChangchun 130021China State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of Science15 Beisihuan West RoadBeijing 100190China

Exosomes derived from mesenchymal stem cells(MSCs)have been confirmed to enhance cell proliferation and improve tissue *** release their contents into the cytoplasmic solution of the recipient cell to mediate cell expression,which is the main pathway through which exosomes exert therapeutic *** corresponding process of exosome internalization mainly occurs in the early stage of ***,the therapeutic effect of exosomes in the early stage remains to be further *** report that the three-dimensional cell traction force can intuitively reflect the ability of exosomes to enhance the cytoskeleton and cell contractility of recipient cells,serving as an effective method to characterize the therapeutic effect of *** with traditional biochemical methods,we can visualize the early therapeutic effect of exosomes in real time without damage by quantifying the cell traction *** quantitative analysis of traction forces,we found that endometrial stromal cells exhibit short-term cell roundness accompanied by greater traction force during the early stage of exosome *** experiments revealed that exosomes enhance the traction force and cytoskeleton by regulating the Rac1/RhoA signaling pathway,thereby promoting cell *** work provides an effective method for rapidly quantifying the therapeutic effects of exosomes and studying the underlying mechanisms involved.

关键词： exosome traction thereby

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A Real-Time Adaptive SOGI Frequency Multiplying technology for OFDR 15

A Real-Time Adaptive SOGI Frequency Multiplying Technology f...

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15th International Conference on Information Optics and Photonics, CIOP 2024

作者： Shuai, Luwei Ye, Lei Ye, Qing Key Laboratory of Space Laser Communication and Detection Technology Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai201800 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China

ISBN: (数字)9781510686175

ISBN: (纸本)9781510686168

A real-time adaptive second-order generalized integrator spreading technique suitable for OFDR is proposed to address the drawbacks of low spatial data utilization and complex phase extraction in the equal optical frequency sampling method. By using the discretized SOGI algorithm, the main components and orthogonal components of the original signal are obtained, and the signal phase is obtained through trigonometric calculation to achieve frequency multiplying. Using the phase signal after frequency multiplying for equal optical frequency sampling can improve the distance utilization of the auxiliary interferometer and be implemented on FPGA. Finally, it has been experimentally proven that this technology can break through the original detection distance without changing the optical path and achieving real-time performance of 4 frames per second. Realize a testing range of 300m with an auxiliary interferometer arm length difference of 150m and spatial resolution of 80μm. © 2024 SPIE.

关键词： Interferometers

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The 2023 report of the synergetic roadmap on carbon neutrality and clean air for China: Carbon reduction, pollution mitigation, greening, and growth

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Environmental science and Ecotechnology 2025年第1期23卷 1-18页

作者： Jicheng Gong Zhicong Yin Yu Lei Xi Lu Qiang Zhang Cilan Cai Qimin Chai Huopo Chen Renjie Chen Wenhui Chen Jing Cheng Xiyuan Chi Hancheng Dai Zhanfeng Dong Guannan Geng Jianlin Hu Shan Hu Cunrui Huang Tiantian Li Wei Li Xiaomei Li Yongsheng Lin Jun Liu Jinghui Ma Yue Qin Weiqi Tang Dan Tong Jiaxing Wang Lijuan Wang Qian Wang Xuhui Wang Xuying Wang Libo Wu Rui Wu Qingyang Xiao Yang Xie Xiaolong Xu Tao Xue Haipeng Yu Da Zhang Li Zhang Ning Zhang Shaohui Zhang Shaojun Zhang Xian Zhang Zengkai Zhang Hongyan Zhao Bo Zheng Yixuan Zheng Tong Zhu Huijun Wang Jinnan Wang Kebin He State Key Joint Laboratory for Environment Simulation and Pollution Control College of Environmental Sciences and Engineering and Center for Environment and HealthPeking UniversityBeijing100871China 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 Center of Air Quality Simulation and System Analysis Chinese Academy of Environmental PlanningBeijing100041China Center for Carbon Neutrality Chinese Academy of Environmental PlanningBeijing100041China 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 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 CaliforniaIrvineIrvineCA92697USA National Meteorological Center China Meteorological AdministrationBeijing100081China College of Environmental Sciences and Engineering Peking UniversityBeijing100871China Institute of Eco-Environmental Management and Policy Chinese Academy of Environmental PlanningBeijing100041China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Contr

The response to climate change and air pollution control demonstrates strong synergy across scientific mechanisms,targets,strategies,and governance *** report,based on a monitoring indicator system for coordinated governance of air pollution and climate change,employs an interdisciplinary approach combining natural and social *** establishes 20 indicators across five key areas:air pollution and climate change,governance systems and practices,structural transformation and technologies,atmospheric components and emission reduction pathways,and health impacts and *** report tries to provide actionable insights into the interconnectedness of air pollution and climate *** highlights key policy gaps,presents updated indicators,and offers a refined monitoring framework to track progress toward China's dual goals of reducing emissions and improving air *** to previous editions,this year's report has updated four key indicators:meteorological impacts on air quality,climate change and its effects,governance policies,and low-carbon building energy *** aim is to further refine the monitoring framework,track progress,and establish a comprehensive theory for collaborative governance while identifying challenges and proposing solutions for China's pathway to carbon neutrality and clean *** report comprises six *** executive summary chapter is followed by analyzing air pollution and climate change *** systems and practices are discussed in the third chapter,focusing on policy implementation and local *** fourth chapter addresses structural transformations and emission reduction technologies,including energy and industrial shifts,transportation,low-carbon buildings,carbon capture and storage,and power *** fifth chapter outlines atmospheric component dynamics and emission pathways,presenting insights into emission drivers and future *** sixth chapter assesses he

关键词： Synergetic roadmap Carbon neutrality Clean air

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Real-time analysis of star sensor attitude accuracy 3

Real-time analysis of star sensor attitude accuracy

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2023 3rd International Conference on Measurement Control and Instrumentation, MCAI 2023

作者： Fu, Jingneng Luo, Wen Zhang, Hui Institute of Optics and Electronics Chinese Academy of Sciences Chengdu610209 China Key Laboratory of Science and Technology on Space Optoelectronic Precision Measurement Chinese Academy of Sciences Chengdu610209 China University of Chinese Academy of Sciences Beijing100049 China Youth Innovation Promotion Association Chinese Academy of Sciences Beijing100029 China

In the conventional methods of star sensor accuracy evaluation, neither the accuracy calculation formula nor the Monte Carlo method can comprehensively reflect the attitude measurement accuracy of star sensors in real-time. In this paper, a real-time analysis and calculation model for the attitude measurement accuracy of star sensors is proposed. Firstly, the basic attitude measurement model of the star sensor is established through the pinhole imaging model. Moreover, a moving frame of star sensor attitude measurement is established to avoid the defects of attitude representation by the Euler angle in the star sensor accuracy analysis. Then, combined with the error transfer of implicit overdetermined equations proposed in this paper, the error transfers of starspot extraction random error, star catalog random error, and intrinsic parameter system error are provided. Finally, simulation and field experiments are conducted to verify the accuracy of the proposed error analysis theory. The experimental results show that the attitude measurement accuracy of star sensors can be accurately estimated by using single-frame data of guide stars. © Published under licence by IOP Publishing Ltd.

关键词： Errors

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Plasma Extracellular Vesicle MicroRNA analysis of Alzheimer’s Disease Reveals Dysfunction of a Neural Correlation Network

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Research 2023年第4期2023卷 689-699页

作者： Yuzhe Sun Zhen Hefu Benchao Li Wang Lifang Song Zhijie Li Zhou Yan Deng Liu Zhili Jiahong Ding Tao Li Wenwei Zhang Nie Chao Shuang Rong Department of Nutrition and Food Hygiene School of Public HealthMedical CollegeWuhan University of Science and TechnologyWuhanChina BGI-Shenzhen ShenzhenChina Shenzhen Key Laboratory of Neurogenomics BGI-ShenzhenShenzhen 518120China College of Life Sciences University of Chinese Academy of SciencesBeijing 100049China.

Small extracellular vesicle(sEV)is an emerging source of potential biomarkers of Alzheimer's disease(AD),but the role of microRNAs(miRNAs)in sEV is not well *** this study,we conducted a comprehensive analysis of sEV-derived miRNAs in AD using small RNA sequencing and coexpression network *** examined a total of 158 samples,including 48 from AD patients,48 from patients with mild cognitive impairment(MCI),and 62 from healthy *** identified an miRNA network module(M1)that was strongly linked to neural function and showed the strongest association with AD diagnosis and cognitive *** expression of miRNAs in the module was decreased in both AD and MCI patients compared to *** analysis revealed that M1 was highly preserved in the healthy control group but dysfunctional in the AD and MCI groups,suggesting that changes in the expression of miRNAs in this module may be an early response to cognitive decline prior to the appearance of AD *** further validated the expression levels of the hub miRNAs in M1 in an independent *** functional enrichment analysis showed that 4 hub miRNAs might interact with a GDF11-centered network and play a critical role in the neuropathology of *** summary,our study provides new insights into the role of sEV-derived miRNAs in AD and suggests that M1 miRNAs may serve as potential biomarkers for the early diagnosis and monitoring of AD.

关键词： network analysis. diagnosis

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A 100Gbps Monolithic Integrated Analog Coherent QPSK Optical Receiver Based on a COSTAS Optical Phase-Locked Loop

A 100Gbps Monolithic Integrated Analog Coherent QPSK Optical...

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2023 Asia Communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings, ACP/POEM 2023

作者： Yang, Yihao Xiong, Yongliang Ren, Yangming Ma, Qianli Xue, Jintao Yu, Zhiyuan Qi, Nan Wang, Binhao Xi'an Institute of Optics and Precision Mechanics Chinese Academy of Science State Key Laboratory of Transient Optics and Photonics Xi'an710119 China School of Future Technology University of Chinese Academy of Sciences Beijing100049 China Institute of Semiconductors Chinese Academy of Science State Key Laboratory of Superlattices and Microstructures Beijing100083 China University of Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering Beijing100049 China

ISBN: (纸本)9798350312614

This paper presents a 100Gbps Quadrature Phase Shift keying (QPSK) analog coherent optical receiver. The study emphasizes the utilization of optoelectronic monolithic integration technology to realize the proposed optical receiver, which is based on the COSTAS optical phase-locked loop (OPLL) technique. The analysis thoroughly examines the impact of loop filter bandwidth and loop delay on the system's phase locking accuracy. Moreover, it demonstrates an effective solution to address phase locking challenges arising from increased loop delay. When using a laser with a linewidth of 10MHz for the local oscillator, the optical receiver successfully achieves phase locking with a phase error of less than 0.8°. © 2023 IEEE.

关键词： analog coherent COSTAS loop Monolithic integration optical phase lock loop QPSK

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Competitive Auctions with Imperfect Predictions 24

Competitive Auctions with Imperfect Predictions

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25th Conference on Economics and Computation, EC 2024

作者： Lu, Pinyan Wan, Zongqi Zhang, Jialin Shanghai University of Finance and Economics Shanghai China SKLP Institute of Computing Technology Chinese Academy of Sciences Beijing China Key Laboratory of Interdisciplinary Research of Computation and Economics Shanghai University of Finance and Economics Ministry of Education China School of Computer Science and Technology University of Chinese Academy of Sciences China

ISBN: (纸本)9798400707049

The competitive auction was first proposed by Goldberg, Hartline, and Wright. In their paper [Goldberg et al., 2001], they introduce the competitive analysis framework of online algorithm design into the traditional revenue-maximizing auction design problem. While the competitive analysis framework only cares about the worst-case bound, a growing body of work in the online algorithm community studies the learning-augmented framework. In this framework, designers are allowed to leverage imperfect machine-learned predictions of unknown information and pursue better theoretical guarantees when the prediction is accurate(consistency). Meanwhile, designers also need to maintain a nearly-optimal worst-case ratio(robustness). In this work, we revisit the competitive auctions in the learning-augmented setting. We leverage the imperfect predictions of the private value of the bidders and design the learning-augmented mechanisms for several competitive auctions with different constraints, including: digital good auctions, limited-supply auctions, and general downward-closed permutation environments. We also design the learning-augmented mechanism for online auctions. For all these auction environments, our mechanisms enjoy 1-consistency against the strongest benchmark OPT. In contrast, it is impossible to achieve O(1)-competitiveness against OPT without predictions. At the same time, our mechanisms also maintain the O(1)-robustness against all benchmarks considered in the traditional competitive analysis, including F (2), maxV, and EFO(2). Considering the possible inaccuracy of the predictions, we provide a reduction that transforms our learning-augmented mechanisms into an error-tolerant version, which enables the learning-augmented mechanism to ensure satisfactory revenue in scenarios where the prediction error is moderate. We also prove a 3 robustness ratio lower bound for mechanisms with perfect consistency. The lower bound is strictly greater than the optimal 2.42 compet

关键词： Contrastive Learning

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User-Level Large Scale Load Forecasting Based on GPU 9

User-Level Large Scale Load Forecasting Based on GPU

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9th Annual International Conference on Network and Information Systems for Computers, ICNISC 2023

作者： Qi, Jinshan Wang, Jiangtao Liang, Xun Xu, Zhiming Huaiyin Normal University Huai'an Key Laboratory of Big Data Intelligent Computing and Analysis School of Computer Science and Technology Huai'an China Renmin University of China School of Information Beijing China

ISBN: (纸本)9798350306682

Load forecasting is an essential part in power system management and planning. In recent years, more and more researchers started to focus on the behavior of terminal customers, trying to improve the accuracy of load forecasting. This paper proposes to use the neuron network model to predict each user's load first, and then aggregate all the forecasting results to get higher-level prediction. In order to speed up the process, we also design a model based on CUDA. We conducted several experiments on real-world data (160 thousand consumers' load profiles) and the results confirm the effectiveness and efficiency of our method. © 2023 IEEE.

关键词： Graphics processing unit

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