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Spatiotemporal variation of mortality burden attributable to heatwaves in China,1979–2020

Science Bulletin 2022年第13期67卷 1340-1344,M0004页

作者： Huiqi Chen Liang Zhao Wei Dong Liangliang Cheng Wenjia Cai Jun Yang Junzhe Bao Xin-Zhong Liang Shakoor Hajat Peng Gong Wannian Liang Cunrui Huang School of Public Health Sun Yat-sen UniversityGuangzhou 510080China Shanghai Key Laboratory of Meteorology and Health Shanghai Meteorological ServiceShanghai 200030China The State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China Key Laboratory of Meteorological Disaster Ministry of Education&Joint International Research Laboratory of Climate and Environment Change&Collaborative Innovation Center on Forecast and Evaluation of Meteorological DisastersNanjing University of Information Science and TechnologyNanjing 210044China Department of Earth System Science Tsinghua UniversityBeijing 100084China Institute for Environmental and Climate Research Jinan UniversityGuangzhou 510632China School of Public Health Zhengzhou UniversityZhengzhou 450001China Earth System Science Interdisciplinary Center&Department of Atmospheric and Oceanic Science University of MarylandCollege Park MD 20742USA Department of Epidemiology and Population Health London School of Hygiene and Tropical MedicineLondon WC1E 7HTUK Department of Earth Sciences the University of Hong KongHong Kong 999077China Vanke School of Public Health Tsinghua UniversityBeijing 100084China Institute of Healthy China Tsinghua UniversityBeijing 100084China

热浪通过增加死亡和发病风险导致巨大的公共卫生负担.而在气候变暖与社会经济发展相交织的风险下,中国人群所面临的热浪导致的健康负担的时间演变规律、空间分布特征及其驱动因素仍然存在大量空白.本研究应用基于事件的归因损失评估方... 详细信息

热浪通过增加死亡和发病风险导致巨大的公共卫生负担.而在气候变暖与社会经济发展相交织的风险下,中国人群所面临的热浪导致的健康负担的时间演变规律、空间分布特征及其驱动因素仍然存在大量空白.本研究应用基于事件的归因损失评估方法定量评估了过去40年格点水平的每日热浪归因死亡人数.研究发现,热浪相关死亡人数具有快速增长、非线性和极端性的特征,40年间增加了4倍,2010年代年均归因死亡人数达15500人.归因死亡负担还呈现强烈的区域异质性,华东和华中地区负担更重.随着时间的推移,中国可归因死亡人数上升的主要影响因素是增加的热浪发生频率,其次是人口增长和老龄化.这项工作为民众提供了更为直观的高温健康危害信息,同时为制定有针对性的气候变化适应措施提供重要信息.

关键词：社会经济发展气候变化适应区域异质性死亡人数损失评估公共卫生极端性发病风险

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PUGAN: Physical Model-Guided Underwater Image Enhancement Using GAN with Dual-Discriminators

arXiv

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arXiv 2023年

作者： Cong, Runmin Yang, Wenyu Zhang, Wei Li, Chongyi Guo, Chun-Le Huang, Qingming Kwong, Sam Institute of Information Science Beijing Jiaotong University Beijing100044 China School of Control Science and Engineering Shandong University Jinan250061 China Key Laboratory of Machine Intelligence and System Control Ministry of Education Jinan250061 China Beijing Key Laboratory of Advanced Information Science and Network Technology Beijing100044 China College of Computer Science Nankai University Tianjin300350 China School of Computer Science and Technology University of Chinese Academy of Sciences Beijing101408 China Key Laboratory of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences Beijing100190 China Peng Cheng Laboratory Shenzhen518055 China Department of Computer Science City University of Hong Kong Hong Kong City University of Hong Kong Shenzhen Research Institute Shenzhen51800 China

Due to the light absorption and scattering induced by the water medium, underwater images usually suffer from some degradation problems, such as low contrast, color distortion, and blurring details, which aggravate the difficulty of downstream underwater understanding tasks. Therefore, how to obtain clear and visually pleasant images has become a common concern of people, and the task of underwater image enhancement (UIE) has also emerged as the times require. Among existing UIE methods, Generative Adversarial Networks (GANs) based methods perform well in visual aesthetics, while the physical model-based methods have better scene adaptability. Inheriting the advantages of the above two types of models, we propose a physical model-guided GAN model for UIE in this paper, referred to as PUGAN. The entire network is under the GAN architecture. On the one hand, we design a Parameters Estimation subnetwork (Par-subnet) to learn the parameters for physical model inversion, and use the generated color enhancement image as auxiliary information for the Two-Stream Interaction Enhancement subnetwork (TSIE-subnet). Meanwhile, we design a Degradation Quantization (DQ) module in TSIE-subnet to quantize scene degradation, thereby achieving reinforcing enhancement of key regions. On the other hand, we design the Dual-Discriminators for the style-content adversarial constraint, promoting the authenticity and visual aesthetics of the results. Extensive experiments on three benchmark datasets demonstrate that our PUGAN outperforms state-of-the-art methods in both qualitative and quantitative metrics. The code and results can be found from the link of https://***/proj_***. © 2023, CC BY-NC-SA.

关键词： Discriminators

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Dead-Time Compensation and Single-Loop Control Strategy for Ground Power Unit

SSRN

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SSRN 2023年

作者： Xu, Wei Yang, Tao Miao, Yiru Chongqing Sub-bureau of Southwest China Regional Air Traffic Management Bureau CAAC Chongqing401120 China School of Rail Transit and Aviation Service Chongqing Industry Polytechnic College Chongqing401120 China State Key Laboratory of Power Transmission Equipment & System Security and New Technology Chongqing University Chongqing400044 China Chongqing University China

Instead of the auxiliary power system, the ground power unit supplies to airplanes during stopovers in airports, which is an important means of reducing carbon emissions of airport. However, under the restraint of switching frequency and high dynamic response speed, a single control loop is usually implemented in 400 Hz voltage-source inverter, the sampling and control of the inductor current in the LC filter are avoided, result in the design of the control system being more difficult, and the direction of the dead-time compensation can not be obtained due to the lack of the current polarity. In view of the above problem, this paper firstly analyzes the in-fluence on the output voltage of inverter due to the dead-time, including the errors of fundamental amplitude and phase, and the low-order harmonic distortion. Then, according to the state equation of the inductor current, a current observation model without zero drift is proposed to obtain the polarity of the inductor current. On this basis, feedforward compensation is carried out for the voltage error generated by the dead-time. Combined with the amplitude-frequency characteristic curve, the parameter optimization design method of the single closed-loop proportional-resonant controller is presented. Finally, a simulation model and an experimental platform are established to verify the feasibility and effectiveness of the current observation model, dead-time compensation method and controller parameter optimization design method proposed in this paper. © 2023, The Authors. All rights reserved.

关键词： Controllers

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中国亚热带植被蒸腾驱动力解耦分析

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Journal of Geographical Sciences 2023年第11期33卷 2159-2174页

作者：金佳鑫蔡裕龙郭熙王龙浩王颖刘元波 College of Hydrology and Water Resources Hohai UniversityNanjing 210024China Key Laboratory of Water Big Data Technology of Ministry of Water Resources Hohai UniversityNanjing 210024China College of Land Resources and Environment Jiangxi Agricultural UniversityNanchang 330045China Institute of Geographic Sciences and Natural Resources Research CASBeijing 100101China School of Tourism and Social Management Nanjing Xiaozhuang UniversityNanjing 211171China Nanjing Institute of Geography and Limnology CASNanjing 210008China National Earth System Science Data Center National Science and Technology Resource Sharing Service PlatformBeijing 100101China

Transpiration(Tc) is a critical component of the global water *** moisture(SM) and vapor pressure deficit(VPD) are key regulators of Tc,and exploring their contributions to changes in Tc can deepen our understanding of the mechanisms of water cycling in terrestrial ***,the driving roles of VPD and SM in Tc changes remain debated because of the coupling of SM and VPD through land-atmosphere interactions which restrict the quantification of the independent effects of SM and VPD on *** decoupling the correlations between SM and VPD using a novel binning approach,this study analyzed the dominant drivers of vegetation transpiration in subtropical China from 2003 to 2018 based on multi-source data,including meteorological reanalysis,remotely sensed soil moisture,transpiration,and land cover *** results show that Tc first increased and then remained stable with an increase in SM across the study area but changed slightly with increasing ***,the relative contribution of SM to the change in Tc was approximately five times that of *** sensitivities of Tc to SM and VPD differed among vegetation *** the sensitivity of Tc to SM was greater than that of VPD for all four vegetation types,the thresholds of Tc in response to SM were different,with the lowest threshold(approximately 35%) for the other forests and the highest threshold(approximately 55%) for short wood *** infer that this is associated with the differences in ecological *** verify the reliability of our conclusions,we used solar-induced chlorophyll fluorescence(SIF) data as a proxy for Tc based on the tight coupling between photosynthesis and *** results were obtained by repeating the *** results of this study,in which the impacts of SM and VPD on Tc were decoupled,are beneficial for further understanding the critical processes involved in water cycling in terrestrial ecosystems in response to climate change.

关键词： transpiration soil moisture vapor pressure deficit decoupling SIF

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Multi-objective Optimization of Space-Air-Ground Integrated Network Slicing Relying on a Pair of Central and Distributed Learning Algorithms

arXiv

引用

arXiv 2023年

作者： Zhou, Guorong Zhao, Liqiang Zheng, Gan Song, Shenghui Zhang, Jiankang Hanzo, Lajos Key Laboratory of Integrated Service Networks Xidian University Xi’an710071 China Key Laboratory of Integrated Service Networks Xidian University Xi’an710071 China School of Engineering University of Warwick CoventryCV4 7AL United Kingdom Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Hong Kong Department of Computing & Informatics Bournemouth University BH12 5BB United Kingdom School of Electronics and Computer Science University of Southampton SouthamptonSO17 1BJ United Kingdom

As an attractive enabling technology for next-generation wireless communications, network slicing supports diverse customized services in the global space-air-ground integrated network (SAGIN) with diverse resource constraints. In this paper, we dynamically consider three typical classes of radio access network (RAN) slices, namely high-throughput slices, low-delay slices and wide-coverage slices, under the same underlying physical SAGIN. The throughput, the service delay and the coverage area of these three classes of RAN slices are jointly optimized in a non-scalar form by considering the distinct channel features and service advantages of the terrestrial, aerial and satellite components of SAGINs. A joint central and distributed multi-agent deep deterministic policy gradient (CDMADDPG) algorithm is proposed for solving the above problem to obtain the Pareto optimal solutions. The algorithm first determines the optimal virtual unmanned aerial vehicle (vUAV) positions and the inter-slice sub-channel and power sharing by relying on a centralized unit. Then it optimizes the intra-slice sub-channel and power allocation, and the virtual base station (vBS)/vUAV/virtual low earth orbit (vLEO) satellite deployment in support of three © 2023, CC BY-NC-ND.

关键词： Multiobjective optimization

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Quantum machine learning of eco-environmental surfaces

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科学通报（英文版） 2022年第10期67卷 1031-1033页

作者： Tianxiang Yue Yi Liu Zhengping Du John Wilson Dongyi Zhao Yu Wang Na Zhao Wenjiao Shi Zemeng Fan Xiaomin Zhao Qin Zhang Hongsheng Huang Qingyuan Wu Wei Zhou Yimeng Jiao Zhe Xu Saibo Li Yang Yang Bojie Fu State Key Laboratory of Resources and Environment Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100190China College of Land Resources and Environment Jiangxi Agricultural UniversityNanchang 330045China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023China State Key Laboratory of Resources and Environment Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100190China State Key Laboratory of Resources and Environment Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China State Key Laboratory of Resources and Environment Information System Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environment University of Chinese Academy of SciencesBeijing 100190China Spatial Sciences Institute University of Southern CaliforniaLos AngelesCA 90089-0374USA Origin Quantum Computing Technology Company Limited Hefei 230093China Yanqi Lake Beijing Institute of Mathematical Sciences and Applications Beijing 101408China College of Land Resources and Environment Jiangxi Agricultural UniversityNanchang 330045China Monitoring Station for Weather and Eco-Environment of WuGong Mountain Pingxiang 337000China School of Geographical Sciences Southwest UniversityChongqing 400715China Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China Faculty of Geographical Science Beijing Normal UniversityBeijing 100875China

The computer advances of the past century can be traced to the increase in their numbers on chips that has accompanied the miniaturization of ***,computers are nearing the fundamental limits of such miniaturization[1].Many practical problems require huge amounts of computational resources that exceed the capabilities of today's computers.A 54-qubit quantum computer on the other hand can solve in minutes a problem that would take a classical machine 10,000 years[2].

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The role of positive and negative citations in scientific evaluation

arXiv

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arXiv 2020年

作者： Bai, Xiaomei Lee, Ivan Ning, Zhaolong Tolba, Amr Xia, Feng Key Laboratory for Ubiquitous Network and Service Software of Liaoning Province School of Software Dalian University of Technology Dalian116620 China Computing Center Anshan Normal University Anshan114007 China School of Information Technology and Mathematical Sciences University of South Australia Australia Riyadh Community College King Saud University Riyadh11437 Saudi Arabia Mathematics and Computer Science Department Faculty of Science Menoufia University Egypt

Quantifying the impact of scientific papers objectively is crucial for research output assessment, which subsequently affects institution and country rankings, research funding allocations, academic recruitment and national/international scientific priorities. While most of the assessment schemes based on publication citations may potentially be manipulated through negative citations, in this study, we explore Conflict of Interest (COI) relationships and discover negative citations and subsequently weaken the associated citation strength. PANDORA (Positive And Negative COI- Distinguished Objective Rank Algorithm) has been developed, which captures the positive and negative COI, together with the positive and negative suspected COI relationships. In order to alleviate the influence caused by negative COI relationship, collaboration times, collaboration time span, citation times and citation time span are employed to determine the citing strength;while for positive COI relationship, we regard it as normal citation relationship. Furthermore, we calculate the impact of scholarly papers by PageRank and HITS algorithms, based on a credit allocation algorithm which is utilized to assess the impact of institutions fairly and objectively. Experiments are conducted on the publication dataset from American Physical Society (APS) dataset, and the results demonstrate that our method significantly outperforms the current solutions in Recommendation Intensity of list R at top-K and Spearman’s rank correlation coefficient at top-K. Copyright © 2020, The Authors. All rights reserved.

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To enhance power distribution network management of local power service enterprise by using cloud platform

To enhance power distribution network management of local po...

引用

International Conference on Information Science and technology (ICIST)

作者： Gang Xiong Timo R. Nyberg Pekka Hämäläinen Xisong Dong Yuan Liu Jiachen Hou Cloud Computing Center Chinese Academy of Sciences Dongguan CHINA Department of Industrial Engineering and Management Aalto University Aalto FINLAND Tekla Corporations Metsänpojankuja Espoo FINLAND Key Laboratory of Complex System Intelligent Science Chinese Academy of Sciences Beijing CHINA Nanjing Smart Energy Information Technology Co. LTD Nanjing CHINA Beijing Engineering Research Center of Intelligent Systems and Technology Chinese Academy of Sciences Beijing CHINA

The availability of new technologies in the areas of digital electronics, communications, internet, and computer technologies opens a door to build a smart grid, which can increase significantly the capacity, services and intelligence of power systems. This paper proposes a power distribution network management cloud platform based on Tekla Xpower. Proposed system can support the implementation of current power grid and/or the coming smart grid. Utilizing the existing computing and storage installations, cloud platform can integrate the existing resources to improve the computation and storage capacities, the data security of the entire system, and can increase application intelligence, service quality and decision-making capability as well. The four layer architecture of cloud platform is designed, and a pilot case study for DMS is provided.

关键词： Computer network reliability Reliability Databases Business Electronic mail Handheld computers

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An Improved CTU-level Rate Control Algorithm Based on Temporal Domain Motion Intensity

An Improved CTU-level Rate Control Algorithm Based on Tempor...

引用

International Symposium on Communications and Information Technologies (ISCIT)

作者： Shaokang Wang Songlin Sun Jiaqi Zou Ruotong Wu Zhilei Ling Xingtong Liu School of Information and Communication Engineering Beijing University of Posts and Telecommunications Beijing China Key Laboratory of Trustworthy Distributed Computing and Service (BUPT) Ministry of Education China Engineering Research Center of Blockchain and Network Convergence Technology Ministry of Education China Department of Electronics and Electrical Engineering University College London London UK Business School Beijing Normal University Beijing China

Rate control (RC) plays a vital role in Versatile Video Coding (VVC) and video transmission. However, the RC algorithm in VVC remains the problem that the process of updating model parameters only considers the impact of the current encoding block content, without considering the similarity and reference value between different Coding Tree Units (CTUs) in the temporal domain. As a result, the coding performance is not optimal. To address this problem and further optimize the RC of VVC, this paper proposes an improved CTU-level rate control model parameter updating algorithm based on temporal domain motion intensity and we integrate this algorithm into VTM 1S.0. Experiments show that the proposed algorithm achieves better coding performance than anchor with 0.74% and 1.03% BD-rate saving under the Low Delay B (LDB) and Random Access (RA) configurations, respectively, while obtaining smaller bitrate error under common test conditions.

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An Event-Driven service-Oriented Architecture for the Internet of Things

An Event-Driven Service-Oriented Architecture for the Intern...

引用

IEEE Asia-Pacific Conference on services computing (APSCC)

作者： Lina Lan Fei Li Bai Wang Lei Zhang Ruisheng Shi School of Network Education Beijing University of Posts and Telecommunications Beijing China Information Systems Institute Vienna University of Technology Vienna Austria Beijing University of Posts and Telecommunications Beijing Beijing CN School of Computer Beijing University of Posts and Telecommunications Beijing China Education Ministry Key Laboratory of Trustworthy Distributed Computing and Service Beijing University of Posts and Telecommunications Beijing China

IoT (Internet of Things) bridges the physical world and information space. IoT services are environment sensitive and event-driven. The new IoT service architecture should adapt to these features. This paper analyses IoT sensing service characteristics and proposes the future services architecture. It is focused on the middleware architecture and the interface presentation technology. In the middleware layer, the traditional SOA architecture is insufficient in the real-time response and parallel process of services execution, this paper proposes that the new sensing service system based on EDSOA (Event Driven SOA) architecture to support real-time, event-driven, and active service execution. At presentation layer, this paper presents the new IoT browser features including using augmented reality technology to input and output, and realize the superposition presentation of the physical world and abstract information. Through a use case and proof-of-concept implementation-road manhole covers monitoring system - we verify the feasibility of the proposed ideas and frameworks.

关键词： service-oriented architecture Sensors Computer architecture Real-time systems Browsers Cameras

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