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Environmental pollution (Barking, Essex : 1987) 2023年 329卷 121714页

作者： Jun Liu Hao Yin Xiao Tang Tong Zhu Qiang Zhang Zhu Liu XiaoLong Tang HongHong Yi Department of Environmental Engineering School of Energy and Environmental Engineering University of Science and Technology Beijing Beijing 100083 PR China Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants University of Science and Technology Beijing Beijing 100083 PR China Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System Science Tsinghua University Beijing 100084 PR China. Ministry of Education Key Laboratory for Earth System Modeling Department of Earth System Science Tsinghua University Beijing 100084 PR China School of Population and Public Health The University of British Columbia Vancouver BC Canada Energy and Resources Group University of California Berkeley CA USA. State Key Laboratory of Atmospheric Boundary Physics and Atmospheric Chemistry Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 PR China. State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing 100871 PR China. Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants University of Science and Technology Beijing Beijing 100083 PR China. Beijing Key Laboratory of Resource-oriented Treatment of Industrial Pollutants University of Science and Technology Beijing Beijing 100083 PR China. Electronic address: yihonghong@***.

Cross-receptive Focused Inference Network for Lightweight Image Super-Resolution

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arXiv 2022年

作者： Li, Wenjie Li, Juncheng Gao, Guangwei Deng, Weihong Zhou, Jiantao Yang, Jian Qi, Guo-Jun The Intelligent Visual Information Perception Laboratory Institute of Advanced Technology Nanjing University of Posts and Telecommunications Nanjing210046 China The Provincial Key Laboratory for Computer Information Processing Technology Soochow University Suzhou215006 China The School of Communication and Information Engineering Shanghai University Shanghai200444 China Jiangsu Key Laboratory of Image and Video Understanding for Social Safety Nanjing University of Science and Technology Nanjing210094 China The Pattern Recognition and Intelligent System Laboratory School of Artificial Intelligence Beijing University of Posts and Telecommunications Beijing100876 China The State Key Laboratory of Internet of Things for Smart City Department of Computer and Information Science Faculty of Science and Technology University of Macau 999078 China The School of Computer Science and Technology Nanjing University of Science and Technology Nanjing210094 China The Research Center for Industries of the Future The School of Engineering Westlake University Hangzhou310024 China OPPO Research SeattleWA98101 United States

Recently, Transformer-based methods have shown impressive performance in single image super-resolution (SISR) tasks due to the ability of global feature extraction. However, the capabilities of Transformers that need to incorporate contextual information to extract features dynamically are neglected. To address this issue, we propose a lightweight Cross-receptive Focused Inference Network (CFIN) that consists of a cascade of CT Blocks mixed with CNN and Transformer. Specifically, in the CT block, we first propose a CNN-based Cross-Scale Information Aggregation Module (CIAM) to enable the model to better focus on potentially helpful information to improve the efficiency of the Transformer phase. Then, we design a novel Cross-receptive Field Guided Transformer (CFGT) to enable the selection of contextual information required for reconstruction by using a modulated convolutional kernel that understands the current semantic information and exploits the information interaction within different self-attention. Extensive experiments have shown that our proposed CFIN can effectively reconstruct images using contextual information, and it can strike a good balance between computational cost and model performance as an efficient model. Source codes will be available at https://***/IVIPLab/CFIN. Copyright © 2022, The Authors. All rights reserved.

关键词： Semantics

COVID-19 causes record decline in global CO2 emissions

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arXiv 2020年

作者： Liu, Zhu Ciais, Philippe Deng, Zhu Lei, Ruixue Davis, Steven J. Feng, Sha Zheng, Bo Cui, Duo Dou, Xinyu He, Pan Zhu, Biqing Lu, Chenxi Ke, Piyu Sun, Taochun Wang, Yuan Yue, Xu Wang, Yilong Lei, Yadong Zhou, Hao Cai, Zhaonan Wu, Yuhui Guo, Runtao Han, Tingxuan Xue, Jinjun Boucher, Olivier Boucher, Eulalie Chevallier, Frederic Wei, Yimin Zhong, Haiwang Kang, Chongqing Zhang, Ning Chen, Bin Xi, Fengming Marie, François Zhang, Qiang Guan, Dabo Gong, Peng Kammen, Daniel M. He, Kebin Schellnhuber, Hans Joachim Department of EarthSystem Science Tsinghua University Beijing100084 China Laboratoire des Sciences du Climate et de l'Environnement LSCE Orme de Merisiers Gif-sur-Yvette91191 France Department of Meteorology andAtmospheric Science The Pennsylvania State University University ParkPA16802 United States Department of Earth System Science University of California Irvine 3232 Croul Hall IrvineCA92697-3100 United States Division of Geological and Planetary Sciences California Institute of Technology PasadenaCA United States Jet Propulsion Laboratory California Institute of Technology PasadenaCA United States Nanjing210044 China Key Laboratory of Land Surface Pattern and Simulation Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China Climate Change Research Center Institute of Atmospheric Physics Chinese Academy of Sciences Beijing100029 China Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric Physics Chinese Academy of Sciences Beijing100029 China School of Environment Tsinghua University Beijing100084 China School of Mat hemat ical School T singhua University Beijing100084 China Department of Mathematical Sciences Tsinghua University Beijing100084 China Center of Hubei Cooperative Innovation for Emissions Trading System Wuhan China Faculty of Management and Economics Kunming University of Science and Technology 13 Kunming China Economic Research Centre of Nagoya University Furo-cho Chikusa-ku Nagoya Japan Institute Pierre-Simon Laplace Sorbonne Université CNRS Paris France Center for Energy and Environmental Policy Research Beijing Institute of Technology Beijing China Department of Electrical Engineering Tsinghua University Beijing100084 China Jinan University Guangzhou China Beijing Normal University Beijing China Institute of Applied Ecology Chinese Academy of Sciences Shenyang China Energy and Resources Group Goldman School of Pub

The considerable cessation of human activities during the COVID-19 pandemic has affected global energy use and CO2 emissions. Here we show the unprecedented decrease in global fossil CO2 emissions from January to April 2020 was of 7.8% (938 Mt CO2 with a +6.8% of 2-σ uncertainty) when compared with the period last year. In addition other emerging estimates of COVID impacts based on monthly energy supply1 or estimated parameters2, this study contributes to another step that constructed the near-real-time daily CO2 emission inventories based on activity from power generation (for 29 countries), industry (for 73 countries), road transportation (for 406 cities), aviation and maritime transportation and commercial and residential sectors emissions (for206 countries). The estimates distinguished the decline of CO2 due to COVID-19 from the daily, weekly and seasonal variations as well as the holiday events. The COVID-related decreases in CO2 emissions in road transportation (340.4 Mt CO2, -15.5%), power (292.5 Mt CO2, -6.4% compared to 2019), industry (136.2 Mt CO2, -4.4%), aviation (92.8 Mt CO2, -28.9%), residential (43.4 Mt CO2, - 2.7%), and international shipping (35.9Mt CO2, -15%). Regionally, decreases in China were the largest and earliest (234.5 Mt CO2,-6.9%), followed by Europe (EU-27 & UK) (138.3 Mt CO2, -12.0%) and the U.S. (162.4 Mt CO2, -9.5%). The declines of CO2 are consistent with regional nitrogen oxides concentrations observed by satellites and ground-based networks, but the calculated signal of emissions decreases (about 1Gt CO2) will have little impacts (less than 0.13ppm by April 30, 2020) on the overserved global CO2 concertation. However, with observed fast CO2 recovery in China and partial re-opening globally, our findings suggest the longer-term effects on CO2 emissions are unknown and should be carefully monitored using multiple measures. Copyright © 2020, The Authors. All rights reserved.

关键词： Carbon dioxide

Effects of nonlinear gradient index on radiative heat transfer in a one-dimensional medium by the DRESOR method

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Journal of Physics: Conference Series 2012年第1期369卷

作者： Z C Wang Q Cheng G H Wang Z F Huang H C Zhou State Key Laboratory of Coal Combustion Huazhong University of Science and Technology Wuhan 430074 Hubei People's Republic of China State Key Laboratory of Control & Simulation of Power System & Generation Equipment Department of Thermal Engineering Tsinghua University Beijing 10084 P. R. China To whom any correspondence should be addressed

The DRESOR (Distribution of Ratios of Energy Scattered by the medium Or Reflected by the boundary surface) method is applied for radiative heat transfer in a one-dimensional medium with a nonlinear gradient index and gray boundary surfaces. In this proposed method, the DRESOR values calculated by the Monte Carlo method express quantitatively the impact of scattering on radiative transfer and the radiative intensity with high directional resolution of high precision can be easily obtained. With given media characteristics and boundary conditions, the temperature and radiative flux distributions inside the medium are calculated under the condition of radiative equilibrium. It is shown, in the cases studied, that the DRESOR method has a good accuracy. The temperature distributions have a node with different kinds of sine changed gradient index distributions under the same boundary emissivity. The impact of the gradient index on the radiative heat transfer is considerable, and the same as that of the ratios of its amplitude and average index. Besides, the effects of optical thickness, boundary emissivity and scattering phase function on radiative transfer also should be paid adequate attention.

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Correction to: What are the dominant influencing factors on the soil erosion evolution process in the Yellow River Basin?

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Earth Science Informatics 2021年第4期14卷 1917-1917页

作者： Wu, Hongwei Guo, Bing Xue, Haorun Zang, Wenqian Han, Baomin Yang, Fei Lu, Yuefeng Wei, Cuixia School of Civil Architectural Engineering Shandong University of Technology Zibo China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources Research of Chinese Academy of Sciences Beijing China Key Laboratory of Urban Land Resources Monitoring and Simulation Ministry of Natural Resources Shenzhen China International School Beijing University of Posts and Telecommunications Beijing China Aerospace Information Research Institute Chinese Academy of Sciences Beijing China

Milestones in Autonomous Driving and Intelligent Vehicles: Survey of Surveys

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arXiv 2023年

作者： Chen, Long Li, Yuchen Huang, Chao Li, Bai Xing, Yang Tian, Daxin Li, Li Hu, Zhongxu Na, Xiaoxiang Li, Zixuan Teng, Siyu Lv, Chen Wang, Jinjun Cao, Dongpu Zheng, Nanning Wang, Fei-Yue The State Key Laboratory of Management and Control for Complex Systems Institute of Automation Chinese Academy of Sciences Beijing100190 China Waytous Ltd United Kingdom BNU-HKBU United International College Zhuhai519087 China Hong Kong Baptist University Kowloon999077 Hong Kong The Department of Industrial and System Engineering Hong Kong Polytechnical University Hong Kong The College of Mechanical and Vehicle Engineering Hunan University China The School of Aerospace Transport and Manufacturing Cranfield University United Kingdom The School of Transportation Science and Engineering Beihang University China The Department of Automation Tsinghua University China The Department of Mechanical and Aerospace Engineering Nanyang Technological University Singapore The Centre for Sustainable Road Freight University of Cambridge United Kingdom The School of Mechanical Engineering Tsinghua University China The College of Artificial Intelligence Xi’an Jiaotong University China

Interest in autonomous driving (AD) and intelligent vehicles (IVs) is growing at a rapid pace due to the convenience, safety, and economic benefits. Although a number of surveys have reviewed research achievements in this field, they are still limited in specific tasks, lack of systematic summary and research directions in the future. Here we propose a Survey of Surveys (SoS) for total technologies of AD and IVs that reviews the history, summarizes the milestones, and provides the perspectives, ethics, and future research directions. To our knowledge, this article is the first SoS with milestones in AD and IVs, which constitutes our complete research work together with two other technical surveys. We anticipate that this article will bring novel and diverse insights to researchers and abecedarians, and serve as a bridge between past and future. Copyright © 2023, The Authors. All rights reserved.

关键词： Autonomous vehicles

Multi-GNSS simulation and its positioning performance for static and dynamic users

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Multi-GNSS simulation and its positioning performance for st...

International Symposium on Autonomous systems (ISAS)

作者： Kun Li Mengzhi Gao Shuaiyong Zheng Xuanwen Wang Xiaoqin Jin Peng Yang Jianlei Yang Jing Lu Gaole Yao School of Integrated Circuit Science and Engineering Tianjin University of Technology Tianjin China College of Artificial Intelligence Nankai University Tianjin China School of Computer Science and Engineering Tianjin University of Technology Tianjin China State Key Laboratory of Satellite Navigation System and Equipment Technology The 54th Research Institute of China Electronics Technology Group Corporation Shijiazhuang China Land Satellite Remote Sensing Application Center Ministry of Natural Resources Beijing China Tianjin AtoN Division The Navigation Guarantee Centre of North China Sea Tianjin China

Global navigation satellite system plays an important role in military and civil fields, providing global positioning, navigation and timing services in real time. Unfortunately, the services provided by single constellation or double constellations cannot meet the requirements of high-level navigation, and there are still some problems such as low positioning accuracy and low number of visible satellites at specific circumstances to be solved. In this paper, multi-GNSSs are constructed and their global positioning performance is analyzed with respect to static and dynamic users. Results show that with more constellations, the position dilution of precision is decreased, and the number of visible satellites and the positioning accuracy are improved, which reveals that compared with single constellation or double constellations, multi-GNSSs can obviously improve the positioning performance. The methodology proposed can serve as a technical reference for national integrated PNT systems.

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AFDM-SCMA: A Promising Waveform for Massive Connectivity over High Mobility Channels

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arXiv 2023年

作者： Luo, Qu Xiao, Pei Liu, Zilong Wan, Ziwei Nikolaos, Thomos Gao, Zhen He, Ziming The 5G & 6G Innovation Centre University of Surrey United Kingdom The School of Computer Science and Electronics Engineering University of Essex United Kingdom The School of Information and Electronics Beijing Institute of Technology Beijing100081 China The 5G & 6G Innovation Centre University of Surrey GuildfordGU2 7XH United Kingdom BIT Zhuhai519088 China The MIIT Key Laboratory of Complex-Field Intelligent Sensing BIT Beijing100081 China Jinan250307 China Jiaxing314019 China The Samsung Cambridge Solution Centre System LSI Samsung Electronics CambridgeCB4 0DS United Kingdom

This paper studies the affine frequency division multiplexing (AFDM)-empowered sparse code multiple access (SCMA) system, referred to as AFDM-SCMA, for supporting massive connectivity in high-mobility environments. First, by placing the sparse codewords on the AFDM chirp subcarriers, the input-output (I/O) relation of AFDM-SCMA systems is presented. Next, we delve into the generalized receiver design, chirp rate selection, and error rate performance of the proposed AFDM-SCMA. The proposed AFDM-SCMA is shown to provide a general framework and subsume the existing OFDM-SCMA as a special case. Third, for efficient transceiver design, we further propose a class of sparse codebooks for simplifying the I/O relation, referred to as I/O relation-inspired codebook design in this paper. Building upon these codebooks, we propose a novel iterative detection and decoding scheme with linear minimum mean square error (LMMSE) estimator for both downlink and uplink channels based on orthogonal approximate message passing principles. Our numerical results demonstrate the superiority of the proposed AFDM-SCMA systems over OFDM-SCMA systems in terms of the error rate performance. We show that the proposed receiver can significantly enhance the error rate performance while reducing the detection complexity. © 2023, CC BY.

关键词： Mean square error

MET fusions and splicing variants convergently defne a subgroup of glioma sensitive to MET inhibitors

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Holistic Integrative Oncology 2022年第1期1卷 244-254页

作者： Ke-Nan Zhang Zheng Zhao Jing Chen Zhaoshi Bao Rui-Chao Chai Zhiyan Sun Lingxiang Wu Zhiliang Wang Hanjie Liu Quanhua Mu Huimin Hu Fan Zeng Zheng Wang Guanzhang Li Yuanhao Chang Qiangwei Wang Fan Wu Ying Zhang Yuqing Liu Chunjie Jiang Ulf Dietrich Kahlert Do-Hyun Nam Wei Zhang Chunsheng Kang Jiguang Wang Rongjie Tao Qianghu Wang Tao Jiang Beijing Neurosurgical Institute Capital Medical UniversityBeijingChina Department of Neurosurgery Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Department of Bioinformatics Nanjing Medical UniversityNanjingJiangsuChina Department of Chemical and Biological Engineering Divison of Life ScienceCenter for Systems Biology and Human Healthand State Key Laboratory of Molecular NeuroscienceThe Hong Kong University of Science and TechnologyHong KongChina Division of Diabe‑tes Endocrinologyand MetabolismDepartment of MedicineBaylor College of MedicineHoustonTXUSA Molecular and Experimental Surgery Faculty of Medicine and University Medicine MagdeburgMagdeburgGermany Institute for Refractory Cancer Research Samsung Medical CenterSeoulRepublic of Korea Department of Health Science&Technology Samsung Advanced Institute for Health Sciences&Technology(SAIHST)Sungkyunkwan UniversitySeoulRepublic of Korea Department of Neurosurgery Samsung Medical CenterSungkyunkwan University School of MedicineSeoulRepublic of Korea Laboratory of Neuro‑Oncology Ministry of Education and Tianjin CityTianjin Neurological InstituteTianjin Medical University General HospitalKey Laboratory of PostNeuro Injury Neuro-Repair and Regeneration in Central Nervous SystemTianjinChina Departments of Neurosurgery Shandong Cancer Hospital and InstituteShandong UniversityJinanShandongChina Center of Brain Tumor Beijing Institute for Brain DisordersBeijingChina China National Clinical Research Center for Neurological Diseases BeijingChina Research Unit of Accurate Diagnosis Treatmentand Translational Medicine of Brain TumorsChinese Academy of Medical SciencesBeijingChina

Purpose:Our previous study has shown that PTPRZ1-MET(ZM)fusion is a viable target for MET inhibitors in ***,the diversity and prevalence of somatic MET alterations in difuse gliomas are still elusive and need to be extensively characterized for identifying novel therapeutic ***:Totally,1,350 glioma patients and 31 patient-derived cells were collected from the Chinese Glioma Genome Atlas(CGGA)and published *** kinds of MET fusions and/or splicing variants(MET F/SVs)were identifed by bioinformatical ***-cell RNA sequencing(scRNA-seq)were used for *** vitro experiments of drug resistance were conducted for the possibility of MET-targeted ***:MET F/SVs but not genomic amplifcation,were highly enriched in the secondary glioblastomas(sGBM)and marked worse *** molecular and scRNA-seq analysis revealed that MET F/SVs were induced in the course of glioma evolution and highly associated with MET *** in vitro and the clinical study showed that cells and patients harboring MET F/SVs have better response to MET ***:Our fndings expanded the percentage of gliomas with abnormal MET alterations and suggested that a subgroup of gliomas harboring MET F/SVs may beneft from MET-targeted therapy.

关键词： MET variation Secondary glioblastoma Biomarker MET inhibitor Precision neuro-oncology

Typhoon-Induced Stormwater Drives Nutrient Dynamics and Triggers Phytoplankton Blooms in Laizhou Bay, China

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SSRN

SSRN 2023年

作者： Li, Hongguan Li, Shanshan Zhang, Mingzheng Li, Xiuren Xu, Zehao Ma, Haoyang Liang, Shengkang Song, Dehai Li, Junlong Ma, Yuanqing Qin, Huawei Ji, Diansheng Frontiers Science Center for Deep Ocean Multispheres and Earth System Key Laboratory of Marine Chemistry Theory and Technology Ministry of Education Ocean University of China Qingdao266100 China College of Chemistry and Chemical Engineering Ocean University of China Qingdao266100 China College of Oceanic and Atmospheric Sciences Ocean University of China Qingdao266100 China Laboratory for Marine Ecology and Environmental Science Qingdao National Laboratory for Marine Science and Technology Qingdao266237 China Key Laboratory of Physical Oceanography Ocean University of China Ministry of Education Qingdao National Laboratory for Marine Science and Technology Qingdao China State Environmental Protection Key Laboratory of Quality Control in Environmental Monitoring China National Environmental Monitoring Center Beijing100012 China Shandong Marine Resources and Environment Research Institute Yantai264000 China National Marine Environmental Monitoring Center China

The heavy rainfall brought by typhoons result in pulsed inputs of freshwater and nutrients, causing drastic changes in the offshore hydrographic and biogeochemical conditions in a short time. In this study, we evaluated the heavy rainfall impact of Typhoons Rumbia and Lekima on Laizhou Bay (LZB). We found that torrential rainfall significantly modified riverine nutrient concentrations, component ratios, and fluxes. Our results demonstrated that 9% and 16% of the annual riverine total nitrogen (TN) and total phosphorus (TP) fluxes were transported to the LZB within two weeks in Rumbia, and the proportions were 17% and 35% in Lekima, respectively. Influenced by terrestrial inputs, the sea surface temperature (SST) and sea surface salinity (SSS) decreased postRumbia, while the dissolved inorganic nitrogen (DIN) increased from 0.13 ± 0.13 mg/L to 0.47 ± 0.32 mg/L. Furthermore, the SST and SSS decreased by approximately 2.5 ℃ and 2.3 psu postLekima, and the concentration of DIN increased from 0.13 ± 0.08 mg/L to 0.58 ± 0.48 mg/L, which induced subsequent diatom blooms. However, rapid luxury uptake of dissolved inorganic phosphorus (DIP) by phytoplankton resulted in the LZB remaining under P-limited conditions. Freshwater and nutrient pulse input accelerated the growth of highly adaptable and small diatoms in coastal waters, and the dominant species transitioned to Skeletonema costatum after Lekima. We suggest that excess freshwater inputs alter the hydrodynamic structure and residence time, combined with other suitable factors, resulting in a dramatic increase in Noctiluca scintillans and the formation of harmful algal blooms (HABs) after a decline in diatom blooms. © 2023, The Authors. All rights reserved.

关键词： Nutrients