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High-Performance On-Orbit Intelligent Computing and Real-Time Services for Remote Sensing Satellites Based on Large-Scale Computing Power in Space

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IEEE Access 2025年 13卷 92114-92133页

作者： Guoping Wang Gang Wan Zhijuan Su Yang Wang Yutong Jia Gong Li Shi Liang Department of Surveying and Mapping and Space Environment Space Engineering University Beijing China Aerospace Information Research Institute Chinese Academy of Sciences Beijing China Key Laboratory of Target Cognition and Application Technology Beijing China Beijing Institute of Space Mechanics and Electricity Beijing China School of Artificial Intelligence Xidian University Xi’an China

The rapid advancement in Earth observation systems and satellite networks driven by commercial space has led to a significant increase in the number of remote sensing satellites, thereby establishing the groundwork for all-weather, continuous, cluster-collaborative observation. Following anti-irradiation hardening measures, low-cost commercial off-the-shelf (COTS) devices are effectively operated within intricate space environments, leading to substantial enhancements of the on-orbit computing capabilities of individual satellites. The onboard-distributed processing framework can be leveraged to fully utilize wide-area scattered space computing resources; accordingly, it is possible to automatically establish a network of neighboring satellites through inter-satellite communication links to construct a spatially distributed and computationally cooperative cloud computing environment in space. This enables the sharing of space computing resources and facilitates satellite-based mission coordination, reducing reliance on ground-based remote sensing satellite services while enhancing the response efficiency of remote sensing application services. The present paper provides a comprehensive review of the current development status, existing challenges, and problems faced by space-based, on-orbit remote sensing processing platforms and onboard intelligent processing algorithms; we start with the immediate application requirements of the remote sensing satellites used in in-orbit processing. In view of the anticipated surge in large-scale computing resources in space, a distributed processing architecture for remote sensing satellite data, based on large-scale onboard computing power, is constructed. The architecture is designed in detail, with attention paid to the physical architecture, the software architecture, the workflow, and the key technologies. Finally, three real-time service scenarios that align with the construction content of an ultra-low-orbit satellite cons

关键词： Satellites Remote sensing Space vehicles Real-time systems Satellite broadcasting Satellite constellations Earth Software Hyperspectral imaging Artificial intelligence

engineering Mesoporous Nascent Mno2 Colloids for Efficient Elimination of Emerging Organic Contaminants

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SSRN 2023年

作者： Liu, Zhuoyue Cheng, Dong Yin, Haochen Zhao, Jianghao Zhang, Jiale Chen, Rongzhi Yang, Shengjiong Wei, Jing Wang, Gen School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology Xi’an710055 China The Key Laboratory of Biomedical Information Engineering Ministry of Education State Key Lab of Transducer Technology School of Life Science and Technology Xi’an Jiaotong University Xi’an710049 China College of Resources and Environment University of Chinese Academy of Sciences Beijing100049 China

Nascent MnO2 colloids produced during permanganate oxidation process is highly oxidative and appealing for the oxidation of emerging organic contaminants (EOCs). However, the nascent MnO2 colloids usually show dense bulked structure which blocks the availability of the active sites and further enhancement of the reactivity. Herein, spherical nascent MnO2 colloids with mesoporous structure were synthesized via redox reactions between colloidal nanospheres of plant polyphenol (e.g., tannic acid) and permanganate. The mesoporous nascent MnO2 colloids shows highly exposure of active sites with abundant of surface-Mn (III) (16.2 mol%), and thus exhibits outstanding oxidation performance towards the oxidation of EOCs. Complete removal of bis-phenol A (BPA, 10 mg/L) was obtained with 1.0 mM of mesoporous nascent MnO2 colloids in 40 min at neutral pH. Mechanism study reveals that both Mn(III) and Mn(IV) contribute to the oxidation of BPA. The presence of surface-Mn(III) greatly promotes the reactivity of the mesoporous nascent MnO2 colloids, leading to a high kinetic of 0.12 min−1 during the initial 10 min. The nascent mesoporous MnO2 colloids exhibits high selectivity toward electron rich EOCs and good performance in complicated water matrix, revealing a promising potential for further application. This work provides a distinct case for engineering novel structured nascent MnO2 colloids for efficient elimination of EOCs in water. © 2023, The Authors. All rights reserved.

关键词： Oxidation

Tuning Interlayer and Mixed Vanadium Valences of V2o5 Via Organic and Inorganic Guests Co-Intercalation Enables Boosted Aqueous Zinc-Ion Storage

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SSRN 2023年

作者： Yan, Xiaoteng Feng, Xiaochen Tian, Zeyu Qi, Junjie Wang, Honghai Wang, Zhiying Li, Chunli Peng, Wenchao Liu, Jiapeng School of Chemical Engineering and Technology National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization Hebei University of Technology Tianjin300130 China College of Environment and Chemical Engineering Key Laboratory of Applied Chemistry Yanshan University Qinhuangdao066004 China School of Chemical Engineering and Technology National-Local Joint Engineering Laboratory for Energy Conservation in Chemical Process Integration and Resources Utilization Tianjin University Tianjin300072 China

Aqueous zinc-ion batteries (AZIBs) have gained great attention due to their nontoxicity, low-cost and high theoretical capacity. However, the scarcity of suitable cathode materials with excellent performance limits the practical application of AZIBs. Herein, we develop a conducting polymer (polyaniline) and divalent ions (Ca2+) co- intercalated method to synergistically regulate the property of V2O5 in order to enhance Zn2+ storage performance. The synergistic of co-insertion Ca2+ and polyaniline (PANI) not only enlarges the interlayer spacing but also regulates multiple oxidation states of vanadium, which dramatically improves the conductivity, diffusion kinetics and structural stability of host V2O5. Consequently, the resultant Ca/PANI/V2O5·nH2O (CPVO) as AZIBs cathodes exhibits extraordinary specific capacity of 512 mAh g–1 (0.5 A g–1) and cycling stability with an outstanding coulombic efficiency of around 100 % after 2000 cycles (25 A g–1). Moreover, the Zn2+ storage mechanism is elaborated by combining comprehensive characterizations and DFT calculations. © 2023, The Authors. All rights reserved.

关键词： Ions

Localized Corrosion Propagation and Long-Term Corrosion Monitor of Steel Reinforcement in Cracked Concrete Exposed to Marine environment

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SSRN 2023年

作者： Feng, Guangyan Jin, Zuquan Zhu, Deju Jiang, Yudan Wang, Xiaoxian Key Laboratory for Green & Advanced Civil Engineering Materials and Application Technology of Hunan Province College of Civil Engineering Hunan University Changsha410082 China Engineering Research Center of Concrete Technology in Marine Environment Ministry of Education Qingdao University of Technology Qingdao266033 China School of Material Science and Engineering Southeast University Nanjing211189 China

A novel custom-designed wire beam electrode (WBE) covered by mortar with different crack widths (0.1mm, 0.2mm, and 0.3mm) was applied to study the localized corrosion propagation of steel reinforcement exposed to marine environment. The evolution of corrosion current distribution maps and anodic areas were measured. Corrosion morphology of WBE and element distribution of cracked mortar were also recorded after 300 d seawater immersion. Additionally, cracked concrete specimens with steel reinforcedment were exposed to real marine environment for 1920 d and monitored by EIS methods. The results revealed that corrosion initiates from the crack, and then propagates to other electrodes through interface of steel-mortar measured by current mapping distribution of WBE technique. The corrosion propagation of steel covered by mortar with 0.1 mm crack is mainly induced by the diffusion of Cl. However, the corrosion propagation of steel covered by mortars with 0.2 and 0.3 mm cracks is determined by spread of corrosion products. The corrosion current density of steel reinforcement in cracked concrete increases exponentially with prolonged exposure time in real marine environment. The corrosion current density of steel reinforcement in concrete with a 0.1 mm longitudinal crack is 0.13 μA/cm2 after 1920 d exposure, while that of steel reinforcement in concrete with a 0.3 mm crack is 1.37 μA/cm2. © 2023, The Authors. All rights reserved.

关键词： Mortar

Soil moisture response to land use and topography across a semi-arid watershed: Implications for vegetation restoration on the Chinese Loess Plateau

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Journal of Mountain Science 2022年第1期19卷 103-120页

作者： XIA Lu BI Ru-tian SONG Xiao-yu HU Wei LYU Chun-juan XI Xu LI Huai-you College of Resources and Environment Shanxi Agricultural UniversityTaigu 030801China State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China Xi'an University of TechnologyXi'an 710048China The New Zealand Institute for Plant and Food Research Limited Private Bag 4704Christchurch 8140New Zealand School of Geography Science and Geomatics Engineering Suzhou University of Science and TechnologySuzhou 215000China Xifeng Scientific Experiment Station of Soil and Water Conservation Yellow River Conservancy CommissionQingyang 745000China

Soil moisture is a limiting factor of ecosystem development in the semi-arid Loess Plateau. Characterizing the soil moisture response to its dominant controlling factors, such as land use and topography, and quantifying the soil-water carrying capacity for revegetation is of great significance for vegetation restoration in this region. In this study, soil moisture was monitored to a depth of 2 m in three land use types(native grassland, introduced grassland,and forestland), two landforms(hillslope and gully),and two slope aspects(sunny and shady) in the Nanxiaohegou watershed of the Loess Plateau,Northwest China. The MIKE SHE model was then applied to simulate the soil moisture dynamics under different conditions and determine the optimal plant coverage. Results showed that the average soil moisture was higher in native grassland than in introduced grassland and Platycladus orientalis forestland for a given topographic condition;however,a high soil moisture content was found in Robinia pseudoacacia forestland, with a value that was even higher than the native grassland of a sunny slope. The divergent results in the two forestlands were likely attributed to the differences in plant coverage. Gully regions and shady slopes usually had higher soil moisture, while lower soil moisture was usually distributed on the hillslope and sunny ***, the mean absolute relative error and Nash-Sutcliffe efficiency coefficient of the MIKE SHE model ranged between 2.8%–7.8% and 0.550–0.902,respectively, indicating that the model could effectively simulate the soil moisture dynamics. The optimal plant coverage was thus determined for hillslope P. orientalis by the model, corresponding to a leaf area index(LAI) value of 1.92. Therefore, for sustainable revegetation on the Loess Plateau,selecting suitable land use types(natural vegetation),controlling the planting density/LAI, and selecting proper planting locations(gully and shady slope regions) should be considered by loca

关键词： Soil moisture MIKE SHE Optimal plant coverage Land use Topography

Characteristic analysis of layered PMSEs measured with different elevation angles at VHF based on an experimental case

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Earth and Planetary Physics 2021年第1期5卷 42-51页

作者： ShuCan Ge HaiLong Li Bin Xu Tong Xu Lin Meng MaoYan Wang Abdel Hannachi MengYan Zhu Lina Broman Safi Ullah Abdur Rauf School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaChengdu 610054China National Key Laboratory of Electromagnetic Environment China Research Institute of Radiowave PropagationQingdao 266107China School of Physics University of Electronic Science and Technology of ChinaChengdu 610054China Department of Meteorology Stockholm UniversityStockholm SE-106-91Sweden

Polar Mesosphere Summer Echoes(PMSEs)are very strong radar echoes observed at altitudes near the polar summer *** of the essential properties of these radar echoes is that they can give useful diagnostic information about the physics of the scattering *** this paper,the related characteristics of PMSEs measured with the European Incoherent SCATter Very High Frequency(EISCAT VHF)224 MHz radar on 13–15 July 2010 are studied at different elevation angles from 78°to 90°.It is found that the PMSEs peak power and strongest PMSEs average power occur at the same elevation *** interesting is that the strongest PMSEs occur at off-vertical angles when a PMSEs has a layered(multilayer)*** reflection may have more significant effects on PMSEs when there are double or multilayer *** explanations regarding these observations are discussed.

关键词： Polar Mesosphere Summer Echoes off-vertical angles layered structure

Assessment of Runoff Generation Capacity and Total Runoff Contribution for Different Landscapes in Alpine and Permafrost Watershed

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SSRN 2024年

作者： Qin, Jia Yang, Bingfeng Zhang, Yongyong Zhao, Qiudong Chang, Yaping Cui, Junhao Ding, Yongjian State Key Laboratory of Cryospheric Sciences Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou730000 China Key Laboratory of Cryospheric Sciences and Frozen Soil Engineering Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou730000 China Tanggula Mountain Cryosphere and Environment Observation and Research Station of Tibet Autonomous Region Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou730000 China University of Chinese Academy of Sciences Beijing100049 China School of Civil Engineering Lanzhou University of Technology Lanzhou730050 China Key Laboratory of Water Cycle and Related Land Surface Processes Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China

Alpine vegetation, cold deserts, and glacial landscapes have a significant impact on runoff generation and convergence in cold and alpine regions. The existing mountain permafrost makes these impacts more complex. To clearly understand the special regulation of alpine landscapes on runoff, the optimal variable infiltration capacity (VIC) model was applied to simulate and assess the spatiotemporal characteristics of the runoff generation capacity and contribution of different landscapes in a typical alpine permafrost watershed: The upper reaches of the Shule River (USR) basin. Glaciers, alpine meadows, cold deserts, and barren landscape zones are the four major runoff generation regions, generating approximately 95% of the USR runoff. The runoff depth in each landscape zone was calculated to express its "runoff generation capacity," with an order of: glacier > cold desert > barren > alpine grassland > alpine meadow > shrub > swamp meadow. The alpine regions above 4000 m in altitude are the main runoff generation region, and "runoff generation capacity" gradually decreases from high altitudes to low altitudes in the alpine basin. Because of seasonal differences in rainfall distribution, glacier melting, and permafrost thawing-freezing, the dominant landscape types contributing to runoff varied monthly. Permafrost degradation makes summer runoff generated in vegetation landscape zones decrease. For example, the alpine meadow and swamp meadow landscape zones in the USR basin showed a decreasing rate of over 25% during June–August. These findings enhance our understanding of the mechanisms of runoff generation and convergence in the cold and alpine watersheds of the Northern Hemisphere. © 2024, The Authors. All rights reserved.

关键词： Runoff

Mechanism of the Hydration Process of Drinking Water Treatment Aluminum Sludge in Composite Cementitious Materials

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SSRN 2022年

作者： Yang, Jing Lu, Jinsuo Chen, Shuoyu Ren, Yujie Zhang, Zhiqiang Chen, Kunyu Huang, Xingxing Zhao, Hang Wang, Xuan School of Environmental and Municipal Engineering Xi’an University of Architecture and Technology Xi'An710055 China Key Laboratory of Northwest Water Resources Environment and Ecology Ministry of Education China Key Laboratory of Environmental Engineering Shaanxi Province China

As a byproduct of water treatment, drinking water treatment aluminum sludge (DWTAS) has challenges related to imperfect treatment and disposal, which has caused potential harm to human health and the environment. In this paper, heat treatment DWTAS as an additive material was used to prepare a compound cementitious materials. The results showed that DWTAS-800°C is fully activated after thermal decomposition to form incompletely crystallized highly active γ-Al2O3 and active SiO2, which occur hydration reaction. The hydration process of compound cementitious materials was affected by the DWTAS filling effect, dilution effect, and pozzolanic activity. The addition of DWTAS-800 ℃ promoted the formation of Al-containing hydrates such as C-A-H, C-S-A-H, and Al(OH)3, and consumed CH generated by cement hydration. The addition of DWTAS-800 °C improved the compressive strength of the mortar test block. When cured for 90 days, the compressive strength of the mortar with 30 % DWTAS-800 °C reached 44.86 MPa. The dynamic process was well simulated by Krstulović-Dabić hydration kinetics model. This study provided a methodology for the fabrication of environmentally friendly and cost-effective compound cementitious materials, and proposed a "waste-to-resource" strategy for the sustainable management of typical solid wastes. © 2022, The Authors. All rights reserved.

关键词： Aluminum oxide

Polyaniline-wrapped corn straw implanted ZnS quantum dots catalysts for efficient photocatalytic nitrate reduction and in situ formic acid generation

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SSRN 2022年

作者： Yueming, Ren Wang, Shuo Zhao, Ying Feng, Jing Wei, Tong Ma, Jun Bai, Chengying Key Laboratory of Superlight Materials and Surface Technology Ministry of Education College of Materials Science and Chemical Engineering Harbin Engineering University Harbin150001 China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin150090 China

Photocatalytic reduction to harmless nitrogen gas is considered a promising method for the removal of nitrate from water. However, achieving high efficiency of photocatalytic nitrate reduction, especially without the assistance of a hole scavenger, remains a critical issue. Herein, PANI-CS (PC) is prepared by in-situ polymerization of aniline on the surface of biomass corn straw, and then ZnS QDS is loaded to synthesize ZnS QDs-PANI-CS (ZPC) catalysts for photocatalytic reduction of nitrate. The optimized ZPC shows highly selective and efficient photocatalytic reduction of NO3- without sacrificial agents, with the 0.8% ZPC delivering an excellent nitrate removal rate of 98.4% and N2 selectivity of 96.8%. Outstanding catalytic performance is attributed to the ZPC having higher electron mobility and longer electron lifetime. Additionally, ZnS QDs induce the conversion of the quinone ring of PANI to the benzene ring, thereby improving the reducibility of the catalyst. Most importantly, The carbon-sulfur double bond on the ZnS quantum dots and the bicarbonate on the surface of the straw are the sources of formic acid, which provides great help for the production of CO2 •- with reduction activity. The introduction of ZnS QDs also enriches the Lewis acid sites on the ZPC surface, thereby enhancing the N2 selectivity, and simultaneity, the stability of the composite is consolidated due to the formation of N-Zn covalent bonds, laying the foundation for the commercialization of the catalyst. This work introduces the characteristics of self-produced formic acid into photocatalysts through ingenious design, which provides a new idea for the photocatalytic treatment of nitrate wastewater. © 2022, The Authors. All rights reserved.

关键词： Semiconductor quantum dots