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9th International Conference on Advances in Machinery, Materials science and Engineering Applications, MMSE 2023

作者： Yu, Ting Zhang, Fang Zhao, Li Lu, Xianjin Xie, Shijie Zhejiang Academy of Special Equipment Science Hangzhou310000 China Key Laboratory of Special Equipment Safety Testing Technology of Zhejiang Province Hangzhou310000 China

ISBN: (纸本)9781643684383

Stainless steel pipe is widely used in machinery manufacturing industry, mainly used as steam, liquefied natural gas, natural gas, various petroleum products transmission pipeline. China is the largest consumer of stainless steel tube in the world, and in recent years the total consumption of stainless steel accounted for more than 20% of the total consumption in the world. Stainless steel pipe has good mechanical properties and good corrosion resistance, so it is widely used in the ocean engineering and shipbuilding industry, which is widely used in offshore oil and gas fields, deep water pumps, offshore drilling platforms, seabed mining devices, warships and other aspects. In this paper, the leakage of stainless steel seamless steel pipe used by a company is studied to discuss the failure behavior of stainless steel seamless steel pipe. The microstructure analysis shows that the fracture surface has the characteristics of stress corrosion crack. Chemical composition analysis, chemical composition of the sample GB/T 13296-2013 'Seamless Stainless Steel Tubes for Boilers and Heat exchangers' requirements for S31708 stainless steel;SEM and EDS detection: the corrosion products of seamless steel pipe fracture and the scale composition in the tube were detected. The corrosive medium Cl was found in the scale composition detection, and no obvious corrosive medium was found in the corrosion products of the fracture surface. © 2023 The Authors.

关键词： Steel corrosion

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Pointing jitter correction in hollow-core fiber nonlinear systems based on LSTM

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Applied Optics 2025年第15期64卷 4324-4329页

作者： Li, KaiXuan Li, HongYang Song, Liwei Tian, Ye State Key Laboratory of Ultra-intense Laser Science and 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 School of Physics Science and Engineering Tongji University Shanghai200092 China

Hollow-core fiber has been widely used for laser spectrum broadening and pulse duration compression, and its performance is highly sensitive to pointing instability caused by environmental interference and system nonlinearity. Here, we propose a feedback control system based on a three-layer long short-term memory network for real-time pointing jitter correction, which reduces the beam pointing jitter from 4.04 and 4.64 µrad to 0.869 and 0.903 µrad in the horizontal and vertical directions, respectively. Our work demonstrates the application of machine learning in pointing stabilization of nonlinear systems and paves the way for highly stable few-cycle laser pulse generation. © 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.

关键词： Feedback control

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Application of Gaofen-5 hyperspectral data for uranium exploration：A case study of Weijing in Inner Mongolia, China 9

Application of Gaofen-5 hyperspectral data for uranium explo...

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9th Symposium on Novel Photoelectronic Detection technology and Applications

作者： Zhang, Yuantao Pan, Wei Yu, Zhangfa National Key Laboratory of Science and Technology on Remote Sensing Information and Image Analysis Beijing Research Institute of Uranium Geology Beijing China Beijing Research Institute of Uranium Geology China

ISBN: (纸本)9781510664432

Chinese Gaofen-5 (GF-5) satellite is the world's first full-spectrum hyperspectral satellite to achieve comprehensive observations of the atmosphere and land. The Advanced Hyperspectral Imager (AHSI) carried by GF-5 can acquire 330-chanel imagery covering 390~2500 nm. However, the application of GF-5 AHSI imagery in uranium exploration is currently less. In this paper, the AHSI imagery was used for prospecting uranium mineralization in the Weijing, Inner Mongolia, China. The matched filter (MF) and threshold segmentation were used for mapping goethite, Al-high, Al-medium and Al-poor sericite. And the principal component analysis (PCA) and gray-level co-occurrence matrix (GLCM) were used to extract the texture information of the study area. Subsequently, combined with geological information, the relationship between alteration information, texture complexity and uranium mineralization was discussed, and it was pointed out that goethite, Al-medium, Al-poor, and Al-high sericite and texture complexity in this area can be used as indicators of uranium mineralization. Finally, two prospects were delineated, which will guide the follow-up uranium exploration in this area and promote the application of GF-5 AHSI data. © 2023 SPIE.

关键词： Uranium

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Exploring Image Generation for UAV Change Detection

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IEEE/CAA Journal of Automatica Sinica 2022年第6期9卷 1061-1072页

作者： Xuan Li Haibin Duan Yonglin Tian Fei-Yue Wang Peng Cheng Laboratory Shenzhen 518000China IEEE State Key Laboratory of Virtual Reality Technology and Systems School of Automation Science and Electrical EngineeringBeihang UniversityBeijing 100083 Department of Automation University of Science and Technology of ChinaHefei 230027 State Key Laboratory for Management and Control of Complex Systems Institute of AutomationChinese Academy of SciencesBeijing 100190China Research Center for Computational Experiments and Parallel Systems Technology National University of Defense TechnologyChangsha 410073China

Change detection(CD)is becoming indispensable for unmanned aerial vehicles(UAVs),especially in the domain of water landing,rescue and ***,even the most advanced models require large amounts of data for model training and ***,sufficient labeled images with different imaging conditions are *** by computer graphics,we present a cloning method to simulate inland-water scene and collect an auto-labeled simulated *** simulated dataset consists of six challenges to test the effects of dynamic background,weather,and noise on change detection ***,we propose an image translation framework that translates simulated images to synthetic *** framework uses shared parameters(encoder and generator)and 22×22 receptive fields(discriminator)to generate realistic synthetic images as model training *** experimental results indicate that:1)different imaging challenges affect the performance of change detection models;2)compared with simulated images,synthetic images can effectively improve the accuracy of supervised models.

关键词： Change detection computer graphics image translation simulated images synthetic images unmanned aerial vehicles(UAVs)

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Mechanical behaviors of backfill-rock composites: Physical shear test and back-analysis

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第3期16卷 807-827页

作者： Jie Xin Quan Jiang Fengqiang Gong Lang Liu Chang Liu Qiang Liu Yao Yang Pengfei Chen State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China University of Chinese Academy of Sciences Beijing100049China School of Civil Engineering Southeast UniversityNanjing211189China Energy School Xi’an University of Science and TechnologyXi’an710054China

The shear behavior of backfill-rock composites is crucial for mine safety and the management of surface *** exposing the shear failure mechanism of backfill-rock composites,we conducted shear tests on backfill-rock composites under three constant normal loads,compared with the unfilled *** investigate the macro-and meso-failure characteristics of the samples in the shear tests,the cracking behavior of samples was recorded by a high-speed camera and acoustic emission *** parallel with the experimental test,the numerical models of backfill-rock composites and unfilled rock were established using the discrete element method to analyze the continuous-discontinuous shearing *** on the damage mechanics and statistics,a novel shear constitutive model was proposed to describe mechanical *** results show that backfill-rock composites had a special bimodal phenomenon of shearing load-deformation curve,*** first shearing peak corresponded to rock break and the second shearing peak induced by the broken of aeolian sand-cement/fly ash paste ***,the shearing characteristic curves of the backfill-rock composites could be roughly divided into four stages,*** shear failure of the specimens experienced:stage I:stress concentration;stage II:crack propagation;stage III:crack coalescence;stage IV:shearing *** numerical simulation shows that the existence of aeolian sand-cement/fly ash paste backfill inevitably altered the coalescence type and failure mode of the specimens and had a strengthening effect on the shear strength of backfillrock *** on damage mechanics and statistics,a shear constitutive model was proposed to describe the shear fracture characteristics of specimens,especially the bimodal ***,the micro-and meso-mechanisms of shear failure were discussed by combining the micro-test and numerical *** research can advance the better understanding of the shear behavior of

关键词： Physical simulation Backfill-rock composites Shear failure Cracking Shear constitutive model

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Effects of Diesel Concentration on the Thermal Conductivity,Specific Heat Capacity and Thermal Diffusivity of Diesel-Contaminated Soil

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Journal of Thermal science 2024年第2期33卷 696-709页

作者： WU Yuhao WU Yuefei LUO Gubai ZHANG Teng WANG Qing FAN Liwu SONG Xin YU Zitao Key Laboratory of Clean Energy and Carbon Neutrality of Zhejiang Province Zhejiang UniversityHangzhou310027China State Key Laboratory of Clean Energy Utilization Zhejiang UniversityHangzhou310027China Institute of Thermal Science and Power Systems School of Energy EngineeringZhejiang UniversityHangzhou310027China Center Environmental Protection Technology Company Limited Beijing100176China Institute of Soil Science Chinese Academy of SciencesNanjing210008China

High energy consumption is a serious issue associated with in situ thermal desorption(TD)remediation of sites contaminated by petroleum hydrocarbons(PHs).The knowledge on the thermophysical properties of contaminated soil can help predict accurately the transient temperature distribution in a remediation site,for the purpose of energy ***,such data are rarely reported for PH-contaminated *** this study,by taking diesel as a representative example for PHs,soil samples with constant dry bulk density but different diesel mass concentrations ranging from 0% to 20% were prepared,and the variations of their thermal conductivity,specific heat capacity and thermal diffusivity were measured and analyzed over a wide temperature range between 0℃ and 120℃.It was found that the effect of diesel concentration on the thermal conductivity of soil is negligible when it is below 1%.When diesel concentration is below 10%,the thermal conductivity of soil increases with raising the ***,when diesel concentration becomes above 10%,the change of the thermal conductivity of soil with temperature exhibits the opposite *** is mainly due to the competition between soil minerals and diesel,because the thermal conductivity of minerals increases with temperature,whereas the thermal conductivity of diesel decreases with *** analysis results showed that,compared with temperature,the diesel concentration has more significant effects on soil thermal *** of the diesel concentration,with the increase of temperature,the specific heat capacity of soil increases,while the thermal diffusivity of soil *** addition,the results of a control experiment exhibited that the relative differences of the thermal conductivity of the soil samples containing the same concentration of both diesel and a pure alkane are all below 10%,indicating that the results obtained with diesel in this study can be extended to the family of PHs.A theo

关键词： contaminated soil diesel concentration thermal conductivity specific heat capacity thermal diffusivity thermal desorption fractal model

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Modulation of marine heatwaves by salinity effect in the Northeast Pacific Ocean in 2013-2014

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Acta Oceanologica Sinica 2025年第1期44卷 17-27页

作者： Xiaokun Wang Hai Zhi Ronghua Zhang Jiaxiang Gao Pengfei Lin School of Atmospheric Sciences Nanjing University of Information Science and TechnologyNanjing 210044China Henan Meteorological Disaster Prevention Technology Center Zhengzhou 450003China School of Marine Sciences Nanjing University of Information Science and TechnologyNanjing 210044China Laoshan Laboratory Qingdao 266237China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

Marine heatwaves(MHWs)are extreme ocean events characterized by anomalously warm upper-ocean temperatures,posing significant threats to marine *** various factors driving MHWs have been extensively studied,the role of ocean salinity remains poorly *** study investigates the influence of salinity on the major 2013-2014 MHW event in the Northeast Pacific using reanalysis data and climate model *** results show that salinity variabilities are crucial for the development of the MHW ***,a significant negative correlation exists between sea surface temperature anomalies(SSTAs)and sea surface salinity anomalies(SSSAs)during the MHW,with the SSSAs emerging simultaneously with SSTAs in the same *** salinity anomalies(SAs)result in a shallower mixed layer,which suppresses vertical mixing and thus sustains the upper-ocean ***,salinity has a greater impact on mixed layer depth anomalies than *** sensitivity experiments further demonstrate that negative SAs during MHWs amplify positive SSTAs by enhancing upper-ocean stratification,intensifying the ***,our analysis indicates that the SAs are predominantly driven by local freshwater flux anomalies,which are mainly induced by positive precipitation anomalies during the MHW event.

关键词： marine heatwave salinity effect ocean stratification and mixing sea surface temperature Northeast Pacific Ocean

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Manipulation of a strigolactone transporter in tomato confers resistance to the parasitic weed broomrape

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The Innovation 2025年第3期6卷 60-72,59页

作者： Xinwei Ban Li Qin Jijun Yan Jianxin Wu Qianjin Li Xiao Su Yanrong Hao Qingliang Hu Liquan Kou Zongyun Yan Peiyong Xin Yuqin Zhang Lemeng Dong Harro Bouwmeester Hong Yu Qinghui Yu Sanwen Huang Tao Lin Qi Xie Yuhang Chen Jinfang Chu Xia Cui Jiayang Li Bing Wang State Key Laboratory of Seed Innovation and National Center for Plant Gene Research(Beijing) Institute of Genetics and Developmental BiologyInnovation Academy for Seed DesignChinese Academy of SciencesBeijing 100101China College of Advanced Agricultural Sciences University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Vegetable Biobreeding Sino-Dutch Joint Laboratory of Horticultural GenomicsInstitute of Vegetables and FlowersChinese Academy of Agricultural SciencesBeijing 100081China Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops College of HorticultureChina Agricultural UniversityBeijing 100081China Plant Hormone Biology Group Swammerdam Institute for Life SciencesUniversity of AmsterdamAmsterdam 1098 XHthe Netherlands Yazhouwan National Laboratory Sanya 572024China Key Laboratory of Genome Research and Genetic Improvement of Xinjiang Characteristic Fruits and Vegetables Institute of Horticultural CropsXinjiang Academy of Agricultural SciencesUrumqi 830000China College of Life Science and Technology Xinjiang UniversityUrumqi 830000China National Key Laboratory of Tropical Crop Breeding Shenzhen BranchGuangdong Laboratory of Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China National Key Laboratory of Tropical Crop Breeding Chinese Academy of Tropical Agricultural SciencesHaikou 571101China Key Laboratory of Quality and Safety Control for Subtropical Fruit and Vegetable Ministry of Agriculture and Rural AffairsCollege of Horticulture ScienceZhejiang A&F UniversityHangzhou 311300China

Parasitic weeds of the Orobanchaceae family cause substantial economic losses and pose significant threats to global ***,management of such parasitism is challenging,and very few resistance genes have been cloned and characterized in ***,we performed a genome-wide association study using 152 tomato accessions and identified SlABCG45 as a key gene that mediates host resistance to Phelipanche aegyptiaca by affecting the level of strigolactones(SLs)in root *** are synthesized and released by host plants and act as germination stimulants for parasitic *** found that SlABCG45 and its close homolog SlABCG44 were membrane-localized SL transporters with essential roles in exudation of SLs to the rhizosphere,resistance to Phelipanche and Orobanche,and upward transport of SLs from roots to *** a predominant environmental stimulant exacerbates parasitism,phosphorus deficiency dramatically induced SlABCG45 expression and weakly induced SlABCG44 expression via the transcription factors SlNSP1 and *** of SlABCG45 in tomato had little effect on yield traits in a broomrape-free field,but conferred increased resistance to different Phelipanche and Orobanche species,resulting in an30%yield increase in a Phelipanche-infested *** findings reveal that targeting a single gene by genome editing can confer broad-spectrum parasite resistance in tomato,providing an effective strategy for the sustainable control of parasitic plants in agriculture.

关键词： phelipanche aegyptiaca SlABCg parasitic weeds root exudatessls mediates host resistance genome wide association study strigolactone transporter resistance genes

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Research on Domain Event Extraction Methods Based on Pre-Trained Model

Research on Domain Event Extraction Methods Based on Pre-Tra...

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2022 International Conference on Signal Processing, Computer Networks, and Communications, SPCNC 2022

作者： Meng, Fanshen Zhang, Yonggang Liu, Xuhong Liu, Xiulei Yu, Junyang Institute of Data Science and Information Analysis Beijing Information Science & Technology University Beijing100029 China Center for Information Research Academy of Military Sciences Beijing100142 China Beijing Key Laboratory of Network Culture and Digital Communication Beijing Information Science & Technology University Beijing100029 China Beijing Advanced Innovation Center of Materials Genome Engineering Beijing Information Science & Technology University Beijing100029 China School of Software Henan University Henan 475001 China

ISBN: (纸本)9781510664616

One of the important research directions in information extraction is event extraction(EE). It aims at recognizing event types and event arguments from natural language texts, which is an important technical basis for artificial intelligence application that serves for the information work in business, science and technology, military and other fields. Currently, data annotation samples of the relevant field based on encyclopedia and news data are relatively rare and lack relevant datasets. Therefore, there are only a few public research on the event extraction in the relevant intelligence field. By integrating universal information extraction, the event extraction method which use the pre-trained model for the relevant intelligence field can handle the problem of rare data annotation samples for the event extraction in the relevant field. By expanding training samples automatically, the context information of encyclopedia and news data is learnt effectively to extract relevant events from encyclopedia and news data. Compared with other event extraction methods, using precision, recall and F1 value as assessment indicators, in event recognition tasks, the value of F1 enhances 1.26%, and in argument recognition tasks, the value of F1 enhances 1.58%. The method can significantly boost the extraction performance in small samples shown in the experimental results. © 2023 SPIE.

关键词： Information retrieval

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Gas-phase synthesis of Ti_(2)CCl_(2) enables an efficient catalyst for lithiumsulfur batteries

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The Innovation 2024年第1期5卷 33-40页

作者： Maoqiao Xiang Zihan Shen Jie Zheng Miao Song Qiya He Yafeng Yang Jiuyi Zhu Yuqi Geng Fen Yue Qinghua Dong Yu Ge Rui Wang Jiake Wei Weiliang Wang Haiming Huang Huigang Zhang Qingshan Zhu Chuanfang John Zhang State Key Laboratory of Multiphase Complex Systems Institute of Process EngineeringChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of the Chinese Academy of SciencesBeijing 100049China Innovation Academy for Green Manufacture Chinese Academy of SciencesBeijing 100190China China Nuclear Power Engineering Co. Ltd.117 West Third Ring RoadNorth SectionBeijing 100840China College of Materials Science&Engineering Sichuan UniversityChengdu 610065China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China School of Physics Guangdong Province Key Laboratory of Display Material and TechnologyCenter for Neutron Science and TechnologySun Yat-sen UniversityGuangzhou 510275China Solid State Physics&Material Research Laboratory School of Physics and Materials ScienceGuangzhou UniversityGuangzhou 510006China

MXenes have aroused intensive enthusiasm because of their exotic properties and promising ***,to date,they are usually synthesized by etching *** synthetic technologies provides more opportunities for innovation and may extend unexplored ***,we report a bottom-up gas-phase synthesis of Cl-terminated MXene(Ti_(2)CCl_(2)).The gas-phase synthesis endows Ti_(2)CCl_(2) with unique surface chemistry,high phase purity,and excellent metallic conductivity,which can be used to accelerate polysulfide conversion kinetics and dramatically prolong the cyclability of Li-S ***-depth mechanistic analysis deciphers the origin of the formation of Ti_(2)CCl_(2) and offers a paradigm for tuning MXene chemical vapor *** brief,the gas-phase synthesis transforms the synthesis of MXenes and unlocks the hardly achieved potentials of MXenes.

关键词： synthesis phase lithium

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