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Journal of Materials science & Technology 2022年第33期128卷 31-43页

作者： Chenchong Wang Kaiyu Zhu Peter Hedström Yong Li Wei Xu state Key Laboratory of Rolling and Automation Northeastern UniversityShenyang 110819China department of Materials science and Engineering KTH Royal Institute of TechnologyStockholm 10044Sweden

The martensite start temperature is a critical parameter for steels with metastable *** numerous models have been developed to predict the martensite start(Ms)temperature,the complexity of the martensitic transformation greatly limits their performance and *** this work,we apply deep data mining of thermodynamic calculations and deep learning to develop a generic model for *** data mining was used to establish a hierarchical database with three levels of ***,a convolutional neural network model,which can accurately treat the hierarchical data structure,was used to obtain the final *** integrating thermodynamic calculations,traditional machine learning and deep learning modeling,the final predictor model shows excellent generalizability and extensibility,*** performance both within and beyond the composition range of the original *** effects of 15 alloying elements were considered successfully using the proposed *** work suggests that,with the help of deep data mining considering the physical mechanisms,deep learning methods can partially mitigate the challenge with limited data in materials science and provide a means for solving complex problems with small databases.

关键词： Martensite transformation Data mining Deep learning Extensibility Small-sample problem

Oxygen ion conductivity of La_(0.8)Sr_(0.2)Ga_(0.83)Mg_(0.17-x)Co_xO_(3-δ) synthesized by laser rapid solidification

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Chinese Physics B 2013年第8期22卷 568-575页

作者：张洁袁超王俊俏梁二军晁明举 School of Physical science & Engineering and Key Laboratory of Materials Physics of Ministry of Education of China Zhengzhou University department of Physics and Electronic science Zhengzhou Normal University College of science Henan Agricultural University

Materials Lao.8Sro.2Gao.83Mgo.17_xCox03_6 with x = 0, 0.05, 0.085, 0.10, and 0.15 are synthesized by laser rapid solidification. It is shown that the samples prepared by laser rapid solidification give rise to unique spear-like or leaf-like microstructures which are orderly arranged and densely packed. Their electrical properties each show a general depen dence of the Co content and the total conductivities of Lao.8Sro.2Gao.83Mgo.085Coo.08503_6 prepared by laser rapid solidification are measured to be 0.067, 0.124, and 0.202 ***-1 at 600, 700, and 800 ℃, respectively, which are much higher than by conventional solid state reactions. Moreover, the electrical conductivities each as a function of the oxy gen partial pressure are also measured. It is shown that the samples with the Co content values 〈 8.5 mol% each exhibit basically ionic conduction while those for Co content values 〉 10 mol % each show ionic mixed electronic conduction under oxygen partial pressures from 10-16 atm （1 atm = 1.01325 x 105 Pa） to 0.98 atm. The improved ionic conductivity of ***.2Gao.83Mgo.085Coo.08503 prepared by laser rapid solidification compared with by solid state reactions is attributed to the unique microstructure of the sample generated during laser rapid solidification.

关键词： doped lanthanum gallate laser rapid solidification oxygen ion conductivity activation energy

Formation of Carbon Nitride Films by Nitrogen Ion Bombardment on C_(60) Films

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Chinese Physics Letters 1996年第9期13卷 714-717页

作者： REN Zhong-min DU Yuan-cheng YING Zhi-feng LI Fu-ming LIN Jing REN Yun-Zhu ZONG Xiang-fu department of Physics Fudan UniversityState Key Joint Laboratory for Materials Modification by LaserIonand Electron BeamsShanghai 200433 Institute of Materials science Fudan UniversityShanghai 200433

The synthesis of covalent carbon nitride films becomes an important subject in the materials research *** a new synthetic method two low-energy(400 and 1000eV)nitrogen ion beams are used to bombard on C_(60) thin films *** bombarded films are used for Raman and x-ray photoelectron spectroscopy(XPS)*** results of the analyses show that under the bombardment of 400eV nitrogen ion beam,the film still contains a large amount of undestructed C_(60) *** the case of l000eV bombardment,only a little amount of C_(60) molecules is kept *** experimental results also show that the destructed carbon species will combine chemically with nitrogen ions to form stable covalent carbon nitride,confirmed by the Raman peaks of,e.g.,*** XPS Nls and Cls lines also indicate the formation of covalent carbon nitride in the bombarded films.

关键词： field carbon chemically

Off line software for the DAMPE experiment

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Chinese Physics C 2017年第10期41卷 123-130页

作者：王驰刘栋魏逸丰张志永张云龙汪晓莲许咨宗黄光顺 Andrii Tykhonov 吴欣藏京京刘杨蒋维文思成伍健常进 state Key Laboratory of Particle Detection and Electronics University of Science and Technology of China department of Modern Physics University of Science and Technology of China DPNC Université de Genève Purple Mountain Observatory Chinese Academy of Sciences

A software system has been developed for the DArk Matter Particle Explorer（DAMPE） mission, a satellite-based experiment. The DAMPE software is mainly written in C＋＋ and steered using a Python script. This article presents an overview of the DAMPE offline software, including the major architecture design and specific implementation for simulation, calibration and reconstruction. The whole system has been successfully applied to DAMPE data analysis. Some results obtained using the system, from simulation and beam test experiments, are presented.

关键词： software architecture DAMPE abstract interface C++

Four billion years of ophiolites reveal secular trends in oceanic crust formation

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Geoscience Frontiers 2014年第4期5卷 571-603页

作者： Harald Furnes Maarten de Wit Yildirim Dilek department of Earth science and Centre for Geobiology University of BergenAllegt.415007 BergenNorway AEON and Earth Stewardship science Research Institute Nelson Mandela Metropolitan University 7701Port Elizabeth 6031South Africa department of Geology and Environmental Earth science Miami University state Key Laboratory of Geological Processes and Mineral Resources and School of Earth Science and Mineral ResourcesChina University of Geosciences

We combine a geological, geochemical and tectonic dataset from 118 ophiolite complexes of the major global Phanerozoic orogenic belts with similar datasets of ophiolites from 111 Precambrian greenstone belts to construct an overview of oceanic crust generation over 4 billion years. Geochemical discrimi- nation systematics built on immobile trace elements reveal that the basaltic units of the Phanerozoic ophiolites are dominantly subduction-related （75%）, linked to backarc processes and characterized by a strong MORB component, similar to ophiolites in Precambrian greenstone sequences （85%）. The remaining 25% Phanerozoic subduction-unrelated ophiolites are mainly （74%） of Mid-Ocean-Ridge type （MORB type）, in contrast to the equal proportion of RiftlContinental Margin, Plume, and MORB type ophiolites in the Precambrian greenstone belts. Throughout the Phanerozoic there are large geochemical variations in major and trace elements, but for average element values calculated in 5 bins of 100 million year intervals there are no obvious secular trends. By contrast, basaltic units in the ophiolites of the Precambrian greenstones （calculated in 12 bins of 250 million years intervals）, starting in late Paleo- to early Mesoproterozoic （ca. 2.0-1.8 Ga）, exhibit an apparent decrease in the average values of incom- patible elements such as Ti, P, Zr, Y and Nb, and an increase in the compatible elements Ni and Cr with deeper time to the end of the Archean and into the Hadean. These changes can be attributed to decreasing degrees of partial melting of the upper mantle from HadeanJArchean to Present. The onset of geochemical changes coincide with the timing of detectible changes in the structural architecture of the ophiolites such as greater volumes of gabbro and more common sheeted dyke complexes, and lesser occurrences of ocelli （varioles） in the pillow lavas in ophiolites younger than 2 Ga. The global data from the Precambrian ophiolites, representative of nearly 50% of all known

关键词： Phanerozoic and Precambrian greenstonebeltsOphiolite classificationSubduction-related ophiolitesSubduction-unrelated ophiolitesPrecambrian plate tectonics

Molecular signatures of soil-derived dissolved organic matter constrained by mineral weathering

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Fundamental Research 2023年第3期3卷 377-383页

作者： Ying-Hui Wang Peng Zhang Chen He Jian-Chun Yu Quan Shi Randy A.Dahlgren Robert G.M.Spencer Zhi-Bing Yang Jun-Jian Wang state Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China Guangdong Provincial Key Laboratory of soil and Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China state Key Laboratory of Water Resources and Hydropower Engineering science Wuhan UniversityWuhan 430072China state Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Shanghai Engineering Research Center of Hadal science and Technology College of Marine SciencesShanghai Ocean UniversityShanghai 201306China department of Land Air and Water ResourcesUniversity of California DavisDavis 95616United States department of Earth Ocean and Atmospheric ScienceFlorida State UniversityTallahassee 32306United States

Dissolved organic matter(DOM)in soils drives biogeochemical cycling and soil functions in different directions depending on its molecular ***,there is a distinct paucity of information concerning how the molecular signatures of soil DOM vary with different degrees of weathering across wide geographic ***,we resolved the DOM molecular signatures from 22 diverse Chinese reference soils and linked them with soil organic matter and weathering-related mineralogical *** mixed-effects models revealed that the yields of DOM were determined by soil organic carbon content,whereas the molecular signature of DOM was primarily constrained by the weathering-related *** soil weathering index showed a positive effect on the lability and a negative effect on the aromaticity of ***,DOM in highly weathered acidic soils featured more amino sugars,carbohydrates,and aliphatics,as well as less O-rich polyphenols and condensed aromatics,thereby conferring a higher DOM biolability and lower DOM *** study highlights the dominance of the weathering-related dimension in constraining the molecular signatures and potential functions of DOM in soils across a wide geographic scale.

关键词： soil organic matter Dissolved organic matter Chemical composition Molecular signature Mineral weathering

An overview of ML-based applications for next generation optical networks

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science China(Information sciences) 2020年第6期63卷 31-46页

作者： Ruoxuan GAO Lei LIU Xiaomin LIU Huazhi LUN Lilin YI Weisheng HU Qunbi ZHUGE Shanghai Institute for Advanced Communication and Data science State Key Laboratory of Advanced Optical Communication Systems and NetworksDepartment of Electronic Engineering Shanghai Jiao Tong University

Over the past few decades, the demand for the capacity and reliability of optical networks has continued to grow. In the meantime, optical networks with larger knowledge scales have become sources of numerous heterogeneous data. In order to handle these new challenges, many issues need to be resolved,among which the low-margin optical networks design, power optimization, routing and wavelength assignment(RWA), failure management are quite important. However, the use of traditional algorithms in the above four applications shows some shortcomings. Fortunately, artificial intelligence(AI), especially machine learning(ML), is regarded as one of the most promising methods to overcome these shortcomings. In this study, we review the applications of ML methods in solving these four issues. Although many ML-based researches have emerged, the applications of ML techniques in optical networks still face challenges. Therefore, we also discuss some possible future directions of investigating ML-based approaches in optical networks.

关键词： optical networks artificial intelligence machine learning system margin power optimization routing and wavelength assignment failure management

Dynamic evolution of Co species and morphological reconstruction on Co-N-C during the nitrate reduction reaction in neutral solution

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Nano Research 2025年第1期18卷 164-172页

作者： Yuanlin Fu Xiaoting Yang Ya Yu Kang Zhou Xiaoyang Ye Aoxiang Zhang Xiaojiao Hou Bingbing Chen Fuqiang Fan Yuhang Li Yu Fu department of Chemistry College of SciencesNortheastern UniversityShenyang 110819China department of Physical Education Shen Yang Institute of Science and TechnologyShenyang 110167China Sungrow Power Supply Co. Ltd.Hefei 230088China

The electrochemical nitrate reduction reaction(eNO_(3)^(-)RR)is considered an effective approach for converting nitrate-containing wastewater to *** adsorption and activation of NO_(3)^(-)is the critical step for many materials and the high energy barrier inhibits the continuation of the reduction *** Co nanoparticles encapsulated in the carbon layer we prepared spontaneously react with NO_(3)^(-)and the resulting Co^(2+)is then reduced by electroreduction to Co^(0),which circulates *** resulted in overcoming the energy input required for NO_(3)^(-)adsorption and conversion,thereby increasing the catalytic *** the same time,the morphology of the catalyst reconstructed from a dodecahedron to an interwoven nanosheet structure and the increased surface area also gives it better *** obtained Co(OH)_(2)@Co-N-C has an excellent eNO_(3)^(-)RR of 2774.7μg·h^(-1)·cm^(-2)with a Faraday efficiency of 81.4%in neutral *** the same time,the material-modified electrode can run stably for more than 100 *** work provides a new idea for the design of Co-based catalysts for eNO_(3)^(-)RR.

关键词： electrochemical nitrate reduction reaction Co-based catalyst dynamic evolution of Co species morphological reconstruction

Fabrication of a Retinal-protein Photoreceptor Array

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Chinese Journal of Chemistry 2012年第3期30卷 491-495页

作者：赵迎春吴佳黄伟达丁建东 state Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceFudan UniversityShanghai 200433China department of Biochemistry School of Life SciencesFudan UniversityShanghai 200433China

A pixel-architecture film of retinal proteins was prepared by an approach combining chemical, physical and biological technologies. Oriented multilayers of purple membrane composed of bacteriorhodopsin （BR） and lipids were patterned on an array of gold electrode pixels. In order to improve stability and resolution, the gene engineer- ing technique was employed to make a mutant of the protein BR by replacing the 36th amino acid residue from as- partic acid to cysteine with a thiol end group ready to react with gold; electric sedimentation was used to guarantee the high probability of formation of the Au-S bond and meanwhile to orient BR; further chemical crosslinking was introduced among layers of purple membranes to significantly enhance photoelectrical signals while keeping high stability. The non-bound BR region was eventually washed out by detergent, and the remaining BR pixels were thus detergent resistant due to chemical crosslinking among BR layers and covalent binding between the multilayer and the substrate. The protein array was confirmed to keep photoelectrical activity.

关键词： bacteriorhodopsin microarray protein chip biosensors photochemistry

Airborne PCDD/Fs in two e-waste recycling regions after stricter environmental regulations

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Journal of Environmental sciences 2017年第12期29卷 3-10页

作者： Manwen Zhang Guixian Feng Wenhua Yin Bing Xie Mingzhong Ren Zhencheng Xu Sukun Zhang Zongwei Cai Partner state Key Laboratory of Environmental and Biological Analysis Department of Chemistry Hong Kong Baptist University South China Institute of Environmental science Ministry of Environmental Protection

Since the 2010 s, the authorities of Guangdong province and local governments have enhanced law enforcement and environmental regulations to abolish open burning, acid washing, and other uncontrolled e-waste recycling activities. In this study, ambient air and indoor dust near different kinds of e-waste recycling processes were collected in Guiyu and Qingyuan to investigate the pollution status of particles and polychlorinated dibenzo-pdioxins and furans（PCDD/Fs） after stricter environmental regulations. PM_（2.5） and PCDD/Fs both showed significantly reduced levels in the two regions compared with the documented data. The congener distribution and principal component analysis results also confirmed the significant differences between the current PCDD/Fs pollution characterizations and the historical ones. The estimated total intake doses via air inhalation and dust ingestion of children in the recycling region of Guiyu ranged from 10 to 32 pg TEQ/（kg·day）, which far exceeded the tolerable daily intake（TDI） limit（1–4 pg TEQ/（kg·day）. Although the measurements showed a significant reduction of the release of PCDD/Fs, the pollution status was still considered severe in Guiyu town after stricter regulations were implemented.

关键词： Polychlorinated dibenzo-p-dioxins and furans E-waste recycling China Environmental regulation