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Large-scale Dynamics of Line-driven Winds with the Re-radiation Effect

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Research in Astronomy and Astrophysics 2023年第12期23卷 105-117页

作者： yi zhu Jinsen Xie School of Nuclear Science and Technology University of South ChinaHengyang 421001China

Previous simulations studying winds only focus on the line force due to photons from central active galactic *** properties of the winds will be when including the re-radiation force due to the scattered and reprocessed photons(i.e.,the re-radiation effect)?We perform simulations to study the large-scale dynamics of accretion disk winds driven by radiation line force and re-radiation *** the fiducial run,we find that the re-radiation force drives stronger outflows during the early *** the flows get into the steadiness,the UV radiation due to spectral lines dominates total radiation and the re-radiation effect could be *** opening angle of winds narrows as the initial gas density *** larger the gas density is,the stronger the re-radiation effect will *** MBH=10^(6)M_(⊙),ε=0.3,the outflows do become much stronger with the re-radiation effect and the winds still cannot escape from gravitational *** find that the detection probability of ultra-fast outflows and the properties of the winds are both consistent with the observations.

关键词： accretion-accretion disks-black hole physics-galaxies nuclei-stars winds-outflows

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溴乙烯在外电场中的解离性质研究

原子与分子物理学报 2025年第4期42卷 20-26页

作者：周华森韩博元努尔比耶·艾则孜章吴熠朱奕虹刘玉柱南京信息工程大学江苏省大气海洋光电探测重点实验室南京210044 江苏省大气环境与装备技术协同创新中心南京210044

溴乙烯具有极高的毒性,它不仅会污染环境,还会损害人类的身心健康.因此,研究它的分子结构及其解离方式,不仅具有重要的科学意义,而且也具有极高的社会意义.本文采用密度泛函理论(DFT),以B3LYP/6-31G++(d,p)基组,深入探索溴乙烯分子在0 V... 详细信息

溴乙烯具有极高的毒性,它不仅会污染环境,还会损害人类的身心健康.因此,研究它的分子结构及其解离方式,不仅具有重要的科学意义,而且也具有极高的社会意义.本文采用密度泛函理论(DFT),以B3LYP/6-31G++(d,p)基组,深入探索溴乙烯分子在0 V·nm^(-1)~80 V·nm^(-1)外电场的影响下,其分子结构和解离特性.通过计算,随着外电场的增强:分子总能量和碳碳双键(C=C)的键长减小,碳溴键(C-Br)的键长和偶极矩增大.能隙E_(G)先增大后减小,分子结构稳定性降低.红外光谱主要产生了6个特征吸收峰,且普遍存在红移现象.分子解离特性表现为:当外部电场强度升高时,势垒会显著减弱,直至达到154.26 V·nm^(-1)时,势垒就会完全消除,溴乙烯分子的解离能相应减弱,这表明,当外部电场强度升高时,溴乙烯分子会发生逐步的分解.因此,这一结论可以为进一步探讨溴乙烯分子和其相关的化合物的解离研究提供依据.

关键词：溴乙烯红外光谱外电场解离势能面降解

Joint user profiling with hierarchical attention networks

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Frontiers of Computer Science 2023年第3期17卷 133-143页

作者： Xiaojian LIU yi zhu Xindong WU Key Laboratory of Knowledge Engineering with Big Data(Hefei University of Technology) Ministry of EducationHefei 230009China School of Computer Science and Information Engineering Hefei University of TechnologyHefei 230009China School of Information Engineering Yangzhou UniversityYangzhou 225009China Mininglamp Academy of Sciences MininglampBeijing 100193China

User profiling by inferring user personality traits,such as age and gender,plays an increasingly important role in many real-world *** existing methods for user profiling either use only one type of data or ignore handling the noisy information of ***,they usually consider this problem from only one *** this paper,we propose a joint user profiling model with hierarchical attention networks(JUHA)to learn informative user representations for user *** JUHA method does user profiling based on both inner-user and inter-user *** explore inner-user features from user behaviors(e.g.,purchased items and posted blogs),and inter-user features from a user-user graph(where similar users could be connected to each other).JUHA learns basic sentence and bag representations from multiple separate sources of data(user behaviors)as the first round of data *** this module,convolutional neural networks(CNNs)are introduced to capture word and sentence features of age and gender while the self-attention mechanism is exploited to weaken the noisy *** this,we build another bag which contains a user-user ***-user features are learned from this bag using propagation information between linked users in the *** acquire more robust data,inter-user features and other inner-user bag representations are joined into each sentence in the current bag to learn the final bag ***,all of the bag representations are integrated to lean comprehensive user representation by the self-attention *** experimental results demonstrate that our approach outperforms several state-of-the-art methods and improves prediction performance.

关键词： user profiling hierarchical attention joint learning inner-user feature inter-user feature

Rare Earth Elements(La,Ce,Pr)Modified Co/NC Catalyst for Efficient and Stable Ammonia Decomposition to Hydrogen Production

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Journal of Wuhan University of Technology(Materials Science) 2024年第6期39卷 1372-1378页

作者： zhu yi PAN Hongfei State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China National Energy Key Laboratory for New Hydrogen-ammonia Energy Technologies Foshan Xianhu LaboratoryFoshan 528200China

Co/NC catalysts modified with rare earth elements(La,Ce,Pr)were prepared by pyrolysis of rare earth elements doped *** experimental results show that the modification of rare earth elements significantly improves the ammonia decomposition activity and stability of the Co/NC *** La-Co/NC catalyst can achieve an 82.3%ammonia decomposition and 18.4 mmol hydrogen production rate at 550℃with a GHSV of 20000 cm^(3)·h^(-1).Furthermore,no obvious performance degradation is observed after 72 hours of reaction for all rare earth elements modified *** is shown that the modification of rare earth elements significantly improves the surface alkalinity and surface chemical state of the catalyst,and thus improves the ammonia decomposition activity of the catalyst.A new type of high-performance ammonia decomposition Co-based catalyst is proposed,and the promoting effect of rare earth elements on the activity of ammonia decomposition is revealed.

关键词： hydrogen carrier hydrogen production ammonia decomposition rare earth elements cobalt-based catalysts

New fast algorithm for hypercomplex decomposition and hypercomplex cross-correlation

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Journal of Systems Engineering and Electronics 2010年第3期21卷 514-519页

作者： Chunhui zhu yi Shen Qiang Wang School of Astronautics Harbin Institute of Technology Harbin 150001 E R. China

In order to calculate the cross-correlation of two color images treated as vector in a holistic manner,a rapid vertical/parallel decomposition algorithm for quaternion is *** calculation for decomposition is reduced from 21 times to 4 times real number multiplications with the same *** algorithm for cross-correlation of color images based on decomposition in time domain is put forward,in which some properties pointed out in this paper can be utilized to reduce the computational *** results show the effectiveness and superiority of the proposed method.

关键词： color image processing color image cross-correlation quaternion decomposition hypercomplex.

Strain-induced martensitic transformation in biomedical Co-Cr-W-Ni alloys

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Rare Metals 2020年第3期39卷 241-249页

作者： Zi-yi zhu Li Meng Leng Chen School of Materials Science and Engineering University of Science and Technology BeijingBeijing100083China Metallurgical Technology Institute Central Iron and Steel Research InstituteBeijing100081China

The nucleation,variant selection,and orientation dependence of the strain-induced martensitic transformation(SIMT)process in biomedical Co-Cr-W-Ni alloys were *** experimental results show that theε-hexagonal-close-packed phase was preferentially formed at theΣ3 twin boundaries and high-angle grain boundaries during the tensile *** theoretical analysis shows that the variant selection of SIMT is governed by Schmid’s ***,the SIMTedε-phase did not form equally on the two sides of the annealing twins,even though they had the same Schmid *** phenomenon is related to the mechanical work developed by the formation of theε-*** the side which has both high Schmid factor and high mechanical work can initiate the SIMT process.A strongfiber texture was formed,and theε-variants tended to appear in grains with orientations close to theanddirections during the tensile *** results can provide theoretical guidance for controlling the SIMT process of Co-Cr-W-Ni alloys to fabricate more reliable stents.

关键词： Biomedical Co-Cr-W-Ni alloys Straininduced martensitic transformation Nucleation Variant selection Orientation dependence

Towards a one-stop solution for large-scale proteomics data analysis

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Science China(Life Sciences) 2018年第3期61卷 351-354页

作者： yi zhu Tiannan Guo Institute of Basic Medical Sciences Westlake Institute for Advanced Study Hangzhou 310024 China Westlake University Hangzhou 310024 China

When China started to push for proteome research in 2010, Dr. John Bergeron from McGill University had just final- ized with colleagues a report from a Human Proteome Or- ganization （HUPO） test sample working group, which had sent an equimolar mixture of 20 highly purified proteins to 27 proteomics laboratories around the world, and asked the proteomists the question： What proteins can you identify with your mass spectrometers （Bell et al., 2009）？ Surpris- ingly, results showed that only seven out of the 27 laborato- ries identified this simple protein mixture correctly. How- ever, after John and colleagues re-analyzed the mass spec- trometry data using their standardized software tools, they found that all the 27 laboratories had correctly identified all the proteins （Bell et al., 2009）. Therefore, he warned the enthusiastic Chinese proteomists in an interview, ＂data analysis is the heart of proteomics＂（Cyranoski, 2010）.

关键词： proteomics 数据分析 proteome Proteome 蛋白质期末考试高度净化软件工具

Variable Selection for the Partial Linear Single-Index Model

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Acta Mathematicae Applicatae Sinica 2017年第2期33卷 373-388页

作者： Wu WANG Zhong-yi zhu Department of Statistics School of Management Fudan University Shanghai 200433 China

In this paper, we consider the issue of variable selection in partial linear single-index models under the assumption that the vector of regression coefficients is sparse. We apply penalized spline to estimate the nonparametric function and SCAD penalty to achieve sparse estimates of regression parameters in both the linear and single-index parts of the model. Under some mild conditions, it is shown that the penalized estimators have oracle property, in the sense that it is asymptotically normal with the same mean and covariance that they would have if zero coefficients are known in advance. Our model owns a least square representation, therefore standard least square programming algorithms can be implemented without extra programming efforts. In the meantime, parametric estimation, variable selection and nonparametric estimation can be realized in one step, which incredibly increases computational stability. The finite sample performance of the penalized estimators is evaluated through Monte Carlo studies and illustrated with a real data set.

关键词： nonparametric link function SCAD penalty semiparametric model spline estimation variable selection

Synthesis, Electrochemistry, Fluorescence and ECL of Ru （phen）₂ （dcbpy）（PF₆）₂

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Chinese Chemical Letters 1999年第3期10卷 255-256页

作者： Wang, Peng Yuan, yi zhu, Guo yi Lab. of Electroanalytical Chemistry Changchun Inst. of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China

A new ECL-active species. Ru (phen)_2 (dcbpy) (PF_6)_2. has been designed andsynthesized. its structure was confirmed by means of IR. ESI-MS and 2D NMR. Also. itsproperties of electrochemistry. fluorescence and ECL are reported. which have suggested a goodhope of being used in electrochemiluminescent immunoassay and nucleic acid hybridization.

关键词： Ru (phen)_2 (dcbpy) (PF_6)_2 electrochernistry fluorescence electrochemiluminescence