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上海交通大学学报 2003年第12期37卷 1831-1834,1839页

作者：张斌张鸿冰宝钢集团上海第一钢铁有限公司技术中心上海200431 上海应用技术学院材料科学工程系上海200052

基于相变动力学和热力学原理,并根据Schieil叠加原理和热膨胀实验结果,建立了形变奥氏体(γ)→铁素体(α)连续冷却相变动力学行为的预测模型,将其应用于形变奥氏体后的控制冷却过程,可以计算出铁素体相变开始温度以及室温组织中的体积... 详细信息

基于相变动力学和热力学原理,并根据Schieil叠加原理和热膨胀实验结果,建立了形变奥氏体(γ)→铁素体(α)连续冷却相变动力学行为的预测模型,将其应用于形变奥氏体后的控制冷却过程,可以计算出铁素体相变开始温度以及室温组织中的体积分数等参数.该方法的计算模拟结果与实测结果吻合很好,表明这种理论的计算方法是可行的.

关键词：相变动力学奥氏体铁素体体积分数相变开始温度

Is There a Link Between Emission-Line Widths and X-Ray Continuum Slopes in Narrow Line Seyfert 1.Galaxies?

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天文研究与技术 1999年第S1期 315-318页

作者： Xu D.W. 1.2 1.(Beijing Astronomical Observatory, The Chinese Academy of Sciences, Beijing 1.001., China) 2 (National Astronomical Observatories, The Chinese Academy of Sciences, Beijing 1.001.,China) Email: dwxu @ class 1. bao. ac. cn

We present the discovery of 1. narrow line Seyfert 1.galaxies (NLS1.. The optical spectra show the Balmer lines only slightly broader than the forbidden lines and contain strong Fe Ⅱ emission. No particularly soft X ... 详细信息

关键词： Continuum Slopes in Narrow Line Seyfert 1.Galaxies Is There a Link Between Emission-Line Widths and X-Ray

Protein acetylation sites with complex-valued polynomial model

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Frontiers of Computer Science 2024年第3期18卷 217-226页

作者： Wenzheng bao Bin YANG School of Information Engineering Xuzhou University of TechnologyXuzhou 221018China School of Information Science and Engineering Zaozhuang UniversityZaozhuang 277160China

Protein acetylation refers to a process of adding acetyl groups(CH3CO-)to lysine residues on protein *** one of the most commonly used protein post-translational modifications,lysine acetylation plays an important role in different *** our study,we developed a humanspecific method which uses a cascade classifier of complexvalued polynomial model(CVPM),combined with sequence and structural feature descriptors to solve the problem of imbalance between positive and negative *** gene expression programming and differential evolution are utilized to search the optimal CVPM *** also made a systematic and comprehensive analysis of the acetylation data and the prediction *** performances of our proposed method are 79.1.%in Sp,78.1.%in Sn,78.66%in ACC 78.76%in F1.and 0.5733 in MCC,which performs better than other state-of-the-art methods.

关键词： protein acetylation complex-valued polynomial model machine learning

New steelmaking process based on clean deoxidation technology

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International Journal of Minerals,Metallurgy and Materials 2024年第6期31卷 1249-1262页

作者： Zhongliang Wang Yanping bao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

After the converter steelmaking process,a considerable number of ferroalloys are needed to remove dissolved oxygen from the molten steel,but it also forms a lot of oxide inclusions that cannot be completely *** the same time,it increases the carbon emis-sions in the steel production *** years of research,our team have developed a series of clean deoxidation technologies,includ-ing carbon deoxidation,hydrogen deoxidation,and waste plastic deoxidation of molten steel to address the aforementioned *** this study,thermodynamic calculations and laboratory experiments were employed to verify that carbon and hydrogen can reduce the total oxygen content in the molten steel melt to below 5×1.^(-6) and 1.×1.^(-6),*** analysis of the deoxidation mechanisms and ef-fects of polyethylene and polypropylene was also *** addition,the applications of carbon deoxidation technology in different steels with the hot-state experiment and industrial production were discussed *** carbon deoxidation experimental results of different steels were as follows:(1.the oxygen content of bearing steel was effectively controlled at 6.3×1.^(-6) and the inclusion number density was lowered by 74.73%compared to aluminum deoxidized bearing steel;(2)the oxygen content in gear steel was reduced to 7.7×1.^(-6) and a 54.49%reduction of inclusion number density was achieved with almost no inclusions larger than 5μm from the average level of industry gear steels;(3)a total oxygen content of M2 high-speed steel was as low as 3.7×1.^(-6).In industrial production practice,car-bon deoxidation technique was applied in the final deoxidation stage for non-aluminum deoxidized bearing steel,and it yielded excellent results that the oxygen content was reduced to below 8×1.^(-6) and the oxide inclusions in the steel mainly consist of silicates,along with small amounts of spinel and calcium aluminate.

关键词： clean deoxidation carbon deoxidation hydrogen deoxidation waste plastics deoxidation

Improved mass relations of mirror nuclei

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Nuclear Science and Techniques 2024年第9期35卷 178-185页

作者： Cheng Xu Man bao Department of Physics University of Shanghai for Science and TechnologyShanghai 200093China

In this study,we revisit the previous mass relations of mirror nuclei by considering 1.N-and 1.Z-dependent terms and the shell effect across a *** root-mean-squared deviation is 66 keV for 1.6 nuclei with neutron number N≥1.,as com-pared with experimental data compiled in the AME2020 *** predicted mass excesses of 1.3 proton-rich nuclei,including 98 unknown nuclei,are tabulated in the Supplemental Material herein with competitive accuracy.

关键词： Nuclear mass Mirror nuclei Proton-rich nuclei

Development and prospects of molten steel deoxidation in steelmaking process

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International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 18-32页

作者： Zhongliang Wang Yanping bao State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

In the long traditional process of steelmaking,excess oxygen is blown into the converter,and alloying elements are used for *** inevitably results in excessive deoxidation of products remaining within the steel liquid,affecting the cleanliness of the *** the increasing requirements for steel performance,reducing the oxygen content in the steel liquid and ensuring its high cleanliness is *** more than a hundred years of development,the total oxygen content in steel has been reduced from approximately 1.0×1.^(-6)to approximately 1.×1.^(-6),and it can be controlled below 5×1.^(-6)in some steel grades.A relatively stable and mature deoxidation technology has been formed,but further reducing the oxygen content in steel is no longer significant for improving steel *** research team developed a deoxidation technology for bearing steel by optimizing the entire conventional *** technology combines silicon–manganese predeoxidation,ladle furnace diffusion deoxidation,and vacuum final *** successfully conducted industrial experiments and produced interstitial-free steel with natural decarbonization ***-aluminum deoxidation was found to control the oxygen content in bearing steel to between 4×1.^(-6) and 8×1.^(-6),altering the type of inclusions,eliminating large particle Ds-type inclusions,improving the flowability of the steel liquid,and deriving a higher fatigue *** natural decarbonization predeoxidation of interstitial-free steel reduced aluminum consumption and production costs and significantly improved the quality of cast billets.

关键词： steel deoxidation deoxidizer metallurgical equipment bearing steel IF steel

Quantitative estimation of global mean precipitation throughout the Phanerozoic era

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Science China Earth Sciences 2024年第5期67卷 1616-1624页

作者： Xiujuan bao Yongyun HU Laboratory for Climate and Ocean-Atmospheric Studies Department of Atmospheric and Oceanic SciencesSchool of PhysicsPeking UniversityBeijing 100871China

Quantitatively estimating the global mean precipitation(GMP)throughout Earth's history is crucial for enhancing our understanding of long-term climate evolution and the hydrological ***,currently there is no established methodology for estimating global mean ***,we present the first study that estimates GMP in the Phanerozoic *** relationship between GMP and global mean surface temperature(GMST)is investigated by analyzing data from 23 models in the Coupled Model Intercomparison Project phase 6(CMIP6).The result reveals consistent and significant impact of temperature on precipitation,with a sensitivity range of 2–3%K^(-1..Additionally,we propose a method for accessing latitudinal variations in precipitation caused by land area distributions and paleo-Koppen climatic *** climatic belts are determined based on geological indicators such as coals,evaporites,and glacial *** GMP is thus quantitatively estimated by combining variations in GMST,land area distributions,and paleo-koppen climatic belts,spanning from 540 Ma to the present *** quantitative GMP curve demonstrates fluctuations in GMP about 500 mm yr^(-1.,with values ranging from 948 to1.42 mm yr-1.ver the Phanerozoic *** curve aligns closely with findings derived from numerical *** presented paleoprecipitation variations facilitate a more comprehensive understanding of the interconnected geological and paleoclimatic developments.

关键词： Paleoprecipitation Paleoclimate K?ppen climatic belts Global mean precipitation Hydrological cycle

20CrMnTi结构钢热变形行为及其数学模型

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上海交通大学学报 2003年第12期37卷 1826-1830页

作者：张斌张鸿冰宝钢集团上海第一钢铁有限公司技术中心上海200431 上海应用技术学院材料科学工程系上海200052

利用Gleeble-1.00热模拟实验机研究了20CrMnTi结构钢在温度为1.23～1.43K,变形速率为0.01.5s-1.件下的热变形行为.通过奥氏体再结晶动力学回归计算了20CrMnTi的形变激活能,以及峰值应力与变形温度、应变速率之间的关系;提出采用加工... 详细信息

利用Gleeble-1.00热模拟实验机研究了20CrMnTi结构钢在温度为1.23～1.43K,变形速率为0.01.5s-1.件下的热变形行为.通过奥氏体再结晶动力学回归计算了20CrMnTi的形变激活能,以及峰值应力与变形温度、应变速率之间的关系;提出采用加工硬化率-应变(θ-ε)图可以准确地判断该钢发生动态软化的类型,并可以确定动态再结晶开始和结束以及最大软化率时所对应的应变.给出了反映该钢动态再结晶进行过程的动态再结晶状态图,以及动态再结晶开始时间和完全再结晶时间与形变温度的关系图,并回归出了20CrMnTi钢的再结晶动力学方程.

关键词：结构钢再结晶动力学最大软化率动力学方程

An isolated symmetrical 2T2R cell enabling high precision and high density for RRAM-based in-memory computing

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Science China(Information Sciences) 2024年第5期67卷 287-294页

作者： Yaotian LING Zongwei WANG Yuhang YANG Lin bao Shengyu bao Qishen WANG Yimao CAI Ru HUANG School of Integrated Circuits Beijing Advanced Innovation Center for Integrated Circuits Peking University State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and Telecommunications

In-memory computing(IMC), leveraging emerging memories, holds significant promise in overcoming memory limitations and improving energy efficiency. However, the prevailing IMC array structure based on serially connected transistors and memory cells(1.1./2T2R), along with the signed weight mapping scheme, can lead to asymmetrical weight sensing issues(AWS) due to electrical asymmetry within the1.1./2T2R structure, particularly in highly scaled cells where the transistor's resistance becomes significant. In this paper, we propose and fabricate an electrically symmetric memory cell based on a physically isolated 2T2R structure for IMC. This design aims to enhance the precision and density of RRAM-based IMC arrays. The 2T2R cells are manufactured using the back-end-of-line(BEOL) process of a commercial40 nm technology platform. The feasibility of this design is verified through measured and simulated results,showcasing its capability to address the issue of AWS. Compared to conventional 2T2R cells, this design achieves a considerably smaller transistor footprint without compromising accuracy, while also improving integration density by 42.2%. These innovative memory cell advancements have the potential to further advance high-energy-efficient IMC technology.

关键词： RRAM 2T2R multi-level storage weight asymmetry in-memory computing