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Microstructure,microchemistry,and micro-magnetism of dysprosium grain boundary diffused(Nd,Ce)-Fe-B magnets

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Journal of Rare Earths 2025年第3期 556-568页

作者： Yifei Xiao Lele Zhang Tao Liu Qisong Sun Xiaolong Song Yikun Fang Anhua Li Minggang zhu Wei Li Division of Functional Materials Central Iron and Steel Research Institute Key Laboratory of Advanced Functional Materials Ministry of Education of ChinaCollege of Materials Science and EngineeringBeijing University of Technology

The microstructure of（Nd,Ce）-Fe-B sintered magnets with different diffusion depths was characterized by a magnetic force microscope,and the relationship between the magnetic properties and the local structure of grain boundary diffused magnets is *** domains perpendicular to the c-axis（easy magnetization direction） show a typical maze-like pattern,while those parallel to the c-axis show the characte ristics of plate *** significant gradient change is shown in the concentration of Dy with the direction of diffusion from the surface to the *** diffuses along grain boundaries and（Dy,Nd）2Fe14B layer with a high anisotropy field formed around the *** in-situ electron probe micro-analysis/magnetic force microscopy（EPMA/MFM）,it is found that the average domain width decreases,and the proportion of single domain grains increases as diffusion depth *** is caused by both the change of concentration and distribution of *** grain boundary diffusion process changes the microstructure and microchemistry inside the magnet,and these local magnetism differences can be reflected by the configuration of the magnetic domain structure.

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Fabrication of porous scaffolds with protein nanogels

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Science China Chemistry 2011年第6期54卷 961-967页

作者： zhu Qi YAN Ming HE Lin zhu XinYuan LU YunFeng YAN DeYue State Key Laboratory of Metal Matrix Composites: School of Chemistry and Chemical Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Chemical & Biomolecular Engineering University of California Los Angeles 90055 USA Instrumental Analysis Center Shanghai Jiao Tong University Shanghai 200240 China

A novel type of porous scaffold was fabricated from single protein nanogels. The nanogels with single protein as core and crosslinked polymer network as shell were prepared through a two-step procedure including surface acryloylation and in situ radical polymerization. The formation of single protein nanogels was verified by matrix assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometer, transmission electron microscopy (TEM) and dynamic light scattering (DLS) analyses. Subsequently, the porous scaffolds were fabricated through a solvent evaporating process of aqueous nanogel solutions. The porous scaffolds were characterized by Fourier transform infrared (FTIR), scanning electronic microscopy (SEM), atomic force microscopy (AFM), and fluorescence microscopy. Interestingly, the obtained porous nanogel scaffolds presented multi-level porous morphologies with macro and nano scale pores, providing better spaces and microenvironments than normal macro porous scaffolds. Cell proliferation assay of nanogels showed low cytotoxicity. Considering that both the protein species and polymer constitutes can be pre-designed and adjusted, these multi-level porous nanogel scaffolds are promising candidates for tissue culture applications.

关键词： protein nanogel porous scaffold tissue culture

Phenyl iodonium bis(perfluoroalkanesulphonyl)-methide-dimethyl sulphoxide complex——Its formation and X-ray structure analysis

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Chinese Journal of Chemistry 1992年第5期10卷 458-463页

作者： zhu, Shi-Zheng CHEN, qing-Yun zhu, Yu-Hua WU, Kuang Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032 Analysis and Measurement Center, Fudan University, 220 Handan Lu, Shanghai 200433 Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Lu Shanghal 200032 Analysis and Measurement Center Fudan University 220 Handan Lu Shanghai 200433

Irradiation of phenyl iodonium bis(perfluoroalkanesulphonyl)methide in DMSO yields an 1:1 adduct, DMSO·PhI=C(SO_2R_F)_2 (2) which was confirmed by X-ray crystal structure analysis.

关键词： Phenyl iodonium bis perfluoroalkanesulphonyl Its formation and X-ray structure analysis methide-dimethyl sulphoxide complex DMSO 亚砜

Ordered proposition fusion based on consistency and uncertainty measurements

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Science China(Information Sciences) 2017年第8期60卷 117-135页

作者： Dayou LIU Yungang zhu Ni NI Jie LIU College of Computer Science and Technology Jilin University Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Beijing Entry-Exit Inspection and Quarantine Bureau

The fusion of ordered propositions is an important and widespread problem in artificial intelligence,but existing fusion methods have difficulty handling the fusion of ordered propositions. In this paper, we propose a solution based on consistency and uncertainty measurements. The main contributions of this paper are as follows. First, we propose the concept of convexity degree, mean, and center of basic support function to comprehensively describe the basic support function of ordered propositions. Second, we introduce entropy as a measure of uncertainty in the basic support function of ordered propositions. Third, we generalize the indeterminacy of the basic support function and propose a novel method to measure the consistency between two basic support functions. Finally, based on the above researches, we propose a novel algorithm for fusing ordered propositions. Theoretical analysis and experimental results demonstrate that the proposed method outperforms state-of-the-art methods.

关键词： uncertainty processing ordered proposition evidence theory dempster rule of combination information fusion

Homoclinic and Periodic Orbits Arising Near the Heteroclinic Cycle Connecting Saddle-focus and Saddle Under Reversible Condition

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Acta Mathematica Sinica,English Series 2007年第8期23卷 1495-1504页

作者： De Ming zhu Ying SUN Department of Mathematics East China Normal University Shanghai 200062 P. R. China School of Science University of Ji'nan Ji'nan 250022 P. R. China

In this paper, we study the dynamical behavior for a 4-dimensional reversible system near its heteroclinic loop connecting a saddle-focus and a saddle. The existence of infinitely many reversible 1-homoclinic orbits to the saddle and 2-homoclinic orbits to the saddle-focus is shown. And it is also proved that, corresponding to each 1-homoclinic （resp. 2-homoclinic） orbit F, there is a spiral segment such that the associated orbits starting from the segment are all reversible 1-periodic （resp. 2-periodic） and accumulate onto F. Moreover, each 2-homoclinic orbit may be also accumulated by a sequence of reversible 4-homoclinic orbits.

关键词： reversible condition homoclinic orbit Poincare map periodic orbit saddle-focus

添加剂对水玻璃砂溃散性及铸铁件粘砂缺陷的影响

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铸造 2014年第4期63卷 396-400页

作者：朱青朱世根骆祎岚东华大学机械工程学院纺织装备教育部工程研究中心上海201620

针对CO2水玻璃砂溃散性差、铸件清砂困难以及铸铁件粘砂严重等问题,论述了改善CO2水玻璃砂溃散性和产生粘砂缺陷的机理,研制了添加剂和相应的吹气工艺。结果表明:在水玻璃砂中加入添加剂后,型砂溃散性明显提高,且其残留强度曲线的"双峰... 详细信息

针对CO2水玻璃砂溃散性差、铸件清砂困难以及铸铁件粘砂严重等问题,论述了改善CO2水玻璃砂溃散性和产生粘砂缺陷的机理,研制了添加剂和相应的吹气工艺。结果表明:在水玻璃砂中加入添加剂后,型砂溃散性明显提高,且其残留强度曲线的"双峰"特征消失,出现一致下降的趋势;在铸造过程中,还可以显著减小铸型表面孔隙,使铸型与铸件间的界面层在高温下发生适度烧结和致密化,有利于防止金属液的渗透,防止铸铁件产生粘砂缺陷。

关键词：添加剂水玻璃砂溃散性粘砂

Complementary two-phase anode improving stability and conductivity for lithium storage performance

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Rare Metals 2023年第1期42卷 85-99页

作者： Xue-Fang Xie Guo-Zhao Fang Ying-zhu Hu Xin-Xin Cao Ting zhu An-Qiang Pan School of Materials Science&Engineering Central South UniversityChangsha410083China

Metal chalcogenides with multiple lithium ions storage capability have received extensive attentions in recent years;however,their practical application is restricted by the structural instability and poor ***,a unique structure of N and S co-doped C/TiO_(2)nanofibers is reported to support SnS nanosheets for fast and ultra-stable lithium *** incorporation of TiO_(2)can notably suppress the excessive uncontrollable growth of SnS and improve the structural stability of the electrode *** effects of the ratios between Ti and Sn and the corresponding synthesis temperatures on the structure and electrochemical properties of the electrodes have been systematically *** interface charge transfer behavior of SnS and TiO_(2)composite heterostructure was clarified by density functional theory(DFT)*** electronic interaction SnS and TiO_(2)can effectively reduce the energy band gap and form a built-in electric field at the interface of the two *** is beneficial for the adsorption of lithium ion and consequently accelerate the reaction kinetics of the electrode *** the two phases are combined,the agglomeration of SnS is effectively suppressed,and the overall conductivity of the composite is greatly ***,the synergistic effect induced by SnS and TiO_(2)enables the good stability of the electrode in both lithium-ion half-cells and full *** work can provide new insights toward improving the performance of alloy-type anodes.

关键词： SnS TiO_(2) Structural stability Battery

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6G网络中分布式AI模型协同技术综述

移动通信 2025年第1期49卷 43-51页

作者：张秀贤朱晓荣南京晓庄学院电子工程学院江苏南京211171 南京邮电大学通信与信息工程学院江苏南京210003

分布式网络人工智能模型协同技术是分布式数据安全流通的底层支撑,是实现6G网络智慧内生的关键技术。对6G网络中的模型协同技术进行了全面的综述。回顾了中心侧大模型中,数据并行、模型并行及混合并行等模型协同技术。面对边缘智能中边... 详细信息

分布式网络人工智能模型协同技术是分布式数据安全流通的底层支撑,是实现6G网络智慧内生的关键技术。对6G网络中的模型协同技术进行了全面的综述。回顾了中心侧大模型中,数据并行、模型并行及混合并行等模型协同技术。面对边缘智能中边缘节点算力及内存不足、通信带宽受限的问题,从拆分学习、联邦学习、拆分联邦学习、分布式群体学习等几个方面探讨总结了边缘智能的模型协同技术。最后,强调了在6G网络中,为了不重复训练相似的大模型,需要大小模型协同进化。

关键词：分布式AI 6G 模型协同大模型

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一种应用在多孔径宽测绘带SAR中的CS算法

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电子与信息学报 2005年第12期27卷 1861-1866页

作者：王小青朱敏慧盛新庆中国科学院电子学研究所微波成像技术国家重点实验室

多孔径接收宽测绘带SAR方法是一种较先进的高精度宽测绘带SAR成像方法。这种方法要求先对距离向信号压缩然后用反解矩阵求出各个测绘带的信号，然后再进行方位向聚焦。RD算法应用在这种成像方法比较方便，但是在星载SAR成像中大多用精... 详细信息

多孔径接收宽测绘带SAR方法是一种较先进的高精度宽测绘带SAR成像方法。这种方法要求先对距离向信号压缩然后用反解矩阵求出各个测绘带的信号，然后再进行方位向聚焦。RD算法应用在这种成像方法比较方便，但是在星载SAR成像中大多用精度较高、运算量较小的CS算法。CS算法要求先进行方位向FFT而不是距离向压缩，所以不能直接应用在这种成像方法中。该文提出了一种基于CS算法的多孔径成像算法，可以很方便应用于多孔径接收宽测绘带SAR，并进行了计算量和误差分析，给出了仿真结果。仿真结果证实了本文所述方法的有效性。

关键词： SAR 宽测绘带 cs算法多孔径成像算法