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A Dynamic Increamental Hysteresis model Incorporating Eddy Current Losses for Giant magnetostrictive materials

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A Dynamic Increamental Hysteresis Model Incorporating Eddy C...

Structural, morphological, dielectrical and magnetic properties of mn substituted cobalt ferrite

The 16th Annual Conference of Hong Kong Society of Theoretical and Applied mechanics 2012、The 1st mainland-Hong Kong youth Forum on mechanics 2012、The 8th Shanghai-Hong Kong Forum on mechanics and Its Application 2012

作者： y.m.Pei H.Xu D.N.fang LTCS College of EngineeringPeking University

This paper addresses the deveolopment of a magneto-elastic coupling dynamic hysteresis model for giant magnetostrictive materials(Gmms).Firstly,a three-dimensional domain rotation mechanism is introduced to investigate how the magnetization and magnetostriction of Gmms change with stresses and applied magnetic *** eddy current effects are incorporated to predict the dynamic hystersis behaviour of *** study reveals that eddy current losses lead to increaseing magnetic hysteresis as the frequency *** model is validated by comparing the predicted results with experiment ***,the model is convenient to be used in engineering applications since the parameters referred to the model have definite physical meaning and can be easily determined by experiments.

关键词： model A Dynamic Increamental Hysteresis model Incorporating Eddy Current Losses for Giant magnetostrictive materials

来源： cnki会议评论

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Journal of Semiconductors 2013年第9期34卷 16-20页

作者： S.P.yadav S.S.Shinde A.A.Kadam K.y.Rajpure Karmveer Bhaurao Patil College VashiNavi Mumbai Maharashtra-400703India Electrochemical materials Laboratory Department of PhysicsShivaji UniversityKolhapur Maharashtra-416004India Smt.Kashibai Navale College of Engineering Wadgaon BkPune Maharashtra-411041 India

The C01-xmnxFez04 （0 ≤ x 〈-5 0.5） ferrite system is synthesized by using an auto combustion technique using metal nitrates. The influence of mn substitution on the structural, electrical, impedance and magnetic properties of cobalt ferrite is reported. X-ray diffraction patterns of the prepared samples confirm that the Bragg＇s peak belongs to a spinel cubic crystal structure. The lattice constant of cobalt ferrite increases with the increase in mn content. The microstructural study is carried out by using the SEm technique and the average grain size continues to increase with increasing manganese content. AC conductivity analysis suggests that the conduction is due to small polaron hopping. DC electrical resistivity decreases with increasing temperature for a Col-xmnxFe204 system showing semiconducting behavior. The activation energy is found to be higher in the paramagnetic region than the ferromagnetic region. Curie temperature decreases with mn substitution in the host ferrite system. Dielectric dispersion having maxwell-Wagner-type interfacial polarization has been observed for cobalt ferrite samples. magnetic properties have been studied by measuring m-H plots. The saturation and remanent magnetization increases with mn substitution.

关键词： combustion mn substitution structural dielectric magnetic

Effect of microwave Heating on Infrared Radiation Properties of Cordierite-Ferrites Based Composite Ceramics

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Journal of the Chinese Ceramic Society 2015年第1期 38-43页

作者： LU Lei fan Xi'an HU Xiaoming ZHANG Jianyi The State Key Laboratory of Refractories and metallurgy Wuhan University of Science and Technology Key Laboratory for Ferrous metallurgy and Resources Utilization of ministry of Education Wuhan University of Science and Technology Suzhou Sagreon New materials Co. LTD.

The cordierite-ferrites based infrared radiation composite materials were synthesized with Fe2O3, mn O2, Cu O, Co2O3, and mg2Al4Si5O18 powders as raw materials via microwave heating. The cordierite-ferrites based composite ceramics could be obtained via microwave heating at 1173 K for 1 h or 1473 K for 10 min, respectively. The lower synthesis temperature or the shorter heating time results in the smaller grain size of the composite ceramics obtained by microwave heating. The interplanar distance of cordierite becomes greater after microwave heating, indicating that the doping effect of transitional metal oxides on the cordierite is more efficient in microwave heating. The infrared radiation composite ceramics synthesized by microwave heating at 1473 K for 1 h exhibit the maximum emissivity of 0.9 in the band range of 6-8 μm at 1073 K.

关键词： infrared emissivity spinel cordierite microwave heating energy-saving

疫情防控常态化背景下医学院校课程思政整体性建设探析

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中国医学伦理学 2022年第1期35卷 117-122页

作者：于帆福建医科大学马克思主义学院福建福州350001

医学院校课程思政整体性建设的根本任务是立德树人,其整体性建设要求全部医学院校、全部医学专业、全部医学课程、全部教学环节全面推进落实,同时医学院校课程思政建设要处理好课程思政内涵展现、课程思政与思政课程的定位、课程思政的... 详细信息

医学院校课程思政整体性建设的根本任务是立德树人,其整体性建设要求全部医学院校、全部医学专业、全部医学课程、全部教学环节全面推进落实,同时医学院校课程思政建设要处理好课程思政内涵展现、课程思政与思政课程的定位、课程思政的专业性和思政性建设、本科生与研究生一体化建设等问题,从组织领导保障、评价机制体系、课程分类重点、课程教学实际及教师人才队伍入手改进和加强课程思政整体性建设。

关键词：医学院校课程思政整体性

维普期刊数据库博看期刊

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辩护律师忠诚义务的三种模式

当代法学 2021年第3期35卷 112-124页

作者：刘译矾中国政法大学刑事司法学院

作为辩护律师的首要职业伦理,忠诚义务是指辩护律师既要维护当事人的利益,又要尊重当事人的意志。在比较法的视野下,美国、德国和日本律师职业伦理中呈现出三种不同的忠诚义务模式,分别是"完全的忠诚义务"模式、"不完全的忠诚义务"模式... 详细信息

作为辩护律师的首要职业伦理,忠诚义务是指辩护律师既要维护当事人的利益,又要尊重当事人的意志。在比较法的视野下,美国、德国和日本律师职业伦理中呈现出三种不同的忠诚义务模式,分别是"完全的忠诚义务"模式、"不完全的忠诚义务"模式和"混合的忠诚义务"模式。在这三种模式下,律师在辩护权的行使、利益冲突的处理、退出辩护的自由以及执业行为的边界上呈现出不同的特征。这三种模式的形成与律师的身份定位、刑事诉讼模式、律师职业发展传统以及法律人才的培养方式等因素存在紧密联系。在辩护律师忠诚义务亟待重塑的我国,有必要汲取域外经验,在我国引入一种"受限的忠诚义务"模式,一方面强调律师要在法律不禁止的范围内承担积极的维护利益义务和消极的尊重意志义务,另一方面也要求律师承担有限的公益义务。

关键词：完全的忠诚义务不完全的忠诚义务混合的忠诚义务受限的忠诚义务公益义务律师职业伦理

^(169)Re的转动带结构组态相关性研究(英文)

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高能物理与核物理 2003年第11期27卷 984-989页

作者：周小红 m. Oshima 许甫荣 y. Toh 张玉虎郑勇 m. Koizumi A. Osa T. Hayakawa y. Hatsukawa T. Shizuma m. Sugawara 中国科学院近代物理研究所兰州730000 Japan 北京大学技术物理系和mOE重点实验室北京100871 Chiba

研究了^(169)Re的高自旋态能级结构,建立了组态为π9/2^-[514]的强耦合带和组态为π1/2^-[541]的退耦合带,推转壳模型(Cranked shell model)计算结果表明组态相关的不同形变能够解释这些转动带的不同带交叉频率,在已知的奇ARe核中,^(169... 详细信息

研究了^(169)Re的高自旋态能级结构,建立了组态为π9/2^-[514]的强耦合带和组态为π1/2^-[541]的退耦合带,推转壳模型(Cranked shell model)计算结果表明组态相关的不同形变能够解释这些转动带的不同带交叉频率,在已知的奇ARe核中,^(169)Re的9/2^-[514]转动带在低自旋时具有最大的能量旋称劈裂,当一对i_(13/2)中子顺排后,旋称劈裂发生了反转,并且劈裂的幅度非常显著地减少了,另外,还观测到了一个三准粒子激发带,并指定了它的最可能组态为π9/2^-[514](?)νAE。

关键词： ^169Re 高自旋态能级结构转动带结构组态相关性强耦合带推转壳模型铼原子核

meV-and Sub-meV-photon Sources Based on Compton Backscattering at SPring-8 and KPSI-JAEA

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原子核物理评论 2009年第S1期26卷 94-99页

作者： K.Kawase m.Kando T.Hayakawa I.Daito S.Kondo T.Homma T.Kameshima H.Kotaki y.Fukuda A.Faenov T.Shizuma S.V.Bulanov T.Kimura T.Tajima m.Shoji S.Suzuki K.Tamura H.Ohkuma y.Arimoto T.yorita m.Fujiwara S.Okajima Kansai Photon Science Institute Japan Atomic Energy Agency Japan Synchrotron Radiation Research Institute Department of Physics Osaka University Research Center for Nuclear Physics Osaka University

Recently we have constructed two facilities for generating photon beams in the meV and sub-meV energy regions by means of the Compton backscattering with a laser and an electron beam at SPring-8 and at Kansai Photon Science Institute of Japan Atomic Energy Agency(KPSI-JAEA). The meV-photon source at SPring-8 consists of a continuous-wave optically-pumped far infrared laser with a wavelength of 118.8 μm and an 8 GeV stored electron beam. Present meV-photon flux is estimated to be 1.3×103 photons/s. On the other hand,the sub-meV-photon source at KPSI-JAEA consists of a pulse Nd∶yAG laser with a wavelength of 1 064 nm and a 150 meV electron beam accelerated by microtron. In the first trial of the photon production in this source,backscattered photon flux is estimated to be 20 photons/pulse. Both the Compton backscattered photon sources have possibilities to be used for new tools in various fields such as nuclear physics,materials science,and astronomy.

关键词： laser Compton backscattering polarized γ-ray polarized X-ray

Femtosecond laser-induced damage threshold in snow micro-structured targets

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High Power Laser Science and Engineering 2018年第1期6卷 38-43页

作者： O.Shavit y.Ferber J.Papeer E.Schleifer m.Botton A.Zigler Z.Henis Racah Institute of Physics Hebrew University

Enhanced acceleration of protons to high energy by relatively modest high power ultra-short laser pulses, interacting with snow micro-structured targets was recently proposed. A notably increased proton energy was attributed to a combination of several mechanisms such as localized enhancement of the laser field intensity near the tip of 1 μm size whisker and increase in the hot electron concentration near the tip. moreover, the use of mass-limited target prevents undesirable spread of absorbed laser energy out of the interaction zone. With increasing laser intensity a Coulomb explosion of the positively charged whisker will occur. All these mechanisms are functions of the local density profile and strongly depend on the laser pre-pulse structure. To clarify the effect of the pre-pulse on the state of the snow micro-structured target at the time of interaction with the main pulse, we measured the optical damage threshold(ODT) of the snow targets. ODT of 0.4 J/cm^2 was measured by irradiating snow micro-structured targets with 50 fs duration pulses of Ti:Sapphire laser.

关键词： high intensity laser ion acceleration optical damage threshold

28Crmo钢表面磁控溅射TiN涂层的组织结构及耐腐蚀性能

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材料保护 2017年第5期50卷 9-11,32页

作者：吴凡重庆水利电力职业技术学院重庆402160

为了提高28Crmo钢表面的致密性和耐腐蚀性能,采用磁控溅射技术在28Crmo钢表面制备TiN涂层,通过光学显微镜、X射线衍射仪(XRD)、电化学测试等手段分析了TiN涂层的显微结构及其在3.5%NaCl溶液中的耐腐蚀性能。结果表明:采用磁控溅射技术在... 详细信息

为了提高28Crmo钢表面的致密性和耐腐蚀性能,采用磁控溅射技术在28Crmo钢表面制备TiN涂层,通过光学显微镜、X射线衍射仪(XRD)、电化学测试等手段分析了TiN涂层的显微结构及其在3.5%NaCl溶液中的耐腐蚀性能。结果表明:采用磁控溅射技术在28Crmo钢表面制备了厚约0.5μm的TiN涂层,涂层与基体结合良好,没有出现明显的裂纹,涂层表面N的原子分数明显高于Ti;电化学Nyquist谱得到高频区的容抗弧可能是由电荷转移电阻引起和膜层引起,中频区的容抗弧由基体金属溶解时的传质弛豫引起,低频区的感抗弧由基体表面吸附物的弛豫过程引起;3.5%NaCl溶液中腐蚀96 h后TiN涂层表面有蚀坑,吸附有白色疏松的腐蚀产物,并出现大小不一的腐蚀坑;TiN涂层能够明显改善基体的耐蚀性能,对改进高铬钢表面特性具有重要的作用。

关键词：磁控溅射 28Crmo钢 TiN涂层显微组织耐腐蚀性能