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Improved Electrochemical Performance Based on Nanostructured SnS_2@CoS_2–rGO Composite Anode for Sodium-Ion Batteries

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Nano-Micro Letters 2018年第3期10卷 91-102页

作者： Xia Wang Xueying li Qiang li Hongsen li Jie Xu Hong Wang Guoxia Zhao lisha Lu Xiaoyu lin Hongliang li shandong li College of Physics Key Laboratory of Photonics Materials and Technology in Universities of Shandong and Laboratory of Fiber Materials and Modern Textile the Growing Base for State Key Laboratory Qingdao University Institute of Materials for Energy and Environment Qingdao University

A promising anode material composed of SnS_2@CoS_2 flower-like spheres assembled from SnS_2 nanosheets and CoS_2 nanoparticles accompanied by reduced graphene oxide(rGO) was fabricated by a facile hydrothermal pathway. The presence of rGO and the combined merits of SnS_2 and CoS_2 endow the SnS_2@-CoS_2–rGO composite with high conductivity pathways and channels for electrons and with excellent properties as an anode material for sodium-ion batteries(SIBs). A high capacity of 514.0 mAh g^(-1) at a current density of200 m A g^(-1) after 100 cycles and a good rate capability can be delivered. The defined structure and good sodium-storage performance of the SnS_2@CoS_2–rGO composite demonstrate its promising application in high-performance SIBs.

关键词： SnS2 nanosheets CoS2 nanoparticles Reduced graphene oxide(rGO) Sodium-ion batteries(SIBs)

Effect of interface magnetization depinning on the frequency shift of ferromagnetic and spin wave resonance in YIG/GGG films

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Chinese Physics B 2020年第6期29卷 499-504页

作者： Fanqing lin Shouheng Zhang Guoxia Zhao Hongfei li Weihua Zong shandong li College of Physics Center for Marine Observation and CommunicationsQingdao UniversityQingdao 266071China School of Electronics and Information Qingdao UniversityQingdao 266071China

Nowadays the yttrium iron garnet(Y3Fe5O12, YIG) films are widely used in the microwave and spin wave devices due to their low damping constant and long propagation distance for spin waves. However, the performances, especially the frequency stability, are seriously affected by the relaxation of the interface magnetic moments. In this study, the effect of out-of-plane magnetization depinning on the resonance frequency shift(△ fr) was investigated for 3-μm YIG films grown on Gd3Ga5O12(GGG)(111) substrates by liquid-phase epitaxy. It is revealed that the ferromagnetic resonance(FMR) and spin wave propagation exhibit a very slow relaxation with relaxation time τ even longer than one hour under an out-of-plane external magnetic bias field. The △ fr span of 15.15–24.70 MHz is observed in out-of-plane FMR and forward volume spin waves. Moreover, the △ fr and τ depend on the magnetic field. The △ fr can be attributed to that the magnetic moments break away from the pinning layer at the YIG/GGG interface. The thickness of the pinning layer is estimated to be about9.48 nm to 15.46 nm according to the frequency shifting. These results indicate that △ fr caused by the pinning layer should be addressed in the design of microwave and spin wave devices, especially in the transverse magnetic components.

关键词： yttrium iron garnet(YIG) magnetization relaxation ferromagnetic resonance spin waves

Improvement of high-frequency properties of Co2FeSi Heusler films by ultrathin Ru underlayer

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Chinese Physics B 2020年第4期29卷 379-384页

作者： Cuiling Wang Shouheng Zhang shandong li Honglei Du Guoxia Zhao Derang Cao College of Physics Center for Marine Observation and CommunicationQingdao UniversityQingdao 266071China College of Electronic and Information Engineering Shandong University of Science and TechnologyQingdao 266510China School of Physics Shandong UniversityJinan 250100China

Heusler Co2FeSi films with a uniaxial magnetic anisotropy and high ferromagnetic resonance frequency fr were deposited by an oblique sputtering technique on Ru underlayers with various thicknesses tRufrom 0 nm to 5 *** is revealed that the Ru underlayers reduce the grain size of Co2FeSi,dramatically enhance the magnetic anisotropy field HK induced by the internal stress from 242 Oe(1 Oe=79.5775 A·m^-1)to 582 Oe with an increment ratio of 2.4,while a low damping coefficient *** result of damping implies that the continuous interface between Ru and Co2FeSi induces a large in-plane anisotropic field without introducing additional external *** a result,excellent high-frequency soft magnetic properties with fr up to 6.69 GHz are achieved.

关键词： oblique sputtering ferromagnetic resonance Ru underlayer Heusler thin film

TWO CLASSES OF INTEGRABLE COUPliNG FOR AKNS HIERARCHY

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Annals of Differential Equations 2009年第4期25卷 495-501页

作者： Wencai Zhao (College of Science, shandong University of Science and Technology, Qingdao 266510, shandong) ling li (College of Information Science and Engineering, shandong University of Science and Technology, Qingdao 266510, shandong)

A set of new matrix lie algebra is constructed, which is devoted to obtaining a new loop algebra A 2M . Then we use the idea of enlarging spectral problems to make an enlarged spectral problems. It follows that the multi-component AKNS hierarchy is presented. Further, two classes of integrable coupling of the AKNS hierarchy are obtained by enlarging spectral problems.

关键词： integrable coupling AKNS hierarchy matrix loop algebra

A REVIEW ON MUSIC SOURCE SEPARATION

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A REVIEW ON MUSIC SOURCE SEPARATION

Attampt to Use English Teaching about Neuroscience for 7 Years Medical Students

2009 IEEE Youth Conference on Information,Computing and Telecommunication(YC-ICT2009)

作者： Ruolun liu, Suping li shandong University at Weihai, Weihai, shandong, China

Music source separation is relevant to many applications including automatic music transcription, remixing in studio, content related music indexing etc. Though source separation has been discussed for decades, there is no systematic summarization focuses on music source separation. Different methods and techniques have been proposed from the different point of views based on the researcher's own specialties. With certain advantages and limitations, they are scattering over different conference proceedings, journals of different subjects, reports, dissertations, and chapter of books. One purpose of this work is to collect them together in one place, thus facilitating the future research on this fascinating topic. The other one is to point out the possible directions of future research.

关键词： Music source separation, CASA, BSS

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Attampt to Use English Teaching about Neuroscience for 7 Yea...

SIMULATION OF 3-D FLOW AROUND A VAN-BODY TRUCK WITH RNG K-ε TURBULENCE MODEL

山东解剖学会教学研讨会

作者： Zhenzhong li (shandong University School of Medicine, Jinan 200012)

＜正＞ Neuroscience is one of the most rapidly advancing areas of science and, as a consequence, spawns aliterature which is growing dramatically. At one level it attampts to provide a mechanistic amount of the most complex ’device’ in the known Universe, the human brain. Moreover, neuroscience is multidisciplinary, having contributions from biochemistry and molecular biology, physiology, anatomy, psychology and clinical medicine, to name the most obvious. For these reasons, it is becoming increasingly difficult for lecturers and textbook authors to present neuroscience in a way that manages to be comprehensive, up-to-date and accessible, while still being sufficiently rigorous to prepare students to be succeccful explorers of the literature for themselves.

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Journal of Hydrodynamics 2001年第4期13卷 98-101页

作者： Du, Guang-Sheng Wang, De-Chang Lei, li Zhou, lian-Di Coll. of Water Conservancy Wuhan Univ. Ji'nan 250061 China

It is proved that the calculation precision of the outside flow field of the van-body truck using PNG k-Ε turbulence model is higher than that using standard k-Ε turbulence model by means of experiments. The calculation results of the outside flow field of a certain domestic van-body truck are given. And by analyzing and comparing the different tail flow plots, the tail flow structural characteristics and the relationship between the position and the intensity of the tail vortex and the aerodynamic drag is obtained, which can direct the design of the outside aerodynamic shape of the van-body truck.

关键词： Computer simulation Drag Mathematical models Turbulent flow

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浅谈图书馆员与读者的人际关系

图书馆论坛 2004年第5期24卷 208-209页

作者：陶莉山东大学图书馆山东济南250100

馆员在与读者的接触与服务中 ,经常会出现一些意想不到的尴尬事 ,大多与二者之间的关系有着不可分割的联系 ,如何改善这种局面。

关键词：图书馆馆员读者服务人际关系期刊丢失率

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企业与企业法的概念分析

山东大学学报（哲学社会科学版） 2001年第6期 75-82页

作者：董学立山东大学威海分校法律系山东威海264209

企业和企业法是形式企业法的上位概念 ,它们在使用上常被弄得模糊不清。企业有经济学和法律学双重含义 ,经济学关注企业的经济效率 ,法律学关怀财产的交易安全。企业法有广义的企业法与狭义的企业法 ,广义的企业法由企业介入社会的广度... 详细信息

企业和企业法是形式企业法的上位概念 ,它们在使用上常被弄得模糊不清。企业有经济学和法律学双重含义 ,经济学关注企业的经济效率 ,法律学关怀财产的交易安全。企业法有广义的企业法与狭义的企业法 ,广义的企业法由企业介入社会的广度和深度来决定 ,狭义的企业法即商事组织法。作为商法领域的上位概念 ,企业与企业法是对商事组织法的抽象、概括。

关键词：企业企业法定义经济效率经济学法律学商事组织法法律特征