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Consistency between domain wall oscillation modes and spin wave modes in nanostrips

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Chinese Physics B 2024年第6期33卷 511-516页

作者：董新伟吴振江 Department of Physics and Institute of Theoretical Physics and Astrophysics Xiamen UniversityXiamen 361005China

Investigations on domain wall(DW) and spin wave(SW) modes in a series of nanostrips with different widths and thicknesses have been carried out using micromagnetic simulation. The simulation results show that the frequencies of SW modes and the corresponding DW modes are consistent with each other if they have the same node number along the width direction. This consistency is more pronounced in wide and thin nanostrips, favoring the DW motion driven by SWs.Further analysis of the moving behavior of a DW driven by SWs is also carried out. The average DW speed can reach a larger value of ~ 140 m/s under two different SW sources. We argue that this study is very meaningful for the potential application of DW motion driven by SWs.

关键词： micromagnetic simulation domain wall spin wave

Asymptomatic Norovirus Infection Among Children in Kindergartens and Primary Schools—Beijing Municipality,China,2021

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China CDC weekly 2023年第8期5卷 171-175页

作者： Qingrui Wu Xiuxia Wei Jianjun Zhang zhenjiang Xin Xiaoxing Yang Ling Zhang Meng Qin Xiaogen dong Hanqiu Yan Zhiyong Gao Fengtai District Center for Disease Control and Prevention BeijingChina Fangzhuang Community Health Service Center BeijingChina Beijing Center for Disease Control and Prevention BeijingChina School of Public Health Capital Medical UniversityBeijingChina

Summary What is already known about this topic?Children in kindergartens and primary schools are the high-incidence groups of norovirus acute gastroenteritis.However,asymptomatic norovirus infection among them is seldom reported.What is added by this report?The norovirus positive rate was 3.48% among asymptomatic children in kindergartens and primary schools in Beijing Municipality in June 2021,the most common genotype was GII.4 Sydney,and no acute gastroenteritis outbreak was reported over the study period.

关键词： acute Sydney infection

Grafting of MIPs from PVDF Membranes via Reversible Addition-fragmentation Chain Transfer Polymerization for Selective Removal of p-Hydroxybenzoic Acid

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Chemical Research in Chinese Universities 2018年第6期34卷 1051-1057页

作者： dong Yanying YU Ping SUN Qilong LU Yang TAN zhenjiang YU Xiaopeng School of Computer Science Key Laboratory of Numerical Simulation of Jilin Province School of Management Jilin Normal University Siping 136000 P. R. China

Effective molecularly imprinted membranes（MIMs） were developed as an efficient adsorbent for the selective removal ofp-hydroxybenzoic acid（p-HB） from acetylsalicylic acid（ASA, aspirin）. The MIMs were grafted successfully from poly（vinylidene fluoride） microfiltration membranes via reversible addition-fragmentation chain transfer（RAFT） polymerization. The graft copolymerization of acrylic acid（AA） in the presence of template p-hydroxybenzoic acid led to molecularly imprinted polymer（MIP） film coated membranes. The obtained MIMs were characterized by scanning electron microscopy（SEM）, Fourier transform infrared spectrophotometer（FTIR） and Raman spectra, and batch mode adsorption studies were carried ont to investigate the specific adsorption equilibrium, kinetics and selective recognition properties of different MIMs. The kinetic properties of the MIMs could be well described by the pseudo-second-order rate equation. Selective permeation experiments were performed to evaluate the permeation selectivity of the p-HB imprinted membranes. The observed performances of the MIMs are applicable to the further purification of aspirin. Keywords Acetylsalicylic acid; Reversible addition-fragmentation chain transfer; Molecularly imprinted membrane; p-Hydroxybenzoic acid; Selective adsorption

关键词： Acetylsalicylic acid Reversible addition-fragmentation chain transfer Molecularly imprinted membrane p-Hydroxybenzoic acid Selective adsorption

High area-capacity Mg batteries enabled by sulfur/copper integrated cathode design

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Journal of Energy Chemistry 2022年第9期31卷 370-378,I0011页

作者： Zhenfang Zhou Aobing Du Weijie Kong Zhuang Chen Zhonghua Zhang Bingbing Chen Yitao He Shanmu dong zhenjiang Li Guicun Li Guanglei Cui College of Materials Science and Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina Qingdao Industrial Energy Storage Research Institute Qingdao Institute of Bioenergy and Bioprocess TechnologyChinese Academy of SciencesQingdao 266101ShandongChina Department of Energy Science and Engineering Nanjing Tech UniversityNanjing 211816JiangsuChina Department of Physics Harbin Institute of TechnologyHarbin 150001HeilongjiangChina

Rechargeable Mg batteries potentially display lower cost and competitive energy density compared with their Li-ion counterparts.However,the practical implementation of high area-capacity cathodes still remains a formidably challenging task.This work presents the sulfur/copper integrated cathodes fabricated by the conventional blade-coating process and slurry-dipping method.The sulfur/copper foil integrated cathodes deliver a high area-capacity of 2.6 mAh cm^(-2)after 40 cycles,while the sulfur/copperfoam integrated cathode exhibits an ultrahigh area-capacity of 35.4 mAh cm^(-2),corresponding to 743.1 Wh L^(-1)at the electrode level(1.5 times higher than the LiCoO_(2)-graphite system).The in-situ formed copper sulfide intermediates with sufficient cation defects can act as functional intermediates to regulate the sulfur electrochemistry during the first discharge process.The subsequent cycles are operated by the reversible displacement reaction between Mg-ions and copper sulfide active substances.In particular,the copper ions prefer to extrude along the[001]direction in copper sulfides lattice and simultaneously the rock-salt MgS crystals are generated.Besides,the nonuniform surface topography of the cycled Mgmetal anode,caused by the spatial inhomogeneity in current distribution,is demonstrated to lead to the battery performance degradation for high area-capacity Mg batteries.

关键词： Magnesium batteries Sulfur cathode Displacement reaction Copper sulfides

MBGM: A Graph-Mining Tool Based on MapReduce and BSP

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ZTE Communications 2014年第4期12卷 16-22页

作者： Zhenjiang Dong Lixia Liu Bin Wu Yang Liu ZTE Corporation Beijing University of Posts and Telecommunications

This paper proposes an analytical mining tool for big graph data based on MapReduce and bulk synchronous parallel （BSP） com puting model. The tool is named Mapreduce and BSP based Graphmining tool （MBGM）. The core of this mining system are four sets of parallel graphmining algorithms programmed in the BSP parallel model and one set of data extractiontransformationload ing （ETE） algorithms implemented in MapReduce. To invoke these algorithm sets, we designed a workflow engine which optimized for cloud computing. Finally, a welldesigned data management function enables users to view, delete and input data in the Ha doop distributed file system （HDFS）. Experiments on artificial data show that the components of graphmining algorithm in MBGM are efficient.

关键词： cloud computing parallel algorithms graph data analysis data mining social network analysis

Mobile Internet WebRTC and Related Technologies

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ZTE Communications 2014年第1期12卷 46-51页

作者： Zhenjiang Dong Congbing Li Wei Wang Da Lyu ZTE Corporation

This paper describes an improved design for WebRTC technolo- gy. With this design, WebRTC communication at client side, server side, and between these two sides is improved. HTML5 WebSocket, media negotiation and synthesis, network address translator （NAT）/firewall traversal, Session Initiation Protocol （SIP） signaling interaction, and P2P communication security are all used in this improved design. This solution solves cross- browser running problem of WebRTC applications, reduces reli- ance on client-side processing capability, and reduces band- width consumption. With this design, WebRTC also become more scalable.

关键词： WebRTC technology application model running across brows-ers extension

Technical Analysis of Network Plug-in Flannel for Containers

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ZTE Communications 2017年第4期15卷 43-46页

作者： YANG Yong dong Xiugang dong zhenjiang Nanjing R&D Center ZTE Corporation

The development of cloud computing has made container tec-hnology a hot research issue in recent years. The container technology provides a basic support for micro service architecture, while container networking plays an important role in application of the container technology. In this paper, we study the technical implementation of the Flannel module, a network plug-in for Docker containers, including its func tions, implementation principle, utilization, and performance. The performance of Flannel in different modes is further tested and analyzed in real application scenarios.

关键词： container technology Docker network plug.in Flannel

Key Technologies and Application of Edge Computing

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ZTE Communications 2017年第2期15卷 26-34页

作者： TU Yaofeng dong zhenjiang YANG Hongzhang Nanjing R&D Center ZTE Corporation Nanjing 210021 China

Cloud computing faces a series of challenges,such as insufficient bandwidth,unsatisfactory real-time,privacy protection,and energy consumption.To overcome the challenges,edge computing emerges.Edge computing refers to a process where the open platform that converges the core capabilities of networks,computing,storage,and applications provides intelligent services at the network edge near the source of the objects or data to meet the critical requirements for agile connection,real-time services,data optimization,application intelligence,security and privacy protection of industry digitization.Edge computing consists of three elements:edge,computing,and intelligence.Edge computing and the Internet of Things(IoT)mutually create,and edge computing and cloud computing complement each other.In the architecture of edge computing,resources are distributed to the edge nodes,and therefore the storage system is near users while the computation function is near data.In this way,the stress on the backbone network can be lessened.With this architecture,the existing key technologies for computation,networks,and storage will change significantly.ZTE’s edge computing solutions can ensure the service quality of operators and greatly enhance the experience of mobile users.

关键词： edge computing cloud computing IoT

不同营林管理模式对复垦土壤养分和重金属含量的影响

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林业建设 2022年第4期 31-34页

作者：董振江黑龙江省伊春森工友好林业局有限责任公司黑龙江伊春153031

针对复垦土壤不同营林管理模式对其养分和重金属含量的影响,主要探讨了三种处理模式,即灌溉模式、施肥模式、施肥+灌溉模式。对比了三种处理模式分别对土壤养分含量、含水率以及重金属含量产生的影响。试验表明,降低重金属含量效果最佳... 详细信息

针对复垦土壤不同营林管理模式对其养分和重金属含量的影响,主要探讨了三种处理模式,即灌溉模式、施肥模式、施肥+灌溉模式。对比了三种处理模式分别对土壤养分含量、含水率以及重金属含量产生的影响。试验表明,降低重金属含量效果最佳的为施肥+灌溉模式,与其它处理模式相比,施肥+灌溉模式的全氮和有机质含量最高,而含水率最高的为灌溉处理模式。经过对试验段结果的综合分析可知,施肥+灌溉模式为最佳营林管理模式,并对复垦土壤的修复效果可达到最佳。

关键词：复垦用地营林管理模式土壤养分重金属含量