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Data Reconstruction in Internet Traffic Matrix

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China Communications 2014年第7期11卷 1-12页

作者： zhou huibin ZHANG Dafang XIE Kun WANG Xiaoyang College of Computer Science and Electronic Engineering Hunan University Changsha 410082 P. R. China

Traffic matrix is an abstract representation of the traffic volume flowing between sets of source and destination *** is a key input parameter of network operations management,planning,provisioning and traffic *** matrix is also important in the context of OpenFlow-based *** even good measurement systems can suffer from errors and data collection systems can fail,missing values are *** matrix completion methods do not consider traffic exhibit characteristics and only provide a finite *** address this problem,this paper proposes a novel approach based on compressive sensing and traffic self-similarity to reconstruct the missing traffic flow ***,we analyze the realworld traffic matrix,which all exhibit lowrank structure,temporal smoothness feature and spatial ***,we propose Self-Similarity and Temporal Compressive Sensing(SSTCS) algorithm to reconstruct the missing traffic *** extensive experiments with the real-world traffic matrix show that our proposed SSTCS can significantly reduce data reconstruction errors and achieve satisfactory accuracy comparing with the existing *** SSTCS can successfully reconstruct the traffic matrix with less than 32%errors when as much as98%of the data is missing.

关键词：流量矩阵数据重建网络交通流数据数据收集系统自相似性运营管理输入参数

Development and Oxidation Behavior of Al-Cu-Fe Quasicrystalline Coating on Ti Alloy

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Journal of Materials Science & Technology 2004年第6期20卷 713-715页

作者： Fei CAI, Chungen zhou, huibin XU and Shengkai GONGDepartment of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100083, China Dept. of Mat. Sci. and Eng. Beijing Univ. of Aero. and Astron. Beijing 100083 China

An oxidation resistant Al-Cu-Fe quasicrystalline coating was fabricated on substrate of Ti alloy by low pressure plasma spraying (LPPS) method. As-sprayed Al-Cu-Fe coating has a rapidly solidified lamellar microstructure consisting of quasicrystalline phase and crystalline phase. The formation of quasicrystalline coating is related to the annealing. The results from the ox!dat!on experiments showed that Al-Cu-Fe quasicrystalline coating improved the oxidation resistance of Ti-base alloys. During the oxidation period there is no evident spallation of the coating from the substrate. Oxide formed on the surface of Al-Cu-Fe quasicrystalline coating after oxidation consisted of Al2O3. Oxidation occurs Ieading to a change of concentration and phase transformation in the coating surface. Selective oxidation of AI transforms the quasicrystalline phase into the phase.

关键词： Low pressure plasma spray Ti-base alloy Al-Cu-Fe quasicrystal Oxidation Coating

Investigation of point-contact Andreev reflection on magnetic Weyl semimetal Co3Sn2S2

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Science China(Physics,Mechanics & Astronomy) 2020年第8期63卷 107-113页

作者： He Wang YanZhao Liu huibin zhou HaoRan Ji JiaWei Luo JiaWei Zhang TianHeng Wei PinYuan Wang Shuang Jia Jian Wang Department of Physics Capital Normal UniversityBeijing 100048China International Center for Quantum Materials School of PhysicsPeking UniversityBeijing 100871China Collaborative Innovation Center of Quantum Matter Beijing 100871China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100190China Beijing Academy of Quantum Information Sciences Beijing 100193China

Magnetic Weyl semimetals(WSMs)with broken time-reversal symmetry(TRS)hosting topological band structures are expected to provide an ideal platform for investigating topological superconductivity and ***,the experimental verification of magnetic WSMs is very *** recently,the kagome magnet Co3Sn2S2 was confirmed to be a magnetic WSM by both angle-resolved photoemission spectroscopy and scanning tunneling spectroscopy and consequently has become the focus of great *** paper reports a point-contact Andreev-reflection spectroscopy(PCARS)investigation on the(001)surface and the side surface of the Co3Sn2S2 single crystals,*** measurements from the sample’s(001)and side surfaces provide experimental evidence for transport spin polarization in the Co3Sn2S2 magnetic ***,the superconducting proximity effect in the Co3Sn2S2 single crystal is successfully *** point-contact spectra(PCS)along the in-plane direction cannot be well fitted by theoretical models based on s-wave pairing,indicating that possible triplet p-wave superconductivity may be triggered at the interface,which paves the way for the future exploration of the topological superconductivity and Majorana states in broken TRS WSMs.

关键词： magnetic Weyl semimetal point contact pairing symmetry superconducting proximity effect

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前期物业服务合同对单个业主的法律约束力

湖湘法学评论 2022年第4期2卷 66-87页

作者：周辉斌湖南师范大学法学院湖南长沙410081

《民法典》除了第939条笼统规定“建设单位依法与物业服务人订立的前期物业服务合同对业主具有法律约束力”之外,对于前期物业服务合同涉及的其它法律问题大都付诸阙如。在具体个案中,法院对于单个业主是否为前期物业服务合同当事人、... 详细信息

《民法典》除了第939条笼统规定“建设单位依法与物业服务人订立的前期物业服务合同对业主具有法律约束力”之外,对于前期物业服务合同涉及的其它法律问题大都付诸阙如。在具体个案中,法院对于单个业主是否为前期物业服务合同当事人、单个业主是否有权主张前期物业服务合同无效、是否有权解除前期物业服务合同以及前期物业服务合同的变更对于单个业主是否具有法律约束力等问题,不应拘泥于《民法典》第939条的文义解释,应当结合《民法典》和《物业管理条例》的其它相关规定,运用利益衡量的方法进行体系解释和目的解释,承认和维护单个业主作为前期物业服务合同当事人的地位和权利。

关键词：前期物业服务合同《民法典》第939条单个业主法律约束力

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SAA induces M2 macrophage-specific gene expression and promotes efferocytosis of apoptotic neutrophils

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SAA induces M2 macrophage-specific gene expression and promo...

高强韧桥梁钢Q690q的单轴拉伸性能与低周疲劳性能

第八届全国免疫学学术大会

作者： Lei Sun huibin zhou Ziyan Zhu Richard D.Ye School of Pharmacy Shanghai Jiaotong University

Macrophages play an important role in the quality, duration and magnitude of most inflammatory reactions in a polarized *** alternatively activated macrophages(M2) produce anti-inflammatory cytokines and promote efferocytosis to resolve ***, the determinants that modulate their plasticity remain *** amyloid A(SAA) is an acute-phase protein which induces both anti-inflammatory and pro-inflammatory cytokines during *** this study, we explored the potential involvement of SAA in modulating macrophage *** not only induced the expression of anti-inflammatory M2-specific genes such as IL-10, Arginase-1, Ym-1, Fizz-1, Mrc-1, IL-1 Rn, but also promoted phagocytosis of apoptotic neutrophils(also called efferocytosis), a process that is critical for the resolution of inflammation, in both human peripheral blood mononuclear cells(PBMC) and mouse primary *** experiments with formyl peptide receptor 2(Fpr2) antagonist W RW4 and Fpr2 deficient macrophages, we showed that the induction of M2-specific genes and efferocytosis by SAA were mediated specifically by Fpr2, one of the SAA ***, SAA stimulation resulted in the increase expression and activation of the transcript factor I *** inhibitors of E RK activity abrogated SAA induction upon M2 macrophages and efferocytosis by decreasing the expression and activation of the transcription factor I RF4, suggesting an important role of I RF4 in SAA induced M2 macrophage *** results demonstrate that SAA can induce M2 macrophage-specific genes and promote efferocytosis via Fpr2-E RK-I RF4 signaling, and suggests an alternative mechanism by which SAA is involved in anti-inflammatory responses.

关键词： macrophage polarization serum amyloid A efferocytosis

来源： cnki会议评论

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金属热处理 2024年第2期49卷 25-31页

作者：彭宁琦周文浩金东浩武会宾湖南华菱湘潭钢铁有限公司技术质量部湖南湘潭411101 北京科技大学钢铁共性技术协同创新中心北京100083

针对热机械轧制(TMCP)+回火(T)和调质(QT)两种工艺处理的Q690q桥梁钢板,进行了表面和心部的单轴拉伸和低周疲劳试验,同时利用光学显微镜和扫描电镜对表面和心部的微观组织及原始奥氏体晶粒尺寸进行了观察,并分析了其对拉伸性能和低周疲... 详细信息

针对热机械轧制(TMCP)+回火(T)和调质(QT)两种工艺处理的Q690q桥梁钢板,进行了表面和心部的单轴拉伸和低周疲劳试验,同时利用光学显微镜和扫描电镜对表面和心部的微观组织及原始奥氏体晶粒尺寸进行了观察,并分析了其对拉伸性能和低周疲劳性能的影响。结果表明,TMCP+T工艺钢板的微观组织主要由板条贝氏体(LB)、粒状贝氏体(GB)和少量马奥岛(M/A)组成,表面的LB占大多数,且比心部的组织更加细小,同时原始奥氏体晶粒尺寸较均匀;与心部相比,表面的屈服强度、抗拉强度、屈强比及伸长率均增大,低周疲劳寿命明显提高。而QT工艺钢板的微观组织以回火索氏体(TS)和GB为主,心部的GB占比增加,但比表面的组织反而细小些,同时原始奥氏体晶粒也更为细小均匀;与表面相比,心部的屈服强度、抗拉强度、屈强比及伸长率均减小,但低周疲劳寿命反而提高。两种工艺相比,无论是表面还是心部,TMCP+T工艺钢板的屈服强度较低,抗拉强度较高,屈强比较低,同时伸长率较低。而两种工艺钢板的低周疲劳寿命变化范围极为接近,处理工艺对试验钢的低周疲劳性能影响不大。同时对拉伸性能与低周疲劳性能之间的相关性进行分析,表明疲劳强度系数与抗拉强度呈线性相关,疲劳延性系数与伸长率呈线性相关。

关键词： Q690q桥梁钢热机械轧制调质拉伸性能疲劳寿命

Colossal magnetoresistance and spin-glass properties of La(1-x)TexMnO3(x=0.04,0.1)

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Chinese Science Bulletin 2003年第13期48卷 1321-1324页

作者： TAN Guotai, DUAN Peng, DAI Shouyu, CHEN Zhenghao, LU huibin & zhou Yueliang Laboratory of Optical Physics, Institute of Physics & Center for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China Correspondence should be addressed to Chen Zhenghao (e-mail: zhchen @***) Laboratory of Optical Physics Center for Condensed Matter Physics Chinese Academy of Sciences Beijing 100080 China

For the first time, a novel material of La1-x- TexMnO3 (x = 0.04, 0.1), in which the La ions are replaced by the nonmetal element Te in the Chalcogen, has been synthesized. The material has a rhombohedral lattice with the space group of R3c, and Te ions have a tetravalence state. The curves of the resistivity vs. temperature indicate that this material has the property of a metal-semiconductor transition and the colossal magnetoresistance (CMR) effect. The maximum magnetoreistance ratio MR=[(0)()]/(0)H? is about 51% at 4 T for x = 0.1. Besides, a spin-glass behavior at low magnetic fields is observed in this compound.

关键词：巨磁电阻 La1-xTexMnO3 镧碲物理性质

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铝基板阳极氧化封孔工艺对覆铜板性能的影响

电镀与涂饰 2024年第4期43卷 32-39页

作者：潘林铮秦会斌周继军罗炜杰杭州电子科技大学新型电子器件与应用研究所浙江杭州310000

[目的]探究铝基板阳极氧化封孔工艺对覆铜板性能的影响。[方法]先采用草酸对7075铝合金阳极氧化,再在真空条件下采用Al_(2)O_(3)溶胶或/和ZnO溶胶进行封孔处理,并在300℃下加热固化。研究了两种溶胶单独封孔或组合封孔及封孔次数对阳极... 详细信息

[目的]探究铝基板阳极氧化封孔工艺对覆铜板性能的影响。[方法]先采用草酸对7075铝合金阳极氧化,再在真空条件下采用Al_(2)O_(3)溶胶或/和ZnO溶胶进行封孔处理,并在300℃下加热固化。研究了两种溶胶单独封孔或组合封孔及封孔次数对阳极氧化膜导热系数与耐电压强度的影响。此外,还采用封孔样品为基板,分别通过溅射镀铜与热压合工艺制备铝基覆铜板。[结果]采用Al_(2)O_(3)溶胶和ZnO溶胶交替封孔4次可将阳极氧化膜的耐电压强度提升2.90倍左右,但会使其导热性略微变差。通过溅射镀铜所得覆铜板的剥离强度高达1.15N/mm,并且耐热性良好。[结论]对铝基板进行阳极氧化封孔能够显著改善覆铜板的性能。

关键词：铝基覆铜板阳极氧化封孔溶胶氧化铝氧化锌剥离强度耐热性

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Field-Induced Metal–Insulator Transition inβ-EuP3

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Chinese Physics Letters 2020年第10期37卷 87-91页

作者：王光强常国庆周慧斌马文龙林新 MZahid Hasan 徐苏扬贾爽 International Center for Quantum Materials School of PhysicsPeking UniversityBeijing 100871China Laboratory of Topological Quantum Matter and Advanced Spectroscopy(B7) Department of PhysicsPrinceton UniversityPrincetonNJ 08544USA Institute of Physics Academia SinicaTaipei 11529China Lawrence Berkeley National Laboratory BerkeleyCA 94720USA Department of Physics Massachusetts Institute of TechnologyCambridgeMassachusetts 02139USA Collaborative Innovation Center of Quantum Matter Beijing 100871China CAS Center for Excellence in Topological Quantum Computation University of Chinese Academy of SciencesBeijing 100190China Beijing Academy of Quantum Information Sciences Beijing 100193China

Metal–insulator transition(MIT)is one of the most conspicuous phenomena in correlated electron *** such a transition has rarely been induced by an external magnetic field as the field scale is normally too small compared with the charge *** present the observation of a magnetic-field-driven MIT in a magnetic semiconductorβ-EuP ***,we find a colossal magnetoresistance in an extreme way:the resistance drops billionfold at 2 K in a magnetic field less than 3 *** ascribe this striking MIT as a field-driven transition from an antiferromagnetic and paramagnetic insulator to a spin-polarized topological semimetal,in which the spin configuration of Eu 2+cations and spin-orbital coupling play a crucial *** a phosphorene-bearing compound whose electrical properties can be controlled by the application of field,β-EuP 3 may serve as a tantalizing material in the basic research and even future electronics.

关键词： Transition transition extreme