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| 1 | Classification of hypersurfaces with parallel Mobius second fundamental form in S^(n+1)显示文摘Let Mn(n≥2) be an immersed umbilic-free hypersurface in the(n+1)-dimensional unit sphere Sn+1. Then Mn is associated witha so-called M(o)bius metric g, and a M(o)bius second fundamental form Bwhich are invariants of Mn under the M(o)bius transformation groupof Sn+1.In this paper, we classify all umbilic-free hypersurfaces withparallel M(o)bius second fundamental form. | HU Zejun LI Haizhong Department of Mathematics, Zhengzhou University Zhengzhou 450052, China Department of Mathematical Sciences, Tsinghua University, Beijing 100084, China | 2004 | Science China Mathematics2004，47，3： | 33 |
| 2 | Classification of hypersurfaces with constant Laguerre eigenvalues in R^n显示文摘Let x:M → Rn be an umbilical free hypersurface with non-zero principal curvatures.Then x is associated with a Laguerre metric g,a Laguerre tensor L,a Laguerre form C,and a Laguerre second fundamental form B,which are invariants of x under Laguerre transformation group.An eigenvalue of Laguerre tensor L of x is called a Laguerre eigenvalue of x.In this paper,we classify all oriented hypersurfaces with constant Laguerre eigenvalues and vanishing Laguerre form. | LI TongZhu LI HaiZhong WANG ChangPing | 2011 | Science China Mathematics2011，54，6： | 10 |
| 3 | Integral Formulas for Compact Spacelike Hypersurfaces in de Sitter Space and their Applications to Goddard's Conjecture | Li Haizhong (Department of Applied Mathematics,Tsinghua University,Beijing 100084,China)(Email:hli@math.tsinghua.edu.cn)Chen Weihuan (Department of Mathematics,Peking University,Beijing 100871,China)(Email:whchen@sxx0.math.pku,edu.cn) | 1998 | Acta Mathematica Sinica,English Series1998，14，2： | 10 |
| 4 | Fluid Flow in Tundish Due to Different Type Arrangement of Weir and Dam显示文摘Tundish is an important metallurgical reactor in the continuous casting process. In order to control the fluid flow in tundish and thus take full advantage of the residence time available for the removal of inclusions from molten steel, the effect of weir and dam on the fluid flow has been studied in a water model based on the characteristic number Froude and Reynold number similarity criteria. The residence time distribution curves of the flow were measured by SG800, The optimum arrangement of dam and weir and the non- stationary flow in tundish were discussed. The results show that the combination of weir and dam is benefit for the flow pattern in tundish, weir can prevent the upper recirculating flow, dam can cut off the bottom flow and turn to upwards, it is advantageous to separate the nonmetallic inclusions. Furthermore, it is important to exceed the critical depth of bath during exchange ladles, not only for the inclusion floatation but also for avoiding tundish slag drainage earlier. | Yanping Bao, Wei Jiang,Baomei Xu, Haizhong Zhang Metallurgy School, University of Science and Technology Beijing, Beijing 100083, China E-mail: baoyp@metall .ustb .edu. cn | 2002 | Journal of University of Science and Technology Beijing2002，9，1： | 8 |
| 5 | Some pinching theorems for minimal submanifolds in S^m(1)×R显示文摘Let Mn be an n-dimensional compact minimal submanifolds in Sm(1)×R.We prove two pinching theorems by the Ricci curvature and the sectional curvature pinching conditions respectively.In fact,we characterize the Clifford tori and Veronese submanifolds by our pinching conditions respectively. | CHEN Hang CHEN GangYi LI HaiZhong | 2013 | Science China Mathematics2013，56，8： | 7 |
| 6 | Directly accessing octave-spanning dissipative Kerr soliton frequency combs in an AlN microresonator显示文摘Self-referenced dissipative Kerr solitons (DKSs) based on optical microresonators offer prominent characteristics allowing for various applications from precision measurement to astronomical spectrometer calibration. To date,direct octave-spanning DKS generation has been achieved only in ultrahigh-Q silicon nitride microresonators under optimized laser tuning speed or bi-directional tuning. Here we propose a simple method to easily access the octave-spanning DKS in an aluminum nitride (AlN) microresonator. In the design,two modes that belong to different families but with the same polarization are nearly degenerate and act as a pump and an auxiliary resonance,respectively. The presence of the auxiliary resonance can balance the thermal dragging effect,crucially simplifying the DKS generation with a single pump and leading to an enhanced soliton access window. We experimentally demonstrate the long-lived DKS operation with a record single-soliton step (10.4 GHz or83 pm) and an octave-spanning bandwidth (1100–2300 nm) through adiabatic pump tuning. Our scheme also allows for direct creation of the DKS state with high probability and without elaborate wavelength or power schemes being required to stabilize the soliton behavior. | HAIZHONG WENG JIA LIU ADNAN ALI AFRIDI JING LI JIANGNAN DAI XIANG MA YI ZHANG QIAOYIN LU JOHN F.DONEGAN WEIHUA GUO | 2021 | Photonics Research2021，9，7： | 6 |
| 7 | Macro-micromechanical approaches for non-coaxiality of coarse grained soils显示文摘For coarse grained soils,their principal stress directions may change when the water level of embankment dam varies instantaneously.In this loading case,the principal directions of stress and strain rate will become non-coaxial.In an effort to model non-coaxial behavior,a modified three-dimensional non-coaxial model is developed in the context of vertex yield(tangent plasticity) theory.Discrete Element Method(PFC) incorporating user-defined interparticle contact models is also employed to gain an insight into microscopic mechanism of non-coaxiality.The analysis focuses on non-coaxial behaviors under simple shear condition.It has been shown that the proposed non-coaxial model gives good predictions for non-coaxiality with reference to microscopic observations while the classical coaxial model fails to simulate the non-coaxial behaviors.In general,non-coaxiality as a result of the rotation of principal stress,is large at a small shear strain,and inclined to become negligible with increasing shear strain.For coarse grained soils,their non-coaxiality tends to largely depend on the initial normal pressure,where a larger degree of non-coaxiality can be observed at a higher pressure. | QIAN JianGu 1,2,HUANG MaoSong 1,2 & SUN HaiZhong 1,2 1 Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China 2 Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China | 2011 | Science China(Technological Sciences)2011，54，S1： | 5 |
| 8 | Morphology and Mechanical Properties of PS/Al_2O_3 Nanocomposites Based on Selective Laser Sintering显示文摘Selective laser sintering (SLS) is a new process to prepare the polystyrene (PS)/AI2O3 nanocomposites. In thispaper, with different laser power and other processing parameters unchanged, the morphology, density and mechanicalproperties of the sintered specimens were investigated. It was found that nano-sized inorganic particles are uniformlylocated in the PS matrix and the maximum density of the sintered specimens with pure PS powder reaches 1.07 g/cm3,higher than 1.04 g/cm3 that of the sintered specimens with mixture powder. Due to strengthening and toughness ofthe nano-sized AI2O3 inorganic particles, the maximum notched impact strength and tensile strength of the sinteredpart mixed with nano-sized inorganic particles are improved greatly from 7.5 to 12.1 kJ/m2 and from 6.5 to 31.2 MPa,respectively, under the same sintering condition. | Zhifeng XU Jian ZHANG Haizhong ZHENG Changchun CAI Yinhui HUANG | 2005 | Journal of Materials Science & Technology2005，21，6： | 5 |
| 9 | Characterization and Fine Mapping of a Necrotic Leaf Mutant in Maize(Zea mays L.)显示文摘玉米(Zea mays L.) 是商业地重要的庄稼。它的收益能被变化在引起死亡的 biosynthetic 和 degradative 小径减少。在这份报纸,我们描述坏死的叶(nec-t ) 异种,从一根生来的线被获得, 81647。nec-t 异种植物与坏死的点有黄叶子,减少了叶绿素内容,并且变白的幼苗在正常生长条件下面死了。传播电子显微镜学揭示了散布 thylakoids,并且每房间减少了 grana lamellae 和叶绿体的数字。组织化学的染色建议 nec-t 叶子的那点形成可能由于房间死亡。基因分析证明那坏死被一个后退的地点的变化引起。用简单顺序重复标记, Nec-t 基因在染色体 2 的短手臂上在 mmc0111 和 bnlg2277 之间被印射。有从一张 F2 人口的变异的显型的 1287 个个人的一个总数被用于物理印射。Nec-t 基因在标记 T31 和 H8 之间位于 131.7 kb 的一个物理区域以内。 | Lijing Wang Shuai Han Shiyi Zhong Haizhong Wei Yanjun Zhang Yan Zhao Baoshen Liu | 2013 | Journal of Genetics and Genomics2013，40，6： | 5 |
| 10 | Temperature-dependent evolution of surface charge screening and polarization at ferroelectric surfaces显示文摘The polarization and domain behavior on the surface of a ferroelectric material are significantly affected by the screening processes [1-12].Recently,there has been a notable increase in the theoretical calculations and experiments investigating the dynamics of polarization and domain behaviors coexisting in phase transitions of ferroelectric materials. | LongFei Wang Yi Luo JieSu Wang XiuShi Huang ZhaoMeng Gao TieYing Yang XiaoLong Li Pei Li KuiJuan Jin WeiFeng Zhang HaiZhong Guo | 2019 | Science China(Physics,Mechanics & Astronomy)2019，62，8： | 3 |
| 11 | A study on surface symmetry and interfacial enhancement of SrTiO_3 by second harmonic generation显示文摘The symmetry of the surfaces of SrTiO3and slightly Nb-doped SrTiO3crystals was investigated by the optical reflected second harmonic generation technique.The good agreement between experimental and theoretical results of the second harmonic intensity dependence on the azimuth angle indicates that the SrTiO3(001)surface is with 4mm symmetry and the Nb-doped SrTiO3(111)surface with 3m symmetry.The measurements of the polarization dependent second harmonic intensity confirm that conclusion.The enhancement of the surface polarization in the structure of SrTiO3capped La0.9Sr0.1MnO3films compared with that in the La0.9Sr0.1MnO3films has been obtained. | ZHAO RuiQiang JIN KuiJuan GUO HaiZhong LU HuiBin YANG GuoZhen | 2013 | Science China(Physics,Mechanics & Astronomy)2013，56，12： | 3 |
| 12 | Analogues of Hadwiger's Theorem in Space IR^n—Sufficient Conditions for a Convex Domain to Enclose Another | Zhou Jiazu Department of Mathematics,Guizhou Normal University,Guiyang,550001 China Li Haizhong Department of Mathematics,Zhengzhou University,Zhengzhou,450052 China Chen Xingyue Department of Mathematics,Chongqing Teacher’s College,Yongchuan,632168 China | 1995 | Acta Mathematica Sinica,English Series1995，11，1： | 2 |
| 13 | Chimeric classical swine fever (CSF)-Japanese encephalitis (JE) viral replicon as a non-transmissible vaccine candidate against CSF and JE infections显示文摘 | Zhenhua Yang Rui Wu Robert W. Li Ling Li Zhongliang Xiong Haizhong Zhao Deyin Guo Zishu Pan | 2012 | Virus Research2012，，1： | 2 |
| 14 | Mechanical properties,thermophysical properties and electronic structure of Yb^(3+)or Ce^(4+)-doped La_(2)Zr_(2)O_(7)-based TBCs显示文摘First-principles calculations based on density functional theory were perfo rmed to investigate the cohesive energies,elastic modulus,Debye temperatures,thermal conductivities and density of states of La_(2-x)Yb_(x)Zr_(2)O_(7),La_(2)Zr_(2-x)Ce_(x)O_(7)and La_(2-x)Yb_(x)Zr_(2-x)Ce_(x)O_(7)(x=0.00,0.25,0.50,0.75,1.00)ceramics.The results show that doping Yb~(3+)or Ce~(4+)into La_(2)Zr_(2)O_(7)reduces its elastic modulus,thermal conductivity and Debye temperature.Compared with La_(2-x)Yb_(x)Zr_(2)O_(7)(x≠0.00),La_(2)Zr_(2-x)Ce_(x)O_(7)compounds have better ductility and lower Debye te mperature.The Debye temperature values of La_(2)Zr_(2-x)Ce_(x)O_(7)(x≠0.00)co mpounds are in the range of 485.0-511.5 K.Among all components,the fluorite-type La_(2-x)Yb_(x)Zr_(2-x)Ce_(x)O_(7)(x=0.75,1.00)compounds exhibit better mechanical and thermophysical properties,and their thermal conductivity values are only 1.213-1.246 W/(m·K)(1073 K),which are 14.5%-16.7%lower than that of the pure La_(2)Zr_(2)O_(7).Thus,our findings open an entirely new avenue for TBCs. | Pengsen Zhao Haizhong Zheng Guifa Li Yongxiang Geng Yixin Xiao Hongbo Guo Ping Peng | 2023 | Journal of Rare Earths2023，41，4： | 2 |
| 15 | Microstructure and wear resistance of Fe-based WC coating by multi-track overlapping laser induction hybrid rapid cladding显示文摘 | Shengfeng Zhou Xiaoqin Dai Haizhong Zheng | 2011 | Optics and Laser Technology2011，，1： | 1 |
| 16 | Room temperature ionic liquid 1-ethyl-3-hexylimidazolium-bis (tri- fluoromethylsulfonyl)-imide as lubricant for steel-steel con- tact显示文摘 | Lu Qimlng Wang Haizhong Ye Chengfeng | 2004 | Tribology International2004，37，7： | 1 |
| 17 | Benzimidazolyl phosphates as anti‐wear additives in poly(ethylene glycol) for steel/steel contacts显示文摘 | Dan Qiao Haizhong Wang Dapeng Feng | 2014 | Lubr Sci2014，，1： | 1 |
| 18 | Tribological performance of phosphate ionic liquids as lubricants for steel-on-aluminum contact显示文摘 | Dan Qiao Haizhong Wang Dapeng Feng | 2013 | Proceedings of the Institution of Mechanical Engineers Part J: Journal of Engineering Tribology2013，，11： | 1 |
| 19 | Experiments on large-diameter welded hollow spherical joint显示文摘 | CHEN Haizhong ZHU Hongping | | 0，，： | 1 |
| 20 | Analytical modeling and experimental investigation of laser induction hybrid rapid cladding for Ni based WC composite coatings 显示文摘 | Shengfeng Zhou Xiaoqin Dai Haizhong Zheng | 2011 | Optics & Laser Technology2011，43，3： | 1 |
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