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Study　on　diel　rhythm　of　chlorophyll　a　and　photosynthesis　in　nearshore　waters　of　Qingdao

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Acta Oceanologica Sinica 1998年第2期17卷 243-254页

作者： Mao x. Zhu M. yang x. Hao Y. Cullen J. First Institute of Oceanography State Oceanic Administration Qingdao 266003 China Dalhousie University Halifax NS B3H 4J1 Canada

ＳｔｕｄｙｏｎｄｉｅｌｒｈｙｔｈｍｏｆｃｈｌｏｒｏｐｈｙｌｌａａｎｄｐｈｏｔｏｓｙｎｔｈｅｓｉｓｉｎｎｅａｒｓｈｏｒｅｗａｔｅｒｓｏｆＱｉｎｇｄａｏＭａｏＸｉｎｇｈｕａ，ＺｈｕＭｉｎｇｙｕａｎ，ＹａｎｇＸｉａｏｌｏｎ... 详细信息

ＳｔｕｄｙｏｎｄｉｅｌｒｈｙｔｈｍｏｆｃｈｌｏｒｏｐｈｙｌｌａａｎｄｐｈｏｔｏｓｙｎｔｈｅｓｉｓｉｎｎｅａｒｓｈｏｒｅｗａｔｅｒｓｏｆＱｉｎｇｄａｏＭａｏＸｉｎｇｈｕａ，ＺｈｕＭｉｎｇｙｕａｎ，ＹａｎｇＸｉａｏｌｏｎｇ，ＨａｏＹａｗｅｉａｎｄＪｏｈｎ...

关键词： chlorophyll rhythm diel Study

CHARACTERISTICS OF RE-Ni-B-Al₂O₃ COATING MATERIAL

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中国有色金属学会会刊：英文版 1996年第2期6卷 33-36页

作者： Guo Z. yang x. Liu H. Wang Z. Wang M. Department of Metallurgy Kunming Institute of Technology Kunming 650093 China

ＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＲＥ－Ｎｉ－Ｂ－Ａｌ２Ｏ３ＣＯＡＴＩＮＧＭＡＴＥＲＩＡＬＧｕｏＺｈｏｎｇｃｈｅｎｇ；ＹａｎｇＸｉａｎｗａｎ；ＬｉｕＨｏｎｇｋａｎｇ；ＷａｎｇＺｈｉｙｉｎ；ＷａｎｇＭｉｎ(Ｄｅｐａｒｔ... 详细信息

ＣＨＡＲＡＣＴＥＲＩＳＴＩＣＳＯＦＲＥ－Ｎｉ－Ｂ－Ａｌ２Ｏ３ＣＯＡＴＩＮＧＭＡＴＥＲＩＡＬＧｕｏＺｈｏｎｇｃｈｅｎｇ；ＹａｎｇＸｉａｎｗａｎ；ＬｉｕＨｏｎｇｋａｎｇ；ＷａｎｇＺｈｉｙｉｎ；ＷａｎｇＭｉｎ(ＤｅｐａｒｔｍｅｎｔｏｆＭｅｔａｌｌｕｒｇｙ...

关键词： RE-Ni-B-Al2O3 composite material coating aterial, amorphous, crystalline

DYNAMIC MECHANICAL BEHAVIORS OF AS-CAST STAINLESS STEEL 1Cr-25Ni20Si2 DURING HOT DEFORMATION

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Acta Metallurgica Sinica(English Letters) 2000年第2期13卷 465-469页

作者： H. Y. Leng, K. yang and W. x. Han Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110015, China

The dynamic mechanical behaviors of as-cast 1Cr25Ni20Si2 austenite stainless steel during hot deformation for been studied using Gleeble-1500 hot working *** hot deformation equation, the deformation activation energy, the criterion of occurring dynamic recrystallization and the relationship between peak strain and peak stress have been resulted through the ex.eriments.

关键词： hot deformation austenite stainless steel dynamic behavior

Relationship between the ex.ression of matrix.metalloproteinase-9 and angiogenesis in glioma and its clinical significance

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Journal of Pharmaceutical Analysis 2008年第2期20卷 113-118页

作者： yang x. Liu M. Wang M. Liu S. Wang T. Wang H. Medical Center of Rehabilitation First Affiliated Hospital Medical School of Xi'an Jiaotong University Xi'an 710061 China Department of Neurosurgery First Affiliated Hospital Medical School of Xi'an Jiaotong University Xi'an 710061 China Department of Pathology First Affiliated Hospital Medical School of Xi'an Jiaotong University Xi'an 710061 China

Objective To ex.lore the role and significance of matrix.metalloproteinase-9(MMP-9)in angiogenesis through observing the relationship between the ex.ression of MMP-9 and microvessel density(MVD)in *** The ex.ressions of MMP-9 and CD34 in 10 cases of normal brain tissues and 58 cases of glioma(14 cases of grade Ⅰ,20 cases of grade Ⅱ,15 cases of grade Ⅲ,and 9 cases of grade Ⅳ)were detected by immunohistochemical streptavidin-perox.dase *** positive cells of MMP-9 and the positive microves...

关键词： Angiogenesis Glioma Invasion Matrix.metalloproteinase-9

The Least Order Observer Based Sensorless Control of PMSG in Direct-Drive Wind Turbines

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Journal of Energy and Power Engineering 2011年第7期5卷 665-670页

作者： S.Y. yang x. Zhang C.W. Zhang Z. x.e School of Electrical Engineering and Automation Hefei University of Technology Hefei 230009 China

Permanent magnet synchronous Generator （PMSG） based direct-drive wind energy conversion system （WECS） has been attracting wide attentions. For the special application, sensorless control for PMSG is desired. By widely studying the previous contributes, a novel estimator based on back-EMF is proposed. The estimator is composed of back-EMF observer and a phase-lock-loop （PLL） control to get the rotor-flux.speed and position. The estimator not only can be used for interior and surface permanent magnet synchronous generators, but also has a compact and symmetrical structure, which makes it be beneficial for implementation. Compared with previous strategies, the EMF observer is independent of the PLL control, which would simplify the observer design. Meanwhile, the proposed estimator is less sensitive to parameter variations. Based on mathematic models of PMSG, the proposed estimator was analyzed in detail, and the realizing process was also presented. To validate the proposed estimator, the important ex.eriment results are reported.

关键词： Back-EMF PLL PMSG sensorless control wind energy conversion system.

Discovery of new MAx.phase-like layered ternary carbide V_(8)P_(6)C:Crystal structure,thermal ex.ansion,and elastic properties

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Journal of Materials Science & Technology 2024年第7期174卷 55-62页

作者： H.x.Chen L.Sheng Z.L.Zhang x.C.Wen D.L.yang x.Y.Ye P.Q.Dai School of Materials Science and Engineering Fujian University of TechnologyFuzhou 350118China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of ScienceBeijing 100049China Fujian Provincial Key Laboratory of Advanced Materials Processing and Application Fuzhou 350118China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China

Due to the laminated structure,MAx.phases and MAx.phase-like compounds possess outstanding dam-age tolerance capability with good thermal/electrical conductivity and other charming functional prop-erties,showing a bright future for structural-functional ***,a new MAx.phase-like ternary car-bide V_(8)P_(6)C with layered characteristics was *** to the alternate stacking of hex.gonal-arranged M/A/x.atom layers in MAx.phases,V_(8)P_(6)C has a layered structure formed by a repeated stacking of the slabs consisting of V_(6)C-octahedrons and VP 6-distorted-octahedrons in three-atomic layers *** thermal ex.ansion anisotropy was revealed,with the thermal ex.ansion coefficients(TECs)along a-ax.s,c-ax.s,and the average value,equal toα_(a)=8.55(5)μK^(−1),α_(c)=10.23(5)μK^(−1),andα_(L)=9.14(5)μK^(−1),*** dilation along the c-ax.s was mainly dominated by out-plane V-P bonds be-tween layered *** to the pressure-dependent lattice parameters,the polycrystalline bulk modulus(B_(0)=185(9)GPa)and high compressibility anisotropy factor(B_(a)/B_(c)=1.64)was ***-while,the second-order elastic constants were calculated,and the elastic moduli,E=303 GPa,B=198 GPa,G=122 GPa,andν=0.246,were *** the weak connection between layer slabs by out-plane V1-P bond was revealed by the bond stiffness model,with a bond stiffness close to the M-A bond in MAx.***,good damage tolerance capability was predicted according to Paugh’s ratio(G/B=0.616)and Cauchy pressure(P_(a)=0 GPa,P_(c)=-7.5 GPa),even better than those of typical MAx.*** discovery of V_(8)P_(6)C provides a new member of MAx.phase-like damage-tolerant ceramic with relatively low density,moderate thermal ex.ansion,and anisotropic compressibility,and the unique lay-ered structure is inspiring for ex.loring new layered ternary ceramics.

关键词： New ternary carbide MAx.phase Thermal ex.ansion Elastic constants Anisotropy

Spalling characteristics of high-temperature treated granitic rock at different strain rates

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1280-1288页

作者： L.F.Fan Q.H.yang x.L.Du The Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education Beijing University of TechnologyBeijing100124China

The dynamic spalling characteristics of rock are important for stability analysis in rock *** paper presented an ex.erimental investigation on the dynamic spalling characteristics of granite with different temperatures and strain rates.A series of dynamic spalling tests with different impact velocities were conducted on thermally treated granite at different *** dynamic spalling strengths of granite with different temperatures and strain rates were determined.A model was proposed to correlate the dynamic spalling strength of granite,high temperature and strain *** results show that the spalling strength of granite decreases with increasing ***,the spalling strength of granite with a higher strain rate is larger than that with a lower strain *** proposed model can describe the relationship among dynamic spalling strength of granite,high temperature and strain rate.

关键词： Dynamic spalling characteristics High temperature Strain rate Dynamic loading Granite

Uncovering the hierarchical clusters in the heat-affected zone of an electron beam weldedα/βtitanium alloy joint

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Journal of Materials Science & Technology 2024年第7期174卷 120-132页

作者： C.x. x.H.Shao H.J.yang M.Lv H.Q.Liu x.L.Ma Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of Materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China Suzhou laboratory Suzhou 215028China Department of Mechanical Engineering Kyushu UniversityFukuoka 819-0395Japan Bay Area Center for Electron Microscopy Songshan Lake Materials LaboratoryDongguan 523808China

Using high-resolution transmission Kikuchi diffraction(TKD)and transmission electron microscopy(TEM),we ex.mined the hierarchical clusters that form in situ in the heat-affected zone(HAZ),which are com-monly referred to as“ghost”structures,of bimodal titanium alloy Ti-5Al-2Sn-2Zr-4Mo-4Cr(wt%,TC17).The ghost structures are enriched with Al elements but poor in Mo and Cr compared to the surroundingβ*** results show that the ghost structure in middle-HAZ mainly consists ofα_(L)laths with a high-angle grain boundary,which ex.ibits the classic Burgers orientation relationship(BOR)with the host matrix.while it encircles theα_(P)grains in *** the ghost structure is evidenced to form via in-complete martensitic *** results further confirm that the ghost structure is composed ofαL and tinyβ_(L)laths with BOR,with the former being enriched with Al and poor with Cr and Mo,while the latter is the ***,twoα_(L)variant clusters with a check-mark morphology are fre-quently observed viewed along[0001]_(αL)//[110]_(βL)directions,which are dominated by the crystallographic and geometrical relationships betweenαandβ*** on the microstructural characterization,it is hypothesized that the ghost structure is transformed from the initialα_(P)phase,due to the coupling ef-fect of high thermal stress(which induces the formation of a large number of dislocations)and element diffusion caused by sudden temperature increase and plunge cooling in the HAZ during the welding pro-cess.

关键词： TC17 titanium alloy Electron beam welding(EBW) The ghost structure Transmission Kikuchi diffraction(TKD) Transmission electron microscopy(TEM)

Generation of electrostatic waves in the regions of quasi-parallel shocks

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Generation of electrostatic waves in the regions of quasi-pa...