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Fabrication of atomically smooth SrRuO_3 thin films by laser molecular beam epitaxy

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Science china.Physics,Mechanics & Astronomy) 2008年第7期51卷 745-749页

作者： LIU GuoZhen1, HE Meng1, JIN KuiJuan1, YANG GuoZhen1, Lü HuiBin1, ZHAO Kun2, ZHENG ShiJian3 & MA XiuLiang3 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100080, china.2 department of mathematics and Physics, china.university of Petroleum, Beijing 102249, china.3 Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, china 1. Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100080 China 2. department of mathematics and Physics China University of Petroleum Beijing 102249 China 3. Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

High-quality SrRuO3 (SRO) thin films and SrTiO3/SRO bilayer were grown epitaxially on SrTiO3 (STO)(001) substrates by laser molecular beam epitaxy. The results of in situ observation of reflection high-energy electron diffraction and ex situ X-ray diffraction θ -2θ scan indicate that the SRO thin films have good crystallinity. The measurements of atomic force microscopy and scan tunneling microscopy reveal that the surface of the SRO thin film is atomically smooth. The resistivity of the SRO thin film is 300 μΩ·cm at room temperature. Furthermore, the transmission electron microscopy study shows that the interfaces of STO/SRO and SRO/STO are very clear and no interfacial reaction layer was observed. The experimental results show that the SRO thin film is an excellent electrode material for devices based on perovskite oxide materials.

关键词： SrRuO3 thin film laser molecular beam epitaxy surface morphology

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ON A PROBLEM OF ***'S

Chinese Science Bulletin 1982年第5期27卷 571-572页

作者：施咸亮 hangzhou university

Let f（x）=sum from k=0 to ∞（ax（f）） cos kx+bx（f） sin kx L2（0, 2π） and write dk（f）=（ak2（f）+bk2（f））1/2, k=0, 1, 2, …. Denote by （?）n, the set of the step-functions on (0,2π] with n equidistant node... 详细信息

关键词： Approximation write 二土二万

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诱导引力理论中的Baby宇宙

高能物理与核物理 1989年第12期13卷 1071-1078页

作者：高怡泓高洪波中国科学技术大学近代物理系浙江大学物理系

本文讨论诱导引力理论中Baby宇宙的量子效应.我们证明了在诱导引力理论中Baby-Parent宇宙相互作用是非定域的,并论证了在低能极限下诱导的宇宙学常数为零.这一论证并不依赖于诱导势的细节.

关键词：诱导引力理论 Baby宇宙量子效应

The Symplectic Floer Homology of the Square Knot and Granny Knots

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Acta Mathematica Sinica,English Series 1999年第1期15卷 1-10页

作者： Weiping Lidepartment of mathematics,Oklahoma State university,Stillwater,Oklahoma 74078-0613,USA department of mathematics Oklahoma State University Stillwater USA

Using a kind of Mayer-Vietoris principle for the symplectic Floer homology of knots,we compute the symplectic Floer homology of the square knot and granny knots.

关键词： Knot Knot Cobordism Maslov Index Floer Homology

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教师成长中的“技能”及其超越

教育发展研究 2011年第4期31卷 48-53页

作者：步社民浙江师范大学杭州幼儿师范学院副院长教授杭州310012

本文从教育史角度梳理了对教师技能由无意识、推崇至质疑和反思的历程;从教育制度层面、课程标准层面、教师专业标准层面论证了教师技能的不可或缺;从技能需要思想引领、技能发挥需要智慧、技能需要上升到艺术等三个维度分析了教师成长... 详细信息

本文从教育史角度梳理了对教师技能由无意识、推崇至质疑和反思的历程;从教育制度层面、课程标准层面、教师专业标准层面论证了教师技能的不可或缺;从技能需要思想引领、技能发挥需要智慧、技能需要上升到艺术等三个维度分析了教师成长中超越技能的必要性。

关键词：教师成长技能超越技能

Pranlukast reduces neuronal death in the hippocampal CA1 sector induced by four- vessel occlusion in rats

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Pranlukast reduces neuronal death in the hippocampal CA1 sec...

Jackknifed random weighting for Cox proportional hazards model

中国药理学会第十次全国学术会议

作者： ZHANG Li-hui~1,ZHAO Jian-bo~1,CHEN Wen-jian~1, YUAN Hui-ning~1,HU Quan~1,LIN Xiao-xia~1,FANG Zhi-ming~1,WEI Er-qing~2 (1.department of Pharmacology,School of Basic Medicine,hangzhou Normal university,hangzhou 310036,china.2.department of Pharmacology,School of Medicine,Zhejiang university,hangzhou 310058,china.

Pranlukast(ONO-1078) is a selective cysteinyl leukotriene receptor 1(CysLT1) ***, we have reported the protective efficacy of pranlukast on global cerebral ischemia in *** present study further evaluated dose-and time-dependent properties of pranlukast on delayed neuronal death of hippocampal CA1 neurons following transient global ischemia in rats and determined whether the effect of pranlukast is long *** ischemia was induced by an improved four-vessel occlusion(4-VO model) in ***(0.03,0.1 and 0.3 mg·kg) was injected intraperitoneally either as multiple doses or as a single dose,*** variables were monitored and neuron count was measured by computer-assisted *** transient global ischemia in rats causes selective and delayed neuronal death in the hippocampal CA1 *** were no significant differences in blood pressure,arterial blood pH,PO,PCO and blood glucose pre-ischemia and post-ischemia among the ***1 receptor antagonist pranlukast(0.1 and 0.3 mg·kg,30 min before ischemia and 1, 24,48 and 72 h after ischemia) markedly reduced hippocampal neuronal damage(P<0.01).Treatment with a single dose of pranlukast(0.1 mg·kg,30 min before ischemia) also resulted in a significant increase in the number of healthy CA1 neurons at 3 days after ischemia(P<0.05).Of interest is the finding that pranlukast(0.1 mg·kg) rescued CA1 pyramidal neurons from ischemic death even when treatment was delayed until 30 min or 1 h after ischemia(P<0.01 and P<0.05).Neuroprotective effect of pranlukast(0.1 mg·kg,7 consecutive days) is still evident 28 days after the ischemia episode,providing the experimental evident that CysLT1 receptor antagonists confer a long lasting *** present study confirms pranlukast has a dose-and time-dependent, and a long-lasting cerebroprotective effects on CA1 neuron loss following transient global ischemia in rats.

关键词： pranlukast cerebral ischemia delayed neuronal death hippocampal CA1 sector four-vessel occlusion neuroprotection

来源： cnki会议评论

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Science china.mathematics 2012年第4期55卷 775-786页

作者： LI Xiao 1 ,WU YaoHua 2,& TU DongSheng 1 1 Cancer Research Institute,Queen’s university,Kingston,Ontario K 7L 3N6,Canada 2 department of Finance and Statistics,university of Science and Technology of china.Hefei 230026,china 1. Cancer Research Institute Queen’s University Kingston Ontario K7L 3N6 Canada2. Department of Finance and Statistics University of Science and Technology of China Hefei 230026 China

The Cox proportional hazards model is the most used statistical model in the analysis of survival time ***,a random weighting method was proposed to approximate the distribution of the maximum partial likelihood estimate for the regression coefficient in the Cox *** method was shown not as sensitive to heavy censoring as the bootstrap method in simulation studies but it may not be second-order accurate as was shown for the bootstrap *** this paper,we propose an alternative random weighting method based on one-step linear jackknife pseudo values and prove the second accuracy of the proposed *** Carlo simulations are also performed to evaluate the proposed method for fixed sample sizes.

关键词： Cox proportional hazards model jackknife random weighting second-order accuracy simulations survival data

Caffeic acid ameliorates early and delayed brain injuries after focal cerebral ischemia in rats

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Acta Pharmacologica Sinica 2006年第9期27卷 1103-1110页

作者： Yu ZHOU San-hua FANG Yi-lu YE Li-sheng CHU Wei-ping ZHANG Meng-ling WANG Er-qing WEI~2 department of Pharmacology,School of Medicine,Zhejiang university,hangzhou 310031,china departmentofPharmacologySchoolofMedicine ZhejiangUniversityHangzhou310031China

Aim:To investigate the effects of caffeic acid on early and delayed injuries afterfocal cerebral ischemia in rats,and the possible relation to ***:Transient focal cerebral ischernia was induced by middlecerebral artery occlusion in Sprague-Dawley *** acid(10 and 50 mg/kg)was ip injected for 5 d after *** brain injuries were observed,and thelevels of cysteinyl leukotrienes and leukotriene B4in the brain tissue ***:Caffeic acid(50 mg/kg)ameliorated neurological dysfunctionand neuron loss,and decreased infarct volume 24 h after ischemia;it attenuatedbrain atrophy,infarct volume,and particularly astrocyte proliferation 14 d *** addition,it reduced the production of leukotrienes(5-lipoxygenasemetabolites)in the ischemic hemispheres 3 h and 7 d after ***:Caffeic acid has protective effect on both early and delayed injuries after focalcerebral ischemia in rats;and this effect may partly relate to 5-lipoxygenaseinhibition.

关键词： caffeic acid focal cerebral ischemia neuron astrocyte 5-lipoxygenase leukotriene

Ultrastructural Study of Human Lymphatic Drainage Units

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解剖学报 1991年第4期 446-446页

作者： (Li Jicheng, Yu Shoumin, department of Histology and Embryology, Zhejiang Medical university, hangzhou),

Lymphatic drainage units （LDU） may take up fluid, ceils and particles from the peritoneal cavity. The object of this study is to elucidate the ultrastructure of human LDU with ODO （OsO4-DMSO-OsO4） freeze fracture of SEM and TEM. LDU located between the peritoneal stomata and lymphatic lacunae, are composed of three components: the cuboidal cells, the endothelial cells of lacunae, and intervening connective tissue. All these three structures abut each other but are not linked by junctional specializations. The cuboidal cells often extend

关键词： Ultrastructural Study of Human Lymphatic Drainage Units