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Asymptotic profile of solutions to the two-dimensional dissipative quasi-geostrophic equation

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Science China Mathematics 2010年第10期53卷 2733-2748页

作者： DONG BoQing & LIU QingQing School of Mathematical Sciences,anhui University,hefei 230039,China 1. School of Mathematical Sciences Anhui University Hefei 230039 China

This paper is concerned with the asymptotic behavior of the two-dimensional dissipative quasigeostrophic *** on the spectral decomposition of the Laplacian operator and iterative techniques,we obtain improved L2 decay rates of weak solutions and derive more explicit upper bounds of higher order derivatives of *** also prove the asymptotic stability of the subcritical quasi-geostrophic equation under large initial and external perturbations.

关键词： quasi-geostrophic equation L2 decay asymptotic stability

自体富血小板血浆通过Notch1调节骨质疏松大鼠骨折愈合

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中国骨质疏松杂志 2024年第2期30卷 181-186,209页

作者：沈灵杰秦超刘合飞南通市海门区人民医院手足外科江苏南通226100

目的探讨自体富血小板血浆(platelet-rich plasma,PRP)对骨质疏松症(osteoporosis,OP)大鼠骨折愈合的影响。方法取SD大鼠60只,按随机数字表法分为正常骨折组、模型组、PRP组、DAPT组(Notch通路抑制剂DAPT)、PRP+DAPT组,每组12只。正常... 详细信息

目的探讨自体富血小板血浆(platelet-rich plasma,PRP)对骨质疏松症(osteoporosis,OP)大鼠骨折愈合的影响。方法取SD大鼠60只,按随机数字表法分为正常骨折组、模型组、PRP组、DAPT组(Notch通路抑制剂DAPT)、PRP+DAPT组,每组12只。正常骨折组用右侧股骨干骨折髓内固定术建立骨折模型,其余各组大鼠采用维甲酸(70 mg/kg)灌胃+右侧股骨干骨折髓内固定术建立OP性骨折模型。PRP组制备自体PRP凝胶溶液,注射至骨折断端之间,DAPT组经尾静脉注射Notch通路抑制剂DAPT,PRP+DAPT组给予PRP的同时,尾静脉注射DAPT。各组给药6周后,用X线观察骨折愈合情况;显微CT(Micro-CT)法检测股骨骨密度、骨体积/总体积、骨小梁数量、骨小梁厚度变化;ELISA法检测血清骨钙素(OCN)、骨性碱性磷酸酶(BAP)、血小板源生长因子(PDGF)、转化生长因子-β(TGF-β)、胰岛素样生长因子1受体(IGF-1R)水平;碱性磷酸酶钙-钴法染色及抗酒石酸酸性磷酸酶(TRAP)染色法分别检测成骨细胞及破骨细胞数目;免疫组化法检测骨痂组织中Notch1阳性表达水平;Western Blot法检测骨痂组织中骨形态发生蛋白(BMP)、骨保护素(OPG)、核因子κB受体活化因子配体(RANKL)蛋白表达。结果与正常骨折组大鼠相比,OP性骨折模型大鼠骨痂形成较少,骨折愈合延迟,血清中成骨活性细胞因子分泌减少,骨体积、骨痂密度、骨小梁数量及厚度均减少,成骨细胞数目形成较少,破骨细胞数目形成较多,Notch1及其介导的BMP、OPG促成骨形成蛋白被抑制,破骨形成相关蛋白RANKL活性升高(P<0.05)。与模型组相比,PRP组可促进骨痂形成及骨愈合、促进成骨形成相关因子表达、激活Notch1,并使其介导的成骨形成途径激活、破骨形成途径减弱(P<0.05)。DAPT可阻断PRP的上述作用。结论自体PRP促进OP性骨折大鼠骨量增加及骨折愈合的作用,可能与促进Notch1通路激活有关。

关键词：自体富血小板血浆骨质疏松症骨折 Notch1通路

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安徽合肥滨湖新区租赁住房项目

建筑实践 2024年第3期 88-95页

作者： anhui Province Architectural Design and Research Institute Co., Ltd. 安徽省建筑设计研究总院股份有限公司

项目位于合肥市滨湖新区贵州路与遵义路交叉口,以自由寓、未来苑、天空城为设计主题,强调开放性、公共性,打造配套设施齐全、生活便利的生态住所;充分利用屋面空间,营造追寻自然、健康,及对美好生活向往的空中公园。为避免城市界面过于...

项目位于合肥市滨湖新区贵州路与遵义路交叉口,以自由寓、未来苑、天空城为设计主题,强调开放性、公共性,打造配套设施齐全、生活便利的生态住所;充分利用屋面空间,营造追寻自然、健康,及对美好生活向往的空中公园。为避免城市界面过于封闭呆板,采用两个体量相同、相互错动的居住组团,营造开放、活泼的城市界面;组团内住宅楼围合布置,形成安全、稳定的居住氛围;南北组团紧密联系,内外空间相互协调。配套设施位于两个组团底层,并顺应城市人流方向在西北角设置外街服务带,形成两环—带的布局模式,最大程度对外开放。利用北侧组团2层屋面打造空中跑道,满足健康生活的需求。

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A theoretical model of electrostatic ultrasonic transducers with micro air-gap structure

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Chinese Science Bulletin 1998年第9期43卷 728-731页

作者： GE Lifeng (GE Li-Feng) Department of Physics, anhui University, hefei 230039, China Department of Physics Anhui University Hefei China

A new plate-on-air-spring model (or called short tube or DK model) for modelling the behaviour of electrostatic air-coupled ultrasonic transducers is developed and verified by accurate predictions of natural frequenci... 详细信息

关键词： electrostatic ultrasonic transducer micro air-gap structure modelling.

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基于邻域粗糙集的偏标记特征选择

山东大学学报（理学版） 2024年第5期59卷 100-113页

作者：高贺飞李艳王硕河北大学数学与信息科学学院河北保定071002 北京师范大学珠海分校应用数学学院广东珠海519000

基于邻域粗糙集框架提出一种针对偏标记数据的特征选择方法,构建偏标记邻域决策系统,定义偏标记学习问题中邻域粗糙集的下近似和依赖度,建立适用于偏标记分类问题的特征选择算法。该算法能够在对特征空间进行邻域粒化的同时度量候选标... 详细信息

基于邻域粗糙集框架提出一种针对偏标记数据的特征选择方法,构建偏标记邻域决策系统,定义偏标记学习问题中邻域粗糙集的下近似和依赖度,建立适用于偏标记分类问题的特征选择算法。该算法能够在对特征空间进行邻域粒化的同时度量候选标记集合中标记间的相似程度,选出与标记信息相关性较强的特征子集。使用了2种不同于最常用随机方法的假阳性候选标记生成机制,在实验部分对不同偏标记生成机制进行分析和对比。最后给出了在6个真实偏标记数据集和6个受控单标记数据集上的大量实验对比结果,验证了所提特征选择方法的有效性。

关键词：偏标记学习特征选择偏标记邻域决策系统领域粗糙集

ASYMPTOTIC PROPERTIES OF L_1-NORM KERNEL ESTIMATOR OF THE CONDITIONAL MEDIAN

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Systems Science and Mathematical Sciences 1992年第1期5卷 55-69页

作者： HONG Shengyan (anhui University,hefei 230039,China)

Let（X,Y） be a pair of Rd×R1-valued random *** thispaper we investigate the asymptotic properties of the L1-norm kernel estimator ofthe conditional median function of Y on *** appropriate regularity condi-tions,asymptotic normality and the optimal rates of convergence n（-1）/（2+d）and(n-1log n)1/（2+d） in the Lq（1（?）q∞-norms restricted to a compactset,respectively,are *** study shows that this estimator and the well-known Nadaraya-Watson’s kernel estimator of the conditional mean function of Yon X have the same asymptotic properties.

关键词： L1-norm kernel estimator conditional median rate of convergence asymptotic normality

ANALYSISES OF GENE EFFECTS ON SOME COCOON CHARACTERS IN SILKWORM MORIL

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生物数学学报 1994年第4期9卷 10-17页

作者： Duan Jialong Zhu Jun (anhui Agricultulal University,hefei 230061,anhui)(Zhejia Agricultural Uuiversity,Hangzhou 310029,Zhejiang)

*** of genetic variance and covariance for individual characters showed that cocoon weight was controlled by both gene direct effect and maternal effect;Cocoon shell weight was controlled by gene direct effect mainly;Cocoon shell ratio was mainly due to maternal effect and se x-linked *** of genetic covariance components of each pair of ch aracters indicated that there were high significant positive relationships among most of genetic effects except maternal additive effect in cocoon weight and cocoon shell *** was a high positive relationship idirect effect between cocoon weight and cocoon shell ratio,but in cytop lasm effect and maternal effect were high negative relationships between *** there were high positive relationships in direct effect and maternal dominance between cocoon shell weight and cocoon shell *** of gene effects pointed out that sex-chromosome effects （Σi8=1Lii） on cocoon weight and cocoon shell weight both were lar ger positive values,that means cocoon weight and cocoon shell weight of females are generally higher than those of males in Silkworm. Standardized donmiance directions of direct effects on cocoon weight and cocoon shell weight were high positive values,but standardized domiance directieon of maternal effects on both of them were high negative values,it showed the two characters had larger heterosis in F1 generation and depressed in F2 ***-chromosome effect （Σi8=1Lii） on cocoon she11 ratio was high negative value,explaining that females usually have lower cocoon shell ratio than *** domiance directions of direct effect and maternal effect on cocoon shell ratio were not significant,predicting that the heterosis of cocoon shell ratio in F1 generation is not obvious comparing to cocoon weight and cocoon shell weight.

关键词： Silkworm Cocoon characters Genetical Analysis

Study on the Application of Gibberellin for the Spectrophotometric Determination of Arsenic,Phosphorus,Silicon and Germanium

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Chinese Chemical Letters 1997年第7期8卷 627-628页

作者： Yu Biao WANG(Department of Chemistry,anhui Instructive College,hefei 230061)Qian Rong LI(Structure Research Lab, University of Science and Technology ofChina,hefei 230026) anhui INSTRUCT COLL DEPT CHEMHEFEI 230061PEOPLES R CHINA UNIV SCI & TECHNOL CHINA STRUCT RES LABHEFEI 230026PEOPLES R CHINA

In the media of 0.66,0.96, 2. 16 and 0.54 mol/L ofH2SO4,the heteropoly acids of As,*** and Ge are separately reduced to corresponding heteropoly blues by gibberellin, which exhibit maxirnum absorptions at 835, 820, 810 and 805 nm with molar absorptivities of 2.64x104, 2.54x104 3.51x104 and 2.25x104 ***-1'cm-1 and linear ranges of 0-30,0-15,0-10 and 0-30 μg/25mL, The method was applied to the determinations of As, P and Si in alloyed steel.

关键词： Study on the Application of Gibberellin for the Spectrophotometric Determination of Arsenic Phosphorus Silicon and Germanium

ESTIMATE TO MUTATION RATES

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Science in China,Ser.B 1984年第9期27卷 936-946页

作者：刘垂玗 anhui Agricultural College hefei

The mathematical methods for estimationg the mutation rates of microbes at the level ofpopulations are given in this paper, which are concerned with the estimation of the mixtureof two normal distributions. Using the feed forward of livingthing’s prior information,the precision of the estimates may be increased and the calculation may be reduced. Finally,an approximate method about the small sample is given in this paper.

关键词： ESTIMATE TO MUTATION RATES