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两点相关函数、关联分维及IRAS星系大尺度分布的典型尺度

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天体物理学报 1994年第2期14卷 109-117页

作者：刘滨夏晓阳邓祖淦刘永镇中国科技大学研究生院天津师范大学物理系中国科学院北京天文台

本文对两点相关函数及关联分维间的关系进行了讨论，以ＩＲＡＳ星系红移巡天样本作为例子进行分析，分析结果表明，在大尺度（≥１５─２０ｈＭｐｃ）上，ＩＲＡＳ星系的分布既不能用简单幂律形式的两点相关函数，也不能用简单分形来描... 详细信息

本文对两点相关函数及关联分维间的关系进行了讨论，以ＩＲＡＳ星系红移巡天样本作为例子进行分析，分析结果表明，在大尺度（≥１５─２０ｈＭｐｃ）上，ＩＲＡＳ星系的分布既不能用简单幂律形式的两点相关函数，也不能用简单分形来描写。它可以用多级分形来更好地描写。多级分形结构的主要特征之一是存在典型尺度，即相邻分形级间的转变尺度，用非归一计数方法可以有效而准确地确定这些典型尺度，存在典型尺度对目前已有的结构形成模型提出了挑战。

关键词：宇宙学 IRAS星系大尺度相关函数

Hankel Operators on Bergman Spaces of Annulus Induced by Regular Weights

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Acta Mathematica Sinica,English Series 2021年第5期37卷 775-804页

作者： Li Hong yang xiao Feng WANG Jin xia School of Mathematics and Information Science Guangzhou UniversityGuangzhou 510006P.R.China

This paper is devoted to studying Bergman spaces A_(ω_(1,2))^(p)(M)(1 详细信息

This paper is devoted to studying Bergman spaces A_(ω_(1,2))^(p)(M)(1

关键词： Hankel operators regular-weight annulus Bergman spaces

尿素包合法富集压榨松籽油中皮诺敛酸工艺优化

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食品与机械 2018年第8期34卷 183-188页

作者：刘志鑫刘志彬张根生岳晓霞杨慧铎许春明哈尔滨商业大学食品工程学院黑龙江哈尔滨150076

以压榨松籽油为原料,研究乙醇浓度、脂肪酸与尿素比、脂肪酸与乙醇比、包合时间、包合温度及包合次数对松籽油中皮诺敛酸的影响。在单因素试验的基础上,以皮诺敛酸含量和损失率的综合分为响应值,根据Box-Behnken中心组合试验设计原理,... 详细信息

以压榨松籽油为原料,研究乙醇浓度、脂肪酸与尿素比、脂肪酸与乙醇比、包合时间、包合温度及包合次数对松籽油中皮诺敛酸的影响。在单因素试验的基础上,以皮诺敛酸含量和损失率的综合分为响应值,根据Box-Behnken中心组合试验设计原理,进行优化试验设计,并建立皮诺敛酸的尿素包合回归模型。研究表明:脂肪酸:尿素=1:2. 88(g/g),脂肪酸:乙醇=1:7. 98 (g/mL),包合时间23. 44 h,包合温度4. 18℃,该条件下对皮诺敛酸进行二次包合,含量可由一次包合的39. 27%提高到53. 36%,皮诺敛酸损失率为17. 24%,综合分值为0. 954 3,综合评价指标最高。

关键词：皮诺敛酸松籽油尿素包合十八碳三烯酸

Power Optimization Strategy Considering Electric Vehicle in Home Energy Management System

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Journal of Electronic Science and Technology 2016年第3期14卷 234-241页

作者： Yu-xiao Huang Feng yang yang Luo Cheng-Long xia the School of Energy Science and Engineering University of Electronic Science and TechnologyChengdu 611731China the School of Automation Engineering University of Electronic Science and TechnologyChengdu 611731China

With the development of smart grid, residents have the opportunity to schedule their household appliances （HA） for the purpose of reducing electricity expenses and alleviating the pressure of the smart grid. In this paper, we introduce the structure of home energy management system （EMS） and then propose a power optimization strategy based on household load model and electric vehicle （EV） model for home power usage. In this strategy, the electric vehicles are charged when the price is low, and otherwise, are discharged. By adopting this combined system model under the time-of-use electricity price （TOUP）, the proposed scheduling strategy would effectively minimize the electricity cost and reduce the pressure of the smart grid at the same time. Finally, simulation experiments are carried out to show the feasibility of the proposed strategy. The results show that crossover genetic particle swarm optimization algorithm has better convergence properties than traditional particle swarm algorithm and better adaptability than genetic algorithm.

关键词： EMS smart grid scheduling space state of charge time-of-use electricity price vehicle-to-grid technology (V2G) technology.

Preparation of nano-TiO_2 photocatalysts and their decomposition activity in phenol-contaminated water

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第11期10卷 1651-1659页

作者： xiao-yuan JIANG Feng DU Chun-xia GUO Qiong yang xiao-ming ZHENG Institute of Catalysis Faculty of Science Zhejiang University Hangzhou 310028 China

ZiO2 was prepared by the hydrolyzation method in （NH4）2SO4-modified TiCl4 solution, and TiO2 photocatalysts were obtained by accelerating the precipitation of TiO2 powder in a high-temperature water bath. The photocatalysts were characterized by Brunauer-Emmett-Teller （BET）, X-ray diffraction （XRD）, Raman spectrum and UV-Vis （Ultraviolet-Visible） spectrometry techniques, and the photocatalytic activity in phenol-contaminated water was investigated. The results showed that photocatalysts calcined at 400 ℃ had a specific surface area of 138.2 m^2/g and an average particle size of 9 nm, and a significant increase in thermal stability of anatase phase. At the calcination temperature of 700 ~C, the crystal form of TiO2 started to change into rutile （anatase： 97%, rutile： 3%）. The activity of TiO2 photocatalysts prepared with （NH4）2SO4-modified TIC14 solution was markedly stronger than that without （NH4）2SOg-modified TIC14 solution. Maximal photocatalytic activity was observed at the mole ratio of Ti：（NH4）2SO4= 1：2, the water-bath temperature of 90℃ and the calcination temperature of 700 ℃.

关键词： Ammonium sulfate Titanium dioxide Photocatalysis reaction Phenol-contaminated water

The Characterization of Graphs with No 2-connected Spanning Subgraph of V_(8)as a Minor

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Acta Mathematicae Applicatae Sinica 2022年第4期38卷 902-915页

作者： xiao-min ZHOU xia-xia GUAN Cheng-fu QIN Wei-hua yang Department of Mathematics Taiyuan University of TechnologyTaiyuan 030000China School of Mathematical Sciences Xiamen UniversityXiamen 361005China School of Mathematics Science Guangxi Teachers Education UniversityNanning 530001China

It is difficult to characterize graphs which contain no a 2-connected graph as a minor in graph *** V_(8)be a graph constructed from an 8-cycle by connecting the antipodal *** are thirteen 2-connected spanning subgraphs of V_(8).In particular,one of them is obtained from the Petersen graph by deleting two vertices and it is also a hard problem to characterize Petersen-minor-free *** this paper,we characterize internally 4-connected graphs which contain a 2-connected spanning subgraph of V_(8)as a forbidden minor.

关键词： V_(8) internally 4-connected graph minor-free 2-connected subgraph

Oleuropein alleviates sepsis-induced acute lung injury via the AMPK/Nrf-2/HO-1 signaling

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Asian Pacific Journal of Tropical Biomedicine 2024年第5期14卷 187-198页

作者： Shan-Hu Wang yang-yang Wu xiao-Jiao xia Department of Pediatrics The Second Affiliated Hospital of Wenzhou Medical UniversityWenzhouZhejiang 325027China

Objective:To explore the effect of oleuropein on sepsis-induced acute lung injury(ALI)in vitro and in vivo and investigate the underlying ***:In an lipopolysaccharide(LPS)-mediated cell model of sepsis-induced ALI and a cecal ligation and puncture-induced mouse model of septic ALI,CCK-8 assay and flow cytometry analysis were used to detect cell activity and *** and relevant assay kits were used to measure the levels of inflammatory cytokines and oxidative stress,*** blot was applied to determine the expression of apoptosis-and AMP-activated protein kinase(AMPK)/nuclear factor erythroid 2-related factor-2(Nrf-2)/heme oxygenase-1(HO-1)signaling-associated ***-1 staining,adenosine triphosphate(ATP)assay kit,and MitoSOX Red assays were performed to detect mitochondrial membrane potential,ATP content,and mitochondrial ROS formation,***,lung injury was evaluated by measuring lung morphological alternations,lung wet-to-dry ratio,myeloperoxidase content,and total protein ***:Oleuropein reduced inflammatory reaction,oxidative damage,and apoptosis,and ameliorated mitochondrial dysfunction in LPS-exposed BEAS-2B cells and mice with septic ***,oleuropein activated the AMPK/Nrf-2/HO-1 signaling ***,these effects of oleuropein were abrogated by an AMPK inhibitor compound ***:Oleuropein can protect against sepsis-induced ALI in vitro and in vivo by activating the AMPK/Nrf-2/HO-1 signaling,which might be a potential therapeutic agent for the treatment of sepsis-induced ALI.

关键词： AMPK/Nrf-2/HO-1 signaling Inflammatory response Lung damage Mitochondrial dysfunction Oleuropein Oxidative stress Sepsis

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脉冲星演化的一种可能方式

Chinese Journal of Astronomy and Astrophysics 1982年第1期 35-43页

作者：乔国俊吴鑫基夏晓阳北京大学地球物理系

通常假定垂直磁偶极矩在其旋转频率上的辐射Wd是所有脉冲星制动的唯一来源（我们称之为POG假定）.然而一些观测事实表明,这一点是值得怀疑的.本文在文[3]基础上,在不用POG假定的情况下,进一步讨论了“光柱”附近的电磁制动作用. 我们得... 详细信息

通常假定垂直磁偶极矩在其旋转频率上的辐射Wd是所有脉冲星制动的唯一来源（我们称之为POG假定）.然而一些观测事实表明,这一点是值得怀疑的.本文在文[3]基础上,在不用POG假定的情况下,进一步讨论了“光柱”附近的电磁制动作用. 我们得到“光柱”附近电磁制动的理论关系是:制动力矩产生的功率Wem∝P-3.2,当高频电磁辐射（从射电到r波段）的总功率Lt与Wem成正比时,有Lt∝P（-3.2）（P为脉冲周期）.我们对15个脉冲星所作的总光度Lt与Pn的统计结果是:n=-3.1,相关系数R=-0.83,与理论要求一致.表明对于这些脉冲星这种制动机制与辐射之间的联系是可以肯定的. 从观测出发我们所作的分析表明,Wem在一些情况下是重要的,对部分脉冲星它的作用是主要的.然而一般情况下,尚不能断定. Wd的作用为主时的演化途径与Wem的作用为主时的演化途径[图（2）]完全不同,不同的脉冲星,或同一脉冲星的不同演化阶段上,两种制动机制所起的作用可有所不同,因而实际的演化过程可能是两种作用的综合结果[图（3）]. Ferguson（1979）注意到80多颗脉冲星的P～P图上可能存在着P≈2ns的“gap”,我们对199个脉冲星所作的P～P图上仍然存在这一“gap”,表明这个“gap”可能确实是存在的. 如果上述“gap”属实,按照本文的制动机制可以合?

关键词：脉冲星旋转频率磁偶极矩乔国俊恒星射电光度射电辐射可能方式

脉冲星某些重要参数的估计和RS模型空心辐射锥理论的观测比对

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天文学报 1985年第1期 69-75页

作者：吴鑫基乔国俊夏晓阳北京大学地球物理系天体物理专业

本文根据极冠模型的几何关系,由线偏振位置角和视束宽等独立的观测量给出了辐射锥角的上限β上和标志视线从辐射锥哪个部位扫过的参量Q（,θ为视线和自转轴的交角,ψ为磁倾角）。采用Jones的计算磁倾角ψ的公式后,可以得到每颗脉冲星的... 详细信息

本文根据极冠模型的几何关系,由线偏振位置角和视束宽等独立的观测量给出了辐射锥角的上限β上和标志视线从辐射锥哪个部位扫过的参量Q（,θ为视线和自转轴的交角,ψ为磁倾角）。采用Jones的计算磁倾角ψ的公式后,可以得到每颗脉冲星的辐射锥角β观及其和周期P的统计关系(β观=7.1 P-0.67)。和RS模型的辐射锥角公式相比,有89%的脉冲星βRS>β上,100%的脉冲星βRS>β观。这表明βRS仅能理解为在RS模型的理论框架下的最大可能的辐射锥角,真实的辐射锥角则远比它要小。根据Q值和脉冲的形状检验了RS模型空心锥理论,发现和观测基本符合。

关键词：脉冲星辐射锥角几何关系观测量极冠模型磁倾角地磁要素 RS 重要参数