Ce0.5Zr0.5O2纳米多孔纤维的制备及其氧储存能力分析

利用干纺丝工艺，采用溶胶 凝胶法结合化学模板法制备了Ce0.5Zr0.5O2纳米多孔纤维，并在此基础上采用传统抄纸法制备了Ce0.5Zr0.5O2纤维纸。通过引入SiO2、TiO2和Al2O作为支撑体，利用XRD、低温N2吸附、拉曼光谱等手段分析了Ce0.5Zr0.5O2纳米多孔结构性能的变化。在空气条件下通过循环热失重分析法测定了材料在300~800 ℃温度范围内的氧储存能力，Ce0.5Zr0.5O2纳米多孔纤维的氧储存能力受到包括材料的比表面积、结晶程度以及支撑体性质等多方面因素的影响。     

MOMENT ESTIMATION IN THE CLASS OF BISEXUAL BRANCHING PROCESSES WITH POPULATION–SIZE DEPENDENT MATING

This paper concerns the estimation of the offspring mean vector, the covariance matrix and the growth rate in the class of bisexual branching processes with population‐size dependent mating. For the proposed estimators, some unconditional moments and some conditioned to non‐extinction are determined and asymptotic properties are established. Confidence intervals are obtained and, as illustration, a simulation example is given.     

新时期人民内部矛盾的特点、根源与方法

两类矛盾学说是毛泽东在20世纪50年代提出的,是他对马克思主义理论的新贡献。在今天社会主义现代化建设的新时期,人民内部矛盾的学说依然是适用的。只是对以往划分敌我矛盾与人民内部矛盾的旧标准可能需要有新的考虑。这不是本文要谈论的问题。我要讨论的是:人民内部矛盾在新时期的特点、根源和解决矛盾的方法。     

论排污权的法律属性

排污权是环境权这一"属权利"下的"种权利",环境权是一种丰富的人权,包括很多权利,排污权就是建立在环境权基础上的子权利或种权利;排污权具有产权性,属于物权中的用益物权;排污权具有法定性和权利义务统一性,各国法律都允许企业在法定限量内排放污染物,将排污权用许可证的方式确立下来,从而使其由"应有权利"转化为"实有权利"。     

Heavy or semi-heavy tail,that is the question

While there has been considerable research on the analysis of extreme values and outliers by using heavy-tailed distributions, little is known about the semi-heavy-tailed behaviors of data when there are a few suspicious outliers. To address the situation where data are skewed possessing semi-heavy tails, we introduce two new skewed distribution families of the hyperbolic secant with exciting properties. We extend the semi-heavy-tailedness property of data to a linear regression model. In particular, we investigate the asymptotic properties of the ML estimators of the regression parameters when the error term has a semi-heavy-tailed distribution. We conduct simulation studies comparing the ML estimators of the regression parameters under various assumptions for the distribution of the error term. We also provide three real examples to show the priority of the semi-heavy-tailedness of the error term comparing to heavy-tailedness. Online supplementary materials for this article are available. All the new proposed models in this work are implemented by the shs R package, which can be found on the GitHub webpage.     

英语同义词辨析的多维性及应用

英语中的同义词辨析不清是学生中普遍存在的问题,往往导致日常交际或书面表达的困惑或失误。本文将从语体、句法、搭配关系、语义和情感意义几个维度来探讨如何对英语同义词进行辨析,从而进一步探讨其在英语教学和学习中的应用。     

从词语的语义属性看语句的可接受性

语言可接受性判断是理论语言学和应用语言学的重要证据来源。语言可接受性判断涉及语法、语义、逻辑、文化、认知等相关知识。此外,语用、语境和文体等因素都可以作为评判语言可接受性的标准。本文从词语的语义属性判断语言的可接受性。具体地说,主要是从动词和形容词的动态/静态特征说明语句的可接受/不可接受形式。     

Development and validation of the Measure of Initial Attraction (MIA) / Elaboración y validación de la Medida de Atracción Inicial (MAI)

Unilateral Initial Attraction (UIA) is a first unilateral awareness towards an unknown person and can be the starting point of an interest in voluntarily initiating an interaction or relationship. In order to create a measure tapping this feeling, Study 1 asked individuals to indicate attributes characterizing UIA (Phase 1), and to rate their centrality (Phase 2). These were used to develop the Measure of Initial Attraction (MIA) comprising one component of arousal and another of unilateral interest. While the former is shared with the love construct, the latter differentiates from measures of passion. The MIA proved to be a valid and reliable instrument with the capacity to discriminate UIA across different relationships (Study 2) and targets (Study 3), with good convergent validity (Study 3). Results are discussed within the framework of personal relationships.     

超声波对椰奶中蛋白质功能性影响

研究超声波对椰奶中蛋白质的溶解度、持水性、乳化性、起泡性等功能性质的影响。结果表明超声波处理使溶解度增加约6%、持水性增加约26.7%、乳化能力提高约3.7%、泡沫体积提高约11.8%。pH为7,乳化能力提高近4.8倍。乳化能力随着蛋白质浓度的增加而增大。pH为5.0~8.0,超声波处理的样品有较好的起泡能力。