SO42-/ZrO2-Nd2O3固体酸的制备及其催化活性

以皮胶原纤维为模板剂,硫酸锆为锆源,掺杂稀土Nd元素制备SO42-/Zr O2-Nd2O3固体酸。通过TG、XRD、FT-IR、SEM以及N2吸附脱附分析等表征了制备条件对SO42-/Zr O2-Nd2O3固体酸结构的影响。结果表明,SO42-/Zr O2-Nd2O3固体酸较好地保持了模板的纤维结构,添加稀土Nd元素能有效抑制晶粒增长,Zr O2-Nd2O3晶粒尺寸为5.1~11.6 nm,比表面积为63.96 m2/g;以乙酸和正丁醇的酯化反应为模型反应考察SO42-/Zr O2-Nd2O3固体酸的催化活性,催化剂活性较高,重复使用5次,乙酸的转化率仍可达到85%,表现出较好的重复使用性,具有一定的工业应用前景。     

我国农村家庭养老存在的问题与对策

农村老年人的养老面临着养老意识淡漠、赡养权利保障不力以及孝道伦理弱化等方面的严峻挑战。解决农村养老问题需要国家、社会和家庭共同努力,构建以国家养老保障为主导、以家庭养老保障为主体、以社区养老保障为补充的多层次保障体系。从提高农村经济水平,完善法律、养老保险制度、探索社区养老模式以及和谐家庭关系等方面入手,综合治理,提高农村养老质量。     

存在哲学视野下女性生存状况探析简

对人的存在的认识是西方近代哲学的一个重要内容。文章从哲学框架中探寻文学作品中女性生命的历史沿革，从众多女性的遭际命运中提出作为“存在物”之一的女性应当具有“存在”意识，知性存在是生命的自觉，也是生命体存在的意义、价值所在。     

Noninformative priors for linear combinations of normal means with unequal variances

For normal populations with unequal variances, we develop matching priors and reference priors for a linear combination of the means. Here, we find three second-order matching priors: a highest posterior density (HPD) matching prior, a cumulative distribution function (CDF) matching prior, and a likelihood ratio (LR) matching prior. Furthermore, we show that the reference priors are all first-order matching priors, but that they do not satisfy the second-order matching criterion that establishes the symmetry and the unimodality of the posterior under the developed priors. The results of a simulation indicate that the second-order matching prior outperforms the reference priors in terms of matching the target coverage probabilities, in a frequentist sense. Finally, we compare the Bayesian credible intervals based on the developed priors with the confidence intervals derived from real data.     

Attachment Change in the Beginning Stages of Therapy: Examining Change Trajectories for Avoidance and Anxiety

The purpose of this study was to investigate the nature of self‐reported attachment change (avoidance and anxiety) in the context of six sessions of couple therapy designed to emphasize both therapist‐centered and couple‐centered (i.e., enactment‐based) clinical process during the beginning stages of therapy. A total of 48 couples with at least one partner who reported clinically significant relationship dissatisfaction participated in this study. Findings confirmed that some couples experience positive attachment‐related change (anxiety or avoidance), while also identifying a subset of individuals who may not experience optimal levels of attachment‐related change. In addition, findings point toward both differences and similarities between change trajectories for avoidance and anxiety. Finally, there was evidence that socio‐demographic factors may be associated with attachment change.     

Optimal split‐plot orthogonal arrays

It is well known that many industrial experiments have split‐plot structures. Compared to completely randomised experiments, split‐plot designs are more economical and thus have received much attention among researchers. Much work has been done for two‐level split‐plot designs. In this article, we consider split‐plot designs with factors of three, more than three, or mixed levels and with both qualitative and quantitative factors. We show that if two designs with both qualitative and quantitative factors are geometrically isomorphic, then their generalised wordlength patterns are identical. Three design scenarios are considered for optimal designs. The corresponding wordlength patterns are defined and the minimum aberration mixed‐level split‐plot designs having 18 and 36 runs are tabulated.     

简论改革浪潮中的文化建设

在新时期的改革浪潮中，社会主义文化建设随着时代的变化取得了辉煌的成就。文化建设尤其是在根本任务的发展、主要内容的丰富、基本取向及建设方针的演进等方面都体现出与新时期相适应的变化。     

清代中期的文人与广州花船

清代的广州是当时全国重要的对外通商口岸，繁荣的商业促进了娼妓业的发展。其中以具有岭南水乡特色的“花船”为代表，吸引了大量文人墨客前来光顾，留下了许多珍贵的笔记史料和文学作品，成为反映岭南社会风情的重要载体，对当时的民情风俗产生了重要影响。同时，文人的出现，促进了青楼文学艺术的发展，使清代广州的娼妓业发展到了一个新的阶段。事实证明，清代中期以后的广州花船，已经逐渐带有功利化色彩，深刻地改变了当时的青楼文化格局，成为展示社会风俗变迁的重要窗口。     

基于生态文明观的中西消费文化比较与建设启示

生态文明关系到人类社会发展与资源环境的可持续发展,也是近年国家政策和攸关民生的焦点。从生态文明观的视角来分析中西消费文化的不同,目的就是要通过分析中西方消费思想的保守性和开放性、消费情智的感性与理性、消费对象的物质性与精神性和消费理念的对立性与统一性的区别,对我国的消费文化提出落实顶层设计、加强政府监管、重构企业文化、加强公众生态教育等方面的建设性意见。