基于ANSYS的钢管混凝土拱桥吊杆二次张拉力确定

吊杆的张拉直接关系到系杆拱桥成桥后能否达到合理成桥状态,因此吊杆施工张拉力的确定是拱桥施工中的关键问题。首先运用正装迭代法模拟系杆拱桥吊杆的初张拉过程,得到施加二期恒载后各吊杆内力;然后运用影响矩阵法确定了吊杆二次张拉的控制力,以指导实际施工。基于大型分析软件ANSYS,提出了一种影响矩阵的简易求法。该方法概念明确,简单易行,对同类工程具有一定的参考价值。     

中国音乐文化产业的困境与出路

中国唱片业的快速缩水使链条结构的音乐文化产业陷入困境。基于盗版打击尤其是数字盗版打击的困难性与长期性,中国音乐文化产业等不起盗版尤其是数字盗版的有效遏制。世界唱片业销售额的增长与表演权收益所占收益总额中比例之间的正相当关系以及印度音乐文化产业成功的实际案例告诉我们,著作权法对录音制品二次使用的赋权是中国音乐文化产业的新出路。     

精致化纸浆模塑制品及关键制备工艺参数优化

为制备精致化纸浆模塑制品并研究关键加工工艺参数对其平滑度、光泽度的影响,以牛皮纸二次纤维为原料,在 全自动纸浆模塑机组上进行实际生产操作试验,用sPss软件进行极差分析和重复方差分析,对关键加工工艺参数进行 分析优化,得出较优的工艺参数为：打浆度25。SR、施胶剂用量1.5%、热压整型温度110℃和压力5 MPa。各参数影响 的主次顺序为：热压压力>打浆度>施胶剂用量>热压温度。研究表明提高热压压力,增加施胶剂用量,调节打浆度和 热压温度均可提高纸浆模塑制品的平滑度和光泽度     

基于市场营销课程的体验式教学方法的研究

体验式教学作为一种新的教学模式,对于中职学校市场营销课程教育具有积极的意义。在基于中职学校市场营销课程教学的实践基础上,分析了目前营销教学存在的问题、阐述了应开展体验式教学的理论依据和特征,论述了几种有效的体验式教学的应用方法,并指出实施体验式教学注意的问题。     

高校管理体制改革要正确处理校院关系

伴随着高等教育由精英教育转向大众教育,我国高校逐渐开始实行校院二级的管理模式.国内关于二级学院内涵等方面的研究和探索以及国外对高校管理体制等内容的探索是推进高校管理体制改革的珍贵财富.正确处理高校校院两级关系是加快进行高校管理体制改革的重要措施,其重点在于处理好校院两级的人权和事权、校院两级的财务和分配、院校两级教学科研关系等等.     

Cultural capital or relative risk aversion? Two mechanisms for educational inequality compared1

In this paper we empirically examined two explanatory mechanisms for educational inequality: cultural reproduction and relative risk aversion, using survey data taken from secondary school pupils in Amsterdam. Cultural reproduction theory seeks to explain class variations in schooling by cultural differences between social classes. Relative risk aversion theory argues that educational inequalities can be understood by between-class variation in the necessity of pursuing education at branching points in order to avoid downward mobility. We showed that class variations in early demonstrated ability are for a substantial part cultural: cultural capital - measured by parental involvement in highbrow culture - affected school performance at the primary and secondary level. However, relative risk aversion - operationalized by being concerned with downward mobility - strongly affects schooling ambitions, whereas cultural capital had no effect. Thus, we conclude that 'primary effects' of social origin on schooling outcomes are manifested through cultural capital and not through relative risk aversion (in addition to other potential sources of class variations such as genetics). Relative risk aversion, and not cultural capital, affects schooling ambitions, which is relevant for our understanding of secondary effects.     

An omnibus two-sample test for ranked-set sampling data

We develop an omnibus two-sample test for ranked-set sampling (RSS) data. The test statistic is the conditional probability of seeing the observed sequence of ranks in the combined sample, given the observed sequences within the separate samples. We compare the test to existing tests under perfect rankings, finding that it can outperform existing tests in terms of power, particularly when the set size is large. The test does not maintain its level under imperfect rankings. However, one can create a permutation version of the test that is comparable in power to the basic test under perfect rankings and also maintains its level under imperfect rankings. Both tests extend naturally to judgment post-stratification, unbalanced RSS, and even RSS with multiple set sizes. Interestingly, the tests have no simple random sampling analog.     

Hypothesis Testing of CNA Perceptions of Organizational Culture in Long Term Care

This commentary for the special issue on research that went wrong describes a study that explored factors that contribute to variability within Certified Nursing Assistants (CNAs) on organizational safety culture. We know from previous research that CNAs provide most direct care in nursing homes and that direct care workers often experience agency culture differently from agency management (Wolf et al., 2014). We were looking for factors that nursing homes could alter to improve the culture for CNAs, and thus, residents. We conducted a secondary analysis of data collected via a multi-component paper survey of CNAs employed in long term care. We used results from the Nursing Home Survey on Patient Safety Culture and primary shift, type of unit, and years as a CNA to identify modifiable characteristics that would explain variability in the perceptions of patient safety culture. The final sample included n = 106 from three nursing homes. Dimension scores were compared using bivariate tests appropriate to the scale and ordinal logistic regression. Despite support in the literature for the hypothesis, we found few significant differences on the total scale within groups. Differences in perceptions have implications for quality of care and the experiences of residents within nursing homes.