屏蔽二进序列偶的构造

对屏蔽二进序列偶进行研究,证明了一类特殊的差集偶与最佳屏蔽二进序列偶是等价的,以及另一类特殊的差集偶与伪随机屏蔽二进序列偶是等价的;证明了几乎最佳屏蔽二进序列偶与一类特殊的可分差集偶之间的等价关系,为应用差集偶和可分差集偶构造屏蔽二进序列偶提供了理论依据。利用分圆类方法构造与最佳屏蔽二进序列偶等价的差集偶,得到几类最佳屏蔽二进序列偶。     

Measures used in assessing outcomes of school‐wide positive behaviour support

School‐Wide Positive Behaviour Support (SWPBS) is increasingly becoming a popular approach to managing challenging behaviour in schools. However, several issues still have to be addressed facilitate successful implementation of this approach in schools. One of these issues pertains to the appropriateness of the different measures used to determine the efficacy of the approach. Because many schools are using indirect measures to assess the effects of SWPBS implementation, determining which measures more accurately reflect the effectiveness of the SWPBS components may increase the effectiveness of school measurement systems. The purpose of this study was to examine the measures used in evaluating the efficacy of positive behaviour support. The paper discusses the strengths and weaknesses of outcome measures regarding problem behaviour, prosocial behaviour, and implementation fidelity.     

The relationship of melatonin concentration in preterm infants and adverse outcomes in the late neonatal period

IntroductionThe aim of research was to assess the melatonin concentrations in the early neonatal period as a predictor of adverse outcomes of late neonatal period in preterm infants and to estimate its optimal predictive cut-off values.Materials and methodsA total of 115 preterm infants admitted to the neonatal intensive care unit were screened for eligibility, five did not meet the criteria, six parents declined the participation. So, a total of 104 preterm infants with gestational age 25-34 weeks were included in research. The concentration of melatonin in urine was determined by the Enzyme Immunoassay method (Human Melatonin Sulfate ELISA kit, Elabscience, China). The Mann-Whitney U-test and analysis of the receiver operating characteristic (ROC) curve were used in statistical analysis.ResultsAnalysis of the ROC curves has revealed optimal cut-off values for urinary melatonin concentration to predict late outcomes. Melatonin concentration below 3.58 ng/ml with sensitivity of 72% can predict development of retinopathy of prematurity (ROP) (AUC = 0.73; 95% confidence intervals (CI) 0.61-0.86). Good diagnostic accuracy (AUC = 0.80; 95% CI 0.67-0.93) has been shown for bronchopulmonary dysplasia (BPD). The optimal cut-off value for melatonin concentration in BPD prediction is 3.71 ng/ml (sensitivity 80%, specificity 64%). Urinary melatonin concentration below 3.79 ng/ml can be associated with late-onset sepsis (AUC = 0.76; 95% CI 0.64-0.87; sensitivity 72%; specificity 62%). There were no significant associations between melatonin concentration and necrotizing enterocolitis (P = 0.912).ConclusionUrinary melatonin concentration below the certain cut-off values in the early neonatal period may serve as one of the predictors of adverse outcomes such as BPD, ROP, and late-onset sepsis in the late neonatal period in preterm infants.     

不具传递性偏好的效用函数表示

主要是对参与人的被选方案集作些规定以及不具传递性的偏好作一些限制,得到了一些效用函数表示结果,统一和推广了许多已知结果。     

The Computerization of Career Services: Critical Issues to Consider

Increasingly, career centers on university and college campuses are making use of the World Wide Web to help their users with a myriad of career related needs. This technological service delivery mode has many advantages that will be briefly reviewed in this article. As well, a computer emphasis has the potential for drastically changing career centers as we know them: their traffic patterns, staffing needs, resource procurement, and perhaps most importantly, their outcomes in the lives of the students who make use of them. This article discusses these changes and through a review of seven critical issues, challenges the reader to closely examine the implications for technology within their own career centers.     

The validity of student ratings of teaching quality: Factorial structure,comparability, and the relation to achievement

Student ratings are widely used to assess teaching quality in primary and secondary education. This necessitates a thorough examination their validity and reliability in such contexts. To this end, we present validity evidence for using student ratings of teaching quality based on their factorial structure, comparability across grades and subjects, and relation to achievement. Based on data from the 2019 Trends in Mathematics and Science Study (TIMSS) and its national extensions in Norway (N = 3951 5th graders and N = 4575 9th graders), we could confirm a theoretically assumed three-dimensional factor structure (i.e., classroom management, cognitive activation, and supportive climate). Moreover, classroom management and supportive climate were more comparable across grades and subjects then cognitive activation. Finally, classroom management was associated with achievement across all groups, whereas other dimensions showed mixed results, especially across grades. Overall, the findings indicate that students, especially in Grade 9, can provide a valid assessment of teaching quality.     

浅析对社会结构理论的认识

社会结构是众多社会学家们研究关注的中心,但结构的概念仍只是被含糊地理论化,结构分析也百家争鸣。早期社会学家们在社会结构层面上对社会关系的解析,个人与社会,自由与秩序,行动与结构等二元关系始终成为他们研究的基本出发点,也是论战的焦点。在“后帕森斯”时代,社会学家们希望社会结构的概念能够脱离二元对立的困境和尴尬,最终走向综合。进入后结构主义时代后,后结构主义者认为二元对立已经消失,社会结构应走向彻底的“解构”。     

网络消费者初始信任的Logistic模型研究

假设网络消费者的感知、网络消费者的自我效能、网络消费者的个人信任倾向、企业地域特征、企业展示、社会暗示等6个因素是影响网络消费者初始信任的主要原因。在数据调研的基础上,构建网络消费者初始信任的Logistic模型,分析了各因素对网络消费者初始信任形成的影响和重要程度,研究结论可为更好地开展网络商务提供指导。     

翻译中的替补——兼评《论语》中术语“禮”的五种英译

德里达的替补策略认为原文与译文、各种译文之间以及译文和译者注之间不是一种二元对立,而都是一种平等互补的关系。通过讨论儒家术语＂禮＂的五种英译,分析了翻译中存在的各种替补关系。