加工中心MTBF值的点估计与区间估计

应用基于截尾数据的似然函数理论和Weibull分布下的似然比方法,对加工中心有替换定时截尾试验数据分别进行了加工中心平均故障时间间隔(MTBF)值的点估计与区间估计。根据似然函数的重要引理,用迭代方法进行了Weibull模型两个参数的区间估计,并进行了MTBF值的区间估计。本研究解决了加工中心可靠性评估工作中的难题。     

关于"四信"问题的调查分析--基本群众的"四信"状况

改革开放所带来的政治观念的变化集中地体现在人们的“四信”观上。调查表明,当前人们的“四信”观总体情况是好的,但相对而言,对马克思主义的信仰以及对党和政府的信任较弱。增强“四信”观,重在严惩腐败和培养科学的认知方法。     

对幼儿教育工作的思索

为幼儿创造健康良好成长环境,教师发挥着决定性的作用,作为一名幼儿教师应当具备童心、爱心、信心、决心、开心等基本素质,调整好心态,搞好工作,才能符合社会发展的需要,不辜负人类灵魂的工程师这一美誉。     

关联规则挖掘算法的改进与研究

在Apriori算法的基础上,提出由候选集快速产生强项集的算法：采用动态分配存储空间合理分配内存,将数据库中的数量相关问题转换成逻辑相关问题,给出计算长度k的强项集存储分配公式,由候选（k＋1）一项集的集合Gk＋1,产生（k＋1）-项强项集来表达关联规则．     

Summary Intervals for Model-Based Classification Accuracy and Consistency Indices

When scores are used to make decisions about respondents, it is of interest to estimate classification accuracy (CA), the probability of making a correct decision, and classification consistency (CC), the probability of making the same decision across two parallel administrations of the measure. Model-based estimates of CA and CC computed from the linear factor model have been recently proposed, but parameter uncertainty of the CA and CC indices has not been investigated. This article demonstrates how to estimate percentile bootstrap confidence intervals and Bayesian credible intervals for CA and CC indices, which have the added benefit of incorporating the sampling variability of the parameters of the linear factor model to summary intervals. Results from a small simulation study suggest that percentile bootstrap confidence intervals have appropriate confidence interval coverage, although displaying a small negative bias. However, Bayesian credible intervals with diffused priors have poor interval coverage, but their coverage improves once empirical, weakly informative priors are used. The procedures are illustrated by estimating CA and CC indices from a measure used to identify individuals low on mindfulness for a hypothetical intervention, and R code is provided to facilitate the implementation of the procedures.     

商事登记公信力研究

以外观主义保护交易安全的需求、行政行为公定力理论及行政信赖保护原则是商事登记公信力得以承认的基础;商事登记事项一经登记,即推定合法、准确、有效,善意第三人根据其所为的行为,应当有效,即使该登记存在瑕疵;登记公信力对信赖登记的善意第三人形成了有力保护;我国对公信力全然未予规定,相关立法亟待补白。     

抗疫斗争背景下提升大学生文化自信的实现路径

中国在抗击新冠肺炎疫情的斗争中取得了重大战略成果,充分彰显了中华文化的价值与魅力,这为提升大学生文化自信带来了重要机遇.而结合抗疫背景,采取为大学生对比中西抗疫实践及成效,讲好中国抗疫故事,阐明伟大"抗疫精神",将抗疫内容融入高校思政课,推进思政课创新,是可以有效提升大学生文化自信的现实路径.     

Bilingualism in minority settings in Canada: Integration or assimilation?

This study explores social psychological correlates of bilingualism in the Canadian context. First, it investigates the relation between language confidence and identity as moderated by ethnolinguistic vitality. Second, it examines whether bilinguals can be distinguished from predominantly unilingual participants on subjective vitality and language usage and evaluates the impact of ethnolinguistic vitality on these differences. Data from Statistics Canada collected among minority Francophones outside of Quebec and minority Anglophones in Quebec (N = 7377) were used for analysis. The results show that language confidence is significantly related to levels of identity for all regions. Bilinguals are significantly distinct from predominantly monolingual participants on most factors for maintenance of identity. However, among all Francophone samples, bilinguals most resemble the French-dominant participants.     

学术金字塔中的“她力量”：高校工科 女性教师科研自我效能感研究

高校女性教师是科技人才队伍的重要组成部分，是我国科技事业十分重要的力量，然而这一群体仍面临着人数较少、职业发展遭遇瓶颈、生育友好型环境有待提升等困境。研究基于科研自我效能感理论，运用混合研究方法，对上海6所高校204位工科女性教师开展问卷调查，并辅之以质性访谈，探索工科女性教师科研自我效能感现状及其影响因素。研究发现：工科女性教师的科研概念化能力、执行和汇报能力自我效能感水平相对较高；日均照顾子女和长辈的时间、对自身的领导能力和担任领导职位的自信程度等因素均对其科研自我效能感产生显著正向影响。基于上述结果，研究从国家和高校两个层面对工科女性教师人才的支持政策提出建议。     

Lessons from the famous 17th-century paradox of the Chevalier de Méré

We take advantage of a combinatorial misconception and the famous paradox of the Chevalier de Méré to present the multiplication rule for independent events; the principle of inclusion and exclusion in the presence of disjoint events; the median of a discrete-type random variable, and a confidence interval for a large sample. Moreover, we pay tribute to our original bibliographic sources by providing two computational tools to facilitate the students' insights on these topics.