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1.
In this paper, we consider a statistical estimation problem known as atomic deconvolution. Introduced in reliability, this model has a direct application when considering biological data produced by flow cytometers. From a statistical point of view, we aim at inferring the percentage of cells expressing the selected molecule and the probability distribution function associated with its fluorescence emission. We propose here an adaptive estimation procedure based on a previous deconvolution procedure introduced by Es, Gugushvili, and Spreij [(2008), ‘Deconvolution for an atomic distribution’, Electronic Journal of Statistics, 2, 265–297] and Gugushvili, Es, and Spreij [(2011), ‘Deconvolution for an atomic distribution: rates of convergence’, Journal of Nonparametric Statistics, 23, 1003–1029]. For both estimating the mixing parameter and the mixing density automatically, we use the Lepskii method based on the optimal choice of a bandwidth using a bias-variance decomposition. We then derive some convergence rates that are shown to be minimax optimal (up to some log terms) in Sobolev classes. Finally, we apply our algorithm on the simulated and real biological data. 相似文献
2.
《Social Development》2018,27(3):482-494
Emotional and behavioral maturity expectations increase as children transition to primary school; thus, maternal responses that support and encourage children's expression of negative emotion may not benefit school‐age children as much as preschoolers. The current study explored a change in the utility of these maternal responses among 187 families (62 5‐year‐olds, 75 6‐year‐olds, and 50 7‐year‐olds). Mothers reported on their responses to children's negative emotions and children's externalizing and internalizing behaviors at two time points over 1 year. Multiple group analysis within cross‐lagged path models revealed a positive association between non‐supportive maternal responses and later child externalizing behaviors among 5‐year‐olds. However, non‐supportive responses were related to decreases in externalizing behaviors among the 7‐year‐olds. Discrepant findings between the 5‐ and 7‐year‐olds may represent a developmental shift in the function of mothers' emotion socialization practices. 相似文献
3.
中国工农红军长征时期,党高度重视民族问题,制定和实施了一系列符合中国革命和民族实际的民族纲领政策,开创了一条运用马克思主义民族理论解决中国民族问题的探索之路。中国共产党早期的民族纲领与民族政策主张是从马克思列宁主义关于民族独立、民族分离、建立联邦或区域自治等方面去阐释。随着我国革命形势的发展变化,党已认识到民族独立或联邦制并不符合中国的国情,不主张民族自决和实行联邦制,并最终确认了在统一的国家中实行民族区域自治的政策。认真分析长征时期党民族理论政策的发展演变进程,对新时期科学总结党民族工作经验和指导民族工作实践,不断发展和完善中国特色社会主义民族理论体系,实现中华民族伟大复兴具有重要意义。 相似文献
4.
How does collective leadership within social networks resolve chronic and complex problems common to communities? Unfortunately, sometimes it does not, but when it does, the outcome may be truly extraordinary. We use a case study approach to explain how one Midwest community within the USA applied collective leadership within a community network to reduce teen births. It took ten years of what many identified as provocative media campaigns and comprehensive sex education programs to reduce teen births by 65%, significantly exceeding the stated goal. Using Kotter's change model as a backdrop, powerful strategies and provocative creativity reveal courageous leadership within a social network of diverse people and organizations focused on improving the social well being of their community. 相似文献
5.
AbstractResearch has shown that the congruence of parenting styles with cultural values, rather than parenting styles alone, impacts child adjustment. This study examined if parents’ cultural values moderate the relationships between parenting styles and child outcomes across both an individualist culture (Australia) and a collectivist culture (Indonesia). Three hundred and eighty-seven parents of 2–10-year-old children from both countries reported their parenting styles, the importance of the collectivistic values (security, conformity, and tradition), and their child's emotion regulation and behavioral problems. In both countries, authoritative parenting was associated with higher child emotion regulation and lower levels of behavioral problems, and authoritarian parenting was associated with lower child emotion regulation and higher levels of behavioral problems. Although cultural values did not moderate the relationship between authoritarian parenting and child adjustment, in both countries greater importance placed on tradition attenuated the positive effect of authoritative parenting on child outcomes. 相似文献
6.
薛小建 《盐城工学院学报(社会科学版)》2020,33(3):104-107
以校地合作、校企合作为发展战略的地方本科院校向应用型院校转变,已经成为一种潮流和趋势,而应用型教师的建设与培养更是迫在眉睫。在明确新时代高校应用型教师培养的必要性的基础上,从数量层面、结构层面、能力层面以及培训层面指出了培养过程中存在的问题,同时针对这些问题提出较为有效的应对策略。 相似文献
7.
摘 要:应用儿童长处与困难(SDQ)问卷(父母版),采用分层随机抽样方法,对惠州市1528名3-6岁儿童的情绪与行为问题进行调查。研究发现:惠州市3-6岁儿童情绪与行为问题异常情况比较严峻,儿童心理健康状况值得重视;不同地域、年龄学前儿童存在不同的情绪与行为问题,需要分类干预。其中农村儿童的情绪与行为问题异常情况尤为严重,需要得到广泛的关注和解决。 相似文献
8.
湖南实施乡村振兴战略面临的主要问题是:农村基础设施改善,但部分乡村旧貌未改;农田荒芜严重,土地流转不畅;种养收入低下,农产销售困难;农村二三产业发展迟缓,集体合作社模式短缺;文化设施缺乏,风俗习惯落后;老农依然辛劳,养老问题难解。带来这些问题的原因主要有:认识存在偏差,发展缺乏资金与人才,集体经济脆弱,干部责任意识不强,缺少产业支撑,乡风治理乏力。文章从实际出发,提出了一系列政策建议:转变思想观念,改变投资取向;改善乡村交通,加强基础设施;完善村居环境,实施“五改五化”;推动土地流转,培育二三产业;壮大集体经济,发展合作组织;强化党组织建设,重视选人用人。 相似文献
9.
幼儿园教师在提升学前教育质量上发挥着重要作用。随着学前教育事业的蓬勃发展,对幼儿园教师的需求量也随之 增加,但“虐童事件”的多次发生也引起社会各界对学前师资队伍建设的省思。幼儿园虽在招聘与选拔时严格把关,但依旧存 在准入门槛低且选拔方式单一,教师与应聘岗位契合度低,重艺术技能,轻文化知识的问题。对此,幼儿园在招聘与选拔时要 定位园所目标与文化,明晰用人标准,提高准入门槛;优化选拔方式,不断调整选拔测评结构,以此改善招聘与选拔中存在的问 题,促进幼儿园教师队伍建设。 相似文献
10.
近年来,从国外引进的新型教学模式“慕课”正在国内风行,虽然引入时间短,但很快引起了教育界极大的反响,并快速发展。慕课是一个新生事物,其发展完善还需要一个过程,在中国发展仍然存在一些问题亟需解决。对慕课在我国发展的现状和问题进行了阐述,并提出了相应的建议和对策。 相似文献