0-3岁婴幼儿早期教育的家长育儿需求调查——以陕西省为例

0—3岁婴幼儿早期教育是是当今社会关注的焦点之一,了解家庭的育儿需求能有效提高早教服务质量,优化婴幼儿生存环境,促进婴幼儿的健康发展。采用问卷法,从早教的模式、课程、目标等方面对陕西地区531名0-3岁婴幼儿家长的育儿需求调研发现,家长期望幼儿园附设早教班,以亲子课程为主要形式,关注早教的师资等方面。据此分析,可通过幼儿园附设早教班,与社区合作等建构0-3岁婴幼儿早期教育公共服务体系;通过家长需求导向,发掘社区本土资源等提高亲子课程的实效性;通过招募有育儿经验的志愿者,持双证上岗等加强早教的质量保障,进而建构适宜于该地区的0-3岁婴幼儿早期教育服务体系。     

3M公司创新管理及启示

创新是企业发展的灵魂,以创新而闻名的3M公司,非常注重企业创新文化的培养,其成功的创新管理实践与经验,为我国企业的创新管理提供了有益的启示.     

ABS树脂接枝结构的分析

本文报导了ABS树脂接枝结构的分析方法,主要是用O_sO_4—TBHP法将橡胶主干从双键处打断,从而得接枝AS,再测定它的分子量,并讨论了降解反应的最佳条件。     

A generalized drop-the-loser rule for multi-treatment clinical trials

Urn models are popular for response adaptive designs in clinical studies. Among different urn models, Ivanova's drop-the-loser rule is capable of producing superior adaptive treatment allocation schemes. Ivanova [2003. A play-the-winner-type urn model with reduced variability. Metrika 58, 1–13] obtained the asymptotic normality only for two treatments. Recently, Zhang et al. [2007. Generalized drop-the-loser urn for clinical trials with delayed responses. Statist. Sinica, in press] extended the drop-the-loser rule to tackle more general circumstances. However, their discussion is also limited to only two treatments. In this paper, the drop-the-loser rule is generalized to multi-treatment clinical trials, and delayed responses are allowed. Moreover, the rule can be used to target any desired pre-specified allocation proportion. Asymptotic properties, including strong consistency and asymptotic normality, are also established for general multi-treatment cases.     

Goodness-of-fit tests for exponentiality based on a loss-of-memory type functional equation

Three goodness-of-fit tests for exponentiality based on the functional equation characterization 1?F(2x)=[1?F(x)]² for every x?0 are proposed and shown to compare well to several popular tests against common alternative cdf's. Small-sample critical values for α=0.10,0.05 are developed for the two superior test statistics and the asymptotic null-distributions are characterized.     

On the influence curve for quantal bioassay

Influence curves are defined for estimators of the ED50 in quantal bioassay, assuming a symmetic tolerance distribution. A definition of influence-curve robustness is suggested. Influence curves are obtained for L-,M- and R-estimators, and their robustness is investigated. The influence curve of the logistic maximum likelihood estimator is studied.     

Numerical estimation of a probability measure

An iterative solution to the problem of maximizing a concave functional ø defined on the set of all probability measures on a topological space is considered. Convergence of this procedure and a rapidly converging algorithm are studied. Computational aspects of this algorithm along with the ones developed earlier by Wynn, Fedorov, Atwood, Wu and others are provided. Examples discussed are taken from the area of mixture likehoods and optimal experimental design.     

Symbolic Itô calculus in AXIOM: An ongoing story

Symbolic Itô calculus refers both to the implementation of Itô calculus in a computer algebra package and to its application. This article reports on progress in the implementation of Itô calculus in the powerful and innovative computer algebra package AXIOM, in the context of a decade of previous implementations and applications. It is shown how the elegant algebraic structure underlying the expressive and effective formalism of Itô calculus can be implemented directly in AXIOM using the package's programmable facilities for strong typing of computational objects. An application is given of the use of the implementation to provide calculations for a new proof, based on stochastic differentials, of the Mardia-Dryden distribution from statistical shape theory.     

按照"三个代表”要求加强高校党支部建设

从高校的地位、作用和新形势下高校党支部建设面临的新情况、新问题的角度阐明按照"三个代表”的要求加强高校党支部建设的重要意义,并依据"三个代表”的要求简要分析了高校党支部建设的努力方向.在此基础上,着重探讨了如何加强党支部建设的问题,认为应针对当前党支部建设面临的新情况,在思想建设、队伍建设、制度建设、开拓创新等几个方面采取强有力的措施,实践"三个代表”重要思想,使高校党支部更加稳固,更加适应新形势的要求,保持党的先进性.