关于三个连续正整数平方和中的素数方幂

设x,n是正整数，p是素数。证明了：如果x^2 (x 1)^2 (x 2)^2=p^n，则必有n=1。     

单运放二重积分电路直流误差的分析

从理论上研究了单块集成运算放大器构成的正、负系数二重积分电路的设计,着重分析了这二类电路的直流误差,并给出了设计公式。     

加权亚半正定矩阵

讨论了加权亚半正定矩阵的充要条件、分解、特征值、行列式等性质．     

论中小学生积极心理的培养

积极心理学是当代心理学界兴起的一个新的研究领域，现在受到越来越多的人的关注。本文着重介绍了积极心理学的内涵及其基本取向，并在此基础上探讨了中小学生积极心理培养问题。     

Existence of solutions and positive solutions to a fourth-order two-point BVP with second derivative

Several existence theorems were established for a nonlinear fourth-order two-point boundary value problem with second derivative by using Leray-Schauder fixed point theorem, equivalent norm and technique on system of integral equations. The main conditions of our results are local. In other words, the existence of the solution can be determined by considering the "height" of the nonlinear term on a bounded set. This class of problems usually describes the equilibrium state of an elastic beam which is simply supported at both ends.     

青少年自恋人格与问题性社交网络使用的关系:链式中介作用分析

为考察青少年线上积极自我呈现、社交网络使用强度在自恋人格与问题性社交网络使用关系间的链式中介作用,采用自恋人格问卷、问题性移动社交网络使用评估问卷、社交网站自我呈现问卷和社交网络使用强度问卷对1804名中学生进行调查。结果表明:(1)自恋人格、线上积极自我呈现和社交网络使用强度均对问题性社交网络使用有直接正向预测作用;(2)自恋人格对问题性社交网络使用的影响通过三条中介效应实现:线上积极自我呈现的中介效应、社交网络使用强度的中介效应,以及线上积极自我呈现与社交网络使用强度的链式中介效应。     

大型体育赛事的正外部性及其内在化途径

在回顾国内外大型体育赛事正外部性问题研究的基础上,运用经济学理论,分析由大型体育赛事正外部性导致的市场失灵。对我国大型体育赛事正外部性的内在化途径进行探索,提出政府对大型体育赛事的市场供给主体进行津贴和通过市场途径两种解决思路,并分别对此进行阐述。     

Examining the impact of the Respect in Sport Parent Program on the psychosocial experiences of minor hockey athletes

ABSTRACT

Models of positive youth development suggest that athletes may be influenced by parent education programmes; however, there is little research examining the impact of such programmes on athlete outcomes. This study examined the impact of the Respect in Sport Parent Program on athlete outcomes among minor hockey players over three years. This study consisted of cross-sectional and longitudinal online surveys measuring athletes’ positive and negative developmental experiences, prosocial and antisocial behaviours, parental support and pressure, and sport enjoyment and commitment. Athletes completed at least one online survey during the study period (N = 366; 84.2% males; 14–19 years of age; M = 15.4 years), and 83 athletes completed multiple surveys for longitudinal analyses. Cross-sectional results comparing athletes in leagues adopting the programme at different time points indicated significant differences in prosocial behaviours towards teammates. Multilevel longitudinal analyses revealed improvements in athletes’ antisocial behaviours towards opponents, initiative, goal setting, and cognitive skills over time, regardless of whether they were in a league that implemented the programme. However, athletes in leagues that implemented the programme during the study reported greater improvements in antisocial behaviours towards opponents, and there were trends with respect to improved personal and social skills. These findings provide suggestions to improve the delivery and impact of parent education programmes in youth sport.     

我国高水平女足运动员竞技心理特性的研究

采用日本运动心理学会会长德永斡雄先生研制的运动员心理竞技能力诊断量表(DIPCA-3)及竞技特质焦虑量表(TAIS)对2002年全国女足锦标赛参赛选手进行调查。结果显示,心理竞技能力与竞技特质焦虑呈非常显著性相关,心理竞技能力越强,竞技特质焦虑水平也就越低,比赛成绩及技战术水平的发挥也就越好。检测表明,DIPCA-3与TAIS量表测试对于运动员的技战术发挥程度具有较可靠的预测力和高度的相关性,并为有的放矢地进行多因子分层精细化心理训练提供了科学依据。     

一类具有脉冲和变时滞的离散比率依赖食物链模型周期解的存在性

应用Graines和Mawhin的重合度理论中的延拓定理讨论了一类具有脉冲和变时滞的食物链模型的正周期解的存在性。