学校体育场馆开放利用存在的问题与对策

学校体育场馆开放有利于全面健身的广泛实施,但在推进过程中存在着诸多问题,探讨与分析学校体育场馆开放存在的问题并提出针对性的建议,有利于学校体育场馆的开放,确保全民健身的深入开展。     

一类四阶两点非线性奇异特征值常微分方程边值问题正解的存在性

考察边值问题y(4)=λ(fx,y) y(0)=y(1)=y″(0)=y″(1)=0的正解的存在性和多解性,其中λ>0,推广了[2]的结论.     

有限域上一类方程在（F^＊）^n中的解数公式

设F=Fq是一个q元有限域,F^＊=F^＊q为其乘法群,q=p^f,f≥1,p是一个奇素数。该文利用组合的方法给出了有限域上F=Fq上一类三次方程x1x2＋x1x2x3＋x2x3x4＋…xn-4xn-2＋xn-1xn=b在（F^＊）^n上解数的一个直接公式,这里b∈F=Fq     

广西中小学教师继续教育的调查研究

综合运用问卷调查、表格调查、个别访谈、集体座谈和文献查阅相结合的方法,全面调研目前广西中小学教师继续教育存在的不足.针对这些不足,可以从以下几个方面解决:给予政策倾斜,建立网络体系,实行"捆绑"制度;用生态学观念制定继续教育规划;推行"有薪学习假"和师范生顶岗实习制度;设置"继续教育超市"等;     

新疆中小学少数民族“双语“师资“培训者“的现状、出路分析(上)

自治区"双语"师资培训启动以来,先后有18所院校约190名教师参与"双语"师资培训工作.文章从汉语水平、教学能力、专业知识水平以及培训者的实验教学能力等方面考察了全疆双语师资"培训者"中汉语教师和专业教师的现状,并对此进行了对策研究.     

一类抽象时滞微分方程的温和解

利用半群方法讨论了一类抽象时滞微分方程,得到了此类时滞方程温和解存在唯一的充要条件。     

一种改进EM算法的联合信道估计与数据检测

最近的一些研究表明,在接收机利用可用的信道估计误差的统计时,可以显著提高检测性能.对此,提出了一种基于改进期望最大化（EM）算法的数据辅助信道估计,它通过在每次迭代中提供估计误差的统计信息,减少在各自的接收器信道估计误差的影响.仿真结果表明,与传统的EM及VBEM算法相比,在不需增加接收机复杂程度的情况下,改进的EM算法在估计精度上优于其对应的传统估计方法,有效降低了信道估计误差,其误码性能接近理想信道时的性能.     

Peer assessment in group projects accounting for assessor reliability by an iterative method

This study proposes an advanced method to factor in the contributions of individual group members engaged in an integrated group project using peer assessment procedures. Conway et al. proposed the Individual Weight Factor (IWF) method for peer assessment which has been extensively developed over the years. However, most methods associated with IWF use a simple average algorithm which still has limitations in effectively reflecting abnormal situations. Therefore, this study proposes an iterative method for measuring a fair IWF by considering each assessor's reliability. The proposed algorithm considers each assessor's reliability which is evaluated by an analysis of variance of the scores given by the assessor. This relative reliability factor is used to improve the fairness of the IWF and reduce the effect of unfair or unreliable assessors' scores. A comparison with previous methods demonstrates that the proposed method resulted in substantially more fair grades being given to individual students for group projects.     

Banach空间中一类广义混合平衡问题系统解的存在性及算法

在实Banach空间中引入和研究了一类新的广义混合平衡问题组.首先考虑了一个辅助混合平衡问题组,通过它与广义混合平衡问题组的等价性,证明了它的解的存在性和唯一性;其次构造了广义混合平衡问题组的近似解的迭代算法.在一定的条件下,证明了由算法生成的迭代序列的强收敛性,这些结果推广并改进了近期的某些结果.     

Testing Measurement Invariance Across Groups in Longitudinal Data: Multigroup Second-Order Latent Growth Model

In latent growth modeling, measurement invariance across groups has received little attention. Considering that a group difference is commonly of interest in social science, a Monte Carlo study explored the performance of multigroup second-order latent growth modeling (MSLGM) in testing measurement invariance. True positive and false positive rates in detecting noninvariance across groups in addition to bias estimates of major MSLGM parameters were investigated. Simulation results support the suitability of MSLGM for measurement invariance testing when either forward or iterative likelihood ratio procedure is applied.