非白噪声干扰下的ARMA模型

本文讨论了非白噪声以及退化情形下的ARMA模型平稳解的存在唯一性及谱系的表达,也讨论了与预报有关的解的{x_t}取值范围与{y_t}取值范围之间的关系。     

运动时的血乳酸与血红蛋白饱和度关系的研究——一种新型血红蛋白含量测定法

血乳酸是体育科学研究中历史最长、应用最为广泛的指标之一.组织中HbO2的含量与运动员氧摄入能力之间亦有密切的关系.通过血红蛋白分析器测定血红蛋白含量,运用荧光酶微量法测定血乳酸浓度及PO2,探讨运动时HbO2与血乳酸浓度变化的关系,并建立两者间的数学模式.为人体组织中血红蛋白含量的无损、动态、实时监测提供理论依据.     

计算机技术在英语课堂教学中的运用

利用计算机辅助教学激发学生兴趣，加强课堂操练密度，加强听、说、读、写技能的培养。     

四元数序列空间l~∞

以l∞空间的有关性质为基础研究四元数序列空间l∞的性质,即四元数序列空间l∞是一个完备不可分的空间.     

概率流密度矢量是方形势垒穿透中之守恒量

本文证明 ,在一维方形势垒贯穿中 ,概率流密度矢量 J→ =Jex→ 是一个守恒量。     

封闭体系中流体密度测定的新方法

本文提出一种基于压差法测量封闭体系中流体密度的方法,且所用设备简单,操作容易,可广泛用于食品、化工、制冷工业及能源技术。与微机相配合,可用来控制上述生产过程中流体的密度或浓度,以监视工艺过程或使过程正常运转。     

浸润性固体密度的测量

本文介绍了两种测量浸润性固体密度的方法，经过分析和实验检测，方法可行，实验结果误差较小。     

浅析密度、氮肥对苏玉(糯)一号高产栽培的作用

运用二次通用回归旋转设计,分析了密度、氮肥对糯玉米杂交种产量的影响。并建立了模拟优化的密度、氮肥实施方案。     

The role of community in the development of elite handball and football players in Denmark

The primary purpose of this study was to investigate the effect of the place of early development in a sample of Danish male elite and youth handball and football players. The sample included 366 handball and football players from the elite Danish league in the season 2011–2012 and a comparison sample of youth players under the age of 12 from 2003, including 147,221 football and 26,290 handball players. Odds ratio analysis showed that both population size and density significantly affected the proportional number of youth players per community and the odds of athletes reaching an elite level in football and handball. The odds for youth player registrations in both handball and football increased in rural in contrast to urban communities. However, elite football players primarily came from communities of high density (>1000 pop./km²), whereas elite handball players primarily came from less densely populated communities (100 to <250 pop./km²). Furthermore, there seems to be a relation between representation of elite and talent clubs in different communities and the probability of becoming an elite player in both sports. The limited number of elite players in both sports from rural communities may be due to national talent development strategies that do not incorporate development support for clubs in rural areas. Additionally, the results of the study clearly suggest the need to include the youth player population to advance research findings in birthplace effect studies.     

一维谐振子的动量几率幅和等式型不确定关系

推出了一维谐振子的位置不确定范围、动量几率幅和动量几率密度的递推公式、动量不确定范围和等式型动量一位置不确定关系．指出一维谐振子的ΔpΔx的下限恰好是普遍形式的不确定关系给出的下限h／2，而一维无限深势阱的△p△x的下限比h／2要稍微大一些，所以，一个量子系统的ΔpΔx的下限并非必须等于h／2。