商范畴的幂等完备化

设M是加法范畴C上的理想,若商范畴C／M是幂等可提升的,令M={a∈Mor（C）｜a∈M）,本文证明商范畴C/M与对范畴C／M的幂等完备化范畴C/M是范畴等价的．     

一类商环的结构

本文通过构造同构映射,讨论商环I[x]/(n x^2)的结构及主要性质,从而推广文的主要结论。     

Effects of consecutive days of match play on technical performance in tennis

Elite tennis is characterised by repeated bouts of up to 5-set match play, yet little is known about the technical requirements of shots played. This study therefore investigated technical performance changes over consecutive days of prolonged, simulated tennis match play. A total of 7 well-trained men tennis players performed 4 consecutive days of competitive 4-h match play. Matches were notated to determine between-day changes in groundstroke and serve performance, as well as point and match durations. Changes ≥75% likely to exceed the smallest important effect size (0.2) were considered meaningful and represented as effect size ± 90% confidence interval. Effective playing time reduced on days 3 and 4, alongside likely increases in “stretch” groundstrokes over the 4 days (mean effect size ± 90% confidence interval; 0.57 ± 0.38) and “stretch” backhand returns on days 2 and 3 (0.39 ± 0.54 and 0.67 ± 0.55). Relative unforced errors increased on day 4 (vs. day 2; 0.36 ± 0.22) and second-serve winning percentage reduced after day 1 (?0.47 ± 0.50). Further, a likely increase in emotional outbursts characterised day 3 (vs. day 2; 0.73 ± 0.57). Consecutive-day match play impairs hitting accuracy, stroke positioning and emotional responses; an understanding of which prepares players for elite-standard tennis tournament play.     

情商教育:素质教育应开辟的新园地

针对目前教育中长期存在的重智力教育,轻情商教育的现状,强调重视情商教育的迫切性和重要性,并指出切实加强情商教育的具体措施。     

试论高校体育教学中学生健商(HQ)的培养

对健商的概念、内涵及高校体育教学在培养学生健商作用方面进行了论述,对学生健商的培养途径和方法进行了初步探讨,它们包括：改变传统观念、树立＂健康第一＂的思想;选择合适的体育教材;选用丰富的教学方法与手段;提高教师自身的素质.     

正规直觉模糊子群

本文讨论了直觉模糊子群的一些性质,给出了正规直觉模糊子群的定义,并给出了直觉模糊商群的概念。     

商映射的限制及复合映射和收缩映射与商映射的关系

商映射是涉及商空间的一个重要内容。首先讨论了商映射的限制还是一个商映射的一个条件,然后讨论有关复合映射与商映射的关系,最后指出收缩映射必为商映射。     

农户兼业对农业结构调整的影响

农户兼业现已是我国各地出现的普遍现象,在增加农民收入方面起着重大作用,但对农业本身的发展却带来了许多负面的影响,主要是不利于农业结构调整,降低土地产出率和土地的利用率,同时也阻碍了农业劳动生产率的进一步提高.兼营农业是农业产业发展过程中的一个过渡形态,必须加以改变.     

电化学中的△G_(T.P)──活度商图与热力学判据

本文发现用△GT.P－活度商图代替电极电位作为电化学中热力学过程性质和自发方向与限度的判据可行，能简单、方便地判断出过程的可逆与否，自发与否及限度．     

在大学英语教学中如何培养学生的情商

大学生是一个特殊的群体,他们不仅有一定的专业知识,还有思想和创新的能力。情商EQ是一个人成功与否的关键,是事业成功的重要条件,英语的交际性决定了学生在教学过程中的参与性、合作性、敏捷性,对于学生情商的培养有着重要的意义。