毛泽东的生死观

青年毛泽东的生死现具有自然主义和浪漫主义相结合的特色,晚年则转变为理性主义。人的生命虽然是有限的,但可以通过体育锻炼延长生命的长度和“只争朝夕”的精神扩大生命的内涵。生命的意义不在于寿命的长短,而在于是否活得有意义和死得其所。只有那些为人民利益而死、捍卫自己人格尊严和民族气节的人才是高尚的、伟大的。     

Light-load maximal lifting velocity full squat training program improves important physical and skill characteristics in futsal players

This study aimed to compare the effect of 6 weeks of resistance training or combined resistance training and change of direction exercises on physical performance and motor skills in futsal players. Thirty-four futsal players were divided into full squat group (SG, n = 12), combined full squat and change of direction exercises group (S+CDG, n = 12) and control group (CG, n = 10). The resistance training for SG consisted of full squat with low load (~45–58% 1RM) and low volume (4–6 repetitions), whereas the S+CDG performed the same resistance training program combined with loaded change of direction. Sprint time in 10 and 20 m, change of direction test, countermovement vertical jump (CMJ) height, maximal strength and force–velocity relationship in full squat exercise, kicking speed ball (BS_mean) and repeated sprint ability (RSA_mean) were selected as testing variables. Both experimental groups showed significant improvements for CMJ, BS_mean and all strength parameters. Only SG resulted in significant sprint gains, whereas S+CDG also achieved significant improvements in RSA_mean. The CG remained unchanged after training period. No significant differences were found between both experimental groups. These findings suggest that only 12 sessions of either lightweight resistance training alone, lifting the load at maximal intended velocity or combined with change of direction exercises is enough to improve several physical and skills capacities critical to futsal performance in adult players.     

From passivity to a new border-crossing subjectivity

Abstract

1997 as a global media spectacle about Hong Kong’s handover of its sovereignty from Britain to China is now almost forgotten; yet Hong Kong is still caught between the politics of time and memory too complex to be captured under simple post‐colonialist notion such as ‘hybridity’. This paper tries to put in perspective a (post‐)colonial cultural politics of counter‐memory in Hong Kong cinema by investigating its decades‐long investment in a sub‐genre built around the motif of undercover‐cop. Specifically, the example of the blockbuster Infernal Affairs series is analyzed in details, with particular attention to its innovative plot, to show how the ‘structure of feeling’ about Hong Kong’s political fate is embedded in the films underpinning their local box‐office success. The allegorical reading of the film series attempted in this paper also connects the discussion about the ‘political unconscious’ of Hong Kong, now and in the past, with the wider problem of how the future political subjectivity of Hong Kong will take shape.     

基于TSM模型的感应电机有限时间跟踪控制

根据变结构控制理论提出了一种新的设计方法——有限时间切换控制。在控制器设计中利用中继切换控制使系统在给定的当前控制律的作用下运行到某一特定状态（或某一特定区域）后,控制律被切换为有限时间收敛的终端滑模控制器,并使得系统在有限时间内达到平衡状态。有限时间跟踪控制器的设计保证了闭环系统所有信号的有界性和平衡点的全局稳定性,以及系统在有限时间内精确地跟踪给定的参考信号,仿真结果说明该控制策略的有效性。     

船闸阻抗影响下的内河航线非线性配船模型

为得到可靠的最优航线配船方案,从内河繁忙航线上船舶过闸的时间开始研究,得出船舶经过船闸处时间变动与航线配船数量的关系;在线性规划的航线配船模型基础上,建立受船闸时间阻抗变动影响的航线非线性配船模型.应用该模型,设计某一内河航运船队的最优配船方案.分析表明,该非线性模型考虑的影响因素更全面,运用该模型得到的配船结果比线性规划模型更合理.     

衬垫与箱壁间空隙对苹果预冷效果的影响

为确保果蔬品质、延长储存期和货架期,采收后快速预冷去除田间热是冷链物流的关键环节.装有内部衬垫和产品的包装箱内部结构复杂,导致严重的冷却异质性.着眼于内部衬垫设计对苹果预冷效果的影响,尝试给出衬垫与箱壁间空隙的最佳宽度.以目前市场上广泛使用的瓦楞双层苹果包装箱为研究对象,建立三维模型,采用直接计算流体力学方法研究苹果的...     

青少年男子400m跑项目分段计时训练的研究分析

运用文献资料法、数理统计法、对比分析法、实验法等方法对男子400m跑项目进行分段计时研究。研究结果：（1）分段计时跑很好地控制了运动员的节奏,合理的分配了体力,即在第一时段以中强度跑,第二时段以高强度跑,第三时段是冲刺阶段,但往往速度最慢;（2）分段计时训练的学生在心理上和体力上相比于传统训练的学生都占有优势;（3）分段计时法还可以帮助教练员对运动员的跑进行技术诊断;（4）提高运动员的成绩主要从运动员的速度、耐力、时间分配以及训练过程中能量的供应,制定合理的、科学的训练方法。     

小学生生活体育制约因素探讨:时间地理学的视角

针对小学生体质多年来持续下降问题,从时间地理学的视角分析制约小学生生活体育的因素。研究认为,余暇时间的活动安排、社区生活体育设施的成人化设置、家庭成员的体育生活方式以及传统思想和习俗的错误认识,已成为制约小学生群体生活体育活动的主要因素。家庭与社会应高度重视,并努力解除这些制约因素,才能与学校体育形成合力,共同解决小学生体质问题。     

“阳光体育运动”实施的实证研究——以四川省为例

通过问卷调查法、文献研究法和访谈法,对四川省中小学实施阳光体育运动的情况进行了调查。结果表明:四川省60%的中小学认真执行阳光体育运动;在时间上较为集中安排在上午的课间操和下午的课外活动;在活动内容选择上中小学校集中在广播操、跑步上。并提出对策:建立督导制度;加大对农村中小学校投入;建立教学—课余锻炼——竞赛为一体的新体育课程理念。     

论休闲体育与“垃圾时间”

本文运用文献资料法,逻辑分析法、演绎法等论述了“垃圾时间”产生的原因、特点及影响因素,阐述了休闲体育与“垃圾时间”之间存在的相互影响和制约的关系,指出以休闲体育的方式来善渡“垃圾时间”督促人们更多地把8小时工作以外的时间多投入到参与休闲体育中来,有利于人们获得平和、宁静的心态,实现人的全面发展,提高人的生活质量。