对线性代数教学的几点思考

本文从线性代数教学实践中总结了一些经验，从任务驱动和反例运用两个方面讨论了如何提高线性代数的教学效果。全文来自于笔者的教学实践，但也不拘泥于实践，具有较高的理论水平和可操作性，相信对从事相关教学工作的同行有着一定的参考价值和借鉴意义。     

独立学院线性代数教学中融入建模思想的探索

数学建模是培养和训练学生的应用和创新能力的良好方法,也是培养学习兴趣的有效途径。本文结合独立学院《线性代数》教学现状,将数学建模思想融入《线性代数》教学中进行了探索与应用。     

浅析线性代数教学中的条件反例

通过几个具体的实例,阐述了反例在线性代数教学中的应用。     

线性代数课程的教学改革

本文分析了我国大部分高校线性代数课程中存在的问题,从优化教学体系、改进教学方法、增加实验环节、提高教师素质几方面提出对这门课程教学改革的建议。     

自制篮球侧掩护战术视频在教学实践中的应用研究

采集Houston Rockets vs Los Angeles Lakers比赛的片段作为篮球侧掩护战术教学的视频素材,利用Adobe Premiere pro 2.0自制篮球侧掩护战术教学视频,辅助篮球侧掩护战术的教学。通过3轮实验对教学效果进行验证。实验以360名华中师范大学本科生为研究对象。对实验组的学生和教师进行问卷调查,调查结果表明:1)篮球侧掩护教学视频辅助教学有助于学生对战术全过程的认识和理解;2)篮球侧掩护教学视频辅助教学有助于提高学生的学习兴趣;3)篮球侧掩护教学视频辅助教学充分发挥了教师主导作用,提高了教学质量;4)依据自身教学特点自制篮球侧掩护教学视频辅助教学有利于教师熟悉教材,解决难点和重点,控制教学全过程。     

网络视频课程在生态学课程中的推介与应用

本文对网络视频课程的优势进行了总结,对其在大学教学中的作用进行了分析,并以生态学为例,总结了网络视频课程在生态学课程中的应用方法,包括同名网路视频课程的全面推介,重点内容网路视频课程相关章节的比较,课内难点网路视频课程相关部分的节选印证,课外知识相关网路视频课程的拓展等,结果表明,利用网络视频课程辅助生态学的教学中获得了良好的教学效果.     

体育短视频在高校体育教学热中的冷思考

随着5G时代的到来,短视频在传播过程中散发出巨大的能量。短视频的出现不仅渗透到大学生的学习与生活中,还潜移默化地影响着高校的体育教学。本文运用逻辑分析、文献资料等方法对短视频在高校体育教学中的具体应用进行了相关研究,结果发现：短视频火热的原因在于它能够契合体育教学特点,资源丰富易获取,可以提供体育教学反馈新模式。而劣势在于：体育短视频难以保障教学质量,教学效果难以检验,体育短视频内容生产质量不高,教学黏合性差。建议：提高体育短视频的教学录制质量,高校教师应增进课堂的趣味度,加强对体育短视频的审核,培养提高相关人员的专业制作水平。     

体育教学视频的开发和利用

在多媒体时代,体育教师有责任在体育教学活动中充分利用信息技术,提高教学水平,培养学生对体育技能的学习理解和兴趣。在体育教学中,我们可以利用体育教学视频对室内、室外教学起到辅助作用,弥补教师的一些缺陷;利用同伴教学视频对学生起到激励作用,以此褒扬优秀的学生并且鼓励其他学生积极学习;利用自我镜像视频可以让学生个体对自己进行直观反思。体育教学工作者有效地利用体育教学视频,可以让教学过程更有效,学生更积极,教学成果更优秀。     

视频拍摄法在大学体育教学中的应用分析

本文利用文献资料法、理论分析法和专家访谈法,结合视频拍摄的功能和体育教学过程的特点,对视频拍摄法在大学体育教学中的应用进行了理论分析,得出视频拍摄法在大学体育教学中应用具有可行性,如果视频拍摄法得到合理应用可以促进学生运动表象的形成、帮助纠正学生的动作,调动学生学习的积极性,增强体育学习的乐趣,提高体育教学效果。     

“视频辅助教学”在体育教学中的应用研究

采用"视频辅助教学"、调查、统计分析等方法,对某学院2个班次的学生设计蛙泳教学实验,比较"视频辅助教学"方法和传统体育教学方法的教学效果。结果显示,"视频辅助教学"方法具有极高的实用性和推广性,学生在蛙泳动作的规范程度、游泳速度、喜爱游泳运动程度以及对"视频辅助教学"方法的满意程度等方面均优于传统的体育教学方法。     

Carbohydrate ingestion improves endurance performance during a 1h simulated cycling time trial

This study examined the effect of carbohydrate ingestion on metabolic and performance-related responses during and after a simulated 1h cycling time trial. Eight trained male cyclists (VO 2 peak = 66.5ml kg -1 min -1 ) rode their own bicycles mounted on a windload simulator to imitate real riding conditions. At a self-selected maximal pace, the cyclists performed two 1h rides (separated by 7 days) and were fed either an 8% carbohydrate or placebo solution. The beverages were administered 25 min before (4.5ml kg -1 ) and at the end (4.5ml kg -1 ) of the ride. With carbohydrate feeding, plasma glucose tended (P = 0.21) to rise before the time trial. Compared with rest, the plasma glucose concentration decreased significantly (P < 0.05) at the end of both rides, with no statistically significant difference being observed between treatments. Thereafter, plasma glucose increased significantly (P < 0.05) at 15 and 30 min into recovery, and was significantly higher at 30 min during the carbohydrate trial compared with the placebo trial. No significant changes in plasma free fatty acids were observed during the ride. However, a significant increase (P < 0.05) in free fatty acids was found at 15 and 30 min into recovery, with no difference between trials. Mean power output was significantly (P < 0.05) greater during the carbohydrate compared with the placebo trial (mean - S.E.: 277-3 and 269-3W, respectively). The greater distance covered in the carbohydrate compared with the placebo trial (41.5-1.06 and 41.0–1.06km, respectively; P < 0.05) was equivalent to a 44s improvement. We conclude that pre-exercise carbohydrate ingestion significantly increases endurance performance in trained cyclists during a 1h simulated time trial. Although the mechanism for this enhancement in performance with carbohydrate ingestion cannot be surmised from the present results, it could be related to a higher rate of carbohydrate oxidation, or to favourable effects of carbohydrate ingestion on the central component of fatigue.     

Science and medicine of rowing: A review

The biology and medicine of rowing are briefly reviewed. Effort in a 2000 -m race is about 70% aerobic. Because the boat (and in some instances a cox) must be propelled, successful competitors are very tall, with a large lean mass and aerobic power. Large hearts may lead to erroneous diagnoses of a cardiomyopathy. Large respiratory minute volumes must be developed by chest muscles that are also involved in rowing. The vital capacity is typically large, and breathing becomes entrained. Expiration cannot be slowed relative to inspiration (as normally occurs at high rates of ventilation) and the limiting flow velocity may be reached, with the potential for airway collapse. Performance is strongly related to the power output at the ‘anaerobic threshold’, and lactate measures provide a guide to an appropriate intensity of endurance training. Peak blood lactate levels are higher in males (commonly 11–19 mmol·l -1 and occasionally as high as 25 mmol·l -1) than in females (9–11 mmol·l -1), probably because males have a greater muscle mass in relation to blood volume. The skeletal muscles are predominantly slow twitch in type, developing an unusual force and power at low contraction velocities. Many rowers have a suboptimal diet, eating excessive amounts of fat. Lightweight rowers also have problems of weight cycling. Aerobic power and muscle endurance often change by 10% over the season, but such fluctuations can be largely avoided by a well-designed winter training programme. Injuries include back and knee problems, tenosynovitis of the wrist and, since the introduction of large blades, fractures of the costae.     

我国体育市场管理法规研究

采用调查法和比较法对全国体育市场立法和管理现状进行调查,对部分较早出台并有一定代表性的省市的体育市场管理法规的立法和管理情况进行了研究,提出了体育市场管理立法和管理的原则、基本程序、措施及其一般模式,为规范全国体育市场管理提供参考依据。     

重新认识体育的社会关联

体育与政治之间存在一个悖论，体育的发展与经济实力之间没有直线相关，体育与教育部分重叠，体育与宗教最为近缘，体育可借用科学手段，体育的艺术禀性日益明显，体育与养生反映着两种人生观。     

上海社区体育竞赛参与者的特点探析

本文在专家访谈、问卷调查、数理统计和文献资料分析的基础上,探析了上海社区体育竞赛参与者的特点、参与者对社区体育赛事运作管理的看法等问题。在此基础上从引进社区体育赛事的志愿者、整合社区体育赛事的各种资源、开发社区体育竞赛的无形资产、组建非营利性的专业团队、规范社区体育赛事的服务管理等方面提出了进一步满足上海社区居民日益增长的体育竞赛参赛需求的对策与措施。     

对全面把握游泳训练环节的探讨

从系统观点出发,结合训练实践,对全面把握游泳训练环节进行探讨。认为应强化非智力因素在运动员多年训练中的作用,在育材全过程中不断选材,从整体上把握动态训练的全过程,把培养高水平运动员的整个过程置于一个严格的科学控制之下。     

我国优秀游泳运动员出发技术辅助训练的研究

为改进我国优秀游泳运动员的出发技术,采用观测和实验方法,通过拍摄运动员陆上和水下出发技术录像以及出发计时,对出发技术进行运动生物力学诊断和分析。在此基础上,根据运动员自身特点和不同泳姿提出相应的入水启动方式,并研制出发训练辅助器材,对出发预备姿势、腾起角度以及飞行远度和入水角进行控制。实践证明:这是一种快捷、有效的出发技术辅助训练方法。     

运动性呼吸肌疲劳与耐力性项目的运动能力

影响和限制耐力性运动项目的成绩的生理因素是复杂的和多方面的,取决于训练的强度和运动成绩.大强度持续性运动可导致呼吸肌疲劳.运动性呼吸疲劳可能在决定运动耐量方面起到关键的作用：一方面通过直接影响运动肌力量的生成（外周疲劳）,另一方面,通过肢体用力自感不安反馈引起工作肌运动单位输出功率下降（中枢疲劳）.对呼吸肌进行训练,可能有助于提高耐力性项目的运动成绩.     

Identifying home advantage in international tennis and golf tournaments

A regression analysis of competitors' tournament results in relation to their world rankings was proposed to identify the effect of home advantage in international ‘grand-slam’ tennis and ‘major’ golf tournaments. The results provided little evidence of home advantage in either the grand-slam tennis or the golf tournaments held in 1993. The only possible evidence of home advantage was found in the Wimbledon tennis and the US Open golf championships. Even these findings can be explained, at least partially, by (1) the availability of information concerning the low world rankings of the British tennis players competing at Wimbledon, and (2) selective entry, allowing only the world's top-ranked foreign golfers into the US open golf tournament. In both cases, the lower ranking home competitors have a greater opportunity to perform above their anticipated world rankings. Therefore, provided entry into tennis and golf tournaments is truly ‘open’ to both the host nation's representatives and foreign competitors alike, home advantage does not appear to be a major factor influencing the competitors' performance in such competitions. These findings may be explained by the relatively objective nature of the scoring systems used in tennis and golf, unlike the subjective influence of refereeing decisions on the results of team-games such as soccer.     

对欧洲足球技战术发展趋势的思考

结合欧洲足球技战术的发展特点,就鲁能泰山足球队的体能训练、技术训练、防守阵型、进攻方式、定位球、职业态度、球星培养等诸方面所存在的不足进行了分析,提出相应的改进意见。