共查询到20条相似文献，搜索用时 62 毫秒
1.
可移动式冷库的耗能水平直接影响可移动式冷库的使用成本,可移动式冷库通常由保温箱体、制冷设备、电控柜构成,把断热结构引用到保温箱体中,可以减少保温箱体内外部的热传递,减少制冷设备的运行时间,降低可移动式冷库的能耗和使用成本。 相似文献
2.
城市高层建筑中电梯数量的增长使得电梯困事故频发。提供快速、有效、专业的电梯应急救援是电梯用户和社会发展的必然要求。结合物联网技术提出了电梯生产、使用、维保、监管等单位构建的一体化救援平台体系。救援平台体系可获取电梯实时运行状态,并按照权限不同构建了由维保单位、小区物业、电梯厂家和电梯监管部门组成的四位一体救援响应模式,对电梯困人和电梯故障预判提出了应对方案,提高电梯维保效率,提升电梯安全服务水平,确保了四个“第一时间”目标的实现。 相似文献
3.
我国现行体育彩票的发行和监管体制存在责权不明,权力分散及公益金使用的诸多问题,所以要对我国的体育彩票监管体制进行改革,对体育彩票发行机构实行企业化经营,对监管机构进行重构,对公益金的使用和分配制度进行改革。 相似文献
4.
徐忠 《体育科技文献通报》2013,21(1):127-128
通过对湖北省第12届中学生运动会、湖北省第11届大学生运动会、第6届全国农民运动会中114名运动员进行问卷调查,对27名教练员进行访谈调查,发现国内基层体育竞赛中运动员身份造假现象严重,其中冒名顶替、伪造身份和虚报年龄较为突出.分析得出,急功近利、道德缺失和监管不健全是促使参赛单位和运动员造假现象的主要原因.阐述了运动员身份造假现象给我国竞技体育的发展和社会造成众多不良的影响,并提出了相关建议和有针对性的解决方法. 相似文献
5.
辐射监测系统是核电站仪控系统的重要组成部分,是核电站安全可靠运行的重要监测手段。田湾核电站的自动辐射监测系统具有其自己的特点。本文描述了自动辐射监测系统的组成和功能,对其维护经验进行了总结。 相似文献
6.
采用文献资料、综合分析等方法，针对上海市体育市场的特点、断点和盲点，按照“一张网、一套账、一盘棋”的设计理念，梳理了体育市场事中事后监管体系理论框架和内涵，讨论了构建全息型监管体系的逻辑关系、功能架构和实施路径。在此基础上提出：构建体育市场事中事后全息型监管体系的理论模型，包括编织三位一体的监管网络、使用信息共享的数据账本和建立协同共治的监管格局；力求在事前通过数据资源层识别风险，在事中通过平台服务层实时抓取市场主体经营数据，实现预判和应急处突，在事后通过引入第三方的评估和联合惩戒，提升监管效能。 相似文献
7.
运营监管是组织良性运行的必要条件。采用文献资料法,通过体育社会组织概念的梳理和组织特征的阐述,以及组织运营监管时间、空间两个维度的分析,针对不同类型的体育社会组织,提出相应的监管方式:有效的外部监管、法律法规体系的完善更适用于公益性体育社会组织;互益性、自发性体育组织更强调内部监管;基金会和民办非企业单位则应该公开财务状况,以起到社会监督的效果。 相似文献
8.
以小城镇社区体育为中心发展农民体育 总被引：9，自引：2，他引：7
提出以小城镇社区体育作为突破口,发展农民体育的基本思路。小城镇的区位优势和先进的基础设施对农村及城市富余劳动力的吸纳和对周围乡村的集聚、辐射和带动功能以及城乡结合的社区文化和生活方式,决定了它在农民体育发展中的重要地位。建议政府要为发展农民体育创造良好的条件和氛围;加快建立和完善依托小城镇,面向农村的体育组织网络,培养体育骨干;利用当地学校和企事业单位的体育资源;引导农民利用地方特点和资源开展有特色的体育活动。 相似文献
9.
中美大学校际体育竞赛监管体系的比较研究 总被引：1，自引：0，他引：1
中国大学校际竞赛监管体系的构建一直以来受政策不稳定、竞赛市场开发不足的影响,没有受到应有的重视.模糊定位的监管主体,零散而不完整的监管法规,导致大学校际竞赛监管行为不规范,影响了中国大学校际体育竞赛的健康发展.综合运用比较分析、调查访谈、数理统计等研究方法,以全美大学体育协会(NCAA)为参照进行比较研究,系统探讨了中国大学校际体育竞赛监管体系的构建问题.从监管主体的组织架构到竞赛监管法规体系、政策原则做了较为详细的论述,并就未来我国大学校际竞赛监管法规的总则和体系框架做出大胆构想. 相似文献
10.
11.
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. 相似文献
12.
Roy J. Shephard 《Journal of sports sciences》2013,31(7):603-620
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. 相似文献
13.
14.
重新认识体育的社会关联 总被引：3，自引：1，他引：2
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。 相似文献
15.
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。 相似文献
16.
对全面把握游泳训练环节的探讨 总被引：4，自引：0，他引：4
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。 相似文献
17.
18.
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. 相似文献
19.
青少年业余足球运动员运动倾向性5因素结构模型初探 总被引：3，自引：0，他引：3
根据Scanlan等人最新提出的运动倾向性理论模型,结合我国实际情况建立了青少年足球运动员运动倾向性5因素结构模型。运动倾向性被定义为:渴望和决心继续参加足球运动的心理状态。所建立的5因素结构模型认为,运动倾向性是由运动乐趣、参与选择、个人投入、社会约束及参与机会5个因素决定。经确定5个决定因素和运动倾向性的操作定义,编制了相应调查问卷,通过对北京市252名青少年足球运动员实测结果,建立运动倾向性及其影响因素的协方差结构模型,用Lisre 18分析的结果表明:该运动倾向性模型比较符合北京青少年足球运动员。其中运动乐趣、个人投入、参与机会和参与选择4因素对运动倾向性有影响;社会约束对运动倾向性影响不大。 相似文献
20.
The aim of this study was to assess the sensitivity of the lactate minimum speed test to changes in endurance fitness resulting from a 6 week training intervention. Sixteen participants (mean +/- s :age 23 +/- 4 years;body mass 69.7 +/- 9.1 kg) completed 6 weeks of endurance training. Another eight participants (age 23 +/- 4 years; body mass 72.7 +/-12.5 kg) acted as non-training controls. Before and after the training intervention, all participants completed: (1) a standard multi-stage treadmill test for the assessment of VO 2max , running speed at the lactate threshold and running speed at a reference blood lactate concentration of 3 mmol.l -1 ; and (2) the lactate minimum speed test, which involved two supramaximal exercise bouts and an 8 min walking recovery period to increase blood lactate concentration before the completion of an incremental treadmill test. Additionally, a subgroup of eight participants from the training intervention completed a series of constant-speed runs for determination of running speed at the maximal lactate steady state. The test protocols were identical before and after the 6 week intervention. The control group showed no significant changes in VO 2max , running speed at the lactate threshold, running speed at a blood lactate concentration of 3 mmol.l -1 or the lactate minimum speed.In the training group, there was a significant increase in VO 2max (from 47.9 +/- 8.4 to 52.2 +/- 2.7 ml.kg -1 .min -1 ), running speed at the maximal lactate steady state (from 13.3 +/- 1.7 to 13.9 +/- 1.6 km.h -1 ), running speed at the lactate threshold (from 11.2 +/- 1.8 to 11.9 +/- 1.8 km.h -1 ) and running speed at a blood lactate concentration of 3 mmol.l -1 (from 12.5 +/- 2.2 to 13.2 +/- 2.1 km.h -1 ) (all P ? 0.05). Despite these clear improvements in aerobic fitness, there was no significant difference in lactate minimum speed after the training intervention (from 11.0 +/- 0.7 to 10.9 +/- 1.7 km.h -1 ). The results demonstrate that the lactate minimum speed,when assessed using the same exercise protocol before and after 6 weeks of aerobic exercise training, is not sensitive to changes in endurance capacity. 相似文献