运动性贫血的发生机制与监测   总被引：29，自引：1，他引：28  

张缨  文茹 《北京体育大学学报》2001,24(3):331-334

运动性贫血在体育运动 ,尤其是耐力运动中 ,不仅严重影响运动技能的发挥和成绩的提高 ,而且对身体也十分有害。高血容量反应是运动训练适应性表现 ,不会造成真正意义的贫血 ,而运动训练中红细胞溶血和铁储备状况的监测则是预防运动性贫血的重点。本文以近年来的研究进展 ,就运动性贫血的发生机制做一简述 ,并筛选取血量微、测试简易、灵敏的指标 ,加强运动训练中铁代谢和红细胞溶血等状况的监控 ,将对预防运动性贫血的发生有着十分重要的意义  相似文献   

OPC技术与过程监测系统开发     

叶银忠 《上海海事大学学报》2001,22(3):205-209

OPC是一种连接硬件装置或软件数据库等数据源与过程控制客户应用程序之间的标准化的接口协议,它可以显著地增强过程控制领域中的控制系统、现场设备、管理应用程序之间的互操作性,为实时综合监测系统的开发提供一条高效、可靠的新途径.本文首先论述了过程监测系统开发所面临的一般性问题,强调了实时数据通信问题的重要性,概要介绍了OPC模型的结构与特点,分析了他与传统的Client/Server模型之间的区别,最后介绍了OPC技术在船舶机舱集中监测报警系统开发中的应用.  相似文献   

江苏省农村居民体质健康水平的比较研究          下载免费PDF全文

冯志坚  傅建霞 《体育科研》2008,29(2):83-86

目的：了解江苏省不同地区农村居民的体质健康现状，把握2000年到2005年农村居民体质水平的变化趋势。方法：采用卡方检验，比较不同年份和地区的体质等级水平情况，使用方差分析、t检验比较年份、地区的体质总分改变情况。结论：苏南地区农村居民体质水平变动不大，苏中有明显改善，但不合格率仍处于较高水平，苏北的体质水平整体有所下降。为加快社会主义新农村建设，应加强农村居民体育锻炼，做好农村居民体质水平宣教工作，全面提高农民素质。  相似文献   

Environmentally-induced stone decay: the cumulative effects of crystallization–hydration cycles on a Lincolnshire oopelsparite limestone     

Belinda J. Colston  David S. Watt  Helen L. Munro   《Journal of Cultural Heritage》2001,2(4)

An investigation has been undertaken at St Andrew’s church, Walpole St Andrew, Norfolk, to establish the underlying causes of the observed stone decay to the upper parts of the six stone piers. The stone decay was first recorded in the early 1930s. The salt-contaminated masonry within the church has been shown to undergo severe salt decay during the summer, with little damage occurring over the winter months. The south aisle piers have been shown to decay 2.5 times faster than the north aisle piers. Although crystallization–hydration cycles have been identified, the rate of decay is at its greatest when the cycling is relatively infrequent. This was not the expected trend. Furthermore, it has been shown that during extended periods where the ambient relative humidity is less than 75%, the rate of decay reaches a maximum. It is the length of this ‘drying’ period that apparently has the greatest influence on the rate of decay and could explain the significant difference in the rate of decay between the south and north aisle piers. The results have serious implications for passive conservation, where it is often recommended to lower the ambient relative humidity to well below the equilibrium relative humidity of the salt contaminant, to avoid crystallization–hydration cycles. Since, at the time of building, the church was situated on the coast, it is possible that the sodium chloride contamination occurred during the building process (1440–1520), particularly since the area was prone to sea-flooding at this time. Alternatively, the salt could have been applied as a treatment during the general restoration of 1897. Whatever the source of the salt, it seems likely that the ambient environment was changed by the insertion of a sealed floor in 1897, which could account for the onset of the salt decay.  相似文献   

基于Jess规则的数据库通知服务   总被引：1，自引：0，他引：1  

胡勤友施朝健  陈海山危强 《上海海事大学学报》2006,27(1):44-48

提出一种实现数据库通知服务的技术框架,使用Jess规则代替SQL编码来表达用户的数据监控策略,规则执行时先由规则解释器将规则翻译成SQL语句然后执行.使用这种方法,数据监控策略易于理解和接受,修改方便;其次,可在规则解释器中实现异构数据库系统之间的关联通知服务;最后,Jess规则还可以进行复杂的推理,实现通知业务的智能化.  相似文献   

Oddy Test Reloaded: Standardized Test Equipment and Evaluation Methods for Accelerated Corrosion Testing     

Hildegard Heine 《文物保护研究》2018,63(5):362-365

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Particle Penetration,Emission and Deposition in the Diocesan Museum in Udine,Italy to Assess Soiling of Giambattista Tiepolo’s Wall Paintings     

Chiara Bertolin  Marcin Strojecki  Roman Kozłowski 《文物保护研究》2018,63(5):326-328

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我国大学生体质监测管理模式的重构          下载免费PDF全文

赖锦松 《河北体育学院学报》2016,30(4):47-52

我国现行的大学生体质监测管理模式分为行政统筹型和高校自主型两类,其实效性明显不足,为实现管理工作的长效规范和切实增进大学生体质健康,迫切需要重构大学生体质监测管理模式.认为,应在现状基础上构建三级、分类、联网的大学生群体体质监测管理模式和标准化投入、规范化监测、人性化服务相结合的大学生个体体质监测管理模式,并在国家、省、高校之间规范机构设置,完善机构职能,建立质量评估体系,提高运行效率,完善保障措施,落实服务与干预,以促进大学生体质监测管理工作取得实效.  相似文献   

银行监督、利率管制与中小企业融资   总被引：1，自引：0，他引：1  

刘宇光 《徐州师范大学学报(哲学社会科学版)》2005,31(3):85-88,92

自有资金较少的中小企业只有在受到监督的情况下才能得到贷款。而监督需要成本,在监督成本较高的情况下,银行就不愿意发放监督贷款,中小企业就很难得到融资。只有进行利率市场化改革和降低监督成本,才能解决中小企业融资难的问题。  相似文献   

Validity of Self-Reported Pedometer Steps per Day in College Students     

Brittany Star Overstreet  Scott E. Crouter  George A. Butler  Cary M. Springer  David R. Bassett 《Measurement in physical education and exercise science》2016,20(3):140-145

The purpose of this article was to examine the validity of self-reported pedometer steps/day. Forty-seven participants were provided a New Lifestyles NL-2000 (NL-2000; Lees Summit, MO, USA) pedometer and a physical activity (PA) diary for 3 weeks, but not informed of the data-storing capabilities. For weeks 2 and 3, each participant was given a step goal of 3,000 steps/day above week 1 average. A 2 × 3 repeated measures analysis of variance (ANOVA) was used to examine differences between reported steps/day. Bland–Altman plots assessed the mean bias and limits of agreement between reporting methods. Mean self-reported and NL-2000 steps/day were 9,264 ± 3,555 and 8,971 ± 3,590 steps/day (n = 26, p > .05). Mean biases were 216 ± 1,753 (week 1), –506 ± 1,355 (week 2), and –590 ± 1,360 (week 3) steps/day. Negative mean bias values indicate higher self-reported steps/day. Mean steps/day were similar between recording methods, but large differences were observed among individuals, suggesting self-reported steps/day may be valid for PA research at the population level, but not the individual level.  相似文献