长枞水电大坝的热弹性与渗漏分析

This paper deals with the temperature and displacement fields of the top mid-block of south transition at Long Spruce Generating Station, in the North of Manitoba, Canada. According to the experimental results of Manitoba Hydro in the past two years, the top mid-block is assumed to be a rectangular one that has two supposed temperature distributions at its boundary sides. Then, the temperature fields for the top mid-block are obtained from the analytical solutions by separation of variables. By using the analytical solution of temperature field, the displacement behavior of the top block in various temperature fields is discussed in details. The numerical results are given to show the causes of the leakage between the top mid-block and the dam. Finally, the repair methods for leakage are discussed for practical leaking repair and its engineering applications.     

论人体体液酸碱平衡的调节机制

人的体液保持着一定的H＋浓度,即保持着一定的pH值,才能维持正常的生理和代谢功能.由于人体在代谢过程中会产生一定量的酸性物质或碱性物质,使体液中H＋浓度经常发生波动,但血液的pH值会在狭窄的7.35-7.45范围内变动,主要是人体能经过体液的缓冲系统,肺的呼吸和肾的调节等来平衡酸碱度.     

目击时间的深渊——《野蔷薇》及其他

《野蔷薇》颇富思辨色彩,比较自觉集中地表达了那一时期茅盾的"时间哲学",同时比较早地提出了反思现代性这一历史课题.迁移与错位、直线与循环、潜隐与彰显等诸时间形态的对立与连接构成了文本的内在的叙事理路,也彰显了作者时间意识的深厚蕴含.     

BMI对黑龙江省普通高校学生体质健康的影响因素分析

运用文献资料、测试等方法对黑龙江省8所高校中部分大学生的体质指数(BMI)和大学生体质健康标准测试成绩进行分析研究。结果显示:大学生体质指数分布曲线呈"细峰右尾"型,BMI值基本分布在18.5~24之间,但有相当数量的超重或肥胖的学生。BMI偏低或偏高的学生的身体素质明显低于BMI正常的学生;BMI偏高的学生又低于BMI偏低的学生身体素质。BMI异常都可能会使学生的身体素质下降,BMI偏高的主要影响是使学生的耐力素质、速度素质、相对肌肉力量素质的下降,BMI偏低会使学生的力量素质和柔韧性下降。     

浅析运动员专项身体素质与专项技术的辩证关系

通过对专项身体素质和专项技术的概念、特点,从训练学角度阐述了专项身体素质和专项技术的辩证关系。     

Estimating fat-free mass in elite-level male rowers: a four-compartment model validation of laboratory and field methods

The purpose of this study was to investigate the accuracy of fat-free mass (FFM) estimates from two-compartment (2C) models including air displacement plethysmography (ADP), ultrasound (US), near-infrared interactance (NIR), and the Jackson and Pollock skinfold equation (SKF) against a criterion four-compartment (4C) model in elite male rowers. METHODS: Twenty-three elite-level male rowers (mean± SD; age 24.6 ± 2.2 years; stature: 191.4 ± 7.2 cm; mass: 87.2 ± 11.2 kg) participated in this investigation. All body composition assessments were performed on the same day in random order, except for hydrostatic weighing (HW), which was measured last. FFM was evaluated using a 4C model, which included total body water from bioimpedance spectroscopy, body volume from HW, and total body bone mineral via dual-energy X-ray absorptiometry. The major findings of the study were that the 2C models evaluated overestimated FFM and should be considered with caution for the assessment of FFM in elite male rowers. Future studies should use multiple-compartment models, with measurement of TBW and bone mineral content, for the estimation of FFM.     

Physical Inactivity,Obesity, and Type 2 Diabetes: An Evolutionary Perspective

Physical inactivity (and unhealthy nutrition) has distorted body composition and, in turn, reordered the proportions of myocyte and adipocyte insulin receptors. Insulin acting on adipocyte receptors produces less glucose uptake than does comparable interaction with myocyte receptors. Accordingly, in individuals with disproportionate muscle/fat composition, any given glucose load requires greater-than-normal pancreatic insulin secretion for adequate disposal. This hyperinsulinemia then becomes the leading cause of type 2 diabetes (T2DM) as insulin-sensitive tissues become desensitized. Because T2DM is rooted in potentially reversible lifestyle factors, rather than focusing on the intricacies of glucoregulation at the molecular level and on testing new drugs to control blood sugar, this article calls for a new prevention and treatment paradigm, in which exercise and weight control are essential and for which an inexpensive and acceptably accurate measure of body muscle and fat proportions is needed.     

‘Tidy,toned and fit’: locating healthism within elite athlete programmes

Coaches and athletes have been increasingly inundated with power related ‘truths’ about their bodies, health and performance as they construct their subjectivities. Over the last couple of decades in New Zealand, schools have initiated elite athlete programmes (EAPs) for a select few students based primarily on their athletic ability and fitness levels. Drawing on Gore's techniques of power, my study investigated how healthism and the cult of the body discourses were (re)produced, negotiated and resisted by coaches and elite athletes and how body pedagogies defined and shaped bodies in two high school EAPs. My analysis suggested that ‘toned and fit’ bodies signified responsible athletes compared to ‘fat’ bodies and that elite athletes disciplined their bodies to overcome pain to remain productive. In both EAPs, power circulated at the micro-level of pedagogical practice to normalise and monitor the athletes’ diet, body weight and shape, and reinforced tensions between prudentialism and hedonism.     

寻回身体的记忆：清末民初女子体育教育的身体社会学读解

清末民初,女性的身体被一场关乎国家民族生死存亡的危机抬进了历史的前台。以国族利益为名,对“女子”的身体进行了改造,以致近代女子体育教育的勃兴。通过选取这个独具身体社会学意涵的历史切片,对女性通过接受体育教育、自觉萌发身体意识,以及国家通过建立对新的身体规训制度重塑“新女性”的转折期进行纵深考量。本研究主要采用文献资料法和逻辑分析法,得到以下结论：教会女子学校和国人自办学校是女子体育发生、发展的两个主要阵地,国家通过制度设计、教科书编撰和师资培养予以制度保障。大多数女子们的身体由身困家中到身为国有、身为国用,渐入身心分离之境地。     

浙江省高校新生身体素质现状及发展对策

运用文献资料调研、数理统计法等对浙江省高校 2 0 0 1级新生身体素质的现状进行统计分析。结果表明 ,2 0 0 1级新生身体素质总体水平较低 ,尤其是耐力素质和力量素质。建议采取开展体育教学评估 ,引入竞争机制 ,加强对学生意志品质和吃苦耐劳精神的培养等多种措施来提高学生的身体素质