燃气高温低氧燃烧特性的实验研究     

胡雅琴 《大同职业技术学院学报》2006,(4)

研究表明,提高空气温度能扩大燃气稳定燃烧范围.在空气温度高于800℃,空气含氧浓度低于15%的条件下,丙烷能稳定燃烧,且火焰具有崭新的热力特性.在提高空气温的同时,降低空气含氧浓度,也可有效地调节火焰结构.  相似文献   

上海市市民体育行为与倾向研究   总被引：3，自引：0，他引：3  

卢耿华  李建国  张黎 《西安体育学院学报》2004,21(6):1-4

采用问卷调查、数理统计等方法,对上海市市民生活体育行为与倾向进行了研究,为构建上海市生活体育设施模式提供依据。结论:(1)市民体育行为现状:日常生活圈主要以健身活动为主,周末生活圈主要以休闲体育活动为主,节假日生活圈主要以特色度假体育活动为主。(2)市民体育行为倾向:日常生活圈呈现出由传统型向健身、休闲、娱乐和社交多元化发展的趋势,周末生活圈市民希望以体育休闲、娱乐活动为主,节假日生活圈市民希望参与更为新颖、丰富的特色度假体育活动。  相似文献   

高压氧配合模拟高住低训对游泳运动员血液指标的影响     

姚俊  周卫海 《广州体育学院学报》2003,23(6):44-46

本研究运用模拟HiLo训练法，辅以高压氧(hyper baric 0xygen，HBO)作为运动员大运动量后的训练、恢复手段，对耐力运动员血液生化指标产生的影响进行研究。研究结果显示：这种方法不仅能迅速消除运动员训练后的疲劳，避免疲劳的积累，还能充分调动机体的生理潜能，提高运动员的有氧耐力水平，是耐力运动员的一种有效辅助训练手段。  相似文献   

关于中学生应激状态及行为意向的调查分析     

朱健民  李群 《山东体育学院学报》2002,18(1):46-48

采用问卷调查法，对中学初一至高三的568名男女学生进行应激状态、生活充实度及行为意向的调查分析？结果表明，中学生应激水平随年龄增长而生活充实度则显下降，高应激低充实的年龄特征十分明显。中学生应对高应激低充实的行为意向以睡眠娱乐为主，身体锻炼手段未被广泛认可。  相似文献   

对低压电器行业开发智能化电器的探讨     

李琴兰 《天水师范学院学报》2002,22(5):50-50

从国内外的情况看,开发智能化电器已成为当前低压电器行业的重点方向,断路器是低压电器智能化的突破口。  相似文献   

Being in the archive: affect and scholarly distance     

Bernadette Brennan 《档案与原稿》2018,46(1):3-17

Working in the archives of living writers provides exciting possibilities for extended interpersonal research as well as ethical challenges. This article explores the author’s experience of working in Helen Garner’s restricted archives and negotiating the demands of scholarly objectivity with an increasingly felt empathic engagement. The author traces a chronological path through the archives relating to Garner’s three substantial works of non-fiction: The First Stone (1995), Joe Cinque’s Consolation (2004) and This House of Grief (2014). She draws attention to some of the ways in which distance and objectivity can be influenced not only by contact with a living writer but also by the space in which the archive is encountered. With a deliberate focus on the lived experience of researching, rather than a scholarly examination of archival theory, the author offers a case study of how the interaction of archives and living subject can shape research and publication.  相似文献   

Screening for risk of low energy availability in athletic and recreationally active females in Ireland     

Danielle M. Logue  Sharon M. Madigan  Mirjam Heinen  Sarah-Jane McDonnell  Eamonn Delahunt  Clare A. Corish 《European Journal of Sport Science》2019,19(1):112-122

ABSTRACT

Introduction: Low energy availability (LEA) results in physiological adaptations, which can contribute to unfavourable health outcomes. Little information exists on risk of LEA in active individuals competing in different sports or levels of competition. The aims of this study were to (1) identify risk of LEA in females competing at different levels of competition and (2) investigate associations between risk of LEA, illness and dietary habits. Methods: The validated questionnaire, ‘Low Energy Availability in Females Questionnaire’ was distributed online (November 2016–February 2017) to assess risk of LEA. Twenty-nine additional questions collected information on demographics, illness history and dietary habits. Participants were considered at risk of LEA if they attained a score of?≥?8 and were grouped into: (i) international; (ii) provincial/inter-county; (iii) competitive; and (iv) recreationally active. Chi-square and logistic regression analyses were used to explore differences between those at risk or not at risk of LEA. Results: Risk of LEA was identified in 40% (n?=?331) of 833 participants and was 1.7 and 1.8 times more likely in international and provincial/inter-county athletes compared to those who were recreationally active (International: odds ratios (OR) 1.68, 95% confidence intervals (95%CI) 1.12–2.54; Provincial/inter-county: OR 1.83, 95%CI 1.20–2.77). In participants at risk of LEA, missing >22 days of training during the previous year due to illness occurred 3 times more frequently (OR 3.01, 95%CI 1.81–5.02). Conclusion: Risk of LEA was widespread in this heterogeneous sample. Awareness of LEA and the development of appropriate energy management strategies to ensure athlete health across levels of competition are required.  相似文献   

大学生独立生活能力与法律素质培养探讨     

衣仁翠 《贺州学院学报》2015,(2):49-52

分析独立生活能力和大学生法律素养的涵义及其意义,就目前我国大学生法律素质的现状,初步提出有利于提高大学生法律素质的方法和途径,为更好地实现大学生独立生活能力提出了一些浅见。  相似文献   

Adult mental health outcomes of child sexual abuse survivors born at extremely low birth weight     

《Child abuse & neglect》2016

The high prevalence of child sexual abuse (CSA) is concerning, particularly as survivors are at increased risk for multiple adverse outcomes, including poor mental health across the lifespan. Children born at an extremely low birth weight (ELBW; <1000 g) and who experience CSA may be a group that is especially vulnerable to psychopathology later in life. However, no research has considered the mental health risks associated with being born at ELBW and experiencing CSA. In this study, we investigated the mental health of 179 ELBW survivors and 145 matched normal birth weight (NBW; >2500 g) participants at ages 22–26 and 29–36. At age 22–26, CSA was associated with increased odds of clinically significant internalizing (OR = 7.32, 95% CI: 2.31–23.23) and externalizing (OR = 4.65, 95% CI: 1.11–19.51) problems among ELBW participants exposed to CSA compared to those who did not, though confidence intervals were wide. At age 29–36, CSA was linked to increased odds of any current (OR = 3.43, 95% CI: 1.08–10.87) and lifetime (OR = 7.09, 95% CI: 2.00–25.03) non-substance use psychiatric disorders, however, this did not hold after adjustment for covariates. Statistically significant differences in mental health outcomes were not observed in NBW participants exposed to CSA compared to NBW participants who were not exposed. Survivors of significant perinatal adversity who are also exposed to CSA may be at higher risk for psychopathology through the fourth decade of life.  相似文献   

浅谈地下中空薄壁混凝土结构的裂缝防预构造措施     

滕先飞  裴锐 《辽宁科技学院学报》2015,(3):23-24

大尺寸薄壁钢筋混凝土结构,对温度的变化和基础的不均匀沉降较为敏感。制定合理的施工方案,材料的合理选择、施工流程精心组织保证了裂缝控制效果良好。  相似文献