从第12届全运会看竞技太极拳项目的发展     

程馨  ;董逢威  ;李芳芳 《体育科技文献通报》2014,(10):35-36

竞技太极拳经过多年磨练,现在的发展状况是否合理化、规范化是本文研究重点。通过文献资料法、实地调查法等对运动员训练、竞赛期间比赛成绩、难度动作完成质量及编排几个方面进行分析讨论。研究发现:运动员对难度动作的把握水平整体提升,比赛中难度动作缺失一定区分度,对竞技太极拳的发展不利。应在高难度上加大创新力度。竞技太极拳的编排逐渐趋于合理化。  相似文献   

船舶制冷空调系统对环境的污染及其控制对策     

孙永明 《上海海事大学学报》1999,(4)

大气臭氧层的空洞已成为全球环境保护的焦点。中国的远洋运输船队是世界最大的船队之一。由于船用制冷空调系统在海运业的广泛使用,CFCs和HCFCs的使用使全球环境愈加恶化。从环保角度出发,本文介绍了国际上最新的CFCs和HCFCs的禁用日程及动向,比较了几种相对成熟的替代物,并从船舶制冷空调系统的操作和维护角度就如何避免环境污染提出了一些方法  相似文献   

软科学研究要关注“十二五”发展重大问题   总被引：1，自引：1，他引：0  

胥和平 《中国科技论坛》2010,(4)

当前,国际经济形势和经济发展驱动因素发生了新的变化,科技和创新成为经济发展的主要推动力。在此背景下,为各级政府和科技部门提供科学决策依据的软科学研究处于非常关键的位置。为全面促进"十二五"经济社会发展,软科学研究需要抓重大问题,要注意研究基础性理论和政策问题,要特别突出实践性,要提高软科学研究位势,扩大影响。  相似文献   

关于在“十二五”规划中设置国土资源领域核心指标的建议          下载免费PDF全文

马永欢 《中国科学院院刊》2010,25(4):397-405

国土资源是经济社会可持续发展的基石,直接关系到粮食安全、经济安全、国防安全和生态安全,是生存之基,发展之本,财富之源。在规划"十二五"发展之际,有必要把国土资源领域带有全局性、根本性的问题纳入国民经济和社会发展规划,从而使国土资源在参与宏观调控的过程中发挥保障发展、保护资源的基础性作用。  相似文献   

第12届欧洲足球锦标赛决赛阶段各队进球统计与分析   总被引：13，自引：0，他引：13  

郭书胜  李书玲  刘涛 《中国体育科技》2005,41(3):86-88

通过对第12届欧洲足球锦标赛决赛阶段31场比赛的77个进球情况进行统计分析,结果显示,下半场的进球数高于上半场,比赛的开始时段是进球的低谷,75～90min时段是进球的高峰;进球的主要射门区域是在罚球区内;进球射门方式以脚射为主;中路进攻和边路进攻相结合才是进球的有效手段;各位置进球最多的是前锋运动员。  相似文献   

Adverse family experiences and flourishing amongst children ages 6–17 years: 2011/12 National Survey of Children’s Health     

《Child abuse & neglect》2017

Adverse Childhood Experiences (ACEs) are prevalent in the population and linked to various negative long-term health and social consequences. However, due to the retrospective nature of most studies on the topic, little is currently known regarding ACEs' immediate health impact. This study aims to provide insight into this area by examining the association between a new measurement, Adverse Family Experiences (AFEs), and flourishing amongst children ages 6–17 years in the United States. Data from the 2011/12 National Survey of Children's Health were analyzed. Adjusted prevalence ratios assessed flourishing by the number of AFEs (0 events versus 1, 2, 3/3+) controlling for individual/household characteristics. A sub-analysis examined characteristics of flourishing children ages 12–17 years with 3/3+ AFEs. The results showed children with 1 AFE (APR = 0.87; 95% CI = 0.83-0.91), 2 AFEs (0.74; 0.69–0.79), and 3/3+ AFEs (0.68; 0.62–0.72) were less likely to flourish compared to those without any AFEs. Sub-analysis of children ages 12–17 years with 3/3+ AFEs revealed a higher proportion of flourishing children volunteering, participating in extracurricular activities, and working for pay compared to those who did not flourish. Findings show significant differences in flourishing by number of AFEs and suggest that social connectedness may play a role in determining flourishing amongst children with 3/3+ AFEs. Furthermore, the results highlight the potential importance of identifying children with high AFE counts and helping them build resilience outside of the home.  相似文献   

Literature review: The role of the teacher in inquiry-based education     

《Educational Research Review》2017

Inquiry-based education receives much attention in educational practice and theory, since it provides pupils and teachers with opportunities to actively engage in collaboratively answering questions. However, not only do many teachers find this approach demanding, it also remains unclear what they should do to foster this type of education in their classrooms. Our research question was: Which teaching strategies are used by K-12 teachers when promoting inquiry-based education in their classrooms and what are the reported outcomes?After searching for empirical studies on this topic, we examined 186 studies investigating different ways in which teachers can promote inquiry-based education. Analyses revealed varying teaching strategies, differing with regard to direction (teacher directed, student directed and mixed) and different perspectives of regulation (meta-cognitive, conceptual, and social regulation). Results show that important teacher strategies in metacognitive regulation are: focussing on thinking skills, developing a culture of inquiry, supporting inquiry discourse, and promoting nature of science; in conceptual regulation: providing information on the research topic and focussing on conceptual understanding; and in social regulation: bridging the gap between high and low achievers, organizing student learning in groups and focussing on collaboration processes.  相似文献   

Cr12MoV模具钢激光涂层的耐磨性能分析     

陈童  陈用今  马海舟 《中国科技信息》2007,(13):252-253

分析Cr12MoV模具钢激光涂层的耐磨性能。本文通过摩擦磨损实验测出经过激光熔覆处理后的Cr12MoV模具钢耐磨性和没有经过处理的Cr12MoV模具钢耐磨性的数据,再对数据进行计算、观察、分析作出相应的对比曲线图,以此来研究Cr12MoV模具钢图层的耐磨性。  相似文献   

Overexpression of Aldose Reductase Render Mouse Hepatocytes More Sensitive to Acetaminophen Induced Oxidative Stress and Cell Death     

Munzir M. E. Ahmed  J. A. S. Al-Obosi  H. M. Osman  M. E. Shayoub 《Indian journal of clinical biochemistry : IJCB》2016,31(2):162-170

Acetaminophen (APAP) a commonly used drug for decrease the fever and pain but is capable to induced hepatotoxicity at over dose. This study was carried out to investigate the effect of APAP on the expression of anti-apoptotic and antioxidative defense genes, and whether aldose reductase over-expressing plasmid capable to protect against APAP-induced oxidative stress and cell death. APAP treatment induced oxidative stress and hepatotoxicity, and significantly increased aldose reductase mRNA and protein expression in mouse hepatocyte (AML-12). Unexpectedly, AML-12 cells over-expressing aldose reductase augmented APAP-induced reduction in cell viability, reactive oxygen species (ROS) production, glutathione (GSH) depletion and glutathione S-transferase A2 expression. Moreover, over-expression of aldose reductase potentiated APAP induced reduction on proliferating cell nuclear antigen, B cell lymphoma-extra large (bcl-x_L), catalase, glutathione peroxidase-1 (GPx-1) and abolished APAP-induced B-cell lymphoma 2 (bcl-2) inductions. Further, over-expression of aldose reductase significantly abolished AMP activated protein kinase (AMPK) activity in APAP-treated cells and induced p53 expression. This results demonstrate that APAP induced toxicity in AML-12, increased aldose reductase expression, and over-expression of aldose reductase render this cell more susceptible to APAP induced oxidative stress and cell death, this probably due to inhibition AMPK or bcl-2 activity, or may due to competition between aldose reductase and glutathione reductase for NADPH.  相似文献   

血管内皮生长因子和白细胞介素-12在急性白血病中的表达及临床意义     

高丽君  夏薇  杜冰洋 《中国科学院研究生院学报》2007,24(3):368-371

目的 通过检测急性白血病（AL）患者静脉血清中血管内皮生长因子（VEGF）和 白细胞介素12（IL-12）的含量，探讨VEGF和IL-12在急性白血病中的含量及临床意义。方法 应用定量酶联免疫吸附实验测定10例初诊未治、10例缓解期、5例复发患者和9例正常对照血清中VEGF和IL-12的含量。结果 初诊未治组的VEGF含量（521.06±163.85pg/ml）明显高于缓解组（307.62±55.40pg/ml）及对照组（262.01±141.66pg/ml）（p均<0.05）。对照组的IL-12水平（58.96±38.11pg/ml）与初诊复发组（初诊未治组与复发组的合称32.51±14.58pg/ml）、缓解组（71.67±119.09pg/ml）之间均有显著性差异（p均<0.05）。正常对照组VEGF的含量与IL-12之间存在负相关性。结论 VEGF和IL-12与AL的病情变化有一定的关系。  相似文献