天下第一雄关嘉峪关

看到嘉峪关的第一眼,我就觉得此行不虚了。连日来行进在茫茫的戈壁滩上,黄沙浩浩,树与水变成稀罕物,由此我以为嘉峪关也是一片漠漠的黄色,没想到嘉峪关居然是这样的水秀树明,仿佛回到了江南!嘉峪山谷不仅美好,而且地势险要。它南有终年积雪的祁连山,北是     

Prevalence and correlates of meeting the muscle-strengthening exercise recommendations among Chinese children and adolescents: Results from 2019 Physical Activity and Fitness in China—The Youth Study

PurposeThis study aimed to describe the national prevalence of Chinese children and adolescents who met the World Health Organization muscle-strengthening exercise (MSE) recommendations and identify correlates of meeting the MSE recommendations.MethodsCross-sectional data from the 2019 Physical Activity and Fitness in China—The Youth Study, a nationally representative sample of Chinese children and adolescents (n = 80,413; mean age = 13.7 years; 53.9% girls) and their parents, were analyzed. Children and adolescents who reported engaging ≥3 days (up to 7 days) of MSE per week were classified as meeting the MSE recommendations. MSE, demographics, lifestyle behaviors (sport participation, moderate-to-vigorous physical activity, screen time, and sleep duration), exercise intention, peer and parental support, and parental MSE participation were assessed through self-reports. Logistic regression models were used to determine the correlates of meeting the MSE recommendations. The analyses were completed in 2020.ResultsOverall, 39.3% of children and adolescents met the MSE recommendations. Girls, 10th–12th graders, minorities, those from lower income households and those from families with lower parental education were less likely to meet the MSE recommendations. Children and adolescents who were proficient in ≥2 sports were more likely to meet the MSE recommendations (adjusted odds ratio (aOR) = 1.44, 95% confidence interval (95%CI): 1.26–1.65), as were those with more moderate-to-vigorous physical activity (aOR = 1.57, 95%CI: 1.53–1.61). Additionally, children and adolescents with high exercise intention (aOR = 1.60, 95%CI: 1.51–1.69), those whose parents met the adult MSE recommendations (aOR = 1.46, 95%CI: 1.40–1.52), and those who received high peer (aOR = 1.27, 95%CI: 1.20–1.34) and parental support (aOR = 1.07, 95%CI: 1.04–1.12) were more likely to meet the MSE recommendations.ConclusionLess than two-fifths of Chinese children and adolescents met the World Health Organization MSE recommendations. The correlates identified in our study can help inform the development of school and community based strategies and policies to enhance participation in MSE and improve muscular fitness of all Chinese children and adolescents.     

试析我校评估前图书资料资产清点工作

介绍了作者所在图书馆的图书资料资产清点工作的一些经验,意在为其他馆提供借鉴。     

探析高校多校区图书馆读者工作的转变与发展——以华侨大学图书馆为例

高校建立分校后,出现了多校区图书馆,其读者服务工作呈现类型复杂、分布广等特点。文章就信息时代多校区图书馆文献资源建设和开创图书馆读者工作新局面,提出若干思路与对策。     

论现代图书馆信息服务的创新

阐述了图书馆信息服务创新的三大动力,构建了信息服务创新的内容,指出了信息服务创新的的保障条件。     

高校图书馆中跨库检索系统面临的问题及对策

电子资源的日益增多以及检索界面的纷杂性使用户对电子资源的利用受到了影响.文章在对目前高校图书馆跨库检索系统所面临的问题和电子资源检索界面现状进行分析的基础上,提出了完善高校图书馆跨库检索系统的方案,并讨论了标准化跨库检索系统的优点及其重要意义.     

基于风热环境评估的城市通风廊道设计研究——以绍兴市越城区为例

在城市气候问题持续恶化与精细化城市管理背景下,对城市风热环境的综合评估将为城市通风廊道构建及城市规划提供重要前提.本文利用遥感和地理信息技术,以浙江省中等城市绍兴越城区为研究对象,综合分析绍兴越城区的风环境和热环境,并在通风廊道规划中给出了构建策略.研究结果表明:(1)绍兴越城区全年主导风向为偏东风,近10年平均风速呈...     

Achieving ultrahigh electrochemical performance by surface design and nanoconfined water manipulation

The effects of nanoconfined water and the charge storage mechanism are crucial to achieving the ultrahigh electrochemical performance of two-dimensional transition metal carbides (MXenes). We propose a facile method to manipulate nanoconfined water through surface chemistry modification. By introducing oxygen and nitrogen surface groups, more active sites were created for Ti₃C₂ MXene, and the interlayer spacing was significantly increased by accommodating three-layer nanoconfined water. Exceptionally high capacitance of 550 F g^–1 (2000 F cm^–3) was obtained with outstanding high-rate performance. The atomic scale elucidation of the layer-dependent properties of nanoconfined water and pseudocapacitive charge storage was deeply probed through a combination of ‘computational and experimental microscopy’. We believe that an understanding of, and a manipulation strategy for, nanoconfined water will shed light on ways to improve the electrochemical performance of MXene and other two-dimensional materials.     

基于无效和规避视角的专利价值评价研究

从法律角度出发,认为专利的价值在于专利权人是否能够有效的行使该权利.专利权的行使一般包括专利权的实施或许可,以及侵权的防止.对于后者,影响的因素包括专利权的保护范围,专利权的稳定性(即是否容易被无效)以及他人是否能够通过设计规避专利权.通过两个案例的分析,分别从专利无效和专利规避角度考察专利的特性,由此提供一个透视专利...     

地方高师院校课程设置状况个案研究

文章以两所地方高师院校的现状调查为例,分析了当前高师院校人才培养在课程设计、教学管理等方面存在的问题与不足,并由此提出了优化课程结构、强化实践环节、健全教学管理机制等若干条建设性的思路与对策。