细颗粒物(PM_(2.5))对农村环境空气质量评价的影响分析     

黎宁  秦旭芝  李传章  韦锋  夏新建 《大众科技》2015,(6)

为了评估细颗粒物(PM2.5)监测对农村空气质量等级的影响,2014年在3个村庄监测了二氧化硫(SO2)、二氧化氮(NO2)、吸入性颗粒(PM10)和细颗粒物(PM2.5)等污染指标,使用环境空气质量标准(GB 3095-2012)和环境空气质量指数(AQI)法进行评价。结果显示:农村环境空气质量评价等级在细颗粒物(PM2.5)纳入评估后有所降低,等级为优的比例从29.7%下降到1.7%,等级为良的比例从70.3%提高到95.0%,同时轻微污染的比例从0提高到3.3%。环境空气质量指数(AQI)法对空气污染物有了更准确的评价,能评估未超标情况下空气污染物对空气质量的贡献程度。PM2.5与PM10有显著的正相关关系。  相似文献   

“ESP”理论视角下的大型国际赛事体育英语翻译现状分析     

杨飞 《成都体育学院学报》2015,(3):64-67

在国际赛事大力发展的今天,在国内举办的大型国际体育赛事也得到了长足的发展,与此同时国内体育英语翻译人才匮乏也逐渐凸显。基于此背景,文章以国内开展大型国际体育赛事为例,运用 ESP理论（English for Specific Purpose 专门用途英语）对体育英语的自身特点进行研究,分析大型体育赛事中体育英语翻译面临的主要问题,并提出相应的发展对策,以期为培养大型体育赛事体育英语翻译人才提供一个全新的视角。  相似文献   

马克思社会进步评价尺度及其实践要求     

黄元丰  王红光 《怀化学院学报》2015,(6)

社会发展进步评价尺度思想是马克思社会发展理论的重要内容,它包括两个基本的尺度,生产力发展尺度和人的发展尺度。两种社会进步既有一致性,又有不一致的地方,这要求我国在社会发展实践及其评价中,要把握生产力尺度和人的尺度之间的辩证统一,凸显人的发展尺度的重要价值,建立社会进步的综合评价尺度,用来指导和评价我国的社会发展实践。  相似文献   

硒与胃癌临床研究国内文献质量评价          下载免费PDF全文

王雪梅  刘莉 《情报工程》2015,1(3):038-042

目的：通过对国内有关硒与胃癌关系研究的文献进行分析,了解目前国内相关研究现状,且为临床医生提供循征医学证据。方法：在中国知网、万方等数据库中检索有关硒与胃癌研究的文献,并运用循征医学评价方法——Jadad 量表,对文献质量及目前研究情况进行分析。结果：经手工和电子数据库检索共得国内硒与胃癌关系研究的文献488 篇,纳入研究的文献283 篇,经Jadad 量表对其进行评价,得到0 分的文献共271 篇（95.76%）,1 分的文献共11 篇（3.89%）,2 分的文献1 篇（0.35%）,大于3分的文献未见。结论：我国有关硒与胃癌关系的临床研究文献质量总体水平较低,有待进一步提高。  相似文献   

中国商业银行保持适度规模发展的研究——基于银行业饱和度与系统性风险的分析   总被引：1，自引：0，他引：1  

陆岷峰  张惠 《衡阳师范学院学报》2011,32(1):42-49

近年来,中国商业银行规模急聚扩大,在促进经济快速发展的同时也积聚了相当的风险。对中国商业银行饱和度、系统性风险及风险控制能力的客观评估都涉及到中国金融发展的战略问题。作者认为,当前中国商业银行规模存在局部过度饱和以及较大系统性风险,保持中国商业银行规模适度、协调发展,不断优化中国的商业银行结构,推进利率市场化进程等是保持中国金融健康发展的有效保证。  相似文献   

Development and validation of the short use of creative cognition scale in studying     

Jekaterina Rogaten 《教育心理学》2015,35(3):294-314

This paper reports the development and validation of a short Use of Creative Cognition Scale in Studying (UCCS) that was inspired by the Cognitive Processes Associated with Creativity (CPAC) scale. In Study 1, items from two of the six subscales of the CPAC were excluded due to conceptual and psychometric issues to create a 21-item CPAC scale, which was administered to 517 university students. Exploratory factor analysis revealed that the 21-item CPAC scale is unidimensional. Five items were selected to create the new unidimensional UCCS. In Study 2, 696 students completed the UCCS and a set of scales measuring related constructs. Confirmatory factor analysis corroborated the unidimensional structure of the scale. The scale correlated positively with measures of flow, trait intrinsic motivation, adaptive metacognitive traits and positive affect, it correlated negatively with negative affect, and it did not correlate with core maladaptive metacognitive traits. The findings indicate that the scale is a valid and reliable tool for research and monitoring.  相似文献   

Action at an attentional distance: A study of children's reasoning about causes and effects involving spatial and attentional discontinuity     

Tina A. Grotzer  S. Lynneth Solis 《科学教学研究杂志》2015,52(7):1003-1030

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Student engagement scale: development,reliability and validity     

Selim Gunuc  Abdullah Kuzu 《Assessment & Evaluation in Higher Education》2015,40(4):587-610

In this study, the purpose was to develop a student engagement scale for higher education. The participants were 805 students. In the process of developing the item pool regarding the scale, related literature was examined in detail and interviews were held. Six factors – valuing, sense of belonging, cognitive engagement, peer relationships (emotional engagement-I), relationships with faculty members (emotional engagement-II) and behavioural engagement within the scope of the components of campus engagement and class engagement – made up of 41 items were identified. The total variance explained was 59%. A higher student engagement score was regarded as an indicator that the student had a high level of engagement with the university, campus and class, while a lower score demonstrated that the student’s engagement with the campus and class was weak or that disengagement could occur.  相似文献   

Revisiting Zhang’s scale of transactional distance: refinement and validation using structural equation modeling     

Ravi C. Paul  William Swart  Aixiu Monica Zhang  Kenneth R. MacLeod 《Distance Education》2015,36(3):364-382

Transactional distance has been defined as barriers to students’ engagement with learning in the online environment. This research updates Zhang’s (2003) scale of transactional distance, which quantified the extent of the barriers, in light of the massive changes in today’s web-based learning environment. The resulting revised scale of transactional distance (RSTD) is a parsimonious version with 12 elements (compared to 31 original) that measure the transactional distance between student and teacher, student and student, and student and content. The RSTD has excellent factorial validity and reliability, yields better fit statistics, and is easier and less time-consuming to apply. The transactional distance values are unique predictors of student satisfaction, which is correlated to learning and persistence (a major concern with massive open online courses). This information can form the basis for a systematic approach to improving the design of today’s contemporary open, flexible, distance education courses and thus serve as a valuable tool for researchers and educators alike.  相似文献   

图书馆焦虑量表在高校图书馆的应用研究     

马 崴刘凤侠  刘婷婷 《情报探索》2014,(1):130-132

利用修订后的中文图书馆焦虑量表对沈阳农业大学本科学生进行取样测试,发现现今大学生的图书馆焦虑确实存在,并分析了大学生的图书馆焦虑状况,提出了改进高校图书馆服务方式的对策。  相似文献