空气质量响应曲面模型在杭州市的应用     

戴志翔  胡诗玮  罗坤  高翔  樊建人  岑可法 《中国科学院大学学报》2017,34(2):179-185

基于CMAQ模拟结果,统计、归纳出各种污染物排放控制因子与污染物浓度之间的函数关系,建立空气质量响应曲面模型RSM,通过留一法交叉验证和外部验证对模型进行可靠性验证。使用RSM,研究不同污染物的PM_2.5响应值,评估现有政策不变（Ⅰ）和政策收紧（Ⅱ）两种减排情景,发现NO_X、SO₂、NH₃和VOC对PM_2.5浓度体现明显的非线性响应特征,情景Ⅱ的减排效果明显好于情景Ⅰ,夏季的减排效果好于冬季。  相似文献   

文克尔地基薄板的瞬态响应分析     

颜可珍  夏唐代 《科技通报》2006,22(1):90-94,100

利用级数展开法和Laplace--Fourier变换推导了文克尔地基上无限长板在半波正弦瞬态荷载作用下位移和应力的解析解。计算和分析了板的位移响应情况,并和弹性地基静荷载情况的位移进行了比较,讨论了荷载作用时间、地基参数及板参数等对位移响应的影响。对路面设计、品质评价及破坏机理分析有重要意义。  相似文献   

新媒体时代的人格权保护 ——以回应权为中心     

张洁 《襄阳职业技术学院学报》2021,(1):109-113

回应权是新媒体时代公众人物维护自己名誉利益的重要权利类型.未来回应权的塑形,应把握回应权彰显的双重伦理价值,适当扩张回应权的权利主体和义务主体,在适用对象上,弱化对事实陈述和意见表达的区分,明确回应权的具体适用规则和法律责任,并将回应权作为一种独立的民事权利置于未来的民法典人格权编中.  相似文献   

Validity Issues in Test Speededness     

Ying Lu  Stephen G. Sireci 《Educational Measurement》2007,26(4):29-37

Speededness refers to the situation where the time limits on a standardized test do not allow substantial numbers of examinees to fully consider all test items. When tests are not intended to measure speed of responding, speededness introduces a severe threat to the validity of interpretations based on test scores. In this article, we describe test speededness, its potential threats to validity, and traditional and modern methods that can be used to assess the presence of speededness. We argue that more attention must be paid to this issue and that more research must be done to set appropriate time limits on power tests so that speed of responding does not interfere with the construct measured.  相似文献   

农村水利设施的善治逻辑与制度回应     

罗诚  秦鹏 《中国软科学》2015,(6)

农村水利设施的治理应契合农村公共物品的善治逻辑,即以农村水利设施所具有的公共物品属性为逻辑起点,以社会公共利益最大化为价值旨归,以实现民主协商为本质要求。针对农村水利设施目前存在的现实困境,亟需构建“上下结合”的多中心治理模式,建立多层次多渠道筹资机制,明晰产权规范,创新监管制度,采用水联网,完善评估与考核制度等作为制度回应。  相似文献   

Responding to literature through storytelling,artifacts and multigenre writing practices: explorations of cultures and self          下载免费PDF全文

Kinga Varga‐Dobai 《Literacy》2015,49(2):77-83

  相似文献   

环境群体性事件的应急响应协同研究     

何怡平 《情报探索》2015,(1):125-127

引入环境群体性事件应急响应协同理论模型。以"厦门PX项目事件"为例,从权力、合法性与紧急性3个维度和7组利益相关者(包括单重属性的潜在型、随意型、苛求型,双重属性的支配型、依赖型、危险型,以及三重属性的决定型)的角度,对该理论进行实证分析,并从运作和政策层面对各利益相关者所处地位、行为模式进行探讨,以动态视角分析利益相关者的演变态势及其可能性。  相似文献   

地理信息系统专业遥感课程建设中的教学与科研互动关系探析   总被引：1，自引：1，他引：0  

张飞  丁建丽  买买提·沙吾提 《高等教育研究学报》2011,34(2):69-71

教学是立校之本,科研是强校之路,教学中有研究,在研究中教学。本文在分析地理信息系统专业遥感课程教学现状与人才培养矛盾的基础上,提出了新疆大学遥感专业教师应结合学校自身实际及教学内容,树立科研育人的理念,深化课程教学改革;通过教学、科研、学生能力培养以及成果产业化四互动,为提高遥感课程教学质量,培养实践创新型遥感人才的教学改革提供新思路,以使学生在多种育人方式和科研环境中得到全面发展。  相似文献   

Modeling Growth in Electronic Learning Environments Using a Longitudinal Random Item Response Model     

Damazo T. Kadengye  Eva Ceulemans  Wim Van Den Noortgate 《Journal of Experimental Education》2015,83(2):175-202

In educational environments, monitoring persons' progress over time may help teachers to evaluate the effectiveness of their teaching procedures. Electronic learning environments are increasingly being used as part of formal education and resulting datasets can be used to understand and to improve the environment. This study presents longitudinal models based on the item response theory (IRT) for measuring persons' ability within and between study sessions in data from web-based learning environments. Two empirical examples are used to illustrate the presented models. Results show that by incorporating time spent within- and between-study sessions into an IRT model; one is able to track changes in ability of a population of persons or for groups of persons at any time of the learning process.  相似文献   

‘Twilight or Middlemarch?’ A Teacher’s Refusal to Choose     

Sandhya P. Singh 《Changing English: An International Journal of English Teaching》2015,22(1):3-13

What should children and young adolescents read? Recent changes in the English curriculum have once again shifted the focus towards more canonical texts, but does featuring such texts on the course necessarily equate to rigorous teaching and in-depth learning? Through a self-examination of her own reading history, the author argues for a dialogic approach to reading and text selection instead, so that students may negotiate better understandings of themselves and their own socio-cultural contexts.  相似文献