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排序方式: 共有502条查询结果,搜索用时 15 毫秒
471.
国际高等教育研究主题的流变   总被引:5,自引:0,他引:5  
高等教育研究主题的演变,在很大程度上反映了高等教育自身发展的特点和要求.从空间上看,北美(主要是美国)及北美以外(主要是欧洲)高等教育研究的主题也呈现某些差异性.高等教育研究主题的历史变化和地域上的差异性,从一个侧面反映了高等教育作为一个研究领域的开放性、跨学科的特点.  相似文献   
472.
《Research Policy》2019,48(9):103830
This paper depicts how cultural resonance for novel technologies is constructed as a gradual, interactive process. We adopt a cultural framing perspective and strive to understand how actors assign meaning to the novel technology and determine its appropriateness for the local context. Existing research has largely focused on the strategic and political aspects of field framing processes through depicting conscious framing struggles between protagonist and antagonist actors. In addition to such strategic framing activities, we examine how other socio-cultural factors, such as changes in actor positions, interaction between framing activities, and the cultural “repertoire” of frames interact in producing cultural resonance. For our empirical case study, we followed the emerging technological field of solar energy during an intensive period of change. Our study contributes to the growing number of studies that draw attention to the creation of cultural resonance as an interactive multi-actor process by offering in-depth understanding of the multifaceted interactions that constitute the meaning-making process for an emerging field.  相似文献   
473.
采用文献资料法、专家访谈法和问卷调查法等研究方法,结合高校体育教学指导思想、《全国普通高等学校体育课程教学指导纲要》的要求和高校体育休闲化的发展趋势,从高校体育“田径课程“教学内容、教学组织形式和教学评价等三个方面对高校体育“田径课程“教学休闲化进行探讨。  相似文献   
474.
采用现场可编程门阵列FPGA技术实现数字信号处理,可以很好地解决并行性、可配置性和速度问题。循环码是线性分组纠错码的一个子集,它具有防止突发错误的保护功能。提出了采用硬件描述语言进行设计输入的优点,给出了基于FPGA的一种系统循环码、编码器、译码器。以及m序列发生器的实现办法。  相似文献   
475.
We propose a new finite mixture model for clustering multiple-field documents, such as scientific literature with distinct fields: title, abstract, keywords, main text and references. This probabilistic model, which we call field independent clustering model (FICM), incorporates the distinct word distributions of each field to integrate the discriminative abilities of each field as well as to select the most suitable component probabilistic model for each field. We evaluated the performance of FICM by applying it to the problem of clustering three-field (title, abstract and MeSH) biomedical documents from TREC 2004 and 2005 Genomics tracks, and two-field (title and abstract) news reports from Reuters-21578. Experimental results showed that FICM outperformed the classical multinomial model and the multivariate Bernoulli model, being at a statistically significant level for all the three collections. These results indicate that FICM outperformed widely-used probabilistic models for document clustering by considering the characteristics of each field. We further showed that the component model, which is consistent with the nature of the corresponding field, achieved a better performance and considering the diversity of model setting also gave a further performance improvement. An extended abstract of parts of the work presented in this paper has appeared in Zhu et al. [Zhu, S., Takigawa, I., Zhang, S., & Mamitsuka, H. (2007). A probabilistic model for clustering text documents with multiple fields. In Proceedings of the 29th European conference on information retrieval, ECIR 2007. Lecture notes in computer science (Vol. 4425, pp. 331–342)].  相似文献   
476.
郑娟 《中国科技信息》2009,(16):274-275
<电磁场与电磁波>是我校电子信息工程专业与通信工程专业一门重要的专业基础课程.由于本课程理论知识偏多,学生缺乏学习兴趣,因此,教学改革迫在眉睫.本文从培养学生学习兴趣入手,对教学内容,教学方式和考核方案的改革进行了探讨,以便使学生在掌握必要的电磁场与电磁波基本理论的同时提高学生综合分析问题和解决问题的能力.  相似文献   
477.
Multidisciplinary teams are an essential aspect of modern organizational work. These teams often work in information-rich environments but little is known about their collaborative information seeking (CIS) behavior. We have been studying the CIS behavior of teams in the context of medical care. We conducted an ethnographic field study of a multidisciplinary patient care team in an emergency department to identify (a) team information needs and (b) situations that trigger collaborative information seeking activities. We identified seven categories of information needs as expressed by questions asked by team members. The majority of questions focused on medical information, but there were a larger than expected percentage of questions focusing on organizational information. We also identified three triggers for CIS activities. These triggers are: (1) lack of expertise, (2) lack of immediately accessible information, and (3) complex information needs. The questions and triggers highlight the importance of face-to-face communication during CIS activities and how CIS activities could lead to interruptive workplaces. We also discuss organizational and technical implications for supporting CIS behavior of teams.  相似文献   
478.
心理场理论   总被引:8,自引:0,他引:8  
场是能量的混合。自然界的自然界中物体能量的混合。通过场,事物之间发生着交互作用,接收和发射着能量。心理场是心理与物体之间形成的场,具有有机化合性、辐射性、变化性、惯性敏感性。自然因素和社会因素是影响心理场的重要因素。  相似文献   
479.
本文对第27届奥运会田径比赛进行了较详细的分析,总结了本届奥运会田径比赛的特点,分析了主要国家运动员的表现和实力,并对中国田径运动的发展提出了中肯的建议和希望。  相似文献   
480.
华北春旱年型对冬小麦影响的模拟试验   总被引:17,自引:1,他引:16  
利用大型活动式遮雨棚遮档自然降水,采用人工控制定量喷灌模拟冬小麦生产中3、5、7、10、14a-遇的春旱年型,研究不同春旱年型对冬小麦不同生长发育阶段和产量的影响。试验结果表明:随着春旱年型的增加,冬小麦根、茎、叶、的生长速度明显降低,总生物量减少;春季干旱使冬小麦春生分蘖减少,单位面积总穗数减少,穗长变短,穗粒数减少,千粒重降低,不孕小穗数增加;3、5、7、10、14a-遇春旱处理的冬小麦产量分别比CK减少2.6%、14.6%、22.1%、43.0%、47.2%。春季干旱程度与冬小麦产量呈指数曲线相关。  相似文献   
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