学前教育中羌文化传承的“生态语境”与“叙事体验”探究

羌文化是多元文化中的重要一支,却面临着羌语濒危,文化主体、文化传承“生态语境”缺失,文化传承行为严重失衡等现实困境.学前儿童是未来文化主体,教育是人类文化得以传承的主要途径,学前教育是实施民族文化传承教育的关键期和重要期,学前教育中羌文化传承“语境”损毁而导致羌文化传承教育弱化.因此,塑造学前教育羌文化传承的“生态语境”,突围羌文化传承困境,实施学前儿童羌文化传承“叙事体验”教育,是学前教育羌文化传承的有效建设和重要驱动.     

Examining the Rule of Thumb of Not Using Multilevel Modeling: The “Design Effect Smaller Than Two” Rule

Educational researchers commonly use the rule of thumb of “design effect smaller than 2” as the justification of not accounting for the multilevel or clustered structure in their data. The rule, however, has not yet been systematically studied in previous research. In the present study, we generated data from three different models (which differ in the location of the clustering effect). With a 3 (design effect) × 5 (cluster size) × 4 (number of clusters) Monte Carlo simulation study we found that the rule should not be applied when researchers: (a) are interested in the effects of higher-level predictors, or (b) have a cluster size less than 10. Implications of the findings and limitations of the study are discussed.     

概念性理解视角下的小学数学教材比较研究--以“分数除法”为例

分数除法不仅是培养学生数感及运算能力的良好素材,也是培养学生代数推理能力的重要载体。分数除法的概念性理解对小学生来说具有一定的挑战性。选取中国、美国,新加坡、英国的小学数学教材,对分数除法算法建构的过程进行比较研究。结果表明,各个版本的教材在分数除法部分渗透的推理类型有较大差异,中国及新加坡教材在概念性理解方面的要求高于美国与英国教材。     

家有爱磨蹭的娃

作为宝爸宝妈,以下场景应该不陌生吧. 情景一 今年5岁的小宝每天都上幼儿园.早上8点,妈妈使出浑身解数把小宝叫醒后,嘱咐他把准备好的衣裤袜子换上,然后洗脸刷牙吃早餐,接着小宝妈妈忙早餐去了. 10分钟过去,妈妈进来视察,发现小宝还坐在床上发呆.好不容易把小宝打发去刷牙,又发现小宝对着镜子挤眉弄眼哼哼哈哈地刷牙,全然不知...     

The development and assessment of counting-based cardinal number concepts

Educational Studies in Mathematics - The give-n task is widely used in developmental psychology to indicate young children’s knowledge or use of the cardinality principle (CP): the last...     

矿山企业管控一体化的研究与实现

如何实现经营决策、生产过程管理和过程控制的管控一体化,是矿山企业适应国际化市场竞争的必由之路。本文首先介绍了矿山实施管控一体化的必要性,然后对国外管控一体化建设情况进行了分析和总结,最后以一家矿业公司为例,从该企业信息化现状出发,借鉴其他企业的成功经验,提出了矿山企业管控一体化的解决方案。     

Disambiguation and co-authorship networks of the U.S. patent inventor database (1975–2010)

Research into invention, innovation policy, and technology strategy can greatly benefit from an accurate understanding of inventor careers. The United States Patent and Trademark Office does not provide unique inventor identifiers, however, making large-scale studies challenging. Many scholars of innovation have implemented ad-hoc disambiguation methods based on string similarity thresholds and string comparison matching; such methods have been shown to be vulnerable to a number of problems that can adversely affect research results. The authors address this issue contributing (1) an application of the Author-ity disambiguation approach (0170 and 0175) to the US utility patent database, (2) a new iterative blocking scheme that expands the match space of this algorithm while maintaining scalability, (3) a public posting of the algorithm and code, and (4) a public posting of the results of the algorithm in the form of a database of inventors and their associated patents. The paper provides an overview of the disambiguation method, assesses its accuracy, and calculates network measures based on co-authorship and collaboration variables. It illustrates the potential for large-scale innovation studies across time and space with visualizations of inventor mobility across the United States. The complete input and results data from the original disambiguation are available at (http://dvn.iq.harvard.edu/dvn/dv/patent); revised data described here are at (http://funglab.berkeley.edu/pub/disamb_no_postpolishing.csv); original and revised code is available at (https://github.com/funginstitute/disambiguator); visualizations of inventor mobility are at (http://funglab.berkeley.edu/mobility/).     

基于项目驱动的DACUM模型Java课程开发建设研究

Java语言是目前流行的一种网络编程语言,但是涉及的知识点多,入门难,高职学生基础较薄弱,学习主动性不太高,容易遇难而退。针对这一问题本文说明了项目驱动教学的重要性,根据DA-CUM模型分析介绍了项目驱动的java课程教学模式,从课程设计、课程群建设、考核方式改革、教学资源建设等方面讨论了项目驱动的DACUM模型Java课程建设应解决的相关问题,给出了贯穿式项目教学的教学设计方案,基于DACUM模型分析设置了java课程群建设相关的java、java高级编程、jsp等系列课程,具体分析并提出了项目驱动的DACUM模型《JAVA编程基础》考核方案。通过实践表明,本文所提出的基于项目驱动的DACUM高职java课程开发与建设,能够有效的加强高职院校对于java课程的教学,具有很强的拓展性,适用性很好。     

特殊行业中人员高危行为视觉监控系统仿真

在一些高危的特殊行业中,操作人员的行为是否规范,一直是行业监督的重点。传统的监控方法以人工监控为主,无法做到高效与及时,为此提出一种特殊行业中操作人员高危行为视觉监控系统方案。利用员工操作区域固定场景采集操作人员行为图像,通过图像预处理、人体姿态定位与标准模式阀值识别等相关技术手段设计实现了一套特殊行业中操作人员高危行为视觉监控模型。在识别过程中通过利用手部姿态、相关货物飞行的位置关系与手臂连线的灰度直方图构建特征向量,完成判断。以物流行业为例,仿真实验表明,该方法取得了较好的识别效果,可以对物流分拣过程的标准化过程进行有效的监控。     

Tandem array of nanoelectronic readers embedded coplanar to a fluidic nanochannel for correlated single biopolymer analysis

We have developed a two-step electron-beam lithography process to fabricate a tandem array of three pairs of tip-like gold nanoelectronic detectors with electrode gap size as small as 9 nm, embedded in a coplanar fashion to 60 nm deep, 100 nm wide, and up to 150 μm long nanochannels coupled to a world-micro-nanofluidic interface for easy sample introduction. Experimental tests with a sealed device using DNA-protein complexes demonstrate the coplanarity of the nanoelectrodes to the nanochannel surface. Further, this device could improve transverse current detection by correlated time-of-flight measurements of translocating samples, and serve as an autocalibrated velocimeter and nanoscale tandem Coulter counters for single molecule analysis of heterogeneous samples.