The development and assessment of counting-based cardinal number concepts     

Baroody  Arthur J.  Lai  Menglung 《Educational Studies in Mathematics》2022,111(2):185-205

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...  相似文献   

矿山企业管控一体化的研究与实现     

赖路燕 《科技广场》2014,(9)

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。  相似文献   

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

Guan-Cheng Li  Ronald Lai  Alexander D’Amour  David M. Doolin  Ye Sun  Vetle I. Torvik  Amy Z. Yu  Lee Fleming 《Research Policy》2014

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/).  相似文献   

基于项目驱动的DACUM模型Java课程开发建设研究     

朱红英  赖蘋华  宫晓曼 《科技通报》2014,(11)

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。  相似文献   

特殊行业中人员高危行为视觉监控系统仿真     

赖蘋华 《科技通报》2014,(12)

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。  相似文献   

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

Leonardo Lesser-Rojas  K. K. Sriram  Kuo-Tang Liao  Shui-Chin Lai  Pai-Chia Kuo  Ming-Lee Chu  Chia-Fu Chou 《Biomicrofluidics》2014,8(1)

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.  相似文献   

“校企合作”背景下的聋生高职实训基地建设探讨--以浙江省聋生装饰设计专业为例     

赖立香 《科教文汇》2014,(16):181-182,186

实训基地建设是高职实践教学的重要场所,也是实现高职教育目标的必要条件。本文列出了浙江省聋生装饰艺术设计专业实训基地建设过程中存在的一些问题,结合具体的实践探索提出了一些建议以供探讨。  相似文献   

物流管理专业教改的思路研究     

赖菲 《科教文汇》2014,(27):90-91

近年来,随着物流产业的快速发展,各大高校纷纷设立与之相关的专业。但是,我国高校物流管理专业存在着起步晚、发展慢、投入不够、教学资源缺乏、师资力量不足等问题。因此,进行物流管理专业教改是十分迫切和必要的。  相似文献   

马琳在北京奥运会乒乓球比赛中的技战术运用分析     

程虹  白洁  钱来 《体育科技文献通报》2010,18(6):29-31

本文通过文献资料法、录像观察法、数理统计法、分段指标评估法,对马琳在北京奥运会比赛中的技战术进行了较深入的分析,得出结论：马琳的发抢优势明显,高质量的抢攻质是取得比赛胜利的关键。接发球段发挥最为稳定,是马琳取得比赛胜利的基础保障。相持段是马琳的薄弱环节;马琳在开局和尾局的战术运用过于保守;正手进攻能力突出,反手位特别是中远台进攻能力还有待进一步提高。  相似文献   

赣南采茶舞蹈中独特的动作审美   总被引：1，自引：0，他引：1  

赖丹  叶曾珍 《科技广场》2010,(4):23-26

中国的民间舞蹈文化博大精深、源远流长、色彩斑斓,其中赣南采茶舞蹈更是标新立异,其独特的舞蹈动作是表达民间文化艺术中不可缺少的重要元素,使得赣南采茶舞蹈大放异彩.黑格尔曾经说过:"能够把个人的性格思想和目的最清楚的表现出来的是动作,人最深刻方面只有通过动作才能见诸现实",从美学角度分析,又可认为动作是直接表达给观众的,它有着独立的审美价值.  相似文献