Language and reading impairments are associated with increased prevalence of non-right-handedness

Handedness has been studied for association with language-related disorders because of its link with language hemispheric dominance. No clear pattern has emerged, possibly because of small samples, publication bias, and heterogeneous criteria across studies. Non-right-handedness (NRH) frequency was assessed in N = 2503 cases with reading and/or language impairment and N = 4316 sex-matched controls identified from 10 distinct cohorts (age range 6–19 years old; European ethnicity) using a priori set criteria. A meta-analysis (N_cases = 1994) showed elevated NRH % in individuals with language/reading impairment compared with controls (OR = 1.21, CI = 1.06–1.39, p = .01). The association between reading/language impairments and NRH could result from shared pathways underlying brain lateralization, handedness, and cognitive functions.     

移动终端上文献管理工具的比较研究

文献管理工具是一种可以有效提高科研工作者学习研究效率的软件,移动终端上的文献管理工具将用户从PC中解脱出来,让用户可以随时随地阅读、管理参考文献.论文选取五款典型的移动终端上的文献管理工具,采用ISO/IEC9126-2000模型,分别从功能性、效率性、易用性、可移植性四个方面进行比较.最后,针对比较结果,指出目前移动终端的文献参考工具具有网络搜索功能薄弱、共享方式少、检索方式单一和书目信息导出方面的功能缺失等不足.     

图书馆联盟环境下学科服务构思——基于嵌入性理论的视角

泛在知识环境下,现代图书馆开展嵌入式学科服务成为必然发展趋势.论文基于嵌入性理论,对高校图书馆联盟构建机制以及嵌入式学科服务的开展进行探讨,认为高校图书馆联盟应以用户需求为核心,协同合作,构建统一的学科服务平台,协同培育用户驾驭知识、运用知识和创新知识的智慧能力.     

应重视《新华文摘》在宣传图书馆学思想和理论方面的作用

图书馆学思想和理论“走出去”的意识不强.这种现状应引起重视.图书馆学发展需要更多与更好的传播渠道.二次文献《新华文摘》是宣传图书馆学思想的重要渠道之一,被它关注是提升图书馆学话语权的重要途径之一.部分图书馆学文章被《新华文摘》关注,有其合理性.图书馆学文章被《新华文摘》关注度低,说明图书馆学界自身存在较多问题.图书馆学界应解决这些问题,以期更多的图书馆学思想和理论被《新华文摘》关注,从而达到更好地宣传图书馆学思想和理论的目的.     

四旋翼飞行器控制系统研究

本文着重就四旋翼飞行器控制系统的硬件组成、结构和软件算法进行研究。介绍了四旋翼飞行器的组成结构和飞行原理,包括四旋翼飞行器的优势和特点以及今后的应用领域;讨论了控制系统的硬件组成结构及其特点,如主控制器MCU芯片的选择、所需传感器种类的确定、数据传输模块的设计和硬件通信协议的分析;研究了姿态解算的方法,包括捷联惯导系统、姿态解算的四元数方法、互补滤波;研究了四旋翼飞行器的控制方法,采用了经典的PID控制方法,设计偏航、俯仰、滚转的三路并行PID控制器。     

“情景导入，项目导学”在汽车电器与电子设备维修课程中的设计

在汽车电器与电子设备维修教学中,学生需要理解和把握课程要求的知识和技能,培养分析问题和解决问题的思想和方法。本文结合汽车电器与电子设备维修课程的特点,提出“情景导入,项目导学”的教学设计,进一步完善和提高教学模式和教学方法。     

Further result on H∞ filter design for continuous-time Markovian jump systems with time-varying delay

This paper investigates the problem of _H∞$H_{\infty }$ filtering for Markovian jump linear systems with time-varying delay. The aim of this problem is to design an _H∞$H_{\infty }$ filter that ensures stochastic stability of the filtering error system and a prescribed L₂-induced gain from the noise signals to the estimation error, for all admissible uncertainties. For solving the problem, we transform the system under consideration into an interconnection system. Based on the system transformation and the stochastic scaled small gain theorem, stochastic stability of the original system is examined via the stochastic stability version of the bounded realness of the transformed forward system. The merit of the proposed approach lies in its reduced conservatism, which is made possible by a precise approximation of the time-varying delay and the stochastic scaled small gain theorem. The proposed _H∞$H_{\infty }$ filtering condition is demonstrated to be less conservative than most existing results. Moreover, the _H∞$H_{\infty }$ filter design condition is further presented via convex optimizations, whose effectiveness are also illustrated via numerical examples.     

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/).     

创新价值链视角下的我国区域创新效率提升路径研究

本文基于创新价值链视角,将创新过程按阶段分为知识创新、研发创新和产品创新,利用三阶段DEA模型考察了各阶段创新效率。本文研究表明,知识创新整体创新效率为0.582,研发创新整体效率为0.284,产品创新整体效率为0.529,东部地区各阶段创新效率明显高于中西部地区,尤其在研发效率上表现的更加明显。基于以上研究结论,本文利用二维矩阵的方式将各地区各阶段创新效率划分为四种类型,进而不同的地区可以根据自身优势和劣势选择适宜的创新效率提升路径。     

基于Voronoi的微粒群优化的三维无线传感网络节点定位算法的研究

无线传感中的节点定位一直以来都是研究的热门,为了更好的解决三维无线传感空间中节点定位不准确的问题,本文在粒子群算法基础上引入Voronoi模型,将三维空间中的节点的定位问题归纳为目标函数的最优解,证明了Voronoi模型的赋权值边存在敏感点的定理,通过定理的应用获得了目标函数的最优解,有效解决了节点定位问题。仿真实验表明,本文的算法优于对比算法具有更好的健壮性,提高了定位精度。