电路板设计中的若干技术问题探讨     

王秋芳 《洛阳师范学院学报》2004,23(5):24-26

本文叙述了电路板设计中各步骤的注意事项及如何在较短时间内设计出符合用户需要、质量可靠的电路板 .  相似文献   

Tweeting Facts,Facebooking Lives: The Influence of Language Use and Modality on Online Source Credibility     

Gamze Yilmaz  Jessie M. Quintero Johnson 《Communication Research Reports》2016,33(2):137-144

The present study examines how language use (e.g., personalized vs. depersonalized language) and modality (e.g., tweets vs. Facebook status updates) influence source credibility interdependently. A total of 257 participants read personalized or depersonalized health messages embedded in mock-up tweets or Facebook status updates. The results show that users perceive depersonalized tweets as more credible than depersonalized status updates posted on Facebook. On the other hand, personalized status updates on Facebook generate higher credibility judgments than personalized tweets. The findings are discussed in light of the MAIN model as well as the preconceived user expectations and communication norms of social media.  相似文献   

Performance differences when using 26- and 29-inch-wheel bikes in Swiss National Team cross-country mountain bikers     

Thomas Steiner  Beat Müller  Thomas Maier  Jon Peter Wehrlin 《Journal of sports sciences》2016,34(15):1438-1444

The purpose of this study was to analyse the effect of bike type – the 26-inch-wheel bike (26“ bike) and the 29-inch-wheel bike (29“ bike) – on performance in elite mountain bikers. Ten Swiss National Team athletes (seven males, three females) completed six trials with individual start on a simulated cross-country course with 35 min of active recovery between trials (three trials on a 26“ bike and three trials on a 29“ bike, alternate order, randomised start-bike). The course consisted of two separate sections expected to favour either the 29“ bike (section A) or the 26“ bike (section B). For each trial performance, power output, cadence and heart rate were recorded and athletes’ experiences were documented. Mean overall performance (time: 304 ± 27 s vs. 311 ± 29 s; P < 0.01) and performance in sections A (P < 0.001) and B (P < 0.05) were better when using the 29“ bike. No significant differences were observed for power output, cadence or heart rate. Athletes rated the 29“ bike as better for performance in general, passing obstacles and traction. The 29“ bike supports superior performance for elite mountain bikers, even on sections supposed to favour the 26“ bike.  相似文献   

C语言的指针   总被引：1，自引：0，他引：1  

杨素英 《大连大学学报》1997,(2)

以具体实例详细介绍了C语言指针复杂说明的理解方法;分析指针使用中的常见错误及解决方法;利用指针和动态分配函数实现程序运行中堆的自由空间的支配和释放。  相似文献   

具有非期望输出决策单元的有效性评价     

边馥萍  杨爱萍 《天津大学学报(英文版)》2002,8(4):295-298

针对具有非期望输出决策单元DMU的相对有效性 ,提出对其进行评价的非径向FDEA模型 ,并给出模型的相对有效性理论证明 .结合实际算例 ,指出FDEA模型在实际生产过程中对于节约生产资源 ,提高期望输出 ,降低非期望输出 ,特别是减少环境污染有重要应用价值 .  相似文献   

安徽R&D投入产出水平的实证分析     

王俊 《中国科技资源导刊 (中国信息导报)》2016,(5):13-18

在国内外的研究基础上,结合安徽特有的基本情况,建立了一套评价安徽省各市R&D投入产出综合水平指 标体系,运用主成分分析和聚类分析,客观的评价了安徽省各地市R&D投入产出水平。评价结果表明,“合芜蚌”试验 区引领带动着全省R&D投入产出水平,“皖江带”城市R&D投入产出水平两极分化严重,而“皖北”地区则有崛起的势 头,从而为各市提升R&D投入产出水平提供参考依据。  相似文献   

山东省会城市群经济圈科技投入与产出评价体系研究     

岳海鸥张彦奇  吕芳芳王红芬 《中国科技资源导刊 (中国信息导报)》2016,(5):19-26

通过构建科技创新体系评价指标,研究山东省会城市群经济圈科技投入与发展现状。运用熵值法确定指标 权重,对科技创新的核心因素进行深入分析,结合聚类分析法对经济圈内各地市的科技投入与产出情况进行比较评价 和分类研究,并给出提升经济圈科技投入与产出水平的对策建议。  相似文献   

Are you a budding academic writer?          下载免费PDF全文

Maria J. Grant  Penny Bonnett  Anthea Sutton  Audrey Marshall  Jeannette Murphy  Hannah Spring 《Health information and libraries journal》2016,33(1):1-6

Academic writing can seem a daunting prospect although with the right support and information it can be more achievable than you think. In this first set of editorial comments of 2016, editors from all sections of the Health Information and Libraries Journal outline the origins of the individual section of the journal which they oversee and highlight some of the things you might want to consider when thinking of submitting your writing for publication.  相似文献   

抽象绘画的艺术语言     

刘君博 《闽江学院学报》2003,24(4):106-108

抽象绘画是当今人类社会的审美向多元化拓宽的产物。抽象绘画应用点、线、面、体、色彩等元素。构成超越实际生活的抽象符号来表现画家自我感受，让人通过复杂的形象思维活动去体会作品中的理性美感。它是纯意识、纯形式的艺术。  相似文献   

从krashen的习得/学得假说谈外语语法教学     

鲁绵茸 《商洛学院学报》2003,17(1):60-61

从语言学家对krashen习得/学得假说的异议看到习得和学得并不是相互独立的,而是相互渗透、相互融合的,进而认为krashen在此理论基础上创立的自然教学法对外语语法教学的忽视是不妥的,并从语法教学的意义加以证明.  相似文献