基于梁模型的管路振动主动控制器设计

以计划行为理论为基础,利用调研获取的农户数据,分析了农户当前对于低碳属性农业技术的采用现状,并采用多层Logistic回归模型估计了农业项目和农户两个层面因素对农户低碳农业技术后续采用意愿所产生的影响。结果表明：农户对于低碳农业技术采用后的效果评价较好,技术需求度和后续采用意愿均处于较高的水平上,并且不同类型农户对当前低碳农业技术的采用程度、偏好程度存在一定差异;农业生产项目和农户经营主体两个层面的因素均对农户低碳农业技术后续采用意愿产生重要影响,且对于不同类型农户后续采用意愿的作用效果存在一定差异,其中农业项目的地理特征、经济效益、资金技术要素投入强度和农户的行为意向产生的影响作用较强;农户技术采用强度受到农户个体特征和行为意向的显著影响,且作用效果在不同类型农户之间存在明显差异。     

Crossing borders with social media: Online social networks and FDI

Social media is embedded in today's internationalization strategy. Companies extend their reach into foreign countries by posting and tweeting. Firms also enhance their mobile capabilities in foreign markets (e.g., knowledge and reputation) through user-generated content in online social networks. Levering on the capabilities-based theory of the multinational enterprise, this paper builds upon a resource-based, industry/network-based, and institution-based view framework. The study provides a comprehensive conceptual and empirical model to explain the effect of social networks on foreign direct investment. Empirical analysis in a global panel dataset of >4500 multinational enterprises suggests that online social networks' activity stimulates foreign capital expenditure and new affiliates. In addition, the article explores the relevance of customer capabilities along with sectoral and institutional moderating effects.     

互联网环境下学术期刊防范学术不端行为技术研究

利用互联网环境，从技术的角度出发，对一稿多投、抄袭行为、剽窃行为以及捏造行为等学术不端行为的检测与防范进行研究，提出了各种操作上可行的方法。实践证明，运用这些方法，可有效地防范有学术不端行为的文章在学术期刊上发表。     

Whither practice-near research in the modernization programme? Policy blunders in children's services

In this article, we lament the effects of practice-distant research and associated policy initiatives on contemporary children's services in England. In the last decade, as a result of high profile inquiries into non-accidental child deaths, statutory children's social care services in the UK have been subject to a wide-reaching ‘modernization’ programme. We studied decision-making in the high blame environment of local authority children's services. Our research sought to examine the relationship between performance management and the impact of anticipated blame within the decision-making practices of those providing, supervising and managing these services. We show that systems and technologies can be developed which both assist the users in their daily work and achieve desired organizational goals, but without an ethnographically informed, practice-near approach, unsafe work regimes and practices can ensue.     

Can Carbon Nanomaterials Improve CZTS Photovoltaic Devices? Evaluation of Performance and Impacts Using Integrated Life‐Cycle Assessment and Decision Analysis

In emergent photovoltaics, nanoscale materials hold promise for optimizing device characteristics; however, the related impacts remain uncertain, resulting in challenges to decisions on strategic investment in technology innovation. We integrate multi‐criteria decision analysis (MCDA) and life‐cycle assessment (LCA) results (LCA‐MCDA) as a method of incorporating values of a hypothetical federal acquisition manager into the assessment of risks and benefits of emerging photovoltaic materials. Specifically, we compare adoption of copper zinc tin sulfide (CZTS) devices with molybdenum back contacts to alternative devices employing graphite or graphene instead of molybdenum. LCA impact results are interpreted alongside benefits of substitution including cost reductions and performance improvements through application of multi‐attribute utility theory. To assess the role of uncertainty we apply Monte Carlo simulation and sensitivity analysis. We find that graphene or graphite back contacts outperform molybdenum under most scenarios and assumptions. The use of decision analysis clarifies potential advantages of adopting graphite as a back contact while emphasizing the importance of mitigating conventional impacts of graphene production processes if graphene is used in emerging CZTS devices. Our research further demonstrates that a combination of LCA and MCDA increases the usability of LCA in assessing product sustainability. In particular, this approach identifies the most influential assumptions and data gaps in the analysis and the areas in which either engineering controls or further data collection may be necessary.     

基于层次分析法的多媒体教学评价研究综述

从基于层次分析法的多媒体教学评价角度,对教学条件、教学课件、课堂教学效果及实验教学等领域的多媒体教学评价进行了综述研究,就目前这些研究方向存在的问题及其发展趋势进行了点评概括.     

Computer-Assisted Screening and Intervention for Alcohol Problems in Primary Care

ABSTRACT

The effectiveness of a bilingual (English/Spanish) computer-assisted alcohol screening/intervention for hazardous and harmful alcohol use, the Health Habits Survey (HHS) was tested in primary care settings. Assessment-only patients were compared with patients exposed to the HHS. Of the 2053 recruited, 151 (7.4%) screened positive on the Alcohol Use Disorders Identification Test (AUDIT) and were re-contacted six months later for follow-up. Significant alcohol reduction was observed in both conditions. No between-group differences were observed. Computer-assisted screening and intervention are feasible in primary care settings and may be a realistic provider-extender when traditional screening is absent or inconsistently implemented.     

多媒体网络环境下的英语自主合作学习探究

英语自主合作学习有利于学生主体地位的发挥，有利于促进英语的学习效果。多媒体网络技术的发展为英语自主合作学习提供了强有力的支撑和优越的发展条件。在多媒体网络环境下，通过对英语白主合作学习的实施与应用，简单地探究和讨论其中的问题，提出解决办法。     

气候变化背景下的知识产权国际保护之争

在气候变化与知识产权的问题上,厄瓜多尔等发展中国家在2013年6月至2014年10月的TRIPS理事会议中阐述了修订TRIPS协议的意见以求能够最大限度地获取无害环境技术及其产品,但美国等发达国家坚决拒绝修正TRIPS协议,认为非知识产权因素是妨碍发展中国家应对气候变化的主要原因。双方产生分歧的原因不仅在于对各自国家利益的诉求,也在于TRIPS协议和无害环境技术自身因素。考虑到人权保护的需要和当前处于知识积累阶段的现状,应当以技术转让重于技术创新的方式适应和减缓气候变化,修订TRIPS协议以帮助发展中国家获取无害环境技术及其产品。     

钢桶螺纹盖机器人旋紧控制系统

为了解决人工操作或机械半自动化旋紧钢桶螺纹盖所带来的弊端,提出采用工业机械臂对其进行自动旋紧。运 用EtherCAT总线技术,通过CoDeSys开发软件,设计开发了一种机器人旋紧控制系统,使得机器人可以对钢桶螺纹盖进 行自动抓取、定位和旋紧,完成相应的工序。该设计实现了钢桶螺纹盖旋紧的自动化生产,提高了生产效率和加工质量。