Adherence to 24-hour movement guidelines among Portuguese preschool children: the prestyle study

ABSTRACT

Purpose

The 24-Hour Movement Guidelines (24 hMG) provide specific recommendations, including physical activity (PA), screen-time and sleep-duration, which preschoolers should achieve for a healthy day (24 h). The aim of the current study was to analyse preschooler’s adherence with the 24-Hour Movement Guidelines.     

汇川H2U系列PLC之间RS-485通信的实现

主要研究了汇川公司H2U可编程控制器(PLC)的通信技术,实现了两个H2U系列PLC之间基于RS-485的通信,并详细介绍了PLC之间通信的硬件连接方式、通信串口参数配置、触摸屏画面的设计以及程序实现。所讨论的方法已在采用H2U PLC及辅助设备组建的"运动控制系统"课程的教学实验平台上进行了验证,可以拓展应用于多台H2U PLC之间以及其他设备与H2U PLC之间的RS-485通信实现,对工程应用具有一定的借鉴意义。     

对中小城市承办高水平赛事现状的研究

采用文献资料等研究方法，通过对中小城市承办高水平赛事现状的研究，发现目前中小城市承办高水平赛事存在市场规模狭小，冷热不均，体育竞赛市场体系不完善，赛前的宣传力度不足等问题，针对这些问题进行分析，提出了相应的对策。     

中小企业应对国外反倾销诉讼中的会计问题

中小企业面临严峻的国际反倾销形势，迫切需要从多层面、多角度、多方法、多途径去思考与探索如何应对国外反倾销诉讼。本就反倾销诉讼中的会计举证、反倾销诉讼中的成本确认、反倾销诉讼中其他方面的会计问题等反倾销会计问题进行探讨。     

大世界悖理与小世界现象——情报交流研究新进展

简述了大世界悖理与小世界现象的涵义及其实验研究和基本内容，指出了它们对情报学和网络交流的影响。     

Can constrained relevance feedback and display strategies help users retrieve items on mobile devices?

Searching online information resources using mobile devices is affected by small screens which can display only a fraction of ranked search results. In this paper we investigate whether the search effort can be reduced by means of a simple user feedback: for a screenful of search results the user is encouraged to indicate a single most relevant document. In our approach we exploit the fact that, for small display sizes and limited user actions, we can construct a user decision tree representing all possible outcomes of the user interaction with the system. Examining the trees we can compute an upper limit on relevance feedback performance. In this study we consider three standard feedback algorithms: Rocchio, Robertson/Sparck-Jones (RSJ) and a Bayesian algorithm. We evaluate them in conjunction with two strategies for presenting search results: a document ranking that attempts to maximize information gain from the user’s choices and the top-D ranked documents. Experimental results indicate that for RSJ feedback which involves an explicit feature selection policy, the greedy top-D display is more appropriate. For the other two algorithms, the exploratory display that maximizes information gain produces better results. We conducted a user study to compare the performance of the relevance feedback methods with real users and compare the results with the findings from the tree analysis. This comparison between the simulations and real user behaviour indicates that the Bayesian algorithm, coupled with the sampled display, is the most effective. Extended version of “Evaluating Relevance Feedback Algorithms for Searching on Small Displays, ” Vishwa Vinay, Ingemar J. Cox, Natasa Milic-Frayling, Ken Wood published in the proceedings of ECIR 2005, David E. Losada, Juan M. Fernández-Luna (Eds.), Springer 2005, ISBN 3-540-25295-9     

图书馆人员的计算机使用与职业健康问题探讨

针对图书馆人员在长时间使用计算机对健康危害的事实，参照香港《职业安全与健康(显示屏幕设备)规例》的一些做法，提出国内应重视图书馆人员的职业健康问题，并探讨合理的解决方式。     

Wearable skin-like optoelectronic systems with suppression of motion artifacts for cuff-less continuous blood pressure monitor

According to the statistics of the World Health Organization, an estimated 17.9 million people die from cardiovascular diseases each year, representing 31% of all global deaths. Continuous non-invasive arterial pressure (CNAP) is essential for the management of cardiovascular diseases. However, it is difficult to achieve long-term CNAP monitoring with the daily use of current devices due to irritation of the skin as well as the lack of motion artifacts suppression. Here, we report a high-performance skin-like optoelectronic system integrated with ultra-thin flexible circuits to monitor CNAP. We introduce a theoretical model via the virtual work principle for predicting the precise blood pressure and suppressing motion artifacts, and propose optical difference in the frequency domain for stable optical measurements in terms of skin-like devices. We compare the results with the blood pressure acquired by invasive (intra-arterial) blood pressure monitoring for >1500 min in total on 44 subjects in an intensive care unit. The maximum absolute errors of diastolic and systolic blood pressure were ±7/±10 mm Hg, respectively, in immobilized, and ±10/±14 mm Hg, respectively, in walking scenarios. These strategies provide advanced blood pressure monitoring techniques, which would directly address an unmet clinical need or daily use for a highly vulnerable population.     

修辞格在广告英语中的运用

广告英语是一种有别于普通英语语篇的独具一格的应用文体语篇,广告英语的艺术感染力和社会经济效益取决于其语言的独特性。广告英语的成功在很大程度上取决于其修辞的魅力。广告英语的修辞魅力主要通过广告英语语篇在语音、词汇和句法三个层面的辞格运用来表现。