测量不确定度估算中协方差的两类评定

论述了当测量不确定度评定中出现相同原因导致某些不确定度分量相关时,用Ａ类方法计算的实质,同时提出了采用Ｂ类方法的可能性,指明按系统效应导致的分量与随机效应导致的分量的大小比,用Ｂ类方法计算相关系数的具体步骤。给出了一般情况下的计算结果。     

Can channel pattern trading be profitably automated?

Financial markets, such as the global foreign exchange (FX) market, often exhibit trending behaviour. Within such trends, the market level oscillates with changes in market consensus. Continued oscillations of this type result in the formation of wave patterns within the underlying trend known as channels, which are used by technical analysts as trade entry signals. A sample space of such channels has been constructed from a set of US dollar/British pound Spot FX tick data from 1989–1997 using pattern recognition algorithms and the profitability of trading using such patterns has been estimated. A number of attributes of the resulting collection of channels has been subjected to statistical analysis with the aim of classifying patterns that can be traded profitably using a number of simple trading rules. Results of this analysis show that there exist statistically significant links between the channels' attributes and profitability.     

The Effects of Locus of Control on Word‐of‐mouth Communication

Word‐of‐mouth can be a powerful tool for and against marketing a brand. The effect of personality can have a significant effect on an individual's word‐of‐mouth behaviour. One of the most popular personality constructs is the locus of control. This research studied the influence of the locus of control on consumer word‐of‐mouth communications. The results showed that individuals who scored high on their internal locus of control were more likely to engage in word‐of‐mouth communication with their out‐groups. In addition, individuals who scored high on their external locus of control were more likely to engage in word‐of‐mouth communication with their in‐group. Out‐groups are defined as people with a weaker ties relationship, while in‐groups are defined as people with a stronger ties relationship (i.e. close friends and family). These findings would help marketers in directing their promotional programmes more effectively.     

Fan-centric social media: The Xiaomi phenomenon in China

In this highly competitive century, social media offers both opportunities and challenges. The concept of social media is top of mind for many entrepreneurs today. Fans are assuming an increasingly active role in co-creating marketing content with companies and their respective brands. Based on the Xiaomi success story in China, we provide a framework for building the power of the fan base and propose a new fan-centric social media business model. We examine the best practice case study of an emerging company's successful efforts to leverage social media in order to reach an important audience of young consumers. Thereafter, we conclude with several lessons related to the integration of social media into a new firm's operation strategy. We strongly recommend that businesses, and especially startups, make good use of powerful social media to develop a business model with fan demand as the core. This is what we call the ‘fan-centric’ social media business model.     

Talk up or criticize? Customer responses to WOM about competitors during social interactions

Popular metrics such as the Net Promoter Score (NPS) highlights many benefits of word of mouth (WOM) to firms. Is WOM all it is claimed to be? Building on social identity theory, this research develops a conceptual model of WOM exchange in social settings and tests the model with customer surveys of three service sectors. The findings show that the effects of (1) positive and negative WOM (P/NWOM) received about competitors and (2) perceived presence of critical incidents (PPCIs) on P/NWOM given about own service provider are far from intuitive. Responses to PWOM received counter the suggestions in the NPS literature. The findings also indicate that the best firms can hope for when receiving NWOM about competitors is that their customers remain silent. It is recommended that firms communicate a message that is consistent with the nuanced views expressed by friends in social circles, rather than a uniformly superior positioning.     

北京市办公业的空间格局演变及其模式研究

通过对北京城市写字楼2009年调研数据的空间统计,研究北京市办公业的空间格局演变及其模式.研究发现:北京市写字楼总体呈现集聚的空间分布模式,分布重心向北倾斜明显,主要分布方向为"西北-东南",空间离散程度逐渐加大,显有逐渐向近郊及远郊推进的趋势.同时,北京市写字楼的空间分布经历了分散-集中-再分散的过程,"西北-东南"向的空间格局标示着北京城市办公功能空间布局的主导方向;其演变模式先后经历了离散-极化-扩散-稳定四个发展阶段.未来一段时间内,在中心城区内部已形成的办公集聚区的空间承载量有限的情况下,办公活动将向外扩展,办公活动郊区化将对缓解中心城区高度集聚、平衡城区与郊区发展不平衡的矛盾和优化城市功能空间分布起到积极作用.     

Word字处理课程中项目教学法研究初探

项目教学法是师生通过共同实施一个完整的项目工作而进行的教学活动,它是行为引导型教学方法的一种。文章结合笔者在Word字处理课程中的教学实践,探讨如何在Word字处理课程中进一步实施项目教学法,进一步提高学生的专业技能,培养学生的综合能力,使学生能够更好适应社会发展的需求。     

ETC中基于RFID的双标签汽车牌照自动识别系统研究

目的:设计适用于ETC中的汽车牌照自动识别系统。方法:分析原有ETC系统的工作原理和弊端与不足,提出了基于RFID双标签的汽车牌照识别系统。结果:从理论分析可以得出本文提出的方法可以有效的克服原有ETC系统中的问题———如牌照识别率太低和跟车干扰情况严重等。结论:本文提出的RFID双标签汽车牌照自动识别系统能有效克服原有ETC系统中的弊端和不足,有一定的实践应用价值。