Term frequency – function of document frequency: a new term weighting scheme for enterprise information retrieval

In today's business environment, enterprises are increasingly under pressure to process the vast amount of data produced everyday within enterprises. One method is to focus on the business intelligence (BI) applications and increasing the commercial added-value through such business analytics activities. Term weighting scheme, which has been used to convert the documents as vectors in the term space, is a vital task in enterprise Information Retrieval (IR), text categorisation, text analytics, etc. When determining term weight in a document, the traditional TF-IDF scheme sets weight value for the term considering only its occurrence frequency within the document and in the entire set of documents, which leads to some meaningful terms that cannot get the appropriate weight. In this article, we propose a new term weighting scheme called Term Frequency – Function of Document Frequency (TF-FDF) to address this issue. Instead of using monotonically decreasing function such as Inverse Document Frequency, FDF presents a convex function that dynamically adjusts weights according to the significance of the words in a document set. This function can be manually tuned based on the distribution of the most meaningful words which semantically represent the document set. Our experiments show that the TF-FDF can achieve higher value of Normalised Discounted Cumulative Gain in IR than that of TF-IDF and its variants, and improving the accuracy of relevance ranking of the IR results.     

Women’s Careers at the Start of the 21st Century: Patterns and Paradoxes

In this article we assess the extant literature on women’s careers appearing in selected career, management and psychology journals from 1990 to the present to determine what is currently known about the state of women’s careers at the dawn of the 21st century. Based on this review, we identify four patterns that cumulatively contribute to the current state of the literature on women’s careers: women’s careers are embedded in women’s larger-life contexts, families and careers are central to women’s lives, women’s career paths reflect a wide range and variety of patterns, and human and social capital are critical factors for women’s careers. We also identify paradoxes that highlight the disconnection between organizational practice and scholarly research associated with each of the identified patterns. Our overall conclusion is that male-defined constructions of work and career success continue to dominate organizational research and practice. We provide direction for a research agenda on women’s careers that addresses the development of integrative career theories relevant for women’s contemporary lives in hopes of providing fresh avenues for conceptualizing career success for women. Propositions are identified for more strongly connecting career scholarship to organizational practice in support of women’s continued career advancement.     

基于Excel的道路工程计算技术

围绕数据组织、数据的联动检索技术、Excel高级函数、Excel自定义函数、Excel VBA程序的开发过程,系统地建立了基于Excel的道路工程计算的框架模板。     

西方银行理论在近代中国的传播及影响

从19世纪中叶到20世纪中叶,西方银行理论在中国得到了日益深入广泛的传播,推动了中国金融思想的近代化,促进了银行制度在近代中国的建立与发展。近代国人在引进、研究西方银行理论,改造传统金融思想,建立银行制度的过程中,大多主张学习借鉴西方的银行制度,但他们反对照抄照搬,而是要求结合中国实际,有所创新,有所发展,以建立适合中国国情的银行制度。这种学习西方的态度和方法值得我们的今天借鉴。     

营销组合理论演变的内在逻辑

在近50年的发展中,营销组合理论经过传统的4Ps理论,发展到今天最新的4Rs理论.笔者认为,营销组合理论演变的主线是企业营销理念由注重短期交易关系转变为注重长期交易关系.     

英国NHS制度的理念嬗变及对我国新医改的启示

作为世界上第一个福利国家,英国在卫生保健方面,建立的是国民健康服务体系(NHS),即“贝弗里奇”模式的医疗保障制度.该模式以高度的公平性和福利性闻名于世,在为国民提供全方位的免费医疗服务上取得了显著成就,从而成为当今世界典型的医疗保障模式之一.研究英国国民健康服务体系制度理念的嬗变及其对实践的影响,能为我国新一轮的医药卫生体制改革提供启示.     

元搜索引擎研究

该文对元搜索引擎进行了界定,阐述元搜索引擎的特征、分类及其运作原理,研究了元搜索引擎几项关键技术,并讨论了它的未来发展方向。     

基于组织惰性视角的组织理论演进路径研究

组织演进的过程也即组织惰性的克服过程。从克服组织惰性的视角出发,文章认为古典管理理论所倡导的“一场全面的心理革命”、行为科学理论对人的关注、管理科学理论对组织管理的重新认识以及当代组织理论所推崇的开放系统与组织学习理念,都是在打破传统组织理论范式的基础上建立起来的。人们正是在不断克服组织惰性的过程中推动组织理论与实践的创新。     

Videotex for news and business data: Comparison of user response to two information retrieval applications

An empirical comparison of user response to two information services offered by a prototype videotex system indicated that the business (ie farm market data) service was rated as more efficient and that users browsed more in that service than in the consumer (ie news) service. Further, both efficiency ratings and amount of browsing were more strongly correlated with amount of service use, ratings of service value and ratings of dependence upon the service for the business service than for the consumer service. Browsing thus seems to be a utitarian surveillance behaviour rather than a communication play behaviour in this setting.