In search of query patterns: A case study of a university OPAC     

Eng Pwey LauAuthor Vitae  Dion Hoe-Lian Goh 《Information processing & management》2006

A transaction log analysis of the Nanyang Technological University (NTU) OPAC was conducted to identify query and search failure patterns with the goal of identifying areas of improvement for the system. One semester’s worth of OPAC transaction logs were obtained and from these, 641,991 queries were extracted and used for this work. Issues investigated included query length, frequency and type of search options and Boolean operators used as well as their relationships with search failure. Among other findings, results indicate that a majority of the queries were simple, with short query lengths and a low usage of Boolean operators. Failure analysis revealed that on average, users had an almost equal chance of obtaining no records or at least one record to a submitted query. We propose enhancements and suggest future areas of work to improve the users’ search experience with the NTU OPAC.  相似文献   

跨文化交际中的语用失误     

杨春辉  王飞 《读与写:教育教学刊》2007,4(4):19-20

随着跨文化交际的日益增多,跨文化交际中的语用失误越来越明显地显露出来,阻碍着交际地顺利进行,甚至导致文化冲突和交际失败。人们逐渐关注语用失误现象,语用失误是跨文化交际失败的主要原因。  相似文献   

Application of the Bayes＇ theory to the failure rate evaluation of electrical apparatus   总被引：2，自引：0，他引：2  

JIN Shao-hua LU Jian-guo WAN Yan-ping SUN Shu-guang 《浙江大学学报(A卷英文版)》2007,8(3):501-505

The Weibull distribution has been widely used in reliability fields. A mixed Weibull distribution represents a population that consists of several Weibull subpopulations. In this paper, a new approach which combines the least-squares method with Bayes＇ theorem, takes advantage of the parameter estimation for single Weibull distribution is developed to estimate the parameters of each subpopulation. The estimates given by this paper also satisfy the maximum likelihood equation. The estimates of the failure rate of the mixed Weibull population are given. An actual test data is computed by using the proposed method. The Kolmogorov-Smirnov goodness-of-fit test turns out that the proposed method yields more accurate result.  相似文献   

Evaluating research and researchers by the journal impact factor: Is it better than coin flipping?     

Ricardo Brito  Alonso Rodríguez-Navarro 《Journal of Informetrics》2019,13(1):314-324

The journal impact factor (JIF) is the average of the number of citations of the papers published in a journal, calculated according to a specific formula; it is extensively used for the evaluation of research and researchers. The method assumes that all papers in a journal have the same scientific merit, which is measured by the JIF of the publishing journal. This implies that the number of citations measures scientific merits but the JIF does not evaluate each individual paper by its own number of citations. Therefore, in the comparative evaluation of two papers, the use of the JIF implies a risk of failure, which occurs when a paper in the journal with the lower JIF is compared to another with fewer citations in the journal with the higher JIF. To quantify this risk of failure, this study calculates the failure probabilities, taking advantage of the lognormal distribution of citations. In two journals whose JIFs are ten-fold different, the failure probability is low. However, in most cases when two papers are compared, the JIFs of the journals are not so different. Then, the failure probability can be close to 0.5, which is equivalent to evaluating by coin flipping.  相似文献   

试论中国特许经营双赢的发展策略   总被引：3，自引：0，他引：3  

陈雪琼  董园林 《襄樊学院学报》2001,22(1):21-26

特许经营以其独特的经营机制成为国际化潮流，在我国也呈现出火爆的局面。但众多的企业仅看到特许经营的优越性，而忽略了其中潜在的风险和投资陷阱。章着重分析企业和何规避特许经营发展中的失败风险及提出在中国发展特许经营理性、双赢的策略。  相似文献   

Reliability modelling and analysis of a two unit continuous casting plant     

A.G. Mathew  S.M. Rizwan 《Journal of The Franklin Institute》2011,348(7):1488-1505

The aim of this paper is to present a reliability modeling and analysis of a two-unit system of a continuous casting (CC) plant. Real maintenance data of a steel production plant have been used for the purpose. Three types of failures were noted: repairable, replaceable and reconditioning/reinstallation. The two-unit system is operating in parallel, on full-reduced installed capacity. Upon the unit failure, an inspection is carried out to decide the type of maintenance task to be performed. Optimized reliability indices of the plant such as mean time to system failure, availability, expected busy periods of the repairman for various maintenance tasks, expected number of visits by the repairman, expected number of repairs, replacements and reconditioning/reinstallation are obtained. Semi-Markov processes and regenerative point techniques are used for the analysis. Profit incurred to the CC plant is also evaluated and related graphs are plotted to demonstrate the results.  相似文献   

简析工业有机热载体炉常见故障与防范措施     

薛寒 《中国科技信息》2011,(11):140-141

有机热载体锅炉是以煤、油或可燃气体为燃料,导热油为热能的载体,具有低压高温的工作特性,已被广泛应用于化工、纺织、印染、轻工、食品、造纸、建材等行业。但在实际使用中也发生一些危及安全的事故,给人民生命和财产造成了一定的损失。  相似文献   

Developing the evidence base for UK film strategy: the research process at the UK Film Council     

David Steele 《Cultural Trends》2004,13(4):5-21

The UK Film Council established a Research and Statistics Unit in order to gather data relating to film to inform the development of UK Film Council strategy and to provide an information service to the industry, government, the arts and cultural sector and the wider research community. The Research and Statistics Unit draws data from both official and unofficial sources and commissions its own special-purpose studies to gather information relevant to the strategic objectives of the Council. Key tasks are the measurement of the size of the market for film and the various elements of the film value chain, the performance of films supported by the UK Film Council and the performance of UK films in general. Special-purpose research projects currently include a detailed survey of the film production workforce, a study of the economic impact of the UK screen industries and studies of the social impact of local cinemas and the experience of Black- and Minority-led film production companies. A range of industry and official partners are collaborating in these studies. The Research and Statistics Unit also provides statistical and policy analysis relating to the wider policy environment of UK film, including issues such as the future of film tax incentives. This analysis has been developed within the HM Treasury ‘Green Book’ framework with particular reference to understanding market failure in relation to film. Central to the market failure argument is the cultural value of film in both its qualitative and its quantitative aspects. UK Film Council research is placed in the context of the literature on hedonic pricing and contingent valuation. The industrial challenges of increasing cultural value are discussed. Finally, consideration is given to the potential of film to contribute directly to ‘public value’.  相似文献   

捐纳制度与清末新政     

叶小青 《宜宾学院学报》2006,6(8):31-33

捐纳制度是清政府一大弊政,存在有二百余年。延至清末,它完全成为清政府难以根治的恶疾。在清政府进行的王朝自我挽救的新政改革中,朝野上下对革除捐纳抱有热切的希望,但清政府不仅没有革除它的自觉和能力,反而变本加厉,大行捐纳,致使吏治腐败益加败坏,最终新政失败,清朝灭亡。  相似文献   

缔约过失责任商榷     

朱金荣 《温州职业技术学院学报》2003,3(4):75-76

缔约过失责任是为解决在订立合同过程中由于一方当事人过失而给对方造成损失是如何解决之而提出的理论。长期以来，不少经济法教材都把《中华人民共和国合同法》第四十二条的规定当成缔约过失，其实这种观点值得商榷。  相似文献