Research on e-commerce transaction networks using multi-agent modelling and open application programming interface

We provide a formal definition of an e-commerce transaction network. Agent-based modelling is used to simulate e-commerce transaction networks. For real-world analysis, we studied the open application programming interfaces (APIs) from eBay and Taobao e-commerce websites and captured real transaction data. Pajek is used to visualise the agent relationships in the transaction network. We derived one-mode networks from the transaction network and analysed them using degree and betweenness centrality. Integrating multi-agent modelling, open APIs and social network analysis, we propose a new way to study large-scale e-commerce systems.     

Renminbi Internationalization： Progress, Prospect and Comparison

Using principal component analyses, this paper constructs two internationalization indices for the renminbi (RMB) and 32 other major currencies. We find that the RMB's currency internationalization degree index (CIDI) is still low, and far behind the 4 most important international currencies. In 2009, it was ranked 18th among all important international currencies. However, in terms of the currency internationalization prospect index (CIPI), the RMB has remained the world's fifth highest since 2006. Although it is still far behind the US dollar and the euro, surpassing the ranking of the yen and the pound is possible in the near future. The dramatic difference in the ranking between the CIDI and the CIPI is a result of China's tight capital account control, the usage continuity of international currency due to network externalities, and the narrow foreign exchange and imperfect financial markets. Hence, to a large degree, the RMB's potential as an international currency depends on China's capital account liberalization.     

居民消费能力视角下的中国经常账户顺差影响因素协整分析

持续、巨额的经常账户顺差给中国带来了一系列负面影响。彻底扭转中国经常账户失衡,迫在眉睫。文章基于居民消费能力的视角,对中国经常账户问题进行了理论和实证分析。理论研究结果表明,居民消费能力是影响中国经常账户的主要因素;实证研究结果表明,中国经常账户顺差与居民消费能力、投资率、净国外资产比率和人口抚养比存在长期动态均衡关系,其中居民消费能力是影响经常账户的重要因素且与经常账户余额/GDP呈负相关关系。最后文章提出了相关的对策和建议。     

What's in a broken promissory obligation? Developing and testing a multiple component form measure of psychological contract breach

While the literature has suggested the possibility of breach being composed of multiple facets, no previous study has investigated this possibility empirically. This study examined the factor structure of typical component forms in order to develop a multiple component form measure of breach. Two studies were conducted. In study 1 (N = 420) multi-item measures based on causal indicators representing promissory obligations were developed for the five potential component forms (delay, magnitude, type/form, inequity and reciprocal imbalance). Exploratory factor analysis showed that the five components loaded onto one higher order factor, namely psychological contract breach suggesting that breach is composed of different aspects rather than types of breach. Confirmatory factor analysis provided further evidence for the proposed model. In addition, the model achieved high construct reliability and showed good construct, convergent, discriminant and predictive validity. Study 2 data (N = 189), used to validate study 1 results, compared the multiple-component measure with an established multiple item measure of breach (rather than a single item as in study 1) and also tested for discriminant validity with an established multiple item measure of violation. Findings replicated those in study 1. The findings have important implications for considering alternative, more comprehensive and elaborate ways of assessing breach.     

Cost-effectiveness of a continuous glucose monitoring system with trending and rate information to predict hypoglycaemia and hyperglycaemia in pregnant women with insulin-dependent diabetes mellitus

Summary

This study seeks to determine the cost-effectiveness of the FreeStyle Navigator? continuous glucose monitoring system compared with self-monitoring of blood glucose (SMBG) when predicting hypoglycaemia and hyperglycaemia in pregnant women with insulin-dependent diabetes mellitus. A Markov model was constructed, and initial model analysis demonstrates that use of the FreeStyle Navigator? by a patient who is trained in diabetes management is more cost-effective than SMBG, resulting in an incremental cost-effectiveness ratio of $267 per quality-adjusted life-month ($3,204 per quality-adjusted life-year). The real-time glucose level rate of change and trend information provided by the FreeStyle Navigator? allows appropriately trained patients to improve upon decisions regarding self-treatment to prevent hypoglycaemic and hyperglycaemic episodes, resulting in a lower treatment cost and higher effectiveness than untrained patients. Based on current performance attributes, a device such as the FreeStyle Navigator? would be more cost-effective than other glucose-monitoring devices, meeting the $50,000/QALY willingness-to-pay threshold used by payers for adoption of new technology.     

Computer Simulation as a Tool for Planning and Management of Visitor Use in Protected Natural Areas

The United Nations Environment Programme’s Principles on Implementation of Sustainable Tourism suggest that implementing sustainable tourism must include monitoring visitor use of protected natural areas and directing it to areas where the environmental and social impacts of tourism are minimised. Thus, sustainable tourism management requires information about the spatial and temporal flow of visitor use in protected natural areas to help identify potential tourism-related threats to the natural and cultural resources of an area and the quality of visitors’ experiences. Recent research has identified at least four ways in which simulation modelling of visitor use can facilitate more informed planning and management of sustainable tourism in protected natural areas, including (1) describing existing visitor use flows; (2) monitoring the condition of ‘hard to measure’ indicator variables; (3) testing the effectiveness of alternative visitor use management practices; and (4) guiding the design of research on public attitudes. The purpose of this paper is to demonstrate, using findings from studies conducted in the Inyo National Forest and Isle Royale National Park, USA, each of these four potential contributions of computer simulation to sustainable tourism management and planning. The paper concludes with an assessment of the limitations of existing applications of computer simulation to nature-based tourism and recommendations for future research.     

薄层色谱法检测林可霉素B组分的方法探索

目的通过实验寻找适合林可霉素中间供试品中B组分检测方法。方法采用硅胶板,以醋酸-正丁醇-水(2:1:1)为展开剂,用碘显色,观察不同的供试品浓度与展开时间。结果供试品浓度控制在800-900u/ml,展开60min,可检测林可霉素中间供试品中的B组分。结论该法快速简便,可用于生产中林可霉素中间供试品中B组分的检测。     

山东科技金融绩效评价——基于主成分分析的DEA研究路径

本文以主成分分析方法进行指标蕴含信息的整合,重新组合一组线性无关的综合性指标,运用数据包络分析方法(DEA)对山东省科技金融投入进行效益评价。研究结果表明,山东省2000—2010年的金融投入重数量、轻质量,重速度、轻基础,呈现出DEA无效状态。基于此,山东省科技金融发展应转变发展方向,走可持续、集约化的发展路径。     

几种辅料对罗红霉素胶囊质量的影响

文章通过选择合适的辅料并调整其在罗红霉素胶囊中比例的试验，发现淀粉、预胶化淀粉、羧甲基淀粉钠（CMS- NA）、滑石粉、微粉硅胶等辅料的选择与用量大小对罗红霉素胶囊产品质量有一定的影响。     

A support methodology for EAI and BPM projects in SMEs

This paper presents a support methodology that facilitates the analysis of shared information between applications. The contemporary needs of information systems within companies rely on the integration of different applications. As a consequence, integration projects called EAI (enterprise application integration) and BPM (business process management) have arisen. These projects need support methodologies to facilitate the process of information integration. The aforementioned methodology also helps companies to align management applications with their business processes and to define the integration of the company's information systems.