直列四缸四冲程八气门汽车发动机的气门间隙调整

介绍了发动机之所以要留气门间隙的原因及影响,确定了直列四缸四冲程八气门发动机间隙调整的顺序,与具体调整方法,并对其调整顺序做了一个简单、易记的总结。     

基于聚类算法的电子商务信息集成研究

随着我国电子商务发展的不断深入,这种新型的商业模式提高了对互联网情报信息搜索量和质的要求;元搜索引擎技术的不断进步使信息检索量有了很大的提高,但检索响应时间和检索准确度成为制约该技术在电子商务领域应用的瓶颈;本文通过基于传统的k-means聚类算法,优化了其类别选择机制获得了信息检索的高准确度和快速响应;实证结果表明,优化的k-means聚类算法具有较高的聚类质量和算法弹性,是元搜索引擎技术的有利补充。     

Relevance of Fundraising Charities’ Content-Marketing Objectives: Perceptions of Donors,Fundraisers, and Their Consultants

Many fundraising charities invest heavily in content marketing, often using consultants to direct their content-marketing efforts. Thus it is vital to establish whether certain key aims of content marketing suggested by literature in the field actually match the aspects of content marketing deemed most important by charity donors. This paper examines the significance attached by samples of charities, donors, and content-marketing consultancies to four possible major objectives of content marketing—the attainment of high–search-engine-results-page rankings, image enhancement through impression management, the stimulation of public perceptions of organizational transparency, and the creation of messages that “go viral.” Several major differences in perceptions emerged among the three groups, with substantial implications for how fundraising charities should manage their content-marketing programs and activities. Charity managements need to consider carefully and critically the possible returns on large-scale expenditures intended to pursue the putative aims of content marketing that are routinely advocated by practitioner and academic literature.     

电控发动机加速不良教学过程设计

本文以喷油器引起的电控发动机加速不良故障为例,采用任务驱动和六步教学的方式进行了教学设计,以引起学生的学习兴趣,增强学生的动手能力,进一步提高教学质量。     

An intelligent and secure system for predicting and preventing Zika virus outbreak using Fog computing

Zika virus is a mosquito-borne disease that spreads very quickly in different parts of the world. In this article, we proposed a system to prevent and control the spread of Zika virus disease using integration of Fog computing, cloud computing, mobile phones and the Internet of things (IoT)-based sensor devices. Fog computing is used as an intermediary layer between the cloud and end users to reduce the latency time and extra communication cost that is usually found high in cloud-based systems. A fuzzy k-nearest neighbour is used to diagnose the possibly infected users, and Google map web service is used to provide the geographic positioning system (GPS)-based risk assessment to prevent the outbreak. It is used to represent each Zika virus (ZikaV)-infected user, mosquito-dense sites and breeding sites on the Google map that help the government healthcare authorities to control such risk-prone areas effectively and efficiently. The proposed system is deployed on Amazon EC2 cloud to evaluate its performance and accuracy using data set for 2 million users. Our system provides high accuracy of 94.5% for initial diagnosis of different users according to their symptoms and appropriate GPS-based risk assessment.     

Tourism theory and the earth

Given that tourism is an “earthly business”, why is it that the Earth rarely explicitly appears in tourism studies and tourism theory? In an attempt to grapple with this paradox, this paper seeks to contribute to a conceptual re-cognition of the Earth in tourism theory by probing some theoretical obstacles and possibilities. The paper demonstrates how the Earth has been conceptually erased in tourism theory by a privileging of the mapping of tourism and tourists onto the reference plane of the social. As an alternative the paper seeks to provide a geo-philosophically informed conceptualisation of the Earth as a primary plane of reference of which tourism is a particular form of de/re-territorialisation.     

Expert systems and land development expertise

Summary

Expert systems are a product of the new technology. They provide the means for computerizing human expertise. This necessitates a more explicit understanding of the latter, provides an additional source of it and presents the possibility of enhancing the competence of that expertise. The paper argues that in the face of increased competition for investment funds the development industry needs to adopt a more sophisticated approach to project assessment. Two examples, with respect to planning law and retail investment appraisal, are developed to indicate the potential of the expert system approach. Ultimately expert systems challenge appeals to ‘feel’, ‘experience’ and judgement’ in human decision‐making; if successful, however, they promise improved profitability.     

轻量级工作流引擎LShark的研究与开发

文章基于关系数据库建模,构造一个轻量级的工作流引擎LShark。设计的主体是模型库与运行库,使数据库服务器和工作流引擎融为一体,既降低了开发工作流引擎的难度,又使其能和应用系统无缝连接,能够为在不同平台上开发工作流管理系统提供支持。     

基于网络的师生互动新平台研究

鉴于目前高校普遍存在的师生学习交流欠缺的问题，本文分析了几种常见网络交流平台的特点及不足，如QQ、BBS、Blog等。着重研究了基于Google协作平台的师生交流互动新平台，认为在平台上完全可以实现其高端Google CMS系统所具备的师生互动协作、资源管理、课程内容传输与管理以及用户管理等课程管理功能，从而具有较强的可行性和良好的应用前景。     

品牌资产引擎视角下的品牌价值模型及其应用研究

品牌资产引擎(Equity Engine)是一种基于消费者认知的评估模型。在该模型中亲和力、功能表现和价格构成了品牌价值的三大要素。亲和力是品牌受到的来自消费者的信任和尊敬。功能表现是品牌资产的另一个重要组成部分。品牌对消费者而言的终极价值是品牌资产和价格的共同作用。品牌资产引擎可以帮助商业企业定量地测量品牌资产,了解品牌的显性和隐性驱动因素和最大化品牌资产。