基于位置的社会化网络推荐技术研究进展

随着移动互联网技术、定位技术和无线传感技术的飞速发展以及智能手机的不断普及,基于位置的社会化网络及其带来的应用服务应运而生并得到了迅速的发展.位置数据弥合了物理世界和数字世界之间的鸿沟,使得人们能够更深入地了解用户的偏好和行为.针对用户的兴趣所在,为用户提供基于位置的个性化推荐服务,已成为当前基于位置的社会化网络的一项重要服务,得到工业界和学术界的广泛重视,正成为推荐系统和社会化网络研究领域的一个新的研究热点.从推荐对象、推荐方法和评价方法3个方面对基于位置的社会化网络推荐技术进行概括、比较与分析;在此基础上,对这一研究领域未来可能的研究方向进行了总结与展望.     

New members’ online socialization in online communities: The effects of content quality and feedback on new members’ content-sharing intentions

Online communities’ viability and success are dependent on current members’ active participation and content contribution, as well as on the sustainable community registration of new members. Based on the member-life cycle perspective, this study attempted to discover mechanisms that might be employed to increase new members’ community participation. This study focused on user-generated content (UGC) sharing. The results of this study suggest that UGC quality gaps that exist between current and new members are important factors that might affect new members’ socialization. In addition, the results demonstrated that feedback provided by members can affect new members’ participation when UGC quality gaps exist. The results revealed that new members preferred an equivalent UGC community to either a superior or inferior community when they were unable to derive benefits from those communities. However, an investigation of the types of feedback provided revealed that new members expressed preferences for superior UGC communities to obtain learning opportunities and expressed preferences for inferior UGC communities to develop social relationships. This study can help researchers better understand how UGC communities’ elements can affect new members’ behaviors. In addition, the results can help community managers devise differentiated approaches.     

Overview of rural building energy efficiency in China

Over the past three decades, people׳s living standard in China has been greatly improved, accompanied by the rapid increasing building energy consumption. Rural building energy consumption has become one of the most important parts of the total energy consumption in China, which deserves to be paid much attention. It is of vital importance to promote building energy efficiency for the New Socialist Countryside and energy conservation and emission reduction. This paper provides an overview of building energy consumption in the countryside, which figures out the situation and challenges in energy-saving work. The government has worked for years on rural building code system aimed at narrowing the energy gap between urban areas, but it is in the beginning phase. This paper has analyzed the only special issues about rural building energy efficiency and the mandatory standards for urban buildings, which can facilitate the development of rural building energy efficiency. Based on the above analysis, some recommendations regarding the improvement of rural building energy efficiency are given.     

图表示学习方法在消费金融领域团伙欺诈检测中的研究

消费金融的欺诈检测是学术界和产业界的一个重要问题,现阶段比较流行的做法是利用机器学习方法通过提取用户的固有特征来实现。随着团伙化欺诈的出现,传统的机器学习方法在欺诈用户样本数量小及特征数据不足的情况下,显得无能为力。团伙欺诈用户之间有很强的关联关系,该文利用用户间的通话数据构建用户关联网络,通过网络统计指标和DeepWalk算法提取用户节点的图特征,充分利用图的拓扑结构信息和邻居节点信息,将其与用户固有特征一起作为特征输入,使用LightGBM模型对上述多种特征进行学习。实验结果表明,采用图表示学习方法后,AUC指标与仅使用用户固有特征相比提高了7.3%。     

从网络文化看计算机教育

《信息技术》课程在我国的高中已经普及,《计算机文化基础》是大学各专业学生必修的公共基础课程,目前各学校计算机课程的教学基本都局限在计算机基本操作和常用软件的使用上,而计算机文化以及网络文化方面的内容较为欠缺。为了让计算机类课程的教学和考核在培养学生良好的计算机文化和网络文化素养方面起到应有的作用,必须对计算机课程的教学方式和考核方式加以改革。     

一种新型的招标模式——可研设计一体化招标

根据目前水利工程勘测设计招标工作中存在问题,拟提出可研设计一体化招标模式,并针对可研设计一体化招标模式解决勘测设计招标模式现实问题的有效程度进行了实证调研。最后,详细阐述了可研设计一体化招标模式的定义与内容以及其对于勘测设计招标模式的优势与不足。     

浅谈南水北调工程招标投标监管

分析南水北调工程特点和招标投标体制、程序,对南水北调工程招标投标监管经验进行了提炼总结,提出了建议,可为大型工程项目招标的监管工作提供借鉴和启发。     

我国软件服务外包人才存在的问题研究

近两年,在全球经济低迷、企业面临风险不断加大的严峻形势下,服务外包已经成为新一轮全球产业转移的大趋势。该文根据国际外包服务发展的新趋势．指出现阶段我国大多数国际服务外包人才亟待解决的问题。     

网络行为对网络安全的影响研究

网络安全已经从被动的安全防护转向主观的防御,对于网络行为的研究有助于我们分析现有的网络安全隐患,进而构建有效的安全体系。通过对网络的行为特征进行了研究,分析了相关安全问题,并分析讨论了安全体系的构建方式。