基于Bass模型的移动电话用户数扩散研究     

艾珺 《西安欧亚学院学报》2010,(2):17-19

扩散理论是传播理论的一个分支,产品扩散模型就是应用扩散理论来描述和预测社会系统中的创新扩散而建立的一系列数学分析模型。以Bass模型为理论基础,以历年移动电话用户数为数据基础,对移动电话用户数的扩散过程进行了参数估计,同时建立了移动电话用户数的扩散模型,并对移动电话用户数的扩散过程进行了预测和展望,从而为我国第三代移动通信标准3G的顺利扩散提供理论和实证支持。  相似文献   

手机邮箱服务采纳行为模式研究     

陈艳 《图书情报工作》2010,54(20):135-138

基于对相关信息技术采纳研究的回顾和总结,结合移动邮箱服务的特点,将技术接受模型与消费者行为过程结合起来,提出手机邮箱服务采纳行为研究的理论模型和假设并进行实证检验。  相似文献   

智能手机时代高校移动图书馆建设的探讨——基于3G手机图书馆     

王向前 《贵阳金筑大学学报》2012,(4):38-41

为实现智能手机读者方便快捷、免费下载使用图书馆数据资源,作者通过对3G移动图书馆的发展、服务项目及存在问题进行分析,提出在智能手机时代图书馆应加强网络、数据资源、主网页三个方面的建设。实现真正意义上的“手机移动图书馆”。  相似文献   

用J2ME技术开发移动信息设备应用程序的研究   总被引：1，自引：0，他引：1  

殷旭东  潘启勇 《常熟理工学院学报》2004,18(2):71-76

介绍用J2ME技术开发运行于移动信息设备的应用程序的基本方法.  相似文献   

COFDM原理及其设备的应用     

方水平 《北京工业职业技术学院学报》2004,3(4):53-56

本文主要介绍了无线传输存在的技术问题,正交频分复用(OFDM)的原理编码正交频分复用(COFDM)的基本原理、COFDM系统的优点、以及其设备在无线传输中应用.  相似文献   

尿酸氧化酶的研究及其应用   总被引：1，自引：0，他引：1  

开雷  岳珂  马晓航 《科技通报》2008,24(2):183-187

随着对血液中尿酸含量影响的研究发现,控制尿酸含量对于治疗一些疾病有着重要的作用,而尿酸氧化酶作为有效的控制尿酸含量的治疗试剂越来越受到关注。本文综述了尿酸氧化酶的来源、结构、酶学性质以及当前尿酸氧化酶在临床上应用的研究,并对尿酸氧化酶研究和应用中存在的问题和今后研究的发展做了展望。  相似文献   

社区流动图书馆研究   总被引：1，自引：0，他引：1  

王倩  吴正荆  毛秀梅 《情报科学》2008,26(3):364-368

流动图书馆是国外比较盛行一种服务模式,本文通过对其进行分析和研究,认为流动图书馆完全可以应用于中国的社区图书馆建设,并且应对于中国的具体实际情况,设计了三种社区流动图书馆的建设方案。通过流动图书馆来改变目前社区图书馆的现状,实现公共图书馆的网络化布局,加速中国的社区化进程,为建设和谐社会服务。  相似文献   

Unfolding the popularity of video conferencing apps – A privacy calculus perspective     

《International Journal of Information Management》2023

Video conferencing (VC) applications (apps) have surged in popularity as an alternative to face-to-face communications. Although VC apps offer myriad benefits, it has caught much media attention owing to concerns of privacy infringements. This study examines the key determinants of professionals’ attitude and intentions to use VC apps in the backdrop of this conflicting duality. A conceptual research model is proposed based on theoretical foundations of privacy calculus and extended with conceptualizations of mobile users’ information privacy concerns (MUIPC), trust, technicality, ubiquity, as well as theoretical underpinnings of social presence theory. Structural equation modeling is used to empirically test the model using data collected from 484 professionals. The study offers insights regarding the trade-offs that professionals are willing to make in the face of information privacy concerns associated with VC apps. Based on the findings, the study emphasizes the promotion of privacy protection at the organizational level, control mechanisms that motivate employees to actively engage in privacy protection behavior, and a multi-faceted approach for data transparency within the VC app platforms.  相似文献   

Accuracy of three Android-based pedometer applications in laboratory and free-living settings     

Jia Yan Leong 《Journal of sports sciences》2017,35(1):14-21

This study examines the accuracy of three popular, free Android-based pedometer applications (apps), namely, Runtastic (RT), Pacer Works (PW), and Tayutau (TY) in laboratory and free-living settings. Forty-eight adults (22.5 ± 1.4 years) completed 3-min bouts of treadmill walking at five incremental speeds while carrying a test smartphone installed with the three apps. Experiment was repeated thrice, with the smartphone placed either in the pants pockets, at waist level, or secured to the left arm by an armband. The actual step count was manually counted by a tally counter. In the free-living setting, each of the 44 participants (21.9 ± 1.6 years) carried a smartphone with installed apps and a reference pedometer (Yamax Digi-Walker CW700) for 7 consecutive days. Results showed that TY produced the lowest mean absolute percent error (APE 6.7%) and was the only app with acceptable accuracy in counting steps in a laboratory setting. RT consistently underestimated steps with APE of 16.8% in the laboratory. PW significantly underestimated steps when the smartphone was secured to the arm, but overestimated under other conditions (APE 19.7%). TY was the most accurate app in counting steps in a laboratory setting with the lowest APE of 6.7%. In the free-living setting, the APE relative to the reference pedometer was 16.6%, 18.0%, and 16.8% for RT, PW, and TY, respectively. None of the three apps counted steps accurately in the free-living setting.  相似文献   

国外数据库出版商移动服务方案分析及启示   总被引：2，自引：0，他引：2  

张苏闽  鄢小燕  谢黎 《图书情报工作》2012,56(11):65-70

调研国外20家数据库出版商的移动服务方案,从其服务形式、获取方式、权限及支持平台、开发模式、推广方式、用户评价几个方面进行分析,发现：目前国外数据库出版商在移动APP应用的开发上表现出较好的势头;在APP内容上,电子书、期刊类应用占绝大多数,且用户对移动APP的接受程度较高,但专业类应用仍有待开发;在平台开发上自主意识较强,但服务推广方式总体效果一般。在此基础上,提出图书馆应当加强移动APP的开发,在开发模式上增强自主意识,并加强与技术提供商及数据库商的合作,同时加大对移动服务的推广。  相似文献