Understanding consumers’ continuance intention towards mobile purchase: A theoretical framework and empirical study – A case of China

Although mobile purchase is convenient in the age of mobile commerce, many consumers still do not utilize mobile purchase to its full potential. From the mobile vendor’s perspective, retaining current customers and facilitating their continued purchase are crucial to create profitability and achieve a sustainable development. An understanding of the continuance intention towards mobile purchase can provide insights into mobile vendors’ marketing campaigns. Therefore, it is important to examine the determinants that impact continuance intentions of consumers for mobile purchase. Drawing upon information success model, flow theory and trust, this study proposed and empirically tested an integrated model to better understand the determinants of consumers’ continued intention to purchase on mobile sites. Empirical data from 462 users who had experience with mobile purchase were tested against the proposed research model by using structural equation modelling (SEM). The results indicated that information quality, and privacy and security concerns are the main factors affecting trust, whereas service quality is the main factor affecting flow. System quality, and privacy and security concerns affect satisfaction. Trust affects flow, which in turn affects satisfaction. These three factors together affect continued intention towards mobile purchase. The findings of this study provide several important implications for mobile commerce research and practice.     

基于动态有理函数的功放模型及预失真应用

针对现代无线通信系统中射频功率放大器的非线性与记忆效应,提出一种新的低复杂度的动态有理函数模型,该模型简化了有理函数模型,通过两个多项式的比进行建模,但分子是包络记忆多项式的形式,分母由无记忆多项式构成.通过模型仿真和预失真应用系统验证,结果表明:与记忆多项式模型相比,动态有理函数模型所需的系数要少30.6％,模型精度却与其相近,邻信道功率比(ACPR)改善约20 dB,而与有理函数模型相比,所需系数要少21.9％,模型精度改善2.4 dB,ACPR改善约15 dB.由此证明了该模型在复杂度和精确度上的优越性,对功放预失真的研究具有重要的参考价值.     

面向用户查询意图的句子相似度分层计算

为进一步提高句子相似度算法的准确性并提升其在复杂语境中的适用性,综合编辑距离、关键词及同义词语义方法,设计出面向用户查询意图的句子相似度分层算法.在充分分析实验数据用途的基础上,研究数据的特征分布,借助自然标注将句子相似度计算建模为多层次优化问题.经仿真实验证实该算法是有效的,F值可达到0.6019.     

Recurrent neural network technique for behavioral modeling of power amplifier with memory effects

A new technique for behavioral modeling of power amplifier (PA) with short‐ and long‐term memory effects is presented here using recurrent neural networks (RNNs). RNN can be trained directly with only the input–output data without having to know the internal details of the circuit. The trained models can reflect the behavior of nonlinear circuits. In our proposed technique, we extract slow‐changing signals from the inputs and outputs of the PA and use these signals as extra inputs of RNN model to effectively represent long‐term memory effects. The methodology using the proposed RNN for modeling short‐term and long‐term memory effects is discussed. Examples of behavioral modeling of PAs with short‐ and long‐term memory using both the existing dynamic neural networks and the proposed RNNs techniques are shown. © 2014 Wiley Periodicals, Inc. Int J RF and Microwave CAE 25:289–298, 2015.     

Information Counseling Inventory of Affective and Cognitive Reactions While Learning the Internet

Abstract

Library professionals in the information age are called upon to provide user-friendly information environments. To accomplish this, more detailed knowledge is needed about the information behavior of users. The concept “information counseling” reflects this new orientation and involves instruction activities such as: orienting, advising, and reassuring novice learners. The taxonomic approach transforms self-witnessing reports into classified segments of information behaviors at three levels of internalization and in three behavioral domains, including: affective, cognitive, and sensorimotor behavior. Reference librarians and instructors are invited to contribute to the taxonomy and make use of it in planning and designing programs and facilities. This behavioral inventory of information behaviors learning the Internet is presented with illustrative entries under each category for affective and cognitive behavior. Suggested uses for the inventory include promoting information self-counseling skills, helping learners overcome technophobia through generational self-witnessing reports, and creating better point-of-use instructions for novices using complex information systems.     

移动自组网协作策略研究与分析

针对移动自组网中自私节点拒绝转发数据包的服务请求,影响整体网络性能的问题进行研究,基于经济学中提出的博弈理论,描述了节点检测记录相邻节点的协作率而识别自私节点的方法,提出了主动能量制约策略AECS和基于统计信息的节点协作重复博弈策略LTFT,分析表明该策略和方法能够有效激励协作并孤立自私节点,能有效的解决网络性能与节点收益的权衡问题,在一定程度上解决节点的协作问题。     

Web检索查询意图分类技术综述

查询分类是近年来信息检索领域的研究热点,并且在很多领域得到了广泛地关注。主要讨论根据查询的意图进行分类的研究工作,从查询分类的诞生背景、关键技术、所使用的分类方法和评价方法方面进行综述评论,提出了查询意图分类面临的问题和挑战。认为缺乏权威的评测标准、在大规模数据集上的未经全面测试的性能、如何准确地获取查询的特征以及如何证明分类体系的完备性和独立性是目前查询意图分类研究的关键问题。     

光纤通道交换机F端口功能模型研究

要研究并设计出高性能的光纤通道（FC）交换机,首先要对其功能有准确的定位。本文从FC交换机中最基本、最简单的F端口入手,根据交换机对不同类型的数据所采取的处理方式,对FC-FS协议进行了功能上的划分,从中提取出F端口在协议处理过程中需要完成的功能,进行了全面分析,并建立了行为级模型。     

Introduction to the special section on contemporary issues in human sexuality: research and practice

Critical issues in human sexuality have changed markedly during the past decade and so have the contributions of psychology to the evaluation and treatment of sexual behavior problems. Some of the greatest challenges facing psychologists today include the increasing emphasis on medical interventions for the male sexual disorders and the relative decline of traditional behavioral sex therapies, the recalcitrance of sexual desire disorders, the prevention of "unsafe" sexual behavior, and the limited understanding of female sexuality. This overview introduces a series of 5 articles that examine these selected critical issues in human sexuality. Guidelines for clinical practice and directions for future research are highlighted.