“互联网+”背景下数学教师素养结构的调查研究

为了有效推进全国教师教育网络联盟计划,以互联网带动教师教育的跨越式发展,对于面向教师的关注和了解必然不可缺少．只有把握目前教师素养的现状,明晰互联网时代下教师发展所必要的素养,才能构建符合时代要求的数学教师素养结构框架。     

基于Copula理论的网络社交行为轨迹与金融信用相关性研究

"互联网(+)"以及大数据技术为构建互通互联的信用评价体系提供了新的契机,可解决长期以来信用指标片面化、离散化、静止化的缺陷.考虑到互联网数据多种类、多层次、多结构的特点,传统的线性回归已不适用.针对淘宝店铺和对应的新浪微博社交账号的真实数据,通过建立适当的Copula模型,对网络社交行为与金融信用之间的相关性进行探索性实证分析,证实了其相关性的成立,同时检验了Copula模型的优越性,为互联网大数据纳入信用评估体系提供了方法与论证,对促进互联网社交行为数据的价值开发、互联网金融的发展以及我国诚信体系的建设有一定的参考价值.     

互联网嵌入对返乡创业者创业能力的影响——网络学习的中介作用

互联网是返乡创业者重要的学习渠道,通过网络学习有利于返乡创业者获取创业所需相关信息、知识、资源,进而提升创业能力.引入互联网嵌入概念,将互联网创业学习解析为交流学习、资源获取学习两个维度,通过对273位返乡创业者的问卷调查,应用结构方程法验证了理论假设.实证结果表明:互联网嵌入的联系度、匹配度对返乡创业者创业能力有正向影响,牺牲感对返乡创业者创业能力有负向影响,网络学习在互联网嵌入与返乡创业者创业能力间起到中介作用.     

基于复杂网络的能源互联网信息物理融合系统跨空间风险传递研究

能源互联网呈现物理信息深度融合的趋势,为电力系统管理研究定义了新的研究框架。作为一个先进的复杂系统,能源互联网信息物理系统(Energy Internet Cyber-Physical System,ECPS)在其发展过程中面临着一些新的挑战,其中一个就是耦合结构下的风险管理。本文结合复杂网络理论和风险传递理论,着重在拓扑层面分析了ECPS跨空间交互机理,并在此基础上定义了交互路径和交互系数;接着建立了ECPS跨空间风险传递模型,量化描述了风险的传递和演化过程,并进行了风险影响评估;最后,通过仿真实验分析了三种不同交互系数节点故障的风险传递过程和不同攻击模式下系统的崩溃过程。对仿真结果的讨论阐述了能源互联网风险跨空间传递的特点,为更深入地研究ECPS的风险管理提供了参考。     

基于SEM的互联网金融企业信用影响因素研究

随着互联网金融的快速发展,互联网金融企业已经进入了快速发展和扩张阶段.这些企业涉足互联网金融的各项业务,其企业信用的好坏将直接决定互联网金融参与者的利益.从企业的基本财务能力、公司基本能力、互联网金融能力三个方面基于SEM构建互联网金融企业信用影响因素模型,以57家互联网金融上市企业为研究对象加以实证分析,根据分析结果对互联网金融企业的发展及监管提出科学合理的建议.     

互联网环境下消费信贷行为研究

采用结构方程建模方法,实证分析了感知易用性、感知有用性、感知风险、信用卡效应及使用的态度与互联网环境下消费者使用信用卡支付的意愿之间的作用路径关系,从而建立了互联网环境下消费信贷行为影响因素的概念模型．研究表明,除感知风险与使用的意愿之间存在负相关关系外,其余四个因素与使用的意愿之间均存在正相关关系,其中使用的态度对使用的意愿的影响最大．     

在线课程使用情况与影响因素研究

互联网技术、信息技术全面融入教学活动,围绕在线教学开展的相关研究引起广泛关注.在简要回顾在线教育的发展历史,概述在线课程各个时期的特点和现状的基础上,基于调查问卷法,通过收集、分析问卷数据,勾画了在线课程的使用情况;基于因子分析法,探究了影响在线课程使用的因素;基于全文分析,为在线课程的下一步发展提出了建议.     

互联网金融与传统金融业双向风险溢出效应研究

基于2013-2019年互联网金融指数和申万行业指数的日收盘价数据，采用GARCH族模型结合CoVaR方法，从定量计量和动态特征分析两方面入手，考察了互联网金融行业与传统金融业之间的双向风险溢出效应.结果表明，互联网金融与各传统金融业之间均存在双向不对称的正向风险溢出且传统金融业对互联网金融的风险溢出强度显著高于互联网金融对传统金融业的风险溢出强度；从整体来看，互联网金融与银行业之间双向风险溢出效应最强，但从局部分析，互联网金融可能会对证券业造成“激增式”风险溢出，不可掉以轻心；此外，互联网金融与各传统金融业之间的风险溢出还具有周期性特征.     

基于MVR-E技术的虚拟社区交流引擎的设计与实现

通过对多媒体及多用户虚拟现实技术结构的分析和研究,就如何在FlashCommunication Application Server环境下开发虚拟社区交流引擎,通过组件方式在互联网上建立虚拟现实站点,并就如何实现虚拟环境下何实现虚拟现实的三维显示、场景更替、对象行走以及各对象之间如何实现消息传递,给出了相应的解决方案.     

基于动态网络的事件风险演变研究

为了从互联网媒体数据中识别风险事件,描述事件的演化结构和感知事件风险的演化规律,文章基于动态网络事件风险演变分析框架.文章构建时序动态网络表示事件的演化,使用Louvain算法识别事件,使用事件迁移概率构建事件之间的关系图.在识别事件演化结构的基础上,文章确定事件的主要演化路径,归纳出事件风险与事件生命周期之间的关系.研究结果表明,事件的演化存在着事件形成、事件合并和事件衰减等结构,事件演化结构够成了事件发展的主要路径,事件风险在事件生命周期的不同阶段存在差异.     

Internet与管理信息系统的变革

本文阐述了Ｉｎｔｅｒｎｅｔ／Ｉｎｔｒａｎｅｔ的有关概念和技术，分析了传统ＭＩＳ的不足与缺陷，并且结合ＭＩＳ的特点和Ｉｎｔｅｒｎｅｔ／Ｉｎｔｒａｎｅｔ的技术，提出了一种新型的ＭＩＳ结构。     

数学学术资源开放获取文献类型及获取途径研究

基于互联网,对开放获取数学学术资源类型与布局进行调查,提出开放获取数学学术资源的方法与途径,并对网络开放数学资源应用对策提出几条建议,目的是推动开放获取数学资源在数学研究领域的普遍使用与有效传播.     

第三方互联网支付对我国广义货币流通的影响

以第三方互联网支付为视角,通过建立向量误差修正模型,定量分析第三方互联网支付对我国广义货币流通的影响,包括对广义货币供应量、广义货币乘数和广义货币流通速度的影响.研究表明:(1)第三方互联网支付会拉动广义货币供应量的增长、放大货币乘数效应、对广义货币流通速度起抑制作用.(2)第三方互联网支付是广义货币供应量、广义货币乘数、广义货币流通速度的单向格兰杰原因.最后,基于理论分析和实证检验结果为监管机构更好的管理第三方互联网支付提出了相关对策建议.     

A real options approach for entering the Internet securities trading businesses with start‐up time

This paper uses a real options approach to establish a new evaluation model under uncertainty of both the volume of Internet securities transactions and the total transaction volume of a securities firm. The proposed approach can assist securities firms in evaluating the optimal thresholds for entering the Internet securities trading business and withdrawing from the conventional securities trading business. This paper assumes that the annual number of Internet securities transactions and the total annual number of securities transactions both follow a geometric Brownian motion. Besides, this model considers a start‐up time to complete the entry project's procedure. Accordingly, a decision model based on the real options approach is introduced, and the closed form solutions for the optimal threshold values of the entry or withdrawal models are determined. The conclusions provide some valuable references to help strategic managers of securities firms in making decisions on entering the Internet securities trading business or withdrawing from the conventional trading business. Copyright © 2003 John Wiley & Sons, Ltd.     

On Some Techniques for Streaming Data: A Case Study of Internet Packet Headers

We consider the implications of streaming data for data analysis and data mining. Streaming data are becoming widely available from a variety of sources. In our case we consider the implications arising from Internet traffic data. By implication, streaming data are unlikely to be time homogeneous so that standard statistical and data mining procedures do not necessarily apply. Because it is essentially impossible to store streaming data, we consider recursive algorithms, algorithms which are adaptive and discount the past and also algorithms that create finite pseudo-samples. We also suggest some evolutionary graphics procedures that are suitable for streaming data. We begin our discussion with a discussion of Internet traffic in order to give the reader some sense of the time and data scale and visual resolution needed for such problems.     

Propagation of computer virus both across the Internet and external computers: A complex-network approach

Based on the assumption that external computers (particularly, infected external computers) are connected to the Internet, and by considering the influence of the Internet topology on computer virus spreading, this paper establishes a novel computer virus propagation model with a complex-network approach. This model possesses a unique (viral) equilibrium which is globally attractive. Some numerical simulations are also given to illustrate this result. Further study shows that the computers with higher node degrees are more susceptible to infection than those with lower node degrees. In this regard, some appropriate protective measures are suggested.     

Recent studies of agent incentives in internet resource allocation and pricing

Market makers choose and design market rules to serve certain objectives, such as to maximize revenue from the sales in the case of a single seller and multiple buyers. Given such rules, market participants play against each other to maximize their utility function values on goods acquired, possibly by hiding or misrepresenting their information needed in the implementation of market rules. Today’s Internet economy has changed the information collection process and may make some of the assumptions of market rule implementation obsolete. Here we make a fresh review of works on this challenge on the Internet where new economic systems operate.     

食品供应链企业社会责任的演化博弈分析

食品行业的互联网化进程中食品安全事件的频发使得互联网背景下食品供应链企业的社会责任问题引起国内外社会各界的广泛关注。在此背景下本文建立了食品供应商与第三方电子商务平台关于企业社会责任的博弈模型,根据实际情况做了相应的参数设置和变量假设并进行了演化结果分析,得到了食品供应商与第三方电子商务平台在不同情形下的演化稳定均衡策略,同时给出了参数变化时对演化稳定均衡策略的影响。本文的研究成果对食品供应链的社会责任研究具有一定的借鉴和参考价值。     

OR and the management of electronic services

This review paper is meant to provide some insight to the relation between operations research and the management of electronic services. We use the term electronic services, within the broader e-business context, to refer to any service that is delivered to the customer via electronic means, mainly the Internet as a new channel to communicate with customers, but also through mobile and other digital communications. During the last years we have experienced an explosion in the development of electronic services, which is creating abundant opportunities for operations research (OR) applications, required to empower several types of technology-mediated interactions, exploit the large-scale digital data sources, and automate the recurring operational decisions. In this paper we summarise the various aspects in which operations research may support the management of electronic services, taking into account the different characteristics of alternative electronic media, such as the Internet, mobile communications, interactive television etc.