基于动态特征库的电子邮件分类的研究

随着邮件分类技术的不断发展,为了对邮件进行更加有效的组织和管理,需要对不断变化的邮件进行动态特征提取,根据其动态特征对邮件进行分类。从邮件的动态特征方面入手,通过编写邮件客户端程序,利用中科院的ICTCLAS分词工具实现中文邮件的准确分词,利用改进的TF-IDF算法对邮件的特征权重进行计算,并利用WEKA挖掘工具进行结果的仿真实验。实验结果表明,利用邮件的动态特征来对邮件进行分类是切实可行的,且在一定程度上能够对邮件进行合理有效的分类。     

基于Qmail 的邮件安全策略

首先通过危害性邮件对本单位所造成的影响,分析使用的中Qmail 邮件系统存在的安全问题,并对可设置的安全策略进行研究,通过对邮件系统安全策略的实际改进,提高本单位邮件系统对危害性邮件的抵御能力,以保证使用者的邮件安全。文中主要对当前较为普遍的邮件安全策略进行分析研究,针对我单位的实际情况,通过设置合适的邮件安全策略,提高本单位的邮件安全性。     

使用IMAP协议收发邮件

IMAP,英文全称Intemet Message Access Protocol（互联网邮件访问协议）,和PoP协议一样,它也是一种邮件获取协议,我们可通过这种协议从邮件服务器上获取邮件的信息、下载邮件等。但与PoP不同的是,IMAP是“双向”的,换句话说,你在电子邮件客户端或移动设备进行的操作,都可自动同步到服务器上,并可通过客户端直接对服务器上的邮件进行操作。同时,IMAP可以只下载邮件的主题,只有当你真正需要时,才会下载邮件的所有内容。     

一款盲用邮件接收器的设计与实现

盲用邮件接收器是帮助视力障碍者阅读邮件而设计的。盲人借助语音导航,通过上下左右键就能阅读邮箱中的邮件内容。该文主要介绍了运用pop3协议对邮件进行接收,形成相应邮件树型列表,并调用文本朗读(tts)进行语音导航和邮件阅读的实现步骤。     

JavaMail API电子邮件的收发

本文介绍如何利用JavaMail API创建邮件服务器的客户程序。实现连接到邮件服务器,接收和发送邮件,还能管理邮件和邮件夹。本文首先介绍了JavaMail API的常用类,然后详细讲解了通过JavaMail API创建邮件客户程序的基本步骤和技巧,包括进行身份认证、创建和解析带附件的邮件,以及操纵邮件夹等。     

基于邮件分类的敏感社团挖掘技术研究与实现

针对海量邮件数据的处理需求和实际业务需要,设计了基于三层过滤模型的邮件挖掘系统.对时间属性、内容信息和地址数据进行逐层分析和筛选过滤,在广度上缩小侦察范围,在深度上加大挖掘力度.系统以邮件正文和主题包含的敏感信息为切入对邮件进行自动分类,进而通过地址信息建立邮件社会关系网络,挖掘原始邮件数据背后隐含的社团结构.最后通过实验验证了其有效性.     

基于邮件分类的敏感社团挖掘技术

针对海量邮件数据的处理需求和实际业务需要,设计了基于三层过滤模型的邮件挖掘系统。对时间属性、内容信息和地址数据进行逐层分析和筛选过滤,在广度上缩小侦察范围,在深度上加大挖掘力度。系统以邮件正文和主题包含的敏感信息为切入对邮件进行自动分类,进而通过地址信息建立邮件社会关系网络,挖掘原始邮件数据背后隐含的社团结构。最后通过实验验证了其有效性。     

基于粗糙集的加权朴素贝叶斯邮件过滤方法

邮件过滤中有两个关键问题,一是如何选择有效的邮件特征集,二是设计较好的邮件过滤算法。在对邮件特性进行分析的基础上,综合邮件头及邮件内容的主要形象特征给出了一种新的邮件特征集提取方法。用粗糙集的信息观点度量了各属性的重要性,并以此为权重进行加权朴素贝叶斯垃圾邮件过滤,有效地解决了朴素贝叶斯分类中的条件依赖性问题。通过在中英文邮件集上的测试实验,证明了所提出的邮件过滤方法的有效性。     

已发送邮件 自动保存没商量

工作中我需要把发送的邮件进行备份,在公司我用Outlook,不管附件都大,都会自动保存到已发送邮件中;如果是出差在外,我则用上网本通过Web方式发送邮件,但超过1MB的邮件,总要单击“邮件发送成功”提示后的“保存该邮件”,否则就不会自动保存到已发送邮件中。     

邮件为什么会显示代发地址

邮件显示代发一般有以下三种情况。个人设置的代发:个人用户在A邮箱中设置代发地址B,并在发送邮件时使用B地址进行发送。那么在收信人的邮件中则会同时显示发件人地址(B)和代发件人地址(A)。企业或团体用户:广告邮件、订阅邮件等,使用了其他邮件服务器通过某个邮箱进行代发邮件。也会显示     

Security of the SMS4 Block Cipher Against Differential Cryptanalysis

SMS4 is a 128-bit block cipher used in the WAPI standard for wireless networks in China.In this paper,we analyze the security of the SMS4 block cipher against differential cryptanalysis.Firstly,we prove three theorems and one corollary that reflect relationships of 5- and 6-round SMS4.Next,by these relationships,we clarify the minimum number of active S-boxes in 6-,7- and 12-round SMS4 respectively.Finally,based on the above results,we present a family of about 2¹⁴ differential characteristics for 19-round SMS4,which leads to an attack on 23-round SMS4 with 2¹¹⁸ chosen plaintexts and 2^126.7 encryptions.     

Perceptions of overuse,underuse, and change of use of a social media site: definition,measurement instrument,and their managerial impacts

Drawing on the person-environment fit model, this study investigates a user’s perceptions towards his/her online contacts’ overuse, underuse, and change of use of a social media site (SMS). A new instrument for measuring these perceptions is introduced. Using depersonalisation and continuance as an example, we test how the relationship between a user and an SMS can be impacted by his/her online contacts’ peculiar usage of the SMS. A survey-based methodology is used to collect data from Facebook users. The data analysis shows that a user is likely to feel estranged from an SMS, if he/she perceives that the website is being overused, underused, or used for non-social purposes by his/her online contacts. The depersonalisation can then have a strong negative effect on the user’s SMS continuance. This study takes the interpersonal influences between users into consideration when investigating a user’s relationship with an SMS. The findings can provide several practical implications for an SMS user retention management.     

Determining Server Locations in Server Migration Service to Minimize Monetary Penalty of Dynamic Server Migration

In this paper, we propose a new class of service called server migration service (SMS) to augment the existing IaaS (Infrastructure as a Service). SMS allows servers (server-side processes of a network application) to dynamically and automatically migrate as their clients (client-side processes of a network application) change their locations in order to reduce the total monetary penalty that the SMS provider pays to its SMS subscribers when failing to provide them with the guaranteed level of QoS. In this paper, we consider the monetary impact that arises from QoS degradation due to server migration and build an integer programming model to determine when and to which location servers should migrate to minimize the total monetary penalty incurred by the SMS provider. Numerical examples show that SMS achieves up to 96% lower total monetary penalty compared to that without server migration. Numerical examples also show that the integer programming model developed in this paper requires reasonable computation time under realistic parameter settings.     

The Effectiveness of Short Message Service for Communication With Concerns of Privacy Protection and Conflict Avoidance

Why would people use Short Message Service (SMS) to say something they would not say in person? There is a trend that SMS is becoming more and more popular because it facilitates more extended modes of communications. Using technology acceptance model, we hypothesize the attitude of SMS would be influenced by its perceived effectiveness for communications, perceived ease of use, and subjective norm. Besides the special aspects of communications, conflict avoidance and privacy protection will enforce the impact of perceived effectiveness of SMS for communication. We investigated 953 SMS users and the results support most of our hypotheses. Furthermore, our analyses also show there are differences between females and males on the influence mechanism behind their attitude towards SMS.     

基于SMS的图书馆服务的研究与实践

随着移动通信技术的迅猛发展,图书馆开展移动服务已经成为一种趋势,而其中的SMS(Short Message Service)由于具备费用低廉、易于部署等特点已经成为了一种优先部署的服务。对图书馆短信服务的应用场景进行了分析,并且归纳比较了短信服务的三种部署模式(短信猫模式、申请短信SP资质以及利用SP的短信通道)的优劣性,在此基础上结合具体应用提出了SMS系统的技术体系架构和具体实现方案。     

Exploring factors affecting Chinese consumers' usage of short message service for personal communication

Abstract. Short message service (SMS) is very popular in China. While many reports indicate that the SMS market has great potential, little is known about why people adopt SMS. This study uses the technology acceptance model and network externalities to examine the factors influencing the adoption of SMS for personal communication in China. Using data collected from 262 mobile phone users, we find that perceived usefulness, perceived enjoyment and perceived service cost affect SMS use. Perceived network externalities also contribute to higher perceived usefulness and perceived ease of use and affect SMS adoption. The results provide insight to SMS marketing strategies.     

基于Android的高效短信查询软件的实现

分析了目前智能手机短信查询软件的不足,提出了一个比较高效的短信查询软件的实现方案,包括通过联系人查询短信、通过日历查询短信,以及通过关键词检索短信的实现方法等。介绍了Android平台下系统的实现过程,分析了不同场景下该软件的优势,总结创新点。     

短信网络及其几种模型的比较

为深入了解短信网络的拓扑结构和演化规律,对四种具有代表性的短信网络模型进行了比较,研究了每一种模型的网络参数,并指出其优点和不足,为进一步的研究指明了方向。研究证明,短信网络的度分布服从幂律分布,它是一种Scale-free网络,其幂律指数在2～3之间。短信网络具有较高的聚类系数和较小的平均路径长度,即具有小世界特性。     

安全短消息应用系统方案研究

随着短消息服务的发展和繁荣,基于短消息的应用(如移动电子商务)和攻击也越来越多(如窃听、欺骗、SMS FLOOD等),短消息服务的安全问题就显得非常重要,对短消息服务安全问题的研究也就成了目前相关领域研究的一个重要课题。该文对传统短消息系统应用架构进行分析,并对其可能的安全风险进行了总结,最后提出了相应的安全实施方案。     

基于XMPP技术的短信增值业务设计

针对现在XMPP(Extensible Messaging and Presence Protocol)即时通信所存在的服务手段单一问题,通过对XMPP协议分析,应用XMPP服务器的模块化结构,给出了一种结合现有短信协议来达到定制各种短信业务的新设计,并对系统实现方法进行阐述。