浅析单片机开发板的设计与制作

目前人们对于单片机开发板的研究逐渐增多,要了解单片机开发板就要先了解其理论知识,单片机开发板是一种实践工具,在对其进行研究的过程中就可以掌握所学知识,进而完成开发板设计与调试,通过这种措施也可以完成开发板设计,本文将从单片机开发板设计思路入手,结合单片机开发板设计任何与功能要求,研究开发板电路的设计与制作。     

基于PowerPC的嵌入式MPEG4视频解码器的设计与实现

阐述了XILINX公司Virtex Ⅱ Pro系列FPGA的硬件结构,介绍了MPEG4 SP及其解码过程.以ML310开发板为平台,利用Virtex Ⅱ Pro系列的XC2VP30芯片实现了基于PowerPC405的嵌入式MPEG4 SP视频解码器.通过对硬件的配置和软件的优化,使系统能够完成QCIF格式的视频序列实时解码.     

基于MYSQL数据库的电子邮件通讯录设计

企业级电子邮件(For-Mail)系统是基于MXSQL数据库的CGI(通用网关接口)程序进行开发的．其通讯录又分为个人邮件地址管理和组邮件地址管理两个部分。本文主要通过以下三个部分，完成了对该通讯录的实现过程的描述：后台封装函数(提供给CGI程序调用的数据库操作函数)、CGI程序的工作流程以及对该通讯录的一些改进。     

基于树莓派开发板的车辆识别系统设计

本设计着手于具有较大实用价值的“车牌识别”,用小巧的嵌入式开发板接入互联网,实现物联网技术下的车辆识别.该系统主要由嵌入式开发板、摄像头、台式机组成.嵌入式开发板采用当下流行的树莓派开发板,负责调用外置的摄像头模块采集车牌照片,配合在云端的台式机,将采集好的相片通过互联网上传至台式机,台式机处理传送来的车牌照片,并返回识别结果,从而完成整个识别过程.     

基于Linux视频传输系统的设计与实现

给出了在Linux系统下实现视频采集、数据传输以及视频显示的实现方法。该方法利用ARM开发板内核中的V4L2协议来完成图片的采集过程,并通过Linux下Socket编程实现图片数据从采集端到显示窗口的传输,视频显示终端则是基于Linux下Qt开发的数据窗口部件来实现的。     

基于FPGA的VGA图形控制器设计

利用FPGA设计并实现了一种VGA图形控制器。根据VGA显示原理,利用VHDL作为逻辑描述语言,在Xilinx的开发板Nexys2上完成了设计的功能。通过按动开发板上的按键可切换显示屏显示的图形,可实现横条纹、竖条纹、方格棋盘等8bit彩色图形的显示。     

电路分析实验开发板的设计

本设计利用虚拟仿真技术,结合ELVES Ⅱ平台,完成了对电路分析实验开发板的设计。实验开发板包含叠加定理、戴维南定理、RC一阶电路的响应及R、L、C串联谐振电路分析四个实验模块,通过Multisim软件对上述实验模块进行虚拟仿真,得到与理论分析一致的结论。通过设计电路板并焊接元件制作了实物,通过NI ELVES平台对实验开发板进行了实际测试,实现了验证叠加定理、戴维南定理、RC一阶电路的响应及R、L、C串联谐振电路分析四个实验的功能。设计的开发板操作简单,能够实现电路分析课程教学内容的仿真与展示,更好地激发学生的学习兴趣。该教学平台能与配套实验课程对应,为实验教学提供一种现代化的教学手段,进一步促进高校开放性实验室的建立。     

基于PXA255嵌入式平台的MPEG-4编码研究和实现

文章介绍了基于Xscale处理器(PXA255)的嵌入式开发平台上实现MPEG-4编码技术;整个系统分为视频信号采集、编码、存储、发送、PC机上解码验证;通过FS-PXA255I开发板上的USB接口实现视频信号的采集,利用PXA255处理器完成输入图像的MPEG-4软件编码;阐述系统总体结构和各部分功能特点,着重介绍MPEG-4编码部分在嵌入式系统上的编码算法。     

基于Android的通讯录实时同步功能

随着Android系统的不断发展,Android系统被应用在各种设备上面,包括将Android系统应用到有线电话上.因此需要开发一个通讯录能够在搭载了Android系统的有线电话和手机之间实现数据实时同步.通讯录的客户端和服务端是通过Socket来建立连接的,然后采用Handler机制发送数据和读取数据,实现了通讯录数据的实时同步.经过测试,通讯录实现了手机与有线电话的通话记录,增加、修改和删除联系人的实时同步功能.     

将指定联系人快速分享给同事

小秦前不久新入手了一台华为的C8812E智能手机,通过QQ通讯录在云端完成了单位员工通讯录的整理工作,适当分组之后,通过QQ同步助手将其同步到C8812E手机.同事老周听说此事之后,也请小秦将这份通讯录贡献出来,这自然不是什么麻烦事,但小秦已经在通讯录中添加了一些自己的朋友,直接共享出去显然不太方便.     

Adapting the mobile phone for task efficiency: the case of predicting outgoing calls using frequency and regularity of historical calls

The set of functionalities provided by advanced mobile phones is significantly increasing. However, the small size of mobile phone user interfaces makes it difficult for the user to deal with this large number of functionalities, which could reflect negatively on user performance and the efficiency of mobile phone functionalities. In this paper, we designed and developed an adaptive task-based functionality called ATF on mobile phones, where the task we focused on was to predict the next contact that the user is most likely to call. Furthermore, we conducted comprehensive evaluation of our approach. We show that our approach can successfully predict contacts that a user will most likely call next. Our results uncover the frequency and pattern of regularity in making mobile phone calls and suggest promising avenues for future work for optimising tasks (beyond phone calls) performed with the mobile phone.     

Comparative studies of perceived vibration strength for commercial mobile phones

A mobile phone, also known as cell phone or hand phone, is among the most popular electrical devices used by people all over the world. The present study examines the vibration perception of mobile phones by co-relating the relevant design parameters such as excitation frequency, and size and mass of mobile phones to the vibration perception survey by volunteers. Five popular commercially available mobile phone models were tested. The main findings for the perception surveys were that higher vibration frequency and amplitude of the peak acceleration would result in stronger vibration perception of the mobile phones. A larger contact surface area with the palms and figures, higher peak acceleration and the associated larger peak inertia force may be the main factors for the relatively higher vibration perception. The future design for the vibration alert of the mobile phones is likely to follow this trend.     

基于衰减窗口的通讯录搜索技术

随着智能手机的不断普及,通讯录和记事薄等记录信息条目数量飞速增长,寻求高效快速的搜索技术得到高度关注。提出一种高效快捷的通讯录搜索技术。以联系人姓名全拼和姓名拼音首字母组合为搜索条件对联系人进行基本搜索,同时采用数据流的衰减窗口思想模拟移动终端机主的思维模式,将联系人通信紧密度作为排序参数对搜索结果进行排序来实现输入最少线索搜索到目标联系人。将这种技术应用于Android手机操作系统,这种通讯录搜索技术也普遍适用于各种流行智能手机操作系统,并可以推广到企业通讯录等搜索应用中。     

基于BREW平台支持IMAP4的智能手机邮件客户端的设计与实现

为了实现支持IMAP4协议的移动邮件客户端在智能手机上的应用，在VC++6.0环境下，采用了高通推出的专门为无线设备设计的BREW平台。提出了原子流程的概念，以降低程序间的耦合度，提高代码复用率。经在仿真环境下测试实验，实现了与Internet上多台常用邮件服务器的交互，并且运行稳定，可作为智能手机的一个组件应用于3G网络。     

Humans' attachment to their mobile phones and its relationship with interpersonal attachment style

Humans have a biological predisposition to form attachment to social partners, and they seem to form attachment even toward non-human and inanimate targets. Attachment styles influence not only interpersonal relationships, but interspecies and object attachment as well.We hypothesized that young people form attachment toward their mobile phone, and that people with higher attachment anxiety use the mobile phone more likely as a compensatory attachment target. We constructed a scale to observe people's attachment to their mobile and we assessed their interpersonal attachment style.In this exploratory study we found that young people readily develop attachment toward their phone: they seek the proximity of it and experience distress on separation. People's higher attachment anxiety predicted higher tendency to show attachment-like features regarding their mobile. Specifically, while the proximity of the phone proved to be equally important for people with different attachment styles, the constant contact with others through the phone was more important for anxiously attached people.We conclude that attachment to recently emerged artificial objects, like the mobile may be the result of cultural co-option of the attachment system. People with anxious attachment style may face challenges as the constant contact and validation the computer-mediated communication offers may deepen their dependence on others.     

Extending family to school life: College students’ use of the mobile phone

The current study seeks to understand if there is a pattern between college students’ mobile phone usage and their family members at home, and to what degree it affects their college life. Three focus group interviews were conducted on February 1, February 2, and February 15, 2006. A total of 40 undergraduate students who were majoring in communication studies participated in the study. One of the main findings is that the mobile phone is “a must” for college students to keep in contact with their family. Other findings suggest that college students use mobile phones to have more frequent contact with their family and to fulfill family roles. College students also utilize mobile phones to share experiences and emotional and physical support with their parents.     

手机取证技术研究

随着移动通信技术所提供服务水平和服务种类的不断提高和扩充,手机已日益成为人们工作生活中不可或缺的联系工具.与此同时,手机犯罪现象作为高科技犯罪的一种也随之涌现,亟待研究相应的对策加以应对.本文主要从手机证据的来源和获取两个方面对手机取证技术进行了研究,并介绍了一些常见的手机取证软件.     

手机仿真取证系统浅析——Android系统仿真实战

随着各种手机的推广,手机应用程序的极大丰富,在实际取证工作中,我们经常会遇到对各种手机的应用程序取证,而现有对手机应用程序的分析技术刚刚起步,要实现对大部分应用程序使用痕迹的取证需要一段较长的时间。如何快速对手机应用程序进行取证成为取证工作的一个重要。因此本文提出了一个手机仿真取证系统的解决方案,并以Android系统为例进行介绍。     

3G手机的BREW游戏设计与实现

BREW是美国高通公司为手机的增值应用所提供的一套完整的开发平台。开发人员可以利用BREW平台提供的计算机上的仿真环境进行手机游戏开发,然后通过本地下载或者无线下载装到手机上运行。通过一个游戏实例对在BREW平台上设计和开发3G手机游戏的方法和实现技术进行了分析,包括资源器编辑、程序设计和开发、计算机仿真等过程。