差分跳频系统中跳频图案的构造

扩频通信具有抗干扰能力强、保密性好和码分多址的组网功能等优点,成为通信领域的一个重要发展方向。跳频通信是最重要的一种扩频方式,并已经在军事通信领域和许多民用通信系统中得到广泛应用。差分跳频技术是近年来提出的通信新技术,跳频图案的选择对跳频通信系统的性能有非常重要的影响。     

职业院校课堂手机与班级管理策略摭探

智能手机的普及,为职业院校课堂的手机与班级管理工作带来了挑战。文章在分析职业院校课堂上学生使用手机的原因及其产生的不良影响基础上,提出职业院校课堂手机与班级管理对策。教师应通过培养学生新媒体素养、增强课堂趣味性、加强民主管理等有效措施,提高职业院校课堂手机与班级管理工作的质量和效率。     

漏洞监管中的“拇指”传播——当代短信传播的认同与困境

手机短信作为第五传媒的雏形,对人们的社会生活产生了很大的影响,它通过定制、转发、群发、保存和回复等方式传播了丰富的短信新闻、短信广告,参与了广电传媒的节目互动,也制造了大量的短信陷阱,短信在以自由选择性、交互性、便捷性进入大众文化空间的同时,也扩大了低俗信息的传播,助长了狂热的消费欲望,怂恿了更加隐蔽的诈骗行为。     

移动群智感知框架下的能源有效性方法研究

移动群智感知任务中的数据类型多以图片和长视频为主,因而在其任务执行过程中容易造成大量能耗。以提高群智感知框架下的能源有效性为研究目标,以手机电量消耗为能耗指标,提出面向单体节能技术与面向全局节能技术相结合的方法,实现手机能源最大化利用。结合Android开发过程中的部分算法优化与移动群智感知任务执行中的节能模块（文本转换模块、图片压缩模块、视频压缩模块等）,实现单体能耗更低。在此基础上,结合面向全局的参与者优选模型,选择合适的执行团队用更少电量完成一定量任务,实现能耗最小化。通过实验设计和验证,使用单体节能与整体节能相结合的节能方法,在降低整体能耗时能够将手机能耗降低至少20%。     

一种基于实时行为控制的快速移动机器人

This paper discusses and compares some common architectures used in autonomous mobile robotics. Then it describes a behavior-based autonomous mobile robot that was implemented successfully in the Robotics Lab of the Department of Precision Mechanical Engineering. Fuzzy controller was used to implement the emergency behavior, the behaviors arbitration was implemented using the sub-sumption architecture. In an unknown dynamic indoor environment, the robot achieved real-time obstacle avoidance properties that are cruel for mobile robotics.     

学生参与教研的形式与效果初探

学生作为教学活动的主体，理应成为教研工作的参与者．根据“学生代表参与评课”和“师生交流会”开展教学研究的实践、总结与分析，探讨了学生参与教研的形式与效果，为学校教研工作的有效开展提供借鉴．     

Applying multi-touch technology to facilitate the learning of art appreciation: from the view of motivation and annotation

Handheld technologies with multi-touch functions have been embraced by the young generation and become their important tool for social and learning purposes. The purpose of this study was to explore how the state-of-art devices could be integrated into authentic art appreciation courses to motivate and enhance students’ learning. It was conducted in a class entitled “Art and Society” at a university in northern Taiwan. A total of 118 college students participated in this study. They were divided into two groups instructed by two approaches: the experimental group used digital materials with multi-touch technology, and the control group used both slides and printed materials. Both qualitative and quantitative approaches were adopted in this study. The results indicate that there were statistically significant differences in learning motivation, with a higher level achieved by the experimental group than the control group. The interactive multi-touch operation allowed students to use annotation skills and graffiti to create visual comments that could be edited, reused, and shared easily among group members. This study further discusses the role of tablets, students’ special annotation strategies, and the features of the tablets as superior to the conventional approach.     

Computer-mediated communication for teenage students: a content analysis of a student messaging system

This paper documents an exploratory study investigating the patterns of communication and the contents of the messages of an electronic messaging system set up specifically for teenage students in Hong Kong. The results of this investigation suggest that this undirected and unco- ordinated public messaging network was used both for socializing and information exchange. There was in general a lack of in-depth communication and the network users were not keen to involve themselves in serious discussions. It is suggested that a co- ordinator is needed to facilitate in-depth and task-specific discussions in a public messaging system     

卫星通信中载噪比与误码率的关系及测试分析

立足已广泛使用的IDR／IBS体制，从诸多参数的概念入手，深入的论述了卫星通信中载噪比、信噪比与误码率的关系，以及如何利用频谱分析仪准确测量接收卫星信号的载噪比。通过测试分析，最后指出不能为降低误码率而刻意提高（C0＋N0）／N0，必须经过认真的测试调整，寻求两者之间的最佳值。     

谈移动通信技术对通信工程专业学生的重要性

近年来,随着通信技术的不断发展,移动通信技术变得至关重要,被各行各业广泛地应用,而对于大学之中通信工程学生来说,为了适应未来社会的发展,教师需要对学生对于移动通信技术的学习进行指导,让学生认识到其重要性,提高学生的专业素质,完成预期的学习任务,本文是以大学之中通信工程专业学生为研究对象,分析移动通信技术在通信专业学生之中的应用。