实验室多媒体教学影像处理的关键技术

本文探讨实验室多媒体教学影像处理的技术－图像压缩方法，并展望未来的图像压缩技术的发展，对应用广泛的DCT变换编码方案进行了较详细的研究。     

Graduate students’ perspectives on using e-books for academic learning

The purpose of this qualitative research was to explore (a) how graduate students interpret their experiences with the use of e-books for learning, (b) which reasons influence their preference for e-books or printed books when they learn, (c) how they perceive the impact e-books have on their learning, and (d) how they compare learning experiences between the use of a given printed book and an e-book containing similar content but also offering additional multimedia options. Participants consisted of 20 graduate students from one midsize university in the United States. The major findings of this research were that graduate students generally prefer using e-books to printed texts. When studying and preparing for an exam, however, graduate students will only supersede their familiarity with printed text if a given e-book offers similar content as the printed text and provides additional resources. Research implications and recommendations for future research were also provided.     

基于帧间预测码运动补偿算法

着重讨论帧间预测码运动补偿算法，该算法可获得比一般的运动块匹配方法更大的峰值信噪比。该基于小波变换域的块搜索匹配算法，在运动比较平缓时能以很少的运算次数马上找到块匹配点；在运动非常激烈时，则首先采用小波变换，然后再用本方法进行块匹配搜索，可减少大量复杂的运算量。     

跨文化交际中英汉语的语义差异研究

跨越不同文化背景的交际经常会发生故障,这种故障通常是由于交际双方不了解不同文化中的语言意义差异而造成的。研究其语义差异,根本原因在于语义交际背后的文化系统存在着质的不同。     

关于微格教学的设计方法

微格教学的目的是培训师范生或在职教师的教学技能。文章对微格教学的设计方法进行了系统的阐述，为微格教学的开展提供了必要的理论依据。     

Systematic lossy error protection based on H.264/AVC redundant slices and flexible macroblock ordering

INTRODUCTION In typical video transmission systems, a video signal is compressed, and the resulting bit stream is transmitted over an error-prone channel. The errors may consist of symbol errors caused by fading, as observed for wireless channels, or packet erasures caused by congestion, as observed in the Internet. If a received video packet contains errors, then the portion of the video signal contained in the packet is lost and must be concealed. Error concealment schemes alone cannot …     

对未来中文信息处理拼音文字性编码方案的初步设计

以汉语拼音方案为基础,借鉴早期国语罗马字拼音法式的优缺点,创造性地设计了一种全新的汉语拼音文字性编码方案.该方案在拼写法上实行声调和韵母合一拼写,即用一个特定的字母组合同时表示特定的声调和韵母,拼写法简短,规则高度简单,对同音不同调汉字的各种拼写法相互之间一律前同后异,非常利于思维、运用和记忆.同时,主张适当地精简同音汉字,并对汉字进行部首规范提出了独到的建议.     

标准汉字库字符的拼音首字母自动提取

在应用程序，特别是数据库管理系统中经常要求输入汉字，以进行各种查询操作，这是非常低效而烦琐的事情，如果能以汉字拼音首字母来取代汉字的输入，将极大地提高查询操作的方便性和查询效率．通过对汉字内码的剖析，提出针对一、二级汉字库字符拼音首字母的提取方法，并设计相应函数，以满足应用系统的开发需要。     

果蝇内含子和编码序列的信息参数D_2沿染色体分布

本文以果蝇染色体的内含子和编码序列作为研究对象,用信息参数D2分析两类序列沿着染色体的分布规律,并用多项式拟合分析染色体各类序列沿染色体的统计分布特征,分析D2参数的平均值在不同的染色体臂的分布特征.     

LDPC based time-frequency double differential space-time coding for multi-antenna OFDM systems

INTRODUCTION High data rate and high quality multimedia ser- vices are required in beyond third generation (B3G) and fourth generation (4G) mobile communications. Space-time coding scheme has been proposed (Tarokh et al., 1998; 1999) to achieve higher capacity and data rate. So far, most research on space-time coding assumed that accurate channel estimations are available at the receivers. However, accurate channel estimation is difficult and too many training symbols are required in a r…