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2008年CKC杯全国纵横汉字输入大奖赛于8月1519至16日在苏州举行。纵横汉字输入法是由香港爱国实业家周忠继先生根据中国汉字结构的特点,经过数十年研发而成的形码编码方案。该发明已获两项国家专利。目前。“纵横码”已在大陆十多个省（市）和香港特别行政区、台湾地区推广应用,纵横信息数字化学习研究实验已被列入国家社会科学基金“十一五”规划（科学教育）国家课题。 相似文献
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The increase of frame rate, though with the potential in a coded ultrasound system, is generally concomitant with the simultaneous transmission of a number of apertures, and in consequence leads to increased cross-talks between different apertures. In view of this, a new coding scheme using staggering repetition interval was proposed. The transmitting signals were constructed by repeating the two （or more） modulated codes using staggering repetition interval, and then allocated to and transmitted simultaneously among different apertures. The decoding process was based on the subsection-matched filter under the assistance of different matched filters for different apertures. At last the outputs of subsection-matched filtering were added together. Staggering changed the positions of cross-correlation （CC） peaks from coinciding, which resulted in an effective reduction of CC. Our theoretical analysis and simulations showed that, the coding scheme can be used to reduce cross-talk, and a good cross-talk reduction will be achieved if the staggering delay is kept in an appropriate range. 相似文献
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传统的空时分组码是在反射端不知道任何信道信息的情况下进行的,介绍了利用相位反馈来使扩展正交空时分组码在多个发射天线上的传输速率达到满速率的一种新方法,这种方法不仅可以改善系统的性能,获得满分集增益,并且其解码复杂度很低。 相似文献
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近年来,我国地理信息产业高速发展,在国家、省级基础地理信息数据库和数字城市建设中积累了多源、多类型、多比例尺和多时相的地理信息数据,但是这些数据基于不同坐标系和空间定位基础,虽然国家标准规定其他坐标系应与国家坐标系建立关联,但是普通用户无法获取转换参数、算法或换算表完成数据在不同系统之间的转换,给地理信息数据社会化应用和服务带来了困难。为推进空间数据服务,满足公众需求,解决空间定位和寻址问题,迫切需要建立一个支持公众使用和交流位置信息的统一地理格网编码系统。 相似文献
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Labeling information in a complex irregular region is a useful procedure occurring frequently in sheet metal and the furniture industry which will be beneficial in parts management. A fast code-based labeler （FCBL） is proposed to accomplish this objective in this paper. The region is first discretized, and then encoded by the Freeman encoding technique for providing the 2D regional information by 1D codes with redundancies omitted. We enhance the encoding scheme to make it more suitable for our complex problem. Based on the codes, searching algorithms are designed and can be extended with customized constraints. In addition, by introducing a smart optimal direction estimation, the labeling speed and accuracy of FCBL are significantly improved. Experiments with a large range of real data gained from industrial factories demonstrate the stability and millisecond-level speed of FCBL. The proposed method has been integrated into a shipbuilding CAD system, and plays a very important role in ship parts labeling process. 相似文献
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科技的迅猛发展给音乐带来了意想不到的发展机会。MP3播放器无疑是音乐史上极具颠覆性的传播媒介。由于MP3播放器的生产成本较低、外观可塑性强,并且可置于手机等不同产品中,满足了不同消费者的需求,因此,受到了不同层次消费者的青睐。另一方面,MP3格式是世界上第一个有损压缩的编码方案,基本上所有的播放器 相似文献
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为满足地理信息系统(GIS)技术发展对地理要素属性在编码体系的完备性、严密性方面的更高要求以及在属性数据组织方面的表结构化要求，提出了一种新的、适应GIS发展需要的通用型军用地理要素属性编码方案。 相似文献
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本文提出一种新的支持XML数据动态更新的编码方案（DUCX）,并建立了支持XML数据动态更新的索引,提高了查询效率,支持单支、多支查询和多文档。 相似文献
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本文在多输入多输出(MIMO)系统中提出了4×2MIMO、发送数据流为2的系统的预编码方案,该方案不需要反馈CSI.接收端以均方差(MSE)最小准则从码本中选择一个编码矩阵,然后反馈该码字的索引. 相似文献