context n. 1.上下文;文章的前后关系[脉络]。 2.(事情等的)关节,范围,场合,处境,条件;来龙去脉。 tell the meaning of a word from its context从一个字的上文下推知其字义。 in one context 在一定场合,在某一范围内。 in the context of 在…情况下。 in this context 关于这一点,在这种场合下。 outside the context of 在…之外。
To eliminates spatial - redundancy , improved the forecast model of jpeg - ls ( lossless and near - lossless compression standard of jpeg ) which based on context is used . and the paper designs a spectral - forecast model to eliminate spectral ? redundancy . using these two forecast models together , spatial - redundancy and spectral - redundancy are eliminated 改进了jpeg - ls ( losslessandnear - losslesscompressionstandardofjpeg )的基于上下文的预测模型来处理空间冗余;为了处理谱间冗余,本论文开发了一种谱间预测模型。
However , there still exists correlation between coefficients of sub - matrices after 4d - mdct . this thesis proposes a four dimensional matrix video coding method based on context to get rid of the correlation between coefficient sub - matrices further . it includes three parts as follows : firstly , this thesis presents a four - dimensional matrix video encoder and decoder model , which contains components of prediction , transform and entropy coding 实验结果表明,该方法与传统的二维编码方法相比,具有高压缩比和高图象质量的优点;与矢量量化编码相比,具有码表体积小,计算复杂度低的特点;与霍夫曼编码方法相比,在相同信噪比的条件下,对运动相对剧烈的视频序列压缩效果要更好。
In the processing of unstructured optic data pretreatment , this article puts forward a completed new algorithm of automatic chinese word segmentation based on context : combining chinese word frequency based on context and keyword dictionary can completes efficiently chinese word automatic segmentation ; and also presents a new computer automatically classification way about optic articles specialty classification : through adding optic subject classification property on optic keywords and computing the proportion of optic keywords in the article , quantificationally classifies optic articles 在非结构化光学数据的结构化处理中,本文提出了一种全新的中文全文汉语自动分词算法:引入上下文相关的词频,结合关键字词典,高效地完成中文汉语自动分词;另对光学文献的专业分类,也提出了一种新的计算机自动分类方法:即通过对增加光学类关键字的光学学科分类属性,计算光学文章中出现的各个所属光学学科类关键字的比例关系,定量地对光学文献进行分类。
As a member of the team researching and developing the new generation of atc ( air traffic control ) system ( named mrd2k - jh ) for chinese air force , the author devotes his energies in the work of fdp ( flight data process ) . this thesis first introduces what is atc system and the present status of atc systems in china , then sets forth the design and structure of the new mrd2k atc system , based on the research and adjustment to the actual environment , essential technical points of fdp are presented in detail : the interface of traffic telegram and decoding algorithm : in this part , the application interface of eicon x . 25 card for mrd2k is introduced , and then the realization of a decoding algorithm based on context - free grammar is described in detail , which replaces the traditional method that decoding each telegram using a corresponding subprogram 本文基于我国新一代军航空中交通管制( airtrafficcontrol )系统mrd2k - jh的研制开发过程,首先介绍了空中交通管制系统的概况和现状,然后从建立空管自动化系统的角度阐述了mrd2k的详细设计和系统结构,接着结合作者参与的系统重要部分飞行数据处理( flightdataprocess )的工作,在进行了大量深入研究和与实际环境相切合的基础上,针对其中的诸多技术细节,提出了经实际验证富有效用的解决方案。
There have been two type of embedded coding . the first is based on partial order and self - similarity between subbands of wavelet coefficients , which organizes the wavelet coefficients across subbands into a zerotree , while the second is based on context models , using the correlation of neighboring wavelet coefficients 目前,嵌入编码都是基于两种类型:一种是分层的嵌入编码,主要是利用小波不同子带间系数的偏序性和自相似性,将不同子带间的系数形成一棵棵树结构,通过将整棵树量化为零来减少压缩比。
With a reference of others " work , he designs a set of chinese language segmentation and categorization algorithm without the support of dictionaries . thus he develops an automatic text classification software and suggests further solutions to problems such as how to apply this technology to a multimedia database , and realize the media search based on contexts not keywords . with that , the author gives the main plan and overall design of his software 在前人研究成果上,予以创新,设计了一套无需词典支持、简单易行的中文分词和分类算法,开发了“文档自动分类软件” ,并对如何将这一技术与多媒体素材库相结合,实现对媒体素材的模糊查询和智能分类等问题进行了探讨,给出了软件设计的总思路和总方案。
Based on our research projects supported by the national natural science foundation of china , some research results were described , including the model of multimodal interaction based on context awareness , chinese characters multimodal inputted for the handheld mobile devices , and the principles of improving web interaction on the small screen terminals 摘要叙述了在手持移动计算设备上的基于上下文感知的多通道交互模型、多通道汉字输入、移动计算中的小屏幕网络浏览策略等方面的研究成果。