In the system , key word networks and low - level feature table are both established for images , which realized double indexing ; relevant feedback is also applied in the system . on one hand , it enables the system catch users " query intention on line by adjusting its similarity criterion automatically ; on the other hand , it pass the annotations for relevant images , update weights between key words and images and fill the semantic networks , thus the system can study in long - term 此系统为图像构建语义关键字网络，并建立低层特征库，对图像实行特征和语义的复合索引；通过相关反馈技术一方面在线理解用户的查询意图，自动调整相似度测量准则以符合用户需求；另一方面给相关图像传递语义标注，更新相关性强度，充实语义网络，实现长期的学习和记忆。
In the meanwhile , according to the quite different demands which the overall performance of the ota imposes on its input and output cells , utilizing characteristics of switched - capacitor and common - mode feedback circuit , continuous common - mode feedback method and switched - capacitor method have been applied to the input and output cells , respectively 同时,根据ota整体指标对输入级和输出级单元不同的性能要求,并结合连续型共模反馈电路与开关电容型共模反馈电路的各自特点,将连续型共模反馈和开关电容共模反馈技术分别应用于运放输入级和输出级单元。
Several key techniques corresponding to m a in six steps in region - based im a g e retr ieva l are introduced in detail . also com b ing with active resear ch in this area , a n approach of building region and im age se m a ntic networks and applying relevance feedback for im proving on retrieval ef ficiency of based on the low - level features is presented 本论文针对基于区域语义和低层特征图像检索的6个步骤，详细介绍了该领域的关键技术，并结合目前国内/外在这一领域的研究热点，提出了建立区域语义网络和应用相关反馈技术改进基于低层特征检索效果的方法。
Content - based image retrieval ( cbir ) and relevance feedback technology , is the one of top research domains , which is the solution of image retrieval problem , but retrieval precision and retrieval by semantic is yet the problem requiring to research , they are something required to research that image content description for content retrieval and data model , high dimension image feature vector " calculation , the structure and index of image database , etc . contraposing to the actuality and developing trend of content - based image retrieval research , . we lucubrate on cbir , relevance feedback arithmetic and semantics of image extract , simultaneously research associated problems 基于内容的图像检索和相关反馈技术，是当前研究的热点之一，是解决图像检索问题的有效手段，检索精度和语义检索仍然是需要继续研究的问题。对用于内容检索的图像内容描述和数据模型，高维的图像特征向量的计算，图像数据库的结构和索引都需要进行研究。针对基于内容的图像检索研究的现状和发展趋势，本文主要对基于内容的图像检索中相关反馈算法以及利用相关反馈提取图像语义作深入研究，同时研究了与其相互关联的几个问题。
To quicken the dynamic response of asi , a current - mode control technology with instantaneous capacitor - current feedback is adapted in this paper . inverters with this technology have advantages in dynamic response , output characteristic , the adaptive capability in nonlinear load compare to traditional inductor - current feedback 为提高航空静止变流器动态特性，本文采用输出电压和电容电流瞬时值反馈技术，较传统的电感电流控制技术，具有动态响应快、外特性好、非线性负载能力强等优点。
