查询词典 retrieval

The phase of optical wave can be recovered by the intensity transport equation under the paraxial approximation For the optical system with diffraction limit, it is difficult to get the boundary radical slope of phase and sample in the circular domain boundary when using the intensity transport equation to recover the phase, consequently, we reviewed an algorithm mentioned in the reference ［4］, namely, the equation, computation domain and boundary condition are changed, then the phase is reconstructed by the multigrid method and corrected at last Moreover, the experiment system is set to testify the algorithm, and the recovered phase from the intensity data detected by CCD is compared with the result from phase retrieval algorithm, it is found that the phase reconstruction error can reach 017 λ in the case of non-uniform intensity distribution, as a result, the method is suitable for the phase recovery with low wavefront sensing accuracy.

在傍轴近似条件下，可以利用光强传播方程对畸变波前进行相位恢复。对于衍射受限的光学系统，很难获得相位的边界径向斜率值作为边界条件，此外，要获得精确的圆域边界采样值也并非易事。为了克服上述困难，进一步研究了相位恢复改进方法，即改变了方程的表示形式、计算区域和边界条件，并用多重网格法进行求解获得重构相位，最后再将其修正。为了验证算法的精确性，搭建了实验系统对算法进行实验验证，将由CCD探测的光强分布进行计算得到的相位分布与相位恢复算法的结果进行比较，证明在光强分布非均匀的情况下，该方法恢复的相位均方根误差能够达到017 λ，可以适用于波前传感精度要求不是很高的相位恢复。标签自适应光学相位恢复相位修正光强传播方程 adaptive optics phase retrieval phase correction intensity transport equation

It's obvious that semantic retrieval is more reasonable than retrieval based on low features. So we need to study image retrieval based on region segmentation, image hierarchical classification and image semantic label standard.

显然语义级检索是比基于低层特征检索更合理的图像检索方法，因此有必要研究基于区域分割的图像检索、基于语义级的图像分级分类和图像的语义标记标准。

In this paper, three methods for color image retrieval have been presented: hypercomplex SVD image retrieval, combination of hypercomplex convolution filter and hypercomplex SVD image retrieval and hypercomplex matrix correlation image retrieval. We made comparison among these hypercomplex-methods, and compared them with the traditional image retrieval methods. Experiment results showed that the hypercomplex-methods we presented in this paper could well conquer the problems existed in traditional image retrieval methods, and their retrieval results are much better. Meanwhile, this paper presented a new color image quality assessment based on hypercomplex SVD. It is a novel color image quality assessment that can be used as a graphical or a scalar measure to predict the distortion introduced by a wide range of noise sources. It reliably measures the distortion not only within a distortion type at different distortion levels, but also across different distortion types.

提出了超复数奇异值分解检索法，超复数卷积滤波与超复数奇异值分解相结合的检索法以及超复数矩阵相关检索法等三种超复数彩色图像检索方法，在对提出的三种算法进行比较的同时也将其与传统图像检索方法进行了比较，结果证明，超复数彩色图像检索法能较好地克服传统图像检索方法存在的问题，且检索结果更优；同时，本文提出了基于超复数奇异值分解的彩色图像质量客观评估法，这种全新的图形化与数值化相结合的方法不仅能够准确评估出彩色图像的不同失真等级，还能够区分不同的失真类型，从真正意义上实现了彩色图像的质量评估。

MEDLARS (MEDical Literature Analysis and Retrieval System) is the computerized system of databases and databanks offered by the US National Library of Medicine.

MEDLARS --Medical Literature Analysis and Retrieval System，由美国国立医学图书馆研制与开发的当今世界上最有权威的医学文献数据库检索系统。

To implement the personalized retrieval, this system firstly store the user's initial info into the database via the Frame Format, and the user's knowledge repository can be modified automaticly by user's retrieval information and the feedback information of the retrieval result.

个性化检索的实现，首先是通过知识表示中的框架表示法对用户的知识信息进行存储，并在用户使用系统的过程中由用户的检索兴趣和对检索结果的反馈信息对用户知识做动态更新。

Where, in the International Phase, when the international retrieval entity or international preliminary examination entity considers the international application is not in conformity with the requirement of singularity provided in the Patent Cooperation Treaty, the applicant does not pay the additional fee as provided, thus causing some parts of the international application to not undergo international retrieval or international preliminary examination, or when entering the National Phase in China, the applicant requires the above-mentioned parts to be regarded as the basis of examination, and the administrative department for patent under the State Council considers the singularity of the invention has been well-judged by the international retrieval entity or the international preliminary examination entity, it shall notify the applicant to pay the fee for recovering singularity within a specified time limit.

在国际阶段，国际检索单位或者国际初步审查单位认为国际申请不符合专利合作条约规定的单一性要求时，申请人未按照规定缴纳附加费，导致国际申请某些部分未经国际检索或者未经国际初步审查，在进入中国国家阶段时，申请人要求将所述部分作为审查基础，国务院专利行政部门认为国际检索单位或者国际初步审查单位对发明单一性的判断正确的，应当通知申请人在指定期限内缴纳单一性恢复费。

The main works of this paper include four points as follows:(1) Patent retrieval domain ontology is designed through analyzing the common concepts in searching patent information. And the international patent classification table is expressed using ontology;(2) Design users'interests model from the information actively provided by users and passively provided by system based on users'requirements and historical searching record;(3) Design and implement three patent retrieval modes: quick search, table search, and advance search to meet various users'demands. And combine ontology, user's interest model and the inputed retrieval condition when users search for patent informations. This realizes individualized retrieval which meets the demands of users;(4) When users's search term is inaccurate, the precision will drop markedly and users will receive many disrelated informations.

本文的主要工作包括以下四点：(1)通过分析专利检索的常用概念，设计了专利检索领域本体和国际专利分类表(International Patent Classification，IPC)的本体表示；(2)根据用户的需求以及历史检索记录，从用户主动提供和系统被动学习两方面着手，设计了用户兴趣模型的本体表示；(3)为满足不同层次、不同需求的用户，设计并实现了三种专利检索方式：快速检索、表格检索、高级检索，并将本体、用户兴趣模型、用户输入的检索条件三者相结合，实现满足用户需求的个性化检索；(4)通过设计将检索结果按IPC号分类，由用户自主选择需要浏览的类别来为用户提供个性化服务。

In view of the situation that existing search engines cannot follow up the change of webpage and their low precision in information retrieval, the dissertation suggests an idea of personalized information retrieval service, and establish a user model for personalized information retrieval based on user partialness keyword list on client server, which can supply personalized information retrieval service for user with the communications and collaboration of all modules of it.

本文针对利用现有的搜索引擎进行信息检索的过程中存在的查准率低和用户无法跟踪网页信息变化的缺点，提出面向用户的个性化信息检索服务理念，在客户端建立基于关键词表的用户个性化信息检索模型，通过用户个性化信息检索模型内部各功能模块之间的通信协作达到面向用户的个性化主动信息检索服务。

Information retrieval technology is developing in individualization and intelligent direction, individualizing and intelligent information retrieval feedbacks the retrieval results to the users as the retrieval needs of users.

信息检索技术正朝着个性化、智能化的方向发展，个性与智能的信息检索根据用户的检索要求将信息查询结果反馈给用户。

The method provides a source information storage and retrieval system, a target information storage and retrieval system, and a master controller capable of communicating with the source information storage and retrieval system and with the target information storage and retrieval system.

该方法提供源信息存储和检索系统、目标信息存储和检索系统、以及能够与源信息存储和检索系统和目标信息存储和检索系统通信的主控制器。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。