查询词典 information retrieval

In Content-Based Image Retrieval area,features extraction and matching are the key technique for image retrieval.

在基于内容的图像检索中，图像特征的提取和特征匹配是图像检索的核心。

In the paper,a fast image retrieval method based on the DCT domain and correlative feedback is presented,which aims at JPEG images and uses color layout descriptors in the MPEG7 standard. As the method only needs entropy decoding,the speed of extracting image features is improved and storage space saved. The experiment result shows that the method has a high retrieval speed and a good effect.

文章针对JPEG压缩图像，结合MPEG 7中建议的颜色布局描述符，提出一种带相关反馈的基于DCT域的快速图像检索方法；该方法只需要熵解码，可提高图像特征提取的速度、节省存储空间；实验结果表明，此方法具有检索效率高、检索效果好的特点。

IR-retrieval also estimates more rainfall in the Intertropical Convergence Zone and less in the subtropics. The regional precipitation retrieval using microwave emission technique tends to be slightly larger than microwave scattering technique through the year.

纬度分布变化方面，靠近赤道的辐合带降雨量比其他方法高，而副热带区域比较低，随时间变化方面，则是倾向於呈现较大的季节变化。

During the past long period, much progress has been realized on the study of the retrieval of LST based on remote sensing, and many algorithms for the LST retrieval have been developed. However, in these algorithms non-isothermal mixed-pixels are all treated as an isothermal and homogeneous surface, which caused directly the results that the LST obtained by these algorithms is only an average temperature of mixed-pixel.

在过去很长一段时间里，地表温度的遥感反演取得了长足的进展，发展了大量的反演算法，但是这些算法都把普遍存在的非同温混合像元视为同温同质体，直接导致反演所得的只是物理意义模糊不清的混合像元的平均温度。

In order to speed up the image retrieval based on texture,an image retrieval method using gray-level co-occurrence matrix and Sobel operator was proposed.

为了加快基于纹理的图像检索的速度，提出了一种灰度共生矩阵和 Sobel算子结合的图像检索方法。

We introduced the existing domestic and foreign pictures retrieval system and compared with the merit, the system structure and the general processing method which had based on the content picture retrieval system.

本文介绍了现有的国内外图像检索系统，比较了基于内容的图像检索系统所具有的优点、系统结构及一般的处理方法。

Its directed graph structure and mixed contents consist of correct candidates and wrong candidates, not only result in very low retrieval accuary for traditional retrieval methods, but also need much more index space and searching time.

其中的一个核心问题就在于，Lattice并不是一个易于索引的数据形式，它的有向图结构，以及正确信息与错误信息相混杂的特点，不但直接导致了传统的检索方法性能不佳，而且也需要较大的存储开销和搜索时间。

The core features of this search engine can make it true for a company to finish a fulltext retrieval from different monogenesis or format datas, which enables the company to get an efficient, correct and safe solution during a data retrieval.

本搜索引擎的核心功能是实现对企业不同源、不同格式数据的全文检索，为企业数据的检索提供高效、准确和安全的解决方案。

Thirdly, phase retrieval by use of Gerchberg-Saxton algorithm based algorithm and phase retrieval by use of a Green's function under Neumann boundary conditions is applied to DGWFS.

第三章分别对基于Gesrchberg-Saxton法的迭代法和Neumann边界条件的Green函数法的波前恢复进行了计算机模拟，并给出了具体程序框图。

However, the state-of-the-art performance of web image retrieval is still far from satisfaction. The main difficulty resides in the fact that the Web is a huge distributed database and on-line users would not like to wait overlong for results of retrieval.

但同时它又是一个极为困难的问题，困难主要来源于Web图像检索环境是一个规模惊人的分布式图像数据库，而且互联网用户一般不愿意花过长的时间等待检索结果。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。