查询词典 preprocess

A crawling mechanism based on address section control and content graph control is proposed, which makes the crawling efficiency increases by 36.1%; In preprocess and indexing stage, through analysis of lex technology,...

实验表明，各子系统的实施使垂直搜索引擎在满足查全率的前提下达到查准率要求，在系统应用中带来了很好的效果。

For the particularity of faecal sample, the quality and quantity of DNA extracted from faecal samples can be affected by may factors, such as sampling, preservation, subsampling, preprocess, extracting and PCR.

粪便DNA的获取不仅与提取方法有关，还受到样品采集、保存、二次取样、预处理等相关环节的影响，对其中任一环节的忽视都会导致试验达不到理想效果。

In this paper, thermogram was used to do human face recognition. The thermogram of human face was captured from infrared camera. Image processing technologies were used to preprocess the captured thermogram. Then several features were extracted from the processed thermogram. These features included the distribution of temperature statistics, the perimeter of the face, the length/width ratio of the smallest rectangle which contained the face, and the triangle formed from the three lowest temperature points of the two cheeks and the chin. A three-layer back-propagation neural network was used as the recognition tool.

本文中利用红外线摄影机撷取人之脸部所散发之热分布影像以进行人脸辨识，热影像经过前处理后，再撷取与温度分布有关之相关特徵资料，所撷取之特徵资料包括温度统计分布、脸部边缘长度、包含脸部之最小矩形之长宽比、以及两颊与下巴三个部位之温度最低点之距离，并使用三层架构的倒传递类神经网路作为辨识的工具，辨识的过程包括两个步骤：训练与测试。

The ordinary edge detection methods such as Sobel and Canny operators are immune to noise, which result in cophasal axes discontinuity due to lack of edge information caused by noise. In order to extract cophasal axes more continuous and immune to noise, a novel approach is developed based on edge detection. Firstly, the median filter and improved Sobel method are used to preprocess seismic section images. Secondly, the threshold value is determined automatically based on variance to detect abnormal information. Finally, the complete cophasal axes are extracted after a post-processing.

由于边缘检测中常用的Sobel算子和Canny算子检测同相轴时对噪声免疫差，常因噪声因素引起边缘信息缺失导致同相轴提取不连续，本文采用中值滤波并对Sobel算子进行改进，对地震剖面图进行预处理，结合均方差自动确定阈值并进行异常检测，提取完整同相轴。

Blood speckle noise in the IVUS image would affect the validity of edge detection badly. A temporal/spatial filtering method was used to preprocess the IVUS image to restrain the noise. Then a method to automatically detect the intima and ectoblastic edge of IVUS image was presented. This method is based on the active contour model and the contrast properties of IVUS image, which makes use of the Hopfield NN and simulated annealing algorithm.

为解决血管内超声图像中严重的血液斑点噪声影响边缘提取方法的有效性问题，采用一种时/空滤波方法对IVUS图像进行降噪预处理，基于活动轮廓模型和IVUS图像的边缘对比度特征量，利用Hopfield神经网络并结合模拟退火算法自动提取IVUS图像的冠脉血管壁内、外膜边缘。

The algorithm smooths the gray histogram of the test image with Harr wavelet to remove the "pseudo valley", and fixes a range of the threshold according to the prior information in the standard image, and then finds out the valley of the histogram in the range and that is the threshold. The ex perimental results show that the preprocess algorithm is able to obtain a satisfactory threshold for the binarization of the test image.

该方法使用Harr小波对待测图像的灰度直方图进行平滑处理来消除其中的&伪谷值点&，再充分利用标准图像的先验信息来确定一个二值化分割阈值的大致范围，最后在这个范围内找到直方图的谷值，这即是所需的阈值。

The system could acquire images of sample at any beginning position, and if only the parameters of image have been set properly, the system could automatically inspect the headplate packaging. An adaptive morphological filter based on 2-D image entropy is used to preprocess the original images.

在系统硬件设计中，采用计算机与单片机通信的方式来控制作为载物平台的高精度二维运动系统的连续操作运行，我们可以从不同的初始位置对被检测样品进行图像采集，也可以预设图像采集参数和检测流程实现系统自动检测。

The application of this theory in the attributable optimization of fault diagnosis characteristic parameters is explored. After a brief description of concepts involved in the paper, such as rough set theory and the indiscernibility relation, the methods of how to preprocess the loss value of data and how to discrete the data are discussed.

论文对粗糙集理论及方法在神经网络技术中的应用进行了研究，从而将粗糙集理论与神经网络技术相结合，提出了基于粗糙集理论的神经网络识别系统，利用粗糙集理论来确定神经网络的输入节点数，降低了神经网络的结构的复杂性，给出了该算法的详细步骤。

Firstly, based on the requirement of CFD application in modern turbomachine and grasping FLUENT that is a commercial preprocess code, secondary exploiture, which is a complex coarse that is from designment and optimization of project to exporting result and database management, was finished by utilizing OOP and database technologies, Plentiful time for numerical simulation of centrifugal compressor was saved by using the parameterized program.

首先，本文主要根据CFD 参与现代透平机械的要求，在深刻理解、熟悉了大型商业软件FLUENT 的基础上，采用面向对象技术和数据库技术，针对离心压缩机从设计、优化到方案确定，再到结果输出并进行数据库管理的全过程，进行了二次开发。

The method filtrates the minutiae byfusing two results of different preprocess methods, and then eliminate pseudominutiae according to its structure.

通过融合两种不同预处理方法所获得的结果来初步筛选特征点，然后根据特征点的结构信息来消除伪特征点。

Finally, according to market conditions and market products this article paper analyzes the trends in the development of camera technology, and designs a color night vision camera.

最后根据市场情况和市面上产品的情况分析了摄像机技术的发展趋势，并设计了一款彩色夜视摄像机。

Only person height weeds and the fierce looks stone idles were there.

只有半人深的荒草和龇牙咧嘴的神像。