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迭代提取
相关语句
  iterative extraction
     An Information Retrieval Algorithm Based on the Iterative Extraction of Keyphrases
     基于主题词迭代提取的信息检索算法
短句来源
     In order to ensure that users accurately and quickly obtain what they are interested in from a great amount of knowledge information, an information retrieval algorithm based on the iterative extraction of key phrases is presented by synthetically considering the head information (title, abstract and keywords) and key body content of a document. By this algorithm, the precision rate of topic extraction reaches 83% with the efficiency being unaffected, and the performance of topic information retrieval is also increased.
     为了让用户从海量知识信息中精确、快速地获取到感兴趣的信息内容,综合考虑文档的头部信息(标题、摘要、关键词)和重点主体内容,采用基于主题词迭代提取的信息检索算法,使得主题词的提取在兼顾效率的同时准确率达到83%以上,主题信息检索的性能也随之增加。
短句来源
     Experimental results indicate that, by reasonably adjusting the relativity weights of candidate keyphrases on the basis of Term Frequency-Inverse Document Frequency and employing the proposed iterative extraction algorithm, the retrieval of topic information can achieve remarkable precision.
     实验结果表明,在文档查询词频和倒排文档频率(TF-IDF)的基础上对候选主题词相关度权值的计算进行合理化调整,并利用所提出的主题词迭代提取算法,主题信息检索的有效性将显著增加.
短句来源
  “迭代提取”译为未确定词的双语例句
     A New Algorithm to Fit Curves Based on Keypoints Which were Extract Iteratively
     一种基于迭代提取关键点的曲线拟合新算法
短句来源
     Because of the response characteristic of the command, a left-to-right iterative process is proposed to estimate the parameters in turn.
     提取命令参数时根据命令响应函数的特性,设计了从左往右、依次迭代提取的方法。
短句来源
     In computer aided design and some correlative fields,it is needed to fit curves accurately. For this reason,a new algorithm to fit curves based on key points which were extract iteratively is presented in this paper.
     在计算机辅助设计及相关领域中 ,需要对曲线进行精确的拟合 ,针对这一需求 ,提出了一种基于迭代提取关键点的曲线拟合新算法 .
短句来源
     Compared with the center position gotten by centrobaric method and self-adaptive threshold method,it is found that the proposed method enables to extract the light stripe center position exactly and steadily to outperform with a precision of 10 μm and higher anti-interference capacity.
     实验结果表明,自适应迭代提取算法可以得到较稳定、更准确的光刀中心位置数据,精度可从50μm提高到10μm左右,并具有受外界干扰影响较小的特点,因此满足了线结构光测量系统的测量精度要求.
短句来源
  相似匹配句对
     S. tenebrarius H6 total DNA was extracted and incomplete digested with Sau3A I .
     提取S.
短句来源
     A ITERATIVE ALGORITHM TO DETECT CONTOURS
     图像轮廓提取迭代收缩算法
短句来源
     Extracting Car's Contour Based on Iterative Energy Operation
     基于能量迭代运算提取汽车轮廓
短句来源
     Extraction the Ricin from the Castor Dregs
     蓖麻毒蛋白提取
短句来源
     Iteration is monotonously convergent.
     迭代是单调收敛的;
短句来源
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The atmosphere correction of multi angle remote sensing should consider the atmosphere surface coupled system and iterative inversion to calculate the coupled factor.This paper makes use of Rahman BRDF model and the iterative BRDF atmospheric correction method for NOAA satellite data to obtain multi angle atmosphere corrected images. The experiment has proved the feasibility of applying the MODIS atmosphere correction method to existing multi angle NOAA satellite data. Spectral curves after BRDF atmosphere...

The atmosphere correction of multi angle remote sensing should consider the atmosphere surface coupled system and iterative inversion to calculate the coupled factor.This paper makes use of Rahman BRDF model and the iterative BRDF atmospheric correction method for NOAA satellite data to obtain multi angle atmosphere corrected images. The experiment has proved the feasibility of applying the MODIS atmosphere correction method to existing multi angle NOAA satellite data. Spectral curves after BRDF atmosphere correction match the surface curves mostly and the iteration converges fast. Under find weather condition, the error is very small after only one iteration. By comparison, the difference of image reflectance between the original image and the image after BRDF atmosphere correction can reach 30%. The variation trend of original images reflectance is different greatly from the measuring value of ground along with the angle changing. This result shows that BRDF atmosphere correction is indispensable,and even that the NOAA satellite data should not be used to quantitative remote sensing research,if it have not been corrected for atmosphere. Now, obtaining multi angle satellite remote sensing data exists a lot of difficulty, and the atmosphere correction is an indispensable step in multi angle remote sesing application for present obtainable abundance NOAA data.All these are only preliminary experimental results, and there still are some problems needed to do further study.For example, under bad weather condition,what will be the atmosphere correction result? It other BRDF modes such as Ambrals are adopted, will the atmosphere correction result be the same with the Rahmans? These also need the researchs on multi angle remote sensing theory to do futher study.

本文利用连续数天的NOAA卫星数据 ,采用Rahman地表二向反射模型和基于地面 BRDF 反射率的大气校正方法反复迭代提取出多个角度大气校正后的图像 ,并对结果进行了分析。实验结果表明了在多角度遥感定量研究中BRDF大气校正的重要性 ,大气校正结果与地面实测结果相近 ,且迭代收敛迅速

In computer aided design and some correlative fields,it is needed to fit curves accurately.For this reason,a new algorithm to fit curves based on key points which were extract iteratively is presented in this paper.It searchs the key points between tow end points using iterative moethod.It tow new sequent key points are added,the former key point between them will be deleted to reduce the number of the key points.This approach could control the precision by some threshold.Because the threshold is alterable,designers...

In computer aided design and some correlative fields,it is needed to fit curves accurately.For this reason,a new algorithm to fit curves based on key points which were extract iteratively is presented in this paper.It searchs the key points between tow end points using iterative moethod.It tow new sequent key points are added,the former key point between them will be deleted to reduce the number of the key points.This approach could control the precision by some threshold.Because the threshold is alterable,designers could set it according to their need until a certain precisionis gotten.The principle of this algorithm,along with its realizing process and the results is introduced in this paper.According to the experiments,this algorithm is easy to compute and it can make a nice fitting using least but precise keypoints

在计算机辅助设计及相关领域中 ,需要对曲线进行精确的拟合 ,针对这一需求 ,提出了一种基于迭代提取关键点的曲线拟合新算法 .在该算法中 ,对两个端点之间的一段曲线迭代寻找关键点 ,当相邻两曲线段上加上关键点时则删除他们之间的一个原有关键点 ,以减少关键点数量 .算法用阈值T作为结束条件来控制精度 .由于T值可变 ,设计者可根据不同需求自行设置T值直到满足某一特定的要求为止 .文中给出了算法的原理、实现过程以及试验结果 .结果表明 ,该算法计算简单 ,以少而精确的关键点使曲线进行拟合达到较好的效果 .

In order to ensure that users accurately and quickly obtain what they are interested in from a great amount of knowledge information, an information retrieval algorithm based on the iterative extraction of key phrases is presented by synthetically considering the head information (title, abstract and keywords) and key body content of a document. By this algorithm, the precision rate of topic extraction reaches 83% with the efficiency being unaffected, and the performance of topic information retrieval is also...

In order to ensure that users accurately and quickly obtain what they are interested in from a great amount of knowledge information, an information retrieval algorithm based on the iterative extraction of key phrases is presented by synthetically considering the head information (title, abstract and keywords) and key body content of a document. By this algorithm, the precision rate of topic extraction reaches 83% with the efficiency being unaffected, and the performance of topic information retrieval is also increased. Experimental results indicate that, by reasonably adjusting the relativity weights of candidate keyphrases on the basis of Term Frequency-Inverse Document Frequency and employing the proposed iterative extraction algorithm, the retrieval of topic information can achieve remarkable precision.

为了让用户从海量知识信息中精确、快速地获取到感兴趣的信息内容,综合考虑文档的头部信息(标题、摘要、关键词)和重点主体内容,采用基于主题词迭代提取的信息检索算法,使得主题词的提取在兼顾效率的同时准确率达到83%以上,主题信息检索的性能也随之增加。实验结果表明,在文档查询词频和倒排文档频率(TF-IDF)的基础上对候选主题词相关度权值的计算进行合理化调整,并利用所提出的主题词迭代提取算法,主题信息检索的有效性将显著增加.

 
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